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2024-09-06Merge tag 'drm-intel-fixes-2024-09-05' of ↵Dave Airlie
https://gitlab.freedesktop.org/drm/i915/kernel into drm-fixes - drm/i915: Do not attempt to load the GSC multiple times (Daniele Ceraolo Spurio) - drm/i915: Fix readout degamma_lut mismatch on ilk/snb (Ville Syrjälä) - drm/i915/fence: Mark debug_fence_init_onstack() with __maybe_unused (Andy Shevchenko) - drm/i915/fence: Mark debug_fence_free() with __maybe_unused (Andy Shevchenko) - drm/i915/display: Add mechanism to use sink model when applying quirk [display] (Jouni Högander) - drm/i915/display: Increase Fast Wake Sync length as a quirk [display] (Jouni Högander) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Tvrtko Ursulin <tursulin@igalia.com> Link: https://patchwork.freedesktop.org/patch/msgid/Ztlo2hVO4SBvfAnq@linux
2024-09-05Merge tag 'regulator-fix-v6.11-stub' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator Pull regulator fix from Mark Brown: "A fix from Doug Anderson for a missing stub, required to fix the build for some newly added users of devm_regulator_bulk_get_const() in !REGULATOR configurations" * tag 'regulator-fix-v6.11-stub' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator: regulator: core: Stub devm_regulator_bulk_get_const() if !CONFIG_REGULATOR
2024-09-05Merge tag 'rust-fixes-6.11-2' of https://github.com/Rust-for-Linux/linuxLinus Torvalds
Pull Rust fixes from Miguel Ojeda: "Toolchain and infrastructure: - Fix builds for nightly compiler users now that 'new_uninit' was split into new features by using an alternative approach for the code that used what is now called the 'box_uninit_write' feature - Allow the 'stable_features' lint to preempt upcoming warnings about them, since soon there will be unstable features that will become stable in nightly compilers - Export bss symbols too 'kernel' crate: - 'block' module: fix wrong usage of lockdep API 'macros' crate: - Provide correct provenance when constructing 'THIS_MODULE' Documentation: - Remove unintended indentation (blockquotes) in generated output - Fix a couple typos MAINTAINERS: - Remove Wedson as Rust maintainer - Update Andreas' email" * tag 'rust-fixes-6.11-2' of https://github.com/Rust-for-Linux/linux: MAINTAINERS: update Andreas Hindborg's email address MAINTAINERS: Remove Wedson as Rust maintainer rust: macros: provide correct provenance when constructing THIS_MODULE rust: allow `stable_features` lint docs: rust: remove unintended blockquote in Quick Start rust: alloc: eschew `Box<MaybeUninit<T>>::write` rust: kernel: fix typos in code comments docs: rust: remove unintended blockquote in Coding Guidelines rust: block: fix wrong usage of lockdep API rust: kbuild: fix export of bss symbols
2024-09-05Merge tag 'trace-v6.11-rc4' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull tracing fixes from Steven Rostedt: - Fix adding a new fgraph callback after function graph tracing has already started. If the new caller does not initialize its hash before registering the fgraph_ops, it can cause a NULL pointer dereference. Fix this by adding a new parameter to ftrace_graph_enable_direct() passing in the newly added gops directly and not rely on using the fgraph_array[], as entries in the fgraph_array[] must be initialized. Assign the new gops to the fgraph_array[] after it goes through ftrace_startup_subops() as that will properly initialize the gops->ops and initialize its hashes. - Fix a memory leak in fgraph storage memory test. If the "multiple fgraph storage on a function" boot up selftest fails in the registering of the function graph tracer, it will not free the memory it allocated for the filter. Break the loop up into two where it allocates the filters first and then registers the functions where any errors will do the appropriate clean ups. - Only clear the timerlat timers if it has an associated kthread. In the rtla tool that uses timerlat, if it was killed just as it was shutting down, the signals can free the kthread and the timer. But the closing of the timerlat files could cause the hrtimer_cancel() to be called on the already freed timer. As the kthread variable is is set to NULL when the kthreads are stopped and the timers are freed it can be used to know not to call hrtimer_cancel() on the timer if the kthread variable is NULL. - Use a cpumask to keep track of osnoise/timerlat kthreads The timerlat tracer can use user space threads for its analysis. With the killing of the rtla tool, the kernel can get confused between if it is using a user space thread to analyze or one of its own kernel threads. When this confusion happens, kthread_stop() can be called on a user space thread and bad things happen. As the kernel threads are per-cpu, a bitmask can be used to know when a kernel thread is used or when a user space thread is used. - Add missing interface_lock to osnoise/timerlat stop_kthread() The stop_kthread() function in osnoise/timerlat clears the osnoise kthread variable, and if it was a user space thread does a put_task on it. But this can race with the closing of the timerlat files that also does a put_task on the kthread, and if the race happens the task will have put_task called on it twice and oops. - Add cond_resched() to the tracing_iter_reset() loop. The latency tracers keep writing to the ring buffer without resetting when it issues a new "start" event (like interrupts being disabled). When reading the buffer with an iterator, the tracing_iter_reset() sets its pointer to that start event by walking through all the events in the buffer until it gets to the time stamp of the start event. In the case of a very large buffer, the loop that looks for the start event has been reported taking a very long time with a non preempt kernel that it can trigger a soft lock up warning. Add a cond_resched() into that loop to make sure that doesn't happen. - Use list_del_rcu() for eventfs ei->list variable It was reported that running loops of creating and deleting kprobe events could cause a crash due to the eventfs list iteration hitting a LIST_POISON variable. This is because the list is protected by SRCU but when an item is deleted from the list, it was using list_del() which poisons the "next" pointer. This is what list_del_rcu() was to prevent. * tag 'trace-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: tracing/timerlat: Add interface_lock around clearing of kthread in stop_kthread() tracing/timerlat: Only clear timer if a kthread exists tracing/osnoise: Use a cpumask to know what threads are kthreads eventfs: Use list_del_rcu() for SRCU protected list variable tracing: Avoid possible softlockup in tracing_iter_reset() tracing: Fix memory leak in fgraph storage selftest tracing: fgraph: Fix to add new fgraph_ops to array after ftrace_startup_subops()
2024-09-05x86/sgx: Log information when a node lacks an EPC sectionAaron Lu
For optimized performance, firmware typically distributes EPC sections evenly across different NUMA nodes. However, there are scenarios where a node may have both CPUs and memory but no EPC section configured. For example, in an 8-socket system with a Sub-Numa-Cluster=2 setup, there are a total of 16 nodes. Given that the maximum number of supported EPC sections is 8, it is simply not feasible to assign one EPC section to each node. This configuration is not incorrect - SGX will still operate correctly; it is just not optimized from a NUMA standpoint. For this reason, log a message when a node with both CPUs and memory lacks an EPC section. This will provide users with a hint as to why they might be experiencing less-than-ideal performance when running SGX enclaves. Suggested-by: Dave Hansen <dave.hansen@intel.com> Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Acked-by: Kai Huang <kai.huang@intel.com> Link: https://lore.kernel.org/all/20240905080855.1699814-3-aaron.lu%40intel.com
2024-09-05x86/sgx: Fix deadlock in SGX NUMA node searchAaron Lu
When the current node doesn't have an EPC section configured by firmware and all other EPC sections are used up, CPU can get stuck inside the while loop that looks for an available EPC page from remote nodes indefinitely, leading to a soft lockup. Note how nid_of_current will never be equal to nid in that while loop because nid_of_current is not set in sgx_numa_mask. Also worth mentioning is that it's perfectly fine for the firmware not to setup an EPC section on a node. While setting up an EPC section on each node can enhance performance, it is not a requirement for functionality. Rework the loop to start and end on *a* node that has SGX memory. This avoids the deadlock looking for the current SGX-lacking node to show up in the loop when it never will. Fixes: 901ddbb9ecf5 ("x86/sgx: Add a basic NUMA allocation scheme to sgx_alloc_epc_page()") Reported-by: "Molina Sabido, Gerardo" <gerardo.molina.sabido@intel.com> Signed-off-by: Aaron Lu <aaron.lu@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kai Huang <kai.huang@intel.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Acked-by: Dave Hansen <dave.hansen@linux.intel.com> Tested-by: Zhimin Luo <zhimin.luo@intel.com> Link: https://lore.kernel.org/all/20240905080855.1699814-2-aaron.lu%40intel.com
2024-09-05ila: call nf_unregister_net_hooks() soonerEric Dumazet
syzbot found an use-after-free Read in ila_nf_input [1] Issue here is that ila_xlat_exit_net() frees the rhashtable, then call nf_unregister_net_hooks(). It should be done in the reverse way, with a synchronize_rcu(). This is a good match for a pre_exit() method. [1] BUG: KASAN: use-after-free in rht_key_hashfn include/linux/rhashtable.h:159 [inline] BUG: KASAN: use-after-free in __rhashtable_lookup include/linux/rhashtable.h:604 [inline] BUG: KASAN: use-after-free in rhashtable_lookup include/linux/rhashtable.h:646 [inline] BUG: KASAN: use-after-free in rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672 Read of size 4 at addr ffff888064620008 by task ksoftirqd/0/16 CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc4-syzkaller-00238-g2ad6d23f465a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 rht_key_hashfn include/linux/rhashtable.h:159 [inline] __rhashtable_lookup include/linux/rhashtable.h:604 [inline] rhashtable_lookup include/linux/rhashtable.h:646 [inline] rhashtable_lookup_fast+0x77a/0x9b0 include/linux/rhashtable.h:672 ila_lookup_wildcards net/ipv6/ila/ila_xlat.c:132 [inline] ila_xlat_addr net/ipv6/ila/ila_xlat.c:652 [inline] ila_nf_input+0x1fe/0x3c0 net/ipv6/ila/ila_xlat.c:190 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] NF_HOOK+0x29e/0x450 include/linux/netfilter.h:312 __netif_receive_skb_one_core net/core/dev.c:5661 [inline] __netif_receive_skb+0x1ea/0x650 net/core/dev.c:5775 process_backlog+0x662/0x15b0 net/core/dev.c:6108 __napi_poll+0xcb/0x490 net/core/dev.c:6772 napi_poll net/core/dev.c:6841 [inline] net_rx_action+0x89b/0x1240 net/core/dev.c:6963 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:928 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x64620 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xbfffffff(buddy) raw: 00fff00000000000 ffffea0000959608 ffffea00019d9408 0000000000000000 raw: 0000000000000000 0000000000000003 00000000bfffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as freed page last allocated via order 3, migratetype Unmovable, gfp_mask 0x52dc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_ZERO), pid 5242, tgid 5242 (syz-executor), ts 73611328570, free_ts 618981657187 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493 prep_new_page mm/page_alloc.c:1501 [inline] get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [inline] ___kmalloc_large_node+0x8b/0x1d0 mm/slub.c:4103 __kmalloc_large_node_noprof+0x1a/0x80 mm/slub.c:4130 __do_kmalloc_node mm/slub.c:4146 [inline] __kmalloc_node_noprof+0x2d2/0x440 mm/slub.c:4164 __kvmalloc_node_noprof+0x72/0x190 mm/util.c:650 bucket_table_alloc lib/rhashtable.c:186 [inline] rhashtable_init_noprof+0x534/0xa60 lib/rhashtable.c:1071 ila_xlat_init_net+0xa0/0x110 net/ipv6/ila/ila_xlat.c:613 ops_init+0x359/0x610 net/core/net_namespace.c:139 setup_net+0x515/0xca0 net/core/net_namespace.c:343 copy_net_ns+0x4e2/0x7b0 net/core/net_namespace.c:508 create_new_namespaces+0x425/0x7b0 kernel/nsproxy.c:110 unshare_nsproxy_namespaces+0x124/0x180 kernel/nsproxy.c:228 ksys_unshare+0x619/0xc10 kernel/fork.c:3328 __do_sys_unshare kernel/fork.c:3399 [inline] __se_sys_unshare kernel/fork.c:3397 [inline] __x64_sys_unshare+0x38/0x40 kernel/fork.c:3397 page last free pid 11846 tgid 11846 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1094 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612 __folio_put+0x2c8/0x440 mm/swap.c:128 folio_put include/linux/mm.h:1486 [inline] free_large_kmalloc+0x105/0x1c0 mm/slub.c:4565 kfree+0x1c4/0x360 mm/slub.c:4588 rhashtable_free_and_destroy+0x7c6/0x920 lib/rhashtable.c:1169 ila_xlat_exit_net+0x55/0x110 net/ipv6/ila/ila_xlat.c:626 ops_exit_list net/core/net_namespace.c:173 [inline] cleanup_net+0x802/0xcc0 net/core/net_namespace.c:640 process_one_work kernel/workqueue.c:3231 [inline] process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312 worker_thread+0x86d/0xd40 kernel/workqueue.c:3390 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88806461ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff88806461ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888064620000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff888064620080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff888064620100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff Fixes: 7f00feaf1076 ("ila: Add generic ILA translation facility") Reported-by: syzbot <syzkaller@googlegroups.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Tom Herbert <tom@herbertland.com> Reviewed-by: Florian Westphal <fw@strlen.de> Link: https://patch.msgid.link/20240904144418.1162839-1-edumazet@google.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-05tools/net/ynl: fix cli.py --subscribe featureArkadiusz Kubalewski
Execution of command: ./tools/net/ynl/cli.py --spec Documentation/netlink/specs/dpll.yaml / --subscribe "monitor" --sleep 10 fails with: File "/repo/./tools/net/ynl/cli.py", line 109, in main ynl.check_ntf() File "/repo/tools/net/ynl/lib/ynl.py", line 924, in check_ntf op = self.rsp_by_value[nl_msg.cmd()] KeyError: 19 Parsing Generic Netlink notification messages performs lookup for op in the message. The message was not yet decoded, and is not yet considered GenlMsg, thus msg.cmd() returns Generic Netlink family id (19) instead of proper notification command id (i.e.: DPLL_CMD_PIN_CHANGE_NTF=13). Allow the op to be obtained within NetlinkProtocol.decode(..) itself if the op was not passed to the decode function, thus allow parsing of Generic Netlink notifications without causing the failure. Suggested-by: Donald Hunter <donald.hunter@gmail.com> Link: https://lore.kernel.org/netdev/m2le0n5xpn.fsf@gmail.com/ Fixes: 0a966d606c68 ("tools/net/ynl: Fix extack decoding for directional ops") Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com> Reviewed-by: Donald Hunter <donald.hunter@gmail.com> Link: https://patch.msgid.link/20240904135034.316033-1-arkadiusz.kubalewski@intel.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-05MAINTAINERS: fix ptp ocp driver maintainers addressVadim Fedorenko
While checking the latest series for ptp_ocp driver I realised that MAINTAINERS file has wrong item about email on linux.dev domain. Fixes: 795fd9342c62 ("ptp_ocp: adjust MAINTAINERS and mailmap") Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev> Reviewed-by: Simon Horman <horms@kernel.org> Link: https://patch.msgid.link/20240904131855.559078-1-vadim.fedorenko@linux.dev Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-05selftests: net: enable bind testsJamie Bainbridge
bind_wildcard is compiled but not run, bind_timewait is not compiled. These two tests complete in a very short time, use the test harness properly, and seem reasonable to enable. The author of the tests confirmed via email that these were intended to be run. Enable these two tests. Fixes: 13715acf8ab5 ("selftest: Add test for bind() conflicts.") Fixes: 2c042e8e54ef ("tcp: Add selftest for bind() and TIME_WAIT.") Signed-off-by: Jamie Bainbridge <jamie.bainbridge@gmail.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://patch.msgid.link/5a009b26cf5fb1ad1512d89c61b37e2fac702323.1725430322.git.jamie.bainbridge@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2024-09-05docs/zh_CN: update the translation of security-bugsDongliang Mu
Update to commit 5928d411557e ("Documentation: Document the Linux Kernel CVE process") commit 0217f3944aeb ("Documentation: security-bugs.rst: linux-distros relaxed their rules") commit 3c1897ae4b6b ("Documentation: security-bugs.rst: clarify CVE handling") commit 4fee0915e649 ("Documentation: security-bugs.rst: update preferences when dealing with the linux-distros group") commit 44ac5abac86b ("Documentation/security-bugs: move from admin-guide/ to process/") Signed-off-by: Dongliang Mu <dzm91@hust.edu.cn> Reviewed-by: Alex Shi <alexs@kernel.org> Reviewed-by: Yanteng Si <siyanteng@loongson.cn> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240611020514.48770-1-dzm91@hust.edu.cn
2024-09-05docs: block: Fix grammar and spelling mistakes in bfq-iosched.rstKarol Przybylski
This patch corrects several grammar and spelling errors in the Documentation/block/bfq-iosched.rst file. These changes improve the clarity and readability of the documentation. Signed-off-by: Karol Przybylski <karprzy7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240814155558.3672833-1-karprzy7@gmail.com
2024-09-05Documentation: Fix spelling mistakesAmit Vadhavana
Correct spelling mistakes in the documentation to improve readability. Signed-off-by: Amit Vadhavana <av2082000@gmail.com> Reviewed-by: Bjorn Helgaas <bhelgaas@google.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240817072724.6861-1-av2082000@gmail.com
2024-09-05Documentation/gpu: Fix typo in Documentation/gpu/komeda-kms.rstAryabhatta Dey
Change 'indenpendently' to 'independently'. Signed-off-by: Aryabhatta Dey <aryabhattadey35@gmail.com> Acked-by: Liviu Dudau <liviu.dudau@arm.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/l5wzytcamcc43eadaquqbrfqilq6ajfnnseh37c77eceamtw35@hhtdipi4h22c
2024-09-05scripts: sphinx-pre-install: remove unnecessary double check for $cur_versionSebastian Muxel
$cur_version is currently being tested twice with the first test resulting in an unhelpful "$sphinx returned an error", not continuing to the more helpful "$sphinx didn't return its version". This patch removes the first test to return the more useful message. Fixes: a8b380c379ef ("scripts: sphinx-pre-install: only ask to activate valid venvs") Signed-off-by: Sebastian Muxel <sebastian@muxel.dev> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240827133224.160776-1-sebastian@muxel.dev
2024-09-05Loongarch: KVM: Add KVM hypercalls documentation for LoongArchBibo Mao
Add documentation topic for using pv_virt when running as a guest on KVM hypervisor. Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Xianglai Li <lixianglai@loongson.cn> Co-developed-by: Mingcong Bai <jeffbai@aosc.io> Signed-off-by: Mingcong Bai <jeffbai@aosc.io> Link: https://lore.kernel.org/all/5c338084b1bcccc1d57dce9ddb1e7081@aosc.io/ Signed-off-by: Dandan Zhang <zhangdandan@uniontech.com> [jc: fixed htmldocs build error] Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/4769C036576F8816+20240828045950.3484113-1-zhangdandan@uniontech.com
2024-09-05kunit: Fix missing kerneldoc commentDavid Gow
Add a missing kerneldoc comment for the 'test' test context parameter, fixing the following warning: include/kunit/test.h:492: warning: Function parameter or struct member 'test' not described in 'kunit_kfree_const' Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Closes: https://lore.kernel.org/lkml/20240827160631.67e121ed@canb.auug.org.au/ Fixes: f2c6dbd22017 ("kunit: Device wrappers should also manage driver name") Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Kees Cook <kees@kernel.org> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2024-09-05Documentation: Document the kernel flag bdev_allow_write_mountedGuilherme G. Piccoli
Commit ed5cc702d311 ("block: Add config option to not allow writing to mounted devices") added a Kconfig option along with a kernel command-line tuning to control writes to mounted block devices, as a means to deal with fuzzers like Syzkaller, that provokes kernel crashes by directly writing on block devices bypassing the filesystem (so the FS has no awareness and cannot cope with that). The patch just missed adding such kernel command-line option to the kernel documentation, so let's fix that. Cc: Bart Van Assche <bvanassche@acm.org> Cc: Darrick J. Wong <djwong@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Reviewed-by: Jan Kara <jack@suse.cz> Signed-off-by: Guilherme G. Piccoli <gpiccoli@igalia.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240828145045.309835-1-gpiccoli@igalia.com
2024-09-05docs: scheduler: completion: Update member of struct completionI Hsin Cheng
The member "wait" in struct completion isn't of type wait_queue_head_t anymore, as it is now "struct swait_queue_head", fix it to match with the current implementation. Signed-off-by: I Hsin Cheng <richard120310@gmail.com> Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240828165036.178011-1-richard120310@gmail.com
2024-09-05docs: kerneldoc-preamble.sty: Suppress extra spaces in CJK literal blocksAkira Yokosawa
In zh_CN part of translations.pdf, there are several ASCII-art diagrams whose vertical lines look sometimes jagged. This is due to the interference between default settings of xeCJK and fancyvrb (employed in sphinxVerbatim env), where extra space is inserted between a latin char and a non-latin char when they are next to each other (i.e., no explicit white space). This issue can be suppressed by invoking \CJKsetecglue{} at the beginning of every sphinxVerbatim enviornment. \AtBeginEnvironment, provided by the etoolbox package, is useful in this case. Signed-off-by: Akira Yokosawa <akiyks@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240905050941.31439-1-akiyks@gmail.com
2024-09-05arm64: dts: rockchip: add CAN0 and CAN1 interfaces to mecsbc boardDavid Jander
This patch adds support for the CAN0 and CAN1 interfaces to the board. Signed-off-by: David Jander <david@protonic.nl> Tested-by: Alibek Omarov <a1ba.omarov@gmail.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20240904-rk3568-canfd-v1-2-73bda5fb4e03@pengutronix.de Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2024-09-05arm64: dts: rockchip: add CAN-FD controller nodes to rk3568David Jander
Add nodes to the rk3568 devicetree to support the CAN-FD controllers. Signed-off-by: David Jander <david@protonic.nl> Tested-by: Alibek Omarov <a1ba.omarov@gmail.com> Reviewed-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de> Link: https://lore.kernel.org/r/20240904-rk3568-canfd-v1-1-73bda5fb4e03@pengutronix.de Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2024-09-05Merge tag 'v6.11-rc6' into docs-mwJonathan Corbet
This is done primarily to get a docs build fix merged via another tree so that "make htmldocs" stops failing.
2024-09-05Merge tag 'sunxi-dt-for-6.12' of ↵Arnd Bergmann
https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into soc/dt Allwinner SoC device tree changes for 6.12 ARM64 device tree and binding-only changes - Move PMIC on RG35XX boards from RSB (Allwinner proprietary bus) to I2C - Introduce Anbernic RG35XX-SP board - Enable charger on RG35XX boards - Add thermal trip points for Allwinner A64 GPU * tag 'sunxi-dt-for-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux: arm64: dts: allwinner: a64: Add GPU thermal trips to the SoC dtsi arm64: dts: allwinner: h700: Add charger for Anbernic RG35XX arm64: dts: allwinner: h700: Add Anbernic RG35XX-SP arm64: dts: allwinner: h616: Change RG35XX Series from r_rsb to r_i2c arm64: dts: allwinner: h616: Add r_i2c pinctrl nodes dt-bindings: arm: sunxi: Add Anbernic RG35XXSP Link: https://lore.kernel.org/r/ZtnZRhTwsBeO7Qtb@wens.tw Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-09-05Merge tag 'sunxi-drivers-for-6.12' of ↵Arnd Bergmann
https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux into soc/drivers Allwinner SoC driver changes for 6.12 - Simplify sunxi-rsb driver probe function using dev_err_probe() * tag 'sunxi-drivers-for-6.12' of https://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux: bus: sunxi-rsb: Simplify code with dev_err_probe() Link: https://lore.kernel.org/r/ZtnYUswjHdLRYq8Y@wens.tw Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-09-05Merge tag 'md-6.12-20240905' of ↵Jens Axboe
https://git.kernel.org/pub/scm/linux/kernel/git/song/md into for-6.12/block Pull MD fix from Song: "This patch, from Mateusz Kusiak, improves the information reported in /proc/mdstat." * tag 'md-6.12-20240905' of https://git.kernel.org/pub/scm/linux/kernel/git/song/md: md: Report failed arrays as broken in mdstat
2024-09-05drm/i915: Remove extra unlikely helperHongbo Li
In IS_ERR, the unlikely is used for the input parameter, so these is no need to use it again outside. Signed-off-by: Hongbo Li <lihongbo22@huawei.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240831094655.4153520-1-lihongbo22@huawei.com Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2024-09-05Revert "drm/amdgpu: align pp_power_profile_mode with kernel docs"Alex Deucher
This reverts commit 8f614469de248a4bc55fb07e55d5f4c340c75b11. This breaks some manual setting of the profile mode in certain cases. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3600 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> (cherry picked from commit 7a199557643e993d4e7357860624b8aa5d8f4340) Cc: stable@vger.kernel.org
2024-09-05Revert "drm/amdgpu: align pp_power_profile_mode with kernel docs"Alex Deucher
This reverts commit bbb05f8a9cd87f5046d05a0c596fddfb714ee457. This breaks some manual setting of the profile mode in certain cases. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3600 Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2024-09-05regulator: of: Refactor of_get_*regulator() to decrease indentationAndy Shevchenko
Refactor of_get_*regulator() to decrease indentation and increase readability. No functional changes intended. Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org> Link: https://patch.msgid.link/20240904190856.1221459-1-andy.shevchenko@gmail.com Signed-off-by: Mark Brown <broonie@kernel.org>
2024-09-05MAINTAINERS: SPI: Add mailing list imx@lists.linux.dev for nxp spi driversFrank Li
Add mailing list imx@lists.linux.dev for nxp spi drivers(qspi, fspi and dspi). Signed-off-by: Frank Li <Frank.Li@nxp.com> Reviewed-by: Stefan Wahren <wahrenst@gmx.net> Link: https://patch.msgid.link/20240905155230.1901787-1-Frank.Li@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
2024-09-05MAINTAINERS: SPI: Add freescale lpspi maintainer informationFrank Li
Add imx@lists.linux.dev and NXP maintainer information for lpspi driver (drivers/spi/spi-fsl-lpspi.c). Signed-off-by: Frank Li <Frank.Li@nxp.com> Reviewed-by: Stefan Wahren <wahrenst@gmx.net> Link: https://patch.msgid.link/20240905154124.1901311-1-Frank.Li@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
2024-09-05docs: submitting-patches: Advertise b4Mark Brown
b4 is now widely used and is quite helpful for a lot of the things that submitting-patches covers, let's advertise it to submitters to try to make their lives easier and reduce the number of procedural issues maintainers see. Reviewed-by: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Konstantin Ryabitsev <konstantin@linuxfoundation.org> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20240905-documentation-b4-advert-v2-1-24d686ba4117@kernel.org
2024-09-05dt-bindings: incomplete-devices: And another batch of compatiblesRob Herring (Arm)
Another batch of compatibles unlikely to ever be documented. It's mostly old PowerMAC and PPC stuff found in DT compatible API calls. Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Link: https://lore.kernel.org/r/20240904200253.3112699-1-robh@kernel.org Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
2024-09-05Merge tag 'platform-drivers-x86-v6.11-6' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 Pull x86 platform driver fixes from Ilpo Järvinen: - amd/pmf: ASUS GA403 quirk matching tweak - dell-smbios: Fix to the init function rollback path * tag 'platform-drivers-x86-v6.11-6' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: platform/x86/amd: pmf: Make ASUS GA403 quirk generic platform/x86: dell-smbios: Fix error path in dell_smbios_init()
2024-09-05lib/string_choices: Add some comments to make more clear for string choices ↵Hongbo Li
helpers. Add some comments to explain why we should use string_choices helpers. Signed-off-by: Hongbo Li <lihongbo22@huawei.com> Acked-by: Andy Shevchenko <andy@kernel.org> Link: https://lore.kernel.org/r/20240905092540.2962122-3-lihongbo22@huawei.com Signed-off-by: Kees Cook <kees@kernel.org>
2024-09-05lib/string_choices: Introduce several opposite string choice helpersHongbo Li
Similar to the exists helper: str_enable_disable/ str_enabled_disabled/str_on_off/str_yes_no helpers, we can add the opposite helpers. That's str_disable_enable, str_disabled_enabled, str_off_on and str_no_yes. There are more than 10 cases currently (expect str_disable_enable now has 3 use cases) exist in the code can be replaced with these helper. Signed-off-by: Hongbo Li <lihongbo22@huawei.com> Acked-by: Andy Shevchenko <andy@kernel.org> Link: https://lore.kernel.org/r/20240905092540.2962122-2-lihongbo22@huawei.com Signed-off-by: Kees Cook <kees@kernel.org>
2024-09-05lib/string_choices: Add str_true_false()/str_false_true() helperHongbo Li
Add str_true_false()/str_false_true() helper to return "true" or "false" string literal. Signed-off-by: Hongbo Li <lihongbo22@huawei.com> Link: https://lore.kernel.org/r/20240827024517.914100-2-lihongbo22@huawei.com Signed-off-by: Kees Cook <kees@kernel.org>
2024-09-05Merge tag 'linux_kselftest-kunit-fixes-6.11-rc7' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest Pull kunit fix fromShuah Khan: "One single fix to a use-after-free bug resulting from kunit_driver_create() failing to copy the driver name leaving it on the stack or freeing it" * tag 'linux_kselftest-kunit-fixes-6.11-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: kunit: Device wrappers should also manage driver name
2024-09-05platform: cznic: turris-omnia-mcu: Fix error check in omnia_mcu_register_trng()Dan Carpenter
The gpiod_to_irq() function never returns zero. It returns negative error codes or a positive IRQ number. Update the checking to check for negatives. Fixes: 41bb142a4028 ("platform: cznic: turris-omnia-mcu: Add support for MCU provided TRNG") Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org> Reviewed-by: Marek Behún <kabel@kernel.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-09-05wifi: ath12k: Avoid -Wflex-array-member-not-at-end warningsGustavo A. R. Silva
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are getting ready to enable it, globally. Move the conflicting declaration to the end of the structure. Notice that `struct ieee80211_chanctx_conf` is a flexible structure --a structure that contains a flexible-array member. Also, remove an unused structure. Fix the following warnings: drivers/net/wireless/ath/ath12k/core.h:290:39: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/ath/ath12k/dp.h:1499:24: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://patch.msgid.link/ZrZEuxJihMzAaTVh@cute
2024-09-05wifi: ath11k: Avoid -Wflex-array-member-not-at-end warningsGustavo A. R. Silva
-Wflex-array-member-not-at-end was introduced in GCC-14, and we are getting ready to enable it, globally. Move the conflicting declaration to the end of the structure. Notice that `struct ieee80211_chanctx_conf` is a flexible structure --a structure that contains a flexible-array member. Also, remove a couple of unused structures. Fix the following warnings: drivers/net/wireless/ath/ath11k/core.h:409:39: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/ath/ath11k/dp.h:1309:24: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] drivers/net/wireless/ath/ath11k/dp.h:1368:24: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end] Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com> Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Link: https://patch.msgid.link/ZrZB3Rjswe0ZXtug@cute
2024-09-05KVM: Remove HIGH_RES_TIMERS dependencySteven Rostedt
Commit 92b5265d38f6a ("KVM: Depend on HIGH_RES_TIMERS") added a dependency to high resolution timers with the comment: KVM lapic timer and tsc deadline timer based on hrtimer, setting a leftmost node to rb tree and then do hrtimer reprogram. If hrtimer not configured as high resolution, hrtimer_enqueue_reprogram do nothing and then make kvm lapic timer and tsc deadline timer fail. That was back in 2012, where hrtimer_start_range_ns() would do the reprogramming with hrtimer_enqueue_reprogram(). But as that was a nop with high resolution timers disabled, this did not work. But a lot has changed in the last 12 years. For example, commit 49a2a07514a3a ("hrtimer: Kick lowres dynticks targets on timer enqueue") modifies __hrtimer_start_range_ns() to work with low res timers. There's been lots of other changes that make low res work. ChromeOS has tested this before as well, and it hasn't seen any issues with running KVM with high res timers disabled. There could be problems, especially at low HZ, for guests that do not support kvmclock and rely on precise delivery of periodic timers to keep their clock running. This can be the APIC timer (provided by the kernel), the RTC (provided by userspace), or the i8254 (choice of kernel/userspace). These guests are few and far between these days, and in the case of the APIC timer + Intel hosts we can use the preemption timer (which is TSC-based and has better latency _and_ accuracy). In KVM, only x86 is requiring CONFIG_HIGH_RES_TIMERS; perhaps a "depends on HIGH_RES_TIMERS || EXPERT" could be added to virt/kvm, or a pr_warn could be added to kvm_init if HIGH_RES_TIMERS are not enabled. But in general, it seems that there must be other code in the kernel (maybe sound/?) that is relying on having high-enough HZ or hrtimers but that's not documented anywhere. Whenever you disable it you probably need to know what you're doing and what your workload is; so the dependency is not particularly interesting, and we can just remove it. Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Message-ID: <20240821095127.45d17b19@gandalf.local.home> [Added the last two paragraphs to the commit message. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2024-09-05tracing/timerlat: Add interface_lock around clearing of kthread in ↵Steven Rostedt
stop_kthread() The timerlat interface will get and put the task that is part of the "kthread" field of the osn_var to keep it around until all references are released. But here's a race in the "stop_kthread()" code that will call put_task_struct() on the kthread if it is not a kernel thread. This can race with the releasing of the references to that task struct and the put_task_struct() can be called twice when it should have been called just once. Take the interface_lock() in stop_kthread() to synchronize this change. But to do so, the function stop_per_cpu_kthreads() needs to change the loop from for_each_online_cpu() to for_each_possible_cpu() and remove the cpu_read_lock(), as the interface_lock can not be taken while the cpu locks are held. The only side effect of this change is that it may do some extra work, as the per_cpu variables of the offline CPUs would not be set anyway, and would simply be skipped in the loop. Remove unneeded "return;" in stop_kthread(). Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Tomas Glozar <tglozar@redhat.com> Cc: John Kacur <jkacur@redhat.com> Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com> Link: https://lore.kernel.org/20240905113359.2b934242@gandalf.local.home Fixes: e88ed227f639e ("tracing/timerlat: Add user-space interface") Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-05kunit: Fix kernel-doc for EXPORT_SYMBOL_IF_KUNITMichal Wajdeczko
While kunit/visibility.h is today not included in any generated kernel documentation, also likely due to the fact that none of the existing comments are correctly recognized as kernel-doc, but once we decide to add this header and fix the tool, there will be: ../include/kunit/visibility.h:61: warning: Function parameter or struct member 'symbol' not described in 'EXPORT_SYMBOL_IF_KUNIT' Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com> Reviewed-by: Rae Moar <rmoar@google.com> Acked-by: David Gow <davidgow@google.com> Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
2024-09-05tracing/timerlat: Only clear timer if a kthread existsSteven Rostedt
The timerlat tracer can use user space threads to check for osnoise and timer latency. If the program using this is killed via a SIGTERM, the threads are shutdown one at a time and another tracing instance can start up resetting the threads before they are fully closed. That causes the hrtimer assigned to the kthread to be shutdown and freed twice when the dying thread finally closes the file descriptors, causing a use-after-free bug. Only cancel the hrtimer if the associated thread is still around. Also add the interface_lock around the resetting of the tlat_var->kthread. Note, this is just a quick fix that can be backported to stable. A real fix is to have a better synchronization between the shutdown of old threads and the starting of new ones. Link: https://lore.kernel.org/all/20240820130001.124768-1-tglozar@redhat.com/ Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com> Link: https://lore.kernel.org/20240905085330.45985730@gandalf.local.home Fixes: e88ed227f639e ("tracing/timerlat: Add user-space interface") Reported-by: Tomas Glozar <tglozar@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-05tracing/osnoise: Use a cpumask to know what threads are kthreadsSteven Rostedt
The start_kthread() and stop_thread() code was not always called with the interface_lock held. This means that the kthread variable could be unexpectedly changed causing the kthread_stop() to be called on it when it should not have been, leading to: while true; do rtla timerlat top -u -q & PID=$!; sleep 5; kill -INT $PID; sleep 0.001; kill -TERM $PID; wait $PID; done Causing the following OOPS: Oops: general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 5 UID: 0 PID: 885 Comm: timerlatu/5 Not tainted 6.11.0-rc4-test-00002-gbc754cc76d1b-dirty #125 a533010b71dab205ad2f507188ce8c82203b0254 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:hrtimer_active+0x58/0x300 Code: 48 c1 ee 03 41 54 48 01 d1 48 01 d6 55 53 48 83 ec 20 80 39 00 0f 85 30 02 00 00 49 8b 6f 30 4c 8d 75 10 4c 89 f0 48 c1 e8 03 <0f> b6 3c 10 4c 89 f0 83 e0 07 83 c0 03 40 38 f8 7c 09 40 84 ff 0f RSP: 0018:ffff88811d97f940 EFLAGS: 00010202 RAX: 0000000000000002 RBX: ffff88823c6b5b28 RCX: ffffed10478d6b6b RDX: dffffc0000000000 RSI: ffffed10478d6b6c RDI: ffff88823c6b5b28 RBP: 0000000000000000 R08: ffff88823c6b5b58 R09: ffff88823c6b5b60 R10: ffff88811d97f957 R11: 0000000000000010 R12: 00000000000a801d R13: ffff88810d8b35d8 R14: 0000000000000010 R15: ffff88823c6b5b28 FS: 0000000000000000(0000) GS:ffff88823c680000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000561858ad7258 CR3: 000000007729e001 CR4: 0000000000170ef0 Call Trace: <TASK> ? die_addr+0x40/0xa0 ? exc_general_protection+0x154/0x230 ? asm_exc_general_protection+0x26/0x30 ? hrtimer_active+0x58/0x300 ? __pfx_mutex_lock+0x10/0x10 ? __pfx_locks_remove_file+0x10/0x10 hrtimer_cancel+0x15/0x40 timerlat_fd_release+0x8e/0x1f0 ? security_file_release+0x43/0x80 __fput+0x372/0xb10 task_work_run+0x11e/0x1f0 ? _raw_spin_lock+0x85/0xe0 ? __pfx_task_work_run+0x10/0x10 ? poison_slab_object+0x109/0x170 ? do_exit+0x7a0/0x24b0 do_exit+0x7bd/0x24b0 ? __pfx_migrate_enable+0x10/0x10 ? __pfx_do_exit+0x10/0x10 ? __pfx_read_tsc+0x10/0x10 ? ktime_get+0x64/0x140 ? _raw_spin_lock_irq+0x86/0xe0 do_group_exit+0xb0/0x220 get_signal+0x17ba/0x1b50 ? vfs_read+0x179/0xa40 ? timerlat_fd_read+0x30b/0x9d0 ? __pfx_get_signal+0x10/0x10 ? __pfx_timerlat_fd_read+0x10/0x10 arch_do_signal_or_restart+0x8c/0x570 ? __pfx_arch_do_signal_or_restart+0x10/0x10 ? vfs_read+0x179/0xa40 ? ksys_read+0xfe/0x1d0 ? __pfx_ksys_read+0x10/0x10 syscall_exit_to_user_mode+0xbc/0x130 do_syscall_64+0x74/0x110 ? __pfx___rseq_handle_notify_resume+0x10/0x10 ? __pfx_ksys_read+0x10/0x10 ? fpregs_restore_userregs+0xdb/0x1e0 ? fpregs_restore_userregs+0xdb/0x1e0 ? syscall_exit_to_user_mode+0x116/0x130 ? do_syscall_64+0x74/0x110 ? do_syscall_64+0x74/0x110 ? do_syscall_64+0x74/0x110 entry_SYSCALL_64_after_hwframe+0x71/0x79 RIP: 0033:0x7ff0070eca9c Code: Unable to access opcode bytes at 0x7ff0070eca72. RSP: 002b:00007ff006dff8c0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007ff0070eca9c RDX: 0000000000000400 RSI: 00007ff006dff9a0 RDI: 0000000000000003 RBP: 00007ff006dffde0 R08: 0000000000000000 R09: 00007ff000000ba0 R10: 00007ff007004b08 R11: 0000000000000246 R12: 0000000000000003 R13: 00007ff006dff9a0 R14: 0000000000000007 R15: 0000000000000008 </TASK> Modules linked in: snd_hda_intel snd_intel_dspcfg snd_intel_sdw_acpi snd_hda_codec snd_hwdep snd_hda_core ---[ end trace 0000000000000000 ]--- This is because it would mistakenly call kthread_stop() on a user space thread making it "exit" before it actually exits. Since kthreads are created based on global behavior, use a cpumask to know when kthreads are running and that they need to be shutdown before proceeding to do new work. Link: https://lore.kernel.org/all/20240820130001.124768-1-tglozar@redhat.com/ This was debugged by using the persistent ring buffer: Link: https://lore.kernel.org/all/20240823013902.135036960@goodmis.org/ Note, locking was originally used to fix this, but that proved to cause too many deadlocks to work around: https://lore.kernel.org/linux-trace-kernel/20240823102816.5e55753b@gandalf.local.home/ Cc: stable@vger.kernel.org Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: "Luis Claudio R. Goncalves" <lgoncalv@redhat.com> Link: https://lore.kernel.org/20240904103428.08efdf4c@gandalf.local.home Fixes: e88ed227f639e ("tracing/timerlat: Add user-space interface") Reported-by: Tomas Glozar <tglozar@redhat.com> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
2024-09-05arm64: dts: nuvoton: ma35d1: Add uart pinctrl settingsJacky Huang
Enable all UART nodes presented on som and iot boards, and add pinctrl function settings to these nodes. Signed-off-by: Jacky Huang <ychuang3@nuvoton.com> Link: https://lore.kernel.org/r/20240819035647.306-4-ychuang570808@gmail.com Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-09-05arm64: dts: nuvoton: ma35d1: Add pinctrl and gpio nodesJacky Huang
Added the pinctrl node and its subnodes, the gpioa through gpion nodes, to the MA35D1 device tree. Signed-off-by: Jacky Huang <ychuang3@nuvoton.com> Link: https://lore.kernel.org/r/20240819035647.306-3-ychuang570808@gmail.com Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2024-09-05arm64: dts: nuvoton: Add syscon to the system-management nodeJacky Huang
According to the binding document, add the "syscon" compatible to the system-management node. Signed-off-by: Jacky Huang <ychuang3@nuvoton.com> Link: https://lore.kernel.org/r/20240819035647.306-2-ychuang570808@gmail.com Signed-off-by: Arnd Bergmann <arnd@arndb.de>