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2020-02-26net/smc: check for valid ib_client_dataKarsten Graul
In smc_ib_remove_dev() check if the provided ib device was actually initialized for SMC before. Reported-by: syzbot+84484ccebdd4e5451d91@syzkaller.appspotmail.com Fixes: a4cf0443c414 ("smc: introduce SMC as an IB-client") Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net: qrtr: Fix error pointer vs NULL bugsDan Carpenter
The callers only expect NULL pointers, so returning an error pointer will lead to an Oops. Fixes: 0c2204a4ad71 ("net: qrtr: Migrate nameservice to kernel from userspace") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: add dummy icsk_sync_mss()Paolo Abeni
syzbot noted that the master MPTCP socket lacks the icsk_sync_mss callback, and was able to trigger a null pointer dereference: BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 8e171067 P4D 8e171067 PUD 93fa2067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 8984 Comm: syz-executor066 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc900020b7b80 EFLAGS: 00010246 RAX: 1ffff110124ba600 RBX: 0000000000000000 RCX: ffff88809fefa600 RDX: ffff8880994cdb18 RSI: 0000000000000000 RDI: ffff8880925d3140 RBP: ffffc900020b7bd8 R08: ffffffff870225be R09: fffffbfff140652a R10: fffffbfff140652a R11: 0000000000000000 R12: ffff8880925d35d0 R13: ffff8880925d3140 R14: dffffc0000000000 R15: 1ffff110124ba6ba FS: 0000000001a0b880(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000a6d6f000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cipso_v4_sock_setattr+0x34b/0x470 net/ipv4/cipso_ipv4.c:1888 netlbl_sock_setattr+0x2a7/0x310 net/netlabel/netlabel_kapi.c:989 smack_netlabel security/smack/smack_lsm.c:2425 [inline] smack_inode_setsecurity+0x3da/0x4a0 security/smack/smack_lsm.c:2716 security_inode_setsecurity+0xb2/0x140 security/security.c:1364 __vfs_setxattr_noperm+0x16f/0x3e0 fs/xattr.c:197 vfs_setxattr fs/xattr.c:224 [inline] setxattr+0x335/0x430 fs/xattr.c:451 __do_sys_fsetxattr fs/xattr.c:506 [inline] __se_sys_fsetxattr+0x130/0x1b0 fs/xattr.c:495 __x64_sys_fsetxattr+0xbf/0xd0 fs/xattr.c:495 do_syscall_64+0xf7/0x1c0 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x440199 Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffcadc19e48 EFLAGS: 00000246 ORIG_RAX: 00000000000000be RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440199 RDX: 0000000020000200 RSI: 00000000200001c0 RDI: 0000000000000003 RBP: 00000000006ca018 R08: 0000000000000003 R09: 00000000004002c8 R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000401a20 R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: CR2: 0000000000000000 Address the issue adding a dummy icsk_sync_mss callback. To properly sync the subflows mss and options list we need some additional infrastructure, which will land to net-next. Reported-by: syzbot+f4dfece964792d80b139@syzkaller.appspotmail.com Fixes: 2303f994b3e1 ("mptcp: Associate MPTCP context with TCP socket") Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: defer work schedule until mptcp lock is releasedPaolo Abeni
Don't schedule the work queue right away, instead defer this to the lock release callback. This has the advantage that it will give recv path a chance to complete -- this might have moved all pending packets from the subflow to the mptcp receive queue, which allows to avoid the schedule_work(). Co-developed-by: Florian Westphal <fw@strlen.de> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Paolo Abeni <pabeni@redhat.com> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: avoid work queue scheduling if possibleFlorian Westphal
We can't lock_sock() the mptcp socket from the subflow data_ready callback, it would result in ABBA deadlock with the subflow socket lock. We can however grab the spinlock: if that succeeds and the mptcp socket is not owned at the moment, we can process the new skbs right away without deferring this to the work queue. This avoids the schedule_work and hence the small delay until the work item is processed. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: remove mptcp_read_actorFlorian Westphal
Only used to discard stale data from the subflow, so move it where needed. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: add rmem queue accountingFlorian Westphal
If userspace never drains the receive buffers we must stop draining the subflow socket(s) at some point. This adds the needed rmem accouting for this. If the threshold is reached, we stop draining the subflows. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: update mptcp ack sequence from work queueFlorian Westphal
If userspace is not reading data, all the mptcp-level acks contain the ack_seq from the last time userspace read data rather than the most recent in-sequence value. This causes pointless retransmissions for data that is already queued. The reason for this is that all the mptcp protocol level processing happens at mptcp_recv time. This adds work queue to move skbs from the subflow sockets receive queue on the mptcp socket receive queue (which was not used so far). This allows us to announce the correct mptcp ack sequence in a timely fashion, even when the application does not call recv() on the mptcp socket for some time. We still wake userspace tasks waiting for POLLIN immediately: If the mptcp level receive queue is empty (because the work queue is still pending) it can be filled from in-sequence subflow sockets at recv time without a need to wait for the worker. The skb_orphan when moving skbs from subflow to mptcp level is needed, because the destructor (sock_rfree) relies on skb->sk (ssk!) lock being taken. A followup patch will add needed rmem accouting for the moved skbs. Other problem: In case application behaves as expected, and calls recv() as soon as mptcp socket becomes readable, the work queue will only waste cpu cycles. This will also be addressed in followup patches. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: add work queue skeletonPaolo Abeni
Will be extended with functionality in followup patches. Initial user is moving skbs from subflows receive queue to the mptcp-level receive queue. Signed-off-by: Paolo Abeni <pabeni@redhat.com> Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26mptcp: add and use mptcp_data_ready helperFlorian Westphal
allows us to schedule the work queue to drain the ssk receive queue in a followup patch. This is needed to avoid sending all-to-pessimistic mptcp-level acknowledgements. At this time, the ack_seq is what was last read by userspace instead of the highest in-sequence number queued for reading. Signed-off-by: Florian Westphal <fw@strlen.de> Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26af_llc: fix if-statement empty body warningRandy Dunlap
When debugging via dprintk() is not enabled, make the dprintk() macro be an empty do-while loop, as is done in <linux/sunrpc/debug.h>. This fixes a gcc warning when -Wextra is set: ../net/llc/af_llc.c:974:51: warning: suggest braces around empty body in an ‘if’ statement [-Wempty-body] I have verified that there is not object code change (with gcc 7.5.0). Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: netdev@vger.kernel.org Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net/smc: improve peer ID in CLC decline for SMC-RHans Wippel
According to RFC 7609, all CLC messages contain a peer ID that consists of a unique instance ID and the MAC address of one of the host's RoCE devices. But if a SMC-R connection cannot be established, e.g., because no matching pnet table entry is found, the current implementation uses a zero value in the CLC decline message although the host's peer ID is set to a proper value. If no RoCE and no ISM device is usable for a connection, there is no LGR and the LGR check in smc_clc_send_decline() prevents that the peer ID is copied into the CLC decline message for both SMC-D and SMC-R. So, this patch modifies the check to also accept the case of no LGR. Also, only a valid peer ID is copied into the decline message. Signed-off-by: Hans Wippel <ndev@hwipl.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net/smc: rework peer ID handlingHans Wippel
This patch initializes the peer ID to a random instance ID and a zero MAC address. If a RoCE device is in the host, the MAC address part of the peer ID is overwritten with the respective address. Also, a function for checking if the peer ID is valid is added. A peer ID is considered valid if the MAC address part contains a non-zero MAC address. Signed-off-by: Hans Wippel <ndev@hwipl.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26tcp-zerocopy: Update returned getsockopt() optlen.Arjun Roy
TCP receive zerocopy currently does not update the returned optlen for getsockopt() if the user passed in a larger than expected value. Thus, userspace cannot properly determine if all the fields are set in the passed-in struct. This patch sets the optlen for this case before returning, in keeping with the expected operation of getsockopt(). Fixes: c8856c051454 ("tcp-zerocopy: Return inq along with tcp receive zerocopy.") Signed-off-by: Arjun Roy <arjunroy@google.com> Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26ipv6: restrict IPV6_ADDRFORM operationEric Dumazet
IPV6_ADDRFORM is able to transform IPv6 socket to IPv4 one. While this operation sounds illogical, we have to support it. One of the things it does for TCP socket is to switch sk->sk_prot to tcp_prot. We now have other layers playing with sk->sk_prot, so we should make sure to not interfere with them. This patch makes sure sk_prot is the default pointer for TCP IPv6 socket. syzbot reported : BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD a0113067 P4D a0113067 PUD a8771067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 10686 Comm: syz-executor.0 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246 RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40 RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5 R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098 R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000 FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: inet_release+0x165/0x1c0 net/ipv4/af_inet.c:427 __sock_release net/socket.c:605 [inline] sock_close+0xe1/0x260 net/socket.c:1283 __fput+0x2e4/0x740 fs/file_table.c:280 ____fput+0x15/0x20 fs/file_table.c:313 task_work_run+0x176/0x1b0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:188 [inline] exit_to_usermode_loop arch/x86/entry/common.c:164 [inline] prepare_exit_to_usermode+0x480/0x5b0 arch/x86/entry/common.c:195 syscall_return_slowpath+0x113/0x4a0 arch/x86/entry/common.c:278 do_syscall_64+0x11f/0x1c0 arch/x86/entry/common.c:304 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c429 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f2ae75dac78 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: 0000000000000000 RBX: 00007f2ae75db6d4 RCX: 000000000045c429 RDX: 0000000000000001 RSI: 000000000000011a RDI: 0000000000000004 RBP: 000000000076bf20 R08: 0000000000000038 R09: 0000000000000000 R10: 0000000020000180 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000a9d R14: 00000000004ccfb4 R15: 000000000076bf2c Modules linked in: CR2: 0000000000000000 ---[ end trace 82567b5207e87bae ]--- RIP: 0010:0x0 Code: Bad RIP value. RSP: 0018:ffffc9000281fce0 EFLAGS: 00010246 RAX: 1ffffffff15f48ac RBX: ffffffff8afa4560 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880a69a8f40 RBP: ffffc9000281fd10 R08: ffffffff86ed9b0c R09: ffffed1014d351f5 R10: ffffed1014d351f5 R11: 0000000000000000 R12: ffff8880920d3098 R13: 1ffff1101241a613 R14: ffff8880a69a8f40 R15: 0000000000000000 FS: 00007f2ae75db700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000a3b85000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Fixes: 604326b41a6f ("bpf, sockmap: convert to generic sk_msg interface") Signed-off-by: Eric Dumazet <edumazet@google.com> Reported-by: syzbot+1938db17e275e85dc328@syzkaller.appspotmail.com Cc: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net/smc: fix cleanup for linkgroup setup failuresUrsula Braun
If an SMC connection to a certain peer is setup the first time, a new linkgroup is created. In case of setup failures, such a linkgroup is unusable and should disappear. As a first step the linkgroup is removed from the linkgroup list in smc_lgr_forget(). There are 2 problems: smc_listen_decline() might be called before linkgroup creation resulting in a crash due to calling smc_lgr_forget() with parameter NULL. If a setup failure occurs after linkgroup creation, the connection is never unregistered from the linkgroup, preventing linkgroup freeing. This patch introduces an enhanced smc_lgr_cleanup_early() function which * contains a linkgroup check for early smc_listen_decline() invocations * invokes smc_conn_free() to guarantee unregistering of the connection. * schedules fast linkgroup removal of the unusable linkgroup And the unused function smcd_conn_free() is removed from smc_core.h. Fixes: 3b2dec2603d5b ("net/smc: restructure client and server code in af_smc") Fixes: 2a0674fffb6bc ("net/smc: improve abnormal termination of link groups") Signed-off-by: Ursula Braun <ubraun@linux.ibm.com> Signed-off-by: Karsten Graul <kgraul@linux.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net: fix sysfs permssions when device changes network namespaceChristian Brauner
Now that we moved all the helpers in place and make use netdev_change_owner() to fixup the permissions when moving network devices between network namespaces. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net-sysfs: add queue_change_owner()Christian Brauner
Add a function to change the owner of the queue entries for a network device when it is moved between network namespaces. Currently, when moving network devices between network namespaces the ownership of the corresponding queue sysfs entries are not changed. This leads to problems when tools try to operate on the corresponding sysfs files. Fix this. Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net-sysfs: add netdev_change_owner()Christian Brauner
Add a function to change the owner of a network device when it is moved between network namespaces. Currently, when moving network devices between network namespaces the ownership of the corresponding sysfs entries is not changed. This leads to problems when tools try to operate on the corresponding sysfs files. This leads to a bug whereby a network device that is created in a network namespaces owned by a user namespace will have its corresponding sysfs entry owned by the root user of the corresponding user namespace. If such a network device has to be moved back to the host network namespace the permissions will still be set to the user namespaces. This means unprivileged users can e.g. trigger uevents for such incorrectly owned devices. They can also modify the settings of the device itself. Both of these things are unwanted. For example, workloads will create network devices in the host network namespace. Other tools will then proceed to move such devices between network namespaces owner by other user namespaces. While the ownership of the device itself is updated in net/core/net-sysfs.c:dev_change_net_namespace() the corresponding sysfs entry for the device is not: drwxr-xr-x 5 nobody nobody 0 Jan 25 18:08 . drwxr-xr-x 9 nobody nobody 0 Jan 25 18:08 .. -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 addr_assign_type -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 addr_len -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 address -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 broadcast -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 carrier -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 carrier_changes -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 carrier_down_count -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 carrier_up_count -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 dev_id -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 dev_port -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 dormant -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 duplex -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 flags -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 gro_flush_timeout -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 ifalias -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 ifindex -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 iflink -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 link_mode -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 mtu -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 name_assign_type -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 netdev_group -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 operstate -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 phys_port_id -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 phys_port_name -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 phys_switch_id drwxr-xr-x 2 nobody nobody 0 Jan 25 18:09 power -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 proto_down drwxr-xr-x 4 nobody nobody 0 Jan 25 18:09 queues -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 speed drwxr-xr-x 2 nobody nobody 0 Jan 25 18:09 statistics lrwxrwxrwx 1 nobody nobody 0 Jan 25 18:08 subsystem -> ../../../../class/net -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:09 tx_queue_len -r--r--r-- 1 nobody nobody 4096 Jan 25 18:09 type -rw-r--r-- 1 nobody nobody 4096 Jan 25 18:08 uevent However, if a device is created directly in the network namespace then the device's sysfs permissions will be correctly updated: drwxr-xr-x 5 root root 0 Jan 25 18:12 . drwxr-xr-x 9 nobody nobody 0 Jan 25 18:08 .. -r--r--r-- 1 root root 4096 Jan 25 18:12 addr_assign_type -r--r--r-- 1 root root 4096 Jan 25 18:12 addr_len -r--r--r-- 1 root root 4096 Jan 25 18:12 address -r--r--r-- 1 root root 4096 Jan 25 18:12 broadcast -rw-r--r-- 1 root root 4096 Jan 25 18:12 carrier -r--r--r-- 1 root root 4096 Jan 25 18:12 carrier_changes -r--r--r-- 1 root root 4096 Jan 25 18:12 carrier_down_count -r--r--r-- 1 root root 4096 Jan 25 18:12 carrier_up_count -r--r--r-- 1 root root 4096 Jan 25 18:12 dev_id -r--r--r-- 1 root root 4096 Jan 25 18:12 dev_port -r--r--r-- 1 root root 4096 Jan 25 18:12 dormant -r--r--r-- 1 root root 4096 Jan 25 18:12 duplex -rw-r--r-- 1 root root 4096 Jan 25 18:12 flags -rw-r--r-- 1 root root 4096 Jan 25 18:12 gro_flush_timeout -rw-r--r-- 1 root root 4096 Jan 25 18:12 ifalias -r--r--r-- 1 root root 4096 Jan 25 18:12 ifindex -r--r--r-- 1 root root 4096 Jan 25 18:12 iflink -r--r--r-- 1 root root 4096 Jan 25 18:12 link_mode -rw-r--r-- 1 root root 4096 Jan 25 18:12 mtu -r--r--r-- 1 root root 4096 Jan 25 18:12 name_assign_type -rw-r--r-- 1 root root 4096 Jan 25 18:12 netdev_group -r--r--r-- 1 root root 4096 Jan 25 18:12 operstate -r--r--r-- 1 root root 4096 Jan 25 18:12 phys_port_id -r--r--r-- 1 root root 4096 Jan 25 18:12 phys_port_name -r--r--r-- 1 root root 4096 Jan 25 18:12 phys_switch_id drwxr-xr-x 2 root root 0 Jan 25 18:12 power -rw-r--r-- 1 root root 4096 Jan 25 18:12 proto_down drwxr-xr-x 4 root root 0 Jan 25 18:12 queues -r--r--r-- 1 root root 4096 Jan 25 18:12 speed drwxr-xr-x 2 root root 0 Jan 25 18:12 statistics lrwxrwxrwx 1 nobody nobody 0 Jan 25 18:12 subsystem -> ../../../../class/net -rw-r--r-- 1 root root 4096 Jan 25 18:12 tx_queue_len -r--r--r-- 1 root root 4096 Jan 25 18:12 type -rw-r--r-- 1 root root 4096 Jan 25 18:12 uevent Now, when creating a network device in a network namespace owned by a user namespace and moving it to the host the permissions will be set to the id that the user namespace root user has been mapped to on the host leading to all sorts of permission issues: 458752 drwxr-xr-x 5 458752 458752 0 Jan 25 18:12 . drwxr-xr-x 9 root root 0 Jan 25 18:08 .. -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 addr_assign_type -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 addr_len -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 address -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 broadcast -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 carrier -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 carrier_changes -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 carrier_down_count -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 carrier_up_count -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 dev_id -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 dev_port -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 dormant -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 duplex -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 flags -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 gro_flush_timeout -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 ifalias -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 ifindex -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 iflink -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 link_mode -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 mtu -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 name_assign_type -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 netdev_group -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 operstate -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 phys_port_id -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 phys_port_name -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 phys_switch_id drwxr-xr-x 2 458752 458752 0 Jan 25 18:12 power -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 proto_down drwxr-xr-x 4 458752 458752 0 Jan 25 18:12 queues -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 speed drwxr-xr-x 2 458752 458752 0 Jan 25 18:12 statistics lrwxrwxrwx 1 root root 0 Jan 25 18:12 subsystem -> ../../../../class/net -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 tx_queue_len -r--r--r-- 1 458752 458752 4096 Jan 25 18:12 type -rw-r--r-- 1 458752 458752 4096 Jan 25 18:12 uevent Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26sched: act: count in the size of action flags bitfieldJiri Pirko
The put of the flags was added by the commit referenced in fixes tag, however the size of the message was not extended accordingly. Fix this by adding size of the flags bitfield to the message size. Fixes: e38226786022 ("net: sched: update action implementations to support flags") Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net: core: devlink.c: Use built-in RCU list checkingMadhuparna Bhowmik
list_for_each_entry_rcu() has built-in RCU and lock checking. Pass cond argument to list_for_each_entry_rcu() to silence false lockdep warning when CONFIG_PROVE_RCU_LIST is enabled. The devlink->lock is held when devlink_dpipe_table_find() is called in non RCU read side section. Therefore, pass struct devlink to devlink_dpipe_table_find() for lockdep checking. Signed-off-by: Madhuparna Bhowmik <madhuparnabhowmik10@gmail.com> Reviewed-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nfDavid S. Miller
Pablo Neira Ayuso says: ==================== Netfilter fixes for net The following patchset contains Netfilter fixes: 1) Perform garbage collection from workqueue to fix rcu detected stall in ipset hash set types, from Jozsef Kadlecsik. 2) Fix the forceadd evaluation path, also from Jozsef. 3) Fix nft_set_pipapo selftest, from Stefano Brivio. 4) Crash when add-flush-add element in pipapo set, also from Stefano. Add test to cover this crash. 5) Remove sysctl entry under mutex in hashlimit, from Cong Wang. ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26netfilter: xt_hashlimit: unregister proc file before releasing mutexCong Wang
Before releasing the global mutex, we only unlink the hashtable from the hash list, its proc file is still not unregistered at this point. So syzbot could trigger a race condition where a parallel htable_create() could register the same file immediately after the mutex is released. Move htable_remove_proc_entry() back to mutex protection to fix this. And, fold htable_destroy() into htable_put() to make the code slightly easier to understand. Reported-and-tested-by: syzbot+d195fd3b9a364ddd6731@syzkaller.appspotmail.com Fixes: c4a3922d2d20 ("netfilter: xt_hashlimit: reduce hashlimit_mutex scope for htable_put()") Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-02-26ethtool: limit bitset sizeMichal Kubecek
Syzbot reported that ethnl_compact_sanity_checks() can be tricked into reading past the end of ETHTOOL_A_BITSET_VALUE and ETHTOOL_A_BITSET_MASK attributes and even the message by passing a value between (u32)(-31) and (u32)(-1) as ETHTOOL_A_BITSET_SIZE. The problem is that DIV_ROUND_UP(attr_nbits, 32) is 0 for such values so that zero length ETHTOOL_A_BITSET_VALUE will pass the length check but ethnl_bitmap32_not_zero() check would try to access up to 512 MB of attribute "payload". Prevent this overflow byt limiting the bitset size. Technically, compact bitset format would allow bitset sizes up to almost 2^18 (so that the nest size does not exceed U16_MAX) but bitsets used by ethtool are much shorter. S16_MAX, the largest value which can be directly used as an upper limit in policy, should be a reasonable compromise. Fixes: 10b518d4e6dd ("ethtool: netlink bitset handling") Reported-by: syzbot+7fd4ed5b4234ab1fdccd@syzkaller.appspotmail.com Reported-by: syzbot+709b7a64d57978247e44@syzkaller.appspotmail.com Reported-by: syzbot+983cb8fb2d17a7af549d@syzkaller.appspotmail.com Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26net: Fix Tx hash bound checkingAmritha Nambiar
Fixes the lower and upper bounds when there are multiple TCs and traffic is on the the same TC on the same device. The lower bound is represented by 'qoffset' and the upper limit for hash value is 'qcount + qoffset'. This gives a clean Rx to Tx queue mapping when there are multiple TCs, as the queue indices for upper TCs will be offset by 'qoffset'. v2: Fixed commit description based on comments. Fixes: 1b837d489e06 ("net: Revoke export for __skb_tx_hash, update it to just be static skb_tx_hash") Fixes: eadec877ce9c ("net: Add support for subordinate traffic classes to netdev_pick_tx") Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com> Reviewed-by: Alexander Duyck <alexander.h.duyck@linux.intel.com> Reviewed-by: Sridhar Samudrala <sridhar.samudrala@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-26nft_set_pipapo: Actually fetch key data in nft_pipapo_remove()Stefano Brivio
Phil reports that adding elements, flushing and re-adding them right away: nft add table t '{ set s { type ipv4_addr . inet_service; flags interval; }; }' nft add element t s '{ 10.0.0.1 . 22-25, 10.0.0.1 . 10-20 }' nft flush set t s nft add element t s '{ 10.0.0.1 . 10-20, 10.0.0.1 . 22-25 }' triggers, almost reliably, a crash like this one: [ 71.319848] general protection fault, probably for non-canonical address 0x6f6b6e696c2e756e: 0000 [#1] PREEMPT SMP PTI [ 71.321540] CPU: 3 PID: 1201 Comm: kworker/3:2 Not tainted 5.6.0-rc1-00377-g2bb07f4e1d861 #192 [ 71.322746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190711_202441-buildvm-armv7-10.arm.fedoraproject.org-2.fc31 04/01/2014 [ 71.324430] Workqueue: events nf_tables_trans_destroy_work [nf_tables] [ 71.325387] RIP: 0010:nft_set_elem_destroy+0xa5/0x110 [nf_tables] [ 71.326164] Code: 89 d4 84 c0 74 0e 8b 77 44 0f b6 f8 48 01 df e8 41 ff ff ff 45 84 e4 74 36 44 0f b6 63 08 45 84 e4 74 2c 49 01 dc 49 8b 04 24 <48> 8b 40 38 48 85 c0 74 4f 48 89 e7 4c 8b [ 71.328423] RSP: 0018:ffffc9000226fd90 EFLAGS: 00010282 [ 71.329225] RAX: 6f6b6e696c2e756e RBX: ffff88813ab79f60 RCX: ffff88813931b5a0 [ 71.330365] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88813ab79f9a [ 71.331473] RBP: ffff88813ab79f60 R08: 0000000000000008 R09: 0000000000000000 [ 71.332627] R10: 000000000000021c R11: 0000000000000000 R12: ffff88813ab79fc2 [ 71.333615] R13: ffff88813b3adf50 R14: dead000000000100 R15: ffff88813931b8a0 [ 71.334596] FS: 0000000000000000(0000) GS:ffff88813bd80000(0000) knlGS:0000000000000000 [ 71.335780] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.336577] CR2: 000055ac683710f0 CR3: 000000013a222003 CR4: 0000000000360ee0 [ 71.337533] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.338557] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.339718] Call Trace: [ 71.340093] nft_pipapo_destroy+0x7a/0x170 [nf_tables_set] [ 71.340973] nft_set_destroy+0x20/0x50 [nf_tables] [ 71.341879] nf_tables_trans_destroy_work+0x246/0x260 [nf_tables] [ 71.342916] process_one_work+0x1d5/0x3c0 [ 71.343601] worker_thread+0x4a/0x3c0 [ 71.344229] kthread+0xfb/0x130 [ 71.344780] ? process_one_work+0x3c0/0x3c0 [ 71.345477] ? kthread_park+0x90/0x90 [ 71.346129] ret_from_fork+0x35/0x40 [ 71.346748] Modules linked in: nf_tables_set nf_tables nfnetlink 8021q [last unloaded: nfnetlink] [ 71.348153] ---[ end trace 2eaa8149ca759bcc ]--- [ 71.349066] RIP: 0010:nft_set_elem_destroy+0xa5/0x110 [nf_tables] [ 71.350016] Code: 89 d4 84 c0 74 0e 8b 77 44 0f b6 f8 48 01 df e8 41 ff ff ff 45 84 e4 74 36 44 0f b6 63 08 45 84 e4 74 2c 49 01 dc 49 8b 04 24 <48> 8b 40 38 48 85 c0 74 4f 48 89 e7 4c 8b [ 71.350017] RSP: 0018:ffffc9000226fd90 EFLAGS: 00010282 [ 71.350019] RAX: 6f6b6e696c2e756e RBX: ffff88813ab79f60 RCX: ffff88813931b5a0 [ 71.350019] RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff88813ab79f9a [ 71.350020] RBP: ffff88813ab79f60 R08: 0000000000000008 R09: 0000000000000000 [ 71.350021] R10: 000000000000021c R11: 0000000000000000 R12: ffff88813ab79fc2 [ 71.350022] R13: ffff88813b3adf50 R14: dead000000000100 R15: ffff88813931b8a0 [ 71.350025] FS: 0000000000000000(0000) GS:ffff88813bd80000(0000) knlGS:0000000000000000 [ 71.350026] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.350027] CR2: 000055ac683710f0 CR3: 000000013a222003 CR4: 0000000000360ee0 [ 71.350028] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 71.350028] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 71.350030] Kernel panic - not syncing: Fatal exception [ 71.350412] Kernel Offset: disabled [ 71.365922] ---[ end Kernel panic - not syncing: Fatal exception ]--- which is caused by dangling elements that have been deactivated, but never removed. On a flush operation, nft_pipapo_walk() walks through all the elements in the mapping table, which are then deactivated by nft_flush_set(), one by one, and added to the commit list for removal. Element data is then freed. On transaction commit, nft_pipapo_remove() is called, and failed to remove these elements, leading to the stale references in the mapping. The first symptom of this, revealed by KASan, is a one-byte use-after-free in subsequent calls to nft_pipapo_walk(), which is usually not enough to trigger a panic. When stale elements are used more heavily, though, such as double-free via nft_pipapo_destroy() as in Phil's case, the problem becomes more noticeable. The issue comes from that fact that, on a flush operation, nft_pipapo_remove() won't get the actual key data via elem->key, elements to be deleted upon commit won't be found by the lookup via pipapo_get(), and removal will be skipped. Key data should be fetched via nft_set_ext_key(), instead. Reported-by: Phil Sutter <phil@nwl.cc> Fixes: 3c4287f62044 ("nf_tables: Add set type for arbitrary concatenation of ranges") Signed-off-by: Stefano Brivio <sbrivio@redhat.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-02-26Merge branch 'master' of git://blackhole.kfki.hu/nfPablo Neira Ayuso
Jozsef Kadlecsik says: ==================== ipset patches for nf The first one is larger than usual, but the issue could not be solved simpler. Also, it's a resend of the patch I submitted a few days ago, with a one line fix on top of that: the size of the comment extensions was not taken into account at reporting the full size of the set. - Fix "INFO: rcu detected stall in hash_xxx" reports of syzbot by introducing region locking and using workqueue instead of timer based gc of timed out entries in hash types of sets in ipset. - Fix the forceadd evaluation path - the bug was also uncovered by the syzbot. ==================== Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2020-02-25devlink: extend devlink_trap_report() to accept cookie and passJiri Pirko
Add cookie argument to devlink_trap_report() allowing driver to pass in the user cookie. Pass on the cookie down to drop monitor code. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-25drop_monitor: extend by passing cookie from driverJiri Pirko
If driver passed along the cookie, push it through Netlink. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-25devlink: add trap metadata type for cookieJiri Pirko
Allow driver to indicate cookie metadata for registered traps. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-25flow_offload: pass action cookie through offload structuresJiri Pirko
Extend struct flow_action_entry in order to hold TC action cookie specified by user inserting the action. Signed-off-by: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Reviewed-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24bpf/tests: Use migrate disable instead of preempt disableDavid Miller
Replace the preemption disable/enable with migrate_disable/enable() to reflect the actual requirement and to allow PREEMPT_RT to substitute it with an actual migration disable mechanism which does not disable preemption. [ tglx: Switched it over to migrate disable ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200224145643.785306549@linutronix.de
2020-02-24bpf: Use bpf_prog_run_pin_on_cpu() at simple call sites.David Miller
All of these cases are strictly of the form: preempt_disable(); BPF_PROG_RUN(...); preempt_enable(); Replace this with bpf_prog_run_pin_on_cpu() which wraps BPF_PROG_RUN() with: migrate_disable(); BPF_PROG_RUN(...); migrate_enable(); On non RT enabled kernels this maps to preempt_disable/enable() and on RT enabled kernels this solely prevents migration, which is sufficient as there is no requirement to prevent reentrancy to any BPF program from a preempting task. The only requirement is that the program stays on the same CPU. Therefore, this is a trivially correct transformation. The seccomp loop does not need protection over the loop. It only needs protection per BPF filter program [ tglx: Converted to bpf_prog_run_pin_on_cpu() ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200224145643.691493094@linutronix.de
2020-02-24Merge tag 'mac80211-for-net-2020-02-24' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211 Johannes Berg ==================== A few fixes: * remove a double mutex-unlock * fix a leak in an error path * NULL pointer check * include if_vlan.h where needed * avoid RCU list traversal when not under RCU ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24Merge tag 'mac80211-next-for-net-next-2020-02-24' of ↵David S. Miller
git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next Johannes Berg says: ==================== A new set of changes: * lots of small documentation fixes, from Jérôme Pouiller * beacon protection (BIGTK) support from Jouni Malinen * some initial code for TID configuration, from Tamizh chelvam * I reverted some new API before it's actually used, because it's wrong to mix controlled port and preauth * a few other cleanups/fixes ==================== Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: qrtr: fix spelling mistake "serivce" -> "service"Colin Ian King
There is a spelling mistake in a pr_err message. Fix it. Signed-off-by: Colin Ian King <colin.king@canonical.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: UDP tunnel encapsulation module for tunnelling different protocols like ↵Martin Varghese
MPLS, IP, NSH etc. The Bareudp tunnel module provides a generic L3 encapsulation tunnelling module for tunnelling different protocols like MPLS, IP,NSH etc inside a UDP tunnel. Signed-off-by: Martin Varghese <martin.varghese@nokia.com> Acked-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24af_unix: Add missing annotation for unix_wait_for_peer()Jules Irenge
Sparse reports a warning unix_wait_for_peer() warning: context imbalance in unix_wait_for_peer() - unexpected unlock The root cause is the missing annotation at unix_wait_for_peer() Add the missing annotation __releases(&unix_sk(other)->lock) Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24dccp: Add missing annotation for dccp_child_process()Jules Irenge
Sparse reports a warning at dccp_child_process() warning: context imbalance in dccp_child_process() - unexpected unlock The root cause is the missing annotation at dccp_child_process() Add the missing __releases(child) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: netrom: Add missing annotation for nr_neigh_stop()Jules Irenge
Sparse reports a warning at nr_neigh_stop() warning: context imbalance in nr_neigh_stop() - unexpected unlock The root cause is the missing annotation at nr_neigh_stop() Add the missing __releases(&nr_neigh_list_lock) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: netrom: Add missing annotation for nr_neigh_start()Jules Irenge
Sparse reports a warning at nr_neigh_start() warning: context imbalance in nr_neigh_start() - wrong count at exit The root cause is the missing annotation at nr_neigh_start() Add the missing __acquires(&nr_neigh_list_lock) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: netrom: Add missing annotation for nr_node_stop()Jules Irenge
Sparse reports a warning at nr_node_stop() warning: context imbalance in nr_node_stop() - wrong count at exit The root cause is the missing annotation at nr_node_stop() Add the missing __releases(&nr_node_list_lock) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: netrom: Add missing annotation for nr_node_start()Jules Irenge
Sparse reports a warning at nr_node_start() warning: context imbalance in nr_node_start() - wrong count at exit The root cause is the missing annotation at nr_node_start() Add the missing __acquires(&nr_node_list_lock) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24netrom: Add missing annotation for nr_info_stop()Jules Irenge
Sparse reports a warning at nr_info_stop() warning: context imbalance in nr_info_stop() - unexpected unlock The root cause is the missing annotation at nr_info_stop() Add the missing __releases(&nr_list_lock) Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24netrom: Add missing annotation for nr_info_start()Jules Irenge
Sparse reports a warning at nr_info_start() warning: context imbalance in nr_info_start() - wrong count at exit The root cause is the missing annotation at nr_info_start() Add the missing __acquires(&nr_list_lock) Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24net: Add missing annotation for llc_seq_start()Jules Irenge
Sparse reports a warning at llc_seq_start() warning: context imbalance in llc_seq_start() - wrong count at exit The root cause is the msiing annotation at llc_seq_start() Add the missing __acquires(RCU) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24sctp: Add missing annotation for sctp_transport_walk_stop()Jules Irenge
Sparse reports a warning at sctp_transport_walk_stop() warning: context imbalance in sctp_transport_walk_stop - wrong count at exit The root cause is the missing annotation at sctp_transport_walk_stop() Add the missing __releases(RCU) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24sctp: Add missing annotation for sctp_transport_walk_start()Jules Irenge
Sparse reports a warning at sctp_transport_walk_start() warning: context imbalance in sctp_transport_walk_start - wrong count at exit The root cause is the missing annotation at sctp_transport_walk_start() Add the missing __acquires(RCU) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24sctp: Add missing annotation for sctp_err_finish()Jules Irenge
Sparse reports a warning at sctp_err_finish() warning: context imbalance in sctp_err_finish() - unexpected unlock The root cause is a missing annotation at sctp_err_finish() Add the missing __releases(&((__sk)->sk_lock.slock)) annotation Signed-off-by: Jules Irenge <jbi.octave@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-24ip6mr: Fix RCU list debugging warningAmol Grover
ip6mr_for_each_table() macro uses list_for_each_entry_rcu() for traversing outside an RCU read side critical section but under the protection of rtnl_mutex. Hence add the corresponding lockdep expression to silence the following false-positive warnings: [ 4.319479] ============================= [ 4.319480] WARNING: suspicious RCU usage [ 4.319482] 5.5.4-stable #17 Tainted: G E [ 4.319483] ----------------------------- [ 4.319485] net/ipv6/ip6mr.c:1243 RCU-list traversed in non-reader section!! [ 4.456831] ============================= [ 4.456832] WARNING: suspicious RCU usage [ 4.456834] 5.5.4-stable #17 Tainted: G E [ 4.456835] ----------------------------- [ 4.456837] net/ipv6/ip6mr.c:1582 RCU-list traversed in non-reader section!! Signed-off-by: Amol Grover <frextrite@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
generated by cgit (git 2.34.1) at 2025-03-28 02:33:44 +0000