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2019-07-01btrfs: remove the incorrect comment on RO fs when btrfs_run_delalloc_range() ↵Qu Wenruo
fails At the context of btrfs_run_delalloc_range(), we haven't started/joined a transaction, thus even something went wrong, we can't and won't abort transaction, thus no way to make the fs RO. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: extent-tree: Add trace events for space info numbers updateQu Wenruo
Add trace event for update_bytes_pinned() and update_bytes_may_use() to detect underflow better. The output would be something like (only showing data part): ## Buffered write start, 16K total ## 2255.954 xfs_io/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=4096 2257.169 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=4096 diff=4096 2257.346 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=8192 diff=4096 2257.542 sudo/860 btrfs:update_bytes_may_use:(nil)U: type=DATA old=12288 diff=4096 ## Delalloc start ## 3727.853 kworker/u8:3-e/700 btrfs:update_bytes_may_use:(nil)U: type=DATA old=16384 diff=-16384 ## Space cache update ## 3733.132 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=65536 3733.169 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=65536 diff=-65536 3739.868 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=0 diff=65536 3739.891 sudo/862 btrfs:update_bytes_may_use:(nil)U: type=DATA old=65536 diff=-65536 These two trace events will allow bcc tool to probe btrfs_space_info changes and detect underflow with more details (e.g. backtrace for each update). Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: extent-tree: Add lockdep assert when updating space infoQu Wenruo
Just add a safe net for btrfs_space_info member updating. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: read number of data stripes from map only onceDavid Sterba
There are several places that call nr_data_stripes, but this value does not change. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: constify map parameter for nr_parity_stripes and nr_data_stripesDavid Sterba
Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: refactor helper for bg flags to name conversionDavid Sterba
The helper lacks the btrfs_ prefix and the parameter is the raw blockgroup type, so none of the callers has to do the flags -> index conversion. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: factor out devs_max setting in __btrfs_alloc_chunkDavid Sterba
Merge the repeated code before the if-else block. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use u8 for raid_array membersDavid Sterba
The raid_attr table is now 7 * 56 = 392 bytes long, consisting of just small numbers so we don't have to use ints. New size is 7 * 32 = 224, saving 3 cachelines. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: factor out helper for counting data stripesDavid Sterba
Factor the sequence of ifs to a helper, the 'data stripes' here means the number of stripes without redundancy and parity. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use raid_attr table for btrfs_bg_type_to_factorDavid Sterba
The factor is the number of copies. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use raid_attr table to find profiles for integrity loweringDavid Sterba
Replace open coded list of the profiles by selecting them from the raid_attr table. The criteria are now more explicit, we need profiles that have more than 1 copy of the data or can reconstruct the data with a missing device. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use raid_attr to get allowed profiles for balance conversionDavid Sterba
Iterate over the table and gather all allowed profiles for a given number of devices, instead of open coding. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use raid_attr in btrfs_chunk_max_errorsDavid Sterba
The number of tolerated failures is stored in the raid_attr table, use it. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: use raid_attr table in get_profile_num_devsDavid Sterba
The dev_max constraints are defined in the raid_attr table, use it instead of open-coding it. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: remove mapping tree structures indirectionDavid Sterba
fs_info::mapping_tree is the physical<->logical mapping tree and uses the same underlying structure as extents, but is embedded to another structure. There are no other members and this indirection is useless. No functional change. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: raid56: allow the exact minimum number of devices for balance convertDavid Sterba
The minimum number of devices for RAID5 is 2, though this is only a bit expensive RAID1, and for RAID6 it's 3, which is a triple copy that works only 3 devices. mkfs.btrfs allows that and mounting such filesystem also works, so the conversion via balance filters is inconsistent with the others and we should not prevent it. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: fix minimum number of chunk errors for DUPDavid Sterba
The list of profiles in btrfs_chunk_max_errors lists DUP as a profile DUP able to tolerate 1 device missing. Though this profile is special with 2 copies, it still needs the device, unlike the others. Looking at the history of changes, thre's no clear reason why DUP is there, functions were refactored and blocks of code merged to one helper. d20983b40e828 Btrfs: fix writing data into the seed filesystem - factor code to a helper de11cc12df173 Btrfs: don't pre-allocate btrfs bio - unrelated change, DUP still in the list with max errors 1 a236aed14ccb0 Btrfs: Deal with failed writes in mirrored configurations - introduced the max errors, leaves DUP and RAID1 in the same group Reviewed-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01Btrfs: remove unused variables in __btrfs_unlink_inodeLiu Bo
This code was first introduced in 5f39d397dfbe ("Btrfs: Create extent_buffer interface for large blocksizes") and the function was named btrfs_unlink_trans. It later got renamed to __btrfs_unlink_inode and finally commit 16cdcec736cd ("btrfs: implement delayed inode items operation") changed the way inodes are deleted and obviated the need for those two members. Signed-off-by: Liu Bo <bo.liu@linux.alibaba.com> Reviewed-by: David Sterba <dsterba@suse.com> [ replace changelog by Nikolay's version ] Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Remove unused variable mode in btrfs_mountGoldwyn Rodrigues
This is a leftover from 312c89fbca06 ("btrfs: cleanup btrfs_mount() using btrfs_mount_root()"), the mode was used for opening devices that's not done here anymore. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: switch order of unlocks of space_info and bg in do_trimming()Su Yue
In function do_trimming(), block_group->lock should be unlocked first, as the locks should be released in the reverse order. This does not cause problems but should follow the best practices. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com> Reviewed-by: David Sterba <dsterba@suse.com> [ update changelog ] Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: tree-checker: Check if the file extent end overflowsQu Wenruo
Under certain conditions, we could have strange file extent item in log tree like: item 18 key (69599 108 397312) itemoff 15208 itemsize 53 extent data disk bytenr 0 nr 0 extent data offset 0 nr 18446744073709547520 ram 18446744073709547520 The num_bytes + ram_bytes overflow 64 bit type. For num_bytes part, we can detect such overflow along with file offset (key->offset), as file_offset + num_bytes should never go beyond u64. For ram_bytes part, it's about the decompressed size of the extent, not directly related to the size. In theory it is OK to have a large value, and put extra limitation on RAM bytes may cause unexpected false alerts. So in tree-checker, we only check if the file offset and num bytes overflow. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Remove redundant assignment of tgt_device->commit_total_bytesNikolay Borisov
This is already done in btrfs_init_dev_replace_tgtdev which is the first phase of device replace, called before doing scrub. During that time exclusive lock is held. Additionally btrfs_fs_device::commit_total_bytes is always set based on the size of the underlying block device which shouldn't change once set. This makes the 2nd assignment of the variable in the finishing phase redundant. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Explicitly reserve space for devreplace itemNikolay Borisov
Part of device replace involves writing an item to the device root containing information about pending replace operations. Currently space for this item is not being explicitly reserved so this works thanks to presence of global reserve. While not fatal it's not a good practice. Let's be explicit about space requirement of device replace and reserve space when starting the transaction. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Streamline replace sem unlock in btrfs_dev_replace_startNikolay Borisov
There are only 2 branches which goto leave label with need_unlock set to true. Essentially need_unlock is used as a substitute for directly calling up_write. Since the branches needing this are only 2 and their context is not that big it's more clear to just call up_write where required. No functional changes. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Ensure btrfs_init_dev_replace_tgtdev sees up to date valuesNikolay Borisov
btrfs_init_dev_replace_tgtdev reads certain values from the source device (such as commit_total_bytes) which are updated during transaction commit. Currently this function is called before committing any pending transaction, leading to possibly reading outdated values. Fix this by moving the function below the transaction commit, at this point the EXCL_OP bit it set hence once transaction is complete the total size of the device cannot be changed (it's usually changed by resize/remove ops which are blocked). Fixes: 9e271ae27e44 ("Btrfs: kernel operation should come after user input has been verified") Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: dev-replace: Remove impossible WARN_ONNikolay Borisov
This WARN_ON can never trigger because src_device cannot be null. btrfs_find_device_by_devspec always returns either an error or a valid pointer to the device. Just remove it. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Reduce critical section in btrfs_init_dev_replace_tgtdevNikolay Borisov
There is no point in holding btrfs_fs_devices::device_list_mutex while initialising fields of the not-yet-published device. Instead, hold the mutex only when the newly initialised device is being published. I think holding device_list_mutex here is redundant altogether, because at this point BTRFS_FS_EXCL_OP is set which prevents device removal/addition/balance/resize to occur. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: Don't opencode sync_blockdev in btrfs_init_dev_replace_tgtdevNikolay Borisov
Using sync_blockdev makes it plain obvious what's happening. No functional changes. Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: fiemap: preallocate ulists for btrfs_check_sharedDavid Sterba
btrfs_check_shared looks up parents of a given extent and uses ulists for that. These are allocated and freed repeatedly. Preallocation in the caller will avoid the overhead and also allow us to use the GFP_KERNEL as it is happens before the extent locks are taken. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Filipe Manana <fdmanana@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: detect fast implementation of crc32c on all architecturesDavid Sterba
Currently, there's only check for fast crc32c implementation on X86, based on the CPU flags. This is used to decide if checksumming should be offloaded to worker threads or can be calculated by the caller. As there are more architectures that implement a faster version of crc32c (ARM, SPARC, s390, MIPS, PowerPC), also there are specialized hw cards. The detection is based on driver name, all generic C implementations contain 'generic', while the specialized versions do not. Alternatively the priority could be used, but this is not currently provided by the crypto API. The flag is set per-filesystem at mount time and used for the offloading decisions. Signed-off-by: David Sterba <dsterba@suse.com>
2019-07-01btrfs: extent-tree: Refactor add_pinned_bytes() to add|sub_pinned_bytes()Qu Wenruo
Instead of using @sign to determine whether we're adding or subtracting. Even it only has 3 callers, it's still (and in fact already caused problem in the past) confusing to use. Refactor add_pinned_bytes() to add_pinned_bytes() and sub_pinned_bytes() to explicitly show what we're doing. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
2019-06-30xfs: remove XFS_TRANS_NOFSChristoph Hellwig
Instead of a magic flag for xfs_trans_alloc, just ensure all callers that can't relclaim through the file system use memalloc_nofs_save to set the per-task nofs flag. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-30xfs: simplify xfs_ioend_can_mergeChristoph Hellwig
Compare the block layer status directly instead of converting it to an errno first. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-30xfs: allow merging ioends over append boundariesChristoph Hellwig
There is no real problem merging ioends that go beyond i_size into an ioend that doesn't. We just need to move the append transaction to the base ioend. Also use the opportunity to use a real error code instead of the magic 1 to cancel the transactions, and write a comment explaining the scheme. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-30xfs: fix a comment typo in xfs_submit_ioendChristoph Hellwig
The fail argument is long gone, update the comment. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-30xfs: remove the unused xfs_count_page_state declarationChristoph Hellwig
Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
2019-06-29block: never take page references for ITER_BVECChristoph Hellwig
If we pass pages through an iov_iter we always already have a reference in the caller. Thus remove the ITER_BVEC_FLAG_NO_REF and don't take reference to pages by default for bvec backed iov_iters. Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-29direct-io: use bio_release_pages in dio_bio_completeChristoph Hellwig
Use bio_release_pages instead of duplicating it. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-29block_dev: use bio_release_pages in bio_unmap_userChristoph Hellwig
Use bio_release_pages instead of duplicating it. Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-29block_dev: use bio_release_pages in blkdev_bio_end_ioChristoph Hellwig
Use bio_release_pages instead of duplicating it. Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-29iomap: use bio_release_pages in iomap_dio_bio_end_ioChristoph Hellwig
Use bio_release_pages instead of duplicating it. Reviewed-by: Minwoo Im <minwoo.im.dev@gmail.com> Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2019-06-29Merge tag 'xarray-5.2-rc6' of git://git.infradead.org/users/willy/linux-daxLinus Torvalds
Pull XArray fixes from Matthew Wilcox: - Account XArray nodes for the page cache to the appropriate cgroup (Johannes Weiner) - Fix idr_get_next() when called under the RCU lock (Matthew Wilcox) - Add a test for xa_insert() (Matthew Wilcox) * tag 'xarray-5.2-rc6' of git://git.infradead.org/users/willy/linux-dax: XArray tests: Add check_insert idr: Fix idr_get_next race with idr_remove mm: fix page cache convergence regression
2019-06-29Merge branch 'akpm' (patches from Andrew)Linus Torvalds
Merge misc fixes from Andrew Morton: "15 fixes" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: linux/kernel.h: fix overflow for DIV_ROUND_UP_ULL mm, swap: fix THP swap out fork,memcg: alloc_thread_stack_node needs to set tsk->stack MAINTAINERS: add CLANG/LLVM BUILD SUPPORT info mm/vmalloc.c: avoid bogus -Wmaybe-uninitialized warning mm/page_idle.c: fix oops because end_pfn is larger than max_pfn initramfs: fix populate_initrd_image() section mismatch mm/oom_kill.c: fix uninitialized oc->constraint mm: hugetlb: soft-offline: dissolve_free_huge_page() return zero on !PageHuge mm: soft-offline: return -EBUSY if set_hwpoison_free_buddy_page() fails signal: remove the wrong signal_pending() check in restore_user_sigmask() fs/binfmt_flat.c: make load_flat_shared_library() work mm/mempolicy.c: fix an incorrect rebind node in mpol_rebind_nodemask fs/proc/array.c: allow reporting eip/esp for all coredumping threads mm/dev_pfn: exclude MEMORY_DEVICE_PRIVATE while computing virtual address
2019-06-29Merge tag 'nfs-for-5.2-4' of git://git.linux-nfs.org/projects/anna/linux-nfsLinus Torvalds
Pull two more NFS client fixes from Anna Schumaker: "These are both stable fixes. One to calculate the correct client message length in the case of partial transmissions. And the other to set the proper TCP timeout for flexfiles" * tag 'nfs-for-5.2-4' of git://git.linux-nfs.org/projects/anna/linux-nfs: NFS/flexfiles: Use the correct TCP timeout for flexfiles I/O SUNRPC: Fix up calculation of client message length
2019-06-29Merge tag 'ceph-for-5.2-rc7' of git://github.com/ceph/ceph-clientLinus Torvalds
Pull ceph fix from Ilya Dryomov: "A small fix for a potential -rc1 regression from Jeff" * tag 'ceph-for-5.2-rc7' of git://github.com/ceph/ceph-client: ceph: fix ceph_mdsc_build_path to not stop on first component
2019-06-29Merge tag 'for-linus-20190628' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull block fixes from Jens Axboe: "Just two small fixes. One from Paolo, fixing a silly mistake in BFQ. The other one is from me, ensuring that we have ->file cleared in the io_uring request a bit earlier. That avoids a use-before-free, if we encounter an error before ->file is assigned" * tag 'for-linus-20190628' of git://git.kernel.dk/linux-block: block, bfq: fix operator in BFQQ_TOTALLY_SEEKY io_uring: ensure req->file is cleared on allocation
2019-06-29signal: remove the wrong signal_pending() check in restore_user_sigmask()Oleg Nesterov
This is the minimal fix for stable, I'll send cleanups later. Commit 854a6ed56839 ("signal: Add restore_user_sigmask()") introduced the visible change which breaks user-space: a signal temporary unblocked by set_user_sigmask() can be delivered even if the caller returns success or timeout. Change restore_user_sigmask() to accept the additional "interrupted" argument which should be used instead of signal_pending() check, and update the callers. Eric said: : For clarity. I don't think this is required by posix, or fundamentally to : remove the races in select. It is what linux has always done and we have : applications who care so I agree this fix is needed. : : Further in any case where the semantic change that this patch rolls back : (aka where allowing a signal to be delivered and the select like call to : complete) would be advantage we can do as well if not better by using : signalfd. : : Michael is there any chance we can get this guarantee of the linux : implementation of pselect and friends clearly documented. The guarantee : that if the system call completes successfully we are guaranteed that no : signal that is unblocked by using sigmask will be delivered? Link: http://lkml.kernel.org/r/20190604134117.GA29963@redhat.com Fixes: 854a6ed56839a40f6b5d02a2962f48841482eec4 ("signal: Add restore_user_sigmask()") Signed-off-by: Oleg Nesterov <oleg@redhat.com> Reported-by: Eric Wong <e@80x24.org> Tested-by: Eric Wong <e@80x24.org> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Deepa Dinamani <deepa.kernel@gmail.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Jens Axboe <axboe@kernel.dk> Cc: Davidlohr Bueso <dave@stgolabs.net> Cc: Jason Baron <jbaron@akamai.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Al Viro <viro@ZenIV.linux.org.uk> Cc: David Laight <David.Laight@ACULAB.COM> Cc: <stable@vger.kernel.org> [5.0+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29fs/binfmt_flat.c: make load_flat_shared_library() workJann Horn
load_flat_shared_library() is broken: It only calls load_flat_file() if prepare_binprm() returns zero, but prepare_binprm() returns the number of bytes read - so this only happens if the file is empty. Instead, call into load_flat_file() if the number of bytes read is non-negative. (Even if the number of bytes is zero - in that case, load_flat_file() will see nullbytes and return a nice -ENOEXEC.) In addition, remove the code related to bprm creds and stop using prepare_binprm() - this code is loading a library, not a main executable, and it only actually uses the members "buf", "file" and "filename" of the linux_binprm struct. Instead, call kernel_read() directly. Link: http://lkml.kernel.org/r/20190524201817.16509-1-jannh@google.com Fixes: 287980e49ffc ("remove lots of IS_ERR_VALUE abuses") Signed-off-by: Jann Horn <jannh@google.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Cc: Kees Cook <keescook@chromium.org> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Russell King <linux@armlinux.org.uk> Cc: Greg Ungerer <gerg@linux-m68k.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-29fs/proc/array.c: allow reporting eip/esp for all coredumping threadsJohn Ogness
0a1eb2d474ed ("fs/proc: Stop reporting eip and esp in /proc/PID/stat") stopped reporting eip/esp and fd7d56270b52 ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping") reintroduced the feature to fix a regression with userspace core dump handlers (such as minicoredumper). Because PF_DUMPCORE is only set for the primary thread, this didn't fix the original problem for secondary threads. Allow reporting the eip/esp for all threads by checking for PF_EXITING as well. This is set for all the other threads when they are killed. coredump_wait() waits for all the tasks to become inactive before proceeding to invoke a core dumper. Link: http://lkml.kernel.org/r/87y32p7i7a.fsf@linutronix.de Link: http://lkml.kernel.org/r/20190522161614.628-1-jlu@pengutronix.de Fixes: fd7d56270b526ca3 ("fs/proc: Report eip/esp in /prod/PID/stat for coredumping") Signed-off-by: John Ogness <john.ogness@linutronix.de> Reported-by: Jan Luebbe <jlu@pengutronix.de> Tested-by: Jan Luebbe <jlu@pengutronix.de> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-06-28xfs: fix iclog allocation sizeChristoph Hellwig
Properly allocate the space for the bio_vecs instead of just one byte per bio_vec. Fixes: 79b54d9bfcdcd0a ("xfs: use bios directly to write log buffers") Reported-by: syzbot+b75afdbe271a0d7ac4f6@syzkaller.appspotmail.com Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
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