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linux-stable/fs/nilfs2
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Ryusuke Konishi 269cdf353b nilfs2: prevent kernel bug at submit_bh_wbc() 
Fix a bug where nilfs_get_block() returns a successful status when
searching and inserting the specified block both fail inconsistently.  If
this inconsistent behavior is not due to a previously fixed bug, then an
unexpected race is occurring, so return a temporary error -EAGAIN instead.

This prevents callers such as __block_write_begin_int() from requesting a
read into a buffer that is not mapped, which would cause the BUG_ON check
for the BH_Mapped flag in submit_bh_wbc() to fail.

Link: https://lkml.kernel.org/r/20240313105827.5296-3-konishi.ryusuke@gmail.com
Fixes: 1f5abe7e7d ("nilfs2: replace BUG_ON and BUG calls triggerable from ioctl")
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
 		2024-03-14 09:17:30 -07:00
..
Kconfig fs: add CONFIG_BUFFER_HEAD 2023-08-02 09:13:09 -06:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
alloc.c nilfs2: convert persistent object allocator to use kmap_local 2024-02-22 15:38:53 -08:00
alloc.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
bmap.c nilfs2: do not acquire rwsem in nilfs_bmap_write() 2024-02-22 15:38:53 -08:00
bmap.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
btnode.c nilfs2: convert nilfs_page_bug() to nilfs_folio_bug() 2023-12-10 17:21:48 -08:00
btnode.h fs/nilfs2: Use the enum req_op and blk_opf_t types 2022-07-14 12:14:33 -06:00
btree.c nilfs2: fix failure to detect DAT corruption in btree and direct mappings 2024-03-14 09:17:29 -07:00
btree.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
cpfile.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
cpfile.h nilfs2: remove nilfs_cpfile_{get,put}_checkpoint() 2024-02-22 15:38:53 -08:00
dat.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
dat.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
dir.c nilfs2: convert nilfs_prepare_chunk() and nilfs_commit_chunk() to folios 2023-12-10 17:21:48 -08:00
direct.c nilfs2: fix failure to detect DAT corruption in btree and direct mappings 2024-03-14 09:17:29 -07:00
direct.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
export.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
file.c nilfs2: fix hang in nilfs_lookup_dirty_data_buffers() 2024-02-07 21:20:36 -08:00
gcinode.c nilfs2: convert nilfs_gccache_submit_read_data to use a folio 2023-12-10 17:21:29 -08:00
ifile.c nilfs2: localize highmem mapping for checkpoint reading within cpfile 2024-02-22 15:38:53 -08:00
ifile.h nilfs2: localize highmem mapping for checkpoint reading within cpfile 2024-02-22 15:38:53 -08:00
inode.c nilfs2: prevent kernel bug at submit_bh_wbc() 2024-03-14 09:17:30 -07:00
ioctl.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
mdt.c nilfs2: convert metadata file common code to use kmap_local 2024-02-22 15:38:53 -08:00
mdt.h nilfs2: fix lockdep warnings during disk space reclamation 2022-04-01 11:46:09 -07:00
namei.c misc cleanups (the part that hadn't been picked by individual fs trees) 2024-01-11 20:23:50 -08:00
nilfs.h nilfs2: move nilfs_bmap_write call out of nilfs_write_inode_common 2024-02-22 15:38:53 -08:00
page.c nilfs2: convert nilfs_copy_buffer() to use kmap_local 2024-02-22 15:38:53 -08:00
page.h nilfs2: convert nilfs_page_bug() to nilfs_folio_bug() 2023-12-10 17:21:48 -08:00
recovery.c nilfs2: convert recovery logic to use kmap_local 2024-02-22 15:38:52 -08:00
segbuf.c nilfs2: convert segment buffer to use kmap_local 2024-02-22 15:38:53 -08:00
segbuf.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
segment.c nilfs2: localize highmem mapping for checkpoint finalization within cpfile 2024-02-22 15:38:53 -08:00
segment.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
sufile.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
sufile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
super.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
sysfs.c nilfs2: use default_groups in kobj_type 2021-12-29 10:53:48 +01:00
sysfs.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
the_nilfs.c nilfs2: use div64_ul() instead of do_div() 2024-03-12 13:09:23 -07:00
the_nilfs.h nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput 2023-08-04 13:03:43 -07:00