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linux/fs/nilfs2
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Ryusuke Konishi 0c8aa4cfda nilfs2: prevent kernel bug at submit_bh_wbc() 
[ Upstream commit 269cdf353b ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-04-03 15:28:34 +02:00
..
alloc.c nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse 2023-08-21 13:46:25 -07:00
alloc.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
bmap.c nilfs2: fix infinite loop in nilfs_mdt_get_block() 2023-05-06 10:10:07 -07:00
bmap.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
btnode.c nilfs2: fix incomplete buffer cleanup in nilfs_btnode_abort_change_key() 2023-06-12 11:31:49 -07:00
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 2024-04-03 15:28:34 +02:00
btree.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
cpfile.c nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
cpfile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
dat.c nilfs2: prevent WARNING in nilfs_dat_commit_end() 2023-02-02 22:50:10 -08:00
dat.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
dir.c nilfs2: convert to ctime accessor functions 2023-07-24 10:30:02 +02:00
direct.c nilfs2: fix failure to detect DAT corruption in btree and direct mappings 2024-04-03 15:28:34 +02:00
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() 2024-02-23 09:25:11 +01:00
gcinode.c nilfs2: fix potential use after free in nilfs_gccache_submit_read_data() 2023-09-29 17:20:46 -07:00
ifile.c nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
ifile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
inode.c nilfs2: prevent kernel bug at submit_bh_wbc() 2024-04-03 15:28:34 +02:00
ioctl.c nilfs2: convert to ctime accessor functions 2023-07-24 10:30:02 +02:00
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
mdt.c nilfs2: replace obvious uses of b_page with b_folio 2023-01-18 17:12:41 -08:00
mdt.h nilfs2: fix lockdep warnings during disk space reclamation 2022-04-01 11:46:09 -07:00
namei.c nilfs2: convert to ctime accessor functions 2023-07-24 10:30:02 +02:00
nilfs.h fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
page.c nilfs2: prevent general protection fault in nilfs_clear_dirty_page() 2023-06-19 13:19:35 -07:00
page.h nilfs2: get rid of nilfs_mapping_init() 2022-04-01 11:46:09 -07:00
recovery.c nilfs2: fix data corruption in dsync block recovery for small block sizes 2024-02-23 09:25:11 +01:00
segbuf.c nilfs2: fix buffer corruption due to concurrent device reads 2023-06-19 13:19:33 -07:00
segbuf.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
segment.c nilfs2: fix potential bug in end_buffer_async_write 2024-02-23 09:25:27 +01:00
segment.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
sufile.c nilfs2: prevent WARNING in nilfs_sufile_set_segment_usage() 2023-12-13 18:45:22 +01:00
sufile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
super.c nilfs2: use setup_bdev_super to de-duplicate the mount code 2023-08-10 10:34:56 +02:00
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: fix missing error check for sb_set_blocksize call 2023-12-13 18:45:22 +01:00
the_nilfs.h nilfs2: fix use-after-free of nilfs_root in dirtying inodes via iput 2023-08-04 13:03:43 -07:00