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linux/fs/nilfs2
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Nikita Zhandarovich b9495a9109 nilfs2: fix possible int overflows in nilfs_fiemap() 
commit 6438ef381c upstream.

Since nilfs_bmap_lookup_contig() in nilfs_fiemap() calculates its result
by being prepared to go through potentially maxblocks == INT_MAX blocks,
the value in n may experience an overflow caused by left shift of blkbits.

While it is extremely unlikely to occur, play it safe and cast right hand
expression to wider type to mitigate the issue.

Found by Linux Verification Center (linuxtesting.org) with static analysis
tool SVACE.

Link: https://lkml.kernel.org/r/20250124222133.5323-1-konishi.ryusuke@gmail.com
Fixes: 622daaff0a ("nilfs2: fiemap support")
Signed-off-by: Nikita Zhandarovich <n.zhandarovich@fintech.ru>
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-02-17 10:05:39 +01:00
..
alloc.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 19:30:16 -07:00
alloc.h nilfs2: fix incorrect kernel-doc declaration of nilfs_palloc_req structure 2024-09-01 20:43:36 -07:00
bmap.c nilfs2: fix missing initial short descriptions of kernel-doc comments 2024-09-01 20:43:37 -07:00
bmap.h nilfs2: use the BITS_PER_LONG macro 2024-09-01 20:43:42 -07:00
btnode.c nilfs2: fix buffer head leaks in calls to truncate_inode_pages() 2024-12-27 14:02:18 +01:00
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 potential oob read in nilfs_btree_check_delete() 2024-09-09 16:47:42 -07:00
btree.h nilfs2: add missing description of nilfs_btree_path structure 2024-09-01 20:43:36 -07:00
cpfile.c nilfs2: treat missing cpfile header block as metadata corruption 2024-09-01 20:43:39 -07:00
cpfile.h nilfs2: remove nilfs_cpfile_{get,put}_checkpoint() 2024-02-22 15:38:53 -08:00
dat.c nilfs2: fix missing initial short descriptions of kernel-doc comments 2024-09-01 20:43:37 -07:00
dat.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
dir.c nilfs2: handle errors that nilfs_prepare_chunk() may return 2025-02-08 09:57:58 +01:00
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: fix buffer head leaks in calls to truncate_inode_pages() 2024-12-27 14:02:18 +01:00
ifile.c nilfs2: fix incorrect inode allocation from reserved inodes 2024-07-03 19:30:16 -07:00
ifile.h nilfs2: localize highmem mapping for checkpoint reading within cpfile 2024-02-22 15:38:53 -08:00
inode.c nilfs2: fix possible int overflows in nilfs_fiemap() 2025-02-17 10:05:39 +01:00
ioctl.c nilfs2: add missing argument descriptions for ioctl-related helpers 2024-09-01 20:43:35 -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
mdt.c nilfs2: fix null-ptr-deref in block_dirty_buffer tracepoint 2024-11-11 17:20:23 -08:00
mdt.h nilfs2: fix lockdep warnings during disk space reclamation 2022-04-01 11:46:09 -07:00
namei.c nilfs2: handle errors that nilfs_prepare_chunk() may return 2025-02-08 09:57:58 +01:00
nilfs.h nilfs2: handle errors that nilfs_prepare_chunk() may return 2025-02-08 09:57:58 +01:00
page.c nilfs2: do not force clear folio if buffer is referenced 2025-02-08 09:57:58 +01:00
page.h nilfs2: do not output warnings when clearing dirty buffers 2024-09-01 20:43:35 -07:00
recovery.c Many singleton patches - please see the various changelogs for details. 2024-09-21 08:20:50 -07:00
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: protect access to buffers with no active references 2025-02-08 09:57:58 +01:00
segment.h nilfs2: use kthread_create and kthread_stop for the log writer thread 2024-09-01 20:43:44 -07:00
sufile.c nilfs2: do not propagate ENOENT error from nilfs_sufile_mark_dirty() 2024-09-01 20:43:40 -07:00
sufile.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
super.c nilfs2: separate inode type information from i_state field 2024-09-01 20:43:43 -07:00
sysfs.c nilfs2: protect references to superblock parameters exposed in sysfs 2024-09-01 17:59:00 -07:00
sysfs.h nilfs2: remove filenames from file comments 2021-11-09 10:02:52 -08:00
the_nilfs.c nilfs2: eliminate the shared counter and spinlock for i_generation 2024-09-01 20:43:43 -07:00
the_nilfs.h nilfs2: eliminate the shared counter and spinlock for i_generation 2024-09-01 20:43:43 -07:00