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Pavel Skripkin 6bbfe9a715 jfs: fix divide error in dbNextAG 
[ Upstream commit 2cc7cc01c15f57d056318c33705647f87dcd4aab ]

Syzbot reported divide error in dbNextAG(). The problem was in missing
validation check for malicious image.

Syzbot crafted an image with bmp->db_numag equal to 0. There wasn't any
validation checks, but dbNextAG() blindly use bmp->db_numag in divide
expression

Fix it by validating bmp->db_numag in dbMount() and return an error if
image is malicious

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-and-tested-by: syzbot+46f5c25af73eb8330eb6@syzkaller.appspotmail.com
Signed-off-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-04-08 14:23:51 +02:00
..
acl.c
vfs: add rcu argument to ->get_acl() callback
2021-08-18 22:08:24 +02:00
file.c
jfs: convert to fileattr
2021-04-12 15:04:29 +02:00
inode.c
JFS fixes for 5.14
2021-07-02 14:25:17 -07:00
ioctl.c
jfs: convert to fileattr
2021-04-12 15:04:29 +02:00
jfs_acl.h
vfs: add rcu argument to ->get_acl() callback
2021-08-18 22:08:24 +02:00
jfs_btree.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_debug.c
proc: convert everything to "struct proc_ops"
2020-02-04 03:05:26 +00:00
jfs_debug.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_dinode.h
jfs: Avoid field-overflowing memcpy()
2021-06-23 09:21:52 -05:00
jfs_discard.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_discard.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_dmap.c
jfs: fix divide error in dbNextAG
2022-04-08 14:23:51 +02:00
jfs_dmap.h
jfs: Fix array index bounds check in dbAdjTree
2020-11-13 16:03:07 -06:00
jfs_dtree.c
jfs: Replace zero-length array with flexible-array member
2020-03-09 15:18:51 -05:00
jfs_dtree.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_extent.c
jfs: delete duplicated words + other fixes
2020-11-13 13:36:00 -06:00
jfs_extent.h
jfs: delete duplicated words + other fixes
2020-11-13 13:36:00 -06:00
jfs_filsys.h
JFS: more checks for invalid superblock
2020-12-18 15:23:33 -06:00
jfs_imap.c
jfs: Avoid field-overflowing memcpy()
2021-06-23 09:21:52 -05:00
jfs_imap.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_incore.h
jfs: Avoid field-overflowing memcpy()
2021-06-23 09:21:52 -05:00
jfs_inode.c
inode: make init and permission helpers idmapped mount aware
2021-01-24 14:27:16 +01:00
jfs_inode.h
jfs: convert to fileattr
2021-04-12 15:04:29 +02:00
jfs_lock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_logmgr.c
fs/jfs: Fix missing error code in lmLogInit()
2021-06-01 10:29:12 -05:00
jfs_logmgr.h
jfs: delete duplicated words + other fixes
2020-11-13 13:36:00 -06:00
jfs_metapage.c
fs: Introduce i_blocks_per_page
2020-09-21 08:59:26 -07:00
jfs_metapage.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_mount.c
JFS: fix memleak in jfs_mount
2021-11-18 19:16:48 +01:00
jfs_superblock.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_txnmgr.c
jfs: Remove trailing semicolon in macros
2021-05-21 10:36:22 -05:00
jfs_txnmgr.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_types.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_umount.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_unicode.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_unicode.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_uniupr.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
jfs_xattr.h
jfs: Replace zero-length array with flexible-array member
2020-03-09 15:18:51 -05:00
jfs_xtree.c
jfs: delete duplicated words + other fixes
2020-11-13 13:36:00 -06:00
jfs_xtree.h
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
Kconfig
docs: fix a couple of new broken references
2019-07-31 14:12:26 -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
namei.c
jfs: convert to fileattr
2021-04-12 15:04:29 +02:00
resize.c
block: move struct block_device to blk_types.h
2020-06-24 09:16:02 -06:00
super.c
jfs: Avoid field-overflowing memcpy()
2021-06-23 09:21:52 -05:00
symlink.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156
2019-05-30 11:26:35 -07:00
xattr.c
acl: handle idmapped mounts
2021-01-24 14:27:17 +01:00