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fa236c2b2d
linux/fs/udf
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Arturo Giusti fa236c2b2d udf: Fix NULL pointer dereference in udf_symlink function 
In function udf_symlink, epos.bh is assigned with the value returned
by udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c
and returns the value of sb_getblk function that could be NULL.
Then, epos.bh is used without any check, causing a possible
NULL pointer dereference when sb_getblk fails.

This fix adds a check to validate the value of epos.bh.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=213083
Signed-off-by: Arturo Giusti <koredump@protonmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
2021-05-20 12:14:44 +02:00
..
balloc.c treewide: Remove uninitialized_var() usage 2020-07-16 12:35:15 -07:00
dir.c udf: Fix 64-bit sign extension issues affecting blocks > 0x7FFFFFFF 2017-10-17 11:56:45 +02:00
directory.c udf: Remove pointless union in udf_inode_info 2020-09-29 17:21:54 +02:00
ecma_167.h udf: Replace HTTP links with HTTPS ones 2020-07-14 14:37:39 +02:00
file.c fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
ialloc.c inode: make init and permission helpers idmapped mount aware 2021-01-24 14:27:16 +01:00
inode.c udf: fix silent AED tagLocation corruption 2021-01-25 18:09:25 +01:00
Kconfig docs: filesystems: fix renamed references 2020-04-20 15:45:22 -06:00
lowlevel.c udf: stop using ioctl_by_bdev 2020-05-04 10:13:42 -06:00
Makefile treewide: Add SPDX license identifier - Makefile/Kconfig 2019-05-21 10:50:46 +02:00
misc.c udf: Remove pointless union in udf_inode_info 2020-09-29 17:21:54 +02:00
namei.c udf: Fix NULL pointer dereference in udf_symlink function 2021-05-20 12:14:44 +02:00
osta_udf.h udf: osta_udf.h: delete a duplicated word 2020-07-27 10:58:55 +02:00
partition.c udf: Remove pointless union in udf_inode_info 2020-09-29 17:21:54 +02:00
super.c \n 2021-02-22 13:25:37 -08:00
symlink.c fs: make helpers idmap mount aware 2021-01-24 14:27:20 +01:00
truncate.c udf: Fix spelling in EXT_NEXT_EXTENT_ALLOCDESCS 2020-01-08 11:11:46 +01:00
udf_i.h udf: Remove pointless union in udf_inode_info 2020-09-29 17:21:54 +02:00
udf_sb.h udf: udf_sb.h: Replace zero-length array with flexible-array member 2020-03-16 15:57:09 +01:00
udfdecl.h udf: augment UDF permissions on new inodes 2019-08-27 15:38:46 +02:00
udfend.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
udftime.c udf: convert inode stamps to timespec64 2018-06-27 13:58:00 +02:00
unicode.c udf: Allow mounting volumes with incorrect identification strings 2018-11-19 10:27:59 +01:00