Arturo Giusti baea588a42 udf: Fix NULL pointer dereference in udf_symlink function ...

[ Upstream commit fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43 ]

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>
Signed-off-by: Sasha Levin <sashal@kernel.org>

2021-07-20 16:17:42 +02:00

..

balloc.c

…

dir.c

…

directory.c

udf: Detect incorrect directory size

2018-07-03 11:25:03 +02:00

ecma_167.h

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file.c

…

ialloc.c

…

inode.c

udf: fix silent AED tagLocation corruption

2021-03-17 16:34:30 +01:00

Kconfig

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lowlevel.c

…

Makefile

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misc.c

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namei.c

udf: Fix NULL pointer dereference in udf_symlink function

2021-07-20 16:17:42 +02:00

osta_udf.h

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partition.c

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super.c

udf: Limit sparing table size

2020-10-29 09:07:17 +01:00

symlink.c

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truncate.c

udf: Fix crash on IO error during truncate

2019-03-27 14:13:52 +09:00

udf_i.h

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udf_sb.h

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udfdecl.h

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udfend.h

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udftime.c

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unicode.c

udf: Allow mounting volumes with incorrect identification strings

2018-12-08 13:03:39 +01:00