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| author | Arturo Giusti <koredump@protonmail.com> | 2021-05-18 12:34:57 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-07-20 16:15:59 +0200 |
| commit | 3638705ecd5ad2785e996f820121c0ad15ce64b5 (patch) | |
| tree | 41ec559d313977c051a7ff3cfb2fa8961cfec841 /fs/nfs/file.c | |
| parent | 2fda4ff855d8be14338cc383fad3f2fa2f7d30aa (diff) | |
| download | linux-stable-3638705ecd5ad2785e996f820121c0ad15ce64b5.tar.gz linux-stable-3638705ecd5ad2785e996f820121c0ad15ce64b5.tar.bz2 linux-stable-3638705ecd5ad2785e996f820121c0ad15ce64b5.zip | |
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>
Diffstat (limited to 'fs/nfs/file.c')
0 files changed, 0 insertions, 0 deletions