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(parent: 1227935) | patch
udf: Verify symlink size before loading it
authorJan Kara <jack@suse.cz>
Fri, 19 Dec 2014 11:21:47 +0000 (12:21 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 8 Jan 2015 17:58:17 +0000 (09:58 -0800)
commit5fdeca1b0acd9790cdd5891a76bb6dfb707d2a1c
tree770af0b74594fbee601c63d5984fa621e23b28ddtree | snapshot (tar.gz zip)
parent12279351a42d51638a21ede8a3f6c62aea26491ecommit | diff
udf: Verify symlink size before loading it

commit a1d47b262952a45aae62bd49cfaf33dd76c11a2c upstream.

UDF specification allows arbitrarily large symlinks. However we support
only symlinks at most one block large. Check the length of the symlink
so that we don't access memory beyond end of the symlink block.

Reported-by: Carl Henrik Lunde <chlunde@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
fs/udf/symlink.c diff | blob | blame | history
kernel source for telekom puls (alcatel/mediatek)