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author | Lukas Czerner <lczerner@redhat.com> | 2012-03-02 13:09:05 +0100 |
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committer | Jan Kara <jack@suse.cz> | 2012-03-02 17:47:40 +0100 |
commit | e703c206135acb458adb705ec44bcc5d2615b37d (patch) | |
tree | ac569403ce4e4c1da33307e862c009810c56c492 /fs/udf | |
parent | a0391a3ae91d301c0e59368531a4de5f0b122bcf (diff) | |
download | op-kernel-dev-e703c206135acb458adb705ec44bcc5d2615b37d.zip op-kernel-dev-e703c206135acb458adb705ec44bcc5d2615b37d.tar.gz |
ext3: fix start and len arguments handling in ext3_trim_fs()
The overflow might happen when passing blocknr into
ext3_get_group_no_and_offset(), because it expects type ext3_fsblk_t
which might be smaller than uint64_t. This will most likely happen when
calling FITRIM with the default argument len = ULLONG_MAX.
Fix this by using "end" variable instead of "start+len" as it is easier
to get right and specifically check that the end is not beyond the end
of the file system, so we are sure that the result of
get_group_no_and_offset() will not overflow. Otherwise truncate it to
the size of the file system.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
0 files changed, 0 insertions, 0 deletions