| commit | add3efdd78b8a0478ce423bb9d4df6bd95e8b335 | |
| author | Jan Kara <jack@suse.cz> | |
| Tue, 5 Nov 2019 16:44:07 +0000 (5 17:44 +0100) | ||
| committer | Theodore Ts'o <tytso@mit.edu> | |
| Tue, 5 Nov 2019 17:13:25 +0000 (5 12:13 -0500) | ||
| tree | 0555cd095901cba4a4a91e86d58eaf459e9f2c51 | treesnapshot (tar.gz zip) |
| parent | 4f5cafb5cb8471e54afdc9054d973535614f7675 | commitdiff |
jbd2: Fix possible overflow in jbd2_log_space_left()
When number of free space in the journal is very low, the arithmetic in
jbd2_log_space_left() could underflow resulting in very high number of
free blocks and thus triggering assertion failure in transaction commit
code complaining there's not enough space in the journal:
J_ASSERT(journal->j_free > 1);
Properly check for the low number of free blocks.
CC: stable@vger.kernel.org
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
When number of free space in the journal is very low, the arithmetic in
jbd2_log_space_left() could underflow resulting in very high number of
free blocks and thus triggering assertion failure in transaction commit
code complaining there's not enough space in the journal:
J_ASSERT(journal->j_free > 1);
Properly check for the low number of free blocks.
CC: stable@vger.kernel.org
Reviewed-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jan Kara <jack@suse.cz>
Link: https://lore.kernel.org/r/20191105164437.32602-1-jack@suse.cz
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
| include/linux/jbd2.h | diffblobblamehistory |