| commit | 503358ae01b70ce6909d19dd01287093f6b6271c | |
| author | Theodore Ts'o <tytso@mit.edu> | |
| Mon, 23 Nov 2009 12:24:46 +0000 (23 07:24 -0500) | ||
| committer | Theodore Ts'o <tytso@mit.edu> | |
| Mon, 23 Nov 2009 12:24:46 +0000 (23 07:24 -0500) | ||
| tree | ef81060e38e5eb0895e9455892d5f8cf186a0603 | treesnapshot (tar.gz zip) |
| parent | 2de770a406b06dfc619faabbf5d85c835ed3f2e1 | commitdiff |
ext4: avoid divide by zero when trying to mount a corrupted file system
If s_log_groups_per_flex is greater than 31, then groups_per_flex will
will overflow and cause a divide by zero error. This can cause kernel
BUG if such a file system is mounted.
Thanks to Nageswara R Sastry for analyzing the failure and providing
an initial patch.
http://bugzilla.kernel.org/show_bug.cgi?id=14287
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
If s_log_groups_per_flex is greater than 31, then groups_per_flex will
will overflow and cause a divide by zero error. This can cause kernel
BUG if such a file system is mounted.
Thanks to Nageswara R Sastry for analyzing the failure and providing
an initial patch.
http://bugzilla.kernel.org/show_bug.cgi?id=14287
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
| fs/ext4/super.c | diffblobblamehistory |