| commit | a7aaaff940e284035a16e07cf90424da386ddce1 | |
| author | Theodore Ts'o <tytso@mit.edu> | |
| Mon, 23 Nov 2009 12:24:46 +0000 (23 07:24 -0500) | ||
| committer | Greg Kroah-Hartman <gregkh@suse.de> | |
| Mon, 14 Dec 2009 16:07:23 +0000 (14 08:07 -0800) | ||
| tree | 6d814aefa4560b1d3e7e93ba1987b7b7a7356a49 | treesnapshot (tar.gz zip) |
| parent | 37bd334da00d116dba0526292891b1b572f1955b | commitdiff |
ext4: avoid divide by zero when trying to mount a corrupted file system
(cherry picked from commit 503358ae01b70ce6909d19dd01287093f6b6271c)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
(cherry picked from commit 503358ae01b70ce6909d19dd01287093f6b6271c)
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| fs/ext4/super.c | diffblobblamehistory |