[Bug 14256] kernel BUG at fs/ext3/super.c:435

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



http://bugzilla.kernel.org/show_bug.cgi?id=14256





--- Comment #33 from Darren Hart <dvhltc@xxxxxxxxxx>  2010-01-20 19:29:53 ---
Took a look at the 2.6.29 code, I believe it is possible to have an inode
reference imbalance when a fault is taken. Unfortunately, both queue_lock() and
get_futex_key() acquire references to the inode (I'd like to do away with
queue_lock() as it masks reference usage and generally complicates the
corner-case-heavy futex code). In the fault path queue_unlock() will release
the first inode reference, but if on the first attempt (attempt == 0) the
get_user() fails, we'll simply return without dropping the second reference.
Some instrumentation could confirm this. I'll take a look at later sources
which should have a significantly different fault path.

-- 
Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are watching the assignee of the bug.
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html

[Index of Archives]     [Reiser Filesystem Development]     [Ceph FS]     [Kernel Newbies]     [Security]     [Netfilter]     [Bugtraq]     [Linux FS]     [Yosemite National Park]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Samba]     [Device Mapper]     [Linux Media]

  Powered by Linux