On Thu, 08 Apr 2010 03:51:50 +0200 Andrea Arcangeli <aarcange@xxxxxxxxxx> wrote: > From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > If a signal is pending (task being killed by sigkill) __mem_cgroup_try_charge > will write NULL into &mem, and css_put will oops on null pointer dereference. > > BUG: unable to handle kernel NULL pointer dereference at 0000000000000010 > IP: [<ffffffff810fc6cc>] mem_cgroup_prepare_migration+0x7c/0xc0 > PGD a5d89067 PUD a5d8a067 PMD 0 > Oops: 0000 [#1] SMP > last sysfs file: /sys/devices/platform/microcode/firmware/microcode/loading > CPU 0 > Modules linked in: nfs lockd nfs_acl auth_rpcgss sunrpc acpi_cpufreq pcspkr sg [last unloaded: microcode] > > Pid: 5299, comm: largepages Tainted: G W 2.6.34-rc3 #3 Penryn1600SLI-110dB/To Be Filled By O.E.M. > RIP: 0010:[<ffffffff810fc6cc>] [<ffffffff810fc6cc>] mem_cgroup_prepare_migration+0x7c/0xc0 > > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> Thank you. Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@xxxxxxxxxxxxxx> Andrew, I think this patch itself should be queued up as bugfix to exisiting code. It seems there is no dependecy to other pathces. Thanks, -Kame -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>