On 05/09/2013 03:08 AM, Li Zefan wrote:
Cc: Naoya Horiguchi <n-horigu...@ah.jp.nec.com>
On 2013/5/9 12:35, Dave Jones wrote:
Just saw this on v3.9-11789-ge0fd9af while fuzz-testing.
[ 163.917836] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[ 163.918984] IP: [<ffffffff812c48ed>] newseg+0x10d/0x390
The patch below should fix it.
===========================
[PATCH] shm: fix null pointer deref when userspace specifies invalid hugepage
size
Dave reported an oops triggered by trinity:
[ 163.917836] BUG: unable to handle kernel NULL pointer dereference at
0000000000000008
[ 163.918984] IP: [<ffffffff812c48ed>] newseg+0x10d/0x390
[ 163.919705] PGD cf8c1067 PUD cf8c2067 PMD 0
[ 163.920326] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 163.929949] CPU: 2 PID: 7636 Comm: trinity-child2 Not tainted 3.9.0+#67
...
[ 163.953629] Call Trace:
[ 163.957706] [<ffffffff812be322>] ipcget+0x182/0x380
[ 163.962123] [<ffffffff810b99a5>] ?trace_hardirqs_on_caller+0x115/0x1e0
[ 163.966752] [<ffffffff812c559a>] SyS_shmget+0x5a/0x60
[ 163.971163] [<ffffffff812c47e0>] ? shm_close+0x140/0x140
[ 163.975590] [<ffffffff812c3e60>] ? shm_release+0x50/0x50
[ 163.979991] [<ffffffff812c3df0>] ? shm_get_unmapped_area+0x20/0x20
[ 163.984499] [<ffffffff816caa14>] tracesys+0xdd/0xe2
This bug was introduced by commit af73e4d9506d3b797509f3c030e7dcd554f7d9c4
("hugetlbfs: fix mmap failure in unaligned size request").
Reported-by: Dave Jones <da...@redhat.com>
Cc: <sta...@vger.kernel.org>
Signed-off-by: Li Zefan <liz...@huawei.com>
Acked-by: Rik van Riel <r...@redhat.com>
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
