Commit 80de7c31 authored Sep 06, 2012 by Dave Jones Committed by Linus Torvalds Sep 06, 2012

Remove user-triggerable BUG from mpol_to_str



Trivially triggerable, found by trinity:

  kernel BUG at mm/mempolicy.c:2546!
  Process trinity-child2 (pid: 23988, threadinfo ffff88010197e000, task ffff88007821a670)
  Call Trace:
    show_numa_map+0xd5/0x450
    show_pid_numa_map+0x13/0x20
    traverse+0xf2/0x230
    seq_read+0x34b/0x3e0
    vfs_read+0xac/0x180
    sys_pread64+0xa2/0xc0
    system_call_fastpath+0x1a/0x1f
  RIP: mpol_to_str+0x156/0x360

Cc: stable@vger.kernel.org
Signed-off-by: Dave Jones <davej@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 08090950

mm/mempolicy.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -2562,7 +2562,7 @@ int mpol_to_str(char buffer, int maxlen, struct mempolicy pol, int no_context)
		break;

		default:
		BUG();
		return -EINVAL;
		}

		l = strlen(policy_modes[mode]);

Admin message