commit: 80de7c3138ee9fd86a98696fd2cf7ad89b995d0a
From: Dave Jones <[email protected]>
Date: Thu, 6 Sep 2012 12:01:00 -0400
Subject: 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: [email protected]
Signed-off-by: Dave Jones <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
---
mm/mempolicy.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index bd92431..4ada3be 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -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]);
--
1.7.3.4
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