Hi all, I've started seeing the following when fuzzing with trinity in a KVM tools guest, using the latest -next. This started with yesterday's linux-next, so it's probably one of the recent changes there. I can try bisecting if the problem isn't clear. [ 47.940509] BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [ 47.941435] IP: [<ffffffff8124e6a8>] dup_mnt_ns+0x38/0x270 [ 47.941435] PGD 17a8d067 PUD 17a8b067 PMD 0 [ 47.941435] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC [ 47.941435] CPU 1 [ 47.950548] Pid: 6202, comm: trinity Tainted: G W 3.4.0-rc6-next-20120511-sasha-00003-g0642143 #186 [ 47.950548] RIP: 0010:[<ffffffff8124e6a8>] [<ffffffff8124e6a8>] dup_mnt_ns+0x38/0x270 [ 47.950548] RSP: 0018:ffff880017831e38 EFLAGS: 00010282 [ 47.950548] RAX: 0000000000000000 RBX: ffff88001b4cfc00 RCX: 0000000000000001 [ 47.950548] RDX: 0000000000000018 RSI: ffffffff8525cfc0 RDI: 0000000000000282 [ 47.950548] RBP: ffff880017831e98 R08: 0000000000000001 R09: 0000000000000001 [ 47.950548] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 47.950548] R13: ffff880015d241c8 R14: ffff88001b4cfc00 R15: 000000004c020700 [ 47.950548] FS: 00007fefc9b43700(0000) GS:ffff88001b800000(0000) knlGS:0000000000000000 [ 47.950548] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.950548] CR2: 0000000000000020 CR3: 00000000179be000 CR4: 00000000000406e0 [ 47.950548] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 47.950548] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 47.950548] Process trinity (pid: 6202, threadinfo ffff880017830000, task ffff880017b60000) [ 47.950548] Stack: [ 47.950548] ffff88001b4e5be8 ffff88003540c000 ffff88001b4e5be8 00000000000000d0 [ 47.950548] ffff880017831eb8 ffffffff81218814 ffff880017b60000 ffff880017963008 [ 47.950548] 000000004c020700 ffff880017b60000 ffff88001b4cfc00 000000004c020700 [ 47.950548] Call Trace: [ 47.950548] [<ffffffff81218814>] ? kmem_cache_alloc+0x154/0x240 [ 47.950548] [<ffffffff8124e91e>] copy_mnt_ns+0x3e/0x60 [ 47.950548] [<ffffffff81105e7c>] create_new_namespaces+0x6c/0x190 [ 47.950548] [<ffffffff81106001>] unshare_nsproxy_namespaces+0x61/0x80 [ 47.950548] [<ffffffff810ce51f>] sys_unshare+0xff/0x290 [ 47.950548] [<ffffffff8195600e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 47.950548] [<ffffffff82f08039>] system_call_fastpath+0x16/0x1b [ 47.950548] Code: 48 89 f3 48 83 ec 38 4c 8b 67 08 e8 83 ce ff ff 49 89 c5 48 3d 00 f0 ff ff 0f 87 16 02 00 00 48 c7 c7 60 cf 25 85 e8 e8 5c cb 01 <49> 8b 74 24 20 ba 05 00 00 00 4c 89 e7 e8 16 fb ff ff 49 89 c6 [ 47.950548] RIP [<ffffffff8124e6a8>] dup_mnt_ns+0x38/0x270 [ 47.950548] RSP <ffff880017831e38> [ 47.950548] CR2: 0000000000000020 [ 47.950613] ---[ end trace 6d450e935ee18997 ]--- -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
