From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: inode_permission NULL pointer dereference in 3.13-rc1 Date: Sun, 24 Nov 2013 06:04:13 -0800 Message-ID: <20131124140413.GA19271@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: xfs@oss.sgi.com To: linux-fsdevel@vger.kernel.org Return-path: Content-Disposition: inline List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com List-Id: linux-fsdevel.vger.kernel.org Seems I can reproduce this by doing a full xfstests run and then shutting down the VM. Doesn't seem to happen with the XFS tree which is still based on 3.12-rc1. [ ok ] Deactivating swap...done. [ ok ] Unmounting local filesystems...done. [ 3387.907240] BUG: unable to handle kernel NULL pointer dereference at 0000000000000028 [ 3387.909554] IP: [] inode_permission+0x5/0x50 [ 3387.910409] PGD 75a3e067 PUD 18f99067 PMD 0 [ 3387.910409] Oops: 0000 [#1] SMP [ 3387.910409] Modules linked in: [ 3387.910409] CPU: 2 PID: 10493 Comm: startpar Not tainted 3.13.0-rc1+ #38 [ 3387.910409] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 3387.910409] task: ffff880075a0a090 ti: ffff880077322000 task.ti: ffff880077322000 [ 3387.910409] RIP: 0010:[] [] inode_permission+0x5/0x50 [ 3387.910409] RSP: 0018:ffff880077323cc8 EFLAGS: 00010246 [ 3387.910409] RAX: ffff880075a0a090 RBX: ffff880068d29021 RCX: ffff88007d029818 [ 3387.910409] RDX: 0000000000000002 RSI: 0000000000000081 RDI: 0000000000000000 [ 3387.910409] RBP: ffff880077323d78 R08: 0000000000000007 R09: 0000000000000001 [ 3387.910409] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880077323e40 [ 3387.910409] R13: ffff880077323f24 R14: ffff880075a0a090 R15: ffff880077323e40 [ 3387.910409] FS: 00007f8c9142a700(0000) GS:ffff88007fd00000(0000) knlGS:0000000000000000 [ 3387.910409] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 3387.910409] CR2: 0000000000000028 CR3: 000000003b264000 CR4: 00000000000006e0 [ 3387.910409] Stack: [ 3387.910409] ffff880077323d78 ffffffff8119493e ffff880077323cf8 ffffffff810dafdd [ 3387.910409] ffff880077323e40 ffff880075a0a090 ffff880077323d08 ffff880075a0a090 [ 3387.910409] ffff880077323d78 0000000000000246 ffffffff8119850c 00000000ffffff9c [ 3387.910409] Call Trace: [ 3387.910409] [] ? link_path_walk+0x21e/0x880 [ 3387.910409] [] ? trace_hardirqs_on_caller+0x10d/0x1d0 [ 3387.910409] [] ? path_openat+0x7c/0x670 [ 3387.910409] [] path_openat+0x9f/0x670 [ 3387.910409] [] do_filp_open+0x3e/0xa0 [ 3387.910409] [] ? __alloc_fd+0xce/0x120 [ 3387.910409] [] do_sys_open+0x13c/0x230 [ 3387.910409] [] ? trace_hardirqs_on_caller+0x10d/0x1d0 [ 3387.910409] [] SyS_open+0x1d/0x20 [ 3387.910409] [] system_call_fastpath+0x16/0x1b [ 3387.910409] Code: 75 e8 4c 89 e7 e8 6c 97 ab 00 4c 89 e7 66 83 4b 02 01 e8 3f 9e ab 00 8b 75 e8 eb a9 66 2e 0f 1f 84 00 00 00 00 00 55 40 f6 c6 02 <48> 8b 47 28 48 89 e5 75 07 e8 6d ff ff ff 5d c3 f6 40 50 01 0f [ 3387.910409] RIP [] inode_permission+0x5/0x50 [ 3387.910409] RSP [ 3387.910409] CR2: 0000000000000028 [ 3387.962220] ---[ end trace 548499e322d1b19e ]--- [ 3387.964470] BUG: unable to handle kernel Killed NULL pointer dereference at 0000000000000028 [ 3387.967117] IP: [] inode_permission+0x5/0x50 [ 3387.967740] PGD 7d750067 PUD 7d753067 PMD 0 [ 3387.967740] Oops: 0000 [#2] SMP [ 3387.967740] Modules linked in: [ 3387.967740] CPU: 1 PID: 1 Comm: init Tainted: G D 3.13.0-rc1+ #38 [ 3387.967740] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 [ 3387.967740] task: ffff88007d4a4010 ti: ffff88007d4a6000 task.ti: ffff88007d4a6000 [ 3387.967740] RIP: 0010:[] [] inode_permission+0x5/0x50 [ 3387.967740] RSP: 0018:ffff88007d4a7c38 EFLAGS: 00010246 [ 3387.967740] RAX: ffff88007d4a4010 RBX: ffff880005544021 RCX: ffff88007d029818 [ 3387.967740] RDX: 0000000000000002 RSI: 0000000000000081 RDI: 0000000000000000 [ 3387.967740] RBP: ffff88007d4a7ce8 R08: 0000000000000002 R09: 0000000000000001 [ 3387.967740] R10: ffff88007d4a4010 R11: 0000000000000000 R12: ffff88007d4a7dc0 [ 3387.967740] R13: 0000000000000041 R14: ffff88007d4a4010 R15: ffff88007d4a7dc0 [ 3387.967740] FS: 00007f72034b87a0(0000) GS:ffff88007fc80000(0000) knlGS:0000000000000000 [ 3387.967740] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3387.967740] CR2: 0000000000000028 CR3: 000000007ba97000 CR4: 00000000000006e0 [ 3387.967740] Stack: [ 3387.967740] ffff88007d4a7ce8 ffffffff8119493e ffffffff811a1970 ffff88007d4a7dc0 [ 3387.967740] ffffffff82225000 ffff88007d4a4010 0000000000000246 ffff88007d4a4010 [ 3387.967740] ffff88007d4a7ce8 0000000000000246 ffffffff8119594e ffffffff8116333e [ 3387.967740] Call Trace: [ 3387.967740] [] ? link_path_walk+0x21e/0x880 [ 3387.967740] [] ? __d_lookup_rcu+0x1f0/0x1f0 [ 3387.967740] [] ? path_lookupat+0x2e/0x740 [ 3387.967740] [] ? might_fault+0x3e/0x90 [ 3387.967740] [] path_lookupat+0x56/0x740 [ 3387.967740] [] ? might_fault+0x3e/0x90 [ 3387.967740] [] ? trace_hardirqs_on+0xd/0x10 [ 3387.967740] [] ? getname_flags+0x2b/0x110 [ 3387.967740] [] ? might_fault+0x3e/0x90 [ 3387.967740] [] filename_lookup.isra.55+0x2e/0x80 [ 3387.967740] [] user_path_at_empty+0x58/0xa0 [ 3387.967740] [] ? __do_page_fault+0x3be/0x550 [ 3387.967740] [] ? __restore_xstate_sig+0x228/0x530 [ 3387.967740] [] user_path_at+0xc/0x10 [ 3387.967740] [] vfs_fstatat+0x4a/0xa0 [ 3387.967740] [] vfs_stat+0x16/0x20 [ 3387.967740] [] SyS_newstat+0x15/0x30 [ 3387.967740] [] ? lockdep_sys_exit_thunk+0x35/0x67 [ 3387.967740] [] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 3387.967740] [] system_call_fastpath+0x16/0x1b [ 3387.967740] Code: 75 e8 4c 89 e7 e8 6c 97 ab 00 4c 89 e7 66 83 4b 02 01 e8 3f 9e ab 00 8b 75 e8 eb a9 66 2e 0f 1f 84 00 00 00 00 00 55 40 f6 c6 02 <48> 8b 47 28 48 89 e5 75 07 e8 6d ff ff ff 5d c3 f6 40 50 01 0f [ 3387.967740] RIP [] inode_permission+0x5/0x50 [ 3387.967740] RSP [ 3387.967740] CR2: 0000000000000028 [ 3388.034797] ---[ end trace 548499e322d1b19f ]--- [ 3388.036021] Kernel panic - not syncing: Attempted to kill init! exitcode=0x00000009 [ 3388.036021] _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs