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Date: Fri, 8 Mar 2013 21:35:17 +0200 From: Tommi Rantala <tt.rantala@...il.com> To: Jens Axboe <axboe@...nel.dk>, Andrew Morton <akpm@...ux-foundation.org>, Guo Chao <yan@...ux.vnet.ibm.com>, Tejun Heo <tj@...nel.org>, "Eric W. Biederman" <ebiederm@...ssion.com> Cc: LKML <linux-kernel@...r.kernel.org>, Dave Jones <davej@...hat.com> Subject: kernel BUG at fs/sysfs/group.c:65! Hello, Saw this while fuzzing with trinity: # ./trinity -q -l off -C20 --dangerous -c ioctl -V /dev Trinity v1.2pre Dave Jones <davej@...hat.com> [3450] Marking 64-bit syscall 16 (ioctl) as enabled [3450] Marking 32-bit syscall 54 (ioctl) as enabled Enabling syscall ioctl DANGER: RUNNING AS ROOT. Unless you are running in a virtual machine, this could cause serious problems such as overwriting CMOS or similar which could potentially make this machine unbootable without a firmware reset. ctrl-c now unless you really know what you are doing. Initial random seed from time of day: 3240298905 Kernel was tainted on startup. Will keep running if trinity causes an oops. [3451] Watchdog is alive [3450] Started watchdog process, PID is 3451 [3452] Main thread is alive. Generating file descriptors Added 340 filenames from /dev [3452] Random reseed: 291638642 [watchdog] 9738 iterations. [F:9195 S:542] [watchdog] 22504 iterations. [F:21372 S:1131] [watchdog] 33528 iterations. [F:31900 S:1627] [watchdog] 43275 iterations. [F:41135 S:2139] [watchdog] 53543 iterations. [F:50924 S:2618] [watchdog] 64605 iterations. [F:61433 S:3171] [watchdog] 74696 iterations. [F:71142 S:3553] [watchdog] 84993 iterations. [F:80899 S:4092] [ 204.920235] ------------[ cut here ]------------ [ 204.921507] WARNING: at /home/ttrantal/git/linux-2.6/fs/sysfs/dir.c:536 sysfs_add_one+0xc0/0xf0() [ 204.923672] Hardware name: Bochs [ 204.924510] sysfs: cannot create duplicate filename '/devices/virtual/bdi/7:0' [ 204.926312] Pid: 3487, comm: trinity-child14 Tainted: G W 3.9.0-rc1+ #102 [ 204.928194] Call Trace: [ 204.928830] [<ffffffff812229e0>] ? sysfs_add_one+0xc0/0xf0 [ 204.930217] [<ffffffff810975d6>] warn_slowpath_common+0x86/0xb0 [ 204.931702] [<ffffffff81097661>] warn_slowpath_fmt+0x41/0x50 [ 204.933138] [<ffffffff812229e0>] sysfs_add_one+0xc0/0xf0 [ 204.934498] [<ffffffff81222ba6>] create_dir+0x76/0xd0 [ 204.935782] [<ffffffff81222f52>] sysfs_create_dir+0xc2/0xf0 [ 204.937195] [<ffffffff8135ba7a>] kobject_add_internal+0xda/0x210 [ 204.938709] [<ffffffff81faaa85>] ? __mutex_unlock_slowpath+0x145/0x160 [ 204.940355] [<ffffffff8135bcdc>] kobject_add+0x9c/0xd0 [ 204.941668] [<ffffffff814de0cc>] device_add+0x11c/0x6d0 [ 204.943013] [<ffffffff814e821d>] ? device_pm_sleep_init+0x4d/0x80 [ 204.944554] [<ffffffff814de699>] device_register+0x19/0x20 [ 204.945978] [<ffffffff814dedab>] device_create_vargs+0xcb/0x120 [ 204.947453] [<ffffffff81170c37>] bdi_register+0x67/0x1d0 [ 204.948815] [<ffffffff8109136e>] ? kmemcheck_mark_initialized+0xe/0x10 [ 204.950445] [<ffffffff81170dc3>] bdi_register_dev+0x23/0x30 [ 204.951859] [<ffffffff8134c90b>] add_disk+0x1fb/0x4b0 [ 204.953140] [<ffffffff814f7a27>] loop_add+0x1d7/0x220 [ 204.954430] [<ffffffff814f9295>] loop_control_ioctl+0x65/0x170 [ 204.955901] [<ffffffff811b9542>] do_vfs_ioctl+0x522/0x570 [ 204.957265] [<ffffffff8130a4b3>] ? file_has_perm+0x83/0xa0 [ 204.958647] [<ffffffff811b95ed>] sys_ioctl+0x5d/0xa0 [ 204.959913] [<ffffffff813663fe>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 204.961482] [<ffffffff81faed69>] system_call_fastpath+0x16/0x1b [ 204.962922] ---[ end trace e3673bd679957e4e ]--- [ 204.964138] ------------[ cut here ]------------ [ 204.965261] WARNING: at /home/ttrantal/git/linux-2.6/lib/kobject.c:196 kobject_add_internal+0x172/0x210() [ 204.967502] Hardware name: Bochs [ 204.968300] kobject_add_internal failed for 7:0 with -EEXIST, don't try to register things with the same name in the same directory. [ 204.971062] Pid: 3487, comm: trinity-child14 Tainted: G W 3.9.0-rc1+ #102 [ 204.972873] Call Trace: [ 204.973489] [<ffffffff8135bb12>] ? kobject_add_internal+0x172/0x210 [ 204.975015] [<ffffffff810975d6>] warn_slowpath_common+0x86/0xb0 [ 204.976474] [<ffffffff81097661>] warn_slowpath_fmt+0x41/0x50 [ 204.977939] [<ffffffff8135bb12>] kobject_add_internal+0x172/0x210 [ 204.979484] [<ffffffff81faaa85>] ? __mutex_unlock_slowpath+0x145/0x160 [ 204.981221] [<ffffffff8135bcdc>] kobject_add+0x9c/0xd0 [ 204.982557] [<ffffffff814de0cc>] device_add+0x11c/0x6d0 [ 204.983972] [<ffffffff814e821d>] ? device_pm_sleep_init+0x4d/0x80 [ 204.985518] [<ffffffff814de699>] device_register+0x19/0x20 [ 204.986927] [<ffffffff814dedab>] device_create_vargs+0xcb/0x120 [ 204.988428] [<ffffffff81170c37>] bdi_register+0x67/0x1d0 [ 204.989799] [<ffffffff8109136e>] ? kmemcheck_mark_initialized+0xe/0x10 [ 204.991442] [<ffffffff81170dc3>] bdi_register_dev+0x23/0x30 [ 204.992867] [<ffffffff8134c90b>] add_disk+0x1fb/0x4b0 [ 204.994163] [<ffffffff814f7a27>] loop_add+0x1d7/0x220 [ 204.995463] [<ffffffff814f9295>] loop_control_ioctl+0x65/0x170 [ 204.996928] [<ffffffff811b9542>] do_vfs_ioctl+0x522/0x570 [ 204.998307] [<ffffffff8130a4b3>] ? file_has_perm+0x83/0xa0 [ 204.999696] [<ffffffff811b95ed>] sys_ioctl+0x5d/0xa0 [ 205.000981] [<ffffffff813663fe>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 205.002576] [<ffffffff81faed69>] system_call_fastpath+0x16/0x1b [ 205.004077] ---[ end trace e3673bd679957e4f ]--- [ 205.006169] ------------[ cut here ]------------ [ 205.007407] WARNING: at /home/ttrantal/git/linux-2.6/fs/sysfs/dir.c:536 sysfs_add_one+0xc0/0xf0() [ 205.009612] Hardware name: Bochs [ 205.010460] sysfs: cannot create duplicate filename '/dev/block/7:0' [ 205.012042] Pid: 3487, comm: trinity-child14 Tainted: G W 3.9.0-rc1+ #102 [ 205.013926] Call Trace: [ 205.014569] [<ffffffff812229e0>] ? sysfs_add_one+0xc0/0xf0 [ 205.015954] [<ffffffff810975d6>] warn_slowpath_common+0x86/0xb0 [ 205.017408] [<ffffffff81097661>] warn_slowpath_fmt+0x41/0x50 [ 205.018782] [<ffffffff812229e0>] sysfs_add_one+0xc0/0xf0 [ 205.020071] [<ffffffff81223560>] sysfs_do_create_link_sd+0x110/0x220 [ 205.021593] [<ffffffff81363f30>] ? sprintf+0x40/0x50 [ 205.022815] [<ffffffff812236aa>] sysfs_create_link+0x2a/0x40 [ 205.024195] [<ffffffff814de180>] device_add+0x1d0/0x6d0 [ 205.025465] [<ffffffff814ddeac>] ? dev_set_name+0x3c/0x40 [ 205.026784] [<ffffffff8134c954>] add_disk+0x244/0x4b0 [ 205.028024] [<ffffffff814f7a27>] loop_add+0x1d7/0x220 [ 205.029266] [<ffffffff814f9295>] loop_control_ioctl+0x65/0x170 [ 205.030669] [<ffffffff811b9542>] do_vfs_ioctl+0x522/0x570 [ 205.031992] [<ffffffff8130a4b3>] ? file_has_perm+0x83/0xa0 [ 205.033341] [<ffffffff811b95ed>] sys_ioctl+0x5d/0xa0 [ 205.034630] [<ffffffff813663fe>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 205.036316] [<ffffffff81faed69>] system_call_fastpath+0x16/0x1b [ 205.037850] ---[ end trace e3673bd679957e50 ]--- [ 205.042116] ------------[ cut here ]------------ [ 205.043027] kernel BUG at /home/ttrantal/git/linux-2.6/fs/sysfs/group.c:65! [ 205.043027] invalid opcode: 0000 [#1] SMP [ 205.043027] CPU 0 [ 205.043027] Pid: 3487, comm: trinity-child14 Tainted: G W 3.9.0-rc1+ #102 Bochs Bochs [ 205.043027] RIP: 0010:[<ffffffff8122488b>] [<ffffffff8122488b>] internal_create_group+0x2b/0x220 [ 205.043027] RSP: 0018:ffff8800762ebd08 EFLAGS: 00010246 [ 205.043027] RAX: ffff8800762f0000 RBX: ffff880045c79800 RCX: 0000000000000006 [ 205.043027] RDX: ffffffff82849980 RSI: 0000000000000000 RDI: ffff880045c79880 [ 205.043027] RBP: ffff8800762ebd58 R08: 0000000000004ec6 R09: 0000000000000001 [ 205.043027] R10: 0000000000000000 R11: 0000000000000000 R12: ffff880045c98bc8 [ 205.043027] R13: ffffffff82849980 R14: 0000000000000000 R15: ffff880045c79870 [ 205.043027] FS: 00007f3c02d78700(0000) GS:ffff88007f800000(0000) knlGS:0000000000000000 [ 205.043027] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 205.043027] CR2: 00007f7ab7af9500 CR3: 0000000076306000 CR4: 00000000000006f0 [ 205.043027] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 205.043027] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 205.043027] Process trinity-child14 (pid: 3487, threadinfo ffff8800762ea000, task ffff8800762f0000) [ 205.043027] Stack: [ 205.043027] ffff8800762ebd28 ffff880045c79880 ffff880045c99310 ffff880045c98bc8 [ 205.043027] ffff8800762ebd38 ffff880045c79800 ffff880045c98bc8 ffff880045c79800 [ 205.043027] ffff880045c79870 ffff880045c79870 ffff8800762ebd68 ffffffff81224a8e [ 205.043027] Call Trace: [ 205.043027] [<ffffffff81224a8e>] sysfs_create_group+0xe/0x10 [ 205.043027] [<ffffffff8113f2a4>] blk_trace_init_sysfs+0x14/0x20 [ 205.043027] [<ffffffff81345320>] blk_register_queue+0x100/0x130 [ 205.043027] [<ffffffff8134ca68>] add_disk+0x358/0x4b0 [ 205.043027] [<ffffffff814f7a27>] loop_add+0x1d7/0x220 [ 205.043027] [<ffffffff814f9295>] loop_control_ioctl+0x65/0x170 [ 205.043027] [<ffffffff811b9542>] do_vfs_ioctl+0x522/0x570 [ 205.043027] [<ffffffff8130a4b3>] ? file_has_perm+0x83/0xa0 [ 205.043027] [<ffffffff811b95ed>] sys_ioctl+0x5d/0xa0 [ 205.043027] [<ffffffff813663fe>] ? trace_hardirqs_on_thunk+0x3a/0x3f [ 205.043027] [<ffffffff81faed69>] system_call_fastpath+0x16/0x1b [ 205.043027] Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 28 48 85 ff 48 89 7d b8 74 11 85 f6 41 89 f6 49 89 d5 75 0c 48 83 7f 30 00 75 14 <0f> 0b 0f 1f 00 48 8b 45 b8 48 83 78 30 00 0f 84 8b 01 00 00 49 [ 205.043027] RIP [<ffffffff8122488b>] internal_create_group+0x2b/0x220 [ 205.043027] RSP <ffff8800762ebd08> [ 205.101954] ---[ end trace e3673bd679957e51 ]--- [3452] Random reseed: 1645032489 [watchdog] 90576 iterations. [F:86282 S:4293] [watchdog] 90739 iterations. [F:86445 S:4293] Tommi -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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