On Wed, Nov 1, 2017 at 9:38 PM, syzbot bot+31681772ec7a18dde8d3f8caf475f361a89b9514@syzkaller.appspotmail.com wrote:
Hello,
syzkaller hit the following crash on fc2e8b1a47c14b22c33eb087fca0db58e1f4ed0e git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/master compiler: gcc (GCC) 7.1.1 20170620 .config is attached Raw console output is attached. C reproducer is attached syzkaller reproducer is attached. See https://goo.gl/kgGztJ for information about syzkaller reproducers
This also happened on more recent commits, including upstream 9c323bff13f92832e03657cabdd70d731408d621 (Oct 20):
device gre0 entered promiscuous mode BUG: unable to handle kernel paging request at ffffc90001688000 IP: snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 PGD 1dac75067 P4D 1dac75067 PUD 1dac76067 PMD 1c1dd3067 PTE 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 1 PID: 18947 Comm: syz-executor2 Not tainted 4.14.0-rc5+ #51 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801d92c8140 task.stack: ffff8801c2ef0000 RIP: 0010:snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 RSP: 0018:ffff8801c2ef6db0 EFLAGS: 00010246 RAX: ffffed00385dedbf RBX: ffffc90001688000 RCX: ffff8801c2ef6df9 RDX: 000000000000554e RSI: ffffffff83d4c556 RDI: 0000000000000282 RBP: ffff8801c2ef6e60 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000400000a0 R13: ffff8801c2ef6e38 R14: ffffc90001688001 R15: dffffc0000000000 FS: 0000000000000000(0000) GS:ffff8801db300000(0063) knlGS:00000000f76ffb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: ffffc90001688000 CR3: 00000001d0650000 CR4: 00000000001406e0 DR0: 0000000020000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: send_midi_event sound/core/seq/oss/seq_oss_midi.c:616 [inline] snd_seq_oss_midi_input+0xd39/0x1040 sound/core/seq/oss/seq_oss_midi.c:535 snd_seq_oss_event_input+0x15d/0x220 sound/core/seq/oss/seq_oss_event.c:439 snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 sound/core/seq/seq_clientmgr.c:621 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:676 [inline] snd_seq_deliver_event+0x318/0x790 sound/core/seq/seq_clientmgr.c:807 snd_seq_kernel_client_dispatch+0x11e/0x150 sound/core/seq/seq_clientmgr.c:2313 dummy_input+0x2c4/0x400 sound/core/seq/seq_dummy.c:104 snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 sound/core/seq/seq_clientmgr.c:621 snd_seq_deliver_event+0x12c/0x790 sound/core/seq/seq_clientmgr.c:818 snd_seq_dispatch_event+0x105/0x5b0 sound/core/seq/seq_clientmgr.c:892 snd_seq_check_queue.part.3+0x38e/0x510 sound/core/seq/seq_queue.c:285 snd_seq_check_queue sound/core/seq/seq_queue.c:357 [inline] snd_seq_enqueue_event+0x32d/0x3d0 sound/core/seq/seq_queue.c:363 snd_seq_client_enqueue_event+0x21b/0x420 sound/core/seq/seq_clientmgr.c:951 kernel_client_enqueue.part.10+0xb5/0xd0 sound/core/seq/seq_clientmgr.c:2252 kernel_client_enqueue sound/core/seq/seq_clientmgr.c:2242 [inline] snd_seq_kernel_client_enqueue_blocking+0xcf/0x110 sound/core/seq/seq_clientmgr.c:2279 insert_queue sound/core/seq/oss/seq_oss_rw.c:189 [inline] snd_seq_oss_write+0x5fe/0xa80 sound/core/seq/oss/seq_oss_rw.c:148 odev_write+0x64/0x90 sound/core/seq/oss/seq_oss.c:177 __vfs_write+0xef/0x970 fs/read_write.c:479 __kernel_write+0xf8/0x350 fs/read_write.c:500 write_pipe_buf+0x175/0x220 fs/splice.c:797 splice_from_pipe_feed fs/splice.c:502 [inline] __splice_from_pipe+0x328/0x730 fs/splice.c:626 splice_from_pipe+0x1e9/0x330 fs/splice.c:661 default_file_splice_write+0x40/0x90 fs/splice.c:809 do_splice_from fs/splice.c:851 [inline] do_splice fs/splice.c:1147 [inline] SYSC_splice fs/splice.c:1402 [inline] SyS_splice+0x7b7/0x1610 fs/splice.c:1382 do_syscall_32_irqs_on arch/x86/entry/common.c:329 [inline] do_fast_syscall_32+0x3f2/0xf05 arch/x86/entry/common.c:391 entry_SYSENTER_compat+0x51/0x60 arch/x86/entry/entry_64_compat.S:124 RIP: 0023:0xf7f03c79 RSP: 002b:00000000f76ff01c EFLAGS: 00000296 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 0000000000000014 RCX: 0000000000000000 RDX: 0000000000000013 RSI: 0000000000000000 RDI: 000000005813dd57 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Code: d9 4c 8d 73 01 48 c1 e8 03 83 e1 07 42 0f b6 04 38 38 c8 7f 08 84 c0 0f 85 bf 00 00 00 48 8b 85 58 ff ff ff 48 8b 8d 68 ff ff ff <41> 0f b6 5e ff 0f b6 00 83 e1 07 38 c8 7f 08 84 c0 0f 85 89 00 RIP: snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 RSP: ffff8801c2ef6db0 CR2: ffffc90001688000 ---[ end trace c7c98a599517e76d ]---
IP: snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 PGD 1dac75067 P4D 1dac75067 PUD 1dac76067 PMD 1c1cd3067 PTE 0 Oops: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 3012 Comm: syzkaller659314 Not tainted 4.14.0-rc1-next-20170918+ #24 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff8801ce930000 task.stack: ffff8801ce650000 RIP: 0010:snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 RSP: 0018:ffff8801ce657208 EFLAGS: 00010246 RAX: ffffed0039ccae4a RBX: ffffc900016f4000 RCX: ffff8801ce657251 RDX: 0000000000000000 RSI: 1ffff10039d26117 RDI: 0000000000000282 RBP: ffff8801ce6572b8 R08: ffff8801d807ab50 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 000000003fffffa4 R13: ffff8801ce657290 R14: ffffc900016f4001 R15: dffffc0000000000 FS: 00007f9079b19700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc900016f4000 CR3: 00000001ce47d000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: send_midi_event sound/core/seq/oss/seq_oss_midi.c:616 [inline] snd_seq_oss_midi_input+0xd39/0x1040 sound/core/seq/oss/seq_oss_midi.c:535 snd_seq_oss_event_input+0x15d/0x220 sound/core/seq/oss/seq_oss_event.c:439 snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 sound/core/seq/seq_clientmgr.c:621 deliver_to_subscribers sound/core/seq/seq_clientmgr.c:676 [inline] snd_seq_deliver_event+0x318/0x790 sound/core/seq/seq_clientmgr.c:807 snd_seq_kernel_client_dispatch+0x11e/0x150 sound/core/seq/seq_clientmgr.c:2309 dummy_input+0x2c4/0x400 sound/core/seq/seq_dummy.c:104 snd_seq_deliver_single_event.constprop.11+0x2fb/0x940 sound/core/seq/seq_clientmgr.c:621 snd_seq_deliver_event+0x12c/0x790 sound/core/seq/seq_clientmgr.c:818 snd_seq_dispatch_event+0x105/0x5b0 sound/core/seq/seq_clientmgr.c:892 snd_seq_check_queue.part.3+0x38e/0x510 sound/core/seq/seq_queue.c:285 snd_seq_check_queue sound/core/seq/seq_queue.c:357 [inline] snd_seq_enqueue_event+0x32d/0x3d0 sound/core/seq/seq_queue.c:363 snd_seq_client_enqueue_event+0x21b/0x420 sound/core/seq/seq_clientmgr.c:951 kernel_client_enqueue.part.10+0xb5/0xd0 sound/core/seq/seq_clientmgr.c:2248 kernel_client_enqueue sound/core/seq/seq_clientmgr.c:2238 [inline] snd_seq_kernel_client_enqueue_blocking+0xcf/0x110 sound/core/seq/seq_clientmgr.c:2275 insert_queue sound/core/seq/oss/seq_oss_rw.c:189 [inline] snd_seq_oss_write+0x5fe/0xa80 sound/core/seq/oss/seq_oss_rw.c:148 odev_write+0x64/0x90 sound/core/seq/oss/seq_oss.c:177 __vfs_write+0xef/0x970 fs/read_write.c:479 vfs_write+0x18f/0x510 fs/read_write.c:543 SYSC_write fs/read_write.c:588 [inline] SyS_write+0xef/0x220 fs/read_write.c:580 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x446469 RSP: 002b:00007f9079b18dc8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000446469 RDX: 0000000000000150 RSI: 0000000020e7f000 RDI: 0000000000000003 RBP: 0000000000000082 R08: 00007f9079b19700 R09: 00007f9079b19700 R10: 00007f9079b19700 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe543fcc1f R14: 00007f9079b199c0 R15: 0000000000000000 Code: d9 4c 8d 73 01 48 c1 e8 03 83 e1 07 42 0f b6 04 38 38 c8 7f 08 84 c0 0f 85 bf 00 00 00 48 8b 85 58 ff ff ff 48 8b 8d 68 ff ff ff <41> 0f b6 5e ff 0f b6 00 83 e1 07 38 c8 7f 08 84 c0 0f 85 89 00 RIP: snd_seq_oss_readq_puts+0x146/0x210 sound/core/seq/oss/seq_oss_readq.c:112 RSP: ffff8801ce657208 CR2: ffffc900016f4000 ---[ end trace cc8c763aca15dec8 ]---
This bug is generated by a dumb bot. It may contain errors. See https://goo.gl/tpsmEJ for details. Direct all questions to syzkaller@googlegroups.com. Please credit me with: Reported-by: syzbot syzkaller@googlegroups.com
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