Messages in this thread | | | Date | Wed, 06 Jun 2018 06:31:02 -0700 | Subject | kernel BUG at fs/btrfs/volumes.c:LINE! | From | syzbot <> |
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Hello,
syzbot found the following crash on:
HEAD commit: af6c5d5e01ad Merge branch 'for-4.18' of git://git.kernel.o.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15f700af800000 kernel config: https://syzkaller.appspot.com/x/.config?x=12ff770540994680 dashboard link: https://syzkaller.appspot.com/bug?extid=5b658d997a83984507a6 compiler: gcc (GCC) 8.0.1 20180413 (experimental)
Unfortunately, I don't have any reproducer for this crash yet.
IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+5b658d997a83984507a6@syzkaller.appspotmail.com
RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007f787067fbf0 RBP: 0000000000000001 R08: 00000000200000c0 R09: 0000000020000080 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000014 R13: 0000000000000001 R14: 0000000000700008 R15: 0000000000000043 ------------[ cut here ]------------ kernel BUG at fs/btrfs/volumes.c:1032! invalid opcode: 0000 [#1] SMP KASAN CPU: 1 PID: 22303 Comm: syz-executor1 Not tainted 4.17.0+ #86 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:btrfs_prepare_close_one_device fs/btrfs/volumes.c:1032 [inline] RIP: 0010:close_fs_devices+0xba7/0xfa0 fs/btrfs/volumes.c:1052 Code: 56 18 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2b 03 00 00 49 83 6c 24 30 01 e9 25 f8 ff ff e8 90 f4 b3 fe 0f 0b e8 89 f4 b3 fe <0f> 0b 48 89 f7 e8 ef 64 f0 fe e9 f6 f5 ff ff e8 75 f4 b3 fe 0f 0b RSP: 0018:ffff8801af6ff050 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000c70c000 RDX: 0000000000040000 RSI: ffffffff82c56437 RDI: 0000000000000286 RBP: ffff8801af6ff350 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: ffff8801c58ac190 R13: 0000000000000000 R14: ffff8801b1a6a940 R15: ffff8801b4d7d680 FS: 00007f7870680700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000704094 CR3: 00000001c51e8000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: btrfs_close_devices+0x29/0x150 fs/btrfs/volumes.c:1085 btrfs_mount_root+0x1419/0x1e70 fs/btrfs/super.c:1610 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount+0x40/0x60 fs/namespace.c:1027 btrfs_mount+0x4a1/0x213e fs/btrfs/super.c:1661 mount_fs+0xae/0x328 fs/super.c:1277 vfs_kern_mount.part.34+0xd4/0x4d0 fs/namespace.c:1037 vfs_kern_mount fs/namespace.c:1027 [inline] do_new_mount fs/namespace.c:2518 [inline] do_mount+0x564/0x30b0 fs/namespace.c:2848 ksys_mount+0x12d/0x140 fs/namespace.c:3064 __do_sys_mount fs/namespace.c:3078 [inline] __se_sys_mount fs/namespace.c:3075 [inline] __x64_sys_mount+0xbe/0x150 fs/namespace.c:3075 do_syscall_64+0x1b1/0x800 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45843a Code: b8 a6 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd 8f fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba 8f fb ff c3 66 0f 1f 84 00 00 00 00 00 RSP: 002b:00007f787067fba8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 000000000045843a RDX: 0000000020000080 RSI: 0000000020000040 RDI: 00007f787067fbf0 RBP: 0000000000000001 R08: 00000000200000c0 R09: 0000000020000080 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000014 R13: 0000000000000001 R14: 0000000000700008 R15: 0000000000000043 Modules linked in: Dumping ftrace buffer: (ftrace buffer empty) ---[ end trace 383b0406a01f2edd ]--- RIP: 0010:btrfs_prepare_close_one_device fs/btrfs/volumes.c:1032 [inline] RIP: 0010:close_fs_devices+0xba7/0xfa0 fs/btrfs/volumes.c:1052 Code: 56 18 48 89 f8 48 c1 e8 03 80 3c 18 00 0f 85 2b 03 00 00 49 83 6c 24 30 01 e9 25 f8 ff ff e8 90 f4 b3 fe 0f 0b e8 89 f4 b3 fe <0f> 0b 48 89 f7 e8 ef 64 f0 fe e9 f6 f5 ff ff e8 75 f4 b3 fe 0f 0b RSP: 0018:ffff8801af6ff050 EFLAGS: 00010246 RAX: 0000000000040000 RBX: dffffc0000000000 RCX: ffffc9000c70c000 RDX: 0000000000040000 RSI: ffffffff82c56437 RDI: 0000000000000286 RBP: ffff8801af6ff350 R08: ffffed003b5e46d7 R09: ffffed003b5e46d6 R10: ffffed003b5e46d6 R11: ffff8801daf236b3 R12: ffff8801c58ac190 R13: 0000000000000000 R14: ffff8801b1a6a940 R15: ffff8801b4d7d680 FS: 00007f7870680700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000704094 CR3: 00000001c51e8000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
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