Hello, Thanks for your report! On Mon, Jun 10, 2019 at 09:05:07PM -0700, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: d1fdb6d8 Linux 5.2-rc4 > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=105ade6aa00000 > kernel config: https://syzkaller.appspot.com/x/.config?x=fa9f7e1b6a8bb586 > dashboard link: https://syzkaller.appspot.com/bug?extid=b9d0d56867048c7bcfde > compiler: gcc (GCC) 9.0.0 20181231 (experimental) > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11c67dd2a00000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=154be66aa00000 > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+b9d0d56867048c7bcfde@xxxxxxxxxxxxxxxxxxxxxxxxx > > Code: e8 bc b5 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff > 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f735bcf2d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004466e9 > RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 > RBP: 00000000006dbc30 R08: 0000000000000002 R09: 0000000000003034 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c > R13: 00007f735bcf2d90 R14: 0000000000000004 R15: 20c49ba5e353f7cf > WARNING: CPU: 0 PID: 9739 at block/blk-mq-sched.c:558 > blk_mq_sched_free_requests+0x207/0x290 block/blk-mq-sched.c:558 > Kernel panic - not syncing: panic_on_warn set ... > CPU: 0 PID: 9739 Comm: syz-executor118 Not tainted 5.2.0-rc4 #25 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x172/0x1f0 lib/dump_stack.c:113 > panic+0x2cb/0x744 kernel/panic.c:219 > __warn.cold+0x20/0x4d kernel/panic.c:576 > report_bug+0x263/0x2b0 lib/bug.c:186 > fixup_bug arch/x86/kernel/traps.c:179 [inline] > fixup_bug arch/x86/kernel/traps.c:174 [inline] > do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:272 > do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:291 > invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:986 > RIP: 0010:blk_mq_sched_free_requests+0x207/0x290 block/blk-mq-sched.c:558 > Code: ff e8 6d bf 30 fe 31 ff 89 c3 89 c6 e8 32 ac 4a fe 85 db 0f 85 68 fe > ff ff e8 a5 aa 4a fe 0f 0b e9 5c fe ff ff e8 99 aa 4a fe <0f> 0b e9 7f fe ff > ff 48 c7 c7 b4 e5 80 89 e8 b6 48 83 fe e9 28 fe > RSP: 0018:ffff88808ab9fa60 EFLAGS: 00010293 > RAX: ffff88808c9f6340 RBX: 0000000000000001 RCX: ffffffff8326000e > RDX: 0000000000000000 RSI: ffffffff83260027 RDI: ffff88809f27b020 > RBP: ffff88808ab9fab0 R08: ffff88808c9f6340 R09: ffffed1015d06be0 > R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: 00000000fffffff4 > R13: ffff88809f27b008 R14: ffff88809ec4e658 R15: ffff88809f27b008 > blk_mq_init_sched+0x32c/0x770 block/blk-mq-sched.c:542 > elevator_init_mq+0xcd/0x160 block/elevator.c:622 > blk_mq_init_allocated_queue+0x10e2/0x15b0 block/blk-mq.c:2921 > blk_mq_init_queue+0x62/0xb0 block/blk-mq.c:2705 > loop_add+0x2dd/0x8d0 drivers/block/loop.c:2004 > loop_control_ioctl drivers/block/loop.c:2157 [inline] > loop_control_ioctl+0x165/0x360 drivers/block/loop.c:2139 > vfs_ioctl fs/ioctl.c:46 [inline] > file_ioctl fs/ioctl.c:509 [inline] > do_vfs_ioctl+0xd5f/0x1380 fs/ioctl.c:696 > ksys_ioctl+0xab/0xd0 fs/ioctl.c:713 > __do_sys_ioctl fs/ioctl.c:720 [inline] > __se_sys_ioctl fs/ioctl.c:718 [inline] > __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:718 > do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 > entry_SYSCALL_64_after_hwframe+0x49/0xbe > RIP: 0033:0x4466e9 > Code: e8 bc b5 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 00 48 89 f8 48 89 f7 > 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff > 0f 83 2b 09 fc ff c3 66 2e 0f 1f 84 00 00 00 00 > RSP: 002b:00007f735bcf2d88 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 > RAX: ffffffffffffffda RBX: 00000000006dbc38 RCX: 00000000004466e9 > RDX: 0000000000000000 RSI: 0000000000004c80 RDI: 0000000000000003 > RBP: 00000000006dbc30 R08: 0000000000000002 R09: 0000000000003034 > R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc3c > R13: 00007f735bcf2d90 R14: 0000000000000004 R15: 20c49ba5e353f7cf > Kernel Offset: disabled > Rebooting in 86400 seconds.. > Patch has been posted out: https://lore.kernel.org/linux-block/20190611093153.7147-1-ming.lei@xxxxxxxxxx/T/#u Thanks, Ming
