IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready Bluetooth: hci8: command 0x041b tx timeout Bluetooth: hci6: command 0x0406 tx timeout Bluetooth: hci8: command 0x040f tx timeout Bluetooth: hci8: command 0x0419 tx timeout INFO: task syz-executor.4:19319 blocked for more than 140 seconds. Not tainted 4.19.211-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. syz-executor.4 D28504 19319 19059 0x00000004 Call Trace: context_switch kernel/sched/core.c:2828 [inline] __schedule+0x887/0x2040 kernel/sched/core.c:3517 schedule+0x8d/0x1b0 kernel/sched/core.c:3561 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:589 [inline] rwsem_down_write_failed+0x3aa/0x760 kernel/locking/rwsem-xadd.c:618 call_rwsem_down_write_failed+0x13/0x20 arch/x86/lib/rwsem.S:117 __down_write arch/x86/include/asm/rwsem.h:142 [inline] down_write+0x4f/0x90 kernel/locking/rwsem.c:72 grab_super+0xa2/0x350 fs/super.c:383 sget_userns+0x352/0xcd0 fs/super.c:511 sget+0x102/0x140 fs/super.c:570 mount_bdev+0xf8/0x3b0 fs/super.c:1131 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7efff1d1b0a9 Code: Bad RIP value. RSP: 002b:00007efff028d168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007efff1e3af80 RCX: 00007efff1d1b0a9 RDX: 0000000020000580 RSI: 0000000020000540 RDI: 0000000020000140 RBP: 00007efff1d76ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd5bce86ff R14: 00007efff028d300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1557: #0: 000000001c99a903 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7787: #0: 0000000075e6b488 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.4/18864: 2 locks held by syz-executor.4/19319: #0: 0000000036b0b74b (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 #1: 000000000f27272b (&type->s_umount_key#107){+.+.}, at: grab_super+0xa2/0x350 fs/super.c:383 1 lock held by syz-executor.4/19661: #0: 0000000036b0b74b (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 1 lock held by syz-executor.4/19992: #0: 0000000036b0b74b (&bdev->bd_fsfreeze_mutex){+.+.}, at: mount_bdev+0x90/0x3b0 fs/super.c:1125 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1557 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline] watchdog+0x991/0xe60 kernel/hung_task.c:287 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4688 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:_copy_to_user+0x4/0x100 lib/usercopy.c:24 Code: ff ff ff e8 5e 6c ec fd 4c 29 e3 4c 89 e2 31 f6 49 8d 7c 1d 00 e8 7c 3c 22 fe eb a7 e8 35 49 22 fe e9 4c ff ff ff 41 57 41 56 <41> 55 41 54 49 89 fc 55 48 89 f5 53 48 89 d3 e8 28 6c ec fd be 19 RSP: 0018:ffff8880a13afb98 EFLAGS: 00000293 RAX: ffff8880a13a4480 RBX: 0000000000002000 RCX: ffffffff81a0fb8b RDX: 0000000000000037 RSI: ffff8880a0f48868 RDI: 00007ffc08468c60 RBP: ffffffff8d203120 R08: 0000000000000037 R09: ffff8880a0f48868 R10: 0000000000000006 R11: 0000000000000000 R12: 0000000000000037 R13: ffff8880a0f48868 R14: fffffffffffffff2 R15: 0000000000000034 FS: 00007fd8d3ad48c0(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd8d0bde020 CR3: 00000000a1097000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: copy_to_user include/linux/uaccess.h:155 [inline] devkmsg_read+0x686/0xae0 kernel/printk/printk.c:894 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd8d3063210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 RSP: 002b:00007ffc084683e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffc0846ae60 RCX: 00007fd8d3063210 RDX: 0000000000002000 RSI: 00007ffc08468c60 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000008 R09: 0000013a1b4cbf92 R10: 001923fa41fe1a4a R11: 0000000000000246 R12: 00007ffc08468c60 R13: 00007ffc0846adb8 R14: 0000560ac7046958 R15: 0005f0e3a2941dc2