IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready Bluetooth: hci8: command 0x0409 tx timeout Bluetooth: hci8: command 0x041b tx timeout Bluetooth: hci8: command 0x040f tx timeout Bluetooth: hci8: command 0x0419 tx timeout INFO: task syz-executor.4:32672 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 D26920 32672 8159 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_read_failed_common kernel/locking/rwsem-xadd.c:292 [inline] rwsem_down_read_failed+0x20a/0x390 kernel/locking/rwsem-xadd.c:309 call_rwsem_down_read_failed+0x14/0x30 arch/x86/lib/rwsem.S:94 __down_read arch/x86/include/asm/rwsem.h:83 [inline] down_read+0x44/0x80 kernel/locking/rwsem.c:26 iterate_supers+0xdb/0x290 fs/super.c:631 quota_sync_all fs/quota/quota.c:67 [inline] kernel_quotactl+0x67b/0x1330 fs/quota/quota.c:855 __do_sys_quotactl fs/quota/quota.c:893 [inline] __se_sys_quotactl fs/quota/quota.c:890 [inline] __x64_sys_quotactl+0x93/0xf0 fs/quota/quota.c:890 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fd0878c20f9 Code: Bad RIP value. RSP: 002b:00007fd085e34168 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3 RAX: ffffffffffffffda RBX: 00007fd0879e1f80 RCX: 00007fd0878c20f9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0040000080000101 RBP: 00007fd08791dae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff7ae4f38f R14: 00007fd085e34300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1571: #0: 0000000013b7c3aa (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441 1 lock held by in:imklog/7773: #0: 00000000adbf7cde (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 1 lock held by syz-executor.1/28670: #0: 0000000066fe7988 (&type->s_umount_key#84/1){+.+.}, at: alloc_super fs/super.c:226 [inline] #0: 0000000066fe7988 (&type->s_umount_key#84/1){+.+.}, at: sget_userns+0x20b/0xcd0 fs/super.c:519 1 lock held by syz-executor.4/32672: #0: 0000000066fe7988 (&type->s_umount_key#85){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.4/692: #0: 0000000066fe7988 (&type->s_umount_key#85){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 1 lock held by syz-executor.4/1042: #0: 0000000066fe7988 (&type->s_umount_key#85){++++}, at: iterate_supers+0xdb/0x290 fs/super.c:631 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1571 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4694 Comm: systemd-journal Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 RIP: 0010:filename_parentat+0x4cf/0x590 fs/namei.c:2399 Code: ff ff 89 c3 e9 01 fd ff ff e8 0d c5 bb ff 4c 89 f2 be 20 00 00 00 4c 89 ff e8 7d 92 ff ff 89 c3 e9 ff fc ff ff e8 f1 c4 bb ff <4c> 89 e7 4c 63 e3 e8 56 f4 ff ff e9 e7 fd ff ff 4c 89 ef e8 09 a4 RSP: 0018:ffff8880a0e57bf8 EFLAGS: 00000293 RAX: ffff8880a0e4a600 RBX: 00000000fffffffe RCX: ffffffff81a6bd87 RDX: 0000000000000000 RSI: ffffffff81a6c07f RDI: 0000000000000005 RBP: ffff8880a0e57da0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a99cae80 R13: ffff8880a0e57df0 R14: ffff8880a0e57eb0 R15: ffff8880a0e57c38 FS: 00007ff89ca628c0(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff898601000 CR3: 00000000a1079000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: filename_create+0x9e/0x490 fs/namei.c:3621 user_path_create fs/namei.c:3696 [inline] do_mkdirat+0xa0/0x2d0 fs/namei.c:3834 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7ff89bd1d687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd2268eb18 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd22691b80 RCX: 00007ff89bd1d687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055c2137fc8a0 RBP: 00007ffd2268eb50 R08: 000055c2126cd3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055c2137fc8a0 R15: 00007ffd2268f190