INFO: task syz-executor.5:10305 blocked for more than 143 seconds. Not tainted 5.14.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27560 pid:10305 ppid: 8806 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1854 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 kthread_stop+0x104/0x4f0 kernel/kthread.c:648 ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255 ext4_fill_super+0x74d9/0xbee0 fs/ext4/super.c:5186 mount_bdev+0x2cb/0x3b0 fs/super.c:1368 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x7f3/0x1a40 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount fs/namespace.c:3433 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007fd89ce29fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007fd89ce2a000 RBP: 00007fd89ce2a040 R08: 00007fd89ce2a040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007fd89ce2a000 R15: 0000000020000200 INFO: task syz-executor.1:10316 blocked for more than 143 seconds. Not tainted 5.14.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27816 pid:10316 ppid: 8800 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x907/0x26b0 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 schedule_timeout+0x19d/0x250 kernel/time/timer.c:1854 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 kthread_stop+0x104/0x4f0 kernel/kthread.c:648 ext4_stop_mmpd+0x34/0xb0 fs/ext4/mmp.c:255 ext4_fill_super+0x74d9/0xbee0 fs/ext4/super.c:5186 mount_bdev+0x2cb/0x3b0 fs/super.c:1368 legacy_get_tree+0xfa/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x7f/0x2c0 fs/super.c:1498 do_new_mount fs/namespace.c:2905 [inline] path_mount+0x7f3/0x1a40 fs/namespace.c:3235 do_mount fs/namespace.c:3248 [inline] __do_sys_mount fs/namespace.c:3456 [inline] __se_sys_mount fs/namespace.c:3433 [inline] __x64_sys_mount+0x1f5/0x260 fs/namespace.c:3433 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x467afa RSP: 002b:00007f4453c06fa8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000380 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 00000000200000c0 RDI: 00007f4453c07000 RBP: 00007f4453c07040 R08: 00007f4453c07040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020000000 R13: 00000000200000c0 R14: 00007f4453c07000 R15: 0000000020000200 Showing all locks held in the system: 2 locks held by kworker/u4:1/10: 1 lock held by khungtaskd/1656: #0: ffffffff8ab72040 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 2 locks held by in:imklog/8103: #0: ffff88801573a370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x9c/0xb0 fs/file.c:974 #1: ffff8880b9e35a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:460 [inline] #1: ffff8880b9e35a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1307 [inline] #1: ffff8880b9e35a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1610 [inline] #1: ffff8880b9e35a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x233/0x26b0 kernel/sched/core.c:5854 1 lock held by syz-executor.5/10305: #0: ffff88802c5640e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 1 lock held by syz-executor.1/10316: #0: ffff88801be900e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x192/0xa00 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1656 Comm: khungtaskd Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x57/0x7d lib/dump_stack.c:105 nmi_cpu_backtrace.cold+0x30/0x99 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x11f/0x170 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0x92e/0xc40 kernel/hung_task.c:295 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 5.14.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy12 ieee80211_iface_work RIP: 0010:ieee80211_ibss_process_chanswitch.constprop.0+0x5c7/0xbc0 net/mac80211/ibss.c:774 Code: 85 31 04 00 00 49 8b 7d 40 ba 01 00 00 00 4c 89 e6 e8 7d 92 f0 ff 85 c0 7f 75 41 b8 01 00 00 00 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 c7 43 38 00 RSP: 0018:ffffc90000cf73d0 EFLAGS: 00000202 RAX: dffffc0000000000 RBX: 1ffff9200019ee7d RCX: 0000000000000000 RDX: dffffc0000000000 RSI: ffffc90000cf7408 RDI: ffffc90000cf7870 RBP: 0000000000000c10 R08: 0000000000000000 R09: ffffc90000cf7408 R10: fffff5200019ee86 R11: 0000000000000000 R12: ffff888037111a38 R13: ffffc90000cf7458 R14: ffffc90000cf7760 R15: ffff888037110c00 FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f574ace5000 CR3: 000000000a88e000 CR4: 0000000000350ee0 Call Trace: ieee80211_rx_bss_info net/mac80211/ibss.c:1154 [inline] ieee80211_rx_mgmt_probe_beacon+0x9a9/0x1630 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xaf0/0x12e0 net/mac80211/ibss.c:1642 ieee80211_iface_process_skb net/mac80211/iface.c:1426 [inline] ieee80211_iface_work+0x5f5/0x810 net/mac80211/iface.c:1462 process_one_work+0x84c/0x13d0 kernel/workqueue.c:2276 worker_thread+0x598/0x1040 kernel/workqueue.c:2422 kthread+0x38b/0x460 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295