INFO: task syz-executor.4:19462 blocked for more than 143 seconds.
Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:28256 pid:19462 ppid:5126 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fce38e276c6
RSP: 002b:00007ffff808b6c8 EFLAGS: 00010287
RAX: 0000001b33422000 RBX: 00007fce38fac018 RCX: 0000001b33420000
RDX: 0000001b33422004 RSI: 0000001b33421688 RDI: 000000009549734c
RBP: 000000009549734c R08: 0000001b33820000 R09: 0000000095497350
R10: 00007ffff80c4090 R11: 000000000002c87c R12: 00007fce38fa0000
R13: 0000000000000001 R14: 0000000000006778 R15: ffffffff84781677
Showing all threads with locks held in the system:
task:rcu_tasks_kthre state:I
stack:29056 pid:12 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8c7929f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:rcu_tasks_trace state:I stack:29224 pid:13 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rcu_tasks_one_gp+0x484/0xcd0 kernel/rcu/tasks.h:517
rcu_tasks_kthread+0x77/0xa0 kernel/rcu/tasks.h:555
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8c7926f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xcd0 kernel/rcu/tasks.h:510
task:syslogd state:R running task stack:25488 pid:4419 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
__skb_wait_for_more_packets+0x3f8/0x5e0 net/core/datagram.c:120
__unix_dgram_recvmsg+0x206/0xb90 net/unix/af_unix.c:2458
unix_dgram_recvmsg+0xc4/0xf0 net/unix/af_unix.c:2542
sock_recvmsg_nosec net/socket.c:995 [inline]
sock_recvmsg net/socket.c:1013 [inline]
sock_recvmsg net/socket.c:1009 [inline]
sock_read_iter+0x348/0x480 net/socket.c:1086
call_read_iter include/linux/fs.h:2185 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7fa/0x930 fs/read_write.c:470
ksys_read+0x1ec/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fe4f604e8fe
RSP: 002b:00007ffd3e63dce8 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fe4f604e8fe
RDX: 00000000000000ff RSI: 00005613cb783950 RDI: 0000000000000000
RBP: 00005613cb783910 R08: 00007fe4f60de040 R09: 00007fe4f60de0c0
R10: 00007fe4f60ddfc0 R11: 0000000000000246 R12: 00005613cb7839c4
R13: 00005613cb783950 R14: 0000000000000000 R15: 0000000000000000
no locks held by syslogd/4419.
task:getty state:S stack:23336 pid:4750 ppid:1 flags:0x00000000
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x1e1/0x2a0 kernel/time/timer.c:2143
wait_woken+0x197/0x200 kernel/sched/wait.c:463
n_tty_read+0x1055/0x13e0 drivers/tty/n_tty.c:2243
iterate_tty_read drivers/tty/tty_io.c:852 [inline]
tty_read+0x30e/0x5a0 drivers/tty/tty_io.c:927
call_read_iter include/linux/fs.h:2185 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x681/0x930 fs/read_write.c:470
ksys_read+0x12b/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff8953778fe
RSP: 002b:00007fff0317c708 EFLAGS: 00000246
ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000558e75984910 RCX: 00007ff8953778fe
RDX: 0000000000000001 RSI: 00007fff0317c720 RDI: 0000000000000000
RBP: 0000558e75984970 R08: 0000000000000007 R09: 0000558e75985cd0
R10: 0000000000000063 R11: 0000000000000246 R12: 0000558e759849ac
R13: 00007fff0317c720 R14: 0000000000000000 R15: 0000558e759849ac
2 locks held by getty/4750:
#0: ffff88802866d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:244
#1:
ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
task:kworker/u4:19 state:R running task stack:25328 pid:16625 ppid:2 flags:0x00004000
Workqueue: 0x0 (bat_events)
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
worker_thread+0x160/0x1090 kernel/workqueue.c:2461
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
no locks held by kworker/u4:19/16625.
task:kworker/1:9 state:D stack:26216 pid:16711 ppid:2 flags:0x00004000
Workqueue: rcu_gp wait_rcu_exp_gp
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
schedule_timeout+0x14e/0x2a0 kernel/time/timer.c:2167
synchronize_rcu_expedited_wait_once kernel/rcu/tree_exp.h:572 [inline]
synchronize_rcu_expedited_wait kernel/rcu/tree_exp.h:624 [inline]
rcu_exp_wait_wake+0x28f/0x11c0 kernel/rcu/tree_exp.h:693
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
2 locks held by kworker/1:9/16711:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x86d/0x1750 kernel/workqueue.c:2264
#1: ffffc90005ccfda8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8a1/0x1750 kernel/workqueue.c:2268
task:syz-executor.4 state:D stack:28256 pid:19462 ppid:5126 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
rwsem_down_read_slowpath+0x5a7/0xb20 kernel/locking/rwsem.c:1095
__down_read_common kernel/locking/rwsem.c:1260 [inline]
__down_read kernel/locking/rwsem.c:1269 [inline]
down_read+0xe6/0x450 kernel/locking/rwsem.c:1511
mmap_read_lock include/linux/mmap_lock.h:117 [inline]
do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
handle_page_fault arch/x86/mm/fault.c:1519 [inline]
exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1575
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
RIP: 0033:0x7fce38e276c6
RSP: 002b:00007ffff808b6c8 EFLAGS: 00010287
RAX: 0000001b33422000 RBX: 00007fce38fac018 RCX: 0000001b33420000
RDX: 0000001b33422004 RSI: 0000001b33421688 RDI: 000000009549734c
RBP: 000000009549734c R08: 0000001b33820000 R09: 0000000095497350
R10: 00007ffff80c4090 R11: 000000000002c87c R12: 00007fce38fa0000
R13: 0000000000000001 R14: 0000000000006778 R15: ffffffff84781677
1 lock held by syz-executor.4/19462:
#0:
ffff888077dcc998
(
&mm->mmap_lock
){++++}-{3:3}
, at: mmap_read_lock include/linux/mmap_lock.h:117 [inline]
, at: do_user_addr_fault+0xa51/0x1210 arch/x86/mm/fault.c:1379
task:syz-executor.4 state:R running task stack:27224 pid:19465 ppid:5126 flags:0x0000400e
Call Trace:
5 locks held by syz-executor.4/19465:
task:syz-executor.2 state:D stack:25240 pid:22079 ppid:5118 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5252 [inline]
__schedule+0x25d0/0x5a70 kernel/sched/core.c:6570
schedule+0xde/0x1b0 kernel/sched/core.c:6646
synchronize_rcu_expedited+0x5e2/0x770 kernel/rcu/tree_exp.h:1005
namespace_unlock+0x1af/0x410 fs/namespace.c:1602
drop_collected_mounts fs/namespace.c:2089 [inline]
put_mnt_ns fs/namespace.c:4554 [inline]
put_mnt_ns+0x10a/0x150 fs/namespace.c:4550
mount_subtree+0x23e/0x480 fs/namespace.c:3658
mount_subvol fs/btrfs/super.c:1384 [inline]
btrfs_mount+0x27c/0xa90 fs/btrfs/super.c:1612
legacy_get_tree+0x109/0x220 fs/fs_context.c:610
vfs_get_tree+0x8d/0x2f0 fs/super.c:1489
do_new_mount fs/namespace.c:3145 [inline]
path_mount+0x132a/0x1e20 fs/namespace.c:3475
do_mount fs/namespace.c:3488 [inline]
__do_sys_mount fs/namespace.c:3697 [inline]
__se_sys_mount fs/namespace.c:3674 [inline]
__x64_sys_mount+0x283/0x300 fs/namespace.c:3674
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f313d88d5fa
RSP: 002b:00007f313e631f88 EFLAGS: 00000202
ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 000000000000559e RCX: 00007f313d88d5fa
RDX: 00000000200055c0 RSI: 0000000020005600 RDI: 00007f313e631fe0
RBP: 00007f313e632020 R08: 00007f313e632020 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000202 R12: 00000000200055c0
R13: 0000000020005600 R14: 00007f313e631fe0 R15: 0000000020000000
1 lock held by syz-executor.2/22079:
#0:
ffffffff8c79e6b8
(
rcu_state.exp_mutex
){+.+.}-{3:3}
, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
, at: synchronize_rcu_expedited+0x658/0x770 kernel/rcu/tree_exp.h:990
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x24/0x18a lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x32f/0x3c0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xcae/0x1050 kernel/hung_task.c:377
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16627 Comm: kworker/u4:20 Not tainted 6.2.0-rc3-next-20230109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: phy13 ieee80211_iface_work
RIP: 0010:write_comp_data+0x7/0x90 kernel/kcov.c:230
Code: 81 e2 00 01 ff 00 75 10 65 48 8b 04 25 80 b8 03 00 48 8b 80 68 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 d1 0f 82 7e <49> 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25
RSP: 0018:ffffc9000621fa30 EFLAGS: 00000286
RAX: 0000000080000000 RBX: ffff888021359800 RCX: ffffffff813926ac
RDX: ffff8880a1359800 RSI: ffff888021359800 RDI: 0000000000000006
RBP: ffff8880a1359800 R08: 0000000000000001 R09: ffffffff91350baf
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000000
R13: ffff888021a88c80 R14: 000000000000004c R15: 0005f1d42f113a43
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ac442dfdf8 CR3: 000000003c468000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__phys_addr+0x2c/0x140 arch/x86/mm/physaddr.c:20
virt_to_folio include/linux/mm.h:1001 [inline]
kfree+0x49/0x1b0 mm/slab_common.c:1011
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1ac3/0x3030 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline]
ieee80211_iface_work+0xa4d/0xd70 net/mac80211/iface.c:1635
process_one_work+0x9bf/0x1750 kernel/workqueue.c:2293
worker_thread+0x669/0x1090 kernel/workqueue.c:2440
kthread+0x2e8/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308