INFO: task syz-executor.5:9051 blocked for more than 143 seconds.
Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:25000 pid:9051 ppid:5113 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
coredump_task_exit+0x2c5/0x3a0 kernel/exit.c:432
do_exit+0x29a/0x2290 kernel/exit.c:819
do_group_exit+0x206/0x2c0 kernel/exit.c:1019
get_signal+0x1701/0x17e0 kernel/signal.c:2859
arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efec248c169
RSP: 002b:00007fff9f7beb88 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffdfc RBX: 00007efec25ac05c RCX: 00007efec248c169
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007efec25ac05c
RBP: 00007efec25abf80 R08: 0000000000000010 R09: 00000000000000d0
R10: 00007fff9f7bec70 R11: 0000000000000246 R12: 00000000000543bb
R13: 00007fff9f7bec70 R14: 00007fff9f7bec90 R15: 0000000000000032
INFO: task syz-executor.5:9098 blocked for more than 144 seconds.
Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:28184 pid:9098 ppid:5113 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5307 [inline]
__schedule+0x173b/0x4630 kernel/sched/core.c:6625
schedule+0xc3/0x180 kernel/sched/core.c:6701
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2143
do_wait_for_common+0x449/0x5f0 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion_state+0x4c/0x70 kernel/sched/completion.c:254
coredump_wait fs/coredump.c:412 [inline]
do_coredump+0x9f9/0x2980 fs/coredump.c:569
get_signal+0x145e/0x17e0 kernel/signal.c:2845
arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:297
do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7efec248c169
RSP: 002b:00007efec3212168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffe5 RBX: 00007efec25ac050 RCX: 00007efec248c169
RDX: 0000000000000000 RSI: 0000000080000001 RDI: 0000000000000007
RBP: 00007efec24e7ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff9f7beb0f R14: 00007efec3212300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cf25570 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cf25d70 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
#0: ffffffff8cf253a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4747:
#0: ffff888027fbb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.3/5108:
3 locks held by syz-executor.5/9052:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x187/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xec2/0xf00 kernel/hung_task.c:379
kthread+0x270/0x300 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: 4411 Comm: syslogd Not tainted 6.3.0-rc6-syzkaller-00016-g0d3eb744aed4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
RIP: 0010:on_stack arch/x86/include/asm/stacktrace.h:56 [inline]
RIP: 0010:stack_access_ok arch/x86/kernel/unwind_orc.c:366 [inline]
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:376 [inline]
RIP: 0010:unwind_next_frame+0xc1e/0x2180 arch/x86/kernel/unwind_orc.c:560
Code: 4c 89 7c 24 28 49 8d 5c 24 08 48 89 d8 48 c1 e8 03 48 89 44 24 58 42 80 3c 30 00 74 08 48 89 df e8 07 72 a3 00 4d 8b 74 24 08 <49> 8d 6c 24 10 49 89 ef 49 c1 ef 03 48 b8 00 00 00 00 00 fc ff df
RSP: 0018:ffffc9000310f350 EFLAGS: 00000246
RAX: 1ffff92000621e91 RBX: ffffc9000310f488 RCX: ffffffff8e620738
RDX: ffffffff8ecd66f6 RSI: 0000000000000000 RDI: ffffffff813cac27
RBP: ffffffff8ecd6751 R08: 0000000000000010 R09: ffffc9000310f480
R10: 0000000000000000 R11: dffffc0000000001 R12: ffffc9000310f480
R13: ffffffff8ecd6750 R14: ffffc90003108000 R15: ffffffff8ecd6754
FS: 00007fec56457800(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020001000 CR3: 000000002c18d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__unwind_start+0x5a1/0x720 arch/x86/kernel/unwind_orc.c:735
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0xdf/0x140 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x117/0x1c0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4f/0x70 mm/kasan/common.c:52
kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:521
____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook mm/slub.c:1807 [inline]
slab_free mm/slub.c:3787 [inline]
__kmem_cache_free+0x264/0x3c0 mm/slub.c:3800
skb_kfree_head net/core/skbuff.c:858 [inline]
skb_free_head net/core/skbuff.c:870 [inline]
skb_release_data+0x51d/0x810 net/core/skbuff.c:899
skb_release_all net/core/skbuff.c:964 [inline]
__kfree_skb net/core/skbuff.c:978 [inline]
consume_skb+0xb1/0x150 net/core/skbuff.c:1191
__unix_dgram_recvmsg+0xcb7/0x1260 net/unix/af_unix.c:2532
sock_recvmsg_nosec net/socket.c:1017 [inline]
sock_recvmsg net/socket.c:1038 [inline]
sock_read_iter+0x3a8/0x500 net/socket.c:1116
call_read_iter include/linux/fs.h:1845 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7e2/0xbe0 fs/read_write.c:470
ksys_read+0x1a0/0x2c0 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fec565e38fe
Code: c0 e9 e6 fe ff ff 50 48 8d 3d 0e c7 09 00 e8 c9 cf 01 00 66 0f 1f 84 00 00 00 00 00 64 8b 04 25 18 00 00 00 85 c0 75 14 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 48 83 ec 28
RSP: 002b:00007ffc1b934d98 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007fec565e38fe
RDX: 00000000000000ff RSI: 000055af7af72950 RDI: 0000000000000000
RBP: 000055af7af72910 R08: 00007fec56673040 R09: 00007fec566730c0
R10: 00007fec56672fc0 R11: 0000000000000246 R12: 000055af7af72997
R13: 000055af7af72950 R14: 0000000000000000 R15: 0000000000000000