INFO: task syz.2.253:6182 blocked for more than 143 seconds.
Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.253 state:D stack:25824 pid:6182 tgid:6182 ppid:5232 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
request_wait_answer+0x4f8/0x900 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x511/0xd20 fs/fuse/dev.c:513
fuse_flush+0x4f3/0x6d0 fs/fuse/file.c:542
filp_flush+0xbd/0x1a0 fs/open.c:1526
filp_close+0x1c/0x30 fs/open.c:1539
__range_close fs/file.c:718 [inline]
__close_range+0x3e5/0x9b0 fs/file.c:787
__do_sys_close_range fs/open.c:1592 [inline]
__se_sys_close_range fs/open.c:1589 [inline]
__x64_sys_close_range+0x72/0xb0 fs/open.c:1589
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89a0379e79
RSP: 002b:00007fff49862248 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: ffffffffffffffda RBX: 00007f89a0517a80 RCX: 00007f89a0379e79
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f89a0517a80 R08: 0000000000000006 R09: 00007fff4986252f
R10: 00000000003ffc14 R11: 0000000000000246 R12: 000000000002f052
R13: 00007fff49862340 R14: 00007fff49862360 R15: ffffffffffffffff
INFO: task syz.2.253:6196 blocked for more than 145 seconds.
Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.253 state:D stack:29328 pid:6196 tgid:6182 ppid:5232 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6678
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
__fdget_pos+0xeb/0x180 fs/file.c:1187
fdget_pos include/linux/file.h:76 [inline]
ksys_read+0x72/0x260 fs/read_write.c:610
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f89a0379e79
RSP: 002b:00007f89a014d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007f89a0516208 RCX: 00007f89a0379e79
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006
RBP: 00007f89a03e7916 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f89a0516208 R15: 00007fff498620e8
Showing all locks held in the system:
2 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb5ba0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb5ba0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb5ba0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6626
2 locks held by getty/4979:
#0: ffff88802336d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5212:
2 locks held by syz.2.253/6195:
#0: ffff888022b44848 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1187
#1: ffff88805cf38420 (sb_writers#14){.+.+}-{0:0}, at: do_writev+0x137/0x370 fs/read_write.c:1018
1 lock held by syz.2.253/6196:
#0: ffff888022b44848 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xeb/0x180 fs/file.c:1187
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 101 PID: 5023 Comm: dhcpcd Not tainted 6.11.0-rc3-syzkaller-00306-gdf6cbc62cc9b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:__sanitizer_cov_trace_pc+0x0/0x70 kernel/kcov.c:209
Code: be b0 01 00 00 e8 a0 ff ff ff 31 c0 c3 cc cc cc cc 66 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1e fa 65 48 8b 15 d4 62 79 7e 65 8b 05 d5 62 79 7e a9 00 01
RSP: 0018:ffffc9000311f730 EFLAGS: 00000082
RAX: 0000000000000000 RBX: ffffc9000311f800 RCX: 0000000000000001
RDX: 0000000000000008 RSI: ffffc9000311fc00 RDI: ffffc9000311f800
RBP: ffffc9000311fc00 R08: 0000000000000001 R09: 0000000000000004
R10: 0000000000000001 R11: 0000000000000000 R12: ffffc9000311f808
R13: ffffc9000311fc10 R14: 0000000000000001 R15: 0000000000000001
FS: 00007f12f854f740(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f89a05162e8 CR3: 000000007cfc0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
stack_access_ok+0x22/0x270 arch/x86/kernel/unwind_orc.c:390
deref_stack_reg arch/x86/kernel/unwind_orc.c:403 [inline]
unwind_next_frame+0x1b94/0x23a0 arch/x86/kernel/unwind_orc.c:648
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579
poison_slab_object+0xf7/0x160 mm/kasan/common.c:240
__kasan_slab_free+0x32/0x50 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2252 [inline]
slab_free mm/slub.c:4473 [inline]
kmem_cache_free+0x12f/0x3a0 mm/slub.c:4548
__sigqueue_free kernel/signal.c:451 [inline]
__sigqueue_free kernel/signal.c:443 [inline]
collect_signal+0x315/0x630 kernel/signal.c:594
__dequeue_signal kernel/signal.c:616 [inline]
dequeue_signal+0x35f/0x660 kernel/signal.c:639
get_signal+0x5fb/0x2770 kernel/signal.c:2796
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f12f861cad5
Code: 85 d2 74 0d 0f 10 02 48 8d 54 24 20 0f 11 44 24 20 64 8b 04 25 18 00 00 00 85 c0 75 27 41 b8 08 00 00 00 b8 0f 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 75 48 8b 15 24 73 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fff322b3d10 EFLAGS: 00000246 ORIG_RAX: 000000000000010f
RAX: fffffffffffffdfe RBX: 0000558542e1de20 RCX: 00007f12f861cad5
RDX: 0000000000000000 RSI: 0000000000000002 RDI: 0000558542e33080
RBP: 00007fff322b4060 R08: 0000000000000008 R09: 0000000000000000
R10: 00007fff322b4060 R11: 0000000000000246 R12: 0000000000000000
R13: 000055852393c610 R14: 00000000ffffffff R15: 0000000000000000