INFO: task syz.3.3145:20003 blocked for more than 143 seconds.
Not tainted 6.13.0-rc6-syzkaller-00006-g5428dc1906dd #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.3145 state:D stack:26336 pid:20003 tgid:19999 ppid:19204 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__super_lock fs/super.c:58 [inline]
super_lock+0x31a/0x3f0 fs/super.c:120
super_lock_shared fs/super.c:139 [inline]
iterate_supers+0xb9/0x240 fs/super.c:931
drop_caches_sysctl_handler+0xeb/0x190 fs/drop_caches.c:64
proc_sys_call_handler+0x403/0x5d0 fs/proc/proc_sysctl.c:601
iter_file_splice_write+0x90f/0x10b0 fs/splice.c:743
do_splice_from fs/splice.c:941 [inline]
direct_splice_actor+0x18f/0x6c0 fs/splice.c:1164
splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
do_splice_direct_actor fs/splice.c:1207 [inline]
do_splice_direct+0x178/0x250 fs/splice.c:1233
do_sendfile+0xaed/0xe30 fs/read_write.c:1363
__do_sys_sendfile64 fs/read_write.c:1418 [inline]
__se_sys_sendfile64 fs/read_write.c:1410 [inline]
__x64_sys_sendfile64+0x155/0x220 fs/read_write.c:1410
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: 0033:0x7f28ccb85d29
RSP: 002b:00007f28cd8d2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f28ccd75fa0 RCX: 00007f28ccb85d29
RDX: 0000000020002080 RSI: 0000000000000003 RDI: 0000000000000004
RBP: 00007f28ccc01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f28ccd75fa0 R15: 00007fff2fbad998
Showing all locks held in the system:
2 locks held by rcu_exp_gp_kthr/19:
1 lock held by khungtaskd/30:
#0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bb900 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
3 locks held by kworker/u8:3/52:
4 locks held by kworker/u8:6/1118:
2 locks held by kworker/u8:7/2932:
#0: ffff88801cb8d948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000c407d80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
2 locks held by kworker/u8:8/2989:
#0: ffff88801b081148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000c547d80 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
2 locks held by kworker/u8:9/3020:
1 lock held by syslogd/5174:
1 lock held by udevd/5192:
2 locks held by getty/5573:
#0: ffff888031a630a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
1 lock held by syz-executor/5816:
#0: ffff88806051a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:56 [inline]
#0: ffff88806051a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff88806051a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: deactivate_super+0xd6/0x100 fs/super.c:505
2 locks held by kworker/u8:12/7989:
#0: ffff88801b081148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc9000464fd80 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
2 locks held by kworker/u8:13/9172:
2 locks held by kworker/u8:15/14313:
#0: ffff88801cb8d948 ((wq_completion)iou_exit){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3204
#1: ffffc900042dfd80 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205
3 locks held by kworker/0:1/16372:
2 locks held by syz.3.3145/20003:
#0: ffff888035204420 (sb_writers#3){.+.+}-{0:0}, at: splice_direct_to_actor+0x346/0xa40 fs/splice.c:1108
#1: ffff88806051a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: __super_lock fs/super.c:58 [inline]
#1: ffff88806051a0e0 (&type->s_umount_key#82){++++}-{4:4}, at: super_lock+0x31a/0x3f0 fs/super.c:120
3 locks held by kworker/u8:2/21492:
1 lock held by syz-executor/21716:
1 lock held by syz.7.3510/21739:
#0: ffff88806d99fcf8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1191
1 lock held by syz.7.3510/21743:
3 locks held by syz.7.3510/21746:
3 locks held by dhcpcd-run-hook/21754:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc6-syzkaller-00006-g5428dc1906dd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
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: 0 PID: 21716 Comm: syz-executor Not tainted 6.13.0-rc6-syzkaller-00006-g5428dc1906dd #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:unwind_next_frame+0x5e3/0x20c0 arch/x86/kernel/unwind_orc.c:517
Code: fc ff df 48 8b 14 24 48 c1 ea 03 80 3c 02 00 0f 85 a5 1a 00 00 48 89 c8 4d 8b 7d 38 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 <0f> b6 34 10 48 8d 41 01 48 89 c7 48 c1 ef 03 0f b6 14 17 48 89 cf
RSP: 0018:ffffc90010af78d0 EFLAGS: 00000a02
RAX: 1ffffffff220172a RBX: 0000000000000001 RCX: ffffffff9100b950
RDX: dffffc0000000000 RSI: 0000000000000001 RDI: ffffffff9079cd6c
RBP: ffffc90010af7988 R08: ffffffff9100b956 R09: ffffffff9100b954
R10: ffffc90010af7940 R11: 0000000000010641 R12: ffffc90010af7990
R13: ffffc90010af7940 R14: 0000000000000005 R15: ffffc90010af7b80
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000564b0a37bf10 CR3: 000000000df7e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:297
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1127 [inline]
free_unref_page+0x661/0x1080 mm/page_alloc.c:2659
vfree+0x174/0x950 mm/vmalloc.c:3383
kcov_put kernel/kcov.c:439 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:435
kcov_close+0xd/0x20 kernel/kcov.c:535
__fput+0x3f8/0xb60 fs/file_table.c:450
task_work_run+0x14e/0x250 kernel/task_work.c:239
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0xad8/0x2d70 kernel/exit.c:938
do_group_exit+0xd3/0x2a0 kernel/exit.c:1087
__do_sys_exit_group kernel/exit.c:1098 [inline]
__se_sys_exit_group kernel/exit.c:1096 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1096
x64_sys_call+0x151f/0x1720 arch/x86/include/generated/asm/syscalls_64.h:232
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: 0033:0x7fcd77585d29
Code: Unable to access opcode bytes at 0x7fcd77585cff.
RSP: 002b:00007ffd969336a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000043 RCX: 00007fcd77585d29
RDX: 00007fcd775847a0 RSI: 0000000000000004 RDI: 0000000000000043
RBP: 00007fcd77776738 R08: 00007ffd96931446 R09: 0000000000000008
R10: 000000000000001a R11: 0000000000000246 R12: 0000000000000008
R13: 0000000000000003 R14: 0000000000000009 R15: 0000000000000000