INFO: task syz.6.1973:14313 blocked for more than 143 seconds.
Not tainted 6.16.0-rc6-syzkaller-00037-ge2291551827f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.1973 state:D stack:23768 pid:14313 tgid:14301 ppid:10393 task_flags:0x400040 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16f5/0x4d00 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0x724/0xe80 kernel/locking/mutex.c:747
blk_trace_setup+0xfb/0x1f0 kernel/trace/blktrace.c:631
sg_ioctl_common drivers/scsi/sg.c:1114 [inline]
sg_ioctl+0xaf3/0x2230 drivers/scsi/sg.c:1156
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2edb38e929
RSP: 002b:00007f2ed8d91038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2edb5b6240 RCX: 00007f2edb38e929
RDX: 0000200000000140 RSI: 00000000c0481273 RDI: 0000000000000005
RBP: 00007f2edb410ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f2edb5b6240 R15: 00007f2edb6dfa28
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5611:
#0: ffff888030ef50a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000333b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
5 locks held by kworker/u8:15/13346:
2 locks held by syz.5.1969/14290:
1 lock held by syz.6.1973/14313:
#0: ffff888142fcc3d0 (&q->debugfs_mutex){+.+.}-{4:4}, at: blk_trace_setup+0xfb/0x1f0 kernel/trace/blktrace.c:631
1 lock held by syz.3.2290/15541:
1 lock held by syz.7.2291/15543:
#0: ffffffff8e144ac0 (rcu_state.barrier_mutex){+.+.}-{4:4}, at: rcu_barrier+0x4c/0x570 kernel/rcu/tree.c:3786
1 lock held by syz.7.2291/15545:
1 lock held by dhcpcd/15549:
#0: ffff888057e8ac08 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:869 [inline]
#0: ffff888057e8ac08 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: __sock_release net/socket.c:646 [inline]
#0: ffff888057e8ac08 (&sb->s_type->i_mutex_key#11){+.+.}-{4:4}, at: sock_close+0x9b/0x240 net/socket.c:1391
2 locks held by dhcpcd/15551:
#0: ffff888196a2e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1667 [inline]
#0: ffff888196a2e258 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x32/0xcd0 net/packet/af_packet.c:3252
#1: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#1: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x3b9/0x730 kernel/rcu/tree_exp.h:998
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-syzkaller-00037-ge2291551827f #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14290 Comm: syz.5.1969 Not tainted 6.16.0-rc6-syzkaller-00037-ge2291551827f #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:__kernel_text_address+0xf/0x40 kernel/extable.c:79
Code: ed 94 00 eb b3 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 53 48 89 fb e8 43 00 00 00 85 c0 <0f> 95 c0 48 81 fb 00 a0 07 91 0f 93 c1 48 81 fb d0 4b 22 91 0f 92
RSP: 0018:ffffc9000c4b7058 EFLAGS: 00000202
RAX: 0000000000000001 RBX: ffffffff81c11bd9 RCX: 99827a40e4b52801
RDX: 0000000000000002 RSI: ffffffff8db83bd4 RDI: ffffffff81c11bd9
RBP: ffffc9000c4b7110 R08: ffffc9000c4b7a88 R09: 0000000000000000
R10: ffffc9000c4b70d8 R11: fffff52001896e1d R12: ffff88802f3f5a00
R13: 1ffff92001896e3c R14: dffffc0000000000 R15: 1ffff92001896e1a
FS: 00007f91b7dd66c0(0000) GS:ffff888125d23000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000404030 CR3: 000000002f376000 CR4: 00000000003526f0
DR0: 000000000000000e DR1: 000000000000000c DR2: 000000000000000e
DR3: 00000000000000b4 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
unwind_get_return_address+0x4d/0x90 arch/x86/kernel/unwind_orc.c:369
arch_stack_walk+0xfc/0x150 arch/x86/kernel/stacktrace.c:26
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
save_stack+0xf5/0x1f0 mm/page_owner.c:156
__set_page_owner+0x8d/0x4a0 mm/page_owner.c:329
set_page_owner include/linux/page_owner.h:32 [inline]
post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704
prep_new_page mm/page_alloc.c:1712 [inline]
get_page_from_freelist+0x21e4/0x22c0 mm/page_alloc.c:3669
__alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959
__alloc_pages_noprof mm/page_alloc.c:4993 [inline]
alloc_pages_bulk_noprof+0x560/0x710 mm/page_alloc.c:4913
___alloc_pages_bulk mm/kasan/shadow.c:344 [inline]
__kasan_populate_vmalloc mm/kasan/shadow.c:368 [inline]
kasan_populate_vmalloc+0xba/0x1a0 mm/kasan/shadow.c:417
alloc_vmap_area+0xd51/0x1490 mm/vmalloc.c:2092
__get_vm_area_node+0x1f8/0x300 mm/vmalloc.c:3187
get_vm_area_caller mm/vmalloc.c:3238 [inline]
vmap+0x162/0x310 mm/vmalloc.c:3510
relay_alloc_buf kernel/relay.c:126 [inline]
relay_create_buf kernel/relay.c:162 [inline]
relay_open_buf+0x3d9/0xd40 kernel/relay.c:383
relay_open+0x427/0x920 kernel/relay.c:512
do_blk_trace_setup+0x591/0x9d0 kernel/trace/blktrace.c:590
blk_trace_setup+0x116/0x1f0 kernel/trace/blktrace.c:632
sg_ioctl_common drivers/scsi/sg.c:1114 [inline]
sg_ioctl+0xaf3/0x2230 drivers/scsi/sg.c:1156
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:907 [inline]
__se_sys_ioctl+0xf9/0x170 fs/ioctl.c:893
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91b6f8e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f91b7dd6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f91b71b5fa0 RCX: 00007f91b6f8e929
RDX: 0000200000000140 RSI: 00000000c0481273 RDI: 0000000000000003
RBP: 00007f91b7010ca1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f91b71b5fa0 R15: 00007f91b72dfa28
vkms_vblank_simulate: vblank timer overrun