INFO: task syz-executor.5:8390 blocked for more than 143 seconds.
Not tainted 6.1.0-rc5-syzkaller-00008-ge01d50cbd6ee #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:23560 pid:8390 ppid:3564 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5191 [inline]
__schedule+0x8c9/0xd70 kernel/sched/core.c:6503
schedule+0xcb/0x190 kernel/sched/core.c:6579
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1034/0x1870 fs/fuse/dev.c:511
fuse_getxattr+0x3b7/0x660 fs/fuse/xattr.c:82
fuse_xattr_get+0x7a/0x90 fs/fuse/xattr.c:188
__vfs_getxattr+0x3de/0x410 fs/xattr.c:407
cap_inode_need_killpriv+0x41/0x60 security/commoncap.c:301
security_inode_need_killpriv+0x50/0xb0 security/security.c:1422
notify_change+0x4e1/0x10f0 fs/attr.c:353
chown_common+0x586/0x8f0 fs/open.c:736
do_fchownat+0x165/0x240 fs/open.c:767
__do_sys_chown fs/open.c:787 [inline]
__se_sys_chown fs/open.c:785 [inline]
__x64_sys_chown+0x7e/0x90 fs/open.c:785
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fb54ea8b639
RSP: 002b:00007fb54f7ca168 EFLAGS: 00000246 ORIG_RAX: 000000000000005c
RAX: ffffffffffffffda RBX: 00007fb54ebabf80 RCX: 00007fb54ea8b639
RDX: 000000000000ee00 RSI: 0000000000000000 RDI: 0000000020000100
RBP: 00007fb54eae6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc369dc6bf R14: 00007fb54f7ca300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8d327330 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8d327b30 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/28:
#0: ffffffff8d327160 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3313:
#0: ffff88814b349098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc900031262f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177
1 lock held by syz-executor.4/3571:
#0: ffffffff8d32c738 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#0: ffffffff8d32c738 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x384/0x860 kernel/rcu/tree_exp.h:946
2 locks held by kworker/u4:6/3712:
2 locks held by syz-executor.5/8390:
#0: ffff8880783f2460 (sb_writers#26){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:393
#1: ffff88806fd59c50 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff88806fd59c50 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: chown_common+0x414/0x8f0 fs/open.c:729
5 locks held by syz-executor.5/8515:
2 locks held by kworker/u4:8/9602:
#0: ffff888012869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc90017367d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
3 locks held by kworker/u4:9/12668:
#0: ffff888012869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0
#1: ffffc90017567d00 ((work_completion)(&ctx->exit_work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264
#2: ffff8880221130a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_try_cancel_requests+0x3b9/0x481 io_uring/io_uring.c:2939
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.1.0-rc5-syzkaller-00008-ge01d50cbd6ee #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+0x1b1/0x28e lib/dump_stack.c:106
nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1ba/0x420 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+0xcf5/0xd40 kernel/hung_task.c:377
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4753 Comm: kworker/0:13 Not tainted 6.1.0-rc5-syzkaller-00008-ge01d50cbd6ee #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Workqueue: events nsim_dev_trap_report_work
RIP: 0010:memset+0x3/0x40 mm/kasan/shadow.c:43
Code: cc cc cc cc cc cc cc 89 f6 48 8b 0c 24 31 d2 e9 e3 ec ff ff 0f 1f 00 89 f6 48 8b 0c 24 ba 01 00 00 00 e9 d0 ec ff ff 55 41 56 <53> 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18 48 89 d6 ba 01 00 00
RSP: 0018:ffffc900153d7608 EFLAGS: 00000246
RAX: ffffc900153d7a00 RBX: ffffc900153d7738 RCX: dffffc0000000000
RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc900153d7750
RBP: 1ffffffff1e5377e R08: 000000000000000d R09: dffffc0000000000
R10: fffff52002a7aeec R11: 1ffff92002a7aeea R12: ffffc900153d7700
R13: ffffffff8f29bbf4 R14: ffffc900153d7750 R15: 1ffff92002a7aee1
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fbe88e4e950 CR3: 0000000026e65000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xdbc/0x24c0 arch/x86/kernel/unwind_orc.c:546
arch_stack_walk+0xb2/0xe0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
____kasan_kmalloc mm/kasan/common.c:371 [inline]
__kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slab_common.c:955 [inline]
__kmalloc_node_track_caller+0xad/0x190 mm/slab_common.c:975
kmalloc_reserve net/core/skbuff.c:437 [inline]
__alloc_skb+0x112/0x2b0 net/core/skbuff.c:509
alloc_skb include/linux/skbuff.h:1267 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:751 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:808 [inline]
nsim_dev_trap_report_work+0x268/0xaa0 drivers/net/netdevsim/dev.c:853
process_one_work+0x877/0xdb0 kernel/workqueue.c:2289
worker_thread+0xb14/0x1330 kernel/workqueue.c:2436
kthread+0x266/0x300 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306