INFO: task syz-executor.4:21046 blocked for more than 143 seconds.
Not tainted 5.15.152-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:23552 pid:21046 ppid: 12458 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518
rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047
__down_read_common kernel/locking/rwsem.c:1231 [inline]
__down_read kernel/locking/rwsem.c:1244 [inline]
down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490
iterate_supers+0xac/0x1e0 fs/super.c:703
drop_caches_sysctl_handler+0x83/0x160 fs/drop_caches.c:62
proc_sys_call_handler+0x541/0x8a0 fs/proc/proc_sysctl.c:587
do_iter_readv_writev+0x594/0x7a0
do_iter_write+0x1ea/0x760 fs/read_write.c:855
iter_file_splice_write+0x806/0xfa0 fs/splice.c:689
do_splice_from fs/splice.c:767 [inline]
direct_splice_actor+0xe3/0x1c0 fs/splice.c:936
splice_direct_to_actor+0x500/0xc10 fs/splice.c:891
do_splice_direct+0x285/0x3d0 fs/splice.c:979
do_sendfile+0x625/0xff0 fs/read_write.c:1249
__do_sys_sendfile64 fs/read_write.c:1311 [inline]
__se_sys_sendfile64+0xfc/0x1e0 fs/read_write.c:1303
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+0x61/0xcb
RIP: 0033:0x7f8164398da9
RSP: 002b:00007f81629190c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007f81644c6f80 RCX: 00007f8164398da9
RDX: 0000000020002080 RSI: 0000000000000007 RDI: 0000000000000008
RBP: 00007f81643e547a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f81644c6f80 R15: 00007ffeac529948
Showing all locks held in the system:
3 locks held by kworker/0:0/7:
#0: ffff888011c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90000cc7d20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffff88816191c240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x2cd/0x4120 drivers/net/netdevsim/fib.c:1478
1 lock held by khungtaskd/26:
#0: ffffffff8c91f720 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by udevd/2963:
2 locks held by getty/3256:
#0: ffff88814afe2098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1:
ffffc9000209b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
3 locks held by kworker/u4:5/3632:
3 locks held by kworker/u4:16/13941:
3 locks held by kworker/u4:17/13942:
5 locks held by syz-executor.0/20285:
2 locks held by syz-executor.4/21046:
#0: ffff88807f15e460 (sb_writers#4){.+.+}-{0:0}, at: do_sendfile+0x600/0xff0 fs/read_write.c:1248
#1: ffff888020be60e0 (&type->s_umount_key#74){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703
1 lock held by syz-executor.1/23617:
#0: ffffffff8c923ce8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#0: ffffffff8c923ce8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
1 lock held by syz-executor.3/24159:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3508 Comm: syz-fuzzer Not tainted 5.15.152-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024
RIP: 0010:lookup_chain_cache kernel/locking/lockdep.c:3681 [inline]
RIP: 0010:lookup_chain_cache_add kernel/locking/lockdep.c:3701 [inline]
RIP: 0010:validate_chain+0x16c/0x5930 kernel/locking/lockdep.c:3756
Code: b8 eb 83 b5 80 46 86 c8 61 49 0f af c6 48 c1 e8 2f 48 8d 1c c5 40 f0 a8 8f 48 89 d8 48 c1 e8 03 48 89 44 24 50 42 80 3c 20 00 <74> 08 48 89 df e8 ea b0 66 00 48 89 5c 24 20 48 8b 1b 48 85 db 74
RSP: 0018:ffffc90002526820 EFLAGS: 00000046
RAX: 1ffffffff1f6c27c RBX: ffffffff8fb613e0 RCX: ffffffff816344f2
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8fbcf0c8
RBP: ffffc90002526ad0 R08: dffffc0000000000 R09: fffffbfff1f79e1a
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff888020130c28 R14: 0eddaddf7c5e449c R15: ffff888020130c28
FS: 000000c00092e490(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6730f40000 CR3: 0000000024b0d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
seqcount_lockdep_reader_access+0x13b/0x220 include/linux/seqlock.h:103
ktime_get_with_offset+0x8c/0x320 kernel/time/timekeeping.c:872
ktime_get_real include/linux/timekeeping.h:79 [inline]
__net_timestamp include/linux/skbuff.h:3929 [inline]
net_timestamp_set net/core/dev.c:2164 [inline]
dev_queue_xmit_nit+0x845/0xae0 net/core/dev.c:2314
xmit_one net/core/dev.c:3612 [inline]
dev_hard_start_xmit+0x137/0x7a0 net/core/dev.c:3633
sch_direct_xmit+0x2b2/0x5e0 net/sched/sch_generic.c:342
__dev_xmit_skb net/core/dev.c:3844 [inline]
__dev_queue_xmit+0x18ee/0x3230 net/core/dev.c:4213
neigh_hh_output include/net/neighbour.h:493 [inline]
neigh_output include/net/neighbour.h:507 [inline]
ip_finish_output2+0xcd7/0x11a0 net/ipv4/ip_output.c:228
dst_output include/net/dst.h:443 [inline]
ip_local_out net/ipv4/ip_output.c:126 [inline]
__ip_queue_xmit+0x1296/0x1ce0 net/ipv4/ip_output.c:532
__tcp_transmit_skb+0x1f39/0x3810 net/ipv4/tcp_output.c:1402
tcp_ack_snd_check net/ipv4/tcp_input.c:5565 [inline]
tcp_rcv_established+0xf01/0x1e20 net/ipv4/tcp_input.c:5990
tcp_v4_do_rcv+0x423/0x960 net/ipv4/tcp_ipv4.c:1727
sk_backlog_rcv include/net/sock.h:1059 [inline]
__release_sock+0x198/0x4b0 net/core/sock.c:2713
release_sock+0x5d/0x1c0 net/core/sock.c:3254
tcp_recvmsg+0x25d/0x7f0 net/ipv4/tcp.c:2564
inet_recvmsg+0x157/0x280 net/ipv4/af_inet.c:859
sock_recvmsg_nosec net/socket.c:966 [inline]
sock_recvmsg net/socket.c:984 [inline]
sock_read_iter+0x353/0x480 net/socket.c:1057
call_read_iter include/linux/fs.h:2142 [inline]
new_sync_read fs/read_write.c:404 [inline]
vfs_read+0xa9f/0xe10 fs/read_write.c:485
ksys_read+0x1a2/0x2c0 fs/read_write.c:623
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+0x61/0xcb
RIP: 0033:0x40720e
Code: 48 83 ec 38 e8 13 00 00 00 48 83 c4 38 5d c3 cc cc cc cc cc cc cc cc cc cc cc cc cc 49 89 f2 48 89 fa 48 89 ce 48 89 df 0f 05 <48> 3d 01 f0 ff ff 76 15 48 f7 d8 48 89 c1 48 c7 c0 ff ff ff ff 48
RSP: 002b:000000c0007b18d8 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 000000000040720e
RDX: 0000000000001000 RSI: 000000c00097c000 RDI: 0000000000000003
RBP: 000000c0007b1918 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000000c00093be10
R13: 0000000000000002 R14: 000000c0009129c0 R15: 0000000000000003