INFO: task syz-executor:4168 blocked for more than 143 seconds.
Not tainted 5.15.178-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:20504 pid: 4168 ppid: 1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5027 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6373
schedule+0x11b/0x1f0 kernel/sched/core.c:6456
io_schedule+0x88/0x100 kernel/sched/core.c:8481
wait_on_page_bit_common+0xa13/0x1180 mm/filemap.c:1356
lock_page include/linux/pagemap.h:625 [inline]
truncate_inode_pages_range+0xc17/0x1290 mm/truncate.c:394
evict+0x53c/0x930 fs/inode.c:624
dispose_list fs/inode.c:655 [inline]
evict_inodes+0x668/0x700 fs/inode.c:709
generic_shutdown_super+0x94/0x310 fs/super.c:454
kill_block_super+0x7a/0xe0 fs/super.c:1427
deactivate_locked_super+0xa0/0x110 fs/super.c:335
cleanup_mnt+0x44e/0x500 fs/namespace.c:1143
task_work_run+0x129/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x5d/0x240 kernel/entry/common.c:307
do_syscall_64+0x47/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe453c4a117
RSP: 002b:00007fffee471458 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007fe453cca08c RCX: 00007fe453c4a117
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffee471510
RBP: 00007fffee471510 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fffee4725a0
R13: 00007fe453cca08c R14: 0000000000091c17 R15: 00007fffee4725e0
Showing all locks held in the system:
4 locks held by ksoftirqd/1/20:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1fce0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by udevd/3545:
#0: ffff888020f63518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
2 locks held by getty/3926:
#0: ffff88802c69e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002cd62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
1 lock held by syz-executor/4168:
#0: ffff88802334e0e0 (&type->s_umount_key#99){+.+.}-{3:3}, at: deactivate_super+0xa9/0xe0 fs/super.c:365
2 locks held by syz-executor/4169:
#0: ffff888020f61918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
#1: ffff8881473d7468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa9/0xbe0 drivers/block/loop.c:1365
2 locks held by kworker/0:8/5145:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002e3fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
3 locks held by kworker/0:13/5150:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc900031ffd20 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#2: ffffffff8cb242a8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
2 locks held by syz-executor/18184:
#0: ffff888020f66118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
#1: ffff8881473f8468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070
2 locks held by syz.5.7667/21468:
#0: ffff888020f63518 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
#1: ffff8881473e2468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 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:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 14 Comm: ksoftirqd/0 Not tainted 5.15.178-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
RIP: 0010:skb_network_protocol+0x1/0x770 net/core/dev.c:3325
Code: a5 7a 74 f9 e9 29 fe ff ff 44 89 e1 80 e1 07 38 c1 0f 8c 2f fe ff ff be 04 00 00 00 4c 89 e7 e8 85 7a 74 f9 e9 1d fe ff ff 55 <48> 89 e5 41 57 41 56 41 55 41 54 53 48 83 e4 e0 48 81 ec a0 00 00
RSP: 0018:ffffc90000d36340 EFLAGS: 00000246
RAX: 000061164fdd19e9 RBX: ffff8880673ee500 RCX: ffff88813ff21dc0
RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8880673ee500
RBP: ffff8880673ee500 R08: 0000000000000003 R09: ffffffff88560c33
R10: 0000000000000002 R11: ffff88813ff21dc0 R12: 000061164fdd19e9
R13: dffffc0000000000 R14: 000061164fdd19e9 R15: 000061164fdd19e9
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe3e3b1b5c CR3: 000000001f9ef000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
harmonize_features net/core/dev.c:3506 [inline]
netif_skb_features+0x72b/0xbb0 net/core/dev.c:3601
validate_xmit_skb+0x84/0xe90 net/core/dev.c:3690
__dev_queue_xmit+0x146b/0x32b0 net/core/dev.c:4247
br_dev_queue_push_xmit+0x6e1/0x8a0 net/bridge/br_forward.c:53
NF_HOOK+0x697/0x760 include/linux/netfilter.h:302
br_nf_post_routing+0x8f1/0xc80 net/bridge/br_netfilter_hooks.c:958
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x27c/0x420 include/linux/netfilter.h:300
br_forward_finish+0x74/0x80 net/bridge/br_forward.c:66
br_nf_forward_finish+0xa5b/0xe20 net/bridge/br_netfilter_hooks.c:665
NF_HOOK+0x697/0x760 include/linux/netfilter.h:302
br_nf_forward_ip+0xbe2/0x1010 net/bridge/br_netfilter_hooks.c:735
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_slow+0xae/0x1e0 net/netfilter/core.c:584
nf_hook include/linux/netfilter.h:257 [inline]
NF_HOOK+0x27c/0x420 include/linux/netfilter.h:300
__br_forward+0x430/0x5f0 net/bridge/br_forward.c:115
br_handle_frame_finish+0x11d6/0x15f0 net/bridge/br_input.c:180
br_nf_hook_thresh+0x46a/0x580 net/bridge/br_netfilter_hooks.c:1158
br_nf_pre_routing_finish_ipv6+0xa08/0xcd0
NF_HOOK include/linux/netfilter.h:302 [inline]
br_nf_pre_routing_ipv6+0x35d/0x720 net/bridge/br_netfilter_ipv6.c:237
nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:242 [inline]
br_handle_frame+0x8a8/0x10e0 net/bridge/br_input.c:384
__netif_receive_skb_core+0x13b9/0x3df0 net/core/dev.c:5387
__netif_receive_skb_one_core net/core/dev.c:5491 [inline]
__netif_receive_skb+0x11c/0x530 net/core/dev.c:5607
process_backlog+0x363/0x7f0 net/core/dev.c:6484
__napi_poll+0xc7/0x440 net/core/dev.c:7043
napi_poll net/core/dev.c:7110 [inline]
net_rx_action+0x617/0xda0 net/core/dev.c:7200
handle_softirqs+0x3a7/0x930 kernel/softirq.c:558
run_ksoftirqd+0xc6/0x120 kernel/softirq.c:925
smpboot_thread_fn+0x51b/0x9d0 kernel/smpboot.c:164
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287