INFO: task syz.4.1311:17201 blocked for more than 143 seconds.
Not tainted 6.11.0-rc1-syzkaller-00272-g17712b7ea075 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.1311 state:D stack:28832 pid:17201 tgid:17194 ppid:16897 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0xe37/0x5490 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6621
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2557
___down_common kernel/locking/semaphore.c:225 [inline]
__down_common+0x32d/0x730 kernel/locking/semaphore.c:246
down+0x74/0xa0 kernel/locking/semaphore.c:63
console_lock+0x5b/0xa0 kernel/printk/printk.c:2735
vcs_open+0x64/0xc0 drivers/tty/vt/vc_screen.c:763
chrdev_open+0x26d/0x6f0 fs/char_dev.c:414
do_dentry_open+0x91f/0x15f0 fs/open.c:959
vfs_open+0x82/0x3f0 fs/open.c:1089
do_open fs/namei.c:3727 [inline]
path_openat+0x2141/0x2d20 fs/namei.c:3886
do_filp_open+0x1dc/0x430 fs/namei.c:3913
do_sys_openat2+0x17a/0x1e0 fs/open.c:1416
do_sys_open fs/open.c:1431 [inline]
__do_sys_openat fs/open.c:1447 [inline]
__se_sys_openat fs/open.c:1442 [inline]
__x64_sys_openat+0x175/0x210 fs/open.c:1442
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: 0033:0x7ff9ac7779f9
RSP: 002b:00007ff9ad553048 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ff9ac906058 RCX: 00007ff9ac7779f9
RDX: 0000000000000100 RSI: 0000000020000080 RDI: ffffffffffffff9c
RBP: 00007ff9ac7e58ee R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007ff9ac906058 R15: 00007ffc5105fdb8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8ddb53a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6620
2 locks held by udevd/4671:
2 locks held by getty/4979:
#0: ffff88802b1260a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:3/5271:
#0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc9000383fd80 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffff8880a5e20240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x1bb/0x26e0 drivers/net/netdevsim/fib.c:1489
3 locks held by kworker/u8:19/5563:
#0: ffff88802a16c148 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc900034cfd80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xcf/0x1500 net/ipv6/addrconf.c:4194
3 locks held by kworker/u8:21/5566:
3 locks held by kworker/u8:0/7981:
4 locks held by kworker/0:1/13902:
#0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1277/0x1b40 kernel/workqueue.c:3206
#1: ffffc90004de7d80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x921/0x1b40 kernel/workqueue.c:3207
#2: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
#3: ffffffff8ddc0b38 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:296
6 locks held by syz.1.1334/16843:
2 locks held by syz-executor/17602:
#0: ffffffff8fabd2f0 (cb_lock){++++}-{3:3}, at: genl_rcv+0x19/0x40 net/netlink/genetlink.c:1218
#1: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: nl80211_pre_doit+0xb4/0xb10 net/wireless/nl80211.c:16547
1 lock held by syz-executor/17622:
#0: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644
7 locks held by syz-executor/17744:
#0: ffff88802fb8a420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1: ffff8880b2f51088 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff8880234efc38 (kn->active#51){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3: ffffffff8efb84e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: new_device_store+0x187/0x730 drivers/net/netdevsim/bus.c:166
#4: ffff888051c270e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff888051c270e8 (&dev->mutex){....}-{3:3}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1004
#5: ffff888093a0e250 (&devlink->lock_key#137){+.+.}-{3:3}, at: nsim_drv_probe+0xd5/0x1490 drivers/net/netdevsim/dev.c:1534
#6: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: fib_seq_sum+0x30/0x2f0 net/core/fib_notifier.c:46
1 lock held by syz-executor/17748:
#0: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fa1fca8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6644
4 locks held by syz-executor/17751:
#0: ffff88802fb8a420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12f/0x260 fs/read_write.c:643
#1: ffff88806cba5888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x281/0x500 fs/kernfs/file.c:325
#2: ffff8880234efd28 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x2a4/0x500 fs/kernfs/file.c:326
#3: ffffffff8efb84e8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by udevd/17753:
#0: ffff8880a4cb5c30 (&p->lock){+.+.}-{3:3}, at: seq_read_iter+0xde/0x12c0 fs/seq_file.c:182
#1: ffff888098f58c88 (&of->mutex#2){+.+.}-{3:3}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff8880ac34f5a8 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff888051c270e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#3: ffff888051c270e8 (&dev->mutex){....}-{3:3}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2743
2 locks held by dhcpcd-run-hook/17824:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00272-g17712b7ea075 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:93 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:119
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:223 [inline]
watchdog+0xf4e/0x1280 kernel/hung_task.c:379
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: 5210 Comm: syz-executor Not tainted 6.11.0-rc1-syzkaller-00272-g17712b7ea075 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:mark_usage kernel/locking/lockdep.c:4576 [inline]
RIP: 0010:__lock_acquire+0x870/0x3cb0 kernel/locking/lockdep.c:5096
Code: e8 75 75 7f 00 45 8b 87 c4 0a 00 00 45 85 c0 0f 85 0a 0c 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 0f b6 04 02 <48> 89 da 83 e2 07 38 d0 7f 08 84 c0 0f 85 fb 32 00 00 41 0f b6 45
RSP: 0018:ffffc900032df618 EFLAGS: 00000802
RAX: 0000000000000000 RBX: ffff88802a81472a RCX: 0000000000000000
RDX: 1ffff110055028e5 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 0000000000000002 R08: 0000000000000000 R09: fffffbfff28c56f0
R10: ffffffff9462b787 R11: 0000000000000000 R12: dffffc0000000000
R13: ffff88802a814708 R14: 0000000000000004 R15: ffff88802a813c00
FS: 00005555770de500(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200b6000 CR3: 000000002a1d4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire kernel/locking/lockdep.c:5759 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5724
local_lock_acquire include/linux/local_lock_internal.h:29 [inline]
napi_skb_cache_put+0x12f/0x7a0 net/core/skbuff.c:1453
__napi_kfree_skb net/core/skbuff.c:1471 [inline]
kfree_skb_napi_cache net/core/skbuff.c:7029 [inline]
skb_attempt_defer_free+0x1bd/0x620 net/core/skbuff.c:7051
tcp_eat_recv_skb net/ipv4/tcp.c:1523 [inline]
tcp_recvmsg_locked+0x11cd/0x2700 net/ipv4/tcp.c:2547
tcp_recvmsg+0x12e/0x680 net/ipv4/tcp.c:2593
inet_recvmsg+0x12b/0x6a0 net/ipv4/af_inet.c:885
sock_recvmsg_nosec net/socket.c:1046 [inline]
sock_recvmsg+0x1b2/0x250 net/socket.c:1068
sock_read_iter+0x2c7/0x3c0 net/socket.c:1138
new_sync_read fs/read_write.c:395 [inline]
vfs_read+0xa39/0xbd0 fs/read_write.c:476
ksys_read+0x1f8/0x260 fs/read_write.c:619
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: 0033:0x7fbdf9b763fd
Code: a8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb b5 e8 78 47 00 00 0f 1f 84 00 00 00 00 00 80 3d 41 11 16 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec
RSP: 002b:00007ffcd5c4e308 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fbdf9b763fd
RDX: 0000000000000034 RSI: 0000555577100470 RDI: 0000000000000003
RBP: 0000000000000000 R08: 000000000007312a R09: 00007fbdfa94b080
R10: 0000000000000001 R11: 0000000000000246 R12: 00007ffcd5c4e710
R13: 0000000000000034 R14: 0000555577100470 R15: 00007ffcd5c4e3b0