INFO: task syz.6.899:9151 blocked for more than 143 seconds.
Not tainted 6.13.0-syzkaller-00603-g3d3a9c8b89d4 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.6.899 state:D stack:28496 pid:9151 tgid:9148 ppid:8729 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5369 [inline]
__schedule+0xe58/0x5ad0 kernel/sched/core.c:6756
__schedule_loop kernel/sched/core.c:6833 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6848
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6905
__mutex_lock_common kernel/locking/mutex.c:665 [inline]
__mutex_lock+0x62b/0xa60 kernel/locking/mutex.c:735
fdget_pos+0x267/0x390 fs/file.c:1192
class_fd_pos_constructor include/linux/file.h:85 [inline]
ksys_read+0x72/0x250 fs/read_write.c:699
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: 0033:0x7fd954d85d29
RSP: 002b:00007fd955bd3038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 00007fd954f76080 RCX: 00007fd954d85d29
RDX: 0000000000002020 RSI: 0000000020001940 RDI: 0000000000000007
RBP: 00007fd954e01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd954f76080 R15: 00007ffc36b3b1d8
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e1bbcc0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e1bbcc0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e1bbcc0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
3 locks held by kworker/1:1/46:
#0: ffff88801b078948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc90000b67d80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
#2: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
3 locks held by kworker/u8:8/3622:
#0: ffff88814cfce948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc9000d3e7d80 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
#2: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: addrconf_dad_work+0xcf/0x14d0 net/ipv6/addrconf.c:4215
4 locks held by udevd/5190:
#0: ffff88806ade4d58 (&p->lock){+.+.}-{4:4}, at: seq_read_iter+0xd8/0x12b0 fs/seq_file.c:182
#1: ffff88802c4d9488 (&of->mutex#2){+.+.}-{4:4}, at: kernfs_seq_start+0x4d/0x240 fs/kernfs/file.c:154
#2: ffff888052bd10f8 (kn->active#5){++++}-{0:0}, at: kernfs_seq_start+0x71/0x240 fs/kernfs/file.c:155
#3: ffff88802aba50e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#3: ffff88802aba50e8 (&dev->mutex){....}-{4:4}, at: uevent_show+0x188/0x3b0 drivers/base/core.c:2729
2 locks held by dhcpcd/5484:
#0: ffff88802ff076c8 (nlk_cb_mutex-ROUTE){+.+.}-{4:4}, at: netlink_dump+0x9e8/0xd00 net/netlink/af_netlink.c:2263
#1: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_dumpit+0x18f/0x1f0 net/core/rtnetlink.c:6790
2 locks held by getty/5579:
#0: ffff8880325ac0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900032fb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
5 locks held by kworker/u8:11/6357:
#0: ffff88801beeb148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc9000c1f7d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
#2: ffffffff8fedba50 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xbd0 net/core/net_namespace.c:602
#3: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: cleanup_net+0x503/0xbd0 net/core/net_namespace.c:638
#4: ffffffff8e1c75f8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
2 locks held by kworker/u8:12/6458:
#0: ffff88801b081148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1293/0x1ba0 kernel/workqueue.c:3211
#1: ffffc9000c697d80 ((work_completion)(&rreq->work)#2){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3212
3 locks held by syz.6.899/9149:
#0: ffff88802ac387f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
#1: ffff8880510ec420 (sb_writers#23){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
#2: ffff888061358e28 (&sb->s_type->i_mutex_key#31){++++}-{4:4}, at: netfs_start_io_direct+0x116/0x260 fs/netfs/locking.c:188
1 lock held by syz.6.899/9151:
#0: ffff88802ac387f8 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x267/0x390 fs/file.c:1192
1 lock held by syz-executor/11880:
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6928
1 lock held by syz-executor/11896:
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6928
1 lock held by syz-executor/11941:
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_net_lock include/linux/rtnetlink.h:128 [inline]
#0: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: inet_rtm_newaddr+0x316/0x1560 net/ipv4/devinet.c:987
7 locks held by syz-executor/11967:
#0: ffff888031e1c420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
#1: ffff8880579d4088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
#2: ffff8880286b8b48 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
#3: ffffffff8f49a2c8 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: new_device_store+0x187/0x730 drivers/net/netdevsim/bus.c:166
#4: ffff88802aba50e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
#4: ffff88802aba50e8 (&dev->mutex){....}-{4:4}, at: __device_attach+0x7f/0x4b0 drivers/base/dd.c:1005
#5: ffff88802aba0250 (&devlink->lock_key#60){+.+.}-{4:4}, at: nsim_drv_probe+0xd5/0x1490 drivers/net/netdevsim/dev.c:1537
#6: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: register_nexthop_notifier+0x1b/0x70 net/ipv4/nexthop.c:3878
2 locks held by syz-executor/11985:
#0: ffffffff8f28c140 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:158 [inline]
#0: ffffffff8f28c140 (&ops->srcu#2){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:249 [inline]
#0: ffffffff8f28c140 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x10f/0x2c0 net/core/rtnetlink.c:559
#1: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:326 [inline]
#1: ffffffff8fef1648 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x5d9/0x1d60 net/core/rtnetlink.c:4011
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-syzkaller-00603-g3d3a9c8b89d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
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:234 [inline]
watchdog+0xf14/0x1240 kernel/hung_task.c:397
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: 11 Comm: kworker/u8:0 Not tainted 6.13.0-syzkaller-00603-g3d3a9c8b89d4 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:switch_mm_irqs_off+0x20/0xb10 arch/x86/mm/tlb.c:503
Code: 90 90 90 90 90 90 90 90 90 90 66 0f 1f 00 41 57 41 56 49 89 d6 41 55 41 54 55 53 48 89 f3 48 83 ec 30 65 4c 8b 25 30 de b8 7e <65> 66 8b 2d 38 de b8 7e 66 89 2c 24 65 44 8a 3d dc de b8 7e e8 b7
RSP: 0018:ffffc90000107918 EFLAGS: 00000086
RAX: 0000000000000000 RBX: ffffffff8e359940 RCX: ffffffff813e26aa
RDX: ffff88801c2fa440 RSI: ffffffff8e359940 RDI: 0000000000000000
RBP: ffffffff81f26676 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000006 R12: ffff88801b070000
R13: 0000000000000007 R14: ffff88801c2fa440 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005643de72f728 CR3: 000000001b06a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unuse_temporary_mm arch/x86/kernel/alternative.c:1860 [inline]
__text_poke+0x543/0xca0 arch/x86/kernel/alternative.c:1970
text_poke_bp_batch+0x493/0x760 arch/x86/kernel/alternative.c:2402
text_poke_flush arch/x86/kernel/alternative.c:2515 [inline]
text_poke_flush arch/x86/kernel/alternative.c:2512 [inline]
text_poke_finish+0x30/0x40 arch/x86/kernel/alternative.c:2522
arch_jump_label_transform_apply+0x1c/0x30 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1d7/0x400 kernel/jump_label.c:920
static_key_disable_cpuslocked+0x158/0x1c0 kernel/jump_label.c:240
static_key_disable+0x1a/0x20 kernel/jump_label.c:248
toggle_allocation_gate mm/kfence/core.c:854 [inline]
toggle_allocation_gate+0x147/0x260 mm/kfence/core.c:841
process_one_work+0x9c5/0x1ba0 kernel/workqueue.c:3236
process_scheduled_works kernel/workqueue.c:3317 [inline]
worker_thread+0x6c8/0xf00 kernel/workqueue.c:3398
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