INFO: task syz.3.1832:15403 blocked for more than 143 seconds.
Not tainted 6.11.0-rc1-syzkaller-00233-g948752d2e010 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.1832 state:D stack:24880 pid:15403 tgid:15402 ppid:15042 flags:0x00024006
Call Trace:
context_switch kernel/sched/core.c:5188 [inline]
__schedule+0x1800/0x4a60 kernel/sched/core.c:6529
__schedule_loop kernel/sched/core.c:6606 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6621
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2557
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
io_wq_exit_workers io_uring/io-wq.c:1248 [inline]
io_wq_put_and_exit+0x344/0x720 io_uring/io-wq.c:1276
io_uring_clean_tctx+0x168/0x1e0 io_uring/tctx.c:193
io_uring_cancel_generic+0x76a/0x820 io_uring/io_uring.c:3085
io_uring_files_cancel include/linux/io_uring.h:20 [inline]
do_exit+0x6a8/0x27f0 kernel/exit.c:838
do_group_exit+0x207/0x2c0 kernel/exit.c:1031
get_signal+0x16a1/0x1740 kernel/signal.c:2917
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1cf29775fb
RSP: 002b:00007f1cf374bf20 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007f1cf29775fb
RDX: 00007f1cf374cff0 RSI: 0000000080085502 RDI: 0000000000000007
RBP: 00007f1cf374cff0 R08: 0000000000000080 R09: 00007f1cf374bfe8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000012 R15: 00007f1cf29eef29
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8e9377e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:326 [inline]
#0: ffffffff8e9377e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:838 [inline]
#0: ffffffff8e9377e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6620
5 locks held by kworker/u8:4/63:
#0: ffff8880166e5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff8880166e5948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc900015e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc900015e7d00 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fc738d0 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x16a/0xcc0 net/core/net_namespace.c:594
#3: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0xe9/0xa90 net/core/dev.c:11875
#4: ffffffff8e93cbb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#4: ffffffff8e93cbb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
3 locks held by kworker/u8:10/2584:
#0: ffff88802a2ec948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff88802a2ec948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc90009cf7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc90009cf7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xd0/0x16f0 net/ipv6/addrconf.c:4194
1 lock held by dhcpcd/4897:
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x2ce/0x1bc0 net/ipv4/devinet.c:1101
2 locks held by getty/4985:
#0: ffff88802b2ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031332f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ac/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/1:7/5296:
#0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3206 [inline]
#0: ffff888015880948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x90a/0x1830 kernel/workqueue.c:3312
#1: ffffc900038afd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3207 [inline]
#1: ffffc900038afd00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x945/0x1830 kernel/workqueue.c:3312
#2: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
1 lock held by iou-wrk-15403/15404:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15406:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15407:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15408:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15409:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15410:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15411:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by iou-wrk-15403/15412:
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_ring_submit_lock io_uring/io_uring.h:244 [inline]
#0: ffff888049ac80a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_provide_buffers+0xd06/0x1010 io_uring/kbuf.c:568
1 lock held by syz-executor/17642:
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
7 locks held by syz-executor/17697:
#0: ffff888029d96420 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2876 [inline]
#0: ffff888029d96420 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x227/0xc90 fs/read_write.c:586
#1: ffff88803f5e9888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1eb/0x500 fs/kernfs/file.c:325
#2: ffff88801ef07788 (kn->active#50){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x20f/0x500 fs/kernfs/file.c:326
#3: ffffffff8f51d268 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xfc/0x480 drivers/net/netdevsim/bus.c:216
#4: ffff888023e990e8 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:1009 [inline]
#4: ffff888023e990e8 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1094 [inline]
#4: ffff888023e990e8 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xce/0x7c0 drivers/base/dd.c:1292
#5: ffff888023e9a250 (&devlink->lock_key#78){+.+.}-{3:3}, at: nsim_drv_remove+0x50/0x160 drivers/net/netdevsim/dev.c:1672
#6: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: nsim_destroy+0x71/0x5c0 drivers/net/netdevsim/netdev.c:773
1 lock held by syz-executor/17740:
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
1 lock held by syz-executor/17837:
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fc80448 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6644
1 lock held by syz.1.2255/17869:
#0: ffffffff8e93cbb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:328 [inline]
#0: ffffffff8e93cbb8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:958
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.11.0-rc1-syzkaller-00233-g948752d2e010 #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+0x241/0x360 lib/dump_stack.c:119
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 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+0xfee/0x1030 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/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: 15404 Comm: iou-wrk-15403 Not tainted 6.11.0-rc1-syzkaller-00233-g948752d2e010 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x50b/0x2a00 arch/x86/kernel/unwind_orc.c:494
Code: 49 8d 5c 45 00 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 75 34 48 63 2b 48 01 dd 48 89 ef 4c 89 f6 70 5c 52 00 48 8d 43 04 4c 39 f5 4c 0f 46 e8 48 8d 43 fc 4c 0f
RSP: 0018:ffffc900045471c8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffffffff90274d0c RCX: dffffc0000000000
RDX: 0000000000000000 RSI: ffffffff8135b0fa RDI: ffffffff8135b0e6
RBP: ffffffff8135b0e6 R08: ffffffff81410c60 R09: ffffc90004547390
R10: 0000000000000003 R11: ffffffff817f0ca0 R12: ffffffff90274d14
R13: ffffffff90274d08 R14: ffffffff8135b0fa R15: ffffffff90274d04
FS: 00007f1cf374e6c0(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002009b000 CR3: 000000002acba000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:312 [inline]
__kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3988 [inline]
kmem_cache_alloc_bulk_noprof+0x4cd/0x770 mm/slub.c:4839
io_refill_buffer_cache io_uring/kbuf.c:516 [inline]
io_add_buffers io_uring/kbuf.c:544 [inline]
io_provide_buffers+0x58f/0x1010 io_uring/kbuf.c:594
io_issue_sqe+0x36a/0x1570 io_uring/io_uring.c:1710
io_wq_submit_work+0x7c3/0xbe0 io_uring/io_uring.c:1819
io_worker_handle_work+0x85a/0x11c0 io_uring/io-wq.c:600
io_wq_worker+0x4bc/0xed0 io_uring/io-wq.c:654
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244