INFO: task syz.1.2495:18897 blocked for more than 143 seconds.
Not tainted 6.12.0-rc3-syzkaller-00013-geca631b8fe80 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.2495 state:D stack:27408 pid:18897 tgid:18890 ppid:18697 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0xef5/0x5750 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6774
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:418 [inline]
do_coredump+0x82f/0x4160 fs/coredump.c:575
get_signal+0x237c/0x26d0 kernel/signal.c:2902
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
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+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff25457dff9
RSP: 002b:00007ff253f9c0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007ff2547362e8 RCX: 00007ff25457dff9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007ff2547362ec
RBP: 00007ff2547362e0 R08: 00007ff255296080 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff2547362ec
R13: 0000000000000000 R14: 00007fff1add5ab0 R15: 00007fff1add5b98
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8ddb7800 (
rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
5 locks held by kworker/u8:10/3038:
#0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000a4cfd80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8faada50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xbb/0xb40 net/core/net_namespace.c:580
#3: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: cleanup_net+0x503/0xb40 net/core/net_namespace.c:616
#4: ffffffff8ddc30f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297
2 locks held by getty/4987:
#0: ffff8880321ea0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5221:
3 locks held by kworker/1:4/5276:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc900038afd80 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
3 locks held by kworker/u8:16/5704:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x1212/0x1b30 kernel/workqueue.c:3204
#1: ffffc9000998fd80 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
#2: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0x51/0xc0 net/core/link_watch.c:276
2 locks held by syz.1.355/6950:
1 lock held by syz.0.2136/16474:
2 locks held by syz-executor/16959:
1 lock held by syz.1.2495/18891:
1 lock held by syz-executor/18941:
2 locks held by syz.2.2951/21004:
1 lock held by syz-executor/21040:
#0: ffff8880b873ee98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x29/0x130 kernel/sched/core.c:593
2 locks held by syz.3.2961/21042:
#0: ffff888067e6a6c8 (nlk_cb_mutex-ROUTE){+.+.}-{3:3}, at: __netlink_dump_start+0x154/0x980 net/netlink/af_netlink.c:2405
#1: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#1: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_dumpit+0x18f/0x1f0 net/core/rtnetlink.c:6534
1 lock held by syz-executor/21056:
#0: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fac3668 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x372/0xea0 net/core/rtnetlink.c:6672
3 locks held by dhcpcd-run-hook/21059:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.12.0-rc3-syzkaller-00013-geca631b8fe80 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
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:223 [inline]
watchdog+0xf0c/0x1240 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: 19595 Comm: syz.3.2671 Not tainted 6.12.0-rc3-syzkaller-00013-geca631b8fe80 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:__lock_release kernel/locking/lockdep.c:5509 [inline]
RIP: 0010:lock_release+0x248/0x6f0 kernel/locking/lockdep.c:5846
Code: e6 4c 89 ff e8 59 08 ff ff 48 85 c0 48 89 c5 0f 84 a9 02 00 00 48 8d 78 24 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 2c
RSP: 0018:ffffc9000d397520 EFLAGS: 00000807
RAX: dffffc0000000000 RBX: 1ffff92001a72ea6 RCX: ffffc9000d397570
RDX: 1ffff11005c7f16f RSI: ffffffff8ddb7740 RDI: ffff88802e3f8b7c
RBP: ffff88802e3f8b58 R08: 0000000000000000 R09: fffffbfff2039b39
R10: ffffffff901cd9cf R11: 0000000000000000 R12: ffffffff8ddb7740
R13: 0000000000000004 R14: ffff88802e3f8ad8 R15: ffff88802e3f8000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa5540e5000 CR3: 0000000043226000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_lock_release include/linux/rcupdate.h:347 [inline]
rcu_read_unlock_sched include/linux/rcupdate.h:962 [inline]
pfn_valid include/linux/mmzone.h:2053 [inline]
page_table_check_clear mm/page_table_check.c:70 [inline]
__page_table_check_pte_clear+0x2d9/0x580 mm/page_table_check.c:169
page_table_check_pte_clear include/linux/page_table_check.h:49 [inline]
ptep_get_and_clear_full arch/x86/include/asm/pgtable.h:1337 [inline]
get_and_clear_full_ptes include/linux/pgtable.h:684 [inline]
zap_present_folio_ptes mm/memory.c:1496 [inline]
zap_present_ptes mm/memory.c:1579 [inline]
zap_pte_range mm/memory.c:1621 [inline]
zap_pmd_range mm/memory.c:1739 [inline]
zap_pud_range mm/memory.c:1768 [inline]
zap_p4d_range mm/memory.c:1789 [inline]
unmap_page_range+0x2284/0x3ce0 mm/memory.c:1810
unmap_single_vma+0x194/0x2b0 mm/memory.c:1856
unmap_vmas+0x22f/0x490 mm/memory.c:1900
exit_mmap+0x1c6/0xb30 mm/mmap.c:1864
__mmput+0x12a/0x480 kernel/fork.c:1347
mmput+0x62/0x70 kernel/fork.c:1369
exit_mm kernel/exit.c:571 [inline]
do_exit+0x9bf/0x2d70 kernel/exit.c:926
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
get_signal+0x2658/0x26d0 kernel/signal.c:2917
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
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+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc7d5f7dff9
Code: Unable to access opcode bytes at 0x7fc7d5f7dfcf.
RSP: 002b:00007fc7d6e320e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fc7d6135f88 RCX: 00007fc7d5f7dff9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc7d6135f88
RBP: 00007fc7d6135f80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc7d6135f8c
R13: 0000000000000000 R14: 00007ffc638a8780 R15: 00007ffc638a8868