INFO: task syz.7.446:9807 blocked for more than 143 seconds.
Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.7.446 state:D stack:27216 pid:9807 tgid:9751 ppid:9454 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
xfs_ail_push_all_sync+0x236/0x310 fs/xfs/xfs_trans_ail.c:726
xfs_log_quiesce+0xdf/0x5b0 fs/xfs/xfs_log.c:1018
xfs_log_clean+0xa4/0xc40 fs/xfs/xfs_log.c:1030
xfs_remount_ro fs/xfs/xfs_super.c:1922 [inline]
xfs_fs_reconfigure+0x7b1/0x930 fs/xfs/xfs_super.c:1978
reconfigure_super+0x445/0x880 fs/super.c:1083
do_remount fs/namespace.c:3047 [inline]
path_mount+0xc22/0xfa0 fs/namespace.c:3826
do_mount fs/namespace.c:3847 [inline]
__do_sys_mount fs/namespace.c:4057 [inline]
__se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4034
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f47f0b7feba
RSP: 002b:00007f47f194de68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f47f194def0 RCX: 00007f47f0b7feba
RDX: 0000000020000f40 RSI: 0000000020000f00 RDI: 0000000000000000
RBP: 0000000020000f40 R08: 00007f47f194def0 R09: 0000000001a4a421
R10: 0000000001a4a421 R11: 0000000000000246 R12: 0000000020000f00
R13: 00007f47f194deb0 R14: 0000000000000000 R15: 00000000200008c0
INFO: task syz.1.460:9928 blocked for more than 143 seconds.
Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.460 state:D stack:22392 pid:9928 tgid:9927 ppid:9019 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x17fa/0x4bd0 kernel/sched/core.c:6690
__schedule_loop kernel/sched/core.c:6767 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6782
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839
rwsem_down_read_slowpath kernel/locking/rwsem.c:1084 [inline]
__down_read_common kernel/locking/rwsem.c:1248 [inline]
__down_read kernel/locking/rwsem.c:1261 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1526
__super_lock fs/super.c:58 [inline]
super_lock+0x27c/0x400 fs/super.c:120
super_lock_shared fs/super.c:139 [inline]
iterate_supers+0x8c/0x190 fs/super.c:931
ksys_sync+0xbd/0x1c0 fs/sync.c:102
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa84557e719
RSP: 002b:00007fa8463cb038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fa845735f80 RCX: 00007fa84557e719
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fa8455f139e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fa845735f80 R15: 00007ffc29e1db18
Showing all locks held in the system:
3 locks held by kworker/0:1/9:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc900000e7d00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900000e7d00 (deferred_process_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcc13c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xe/0x20 net/switchdev/switchdev.c:104
1 lock held by khungtaskd/30:
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
3 locks held by kworker/u8:5/1101:
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac89148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc90003c47d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc90003c47d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8fcc13c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xe/0x60 net/core/link_watch.c:276
5 locks held by kworker/u8:7/1136:
4 locks held by kworker/u8:8/1150:
4 locks held by udevd/5204:
2 locks held by getty/5591:
#0: ffff888031c3d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by kworker/0:4/5880:
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3204 [inline]
#0: ffff88801ac80948 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x93b/0x1850 kernel/workqueue.c:3310
#1: ffffc900041bfd00 (free_ipc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3205 [inline]
#1: ffffc900041bfd00 (free_ipc_work){+.+.}-{0:0}, at: process_scheduled_works+0x976/0x1850 kernel/workqueue.c:3310
#2: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#2: ffffffff8e93d338 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x451/0x830 kernel/rcu/tree_exp.h:976
3 locks held by udevd/6136:
1 lock held by syz-executor/9391:
1 lock held by syz.7.446/9807:
#0: ffff8880570f40e0 (&type->s_umount_key#76){++++}-{3:3}, at: do_remount fs/namespace.c:3044 [inline]
#0: ffff8880570f40e0 (&type->s_umount_key#76){++++}-{3:3}, at: path_mount+0xbdb/0xfa0 fs/namespace.c:3826
1 lock held by syz.1.460/9928:
#0: ffff8880570f40e0 (&type->s_umount_key#76){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff8880570f40e0 (&type->s_umount_key#76){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
2 locks held by syz-executor/12130:
1 lock held by syz-executor/12861:
#0: ffffffff8fcc13c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:79 [inline]
#0: ffffffff8fcc13c8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x6e6/0xcf0 net/core/rtnetlink.c:6672
4 locks held by syz.5.756/12970:
2 locks held by syz.9.758/12980:
1 lock held by cmp/12999:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #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+0x241/0x360 lib/dump_stack.c:120
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+0xff4/0x1040 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 35 Comm: kworker/u8:2 Not tainted 6.12.0-rc6-syzkaller-00110-gff7afaeca1a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound nsim_dev_trap_report_work
RIP: 0010:trace_kmalloc+0x18/0xd0 include/trace/events/kmem.h:54
Code: 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66 90 65 8b 05 83 5d 14 7e 83 f8 08 73 23 89 c0 48 0f a3 05 50 62 2c 0e <73> 12 e8 31 4d 8b ff 84 c0 75 09 f6 05 44 26 16 0e 01 74 0b c3 cc
RSP: 0018:ffffc90000ab7960 EFLAGS: 00000293
RAX: 0000000000000000 RBX: ffff888067642000 RCX: 0000000000002000
RDX: 0000000000001000 RSI: ffff888067642000 RDI: ffffffff8982f0c3
RBP: ffff888067642000 R08: 0000000000082820 R09: 00000000ffffffff
R10: ffffc90000ab75d0 R11: ffffffff81809260 R12: ffff88801ac42140
R13: 0000000000082820 R14: 00000000ffffffff R15: 0000000000001000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0d25d75000 CR3: 0000000033a6a000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__kmalloc_node_track_caller_noprof+0x242/0x440 mm/slub.c:4283
kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:609
__alloc_skb+0x1f3/0x440 net/core/skbuff.c:678
alloc_skb include/linux/skbuff.h:1322 [inline]
nsim_dev_trap_skb_build drivers/net/netdevsim/dev.c:748 [inline]
nsim_dev_trap_report drivers/net/netdevsim/dev.c:805 [inline]
nsim_dev_trap_report_work+0x254/0xab0 drivers/net/netdevsim/dev.c:851
process_one_work kernel/workqueue.c:3229 [inline]
process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
worker_thread+0x870/0xd30 kernel/workqueue.c:3391
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