INFO: task syz-executor.2:4765 blocked for more than 143 seconds.
Not tainted 5.15.180-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27520 pid: 4765 ppid: 4486 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
vfs_fallocate+0x54a/0x6b0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb195d03959
RSP: 002b:00007fb1950850c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fb195e22f80 RCX: 00007fb195d03959
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007fb195d5fc88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb195e22f80 R15: 00007ffd1d2399b8
INFO: task syz-executor.1:4768 blocked for more than 143 seconds.
Not tainted 5.15.180-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26624 pid: 4768 ppid: 4494 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
vfs_fallocate+0x54a/0x6b0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f788d80a959
RSP: 002b:00007f788cb8c0c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f788d929f80 RCX: 00007f788d80a959
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007f788d866c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f788d929f80 R15: 00007ffd7dc14c78
INFO: task syz-executor.0:4780 blocked for more than 144 seconds.
Not tainted 5.15.180-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27520 pid: 4780 ppid: 4491 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
vfs_fallocate+0x54a/0x6b0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7ff3139d7959
RSP: 002b:00007ff312d590c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007ff313af6f80 RCX: 00007ff3139d7959
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007ff313a33c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff313af6f80 R15: 00007ffee04eae38
INFO: task syz-executor.3:4792 blocked for more than 144 seconds.
Not tainted 5.15.180-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26296 pid: 4792 ppid: 4496 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5030 [inline]
__schedule+0x12c4/0x45b0 kernel/sched/core.c:6376
schedule+0x11b/0x1f0 kernel/sched/core.c:6459
rwsem_down_write_slowpath+0xf0c/0x16a0 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
vfs_fallocate+0x54a/0x6b0 fs/open.c:308
ksys_fallocate fs/open.c:331 [inline]
__do_sys_fallocate fs/open.c:339 [inline]
__se_sys_fallocate fs/open.c:337 [inline]
__x64_sys_fallocate+0xb9/0x100 fs/open.c:337
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f1789e26959
RSP: 002b:00007f17891a80c8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f1789f45f80 RCX: 00007f1789e26959
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000003
RBP: 00007f1789e82c88 R08: 0000000000000000 R09: 0000000000000000
R10: 0000010000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f1789f45f80 R15: 00007fff47068f18
Showing all locks held in the system:
2 locks held by kworker/u4:0/9:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1f560 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
5 locks held by kworker/u4:2/154:
#0: ffff8880175cd938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002007d20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8dc38490 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0x166/0xc90 net/core/net_namespace.c:572
#3: ffffffff8dc44148 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock_unregistering net/core/dev.c:11619 [inline]
#3: ffffffff8dc44148 (rtnl_mutex){+.+.}-{3:3}, at: default_device_exit_batch+0x1ac/0x3f0 net/core/dev.c:11657
#4: ffffffff8cb23b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#4: ffffffff8cb23b28 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845
3 locks held by kworker/u4:3/155:
#0: ffff888017479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002017d20 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8dc44148 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
2 locks held by getty/3926:
#0: ffff88814cbb1098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900026362e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158
3 locks held by kworker/u4:4/4196:
2 locks held by kworker/0:6/4592:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc9000361fd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
3 locks held by kworker/1:7/4697:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283
#1: ffffc90002fbfd20 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285
#2: ffffffff8dc44148 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
1 lock held by syz-executor.4/4754:
1 lock held by syz-executor.2/4765:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.1/4768:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.0/4780:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.3/4792:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.5/5006:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.4/5023:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.2/5029:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.1/5039:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.0/5041:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.3/5043:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.5/5074:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.4/5116:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.2/5127:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.1/5148:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.3/5150:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
1 lock held by syz-executor.0/5152:
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff88801d999538 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x25e/0x4e0 block/fops.c:600
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:369
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 154 Comm: kworker/u4:2 Not tainted 5.15.180-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Workqueue: netns cleanup_net
RIP: 0010:memset+0x1f/0x40 mm/kasan/shadow.c:44
Code: 24 ba 01 00 00 00 e9 50 ef ff ff 55 41 56 53 48 89 d3 41 89 f6 48 89 fd 48 8b 4c 24 18 48 89 d6 ba 01 00 00 00 e8 31 ef ff ff <84> c0 74 12 48 89 ef 44 89 f6 48 89 da 5b 41 5e 5d e9 4b 30 72 02
RSP: 0018:ffffc90002007008 EFLAGS: 00000056
RAX: 0000000000000001 RBX: 0000000000000010 RCX: ffffffff8138c4b8
RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc90002007130
RBP: ffffc90002007130 R08: dffffc0000000000 R09: fffff52000400e28
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffffffff1de9553
R13: 1ffffffff1de9553 R14: 0000000000000000 R15: ffffc900020070e0
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcaebe8a48 CR3: 000000006c570000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0xbc8/0x1fa0 arch/x86/kernel/unwind_orc.c:547
arch_stack_walk+0x10d/0x140 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x113/0x1c0 kernel/stacktrace.c:122
kasan_save_stack+0x36/0x60 mm/kasan/common.c:38
kasan_record_aux_stack+0xba/0x100 mm/kasan/generic.c:348
__call_rcu kernel/rcu/tree.c:3007 [inline]
call_rcu+0x1c4/0xa70 kernel/rcu/tree.c:3087
radix_tree_node_free lib/radix-tree.c:308 [inline]
delete_node+0x1ac/0x770 lib/radix-tree.c:571
radix_tree_delete_item+0x2dc/0x3f0 lib/radix-tree.c:1428
kernfs_put+0x2f2/0x4a0 fs/kernfs/dir.c:545
kernfs_remove_by_name_ns+0x99/0x100 fs/kernfs/dir.c:1567
kernfs_remove_by_name include/linux/kernfs.h:598 [inline]
remove_files fs/sysfs/group.c:28 [inline]
sysfs_remove_group+0xfa/0x2a0 fs/sysfs/group.c:289
sysfs_remove_groups+0x50/0xa0 fs/sysfs/group.c:313
device_del+0x6da/0xbd0 drivers/base/core.c:3599
unregister_netdevice_many+0x1317/0x1840 net/core/dev.c:11160
default_device_exit_batch+0x390/0x3f0 net/core/dev.c:11666
ops_exit_list net/core/net_namespace.c:177 [inline]
cleanup_net+0x886/0xc90 net/core/net_namespace.c:618
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287