Message-ID: <677bba5e.050a0220.a40f5.000d.GAE@google.com>
Date: Mon, 06 Jan 2025 03:11:26 -0800
From: syzbot <syzbot+3147c5de186107ffc7a1@...kaller.appspotmail.com>
To: anna-maria@...utronix.de, frederic@...nel.org, 
	linux-kernel@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	tglx@...utronix.de
Subject: [syzbot] [kernel?] INFO: task hung in remove_one

Hello,

syzbot found the following issue on:

HEAD commit:    56e6a3499e14 Merge tag 'trace-v6.13-rc5' of git://git.kern..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13ba7818580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=86dd15278dbfe19f
dashboard link: https://syzkaller.appspot.com/bug?extid=3147c5de186107ffc7a1
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11a4e6c4580000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/565d8b4108b2/disk-56e6a349.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e85ad690a360/vmlinux-56e6a349.xz
kernel image: https://storage.googleapis.com/syzbot-assets/e6c6b9944a99/bzImage-56e6a349.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3147c5de186107ffc7a1@...kaller.appspotmail.com

INFO: task kworker/u8:1:12 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u8:1    state:D stack:26048 pid:12    tgid:12    ppid:2      flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
 <TASK>
 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_timeout+0x244/0x280 kernel/time/sleep_timeout.c:75
 do_wait_for_common kernel/sched/completion.c:95 [inline]
 __wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
 __debugfs_file_removed fs/debugfs/inode.c:782 [inline]
 remove_one+0x30f/0x420 fs/debugfs/inode.c:789
 simple_recursive_removal+0x4e2/0x8e0 fs/libfs.c:643
 debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:812
 nsim_dev_health_exit+0x3b/0xe0 drivers/net/netdevsim/health.c:227
 nsim_dev_reload_destroy+0x143/0x4d0 drivers/net/netdevsim/dev.c:1664
 nsim_dev_reload_down+0x6e/0xd0 drivers/net/netdevsim/dev.c:968
 devlink_reload+0x17f/0x760 net/devlink/dev.c:461
 devlink_pernet_pre_exit+0x1a1/0x2b0 net/devlink/core.c:509
 ops_pre_exit_list net/core/net_namespace.c:162 [inline]
 cleanup_net+0x488/0xbd0 net/core/net_namespace.c:628
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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
 </TASK>
INFO: task syz-executor:8392 blocked for more than 143 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:23728 pid:8392  tgid:8392  ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 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
 device_lock include/linux/device.h:1014 [inline]
 device_del+0xa1/0x9f0 drivers/base/core.c:3816
 device_unregister+0x1d/0xc0 drivers/base/core.c:3895
 nsim_bus_dev_del drivers/net/netdevsim/bus.c:462 [inline]
 del_device_store+0x346/0x4b0 drivers/net/netdevsim/bus.c:226
 bus_attr_store+0x71/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x12b/0x250 fs/read_write.c:731
 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: 0033:0x7fad171847df
RSP: 002b:00007ffcd19c5200 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fad171847df
RDX: 0000000000000001 RSI: 00007ffcd19c5250 RDI: 0000000000000005
RBP: 00007fad17202d15 R08: 0000000000000000 R09: 00007ffcd19c5057
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcd19c5250 R14: 00007fad17ea4620 R15: 0000000000000003
 </TASK>
INFO: task syz.2.2390:8408 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.2390      state:D stack:27424 pid:8408  tgid:8408  ppid:5954   flags:0x00000004
Call Trace:
 <TASK>
 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
 devlink_health_report+0x3c5/0x9d0 net/devlink/health.c:627
 nsim_dev_health_break_write+0x167/0x210 drivers/net/netdevsim/health.c:162
 full_proxy_write+0xfb/0x1b0 fs/debugfs/file.c:356
 vfs_write+0x24c/0x1150 fs/read_write.c:677
 ksys_write+0x12b/0x250 fs/read_write.c:731
 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: 0033:0x7f3379985d29
RSP: 002b:00007fffb3cb91a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3379b75fa0 RCX: 00007f3379985d29
RDX: 0000000000000081 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f3379a01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3379b75fa0 R14: 00007f3379b75fa0 R15: 00000000000018c7
 </TASK>
INFO: task syz.3.2419:8442 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.2419      state:D stack:27664 pid:8442  tgid:8442  ppid:5958   flags:0x00000004
Call Trace:
 <TASK>
 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
 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1084
 __down_read_common kernel/locking/rwsem.c:1248 [inline]
 __down_read kernel/locking/rwsem.c:1261 [inline]
 down_read+0x124/0x330 kernel/locking/rwsem.c:1526
 inode_lock_shared include/linux/fs.h:828 [inline]
 open_last_lookups fs/namei.c:3747 [inline]
 path_openat+0x88a/0x2d60 fs/namei.c:3984
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 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: 0033:0x7fb33b385d29
RSP: 002b:00007ffd334d3db8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb33b575fa0 RCX: 00007fb33b385d29
RDX: 0000000000000101 RSI: 00000000200000c0 RDI: ffffffffffffff9c
RBP: 00007fb33b401b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb33b575fa0 R14: 00007fb33b575fa0 R15: 0000000000000d70
 </TASK>
INFO: task syz.0.2421:8444 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.2421      state:D stack:27472 pid:8444  tgid:8444  ppid:5946   flags:0x00004004
Call Trace:
 <TASK>
 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
 rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1084
 __down_read_common kernel/locking/rwsem.c:1248 [inline]
 __down_read kernel/locking/rwsem.c:1261 [inline]
 down_read+0x124/0x330 kernel/locking/rwsem.c:1526
 inode_lock_shared include/linux/fs.h:828 [inline]
 open_last_lookups fs/namei.c:3747 [inline]
 path_openat+0x88a/0x2d60 fs/namei.c:3984
 do_filp_open+0x20c/0x470 fs/namei.c:4014
 do_sys_openat2+0x17a/0x1e0 fs/open.c:1402
 do_sys_open fs/open.c:1417 [inline]
 __do_sys_openat fs/open.c:1433 [inline]
 __se_sys_openat fs/open.c:1428 [inline]
 __x64_sys_openat+0x175/0x210 fs/open.c:1428
 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: 0033:0x7fc470585d29
RSP: 002b:00007ffed31fd638 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc470775fa0 RCX: 00007fc470585d29
RDX: 0000000000000101 RSI: 00000000200000c0 RDI: ffffffffffffff9c
RBP: 00007fc470601b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc470775fa0 R14: 00007fc470775fa0 R15: 0000000000000d70
 </TASK>
INFO: task syz-executor:8458 blocked for more than 144 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:24176 pid:8458  tgid:8458  ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 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
 del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
 bus_attr_store+0x71/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x12b/0x250 fs/read_write.c:731
 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: 0033:0x7fed3a5847df
RSP: 002b:00007fffb95726c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007fed3a5847df
RDX: 0000000000000001 RSI: 00007fffb9572710 RDI: 0000000000000005
RBP: 00007fed3a602d15 R08: 0000000000000000 R09: 00007fffb9572517
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007fffb9572710 R14: 00007fed3b2a4620 R15: 0000000000000003
 </TASK>
INFO: task syz-executor:8460 blocked for more than 145 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:24368 pid:8460  tgid:8460  ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 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
 del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
 bus_attr_store+0x71/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x12b/0x250 fs/read_write.c:731
 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: 0033:0x7f1a33f847df
RSP: 002b:00007ffcc5f907c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f1a33f847df
RDX: 0000000000000001 RSI: 00007ffcc5f90810 RDI: 0000000000000005
RBP: 00007f1a34002d15 R08: 0000000000000000 R09: 00007ffcc5f90617
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcc5f90810 R14: 00007f1a34ca4620 R15: 0000000000000003
 </TASK>
INFO: task syz-executor:8461 blocked for more than 145 seconds.
      Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:24592 pid:8461  tgid:8461  ppid:1      flags:0x00000004
Call Trace:
 <TASK>
 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
 del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
 bus_attr_store+0x71/0xb0 drivers/base/bus.c:172
 sysfs_kf_write+0x117/0x170 fs/sysfs/file.c:139
 kernfs_fop_write_iter+0x33d/0x500 fs/kernfs/file.c:334
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0x5ae/0x1150 fs/read_write.c:679
 ksys_write+0x12b/0x250 fs/read_write.c:731
 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: 0033:0x7f38d41847df
RSP: 002b:00007ffcd430b8c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00007f38d41847df
RDX: 0000000000000001 RSI: 00007ffcd430b910 RDI: 0000000000000005
RBP: 00007f38d4202d15 R08: 0000000000000000 R09: 00007ffcd430b717
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000001
R13: 00007ffcd430b910 R14: 00007f38d4ea4620 R15: 0000000000000003
 </TASK>

Showing all locks held in the system:
6 locks held by kworker/u8:1/12:
 #0: ffff88801baed948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x12cd/0x1b30 kernel/workqueue.c:3204
 #1: ffffc90000117d80 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8bb/0x1b30 kernel/workqueue.c:3205
 #2: ffffffff8faa9cd0 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0xbb/0xbd0 net/core/net_namespace.c:602
 #3: ffff88805cd320e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
 #3: ffff88805cd320e8 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:108 [inline]
 #3: ffff88805cd320e8 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x12d/0x2b0 net/devlink/core.c:506
 #4: ffff88805cd33250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:276 [inline]
 #4: ffff88805cd33250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:109 [inline]
 #4: ffff88805cd33250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x137/0x2b0 net/devlink/core.c:506
 #5: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock include/linux/fs.h:818 [inline]
 #5: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: simple_recursive_removal+0x2f5/0x8e0 fs/libfs.c:635
1 lock held by khungtaskd/30:
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8ddbad40 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6744
2 locks held by kworker/u8:7/3562:
2 locks held by getty/5605:
 #0: ffff88814e8c00a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
 #1: ffffc90002fde2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
5 locks held by syz-executor/8392:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff8880640ad488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
 #4: ffff88805cd320e8 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1014 [inline]
 #4: ffff88805cd320e8 (&dev->mutex){....}-{4:4}, at: device_del+0xa1/0x9f0 drivers/base/core.c:3816
2 locks held by syz.2.2390/8408:
 #0: ffff88801d69e420 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff88805cd33250 (&devlink->lock_key#4){+.+.}-{4:4}, at: devlink_health_report+0x3c5/0x9d0 net/devlink/health.c:627
2 locks held by syz.3.2419/8442:
 #0: ffff88801d69e420 (sb_writers#9){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3737 [inline]
 #0: ffff88801d69e420 (sb_writers#9){.+.+}-{0:0}, at: path_openat+0x1f46/0x2d60 fs/namei.c:3984
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: path_openat+0x88a/0x2d60 fs/namei.c:3984
2 locks held by syz.0.2421/8444:
 #0: ffff88801d69e420 (sb_writers#9){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3737 [inline]
 #0: ffff88801d69e420 (sb_writers#9){.+.+}-{0:0}, at: path_openat+0x1f46/0x2d60 fs/namei.c:3984
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: inode_lock_shared include/linux/fs.h:828 [inline]
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: open_last_lookups fs/namei.c:3747 [inline]
 #1: ffff88805f01ee90 (&sb->s_type->i_mutex_key#3){++++}-{4:4}, at: path_openat+0x88a/0x2d60 fs/namei.c:3984
4 locks held by syz-executor/8458:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff88814046f888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8460:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff8881453fe088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8461:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888032b13488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8488:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888063babc88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8501:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888032042488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8504:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888073f7d888 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8507:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888031696c88 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8533:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888030fbf488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8546:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888060cc3088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8548:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff888058971088 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216
4 locks held by syz-executor/8552:
 #0: ffff888034fe0420 (sb_writers#8){.+.+}-{0:0}, at: ksys_write+0x12b/0x250 fs/read_write.c:731
 #1: ffff88805e6a4488 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x27b/0x500 fs/kernfs/file.c:325
 #2: ffff888027b1ae18 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x29e/0x500 fs/kernfs/file.c:326
 #3: ffffffff8f074688 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd2/0x4b0 drivers/net/netdevsim/bus.c:216

=============================================

NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __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
 </TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 52 Comm: kworker/u8:3 Not tainted 6.13.0-rc5-syzkaller-00006-g56e6a3499e14 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:unwind_next_frame+0xb5c/0x20c0 arch/x86/kernel/unwind_orc.c:592
Code: c1 ea 03 80 3c 02 00 0f 85 6c 12 00 00 49 8d 7d 58 49 c7 45 50 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 a4 12 00 00 4c 89 c8 49 c7 45 58 00 00 00 00 48
RSP: 0018:ffffc90000bd6be8 EFLAGS: 00000a06
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: ffffffff9154b0c0
RDX: 1ffff9200017ad96 RSI: 1ffff9200017ad94 RDI: ffffc90000bd6cb0
RBP: ffffc90000bd6ca0 R08: ffffc90000bd6c8c R09: ffffffff9154b0c4
R10: ffffc90000bd6c58 R11: 00000000000993a4 R12: ffffc90000bd6ca8
R13: ffffc90000bd6c58 R14: ffffc90000bd7c88 R15: ffffc90000bd7c80
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056240f7bb600 CR3: 000000000db7e000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <NMI>
 </NMI>
 <TASK>
 arch_stack_walk+0x95/0x100 arch/x86/kernel/stacktrace.c:25
 stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4298 [inline]
 __kmalloc_noprof+0x21a/0x4f0 mm/slub.c:4310
 kmalloc_noprof include/linux/slab.h:905 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 ieee802_11_parse_elems_full+0xe6/0x1630 net/mac80211/parse.c:958
 ieee802_11_parse_elems_crc net/mac80211/ieee80211_i.h:2384 [inline]
 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2391 [inline]
 ieee80211_inform_bss+0xf1/0x10f0 net/mac80211/scan.c:79
 rdev_inform_bss net/wireless/rdev-ops.h:418 [inline]
 cfg80211_inform_single_bss_data+0x8b1/0x1e40 net/wireless/scan.c:2334
 cfg80211_inform_bss_data+0x254/0x3e40 net/wireless/scan.c:3189
 cfg80211_inform_bss_frame_data+0x252/0x8a0 net/wireless/scan.c:3284
 ieee80211_bss_info_update+0x311/0xab0 net/mac80211/scan.c:226
 ieee80211_rx_bss_info net/mac80211/ibss.c:1101 [inline]
 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1580 [inline]
 ieee80211_ibss_rx_queued_mgmt+0x1956/0x3040 net/mac80211/ibss.c:1607
 ieee80211_iface_process_skb net/mac80211/iface.c:1613 [inline]
 ieee80211_iface_work+0xc0b/0xf00 net/mac80211/iface.c:1667
 cfg80211_wiphy_work+0x3de/0x560 net/wireless/core.c:440
 process_one_work+0x958/0x1b30 kernel/workqueue.c:3229
 process_scheduled_works kernel/workqueue.c:3310 [inline]
 worker_thread+0x6c8/0xf00 kernel/workqueue.c:3391
 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
 </TASK>


---
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