INFO: task syz.0.16:6668 blocked for more than 143 seconds.
Not tainted 6.16.0-syzkaller-00684-ge5cf61fa6e2f #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:25608 pid:6668 tgid:6666 ppid:6526 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5397 [inline]
__schedule+0x16aa/0x4c90 kernel/sched/core.c:6786
__schedule_loop kernel/sched/core.c:6864 [inline]
schedule+0x165/0x360 kernel/sched/core.c:6879
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6936
rwsem_down_write_slowpath+0xbec/0x1030 kernel/locking/rwsem.c:1176
__down_write_common kernel/locking/rwsem.c:1304 [inline]
__down_write kernel/locking/rwsem.c:1313 [inline]
down_write_nested+0x1b5/0x200 kernel/locking/rwsem.c:1694
inode_lock_nested include/linux/fs.h:914 [inline]
lock_two_directories+0x16b/0x220 fs/namei.c:3243
lock_rename fs/namei.c:3277 [inline]
do_renameat2+0x36f/0xa80 fs/namei.c:5224
__do_sys_renameat2 fs/namei.c:5312 [inline]
__se_sys_renameat2 fs/namei.c:5309 [inline]
__x64_sys_renameat2+0xce/0xe0 fs/namei.c:5309
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f94c7d8e929
RSP: 002b:00007f94c8bd4038 EFLAGS: 00000246 ORIG_RAX: 000000000000013c
RAX: ffffffffffffffda RBX: 00007f94c7fb5fa0 RCX: 00007f94c7d8e929
RDX: ffffffffffffff9c RSI: 0000200000000580 RDI: ffffffffffffff9c
RBP: 00007f94c7e10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000005c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f94c7fb5fa0 R15: 00007ffca6e44888
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8e13f0e0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770
2 locks held by getty/5603:
#0: ffff888035b7a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900036cb2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222
4 locks held by syz.0.16/6668:
#0: ffff88806d7c8428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88806d7c8738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88806d7c8738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888070d115f0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888070d115f0 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888070d115f0 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888070d115f0 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.1.17/6854:
#0: ffff88807e292428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88807e292738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88807e292738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888070d13c90 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888070d13c90 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888070d13c90 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888070d13c90 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.2.18/6877:
#0: ffff888078132428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888078132738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888078132738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888059cf9c60 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888059cf9c60 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888059cf9c60 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888059cf9c60 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.3.19/6906:
#0: ffff88805e1bc428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88805e1bc738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88805e1bc738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888059cfbc90 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888059cfbc90 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888059cfbc90 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888059cfbc90 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.4.20/6935:
#0: ffff88806d700428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff88806d700738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff88806d700738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888059cfe330 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888059cfe330 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888059cfe330 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888059cfe330 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.5.21/6963:
#0: ffff888141fa2428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888141fa2738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888141fa2738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888070e20f80 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888070e20f80 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888070e20f80 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888070e20f80 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.6.22/6991:
#0: ffff8880586da428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff8880586da738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff8880586da738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888070d17010 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888070d17010 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888070d17010 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888070d17010 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.7.23/7025:
#0: ffff888071962428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff888071962738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff888071962738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888059e29c60 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888059e29c60 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888059e29c60 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888059e29c60 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
4 locks held by syz.8.24/7055:
#0: ffff8880584f6428 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:557
#1: ffff8880584f6738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: lock_rename fs/namei.c:3276 [inline]
#1: ffff8880584f6738 (&type->s_vfs_rename_key){+.+.}-{4:4}, at: do_renameat2+0x364/0xa80 fs/namei.c:5224
#2: ffff888059e2c300 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#2: ffff888059e2c300 (&sb->s_type->i_mutex_key#20/1){+.+.}-{4:4}, at: lock_two_directories+0x141/0x220 fs/namei.c:3242
#3: ffff888059e2c300 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:914 [inline]
#3: ffff888059e2c300 (&sb->s_type->i_mutex_key#21/5){+.+.}-{4:4}, at: lock_two_directories+0x16b/0x220 fs/namei.c:3243
3 locks held by syz-executor/7058:
#0: ffffffff8ec932c0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8ec932c0 (&ops->srcu#2){.+.+}-{0:0}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8ec932c0 (&ops->srcu#2){.+.+}-{0:0}, at: rtnl_link_ops_get+0x23/0x250 net/core/rtnetlink.c:570
#1: ffffffff8f50bd88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock net/core/rtnetlink.c:80 [inline]
#1: ffffffff8f50bd88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_nets_lock net/core/rtnetlink.c:341 [inline]
#1: ffffffff8f50bd88 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_newlink+0x8db/0x1c70 net/core/rtnetlink.c:4054
#2: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:304 [inline]
#2: ffffffff8e144bf8 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x2f6/0x730 kernel/rcu/tree_exp.h:998
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-syzkaller-00684-ge5cf61fa6e2f #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Call Trace:
dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:158 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:307 [inline]
watchdog+0xfee/0x1030 kernel/hung_task.c:470
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 2983 Comm: kworker/u8:10 Not tainted 6.16.0-syzkaller-00684-ge5cf61fa6e2f #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:rcu_is_watching_curr_cpu include/linux/context_tracking.h:-1 [inline]
RIP: 0010:rcu_is_watching+0x44/0xb0 kernel/rcu/tree.c:745
Code: 73 65 49 bf 00 00 00 00 00 fc ff df 4c 8d 34 dd 70 cc ba 8d 4c 89 f0 48 c1 e8 03 42 80 3c 38 00 74 08 4c 89 f7 e8 bc e5 78 00 <48> c7 c3 58 4f 9f 92 49 03 1e 48 89 d8 48 c1 e8 03 42 0f b6 04 38
RSP: 0018:ffffc9000b9a6c18 EFLAGS: 00000046
RAX: 1ffffffff1b7598f RBX: 0000000000000001 RCX: 455240fa26fa8f00
RDX: ffff8880b8733cb0 RSI: ffffffff8be1f600 RDI: ffffffff8be1f5c0
RBP: ffffc9000b9a6d20 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001734d94 R12: dffffc0000000000
R13: ffffffff8201f124 R14: ffffffff8dbacc78 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff888125d3e000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f2cb06e7d60 CR3: 000000000df38000 CR4: 00000000003526f0
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x4b/0x3e0 kernel/locking/lockdep.c:5882
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:149 [inline]
_raw_spin_unlock_irqrestore+0x70/0x110 kernel/locking/spinlock.c:194
krc_this_cpu_unlock mm/slab_common.c:1451 [inline]
kvfree_call_rcu+0x374/0x410 mm/slab_common.c:1994
cfg80211_update_known_bss+0x634/0x1330 net/wireless/scan.c:1925
__cfg80211_bss_update+0x147/0x2120 net/wireless/scan.c:1972
cfg80211_inform_single_bss_data+0xba9/0x1ac0 net/wireless/scan.c:2363
cfg80211_inform_bss_data+0x1fb/0x3b20 net/wireless/scan.c:3222
cfg80211_inform_bss_frame_data+0x3d7/0x730 net/wireless/scan.c:3313
ieee80211_bss_info_update+0x746/0x9e0 net/mac80211/scan.c:226
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1573 [inline]
ieee80211_ibss_rx_queued_mgmt+0xa36/0x2ae0 net/mac80211/ibss.c:1600
ieee80211_iface_process_skb net/mac80211/iface.c:1670 [inline]
ieee80211_iface_work+0x806/0xfe0 net/mac80211/iface.c:1724
cfg80211_wiphy_work+0x2dc/0x460 net/wireless/core.c:435
process_one_work kernel/workqueue.c:3238 [inline]
process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321
worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402
kthread+0x70e/0x8a0 kernel/kthread.c:464
ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245