INFO: task syz.0.16:6430 blocked for more than 143 seconds.
Not tainted syzkaller #0
Blocked by coredump.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.16 state:D stack:25144 pid:6430 tgid:6430 ppid:6311 task_flags:0x40004c flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5260 [inline]
__schedule+0x14ea/0x5050 kernel/sched/core.c:6867
__schedule_loop kernel/sched/core.c:6949 [inline]
schedule+0x164/0x360 kernel/sched/core.c:6964
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7021
rwsem_down_write_slowpath+0x899/0x1040 kernel/locking/rwsem.c:1185
__down_write_common kernel/locking/rwsem.c:1317 [inline]
__down_write kernel/locking/rwsem.c:1326 [inline]
down_write+0x1bc/0x200 kernel/locking/rwsem.c:1591
mmap_write_lock include/linux/mmap_lock.h:335 [inline]
exit_mmap+0x293/0xb30 mm/mmap.c:1285
__mmput+0x118/0x430 kernel/fork.c:1173
exit_mm+0x168/0x220 kernel/exit.c:581
do_exit+0x62e/0x2310 kernel/exit.c:959
do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
__do_sys_exit_group kernel/exit.c:1123 [inline]
__se_sys_exit_group kernel/exit.c:1121 [inline]
__x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121
x64_sys_call+0x2210/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xe2/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f254fd988f9
RSP: 002b:00007ffe97a46148 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f254fd988f9
RDX: 0000000000000064 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000003 R08: 0000000000000000 R09: 00007f254ff96260
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f254ff96260 R14: 0000000000000003 R15: 00007ffe97a46200
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8e55a360 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8e55a360 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:867 [inline]
#0: ffffffff8e55a360 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by udevd/5200:
#0: ffffffff8e624530 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm kernel/fork.c:1528 [inline]
#0: ffffffff8e624530 (dup_mmap_sem){.+.+}-{0:0}, at: copy_mm+0x130/0x4b0 kernel/fork.c:1581
#1: ffff88807c8f4cc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
#1: ffff88807c8f4cc0 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x153/0x1bb0 mm/mmap.c:1726
2 locks held by getty/5591:
#0: ffff88814e1700a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45c/0x13c0 drivers/tty/n_tty.c:2211
1 lock held by syz.0.16/6430:
#0: ffff88807a098340 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807a098340 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by udevd/6436:
#0: ffff88807a09d900 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:353 [inline]
#0: ffff88807a09d900 (&mm->mmap_lock){++++}-{4:4}, at: __vm_munmap+0x163/0x3d0 mm/vma.c:3244
1 lock held by syz.1.17/6454:
#0: ffff88807c49d900 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807c49d900 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.2.18/6476:
#0: ffff888034992800 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff888034992800 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz-executor/6483:
#0: ffff8880274f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff8880274f1bc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.3.19/6506:
#0: ffff8880207cf180 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff8880207cf180 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.4.20/6536:
#0: ffff8880788eccc0 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff8880788eccc0 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.5.21/6562:
#0: ffff88807a09f180 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807a09f180 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz-executor/6566:
#0: ffff88807a09c080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807a09c080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.6.22/6592:
#0: ffff88807b4fb440 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807b4fb440 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.7.23/6629:
#0: ffff88807c294080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807c294080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz-executor/6632:
#0: ffff88807cb7c080 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807cb7c080 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.8.25/6660:
#0: ffff8880274f0f80 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff8880274f0f80 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
1 lock held by syz.9.26/6694:
#0: ffff88807cb7e540 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:335 [inline]
#0: ffff88807cb7e540 (&mm->mmap_lock){++++}-{4:4}, at: exit_mmap+0x293/0xb30 mm/mmap.c:1285
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 31 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:161 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:346 [inline]
watchdog+0xf90/0xfe0 kernel/hung_task.c:515
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 6663 Comm: kworker/u8:17 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/13/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:unwind_next_frame+0x484/0x23c0 arch/x86/kernel/unwind_orc.c:520
Code: d2 84 c0 48 0f 45 d1 48 89 15 88 4c 83 11 48 85 d2 0f 84 40 02 00 00 4c 8d 62 04 4c 8d 6a 05 4c 89 e0 48 c1 e8 03 0f b6 04 28 <84> c0 0f 85 66 18 00 00 4c 89 e8 48 c1 e8 03 0f b6 04 28 84 c0 0f
RSP: 0018:ffffc9000510e9d8 EFLAGS: 00000a07
RAX: 0000000000000000 RBX: ffffffff90080a9c RCX: ffffffff90080aa0
RDX: ffffffff9083c360 RSI: ffffffff9083c360 RDI: ffffffff8c073920
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff8e55a360
R10: ffffc9000510eaf8 R11: ffffffff81afb290 R12: ffffffff9083c364
R13: ffffffff9083c365 R14: ffffc9000510eaa8 R15: ffffffff90080a9c
FS: 0000000000000000(0000) GS:ffff8881257f8000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055557e3994e8 CR3: 000000000e346000 CR4: 00000000003526f0
Call Trace:
arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:57 [inline]
kasan_save_track+0x3e/0x80 mm/kasan/common.c:78
poison_kmalloc_redzone mm/kasan/common.c:398 [inline]
__kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:415
kasan_kmalloc include/linux/kasan.h:263 [inline]
__do_kmalloc_node mm/slub.c:5657 [inline]
__kmalloc_noprof+0x40c/0x7e0 mm/slub.c:5669
kmalloc_noprof include/linux/slab.h:961 [inline]
kzalloc_noprof include/linux/slab.h:1094 [inline]
cfg80211_inform_single_bss_data+0x934/0x1ab0 net/wireless/scan.c:2345
cfg80211_inform_bss_data+0x23f/0x3c20 net/wireless/scan.c:3228
cfg80211_inform_bss_frame_data+0x3c7/0x710 net/wireless/scan.c:3319
ieee80211_bss_info_update+0x794/0xa40 net/mac80211/scan.c:230
ieee80211_rx_bss_info net/mac80211/ibss.c:1094 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1575 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1901/0x2c80 net/mac80211/ibss.c:1602
ieee80211_iface_process_skb net/mac80211/iface.c:1740 [inline]
ieee80211_iface_work+0x85e/0x12b0 net/mac80211/iface.c:1794
cfg80211_wiphy_work+0x2ab/0x450 net/wireless/core.c:438
process_one_work kernel/workqueue.c:3257 [inline]
process_scheduled_works+0xaec/0x17a0 kernel/workqueue.c:3340
worker_thread+0xda6/0x1360 kernel/workqueue.c:3421
kthread+0x726/0x8b0 kernel/kthread.c:463
ret_from_fork+0x51b/0xa40 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246