INFO: task syz-executor.1:18860 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27320 pid:18860 tgid:18859 ppid:17818 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a4/0xd70 kernel/locking/mutex.c:752
exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
iterate_supers+0xc6/0x190 fs/super.c:922
ksys_sync+0xdb/0x1c0 fs/sync.c:104
__do_sys_sync+0xe/0x20 fs/sync.c:113
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb86787dea9
RSP: 002b:00007fb8673ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2
RAX: ffffffffffffffda RBX: 00007fb8679abf80 RCX: 00007fb86787dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007fb8678ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb8679abf80 R15: 00007fff2ff75718
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u8:2/34:
#0: ffff8880b953e658 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9528948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by kworker/u8:8/2453:
#0: ffff8880b943e658 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2a/0x140 kernel/sched/core.c:559
#1: ffff8880b9428948 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x441/0x770 kernel/sched/psi.c:988
2 locks held by getty/4827:
#0: ffff88802aaa90a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc9000312b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by syz-executor.4/18446:
2 locks held by syz-executor.1/18860:
#0: ffff88805ddc40e0 (&type->s_umount_key#64){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805ddc40e0 (&type->s_umount_key#64){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880246100e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
2 locks held by syz-executor.2/18938:
#0: ffff88805ddc40e0 (&type->s_umount_key#64){++++}-{3:3}, at: __super_lock fs/super.c:58 [inline]
#0: ffff88805ddc40e0 (&type->s_umount_key#64){++++}-{3:3}, at: super_lock+0x27c/0x400 fs/super.c:120
#1: ffff8880246100e0 (&sbi->s_lock){+.+.}-{3:3}, at: exfat_sync_fs+0x6b/0x100 fs/exfat/super.c:53
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f0/0x390 kernel/kthread.c:388
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 PID: 2453 Comm: kworker/u8:8 Not tainted 6.9.0-rc5-syzkaller-00025-ga2c63a3f3d68 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: bat_events batadv_iv_send_outstanding_bat_ogm_packet
RIP: 0010:check_kcov_mode kernel/kcov.c:173 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:236 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0xa4/0x120 kernel/kcov.c:341
Code: 8b 00 00 00 4c 8b 4c 24 20 65 4c 8b 1c 25 80 d3 03 00 31 d2 eb 08 48 ff c2 49 39 d2 74 71 4c 8b 74 d6 10 65 8b 05 f4 cc 6d 7e 00 01 ff 00 74 11 a9 00 01 00 00 74 de 41 83 bb 14 16 00 00 00
RSP: 0018:ffffc9000983f3a0 EFLAGS: 00000202
RAX: 0000000080000001 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 0000000000000002 RSI: ffffffff8e1a2fa0 RDI: 0000000000000001
RBP: ffffffff902acfe0 R08: 0000000000000005 R09: ffffffff814158df
R10: 0000000000000003 R11: ffff888029a70000 R12: ffffc9000983fed8
R13: dffffc0000000000 R14: 0000000000000004 R15: 1ffff92001307e94
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055f814e4a680 CR3: 0000000063178000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x196f/0x2a00 arch/x86/kernel/unwind_orc.c:641
arch_stack_walk+0x151/0x1b0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x118/0x1d0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:47 [inline]
kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
poison_kmalloc_redzone mm/kasan/common.c:370 [inline]
__kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387
kasan_kmalloc include/linux/kasan.h:211 [inline]
__do_kmalloc_node mm/slub.c:3966 [inline]
__kmalloc_node_track_caller+0x24e/0x4e0 mm/slub.c:3986
kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:599
pskb_expand_head+0x202/0x1390 net/core/skbuff.c:2245
__skb_cow include/linux/skbuff.h:3676 [inline]
skb_cow_head include/linux/skbuff.h:3710 [inline]
batadv_skb_head_push+0x164/0x200 net/batman-adv/soft-interface.c:72
batadv_send_skb_packet+0xee/0x670 net/batman-adv/send.c:86
batadv_iv_ogm_send_to_if net/batman-adv/bat_iv_ogm.c:392 [inline]
batadv_iv_ogm_emit net/batman-adv/bat_iv_ogm.c:420 [inline]
batadv_iv_send_outstanding_bat_ogm_packet+0x673/0x810 net/batman-adv/bat_iv_ogm.c:1700
process_one_work kernel/workqueue.c:3254 [inline]
process_scheduled_works+0xa10/0x17c0 kernel/workqueue.c:3335
worker_thread+0x86d/0xd70 kernel/workqueue.c:3416
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244