INFO: task syz.4.348:7136 blocked for more than 143 seconds.
Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.348 state:D stack:27392 pid:7136 tgid:7127 ppid:5838 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6760
__schedule_loop kernel/sched/core.c:6837 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6852
d_wait_lookup fs/dcache.c:2511 [inline]
d_alloc_parallel+0xc3c/0x1630 fs/dcache.c:2593
__lookup_slow+0x117/0x400 fs/namei.c:1784
lookup_slow+0x53/0x70 fs/namei.c:1816
walk_component+0x2eb/0x410 fs/namei.c:2120
lookup_last fs/namei.c:2618 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2642
filename_lookup+0x2a6/0x670 fs/namei.c:2671
user_path_at+0x3a/0x60 fs/namei.c:3078
do_mount fs/namespace.c:3996 [inline]
__do_sys_mount fs/namespace.c:4210 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4187
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c33d8cde9
RSP: 002b:00007f7c31b4f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7c33fa6160 RCX: 00007f7c33d8cde9
RDX: 0000000000000000 RSI: 0000400000000180 RDI: 0000400000000200
RBP: 00007f7c33e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000003333404 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7c33fa6160 R15: 00007ffee229e878
INFO: task syz.4.348:7137 blocked for more than 144 seconds.
Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.348 state:D stack:27392 pid:7137 tgid:7127 ppid:5838 task_flags:0x400140 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6760
__schedule_loop kernel/sched/core.c:6837 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6852
d_wait_lookup fs/dcache.c:2511 [inline]
d_alloc_parallel+0xc3c/0x1630 fs/dcache.c:2593
__lookup_slow+0x117/0x400 fs/namei.c:1784
lookup_slow+0x53/0x70 fs/namei.c:1816
walk_component+0x2eb/0x410 fs/namei.c:2120
lookup_last fs/namei.c:2618 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2642
filename_lookup+0x2a6/0x670 fs/namei.c:2671
user_path_at+0x3a/0x60 fs/namei.c:3078
do_mount fs/namespace.c:3996 [inline]
__do_sys_mount fs/namespace.c:4210 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4187
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c33d8cde9
RSP: 002b:00007f7c3172c038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7c33fa6240 RCX: 00007f7c33d8cde9
RDX: 0000000000000000 RSI: 0000400000000100 RDI: 0000400000000300
RBP: 00007f7c33e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000011080 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f7c33fa6240 R15: 00007ffee229e878
INFO: task syz.4.348:7138 blocked for more than 145 seconds.
Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.348 state:D stack:24888 pid:7138 tgid:7127 ppid:5838 task_flags:0x400140 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5373 [inline]
__schedule+0x190e/0x4c90 kernel/sched/core.c:6760
__schedule_loop kernel/sched/core.c:6837 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6852
d_wait_lookup fs/dcache.c:2511 [inline]
d_alloc_parallel+0xc3c/0x1630 fs/dcache.c:2593
__lookup_slow+0x117/0x400 fs/namei.c:1784
lookup_slow+0x53/0x70 fs/namei.c:1816
walk_component+0x2eb/0x410 fs/namei.c:2120
lookup_last fs/namei.c:2618 [inline]
path_lookupat+0x169/0x440 fs/namei.c:2642
filename_lookup+0x2a6/0x670 fs/namei.c:2671
user_path_at+0x3a/0x60 fs/namei.c:3078
do_mount fs/namespace.c:3996 [inline]
__do_sys_mount fs/namespace.c:4210 [inline]
__se_sys_mount+0x297/0x3c0 fs/namespace.c:4187
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f7c33d8cde9
RSP: 002b:00007f7c31309038 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f7c33fa6320 RCX: 00007f7c33d8cde9
RDX: 0000000000000000 RSI: 0000400000000280 RDI: 0000400000000240
RBP: 00007f7c33e0e2a0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000001005848 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7c33fa6320 R15: 00007ffee229e878
Showing all locks held in the system:
2 locks held by kworker/0:0/8:
4 locks held by kworker/u8:0/11:
1 lock held by khungtaskd/30:
#0: ffffffff8eb3b520 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
#0: ffffffff8eb3b520 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline]
#0: ffffffff8eb3b520 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6746
3 locks held by kworker/u8:5/65:
2 locks held by getty/5587:
#0: ffff888035c520a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002fce2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x616/0x1770 drivers/tty/n_tty.c:2211
2 locks held by syz-executor/5848:
2 locks held by syz-executor/5850:
3 locks held by kworker/0:4/5883:
#0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3211 [inline]
#0: ffff88801b080d48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x98b/0x18e0 kernel/workqueue.c:3317
#1: ffffc9000437fc60 (key_gc_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3212 [inline]
#1: ffffc9000437fc60 (key_gc_work){+.+.}-{0:0}, at: process_scheduled_works+0x9c6/0x18e0 kernel/workqueue.c:3317
#2: ffffffff8eb40a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: exp_funnel_lock kernel/rcu/tree_exp.h:336 [inline]
#2: ffffffff8eb40a38 (rcu_state.exp_mutex){+.+.}-{4:4}, at: synchronize_rcu_expedited+0x451/0x820 kernel/rcu/tree_exp.h:998
1 lock held by syz.4.348/7132:
1 lock held by syz.4.348/7136:
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1815
1 lock held by syz.4.348/7137:
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1815
1 lock held by syz.4.348/7138:
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: inode_lock_shared include/linux/fs.h:877 [inline]
#0: ffff8880598f8180 (&type->i_mutex_dir_key#19){.+.+}-{4:4}, at: lookup_slow+0x45/0x70 fs/namei.c:1815
2 locks held by syz.5.708/8519:
#0: ffff8880129d5490 (&uprobe->register_rwsem){+.+.}-{4:4}, at: uprobe_unregister_nosync+0x30/0x1d0 kernel/events/uprobes.c:1316
#1: ffffffff8ebf1850 (dup_mmap_sem){++++}-{0:0}, at: register_for_each_vma+0x32/0xc90 kernel/events/uprobes.c:1253
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
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:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:236 [inline]
watchdog+0x1058/0x10a0 kernel/hung_task.c:399
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 65 Comm: kworker/u8:5 Not tainted 6.14.0-rc2-next-20250214-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Workqueue: bat_events batadv_nc_worker
RIP: 0010:trace_irq_disable+0x36/0x120 include/trace/events/preemptirq.h:36
Code: 83 f8 08 73 3f 89 c3 48 89 d8 48 c1 e8 06 48 8d 3c c5 70 93 3d 90 be 08 00 00 00 e8 84 b8 5f 00 48 0f a3 1d 7c ad 73 0e 73 12 25 97 dd ff 84 c0 75 09 80 3d 6b bf 5d 0e 00 74 0e 5b 41 5e c3
RSP: 0018:ffffc9000215f948 EFLAGS: 00000057
RAX: 0000000000000001 RBX: 0000000000000001 RCX: ffffffff81c9e5ec
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff903d9370
RBP: ffffc9000215fa10 R08: ffffffff903d9377 R09: 1ffffffff207b26e
R10: dffffc0000000000 R11: fffffbfff207b26f R12: dffffc0000000000
R13: 1ffff9200042bf34 R14: ffffc9000215f9a0 R15: 0000000000000201
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f344557b338 CR3: 000000007b4aa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__local_bh_enable_ip+0x106/0x200 kernel/softirq.c:371
spin_unlock_bh include/linux/spinlock.h:396 [inline]
batadv_nc_purge_paths+0x312/0x3b0 net/batman-adv/network-coding.c:471
batadv_nc_worker+0x328/0x610 net/batman-adv/network-coding.c:720
process_one_work kernel/workqueue.c:3236 [inline]
process_scheduled_works+0xabe/0x18e0 kernel/workqueue.c:3317
worker_thread+0x870/0xd30 kernel/workqueue.c:3398
kthread+0x7a9/0x920 kernel/kthread.c:464
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244