INFO: task syz.0.260:7430 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.260 state:D stack:24768 pid:7430 tgid:7427 ppid:5809 task_flags:0x400140 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5298 [inline]
__schedule+0x1553/0x5240 kernel/sched/core.c:6911
__schedule_loop kernel/sched/core.c:6993 [inline]
schedule+0x164/0x360 kernel/sched/core.c:7008
io_schedule+0x80/0xe0 kernel/sched/core.c:7835
folio_wait_bit_common+0x6dd/0xbc0 mm/filemap.c:1323
folio_lock include/linux/pagemap.h:1159 [inline]
release_metapage+0x103/0xab0 fs/jfs/jfs_metapage.c:870
discard_metapage fs/jfs/jfs_metapage.h:88 [inline]
__get_metapage+0x9a3/0xde0 fs/jfs/jfs_metapage.c:753
jfs_readdir+0x1ea3/0x3c10 fs/jfs/jfs_dtree.c:3041
wrap_directory_iterator+0x99/0xe0 fs/readdir.c:65
iterate_dir+0x3a5/0x580 fs/readdir.c:108
__do_sys_getdents64 fs/readdir.c:412 [inline]
__se_sys_getdents64+0xf1/0x280 fs/readdir.c:397
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4243f4c819
RSP: 002b:00007f42421a6028 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f42441c5fa0 RCX: 00007f4243f4c819
RDX: 0000000000000091 RSI: 0000200000000440 RDI: 0000000000000006
RBP: 00007f4243fe2c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f42441c6038 R14: 00007f42441c5fa0 R15: 00007ffeb2431c68
Showing all locks held in the system:
3 locks held by rcuc/1/28:
1 lock held by khungtaskd/38:
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:312 [inline]
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:850 [inline]
#0: ffffffff8ddcb980 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
3 locks held by kworker/u8:6/149:
2 locks held by getty/5553:
#0: ffff8880282790a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90003e8b2e0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x462/0x13c0 drivers/tty/n_tty.c:2211
1 lock held by udevd/5804:
1 lock held by udevd/5814:
1 lock held by udevd/6012:
1 lock held by udevd/6016:
2 locks held by syz.0.260/7430:
#0: ffff88802234f728 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x252/0x320 fs/file.c:1261
#1: ffff88803fb4c9f8 (&type->i_mutex_dir_key#13){++++}-{4:4}, at: wrap_directory_iterator+0x5d/0xe0 fs/readdir.c:54
2 locks held by syz-executor/7994:
2 locks held by syz.2.535/9230:
2 locks held by syz.6.539/9239:
#0: ffff88803fc520d0 (&type->s_umount_key#69/1){+.+.}-{4:4}, at: alloc_super+0x28c/0xac0 fs/super.c:345
#1: ffffffff8dea9d58 (lock#3){+.+.}-{4:4}, at: __lru_add_drain_all+0x6b/0x5e0 mm/swap.c:840
2 locks held by syz.1.542/9271:
2 locks held by dhcpcd-run-hook/9273:
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 38 Comm: khungtaskd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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+0xfd9/0x1030 kernel/hung_task.c:515
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x51e/0xb90 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 6012 Comm: udevd Not tainted syzkaller #0 PREEMPT_{RT,(full)}
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:185 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x3f/0x80 kernel/kcov.c:217
Code: 8a 10 81 e6 00 00 ff 00 ba 00 01 00 00 23 91 a4 0b 00 00 89 d7 09 f7 74 11 85 f6 75 39 85 d2 74 35 83 b9 74 16 00 00 00 74 2c <8b> 91 50 16 00 00 83 fa 02 75 21 48 8b 91 58 16 00 00 48 8b 32 48
RSP: 0018:ffffc9000518f3f8 EFLAGS: 00000246
RAX: ffffffff8b1d28d8 RBX: 00007f4d7d2b1000 RCX: ffff888024c70000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000518f5f0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000003 R12: 0000000000000000
R13: 00007f4d7d2b6fff R14: 0000000000000001 R15: 0000000000000002
FS: 00007f4d7ca73880(0000) GS:ffff888126332000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4d7c101000 CR3: 0000000024492000 CR4: 00000000003526f0
Call Trace:
mas_validate_gaps lib/maple_tree.c:6900 [inline]
mt_validate+0x2778/0x4340 lib/maple_tree.c:7176
validate_mm+0xd4/0x4c0 mm/vma.c:649
__split_vma+0x8e4/0xa30 mm/vma.c:567
vms_gather_munmap_vmas+0x4fa/0x1370 mm/vma.c:1429
do_vmi_align_munmap+0x2c7/0x4d0 mm/vma.c:1576
do_vmi_munmap+0x252/0x2d0 mm/vma.c:1633
__vm_munmap+0x22c/0x3d0 mm/vma.c:3261
__do_sys_munmap mm/mmap.c:1078 [inline]
__se_sys_munmap mm/mmap.c:1075 [inline]
__x64_sys_munmap+0x60/0x70 mm/mmap.c:1075
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4d7cbd8097
Code: 73 01 c3 48 8b 0d 61 2d 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 0b 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 31 2d 0d 00 f7 d8 64 89 01 48
RSP: 002b:00007ffc242dc148 EFLAGS: 00000246 ORIG_RAX: 000000000000000b
RAX: ffffffffffffffda RBX: 000055fdee056640 RCX: 00007f4d7cbd8097
RDX: 000055fdee032d68 RSI: 0000000000000200 RDI: 00007f4d7c104000
RBP: 000055fdee04eff0 R08: 0000000000000030 R09: 0000000000040000
R10: 000055fdee04efe0 R11: 0000000000000246 R12: 00007f4d7d2b57c0
R13: 00007f4d7d2b739c R14: 0000000000000022 R15: 0000000000000001