INFO: task syz-executor:4272 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor state:D stack:22000 pid:4272 ppid:1 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
io_schedule+0x7c/0xd0 kernel/sched/core.c:8798
folio_wait_bit_common+0x70a/0xfa0 mm/filemap.c:1324
truncate_inode_pages_range+0x9fe/0x1090 mm/truncate.c:447
evict+0x4dc/0x8d0 fs/inode.c:707
dispose_list fs/inode.c:738 [inline]
evict_inodes+0x60c/0x6a0 fs/inode.c:792
generic_shutdown_super+0x93/0x340 fs/super.c:480
kill_block_super+0x7c/0xe0 fs/super.c:1470
deactivate_locked_super+0x93/0xf0 fs/super.c:332
cleanup_mnt+0x42c/0x4b0 fs/namespace.c:1191
task_work_run+0x1d0/0x260 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f815d19c117
RSP: 002b:00007fffe93ff1d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f815d20471f RCX: 00007f815d19c117
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fffe93ff290
RBP: 00007fffe93ff290 R08: 00007fffe9400290 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fffe9400320
R13: 00007f815d20471f R14: 0000000000023d4f R15: 00007fffe9400360
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
2 locks held by getty/4028:
#0: ffff88814cef9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
1 lock held by syz-executor/4272:
#0: ffff888055d5a0e0 (&type->s_umount_key#104){++++}-{3:3}, at: deactivate_super+0xa0/0xd0 fs/super.c:362
3 locks held by kworker/u4:8/6584:
#0: ffff8880b8e3ab18 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:538
#1: ffff8880b8e27888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x312/0x6d0 kernel/sched/psi.c:987
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: batadv_mcast_mla_rtr_flags_softif_get net/batman-adv/multicast.c:172 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: batadv_mcast_mla_rtr_flags_get net/batman-adv/multicast.c:233 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: batadv_mcast_mla_flags_get net/batman-adv/multicast.c:258 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: __batadv_mcast_mla_update net/batman-adv/multicast.c:877 [inline]
#2: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: batadv_mcast_mla_update+0x139/0x32c0 net/batman-adv/multicast.c:916
1 lock held by syz.5.1865/8540:
#0: ffff888055d5a0e0 (&type->s_umount_key#104){++++}-{3:3}, at: iterate_supers+0xa4/0x1d0 fs/super.c:755
2 locks held by kworker/u4:14/8619:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4255 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:files_lookup_fd_raw include/linux/fdtable.h:86 [inline]
RIP: 0010:__fget_light fs/file.c:993 [inline]
RIP: 0010:__fdget fs/file.c:1006 [inline]
RIP: 0010:__fdget_pos+0x9b/0x360 fs/file.c:1033
Code: fb 2d 99 ff 83 fd 01 0f 85 d8 00 00 00 49 83 c7 58 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 68 15 ea ff 4d 8b 37 <4c> 89 f0 48 c1 e8 03 42 0f b6 04 20 84 c0 0f 85 36 02 00 00 45 8b
RSP: 0018:ffffc90003d57e20 EFLAGS: 00000246
RAX: 1ffff1100624a263 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff88802c443b80 RSI: 0000000000000001 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffff8880312512c3 R09: 1ffff1100624a258
R10: dffffc0000000000 R11: ffffed100624a259 R12: dffffc0000000000
R13: 1ffff1100588888f R14: ffff888141f75680 R15: ffff888031251318
FS: 0000555582909500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff8345e1198 CR3: 00000000785c4000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fdget_pos include/linux/file.h:74 [inline]
ksys_read+0x78/0x250 fs/read_write.c:604
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f03c2b560d7
Code: 48 89 fa 4c 89 df e8 a8 56 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007ffc4a192c30 EFLAGS: 00000202 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000555582909500 RCX: 00007f03c2b560d7
RDX: 0000000000000004 RSI: 00007ffc4a192c8c RDI: 0000000000000003
RBP: 00007ffc4a193130 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000004
R13: 00007ffc4a192c8c R14: 00007ffc4a192d20 R15: 0000000000000000