INFO: task syz-executor.2:12845 blocked for more than 143 seconds.
Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27960 pid:12845 tgid:12838 ppid:7118 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x49a0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6874
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a3/0xd70 kernel/locking/mutex.c:752
__fdget_pos+0x258/0x320 fs/file.c:1191
fdget_pos include/linux/file.h:74 [inline]
__do_sys_getdents64 fs/readdir.c:405 [inline]
__se_sys_getdents64+0x1dc/0x4f0 fs/readdir.c:394
do_syscall_64+0xf9/0x240
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7fafaf07dda9
RSP: 002b:00007fafafdfe0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007fafaf1ac050 RCX: 00007fafaf07dda9
RDX: 0000000000000092 RSI: 0000000020000180 RDI: 0000000000000003
RBP: 00007fafaf0ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fafaf1ac050 R15: 00007fff3a3fe548
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130c60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:3/49:
2 locks held by getty/4816:
#0: ffff8880302500a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-fuzzer/5181:
3 locks held by syz-executor.1/11002:
3 locks held by syz-executor.0/11110:
3 locks held by syz-executor.4/12665:
3 locks held by syz-executor.2/12840:
1 lock held by syz-executor.2/12845:
#0: ffff88807d789c48 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x258/0x320 fs/file.c:1191
2 locks held by kworker/u4:1/15019:
2 locks held by syz-executor.0/15317:
2 locks held by syz-executor.1/15318:
1 lock held by syz-executor.3/15321:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
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:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2ef/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1b/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 15317 Comm: syz-executor.0 Not tainted 6.8.0-rc5-syzkaller-00020-g9fc1ccccfd8d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:check_preemption_disabled+0x4d/0x120 lib/smp_processor_id.c:55
Code: 41 a2 a5 74 a9 ff ff ff 7f 74 26 65 48 8b 04 25 28 00 00 00 48 3b 44 24 08 0f 85 cd 00 00 00 89 d8 48 83 c4 10 5b 41 5c 41 5e <41> 5f c3 cc cc cc cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 f7 04 24
RSP: 0018:ffffc900036a71f0 EFLAGS: 00000086
RAX: 0000000000000000 RBX: 0000000000000246 RCX: ffffffff81713c70
RDX: 0000000000000000 RSI: ffffffff8baac340 RDI: ffffffff8bfd9a20
RBP: ffffc900036a7328 R08: ffffffff8f843b6f R09: 1ffffffff1f0876d
R10: dffffc0000000000 R11: fffffbfff1f0876e R12: 1ffff920006d4e4c
R13: ffffffff81f9a50d R14: ffffc900036a72b0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0f1fd4c000 CR3: 000000000df32000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_release+0x187/0x9d0 kernel/locking/lockdep.c:5773
__folio_remove_rmap mm/rmap.c:1553 [inline]
folio_remove_rmap_ptes+0x2ea/0x540 mm/rmap.c:1590
zap_pte_range mm/memory.c:1478 [inline]
zap_pmd_range mm/memory.c:1597 [inline]
zap_pud_range mm/memory.c:1626 [inline]
zap_p4d_range mm/memory.c:1647 [inline]
unmap_page_range+0x1820/0x3600 mm/memory.c:1668
unmap_vmas+0x3cc/0x5f0 mm/memory.c:1758
exit_mmap+0x2c6/0xd40 mm/mmap.c:3279
__mmput+0x115/0x3c0 kernel/fork.c:1343
exit_mm+0x21f/0x310 kernel/exit.c:569
do_exit+0x9af/0x2740 kernel/exit.c:858
do_group_exit+0x206/0x2c0 kernel/exit.c:1020
get_signal+0x176d/0x1850 kernel/signal.c:2893
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0xc8/0x370 kernel/entry/common.c:212
do_syscall_64+0x108/0x240 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f8016a7caef
Code: Unable to access opcode bytes at 0x7f8016a7cac5.
RSP: 002b:00007f8017735e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: 0000000000f89000 RBX: 0000000001000000 RCX: 00007f8016a7caef
RDX: 0000000001000000 RSI: 00007f800d000000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000097b7
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f8017735f80 R14: 00007f8017735f40 R15: 00007f800d000000