INFO: task syz.2.268:6530 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-syzkaller-00260-g9e4c6c1ad9a1 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.268 state:D stack:24960 pid:6530 tgid:6528 ppid:5233 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0xef5/0x5750 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6774
schedule_timeout+0x258/0x2a0 kernel/time/timer.c:2591
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common+0x3e1/0x600 kernel/sched/completion.c:116
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:264
coredump_wait fs/coredump.c:418 [inline]
do_coredump+0x82f/0x4160 fs/coredump.c:575
get_signal+0x237c/0x26d0 kernel/signal.c:2902
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x150/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xda/0x250 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f43dbb7dff9
RSP: 002b:00007f43dc8cb0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007f43dbd36060 RCX: 00007f43dbb7dff9
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f43dbd36064
RBP: 00007f43dbd36058 R08: 00007f43dc8ed080 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 00007f43dbd36064
R13: 0000000000000000 R14: 00007ffc8027c880 R15: 00007ffc8027c968
Showing all locks held in the system:
1 lock held by khungtaskd/30:
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
#0: ffffffff8ddb7800 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720
2 locks held by getty/4993:
#0: ffff8880318aa0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900031232f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211
2 locks held by kworker/u8:24/5763:
1 lock held by syz.2.268/6529:
5 locks held by syz.2.561/8566:
1 lock held by syz.0.572/8592:
3 locks held by syz.0.582/8645:
2 locks held by syz.0.582/8656:
3 locks held by syz.0.602/8729:
2 locks held by syz.1.607/8737:
1 lock held by syz.0.612/8767:
#0: ffff88807b978198 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff88807b978198 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x360 mm/util.c:586
1 lock held by syz.0.612/8768:
#0: ffff88807b978198 (&mm->mmap_lock){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:122 [inline]
#0: ffff88807b978198 (&mm->mmap_lock){++++}-{3:3}, at: vm_mmap_pgoff+0x160/0x360 mm/util.c:586
2 locks held by syz.0.612/8771:
2 locks held by syz.3.613/8769:
=============================================
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-syzkaller-00260-g9e4c6c1ad9a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf0c/0x1240 kernel/hung_task.c:379
kthread+0x2c1/0x3a0 kernel/kthread.c:389
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
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: 6613 Comm: syz-executor Not tainted 6.12.0-rc2-syzkaller-00260-g9e4c6c1ad9a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0033:0x7f830cf74207
Code: 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 31 c9 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 80 3d 31 83 19 00 00 <49> 89 ca 74 14 b8 3d 00 00 00 0f 05 48 3d 00 f0 ff ff 77 5d c3 0f
RSP: 002b:00007ffd0c7e0818 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000212 RCX: 0000000000000000
RDX: 0000000040000001 RSI: 00007ffd0c7e084c RDI: 00000000ffffffff
RBP: 00007ffd0c7e084c R08: 0000000000000000 R09: 00007f830de35080
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000000032
R13: 000000000004dc47 R14: 000000000004d895 R15: 00007ffd0c7e08a0
FS: 0000555589183500 GS: 0000000000000000