INFO: task syz-executor.3:18625 blocked for more than 143 seconds.
Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:27536 pid:18625 tgid:18623 ppid:26645 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf12/0x5c60 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe9/0x280 kernel/sched/core.c:6817
super_lock+0x2bb/0x3f0 fs/super.c:114
user_get_super+0xee/0x230 fs/super.c:993
quotactl_block+0x3d2/0x680 fs/quota/quota.c:890
__do_sys_quotactl fs/quota/quota.c:955 [inline]
__se_sys_quotactl fs/quota/quota.c:917 [inline]
__x64_sys_quotactl+0x173/0x440 fs/quota/quota.c:917
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7efe96c7dda9
RSP: 002b:00007efe979a20c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000b3
RAX: ffffffffffffffda RBX: 00007efe96dabf80 RCX: 00007efe96c7dda9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffff80000901
RBP: 00007efe96cca47a R08: 0000000000000000 R09: 0000000000000000
R10: 00000000200000c0 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007efe96dabf80 R15: 00007ffccfe04e58
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d7ad160 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4815:
#0: ffff888022cbc0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfca/0x1490 drivers/tty/n_tty.c:2201
1 lock held by syz-fuzzer/5391:
2 locks held by syz-executor.3/26137:
2 locks held by kworker/u4:13/6531:
1 lock held by syz-executor.0/22191:
1 lock held by syz-executor.4/22193:
#0: ffffffff8d7b8880 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6c0 kernel/rcu/tree.c:4064
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #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+0xd9/0x1b0 lib/dump_stack.c:106
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:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3b0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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: 22230 Comm: syz-executor.1 Not tainted 6.8.0-rc3-syzkaller-00005-g99bd3cb0d12e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:_compound_head include/linux/page-flags.h:247 [inline]
RIP: 0010:mod_lruvec_page_state include/linux/vmstat.h:575 [inline]
RIP: 0010:account_kernel_stack+0x105/0x2e0 kernel/fork.c:539
Code: 48 8d 2c d8 48 89 e8 48 c1 e8 03 42 80 3c 20 00 0f 85 be 01 00 00 48 8b 6d 00 48 8d 7d 08 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 9a 01 00 00 4c 8b 6d 08 31 ff 4d 89 ee 41 83 e6 01 4c 89 f6
RSP: 0018:ffffc9000439fd80 EFLAGS: 00000246
RAX: 1ffffd4000110089 RBX: 0000000000000003 RCX: ffffffff814e59fa
RDX: ffff888088631dc0 RSI: ffffffff814e5a09 RDI: ffffea0000880448
RBP: ffffea0000880440 R08: 0000000000000005 R09: 0000000000000008
R10: 0000000000000003 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000200 R14: 0000000000000000 R15: ffff888066fa4240
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b32222000 CR3: 000000008b4f6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
exit_task_stack_account+0x23/0xf0 kernel/fork.c:552
do_exit+0x1b60/0x2ad0 kernel/exit.c:912
do_group_exit+0xd4/0x2a0 kernel/exit.c:1020
__do_sys_exit_group kernel/exit.c:1031 [inline]
__se_sys_exit_group kernel/exit.c:1029 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1029
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xd5/0x270 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x6f/0x77
RIP: 0033:0x7f971467dda9
Code: Unable to access opcode bytes at 0x7f971467dd7f.
RSP: 002b:00007ffdb41e1428 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000001e RCX: 00007f971467dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: 000000000000027a R09: 0000000000000000
R10: 0000001b32620000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001