[syzbot] [mm?] [input?] [usb?] INFO: rcu detected stall in brk (2)

Hello,

syzbot found the following issue on:

HEAD commit: c6d9e43954bf Merge 6.12-rc4 into usb-next
git tree: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
console output: https://syzkaller.appspot.com/x/log.txt?x=175cbe5f980000
kernel config: https://syzkaller.appspot.com/x/.config?x=5aceb1f10131390c
dashboard link: https://syzkaller.appspot.com/bug?extid=7402e6c8042635c93ead
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17b3cca7980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/fe53e83da4bf/disk-c6d9e439.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/a9135a278859/vmlinux-c6d9e439.xz
kernel image: https://storage.googleapis.com/syzbot-assets/72fb7499fd06/bzImage-c6d9e439.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: [email protected]

rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: {
1-...D } 2636 jiffies s: 1593 root: 0x2/.
rcu: blocking rcu_node structures (internal RCU debug):

Sending NMI from CPU 0 to CPUs 1:
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 10933 Comm: modprobe Not tainted 6.12.0-rc4-syzkaller-00052-gc6d9e43954bf #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:io_serial_in+0x87/0xb0 drivers/tty/serial/8250/8250_port.c:407
Code: 68 b5 fe 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 1a 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 cc cc cc cc e8 78 ef 0d ff eb a2 e8 01 f0
RSP: 0018:ffffc900001b80a8 EFLAGS: 00000002
RAX: dffffc0000000060 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff82a08a30 RDI: ffffffff93637660
RBP: ffffffff93637620 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000020 R14: fffffbfff26c6f1e R15: dffffc0000000000
FS: 00007f1b331b7380(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1b3323219c CR3: 0000000119252000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<IRQ>
serial_in drivers/tty/serial/8250/8250.h:137 [inline]
serial_lsr_in drivers/tty/serial/8250/8250.h:159 [inline]
wait_for_lsr+0xda/0x180 drivers/tty/serial/8250/8250_port.c:2068
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3315 [inline]
serial8250_console_write+0xf5a/0x17c0 drivers/tty/serial/8250/8250_port.c:3393
console_emit_next_record kernel/printk/printk.c:3092 [inline]
console_flush_all+0x800/0xc60 kernel/printk/printk.c:3180
__console_flush_and_unlock kernel/printk/printk.c:3239 [inline]
console_unlock+0xd9/0x210 kernel/printk/printk.c:3279
vprintk_emit+0x424/0x6f0 kernel/printk/printk.c:2407
vprintk+0x7f/0xa0 kernel/printk/printk_safe.c:68
_printk+0xc8/0x100 kernel/printk/printk.c:2432
printk_stack_address arch/x86/kernel/dumpstack.c:72 [inline]
show_trace_log_lvl+0x21f/0x3d0 arch/x86/kernel/dumpstack.c:285
sched_show_task kernel/sched/core.c:7604 [inline]
sched_show_task+0x3f0/0x5f0 kernel/sched/core.c:7579
show_state_filter+0xee/0x320 kernel/sched/core.c:7649
k_spec drivers/tty/vt/keyboard.c:667 [inline]
k_spec+0xed/0x150 drivers/tty/vt/keyboard.c:656
kbd_keycode drivers/tty/vt/keyboard.c:1522 [inline]
kbd_event+0xcbd/0x17a0 drivers/tty/vt/keyboard.c:1541
input_handler_events_default+0x116/0x1b0 drivers/input/input.c:2549
input_pass_values+0x777/0x8e0 drivers/input/input.c:126
input_event_dispose drivers/input/input.c:341 [inline]
input_handle_event+0xf0b/0x14d0 drivers/input/input.c:369
input_event drivers/input/input.c:398 [inline]
input_event+0x83/0xa0 drivers/input/input.c:390
input_sync include/linux/input.h:451 [inline]
hidinput_report_event+0xb2/0x100 drivers/hid/hid-input.c:1736
hid_report_raw_event+0x274/0x11c0 drivers/hid/hid-core.c:2047
__hid_input_report.constprop.0+0x341/0x440 drivers/hid/hid-core.c:2110
hid_irq_in+0x35e/0x870 drivers/hid/usbhid/hid-core.c:285
__usb_hcd_giveback_urb+0x389/0x6e0 drivers/usb/core/hcd.c:1650
usb_hcd_giveback_urb+0x396/0x450 drivers/usb/core/hcd.c:1734
dummy_timer+0x17f0/0x3930 drivers/usb/gadget/udc/dummy_hcd.c:1993
__run_hrtimer kernel/time/hrtimer.c:1691 [inline]
__hrtimer_run_queues+0x20a/0xae0 kernel/time/hrtimer.c:1755
hrtimer_run_softirq+0x17d/0x350 kernel/time/hrtimer.c:1772
handle_softirqs+0x206/0x8d0 kernel/softirq.c:554
__do_softirq kernel/softirq.c:588 [inline]
invoke_softirq kernel/softirq.c:428 [inline]
__irq_exit_rcu kernel/softirq.c:637 [inline]
irq_exit_rcu+0xac/0x110 kernel/softirq.c:649
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1049 [inline]
sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1049
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:__sanitizer_cov_trace_pc+0x66/0x70 kernel/kcov.c:235
Code: 82 30 15 00 00 83 f8 02 75 20 48 8b 8a 38 15 00 00 8b 92 34 15 00 00 48 8b 01 48 83 c0 01 48 39 d0 73 07 48 89 01 48 89 34 c1 <c3> cc cc cc cc 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90002dc7a50 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000001 RCX: dffffc0000000000
RDX: ffff88810fed9d40 RSI: ffffffff86e3ce73 RDI: 0000000000000005
RBP: ffff888124e21e00 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88811972fe00
R13: ffffc90002dc7b88 R14: ffff88811ad2a540 R15: ffffc90002dc7bc5
mas_next_slot+0x12d3/0x21b0 lib/maple_tree.c:4693
mas_find+0x2c6/0x530 lib/maple_tree.c:6059
vma_next include/linux/mm.h:1007 [inline]
validate_mm+0xeb/0x4d0 mm/vma.c:535
do_brk_flags+0x943/0x1260 mm/mmap.c:1781
__do_sys_brk+0x68e/0xa20 mm/mmap.c:197
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1b3330fc7c
Code: 1a 64 c7 03 01 00 00 00 eb 11 64 44 89 23 31 f6 5b 31 ff 5d 41 5c e9 41 ff ff ff 5b 83 c8 ff 5d 41 5c c3 b8 0c 00 00 00 0f 05 <48> 8b 15 d5 61 0d 00 45 31 c0 48 89 02 48 39 c7 76 12 48 8b 05 73
RSP: 002b:00007ffd9efad018 EFLAGS: 00000206 ORIG_RAX: 000000000000000c
RAX: ffffffffffffffda RBX: 0000000000021000 RCX: 00007f1b3330fc7c
RDX: 00007f1b333ee1b8 RSI: 00007f1b333e6b00 RDI: 00005562a3991000
RBP: 00007f1b333e6aa0 R08: 0000000000000000 R09: 00007f1b333e6d80
R10: 0000000000000037 R11: 0000000000000206 R12: 00005562a3970000
R13: 0000000000000290 R14: 0000000000001000 R15: 0000000000000000
</TASK>
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2087884a90
RSP: 002b:00007ffe718808c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f2087975860 RCX: 00007f2087884a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f2087975860 R08: 0000000000000001 R09: eb9e03d0b6065ae7
R10: 00007ffe71880780 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f2087979658 R15: 0000000000000001
</TASK>
task:kworker/u8:3 state:R running task stack:32568 pid:11825 tgid:11825 ppid:3004 flags:0x00004000
Call Trace:
<TASK>
__switch_to_asm+0x70/0x70
</TASK>
task:modprobe state:R running task stack:24720 pid:11826 tgid:11826 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:11828 tgid:11828 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:kworker/u8:4 state:R running task stack:32568 pid:11832 tgid:11832 ppid:3551 flags:0x00004000
Call Trace:
<TASK>
__switch_to_asm+0x70/0x70
</TASK>
task:modprobe state:R running task stack:25424 pid:11834 tgid:11834 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:24720 pid:11836 tgid:11836 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25344 pid:11837 tgid:11837 ppid:3004 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f596b783a90
RSP: 002b:00007ffdaec1f738 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f596b874860 RCX: 00007f596b783a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f596b874860 R08: 0000000000000001 R09: d427ab9054769841
R10: 00007ffdaec1f5f0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f596b878658 R15: 0000000000000001
</TASK>
task:kworker/u8:3 state:R running task stack:28656 pid:11839 tgid:11839 ppid:3004 flags:0x00004000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6869
__cond_resched+0x1b/0x30 kernel/sched/core.c:7214
_cond_resched include/linux/sched.h:2031 [inline]
stop_one_cpu+0x112/0x190 kernel/stop_machine.c:151
</TASK>
task:modprobe state:R running task stack:25424 pid:11843 tgid:11843 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:kworker/u8:6 state:R running task stack:32568 pid:11845 tgid:11845 ppid:1106 flags:0x00004000
Call Trace:
<TASK>
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
task:modprobe state:R running task stack:24720 pid:11846 tgid:11846 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f62ec5faa90
RSP: 002b:00007ffc77d2c6e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f62ec6eb860 RCX: 00007f62ec5faa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f62ec6eb860 R08: 0000000000000001 R09: 73127a7182c281c0
R10: 00007ffc77d2c5a0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f62ec6ef658 R15: 0000000000000001
</TASK>
task:kworker/u8:4 state:R running task stack:32568 pid:11849 tgid:11849 ppid:3551 flags:0x00004000
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:11858 tgid:11858 ppid:2989 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
</TASK>
task:modprobe state:R running task stack:25136 pid:11860 tgid:11860 ppid:3551 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:11864 tgid:11864 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:24720 pid:11865 tgid:11865 ppid:2989 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe85a408a90
RSP: 002b:00007ffe6d728978 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fe85a4f9860 RCX: 00007fe85a408a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fe85a4f9860 R08: 0000000000000001 R09: 0d6f8889d938ef07
R10: 00007ffe6d728830 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe85a4fd658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24000 pid:11870 tgid:11870 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25136 pid:11874 tgid:11874 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9ab6225a90
RSP: 002b:00007ffd2d084458 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f9ab6316860 RCX: 00007f9ab6225a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f9ab6316860 R08: 0000000000000001 R09: 213f27e3772f6406
R10: 00007ffd2d084310 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f9ab631a658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24000 pid:11879 tgid:11879 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346
</TASK>
task:modprobe state:R running task stack:24416 pid:11882 tgid:11882 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd1e055da90
RSP: 002b:00007ffc2fdba8d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fd1e064e860 RCX: 00007fd1e055da90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fd1e064e860 R08: 0000000000000001 R09: 44bb0356e4044352
R10: 00007ffc2fdba790 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd1e0652658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11888 tgid:11888 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25136 pid:11890 tgid:11890 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed39e3ca90
RSP: 002b:00007ffcaabe57b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fed39f2d860 RCX: 00007fed39e3ca90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fed39f2d860 R08: 0000000000000001 R09: 751a872febfbe0c2
R10: 00007ffcaabe5670 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fed39f31658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11896 tgid:11896 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:11905 tgid:11905 ppid:3004 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:24720 pid:11908 tgid:11908 ppid:3004 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
</TASK>
task:modprobe state:R running task stack:24720 pid:11909 tgid:11909 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f91c01d1a90
RSP: 002b:00007fff59a721a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f91c02c2860 RCX: 00007f91c01d1a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f91c02c2860 R08: 0000000000000001 R09: 174dcf661f33f894
R10: 00007fff59a72060 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f91c02c6658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11915 tgid:11915 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:11918 tgid:11918 ppid:3551 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
</TASK>
task:modprobe state:R running task stack:25136 pid:11920 tgid:11920 ppid:3004 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f22572aea90
RSP: 002b:00007fff9570b928 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f225739f860 RCX: 00007f22572aea90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f225739f860 R08: 0000000000000001 R09: 1d598a15939cff95
R10: 00007fff9570b7e0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f22573a3658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24720 pid:11924 tgid:11924 ppid:3551 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25136 pid:11929 tgid:11929 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:11933 tgid:11933 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f0644958a90
RSP: 002b:00007fff8866c018 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f0644a49860 RCX: 00007f0644958a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f0644a49860 R08: 0000000000000001 R09: 6c69b7350d6b595d
R10: 00007fff8866bed0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f0644a4d658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11939 tgid:11939 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:11951 tgid:11951 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:24000 pid:11959 tgid:11959 ppid:3551 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:11963 tgid:11963 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f58d02e0a90
RSP: 002b:00007ffc6626d778 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f58d03d1860 RCX: 00007f58d02e0a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f58d03d1860 R08: 0000000000000001 R09: 7e2759f2076a714e
R10: 00007ffc6626d630 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f58d03d5658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11967 tgid:11967 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1d0649da90
RSP: 002b:00007ffd773ed488 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f1d0658e860 RCX: 00007f1d0649da90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f1d0658e860 R08: 0000000000000001 R09: dbfdc4bed4c4ff8f
R10: 00007ffd773ed340 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f1d06592658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24720 pid:11973 tgid:11973 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:11976 tgid:11976 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:24720 pid:11984 tgid:11984 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1385ec8a90
RSP: 002b:00007ffcf976a3e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f1385fb9860 RCX: 00007f1385ec8a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f1385fb9860 R08: 0000000000000001 R09: fd48b3f27557a6a1
R10: 00007ffcf976a2a0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f1385fbd658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:11990 tgid:11990 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25344 pid:12000 tgid:12000 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f622c1a5a90
RSP: 002b:00007ffc7eb2d618 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f622c296860 RCX: 00007f622c1a5a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f622c296860 R08: 0000000000000001 R09: fb6da14796518947
R10: 00007ffc7eb2d4d0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f622c29a658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25136 pid:12005 tgid:12005 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:12008 tgid:12008 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:12010 tgid:12010 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fd9cbf9aa90
RSP: 002b:00007ffddace9658 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fd9cc08b860 RCX: 00007fd9cbf9aa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fd9cc08b860 R08: 0000000000000001 R09: 742256a4a252f6b4
R10: 00007ffddace9510 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fd9cc08f658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24720 pid:12015 tgid:12015 ppid:2989 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346
</TASK>
task:modprobe state:R running task stack:25136 pid:12018 tgid:12018 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4008cfda90
RSP: 002b:00007fffd5753b88 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f4008dee860 RCX: 00007f4008cfda90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f4008dee860 R08: 0000000000000001 R09: 57a0791dac7bd80f
R10: 00007fffd5753a40 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f4008df2658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24416 pid:12023 tgid:12023 ppid:2989 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:12029 tgid:12029 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:24000 pid:12037 tgid:12037 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3539f25a90
RSP: 002b:00007ffdd9a78498 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f353a016860 RCX: 00007f3539f25a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f353a016860 R08: 0000000000000001 R09: 517fac0adb2b96eb
R10: 00007ffdd9a78350 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f353a01a658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:24720 pid:12042 tgid:12042 ppid:3004 flags:0x00000002
Call Trace:
<TASK>
prep_new_page mm/page_alloc.c:1545 [inline]
get_page_from_freelist+0xd5c/0x2630 mm/page_alloc.c:3457
</TASK>
task:modprobe state:R running task stack:25424 pid:12049 tgid:12049 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
</TASK>
task:modprobe state:R running task stack:25424 pid:12060 tgid:12060 ppid:2989 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f1c22cefa90
RSP: 002b:00007fff7a4ca7f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f1c22de0860 RCX: 00007f1c22cefa90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f1c22de0860 R08: 0000000000000001 R09: a9976d4a22f06c8e
R10: 00007fff7a4ca6b0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f1c22de4658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25136 pid:12065 tgid:12065 ppid:3551 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f40d09ada90
RSP: 002b:00007ffe44700508 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007f40d0a9e860 RCX: 00007f40d09ada90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007f40d0a9e860 R08: 0000000000000001 R09: f1aa9b16a9cef104
R10: 00007ffe447003c0 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f40d0aa2658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:12070 tgid:12070 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:24720 pid:12076 tgid:12076 ppid:1106 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
__pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346
</TASK>
task:modprobe state:R running task stack:25424 pid:12079 tgid:12079 ppid:1106 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:12084 tgid:12084 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
prepare_lock_switch kernel/sched/core.c:5066 [inline]
context_switch kernel/sched/core.c:5325 [inline]
__schedule+0x102c/0x34b0 kernel/sched/core.c:6690
__pfx_lock_release+0x10/0x10 kernel/locking/lockdep.c:5346
</TASK>
task:modprobe state:R running task stack:25424 pid:12087 tgid:12087 ppid:2989 flags:0x00000002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
do_task_dead+0xd6/0x110 kernel/sched/core.c:6706
do_exit+0x1de7/0x2ce0 kernel/exit.c:990
do_group_exit+0xd3/0x2a0 kernel/exit.c:1088
__do_sys_exit_group kernel/exit.c:1099 [inline]
__se_sys_exit_group kernel/exit.c:1097 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1097
x64_sys_call+0x14a9/0x16a0 arch/x86/include/generated/asm/syscalls_64.h:232
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fedf6344a90
RSP: 002b:00007ffdd18ea6b8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fedf6435860 RCX: 00007fedf6344a90
RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001
RBP: 00007fedf6435860 R08: 0000000000000001 R09: e0e65f21ab61f0e5
R10: 00007ffdd18ea570 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fedf6439658 R15: 0000000000000001
</TASK>
task:modprobe state:R running task stack:25424 pid:12092 tgid:12092 ppid:3551 flags:0x00000000
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5328 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6690
</TASK>
task:modprobe state:R running task stack:25424 pid:12098 tgid:12098 ppid:2989 flags:0x00000002
Call Trace:
<TASK>


---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at [email protected].

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https://goo.gl/tpsmEJ#status for how to communicate with syzbot.

If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title

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If you attach or paste a git patch, syzbot will apply it before testing.

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#syz undup

Not really sure what to do with these, they're all non-repro, all seem to
be stalled on some USB issue, all have CONFIG_DEBUG_VM_MAPLE_TREE which
causes _way_ more work to be done so increase the chances of a stall and
nobody seems to want to own this...

I would _strongly_ suggest that if you are doing potentially high-latency
USB testing CONFIG_DEBUG_VM_MAPLE_TREE is a bad thing to have enabled, as
this will _massively_ increase the chances of these stalls. It's a very
very heavy operation.

It's good to have in ordinary testing, but for known high-latency
hardware-related testing not so much.

It seems always to get stuck in mas_next_slot() on mm side.

Anyway...

Let's re-run this against the latest pending fix tree in mm to see what happens.

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-hotfixes-unstable

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-by: [email protected]
Tested-by: [email protected]

Tested on:

commit: cffcc47b mm/mlock: set the correct prev on failure
git tree: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-hotfixes-unstable
console output: https://syzkaller.appspot.com/x/log.txt?x=1304a630580000
kernel config: https://syzkaller.appspot.com/x/.config?x=6648774f7c39d413
Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.

+Alan re: USB stalls
OK this seems likely to be intermittant (and unrelated to what's in
mm-unstable-fixes honestly) and does make me wonder if the fix referenced
in [0] really has sorted things out? Or whether it has perhaps help
mitigate the issue but not sufficiently in conjunction with debug things
that slow things down.

Because we keep getting these reports, that mysteriously don't occur if we
re-run (or hit other code paths), they seem to hit somewhat arbitrary parts
of mm, and because CONFIG_DEBUG_VM_MAPLE_TREE is set we spend a _long_ time
in mm validating trees (this config option is REALLY REALLY heavy-handed).

I note we also set CONFIG_KCOV and CONFIG_KCOV_INSTRUMENT_ALL which isn't
going to make anything quicker if the USB gets laggy.

I'm not sure if there's a human who can help tweak the config for these
hardware-centric tests at Google? At least tweaking the RCU stall time
anyway?

In any case this continues not to look likely to be an actual mm issue as
far as I can see.

In [0] we were stalled in a validate call which would align with the idea
that perhaps we were just dealing with a very very big tree and getting
slow down that way.

Cheers, Lorenzo

[0]:https://lore.kernel.org/all/[email protected]/

This looks very different from the issues that were addressed by the fix
I mentioned in [0]. In particular, the log traces for this series of
bug reports all start with something like this:

serial_out drivers/tty/serial/8250/8250.h:142 [inline]
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3322 [inline]
serial8250_console_write+0xf9e/0x17c0 drivers/tty/serial/8250/8250_port.c:3393
indicating that perhaps the problem is related to the 8250 driver. Or
perhaps that driver just happens to wait for long periods and so is more
likely to show up when the real problem occurs.

By contrast, the log traces for the [0] bug reports all show something
like this:

context_switch kernel/sched/core.c:5315 [inline]
__schedule+0x105f/0x34b0 kernel/sched/core.c:6675
__schedule_loop kernel/sched/core.c:6752 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6767
usb_kill_urb.part.0+0x1ca/0x250 drivers/usb/core/urb.c:713
usb_kill_urb+0x83/0xa0 drivers/usb/core/urb.c:702
usb_start_wait_urb+0x255/0x4c0 drivers/usb/core/message.c:65
usb_internal_control_msg drivers/usb/core/message.c:103 [inline]
usb_control_msg+0x327/0x4b0 drivers/usb/core/message.c:154

because that bug involved usb_kill_urb() waiting indefinitely for an
event that never happens.

Alan Stern

> [0]:https://lore.kernel.org/all/[email protected]/

Hi Lorenzo,
These are necessary for coverage-guided fuzzing. Though when we find
and run reproducers, we don't actually set up /dev/kcov, so I guess
the impact of coverage callbacks here is not that significant here.
CONFIG_KASAN is likely slowing down things much more.
We currently set:

CONFIG_RCU_CPU_STALL_TIMEOUT=100
CONFIG_RCU_EXP_CPU_STALL_TIMEOUT=21000

The expedited RCU timeout was limited to 21 seconds up to some time
ago, but I guess now we can safely increase this number as well. I'll
send a PR with syzbot config updates.

--
Aleksandr

+cc Greg, Jiri in case serial8250 really is an issue here.

For context, the original syzbot report is at [1] that gets snipped here.

[1]:https://lore.kernel.org/all/[email protected]/
Yeah, see below, I think the waiting is probably the issue to be honest.

It's hard to know if this backtrace just happened to be code executing at
the time of the stall or is actually related. Have cc'd serial8250 people
in any case.
Ah thanks, sorry am pattern-matching a bit here on usb-related things.

I suspect issue here is the test is on some level assuming that it can have
delays or hold ups that would normally be ok in a non-debug kernel, but not
taking into account the fact that CONFIG_DEBUG_VM_MAPLE_TREE can really,
really slow things down and is a very heavy-handed option.

I think we should nearly always turn it on as it correctly identifies
serious issues, however in cases where we _expect_ slowdown or some
significant waiting relating to hardware or simulated hardware actions we
might want to reconsider that or at least increase timeouts.

Liam has submitted a patch to explicitly rule out an infinite loop in the
maple tree as a source of any stall [2] though there is absolutely no
reason why this should happen other than in the face of overwhelming memory
corruption.

Still suspect these are just due to slow down.

Perhaps somebody from the syzkaller side can look into mitigation?

[2]:https://lore.kernel.org/all/[email protected]

Ah thanks, just sent a reply immediately prior to receiving this :)

Maybe worth setting CONFIG_RCU_EXP_CPU_STALL_TIMEOUT to 0 so it matches the CPU
stall timeout? At least for builds that also set heavy debug options like
CONFIG_DEBUG_VM_MAPLE_TREE?

Cheers, Lorenzo

Oh, that's even simpler than I thought it would be, thank you!
I've sent https://github.com/google/syzkaller/pull/5455, it will come
into effect in a few days.

--
Aleksandr

Perfect, thanks very much!