Hello, syzbot found the following issue on: HEAD commit: 64f3b5a6bc49 Merge 6.12-rc3 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=11d7d85f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=9878fe11046ea2c6 dashboard link: https://syzkaller.appspot.com/bug?extid=23e14ec82f3c8692eaa9 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=11db9440580000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/03a93e9d384d/disk-64f3b5a6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/966f6ee7b5f9/vmlinux-64f3b5a6.xz kernel image: https://storage.googleapis.com/syzbot-assets/bebec9f43b90/bzImage-64f3b5a6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+23e14ec82f3c8692eaa9@xxxxxxxxxxxxxxxxxxxxxxxxx rcu: INFO: rcu_preempt detected expedited stalls on CPUs/tasks: { 1-...D } 2655 jiffies s: 1461 root: 0x2/. rcu: blocking rcu_node structures (internal RCU debug): Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 10005 Comm: udevd Not tainted 6.12.0-rc3-syzkaller-00029-g64f3b5a6bc49 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 RIP: 0010:check_kcov_mode kernel/kcov.c:183 [inline] RIP: 0010:write_comp_data+0x38/0x90 kernel/kcov.c:246 Code: e4 ad 7e 65 8b 05 50 e4 ad 7e a9 00 01 ff 00 74 1d f6 c4 01 74 67 a9 00 00 0f 00 75 60 a9 00 00 f0 00 75 59 8b 82 54 15 00 00 <85> c0 74 4f 8b 82 30 15 00 00 83 f8 03 75 44 48 8b 82 38 15 00 00 RSP: 0018:ffffc900001b7c70 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000008 RCX: ffffffff86e67f92 RDX: ffff888118e9ba80 RSI: 0000000000000073 RDI: 0000000000000001 RBP: ffffffff8810b7c0 R08: 0000000000000001 R09: 0000000000000073 R10: 0000000000000075 R11: 0000000000098390 R12: 0000000000000075 R13: 0000000000000001 R14: 000000000000000a R15: 0000000000000005 FS: 00007fce4e490c80(0000) GS:ffff8881f5900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f32443d38e5 CR3: 0000000118582000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <NMI> </NMI> <IRQ> __sanitizer_cov_trace_switch+0x54/0x90 kernel/kcov.c:351 format_decode+0x472/0xba0 lib/vsprintf.c:2613 vsnprintf+0x13d/0x1880 lib/vsprintf.c:2755 sprintf+0xcd/0x110 lib/vsprintf.c:3007 print_time kernel/printk/printk.c:1362 [inline] info_print_prefix+0x25c/0x350 kernel/printk/printk.c:1388 record_print_text+0x141/0x400 kernel/printk/printk.c:1437 printk_get_next_message+0x2a6/0x670 kernel/printk/printk.c:2978 console_emit_next_record kernel/printk/printk.c:3046 [inline] console_flush_all+0x6ec/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+0x1b7/0x3d0 arch/x86/kernel/dumpstack.c:285 sched_show_task kernel/sched/core.c:7589 [inline] sched_show_task+0x3f0/0x5f0 kernel/sched/core.c:7564 show_state_filter+0xee/0x320 kernel/sched/core.c:7634 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+0x17c3/0x38d0 drivers/usb/gadget/udc/dummy_hcd.c:1988 __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:1037 [inline] sysvec_apic_timer_interrupt+0x90/0xb0 arch/x86/kernel/apic/apic.c:1037 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:lock_acquire.part.0+0x155/0x380 kernel/locking/lockdep.c:5790 Code: b8 ff ff ff ff 65 0f c1 05 30 32 cf 7e 83 f8 01 0f 85 d0 01 00 00 9c 58 f6 c4 02 0f 85 e5 01 00 00 48 85 ed 0f 85 b6 01 00 00 <48> b8 00 00 00 00 00 fc ff df 48 01 c3 48 c7 03 00 00 00 00 48 c7 RSP: 0018:ffffc9000380f9a0 EFLAGS: 00000206 RAX: 0000000000000046 RBX: 1ffff92000701f35 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff8727f4c0 RDI: ffffffff8746ea80 RBP: 0000000000000200 R08: 0000000000000000 R09: fffffbfff1f55db5 R10: ffffffff8faaedaf R11: 0000000000000000 R12: 0000000000000000 R13: ffff888100abc1e0 R14: 0000000000000000 R15: 0000000000000000 down_read+0x9a/0x330 kernel/locking/rwsem.c:1524 kernfs_iop_permission+0xba/0x120 fs/kernfs/inode.c:287 do_inode_permission fs/namei.c:468 [inline] inode_permission fs/namei.c:535 [inline] inode_permission+0x388/0x5f0 fs/namei.c:510 may_lookup fs/namei.c:1760 [inline] link_path_walk.part.0.constprop.0+0x1d7/0xd40 fs/namei.c:2366 link_path_walk fs/namei.c:2349 [inline] path_lookupat+0x93/0x770 fs/namei.c:2579 filename_lookup+0x1e5/0x5b0 fs/namei.c:2609 do_readlinkat+0xcf/0x390 fs/stat.c:537 __do_sys_readlink fs/stat.c:574 [inline] __se_sys_readlink fs/stat.c:571 [inline] __x64_sys_readlink+0x78/0xc0 fs/stat.c:571 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: 0033:0x7fce4e5bcd47 Code: 73 01 c3 48 8b 0d e1 90 0d 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 59 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d b1 90 0d 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd38dc15b8 EFLAGS: 00000202 ORIG_RAX: 0000000000000059 RAX: ffffffffffffffda RBX: 0000559cfe1909b0 RCX: 00007fce4e5bcd47 RDX: 0000000000000400 RSI: 00007ffd38dc19c8 RDI: 00007ffd38dc15c8 RBP: 00007ffd38dc1e08 R08: 0000559cd91101fd R09: 0000000000000000 R10: 0000000000000010 R11: 0000000000000202 R12: 0000000000000200 R13: 00007ffd38dc19c8 R14: 00007ffd38dc15c8 R15: 0000559cd910aa04 </TASK> </TASK> task:kworker/u8:5 state:R running task stack:32568 pid:11335 tgid:11335 ppid:265 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25408 pid:11369 tgid:11369 ppid:46 flags:0x00000000 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25408 pid:11372 tgid:11372 ppid:46 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 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: 0033:0x7efe67ab9a90 RSP: 002b:00007fffd34967f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007efe67baa860 RCX: 00007efe67ab9a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007efe67baa860 R08: 0000000000000001 R09: ea806687bba3ba73 R10: 00007fffd34966b0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007efe67bae658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:24416 pid:11376 tgid:11376 ppid:294 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25136 pid:11381 tgid:11381 ppid:46 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25408 pid:11387 tgid:11387 ppid:46 flags:0x00004002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 do_task_dead+0xd6/0x110 kernel/sched/core.c:6698 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: 0033:0x7f6ba9925a90 RSP: 002b:00007fffc0294348 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f6ba9a16860 RCX: 00007f6ba9925a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007f6ba9a16860 R08: 0000000000000001 R09: 1b9cdc5427f5519a R10: 00007fffc0294200 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f6ba9a1a658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:25408 pid:11393 tgid:11393 ppid:1126 flags:0x00000002 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25408 pid:11396 tgid:11396 ppid:1126 flags:0x00000000 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:24704 pid:11405 tgid:11405 ppid:294 flags:0x00000000 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25136 pid:11415 tgid:11415 ppid:265 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:3 state:R running task stack:32568 pid:11423 tgid:11423 ppid:46 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25408 pid:11426 tgid:11426 ppid:265 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25408 pid:11429 tgid:11429 ppid:265 flags:0x00000002 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:24416 pid:11444 tgid:11444 ppid:294 flags:0x00000002 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:23984 pid:11453 tgid:11453 ppid:46 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:5 state:R running task stack:32568 pid:11459 tgid:11459 ppid:265 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:24704 pid:11464 tgid:11464 ppid:46 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:8 state:R running task stack:32568 pid:11468 tgid:11468 ppid:1126 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25408 pid:11471 tgid:11471 ppid:46 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:23984 pid:11475 tgid:11475 ppid:294 flags:0x00000002 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25408 pid:11484 tgid:11484 ppid:46 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25408 pid:11497 tgid:11497 ppid:1126 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 do_task_dead+0xd6/0x110 kernel/sched/core.c:6698 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: 0033:0x7f47f3e45a90 RSP: 002b:00007ffeb8060278 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f47f3f36860 RCX: 00007f47f3e45a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007f47f3f36860 R08: 0000000000000001 R09: 351fa3daeee7c7f1 R10: 00007ffeb8060130 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f47f3f3a658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:24704 pid:11504 tgid:11504 ppid:1126 flags:0x00000002 Call Trace: <TASK> </TASK> task:kworker/u8:5 state:R running task stack:32568 pid:11507 tgid:11507 ppid:265 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25136 pid:11509 tgid:11509 ppid:294 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 do_task_dead+0xd6/0x110 kernel/sched/core.c:6698 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: 0033:0x7f9d1230fa90 RSP: 002b:00007ffca91563f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f9d12400860 RCX: 00007f9d1230fa90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007f9d12400860 R08: 0000000000000001 R09: afd0c8902c591a26 R10: 00007ffca91562b0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f9d12404658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:23984 pid:11515 tgid:11515 ppid:46 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25408 pid:11522 tgid:11522 ppid:46 flags:0x00000000 Call Trace: <TASK> </TASK> task:kworker/u8:8 state:R running task stack:32568 pid:11528 tgid:11528 ppid:1126 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:24704 pid:11532 tgid:11532 ppid:294 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6861 </TASK> task:kworker/u8:6 state:R running task stack:32568 pid:11535 tgid:11535 ppid:294 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25408 pid:11539 tgid:11539 ppid:1126 flags:0x00000000 Call Trace: <TASK> __pfx_user_statfs+0x10/0x10 fs/statfs.c:405 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: 0033:0x7f06eac40a90 RSP: 002b:00007ffdaafa1a48 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f06ead31860 RCX: 00007f06eac40a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007f06ead31860 R08: 0000000000000001 R09: 92b5fa4b7167cbe8 R10: 00007ffdaafa1900 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f06ead35658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:25408 pid:11545 tgid:11545 ppid:28 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:1 state:R running task stack:28784 pid:11550 tgid:11550 ppid:28 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6861 __cond_resched+0x1b/0x30 kernel/sched/core.c:7199 _cond_resched include/linux/sched.h:2031 [inline] stop_one_cpu+0x112/0x190 kernel/stop_machine.c:151 </TASK> task:kworker/u8:3 state:R running task stack:28784 pid:11558 tgid:11558 ppid:46 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:modprobe state:R running task stack:25408 pid:11562 tgid:11562 ppid:294 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 do_task_dead+0xd6/0x110 kernel/sched/core.c:6698 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: 0033:0x7f23d35eda90 RSP: 002b:00007ffe53b79838 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007f23d36de860 RCX: 00007f23d35eda90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007f23d36de860 R08: 0000000000000001 R09: 5c9f6e761b5f2ecc R10: 00007ffe53b796f0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f23d36e2658 R15: 0000000000000001 </TASK> task:kworker/u8:1 state:R running task stack:32568 pid:11563 tgid:11563 ppid:28 flags:0x00004000 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25408 pid:11572 tgid:11572 ppid:1126 flags:0x00000002 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:24416 pid:11581 tgid:11581 ppid:46 flags:0x00000002 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 do_task_dead+0xd6/0x110 kernel/sched/core.c:6698 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: 0033:0x7ff38e917a90 RSP: 002b:00007ffcccd34238 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00007ff38ea08860 RCX: 00007ff38e917a90 RDX: 00000000000000e7 RSI: 000000000000003c RDI: 0000000000000001 RBP: 00007ff38ea08860 R08: 0000000000000001 R09: cfa29951be980679 R10: 00007ffcccd340f0 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007ff38ea0c658 R15: 0000000000000001 </TASK> task:modprobe state:R running task stack:25408 pid:11583 tgid:11583 ppid:294 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:8 state:R running task stack:32568 pid:11597 tgid:11597 ppid:1126 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:23984 pid:11599 tgid:11599 ppid:294 flags:0x00000000 Call Trace: <TASK> </TASK> task:kworker/u8:6 state:R running task stack:32568 pid:11606 tgid:11606 ppid:294 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:25408 pid:11609 tgid:11609 ppid:46 flags:0x00000002 Call Trace: <TASK> deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline] unwind_next_frame+0xadb/0x20c0 arch/x86/kernel/unwind_orc.c:585 </TASK> task:modprobe state:R running task stack:25408 pid:11614 tgid:11614 ppid:1126 flags:0x00000000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6861 __cond_resched+0x1b/0x30 kernel/sched/core.c:7199 _cond_resched include/linux/sched.h:2031 [inline] zap_pmd_range mm/memory.c:1742 [inline] zap_pud_range mm/memory.c:1768 [inline] zap_p4d_range mm/memory.c:1789 [inline] unmap_page_range+0x4b8/0x2fa0 mm/memory.c:1810 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228 lookup_chain_cache_add kernel/locking/lockdep.c:3816 [inline] validate_chain kernel/locking/lockdep.c:3872 [inline] __lock_acquire+0x163e/0x3ce0 kernel/locking/lockdep.c:5202 </TASK> task:kworker/u8:1 state:R running task stack:32568 pid:11624 tgid:11624 ppid:28 flags:0x00004000 Call Trace: <TASK> </TASK> task:modprobe state:R running task stack:25408 pid:11629 tgid:11629 ppid:1126 flags:0x00000002 Call Trace: <TASK> </TASK> task:kworker/u8:5 state:R running task stack:32568 pid:11631 tgid:11631 ppid:265 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5322 [inline] __schedule+0x105f/0x34b0 kernel/sched/core.c:6682 </TASK> task:kworker/u8:5 state:R running task stack:32568 pid:11645 tgid:11645 ppid:265 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:kworker/u8:8 state:R running task stack:32568 pid:11646 tgid:11646 ppid:1126 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:kworker/u8:6 state:R running task stack:32568 pid:11647 tgid:11647 ppid:294 flags:0x00004000 Call Trace: <TASK> __switch_to_asm+0x70/0x70 </TASK> task:modprobe state:R running task stack:27808 pid:11655 tgid:11655 ppid:46 flags:0x00004000 Call Trace: <TASK> </TASK> Showing all locks held in the system: 2 locks held by kworker/u8:1/28: 2 locks held by kworker/u8:3/46: #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90000517d80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by kworker/u8:5/265: #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001a0fd80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by kworker/u8:6/294: #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001affd80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by kworker/0:1H/295: #0: ffff8881026e7d48 ((wq_completion)kblockd){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc90001b5fd80 ((work_completion)(&q->timeout_work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by kworker/u8:8/1126: #0: ffff888100089148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x129b/0x1ba0 kernel/workqueue.c:3204 #1: ffffc900026ffd80 ((work_completion)(&sub_info->work)){+.+.}-{0:0}, at: process_one_work+0x921/0x1ba0 kernel/workqueue.c:3205 2 locks held by getty/2608: #0: ffff8881146590a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900000432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 6 locks held by kworker/1:2/2640: 3 locks held by syz-executor/2658: #0: ffff888113d2f4a8 (&vma->vm_lock->lock){++++}-{3:3}, at: vma_start_read include/linux/mm.h:704 [inline] #0: ffff888113d2f4a8 (&vma->vm_lock->lock){++++}-{3:3}, at: lock_vma_under_rcu+0x13e/0x980 mm/memory.c:6228 #1: ffff8881146ce4f0 (sb_pagefaults){.+.+}-{0:0}, at: do_page_mkwrite+0x177/0x380 mm/memory.c:3162 #2: ffff8881146da958 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xf6c/0x1430 fs/jbd2/transaction.c:448 5 locks held by udevd/10005: #0: ffff888100abc1e0 (&root->kernfs_iattr_rwsem){++++}-{3:3}, at: kernfs_iop_permission+0xba/0x120 fs/kernfs/inode.c:287 #1: ffff88811beb9230 (&dev->event_lock){..-.}-{2:2}, at: input_event drivers/input/input.c:397 [inline] #1: ffff88811beb9230 (&dev->event_lock){..-.}-{2:2}, at: input_event+0x70/0xa0 drivers/input/input.c:390 #2: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #2: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: input_pass_values+0x8b/0x8e0 drivers/input/input.c:118 #3: ffffffff893879d8 (kbd_event_lock){..-.}-{2:2}, at: spin_lock include/linux/spinlock.h:351 [inline] #3: ffffffff893879d8 (kbd_event_lock){..-.}-{2:2}, at: kbd_event+0x8a/0x17a0 drivers/tty/vt/keyboard.c:1535 #4: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #4: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #4: ffffffff88ebb100 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 1 lock held by udevd/10091: #0: ffffffff88ec69f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x282/0x3b0 kernel/rcu/tree_exp.h:297 1 lock held by syz.1.30/10112: #0: ffffffff88ec69f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock+0x1a4/0x3b0 kernel/rcu/tree_exp.h:329 1 lock held by modprobe/11671: ============================================= --- 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 syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: 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 If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
