UBIFS error (pid: 17496): cannot open "(null)", error -22 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. watchdog: BUG: soft lockup - CPU#1 stuck for 22s! [syz-executor.3:17505] Modules linked in: irq event stamp: 2553041 hardirqs last enabled at (2553040): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2553041): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (1086): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (1503): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (1503): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 1 PID: 17505 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:__save_stack_trace+0x96/0x190 arch/x86/kernel/stacktrace.c:44 Code: 80 e8 0e a5 06 00 8b 55 80 85 d2 75 2d eb 62 41 8b 04 24 41 3b 44 24 04 73 76 49 8b 54 24 08 8d 48 01 41 89 0c 24 48 89 1c c2 <48> 8d 7d 80 e8 e1 90 06 00 8b 45 80 85 c0 74 37 48 8d 7d 80 e8 71 RSP: 0018:ffff8880ba1078b8 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000006 RBX: ffffffff81539113 RCX: 0000000000000007 RDX: ffff8880ba107978 RSI: ffff8880ba107728 RDI: ffffffff81539113 RBP: ffff8880ba107948 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba107927 R11: 0000000000074071 R12: ffff8880ba107960 R13: 0000000000000000 R14: ffff8880b5b96900 R15: 00000000000000e8 FS: 00007fb767619700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb7674f0718 CR3: 000000009ae9e000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:553 slab_post_alloc_hook mm/slab.h:445 [inline] slab_alloc_node mm/slab.c:3340 [inline] kmem_cache_alloc_node+0x133/0x3b0 mm/slab.c:3647 __alloc_skb+0x71/0x560 net/core/skbuff.c:193 __netdev_alloc_skb+0x76/0x460 net/core/skbuff.c:407 netdev_alloc_skb include/linux/skbuff.h:2680 [inline] dev_alloc_skb include/linux/skbuff.h:2693 [inline] send_hsr_supervision_frame+0x107/0xf70 net/hsr/hsr_device.c:265 hsr_announce+0x125/0x3a0 net/hsr/hsr_device.c:350 call_timer_fn+0x177/0x700 kernel/time/timer.c:1338 expire_timers+0x243/0x4e0 kernel/time/timer.c:1375 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:check_kcov_mode kernel/kcov.c:69 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x1c/0x50 kernel/kcov.c:101 Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 48 8b 34 24 65 48 8b 04 25 c0 df 01 00 65 8b 15 cc 59 9f 7e 81 e2 00 01 1f 00 75 2b <8b> 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 RSP: 0018:ffff888042947e78 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff888099ff6400 RBX: 000000000000005d RCX: ffffffff81ab2829 RDX: 0000000000000000 RSI: ffffffff81ab27c0 RDI: 0000000000000005 RBP: ffff8880a52614e3 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000005 R11: 00000000edfb48c6 R12: 0000000020000200 R13: 0000000020001240 R14: 0000000000001000 R15: 0000000000000000 exact_copy_from_user fs/namespace.c:2685 [inline] copy_mount_options+0x190/0x380 fs/namespace.c:2714 ksys_mount+0x9b/0x130 fs/namespace.c:3033 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb768cc5279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb767619168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb768dd8050 RCX: 00007fb768cc5279 RDX: 00000000200000c0 RSI: 0000000020000200 RDI: 0000000000000000 RBP: 00007fb768d1f189 R08: 0000000020000240 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce6a391af R14: 00007fb767619300 R15: 0000000000022000 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 17496 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:__sanitizer_cov_trace_pc+0x47/0x50 kernel/kcov.c:111 Code: 90 60 13 00 00 83 fa 02 75 20 48 8b 88 68 13 00 00 8b 80 64 13 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 48 89 11 0f 1f 84 00 00 00 00 00 49 89 f1 49 89 fa 65 48 8b 34 25 c0 df RSP: 0018:ffff8880ba007be0 EFLAGS: 00000006 RAX: ffff888062f5c200 RBX: 0000000000000000 RCX: ffffffff8156f7e6 RDX: 0000000000010100 RSI: ffffffff8156f7f5 RDI: 0000000000000005 RBP: ffff8880ba01e2c0 R08: 0000000000000000 R09: 0000000000000001 R10: 0000000000000005 R11: ffffffff8c66501b R12: 00000219285c8a91 R13: 0000000000000003 R14: ffff8880ba024cc0 R15: ffff8880ba024d30 FS: 00007fb76763a700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 000000009ae9e000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: clockevents_program_event+0x95/0x350 kernel/time/clockevents.c:329 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:48 hrtimer_interrupt+0x40a/0x9e0 kernel/time/hrtimer.c:1598 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192 Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d RSP: 0018:ffff8880ba007de0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff1100c5eb95a RDX: dffffc0000000000 RSI: ffff888062f5cab0 RDI: ffff888062f5ca84 RBP: ffff8880ba022b40 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff869a4ab0 R13: ffff8880ba022b40 R14: ffff8880ba007e78 R15: 0000000000000000 expire_timers+0x238/0x4e0 kernel/time/timer.c:1374 __run_timers kernel/time/timer.c:1696 [inline] run_timer_softirq+0x21c/0x670 kernel/time/timer.c:1709 __do_softirq+0x265/0x980 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x215/0x260 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1098 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:console_unlock+0xe7b/0x1110 kernel/printk/printk.c:2468 Code: ff df 48 c1 e8 03 80 3c 08 00 0f 85 66 02 00 00 48 83 3d cf c3 a3 08 00 0f 84 9e 00 00 00 e8 ac c6 14 00 48 8b 7c 24 30 57 9d <0f> 1f 44 00 00 e9 9b fc ff ff e8 96 c6 14 00 0f 0b e8 8f c6 14 00 RSP: 0018:ffff888062f67918 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff888062f5c200 RBX: 0000000000000200 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: ffffffff814dbec4 RDI: 0000000000000293 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff8446efa0 R13: 0000000000000073 R14: 0000000000000000 R15: ffffffff8a6dd090 vprintk_emit+0x2d1/0x740 kernel/printk/printk.c:1965 vprintk_func+0x79/0x180 kernel/printk/printk_safe.c:405 printk+0xba/0xed kernel/printk/printk.c:2040 ovl_lower_dir fs/overlayfs/super.c:814 [inline] ovl_get_lowerstack fs/overlayfs/super.c:1429 [inline] ovl_fill_super.cold+0xf3/0x828 fs/overlayfs/super.c:1612 mount_nodev+0x60/0x110 fs/super.c:1204 mount_fs+0xa3/0x310 fs/super.c:1261 vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961 vfs_kern_mount fs/namespace.c:951 [inline] do_new_mount fs/namespace.c:2492 [inline] do_mount+0x115c/0x2f50 fs/namespace.c:2822 ksys_mount+0xcf/0x130 fs/namespace.c:3038 __do_sys_mount fs/namespace.c:3052 [inline] __se_sys_mount fs/namespace.c:3049 [inline] __x64_sys_mount+0xba/0x150 fs/namespace.c:3049 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb768cc5279 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb76763a168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007fb768dd7f80 RCX: 00007fb768cc5279 RDX: 0000000020000080 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00007fb768d1f189 R08: 0000000020000340 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffce6a391af R14: 00007fb76763a300 R15: 0000000000022000