squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop0 squashfs: SQUASHFS error: Can't find a SQUASHFS superblock on loop1 watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [syz-executor.4:14349] Modules linked in: irq event stamp: 2710117 hardirqs last enabled at (2710116): [] trace_hardirqs_on_thunk+0x1a/0x1c hardirqs last disabled at (2710117): [] trace_hardirqs_off_thunk+0x1a/0x1c softirqs last enabled at (2703732): [] __do_softirq+0x678/0x980 kernel/softirq.c:318 softirqs last disabled at (2703735): [] invoke_softirq kernel/softirq.c:372 [inline] softirqs last disabled at (2703735): [] irq_exit+0x215/0x260 kernel/softirq.c:412 CPU: 0 PID: 14349 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__kernel_text_address+0x1/0x30 kernel/extable.c:106 Code: 89 ef e8 42 f3 2d 00 0f b6 c0 eb cf 48 c7 c7 44 aa 26 8b e8 61 44 59 00 e9 64 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 53 <48> 89 fb e8 07 ff ff ff 85 c0 75 17 48 81 fb 00 80 37 8c 72 0c 31 RSP: 0018:ffff8880ba007398 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff8880ba0073d0 RCX: 0000000000000000 RDX: 1ffff11017400e83 RSI: ffff8880ba007230 RDI: ffffffff866e71ef RBP: ffff8880ba007418 R08: 0000000000000001 R09: 0000000000000001 R10: ffff8880ba00742f R11: 0000000000074071 R12: ffff8880ba007468 R13: 0000000000000000 R14: ffff8880b5b8fd80 R15: 00000000000000e8 FS: 00007f1ec59c3700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1ec854d000 CR3: 00000000938f2000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292 __save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45 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 alloc_skb include/linux/skbuff.h:995 [inline] sctp_packet_transmit+0x246/0x3660 net/sctp/output.c:584 sctp_outq_flush_transports+0x19d/0x340 net/sctp/outqueue.c:1166 sctp_outq_flush net/sctp/outqueue.c:1214 [inline] sctp_outq_uncork+0x185/0x200 net/sctp/outqueue.c:777 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1815 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1199 [inline] sctp_do_sm+0x72a/0x5110 net/sctp/sm_sideeffect.c:1170 sctp_generate_heartbeat_event+0x2af/0x490 net/sctp/sm_sideeffect.c:406 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:__orc_find+0x9b/0xf0 arch/x86/kernel/unwind_orc.c:55 Code: d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 48 48 63 03 48 01 d8 48 39 c1 73 b0 4c 8d 63 fc 49 39 ec 73 b3 4d 29 ee 49 c1 fe 02 <4b> 8d 04 76 48 8d 04 46 48 83 c4 10 5b 5d 41 5c 41 5d 41 5e 41 5f RSP: 0018:ffff888064aff898 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: ffffffff866de42f RBX: ffffffff8b75eaec RCX: ffffffff866de4fe RDX: 0000000000000000 RSI: ffffffff8bf53c92 RDI: ffffffff8b75eac0 RBP: ffffffff8b75eaf0 R08: 0000000000000000 R09: ffffffff8bf53c92 R10: ffff888064affa6f R11: 0000000000074071 R12: ffffffff8b75eaec R13: ffffffff8b75eac0 R14: 000000000000000b R15: dffffc0000000000 orc_find arch/x86/kernel/unwind_orc.c:159 [inline] unwind_next_frame+0x339/0x1400 arch/x86/kernel/unwind_orc.c:422 __save_stack_trace+0x9f/0x190 arch/x86/kernel/stacktrace.c:44 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 kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 sk_prot_alloc+0x5f/0x2d0 net/core/sock.c:1477 sk_alloc+0x36/0xec0 net/core/sock.c:1537 inet6_create net/ipv6/af_inet6.c:183 [inline] inet6_create+0x35b/0xf70 net/ipv6/af_inet6.c:110 __sock_create+0x3d8/0x740 net/socket.c:1365 sock_create net/socket.c:1416 [inline] __sys_socket+0xef/0x200 net/socket.c:1458 __do_sys_socket net/socket.c:1467 [inline] __se_sys_socket net/socket.c:1465 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1465 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f1ec844da39 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1ec59c3188 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 00007f1ec8550f60 RCX: 00007f1ec844da39 RDX: 8010000000000084 RSI: 0000000000000001 RDI: 000000000000000a RBP: 00007f1ec84a7c5f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff45d884df R14: 00007f1ec59c3300 R15: 0000000000022000 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 14330 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__read_once_size include/linux/compiler.h:263 [inline] RIP: 0010:trace_local_timer_exit arch/x86/include/asm/trace/irq_vectors.h:56 [inline] RIP: 0010:smp_apic_timer_interrupt+0x319/0x550 arch/x86/kernel/apic/apic.c:1097 Code: e8 de fb df f8 e9 18 fe ff ff 65 ff 05 f0 9d e1 77 48 c7 c0 88 cc 0e 8b 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 <0f> 85 fb 01 00 00 48 8b 05 02 8b ee 02 e8 65 5c 30 f9 85 c0 74 0d RSP: 0018:ffff8880ba107ae8 EFLAGS: 00000046 RAX: 1ffffffff161d991 RBX: ffff8880ba11e2c0 RCX: ffffffff815447a5 RDX: dffffc0000000000 RSI: ffffffff88203f6c RDI: 0000000000000005 RBP: 0000000000000000 R08: ffffffff8c665058 R09: 0000000000000000 R10: 0000000000000005 R11: ffffffff8c66505b R12: ffff88808bc9f558 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fb856adb700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb856adc000 CR3: 00000000a3e80000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894 RIP: 0010:pv_wait_head_or_lock kernel/locking/qspinlock_paravirt.h:435 [inline] RIP: 0010:__pv_queued_spin_lock_slowpath+0x3a6/0xae0 kernel/locking/qspinlock.c:474 Code: eb c6 45 01 01 41 bc 00 80 00 00 48 c1 e9 03 83 e3 07 41 be 01 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8d 2c 01 eb 0c f3 90 <41> 83 ec 01 0f 84 38 04 00 00 41 0f b6 45 00 38 d8 7f 08 84 c0 0f RSP: 0018:ffff8880ba107bd8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000003 RBX: 0000000000000000 RCX: 1ffff110153e86b9 RDX: 0000000000000001 RSI: ffffffff8167a995 RDI: 0000000000000286 RBP: ffff8880a9f435c8 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 00000000000015be R13: ffffed10153e86b9 R14: 0000000000000001 R15: ffff8880ba12be00 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:679 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:53 [inline] queued_spin_lock include/asm-generic/qspinlock.h:88 [inline] do_raw_spin_lock+0x189/0x220 kernel/locking/spinlock_debug.c:113 spin_lock include/linux/spinlock.h:329 [inline] sctp_generate_t3_rtx_event+0xa1/0x390 net/sctp/sm_sideeffect.c:257 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:preempt_schedule_irq+0xa6/0x140 kernel/sched/core.c:3744 Code: 00 00 e8 3d 04 29 f9 e8 58 3f 4f f9 4c 89 e8 48 c1 e8 03 80 3c 18 00 75 69 48 83 3d 9b 18 d9 01 00 74 5b fb 66 0f 1f 44 00 00 01 00 00 00 e8 40 d1 ff ff 48 c7 c0 90 82 f1 89 48 c1 e8 03 80 RSP: 0018:ffff88808bc9f600 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3053 RBX: dffffc0000000000 RCX: 1ffff110124d699f RDX: 0000000000000000 RSI: ffff8880926b4cd8 RDI: ffff8880926b4c84 RBP: ffffed10124d6880 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880926b4400 R13: ffffffff89f18298 R14: 0000000000000000 R15: 0000000000000000 retint_kernel+0x1b/0x2d RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:789 [inline] RIP: 0010:lock_release+0x429/0x8b0 kernel/locking/lockdep.c:3930 Code: 84 08 00 00 00 00 00 00 48 c1 e8 03 80 3c 10 00 0f 85 95 03 00 00 48 83 3d 7b 34 a6 08 00 0f 84 cc 01 00 00 48 8b 3c 24 57 9d <0f> 1f 44 00 00 48 b8 00 00 00 00 00 fc ff df 49 c7 04 04 00 00 00 RSP: 0018:ffff88808bc9f6d0 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff13e3051 RBX: ffff8880926b4400 RCX: 1ffff110124d69a0 RDX: dffffc0000000000 RSI: 0000000000000004 RDI: 0000000000000286 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000000000 R11: 0000000000074071 R12: 1ffff11011793edd R13: 384ec1a0779fcf39 R14: ffff8880926b4400 R15: 0000000000000004 rcu_lock_release include/linux/rcupdate.h:247 [inline] rcu_read_unlock include/linux/rcupdate.h:681 [inline] is_bpf_text_address+0xfc/0x1b0 kernel/bpf/core.c:548 kernel_text_address kernel/extable.c:152 [inline] kernel_text_address+0xbd/0xf0 kernel/extable.c:122 __kernel_text_address+0x9/0x30 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_orc.c:297 [inline] unwind_get_return_address+0x51/0x90 arch/x86/kernel/unwind_orc.c:292 __save_stack_trace+0xaf/0x190 arch/x86/kernel/stacktrace.c:45 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 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node+0x38/0x70 mm/slab.c:3696 kmalloc_node include/linux/slab.h:557 [inline] kvmalloc_node+0x61/0xf0 mm/util.c:423 kvmalloc include/linux/mm.h:577 [inline] memcg_init_list_lru_node mm/list_lru.c:365 [inline] memcg_init_list_lru mm/list_lru.c:456 [inline] __list_lru_init+0x4c6/0x7f0 mm/list_lru.c:624 alloc_super fs/super.c:269 [inline] sget_userns+0x810/0xcd0 fs/super.c:519 sget+0x102/0x140 fs/super.c:570 mount_bdev+0xf8/0x3b0 fs/super.c:1131 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: 0033:0x7fb859566f6a Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fb856adafa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020002b80 RCX: 00007fb859566f6a RDX: 00000000200000c0 RSI: 0000000020000200 RDI: 00007fb856adb000 RBP: 00007fb856adb040 R08: 00007fb856adb040 R09: 00000000200000c0 R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200000c0 R13: 0000000020000200 R14: 00007fb856adb000 R15: 0000000020002c80 ---------------- Code disassembly (best guess): 0: 89 ef mov %ebp,%edi 2: e8 42 f3 2d 00 callq 0x2df349 7: 0f b6 c0 movzbl %al,%eax a: eb cf jmp 0xffffffdb c: 48 c7 c7 44 aa 26 8b mov $0xffffffff8b26aa44,%rdi 13: e8 61 44 59 00 callq 0x594479 18: e9 64 ff ff ff jmpq 0xffffff81 1d: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1) 24: 00 00 00 00 28: 90 nop 29: 53 push %rbx * 2a: 48 89 fb mov %rdi,%rbx <-- trapping instruction 2d: e8 07 ff ff ff callq 0xffffff39 32: 85 c0 test %eax,%eax 34: 75 17 jne 0x4d 36: 48 81 fb 00 80 37 8c cmp $0xffffffff8c378000,%rbx 3d: 72 0c jb 0x4b 3f: 31 .byte 0x31