./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor502869067 <...> DUID 00:04:23:68:77:f1:65:66:05:56:fc:6e:24:65:03:30:d5:25 forked to background, child pid 4665 [ 20.353166][ T4666] 8021q: adding VLAN 0 to HW filter on device bond0 [ 20.361836][ T4666] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.146' (ECDSA) to the list of known hosts. execve("./syz-executor502869067", ["./syz-executor502869067"], 0x7ffd74d02820 /* 10 vars */) = 0 brk(NULL) = 0x5555560e5000 brk(0x5555560e5c40) = 0x5555560e5c40 arch_prctl(ARCH_SET_FS, 0x5555560e5300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor502869067", 4096) = 27 brk(0x555556106c40) = 0x555556106c40 brk(0x555556107000) = 0x555556107000 mprotect(0x7f6c360e4000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 unshare(CLONE_NEWPID) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555560e55d0) = 4997 ./strace-static-x86_64: Process 4997 attached [pid 4997] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 4997] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 4997] setsid() = 1 [pid 4997] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 4997] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 4997] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 4997] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 4997] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 4997] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 4997] unshare(CLONE_NEWNS) = 0 [pid 4997] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 4997] unshare(CLONE_NEWIPC) = 0 [pid 4997] unshare(CLONE_NEWCGROUP) = 0 [pid 4997] unshare(CLONE_NEWUTS) = 0 [pid 4997] unshare(CLONE_SYSVSEM) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "16777216", 8) = 8 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "536870912", 9) = 9 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "1024", 4) = 4 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "8192", 4) = 4 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "1024", 4) = 4 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "1024", 4) = 4 [pid 4997] close(3) = 0 [pid 4997] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 4997] write(3, "1024 1048576 500 1024", 21) = 21 [pid 4997] close(3) = 0 [pid 4997] getpid() = 1 [pid 4997] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<frame_sz = 131072 [ 40.890346][ T4997] WARNING: CPU: 1 PID: 4997 at net/core/filter.c:4120 bpf_xdp_adjust_tail+0x461/0x9a0 [ 40.899916][ T4997] Modules linked in: [ 40.903786][ T4997] CPU: 1 PID: 4997 Comm: syz-executor502 Not tainted 6.4.0-rc3-syzkaller-00291-g4e893b5aa4ac #0 [ 40.914370][ T4997] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 40.924458][ T4997] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 40.930393][ T4997] Code: ff 89 de e8 f1 81 6b f9 84 db 0f 85 59 fd ff ff e8 04 86 6b f9 89 ee 48 c7 c7 40 ec 5e 8b c6 05 a1 04 4c 06 01 e8 7f 41 33 f9 <0f> 0b e9 38 fd ff ff e8 c3 4f be f9 e9 64 fc ff ff e8 b9 4f be f9 [ 40.950011][ T4997] RSP: 0018:ffffc900038ef8f8 EFLAGS: 00010286 [ 40.956094][ T4997] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 40.964424][ T4997] RDX: ffff88802c735940 RSI: ffffffff814c03e7 RDI: 0000000000000001 [ 40.972446][ T4997] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 40.980434][ T4997] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 40.988428][ T4997] R13: ffff888076d4feef R14: 0000000000000000 R15: ffffc900038efab0 [ 40.996506][ T4997] FS: 00005555560e5300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 41.005418][ T4997] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 41.012034][ T4997] CR2: 0000000020010000 CR3: 00000000186a7000 CR4: 0000000000350ee0 [ 41.020028][ T4997] Call Trace: [ 41.023358][ T4997] [ 41.026349][ T4997] ? skb_free_head+0x110/0x1b0 [ 41.031128][ T4997] ? skb_headers_offset_update+0x129/0x260 [ 41.037077][ T4997] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 41.042602][ T4997] bpf_prog_run_generic_xdp+0x578/0x1210 [ 41.048259][ T4997] netif_receive_generic_xdp+0x2e8/0x7d0 [ 41.053873][ T4997] do_xdp_generic+0x9a/0x1b0 [ 41.058474][ T4997] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 41.064629][ T4997] tun_get_user+0x1bf3/0x3b00 [ 41.069344][ T4997] ? ref_tracker_alloc+0x2cf/0x580 [ 41.074464][ T4997] ? tun_build_skb+0x1230/0x1230 [ 41.079420][ T4997] ? lock_downgrade+0x690/0x690 [ 41.084284][ T4997] tun_chr_write_iter+0xdf/0x200 [ 41.089238][ T4997] vfs_write+0x945/0xd50 [ 41.093479][ T4997] ? kernel_write+0x670/0x670 [ 41.098191][ T4997] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 41.103654][ T4997] ? find_held_lock+0x2d/0x110 [ 41.108449][ T4997] ? lock_downgrade+0x690/0x690 [ 41.113342][ T4997] ? __fget_light+0x20a/0x270 [ 41.118048][ T4997] ksys_write+0x12b/0x250 [ 41.122375][ T4997] ? __ia32_sys_read+0xb0/0xb0 [ 41.127174][ T4997] ? lockdep_hardirqs_on+0x7d/0x100 [ 41.132377][ T4997] ? _raw_spin_unlock_irq+0x2e/0x50 [ 41.137595][ T4997] ? ptrace_notify+0xfe/0x140 [ 41.142281][ T4997] do_syscall_64+0x39/0xb0 [ 41.146744][ T4997] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.152655][ T4997] RIP: 0033:0x7f6c36031a63 [ 41.157106][ T4997] Code: 5d 41 5c 41 5d 41 5e e9 9b fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 [ 41.176741][ T4997] RSP: 002b:00007fff53d81a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.185147][ T4997] RAX: ffffffffffffffda RBX: 00007fff53d81a80 RCX: 00007f6c36031a63 [ 41.193135][ T4997] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 41.201132][ T4997] RBP: 0000000000000003 R08: bb1414ac00000050 R09: bb1414ac00000050 [ 41.209114][ T4997] R10: bb1414ac00000050 R11: 0000000000000246 R12: 0000000000000000 [ 41.217099][ T4997] R13: 00007fff53d81a70 R14: 00007fff53d81a68 R15: 00007fff53d81a64 [ 41.225074][ T4997] [ 41.228140][ T4997] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 41.235405][ T4997] CPU: 1 PID: 4997 Comm: syz-executor502 Not tainted 6.4.0-rc3-syzkaller-00291-g4e893b5aa4ac #0 [ 41.245792][ T4997] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 41.255827][ T4997] Call Trace: [ 41.259082][ T4997] [ 41.261993][ T4997] dump_stack_lvl+0xd9/0x150 [ 41.266570][ T4997] panic+0x686/0x730 [ 41.270447][ T4997] ? panic_smp_self_stop+0xa0/0xa0 [ 41.275534][ T4997] ? show_trace_log_lvl+0x285/0x390 [ 41.280722][ T4997] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 41.285995][ T4997] check_panic_on_warn+0xb1/0xc0 [ 41.290984][ T4997] __warn+0xf2/0x390 [ 41.294901][ T4997] ? __wake_up_klogd.part.0+0x99/0xf0 [ 41.300275][ T4997] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 41.305560][ T4997] report_bug+0x2da/0x500 [ 41.309890][ T4997] handle_bug+0x3c/0x70 [ 41.314033][ T4997] exc_invalid_op+0x18/0x50 [ 41.318523][ T4997] asm_exc_invalid_op+0x1a/0x20 [ 41.323370][ T4997] RIP: 0010:bpf_xdp_adjust_tail+0x461/0x9a0 [ 41.329257][ T4997] Code: ff 89 de e8 f1 81 6b f9 84 db 0f 85 59 fd ff ff e8 04 86 6b f9 89 ee 48 c7 c7 40 ec 5e 8b c6 05 a1 04 4c 06 01 e8 7f 41 33 f9 <0f> 0b e9 38 fd ff ff e8 c3 4f be f9 e9 64 fc ff ff e8 b9 4f be f9 [ 41.348856][ T4997] RSP: 0018:ffffc900038ef8f8 EFLAGS: 00010286 [ 41.354913][ T4997] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 41.362887][ T4997] RDX: ffff88802c735940 RSI: ffffffff814c03e7 RDI: 0000000000000001 [ 41.370861][ T4997] RBP: 0000000000020000 R08: 0000000000000001 R09: 0000000000000000 [ 41.378843][ T4997] R10: 0000000000000000 R11: 0000000000000001 R12: ffffffffffffffea [ 41.386815][ T4997] R13: ffff888076d4feef R14: 0000000000000000 R15: ffffc900038efab0 [ 41.394782][ T4997] ? __warn_printk+0x187/0x310 [ 41.399552][ T4997] ? bpf_xdp_adjust_tail+0x461/0x9a0 [ 41.404831][ T4997] ? skb_free_head+0x110/0x1b0 [ 41.409617][ T4997] ? skb_headers_offset_update+0x129/0x260 [ 41.415420][ T4997] bpf_prog_4add87e5301a4105+0x1a/0x1c [ 41.420866][ T4997] bpf_prog_run_generic_xdp+0x578/0x1210 [ 41.426508][ T4997] netif_receive_generic_xdp+0x2e8/0x7d0 [ 41.432133][ T4997] do_xdp_generic+0x9a/0x1b0 [ 41.436712][ T4997] ? __netif_receive_skb_list_core+0x8f0/0x8f0 [ 41.442947][ T4997] tun_get_user+0x1bf3/0x3b00 [ 41.447707][ T4997] ? ref_tracker_alloc+0x2cf/0x580 [ 41.452816][ T4997] ? tun_build_skb+0x1230/0x1230 [ 41.457751][ T4997] ? lock_downgrade+0x690/0x690 [ 41.463044][ T4997] tun_chr_write_iter+0xdf/0x200 [ 41.467976][ T4997] vfs_write+0x945/0xd50 [ 41.472206][ T4997] ? kernel_write+0x670/0x670 [ 41.476865][ T4997] ? recalc_sigpending_tsk+0x18b/0x1d0 [ 41.482315][ T4997] ? find_held_lock+0x2d/0x110 [ 41.487080][ T4997] ? lock_downgrade+0x690/0x690 [ 41.491934][ T4997] ? __fget_light+0x20a/0x270 [ 41.496619][ T4997] ksys_write+0x12b/0x250 [ 41.500936][ T4997] ? __ia32_sys_read+0xb0/0xb0 [ 41.505694][ T4997] ? lockdep_hardirqs_on+0x7d/0x100 [ 41.510885][ T4997] ? _raw_spin_unlock_irq+0x2e/0x50 [ 41.516164][ T4997] ? ptrace_notify+0xfe/0x140 [ 41.520847][ T4997] do_syscall_64+0x39/0xb0 [ 41.525257][ T4997] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 41.531146][ T4997] RIP: 0033:0x7f6c36031a63 [ 41.535546][ T4997] Code: 5d 41 5c 41 5d 41 5e e9 9b fd ff ff 66 2e 0f 1f 84 00 00 00 00 00 90 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 55 c3 0f 1f 40 00 48 83 ec 28 48 89 54 24 18 [ 41.555143][ T4997] RSP: 002b:00007fff53d81a58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 41.563546][ T4997] RAX: ffffffffffffffda RBX: 00007fff53d81a80 RCX: 00007f6c36031a63 [ 41.571508][ T4997] RDX: 000000000000fdef RSI: 0000000020000300 RDI: 00000000000000c8 [ 41.579463][ T4997] RBP: 0000000000000003 R08: bb1414ac00000050 R09: bb1414ac00000050 [ 41.587423][ T4997] R10: bb1414ac00000050 R11: 0000000000000246 R12: 0000000000000000 [ 41.595380][ T4997] R13: 00007fff53d81a70 R14: 00007fff53d81a68 R15: 00007fff53d81a64 [ 41.603349][ T4997] [ 41.607299][ T4997] Kernel Offset: disabled [ 41.611659][ T4997] Rebooting in 86400 seconds..