./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2215589191 <...> Warning: Permanently added '10.128.1.45' (ECDSA) to the list of known hosts. execve("./syz-executor2215589191", ["./syz-executor2215589191"], 0x7ffe1e2a0930 /* 10 vars */) = 0 brk(NULL) = 0x555556007000 brk(0x555556007c40) = 0x555556007c40 arch_prctl(ARCH_SET_FS, 0x555556007300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor2215589191", 4096) = 28 brk(0x555556028c40) = 0x555556028c40 brk(0x555556029000) = 0x555556029000 mprotect(0x7f1e5c117000, 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=0x5555560075d0) = 357 ./strace-static-x86_64: Process 357 attached [pid 357] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 357] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 357] setsid() = 1 [pid 357] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 357] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 357] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 357] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 357] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 357] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 357] unshare(CLONE_NEWNS) = 0 [pid 357] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 357] unshare(CLONE_NEWIPC) = -1 EINVAL (Invalid argument) [pid 357] unshare(CLONE_NEWCGROUP) = 0 [pid 357] unshare(CLONE_NEWUTS) = 0 [pid 357] unshare(CLONE_SYSVSEM) = 0 [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory) [pid 357] getpid() = 1 [pid 357] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 0b 66 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 54 53 [ 24.483536][ T357] RSP: 0018:ffff8881dbe36ea8 EFLAGS: 00010293 [ 24.489439][ T357] RAX: ffffffff837d1483 RBX: 0000000000000519 RCX: ffff8881dbe2de80 [ 24.497249][ T357] RDX: 0000000000000000 RSI: 0000000000000519 RDI: 0000000000000621 [ 24.505060][ T357] RBP: 0000000000000621 R08: ffffffff837d0eff R09: ffffed103b7c6dc6 [ 24.512869][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f0b35cf0 [ 24.520684][ T357] R13: 000000000000061f R14: ffff8881f0b35c80 R15: 1ffff1103e166b9e [ 24.528495][ T357] FS: 0000555556007300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.537258][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.543681][ T357] CR2: 0000000020001000 CR3: 00000001dbd30000 CR4: 00000000003406a0 [ 24.551493][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.559303][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.567111][ T357] Call Trace: [ 24.570252][ T357] ip_do_fragment+0x15e/0x2200 [ 24.574846][ T357] ? ip_fragment+0x210/0x210 [ 24.579267][ T357] ? ip_frag_next+0xad0/0xad0 [ 24.583782][ T357] ? kmem_cache_free+0x10b/0x2c0 [ 24.588557][ T357] ? __ip_finish_output+0x457/0x710 [ 24.593592][ T357] ? ip_fragment+0x9a/0x210 [ 24.597928][ T357] __ip_finish_output+0x49c/0x710 [ 24.602791][ T357] ip_output+0x19b/0x3a0 [ 24.606881][ T357] ? ip_finish_output+0x1d0/0x1d0 [ 24.611728][ T357] ? ip_mc_finish_output+0x340/0x340 [ 24.616855][ T357] iptunnel_xmit+0x476/0x850 [ 24.621279][ T357] ip_tunnel_xmit+0x1a4e/0x2320 [ 24.625968][ T357] ? tnl_update_pmtu+0xbb0/0xbb0 [ 24.630738][ T357] ? gre_build_header+0x23f/0x7a0 [ 24.635601][ T357] ipgre_xmit+0x7b3/0xac0 [ 24.639763][ T357] dev_hard_start_xmit+0x1b7/0x6b0 [ 24.644713][ T357] __dev_queue_xmit+0x14da/0x27e0 [ 24.649580][ T357] ? dev_queue_xmit+0x20/0x20 [ 24.654085][ T357] ? virtio_net_hdr_to_skb+0x9c1/0x10c0 [ 24.659467][ T357] ? fanout_demux_rollover+0xc10/0xc10 [ 24.664762][ T357] packet_sendmsg+0x472e/0x60e0 [ 24.669452][ T357] ? avc_has_perm_noaudit+0x3d0/0x3d0 [ 24.674656][ T357] ? selinux_socket_sendmsg+0x243/0x340 [ 24.680035][ T357] ? selinux_socket_accept+0x5b0/0x5b0 [ 24.685332][ T357] ? rw_copy_check_uvector+0x2a3/0x2f0 [ 24.690623][ T357] ? compat_packet_setsockopt+0x160/0x160 [ 24.696186][ T357] ? copy_page_to_iter+0x460/0x760 [ 24.701125][ T357] ? security_socket_sendmsg+0x7d/0xa0 [ 24.706420][ T357] ? compat_packet_setsockopt+0x160/0x160 [ 24.711977][ T357] ____sys_sendmsg+0x5ac/0x8f0 [ 24.716574][ T357] ? __sys_sendmsg_sock+0x2b0/0x2b0 [ 24.721607][ T357] __sys_sendmsg+0x28b/0x380 [ 24.726037][ T357] ? ____sys_sendmsg+0x8f0/0x8f0 [ 24.730807][ T357] ? ptrace_notify+0x24c/0x350 [ 24.735422][ T357] ? __do_page_fault+0x725/0xbb0 [ 24.740186][ T357] do_syscall_64+0xca/0x1c0 [ 24.744524][ T357] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.750246][ T357] Modules linked in: [ 24.754025][ T357] ---[ end trace 746e4c6a1cde72a5 ]--- [ 24.759290][ T357] RIP: 0010:skb_checksum_help+0x873/0x880 [ 24.764868][ T357] Code: ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c d0 fc ff ff 48 89 df e8 8e cf 16 fe e9 c3 fc ff ff e8 64 15 e7 fd 0f 0b e8 5d 15 e7 fd <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 41 57 41 56 41 55 41 54 53 [ 24.784301][ T357] RSP: 0018:ffff8881dbe36ea8 EFLAGS: 00010293 [ 24.790174][ T357] RAX: ffffffff837d1483 RBX: 0000000000000519 RCX: ffff8881dbe2de80 [ 24.798009][ T357] RDX: 0000000000000000 RSI: 0000000000000519 RDI: 0000000000000621 [ 24.805807][ T357] RBP: 0000000000000621 R08: ffffffff837d0eff R09: ffffed103b7c6dc6 [ 24.813631][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f0b35cf0 [ 24.821420][ T357] R13: 000000000000061f R14: ffff8881f0b35c80 R15: 1ffff1103e166b9e [ 24.829251][ T357] FS: 0000555556007300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.838007][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.844438][ T357] CR2: 0000000020001000 CR3: 00000001dbd30000 CR4: 00000000003406a0 [ 24.852244][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.860037][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.867877][ T357] Kernel panic - not syncing: Fatal exception in interrupt [ 24.875075][ T357] Kernel Offset: disabled [ 24.879196][ T357] Rebooting in 86400 seconds..