./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3765105569 <...> Warning: Permanently added '10.128.1.108' (ECDSA) to the list of known hosts. execve("./syz-executor3765105569", ["./syz-executor3765105569"], 0x7fff51e75840 /* 10 vars */) = 0 brk(NULL) = 0x555556dc0000 brk(0x555556dc0c40) = 0x555556dc0c40 arch_prctl(ARCH_SET_FS, 0x555556dc0300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3765105569", 4096) = 28 brk(0x555556de1c40) = 0x555556de1c40 brk(0x555556de2000) = 0x555556de2000 mprotect(0x7f61a9797000, 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=0x555556dc05d0) = 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 [ 22.013562][ T357] RSP: 0018:ffff8881dbee6ea8 EFLAGS: 00010293 [ 22.019462][ T357] RAX: ffffffff837d1483 RBX: 0000000000000688 RCX: ffff8881dc21ee40 [ 22.027273][ T357] RDX: 0000000000000000 RSI: 0000000000000688 RDI: 00000000000006aa [ 22.035088][ T357] RBP: 00000000000006aa R08: ffffffff837d0eff R09: ffffed103b7dcdc6 [ 22.042910][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f0a86a70 [ 22.050712][ T357] R13: 00000000000006a8 R14: ffff8881f0a86a00 R15: 1ffff1103e150d4e [ 22.058524][ T357] FS: 0000555556dc0300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.067469][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.073892][ T357] CR2: 0000000020001000 CR3: 00000001dc321000 CR4: 00000000003406a0 [ 22.081699][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.089507][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.097316][ T357] Call Trace: [ 22.100453][ T357] ip_do_fragment+0x15e/0x2200 [ 22.105045][ T357] ? ip_fragment+0x210/0x210 [ 22.109730][ T357] ? ip_frag_next+0xad0/0xad0 [ 22.114245][ T357] ? kmem_cache_free+0x10b/0x2c0 [ 22.119017][ T357] ? __ip_finish_output+0x457/0x710 [ 22.124050][ T357] ? ip_fragment+0x9a/0x210 [ 22.128390][ T357] __ip_finish_output+0x49c/0x710 [ 22.133249][ T357] ip_output+0x19b/0x3a0 [ 22.137345][ T357] ? ip_finish_output+0x1d0/0x1d0 [ 22.142193][ T357] ? ip_mc_finish_output+0x340/0x340 [ 22.147319][ T357] iptunnel_xmit+0x476/0x850 [ 22.151747][ T357] ip_tunnel_xmit+0x1a4e/0x2320 [ 22.156443][ T357] ? tnl_update_pmtu+0xbb0/0xbb0 [ 22.161201][ T357] ? gre_build_header+0x23f/0x7a0 [ 22.166062][ T357] ipgre_xmit+0x7b3/0xac0 [ 22.170230][ T357] dev_hard_start_xmit+0x1b7/0x6b0 [ 22.175174][ T357] __dev_queue_xmit+0x14da/0x27e0 [ 22.180033][ T357] ? dev_queue_xmit+0x20/0x20 [ 22.184549][ T357] ? virtio_net_hdr_to_skb+0x9c1/0x10c0 [ 22.189933][ T357] ? fanout_demux_rollover+0xc10/0xc10 [ 22.195223][ T357] packet_sendmsg+0x472e/0x60e0 [ 22.199912][ T357] ? avc_has_perm_noaudit+0x3d0/0x3d0 [ 22.205119][ T357] ? selinux_socket_sendmsg+0x243/0x340 [ 22.210496][ T357] ? selinux_socket_accept+0x5b0/0x5b0 [ 22.215793][ T357] ? rw_copy_check_uvector+0x2a3/0x2f0 [ 22.221085][ T357] ? compat_packet_setsockopt+0x160/0x160 [ 22.226819][ T357] ? _copy_from_iter_full_nocache+0x8d9/0x9f0 [ 22.232720][ T357] ? security_socket_sendmsg+0x7d/0xa0 [ 22.238011][ T357] ? compat_packet_setsockopt+0x160/0x160 [ 22.243567][ T357] ____sys_sendmsg+0x5ac/0x8f0 [ 22.248166][ T357] ? __sys_sendmsg_sock+0x2b0/0x2b0 [ 22.253200][ T357] __sys_sendmsg+0x28b/0x380 [ 22.257627][ T357] ? ____sys_sendmsg+0x8f0/0x8f0 [ 22.262398][ T357] ? ptrace_notify+0x24c/0x350 [ 22.267005][ T357] ? __do_page_fault+0x725/0xbb0 [ 22.271774][ T357] do_syscall_64+0xca/0x1c0 [ 22.276119][ T357] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 22.281840][ T357] Modules linked in: [ 22.285662][ T357] ---[ end trace 7764d5e1285204e8 ]--- [ 22.290877][ T357] RIP: 0010:skb_checksum_help+0x873/0x880 [ 22.296465][ 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 [ 22.315896][ T357] RSP: 0018:ffff8881dbee6ea8 EFLAGS: 00010293 [ 22.321765][ T357] RAX: ffffffff837d1483 RBX: 0000000000000688 RCX: ffff8881dc21ee40 [ 22.329671][ T357] RDX: 0000000000000000 RSI: 0000000000000688 RDI: 00000000000006aa [ 22.337416][ T357] RBP: 00000000000006aa R08: ffffffff837d0eff R09: ffffed103b7dcdc6 [ 22.345752][ T357] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff8881f0a86a70 [ 22.353556][ T357] R13: 00000000000006a8 R14: ffff8881f0a86a00 R15: 1ffff1103e150d4e [ 22.361346][ T357] FS: 0000555556dc0300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 22.370140][ T357] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 22.376556][ T357] CR2: 0000000020001000 CR3: 00000001dc321000 CR4: 00000000003406a0 [ 22.384368][ T357] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 22.392158][ T357] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 22.399996][ T357] Kernel panic - not syncing: Fatal exception in interrupt [ 22.407156][ T357] Kernel Offset: disabled [ 22.411276][ T357] Rebooting in 86400 seconds..