./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1332443770 <...> Warning: Permanently added '10.128.0.127' (ED25519) to the list of known hosts. execve("./syz-executor1332443770", ["./syz-executor1332443770"], 0x7ffd3ff3ce60 /* 10 vars */) = 0 brk(NULL) = 0x5555571ec000 brk(0x5555571ecd00) = 0x5555571ecd00 arch_prctl(ARCH_SET_FS, 0x5555571ec380) = 0 set_tid_address(0x5555571ec650) = 5059 set_robust_list(0x5555571ec660, 24) = 0 rseq(0x5555571ecca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1332443770", 4096) = 28 getrandom("\xb2\xa2\x54\xd9\x90\x91\xbc\xa3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555571ecd00 brk(0x55555720dd00) = 0x55555720dd00 brk(0x55555720e000) = 0x55555720e000 mprotect(0x7f3060c4a000, 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./strace-static-x86_64: Process 5060 attached , child_tidptr=0x5555571ec650) = 5060 [pid 5060] set_robust_list(0x5555571ec660, 24) = 0 [pid 5060] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5060] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5060] setsid() = 1 [pid 5060] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5060] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5060] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5060] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5060] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5060] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5060] unshare(CLONE_NEWNS) = 0 [pid 5060] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5060] unshare(CLONE_NEWIPC) = 0 [pid 5060] unshare(CLONE_NEWCGROUP) = 0 [pid 5060] unshare(CLONE_NEWUTS) = 0 [pid 5060] unshare(CLONE_SYSVSEM) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "16777216", 8) = 8 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "536870912", 9) = 9 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1024", 4) = 4 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "8192", 4) = 4 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1024", 4) = 4 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1024", 4) = 4 [pid 5060] close(3) = 0 [pid 5060] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5060] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5060] close(3) = 0 [pid 5060] getpid() = 1 [pid 5060] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 86.901251][ T5063] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 86.909291][ T5063] #PF: supervisor instruction fetch in kernel mode [ 86.915796][ T5063] #PF: error_code(0x0010) - not-present page [ 86.921775][ T5063] PGD 79023067 P4D 79023067 PUD 7d5e2067 PMD 0 [ 86.928050][ T5063] Oops: 0010 [#1] PREEMPT SMP KASAN [ 86.933269][ T5063] CPU: 1 PID: 5063 Comm: syz-executor133 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 86.943168][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 86.953230][ T5063] RIP: 0010:0x0 [ 86.956706][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 86.964068][ T5063] RSP: 0018:ffffc90003b9f408 EFLAGS: 00010246 [ 86.970188][ T5063] RAX: dffffc0000000000 RBX: ffff88802382b000 RCX: ffffffff889a5187 [ 86.978177][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802382b000 [ 86.986165][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 86.994237][ T5063] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888058e34000 [ 87.002219][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.010198][ T5063] FS: 00005555571ec380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.019140][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.025728][ T5063] CR2: ffffffffffffffd6 CR3: 0000000069468000 CR4: 00000000003506f0 [ 87.033716][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.041696][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.049673][ T5063] Call Trace: [ 87.052953][ T5063] [ 87.055886][ T5063] ? show_regs+0x8e/0xa0 [ 87.060161][ T5063] ? __die+0x2c/0x80 [ 87.064073][ T5063] ? page_fault_oops+0x397/0xab0 [ 87.069037][ T5063] ? dump_pagetable+0x530/0x530 [ 87.073921][ T5063] ? netem_change+0x1505/0x2520 [ 87.078805][ T5063] ? netem_dump+0x1260/0x1260 [ 87.083494][ T5063] ? do_user_addr_fault+0x562/0x1020 [ 87.088793][ T5063] ? rcu_is_watching+0x12/0xb0 [ 87.093598][ T5063] ? exc_page_fault+0x5c/0xc0 [ 87.098329][ T5063] ? asm_exc_page_fault+0x26/0x30 [ 87.103369][ T5063] ? kasan_save_stack+0x33/0x50 [ 87.108247][ T5063] ? qdisc_create+0xca7/0x1440 [ 87.113045][ T5063] qdisc_create+0x6c0/0x1440 [ 87.117661][ T5063] ? tc_get_qdisc+0xdf0/0xdf0 [ 87.122356][ T5063] ? __nla_parse+0x40/0x50 [ 87.126794][ T5063] tc_modify_qdisc+0x4d5/0x1c30 [ 87.131694][ T5063] ? qdisc_create+0x1440/0x1440 [ 87.136575][ T5063] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 87.142610][ T5063] ? bpf_lsm_capable+0x9/0x10 [ 87.147299][ T5063] ? security_capable+0x92/0xc0 [ 87.152171][ T5063] ? qdisc_create+0x1440/0x1440 [ 87.157049][ T5063] rtnetlink_rcv_msg+0x3c7/0xe00 [ 87.162001][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 87.166694][ T5063] netlink_rcv_skb+0x16b/0x440 [ 87.171486][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 87.176181][ T5063] ? netlink_ack+0x1380/0x1380 [ 87.180975][ T5063] ? lock_sync+0x190/0x190 [ 87.185408][ T5063] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 87.191777][ T5063] ? netlink_deliver_tap+0x1a0/0xd00 [ 87.197102][ T5063] ? _copy_from_iter+0x2c1/0x10f0 [ 87.202152][ T5063] netlink_unicast+0x53b/0x810 [ 87.206943][ T5063] ? netlink_attachskb+0x870/0x870 [ 87.212086][ T5063] ? __phys_addr_symbol+0x30/0x70 [ 87.217549][ T5063] ? __check_object_size+0x322/0x730 [ 87.222874][ T5063] netlink_sendmsg+0x8b4/0xd70 [ 87.227684][ T5063] ? netlink_unicast+0x810/0x810 [ 87.232674][ T5063] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 87.238009][ T5063] ? netlink_unicast+0x810/0x810 [ 87.242983][ T5063] __sock_sendmsg+0xd5/0x180 [ 87.247655][ T5063] ____sys_sendmsg+0x6ac/0x940 [ 87.252875][ T5063] ? copy_msghdr_from_user+0x10b/0x160 [ 87.258383][ T5063] ? kernel_sendmsg+0x50/0x50 [ 87.263096][ T5063] ? finish_task_switch.isra.0+0x217/0xcb0 [ 87.268958][ T5063] ? __switch_to+0x749/0x1370 [ 87.273665][ T5063] ___sys_sendmsg+0x135/0x1d0 [ 87.278361][ T5063] ? do_recvmmsg+0x740/0x740 [ 87.282982][ T5063] ? lock_sync+0x190/0x190 [ 87.287425][ T5063] ? ptrace_stop.part.0+0x44a/0x930 [ 87.292677][ T5063] ? __fget_light+0x172/0x200 [ 87.297399][ T5063] __sys_sendmsg+0x117/0x1e0 [ 87.302042][ T5063] ? __sys_sendmsg_sock+0x30/0x30 [ 87.307121][ T5063] ? ptrace_notify+0xf1/0x130 [ 87.311954][ T5063] ? _raw_spin_unlock_irq+0x2e/0x50 [ 87.317200][ T5063] ? ptrace_notify+0xf1/0x130 [ 87.321927][ T5063] do_syscall_64+0xd0/0x250 [ 87.326488][ T5063] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 87.332519][ T5063] RIP: 0033:0x7f3060bd6fc9 [ 87.336983][ T5063] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 21 18 00 00 90 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 [ 87.356643][ T5063] RSP: 002b:00007ffcec3e5db8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.365105][ T5063] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3060bd6fc9 [ 87.373108][ T5063] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 87.381114][ T5063] RBP: 0000000000000000 R08: 0000000000000000 R09: 00005555571ed610 [ 87.389116][ T5063] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.397121][ T5063] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 87.405135][ T5063] [ 87.408176][ T5063] Modules linked in: [ 87.412093][ T5063] CR2: 0000000000000000 [ 87.416275][ T5063] ---[ end trace 0000000000000000 ]--- [ 87.421759][ T5063] RIP: 0010:0x0 [ 87.425262][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 87.432661][ T5063] RSP: 0018:ffffc90003b9f408 EFLAGS: 00010246 [ 87.438782][ T5063] RAX: dffffc0000000000 RBX: ffff88802382b000 RCX: ffffffff889a5187 [ 87.446798][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88802382b000 [ 87.454808][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 87.462814][ T5063] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff888058e34000 [ 87.470823][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.478831][ T5063] FS: 00005555571ec380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.487802][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.494421][ T5063] CR2: ffffffffffffffd6 CR3: 0000000069468000 CR4: 00000000003506f0 [ 87.502413][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.510485][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.518473][ T5063] Kernel panic - not syncing: Fatal exception [ 87.524772][ T5063] Kernel Offset: disabled [ 87.529193][ T5063] Rebooting in 86400 seconds..