./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3398978374 <...> Warning: Permanently added '10.128.0.243' (ED25519) to the list of known hosts. execve("./syz-executor3398978374", ["./syz-executor3398978374"], 0x7ffe90886720 /* 10 vars */) = 0 brk(NULL) = 0x5555562af000 brk(0x5555562afd00) = 0x5555562afd00 arch_prctl(ARCH_SET_FS, 0x5555562af380) = 0 set_tid_address(0x5555562af650) = 5057 set_robust_list(0x5555562af660, 24) = 0 rseq(0x5555562afca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3398978374", 4096) = 28 getrandom("\x20\xc5\x28\xb5\x3b\xac\xc1\x9c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555562afd00 brk(0x5555562d0d00) = 0x5555562d0d00 brk(0x5555562d1000) = 0x5555562d1000 mprotect(0x7f046f587000, 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=0x5555562af650) = 5058 ./strace-static-x86_64: Process 5058 attached [pid 5058] set_robust_list(0x5555562af660, 24) = 0 [pid 5058] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5058] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5058] setsid() = 1 [pid 5058] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5058] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5058] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5058] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5058] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5058] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5058] unshare(CLONE_NEWNS) = 0 [pid 5058] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5058] unshare(CLONE_NEWIPC) = 0 [pid 5058] unshare(CLONE_NEWCGROUP) = 0 [pid 5058] unshare(CLONE_NEWUTS) = 0 [pid 5058] unshare(CLONE_SYSVSEM) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "16777216", 8) = 8 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "536870912", 9) = 9 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1024", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "8192", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1024", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1024", 4) = 4 [pid 5058] close(3) = 0 [pid 5058] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5058] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5058] close(3) = 0 [pid 5058] getpid() = 1 [pid 5058] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 90.573340][ T5058] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 90.581223][ T5058] #PF: supervisor instruction fetch in kernel mode [ 90.588348][ T5058] #PF: error_code(0x0010) - not-present page [ 90.594333][ T5058] PGD 7b51a067 P4D 7b51a067 PUD 7b51b067 PMD 0 [ 90.600607][ T5058] Oops: 0010 [#1] PREEMPT SMP KASAN [ 90.605824][ T5058] CPU: 1 PID: 5058 Comm: syz-executor339 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 90.616535][ T5058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 90.626614][ T5058] RIP: 0010:0x0 [ 90.630091][ T5058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 90.637457][ T5058] RSP: 0018:ffffc90003f7f408 EFLAGS: 00010246 [ 90.643530][ T5058] RAX: dffffc0000000000 RBX: ffff88807cbe8000 RCX: ffffffff889a5187 [ 90.651529][ T5058] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807cbe8000 [ 90.659507][ T5058] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 90.667496][ T5058] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807ccf8000 [ 90.675473][ T5058] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 90.683454][ T5058] FS: 00005555562af380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 90.692409][ T5058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 90.699015][ T5058] CR2: ffffffffffffffd6 CR3: 0000000029c90000 CR4: 00000000003506f0 [ 90.707003][ T5058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 90.714991][ T5058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 90.722983][ T5058] Call Trace: [ 90.726287][ T5058] [ 90.729230][ T5058] ? show_regs+0x8e/0xa0 [ 90.733529][ T5058] ? __die+0x2c/0x80 [ 90.737636][ T5058] ? page_fault_oops+0x397/0xab0 [ 90.742707][ T5058] ? dump_pagetable+0x530/0x530 [ 90.747590][ T5058] ? netem_change+0x1505/0x2520 [ 90.752477][ T5058] ? netem_dump+0x1260/0x1260 [ 90.757179][ T5058] ? do_user_addr_fault+0x562/0x1020 [ 90.762488][ T5058] ? rcu_is_watching+0x12/0xb0 [ 90.767285][ T5058] ? exc_page_fault+0x5c/0xc0 [ 90.772506][ T5058] ? asm_exc_page_fault+0x26/0x30 [ 90.777554][ T5058] ? entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 90.783754][ T5058] ? qdisc_create+0xca7/0x1440 [ 90.788579][ T5058] qdisc_create+0x6c0/0x1440 [ 90.793208][ T5058] ? tc_get_qdisc+0xdf0/0xdf0 [ 90.798008][ T5058] ? __nla_parse+0x40/0x50 [ 90.802592][ T5058] tc_modify_qdisc+0x4d5/0x1c30 [ 90.807489][ T5058] ? qdisc_create+0x1440/0x1440 [ 90.812392][ T5058] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 90.818536][ T5058] ? bpf_lsm_capable+0x9/0x10 [ 90.823679][ T5058] ? security_capable+0x92/0xc0 [ 90.828563][ T5058] ? qdisc_create+0x1440/0x1440 [ 90.833543][ T5058] rtnetlink_rcv_msg+0x3c7/0xe00 [ 90.838529][ T5058] ? rtnl_fill_vf+0x490/0x490 [ 90.843247][ T5058] netlink_rcv_skb+0x16b/0x440 [ 90.848153][ T5058] ? rtnl_fill_vf+0x490/0x490 [ 90.852855][ T5058] ? netlink_ack+0x1380/0x1380 [ 90.857751][ T5058] ? lock_sync+0x190/0x190 [ 90.862485][ T5058] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 90.868867][ T5058] ? netlink_deliver_tap+0x1a0/0xd00 [ 90.874294][ T5058] ? _copy_from_iter+0x2c1/0x10f0 [ 90.879476][ T5058] netlink_unicast+0x53b/0x810 [ 90.884375][ T5058] ? netlink_attachskb+0x870/0x870 [ 90.889569][ T5058] ? __phys_addr_symbol+0x30/0x70 [ 90.894989][ T5058] ? __check_object_size+0x322/0x730 [ 90.900414][ T5058] netlink_sendmsg+0x8b4/0xd70 [ 90.905415][ T5058] ? netlink_unicast+0x810/0x810 [ 90.910398][ T5058] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 90.915901][ T5058] ? netlink_unicast+0x810/0x810 [ 90.920975][ T5058] __sock_sendmsg+0xd5/0x180 [ 90.925638][ T5058] ____sys_sendmsg+0x6ac/0x940 [ 90.930458][ T5058] ? copy_msghdr_from_user+0x10b/0x160 [ 90.935969][ T5058] ? kernel_sendmsg+0x50/0x50 [ 90.940736][ T5058] ? finish_task_switch.isra.0+0x217/0xcb0 [ 90.946599][ T5058] ? __switch_to+0x749/0x1370 [ 90.951323][ T5058] ___sys_sendmsg+0x135/0x1d0 [ 90.956665][ T5058] ? do_recvmmsg+0x740/0x740 [ 90.961381][ T5058] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 90.967427][ T5058] ? lock_sync+0x190/0x190 [ 90.971914][ T5058] ? ptrace_stop.part.0+0x44a/0x930 [ 90.977311][ T5058] ? __fget_light+0x172/0x200 [ 90.982298][ T5058] __sys_sendmsg+0x117/0x1e0 [ 90.986919][ T5058] ? __sys_sendmsg_sock+0x30/0x30 [ 90.992055][ T5058] ? ptrace_notify+0xf1/0x130 [ 90.996765][ T5058] ? _raw_spin_unlock_irq+0x2e/0x50 [ 91.002080][ T5058] ? ptrace_notify+0xf1/0x130 [ 91.006882][ T5058] do_syscall_64+0xd0/0x250 [ 91.011422][ T5058] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 91.017356][ T5058] RIP: 0033:0x7f046f5138b9 [ 91.021790][ T5058] Code: 48 83 c4 28 c3 e8 27 18 00 00 0f 1f 80 00 00 00 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 b8 ff ff ff f7 d8 64 89 01 48 [ 91.041601][ T5058] RSP: 002b:00007ffe6d9fafd8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 91.050049][ T5058] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f046f5138b9 [ 91.058141][ T5058] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 91.066138][ T5058] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffe6d9fb050 [ 91.074138][ T5058] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 91.082135][ T5058] R13: 00007ffe6d9fb1d8 R14: 0000000000000001 R15: 0000000000000001 [ 91.090147][ T5058] [ 91.093195][ T5058] Modules linked in: [ 91.097113][ T5058] CR2: 0000000000000000 [ 91.101281][ T5058] ---[ end trace 0000000000000000 ]--- [ 91.106773][ T5058] RIP: 0010:0x0 [ 91.110259][ T5058] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 91.117654][ T5058] RSP: 0018:ffffc90003f7f408 EFLAGS: 00010246 [ 91.123745][ T5058] RAX: dffffc0000000000 RBX: ffff88807cbe8000 RCX: ffffffff889a5187 [ 91.131823][ T5058] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff88807cbe8000 [ 91.139814][ T5058] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 91.148061][ T5058] R10: 0000000000000001 R11: ffffffff8aa00087 R12: ffff88807ccf8000 [ 91.156135][ T5058] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 91.164126][ T5058] FS: 00005555562af380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 91.173163][ T5058] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 91.179768][ T5058] CR2: ffffffffffffffd6 CR3: 0000000029c90000 CR4: 00000000003506f0 [ 91.187847][ T5058] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 91.195848][ T5058] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 91.204017][ T5058] Kernel panic - not syncing: Fatal exception [ 91.210291][ T5058] Kernel Offset: disabled [ 91.214639][ T5058] Rebooting in 86400 seconds..