./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1297559413 <...> Warning: Permanently added '10.128.1.82' (ED25519) to the list of known hosts. execve("./syz-executor1297559413", ["./syz-executor1297559413"], 0x7ffdbe47cb40 /* 10 vars */) = 0 brk(NULL) = 0x555555dd2000 brk(0x555555dd2d00) = 0x555555dd2d00 arch_prctl(ARCH_SET_FS, 0x555555dd2380) = 0 set_tid_address(0x555555dd2650) = 5059 set_robust_list(0x555555dd2660, 24) = 0 rseq(0x555555dd2ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor1297559413", 4096) = 28 getrandom("\xe6\x7c\xd4\xe6\x89\x3c\xf7\x70", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555dd2d00 brk(0x555555df3d00) = 0x555555df3d00 brk(0x555555df4000) = 0x555555df4000 mprotect(0x7f5691c3d000, 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=0x555555dd2650) = 5060 ./strace-static-x86_64: Process 5060 attached [pid 5060] set_robust_list(0x555555dd2660, 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 [ 60.246769][ T5060] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 60.254606][ T5060] #PF: supervisor instruction fetch in kernel mode [ 60.261087][ T5060] #PF: error_code(0x0010) - not-present page [ 60.267045][ T5060] PGD 2245c067 P4D 2245c067 PUD 2245d067 PMD 0 [ 60.273294][ T5060] Oops: 0010 [#1] PREEMPT SMP KASAN [ 60.278494][ T5060] CPU: 0 PID: 5060 Comm: syz-executor129 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 60.288372][ T5060] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 60.298413][ T5060] RIP: 0010:0x0 [ 60.301863][ T5060] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 60.309232][ T5060] RSP: 0018:ffffc90003c1f408 EFLAGS: 00010246 [ 60.315280][ T5060] RAX: dffffc0000000000 RBX: ffff8880693e5000 RCX: ffffffff889a5187 [ 60.323232][ T5060] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff8880693e5000 [ 60.331186][ T5060] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 60.339158][ T5060] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff88802ce06000 [ 60.347120][ T5060] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 60.355076][ T5060] FS: 0000555555dd2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 60.364039][ T5060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.370669][ T5060] CR2: ffffffffffffffd6 CR3: 000000001c528000 CR4: 00000000003506f0 [ 60.378640][ T5060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.386613][ T5060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.394588][ T5060] Call Trace: [ 60.397860][ T5060] [ 60.400800][ T5060] ? show_regs+0x8e/0xa0 [ 60.405058][ T5060] ? __die+0x2c/0x80 [ 60.408973][ T5060] ? page_fault_oops+0x397/0xab0 [ 60.413901][ T5060] ? dump_pagetable+0x530/0x530 [ 60.418764][ T5060] ? netem_change+0x1505/0x2520 [ 60.423609][ T5060] ? netem_dump+0x1260/0x1260 [ 60.428276][ T5060] ? do_user_addr_fault+0x562/0x1020 [ 60.433551][ T5060] ? rcu_is_watching+0x12/0xb0 [ 60.438303][ T5060] ? exc_page_fault+0x5c/0xc0 [ 60.442970][ T5060] ? asm_exc_page_fault+0x26/0x30 [ 60.447986][ T5060] ? kasan_save_stack+0x33/0x50 [ 60.452828][ T5060] ? qdisc_create+0xca7/0x1440 [ 60.457587][ T5060] qdisc_create+0x6c0/0x1440 [ 60.462172][ T5060] ? tc_get_qdisc+0xdf0/0xdf0 [ 60.466843][ T5060] ? __nla_parse+0x40/0x50 [ 60.471253][ T5060] tc_modify_qdisc+0x4d5/0x1c30 [ 60.476098][ T5060] ? qdisc_create+0x1440/0x1440 [ 60.480972][ T5060] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 60.486956][ T5060] ? bpf_lsm_capable+0x9/0x10 [ 60.491620][ T5060] ? security_capable+0x92/0xc0 [ 60.496463][ T5060] ? qdisc_create+0x1440/0x1440 [ 60.501305][ T5060] rtnetlink_rcv_msg+0x3c7/0xe00 [ 60.506231][ T5060] ? rtnl_fill_vf+0x490/0x490 [ 60.510902][ T5060] netlink_rcv_skb+0x16b/0x440 [ 60.515771][ T5060] ? rtnl_fill_vf+0x490/0x490 [ 60.520431][ T5060] ? netlink_ack+0x1380/0x1380 [ 60.525186][ T5060] ? lock_sync+0x190/0x190 [ 60.529587][ T5060] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 60.535910][ T5060] ? netlink_deliver_tap+0x1a0/0xd00 [ 60.541186][ T5060] ? _copy_from_iter+0x2c1/0x10f0 [ 60.546233][ T5060] netlink_unicast+0x53b/0x810 [ 60.550999][ T5060] ? netlink_attachskb+0x870/0x870 [ 60.556100][ T5060] ? __phys_addr_symbol+0x30/0x70 [ 60.561201][ T5060] ? __check_object_size+0x322/0x730 [ 60.566479][ T5060] netlink_sendmsg+0x8b4/0xd70 [ 60.571234][ T5060] ? netlink_unicast+0x810/0x810 [ 60.576157][ T5060] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 60.581430][ T5060] ? netlink_unicast+0x810/0x810 [ 60.586355][ T5060] __sock_sendmsg+0xd5/0x180 [ 60.590946][ T5060] ____sys_sendmsg+0x6ac/0x940 [ 60.595704][ T5060] ? copy_msghdr_from_user+0x10b/0x160 [ 60.601148][ T5060] ? kernel_sendmsg+0x50/0x50 [ 60.607818][ T5060] ? finish_task_switch.isra.0+0x217/0xcb0 [ 60.613615][ T5060] ? __switch_to+0x749/0x1370 [ 60.618285][ T5060] ___sys_sendmsg+0x135/0x1d0 [ 60.622978][ T5060] ? do_recvmmsg+0x740/0x740 [ 60.627572][ T5060] ? lock_sync+0x190/0x190 [ 60.631973][ T5060] ? ptrace_stop.part.0+0x44a/0x930 [ 60.637164][ T5060] ? __fget_light+0x172/0x200 [ 60.641831][ T5060] __sys_sendmsg+0x117/0x1e0 [ 60.646410][ T5060] ? __sys_sendmsg_sock+0x30/0x30 [ 60.651421][ T5060] ? ptrace_notify+0xf1/0x130 [ 60.656090][ T5060] ? _raw_spin_unlock_irq+0x2e/0x50 [ 60.661275][ T5060] ? ptrace_notify+0xf1/0x130 [ 60.665969][ T5060] do_syscall_64+0xd0/0x250 [ 60.670470][ T5060] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 60.676352][ T5060] RIP: 0033:0x7f5691bca879 [ 60.680762][ T5060] 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 [ 60.700357][ T5060] RSP: 002b:00007fffe7aa9818 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 60.708843][ T5060] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f5691bca879 [ 60.716799][ T5060] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 60.724878][ T5060] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffe7aa9890 [ 60.732836][ T5060] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 60.740789][ T5060] R13: 00007fffe7aa9a18 R14: 0000000000000001 R15: 0000000000000001 [ 60.748749][ T5060] [ 60.751750][ T5060] Modules linked in: [ 60.755630][ T5060] CR2: 0000000000000000 [ 60.759770][ T5060] ---[ end trace 0000000000000000 ]--- [ 60.765291][ T5060] RIP: 0010:0x0 [ 60.768743][ T5060] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 60.776091][ T5060] RSP: 0018:ffffc90003c1f408 EFLAGS: 00010246 [ 60.782160][ T5060] RAX: dffffc0000000000 RBX: ffff8880693e5000 RCX: ffffffff889a5187 [ 60.790132][ T5060] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff8880693e5000 [ 60.798097][ T5060] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 60.806052][ T5060] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff88802ce06000 [ 60.814008][ T5060] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 60.821961][ T5060] FS: 0000555555dd2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 60.830877][ T5060] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.837449][ T5060] CR2: ffffffffffffffd6 CR3: 000000001c528000 CR4: 00000000003506f0 [ 60.845496][ T5060] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 60.853449][ T5060] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 60.861495][ T5060] Kernel panic - not syncing: Fatal exception [ 60.867731][ T5060] Kernel Offset: disabled [ 60.872057][ T5060] Rebooting in 86400 seconds..