./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3314464248 <...> Warning: Permanently added '10.128.1.103' (ED25519) to the list of known hosts. execve("./syz-executor3314464248", ["./syz-executor3314464248"], 0x7ffc856678c0 /* 10 vars */) = 0 brk(NULL) = 0x5555563d1000 brk(0x5555563d1d00) = 0x5555563d1d00 arch_prctl(ARCH_SET_FS, 0x5555563d1380) = 0 set_tid_address(0x5555563d1650) = 5060 set_robust_list(0x5555563d1660, 24) = 0 rseq(0x5555563d1ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor3314464248", 4096) = 28 getrandom("\x1a\x21\xc9\x3b\x68\xee\xce\x63", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555563d1d00 brk(0x5555563f2d00) = 0x5555563f2d00 brk(0x5555563f3000) = 0x5555563f3000 mprotect(0x7f4948ee6000, 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=0x5555563d1650) = 5061 ./strace-static-x86_64: Process 5061 attached [pid 5061] set_robust_list(0x5555563d1660, 24) = 0 [pid 5061] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5061] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5061] setsid() = 1 [pid 5061] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5061] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5061] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5061] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5061] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5061] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5061] unshare(CLONE_NEWNS) = 0 [pid 5061] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5061] unshare(CLONE_NEWIPC) = 0 [pid 5061] unshare(CLONE_NEWCGROUP) = 0 [pid 5061] unshare(CLONE_NEWUTS) = 0 [pid 5061] unshare(CLONE_SYSVSEM) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "16777216", 8) = 8 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "536870912", 9) = 9 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1024", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "8192", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1024", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1024", 4) = 4 [pid 5061] close(3) = 0 [pid 5061] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5061] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5061] close(3) = 0 [pid 5061] getpid() = 1 [pid 5061] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 87.013149][ T5061] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 87.021098][ T5061] #PF: supervisor instruction fetch in kernel mode [ 87.027599][ T5061] #PF: error_code(0x0010) - not-present page [ 87.033576][ T5061] PGD 21b6d067 P4D 21b6d067 PUD 2d05e067 PMD 0 [ 87.039854][ T5061] Oops: 0010 [#1] PREEMPT SMP KASAN [ 87.045064][ T5061] CPU: 1 PID: 5061 Comm: syz-executor331 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 87.054977][ T5061] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 87.065054][ T5061] RIP: 0010:0x0 [ 87.068529][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 87.075939][ T5061] RSP: 0018:ffffc90003acf408 EFLAGS: 00010246 [ 87.082009][ T5061] RAX: dffffc0000000000 RBX: ffff888073047000 RCX: ffffffff889a5187 [ 87.090078][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888073047000 [ 87.098062][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 87.106042][ T5061] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff88802ce28000 [ 87.114022][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.122006][ T5061] FS: 00005555563d1380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.130953][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.137552][ T5061] CR2: ffffffffffffffd6 CR3: 000000001a299000 CR4: 00000000003506f0 [ 87.145568][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.153564][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.161548][ T5061] Call Trace: [ 87.164837][ T5061] [ 87.167790][ T5061] ? show_regs+0x8e/0xa0 [ 87.172163][ T5061] ? __die+0x2c/0x80 [ 87.176078][ T5061] ? page_fault_oops+0x397/0xab0 [ 87.181037][ T5061] ? dump_pagetable+0x530/0x530 [ 87.185901][ T5061] ? netem_change+0x1505/0x2520 [ 87.190803][ T5061] ? netem_dump+0x1260/0x1260 [ 87.195496][ T5061] ? do_user_addr_fault+0x562/0x1020 [ 87.200801][ T5061] ? rcu_is_watching+0x12/0xb0 [ 87.205589][ T5061] ? exc_page_fault+0x5c/0xc0 [ 87.210288][ T5061] ? asm_exc_page_fault+0x26/0x30 [ 87.215337][ T5061] ? kasan_save_stack+0x33/0x50 [ 87.220208][ T5061] ? qdisc_create+0xca7/0x1440 [ 87.225003][ T5061] qdisc_create+0x6c0/0x1440 [ 87.229634][ T5061] ? tc_get_qdisc+0xdf0/0xdf0 [ 87.234341][ T5061] ? __nla_parse+0x40/0x50 [ 87.238785][ T5061] tc_modify_qdisc+0x4d5/0x1c30 [ 87.243675][ T5061] ? qdisc_create+0x1440/0x1440 [ 87.248548][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 87.254578][ T5061] ? bpf_lsm_capable+0x9/0x10 [ 87.259272][ T5061] ? security_capable+0x92/0xc0 [ 87.264146][ T5061] ? qdisc_create+0x1440/0x1440 [ 87.269018][ T5061] rtnetlink_rcv_msg+0x3c7/0xe00 [ 87.273976][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 87.278689][ T5061] netlink_rcv_skb+0x16b/0x440 [ 87.283472][ T5061] ? rtnl_fill_vf+0x490/0x490 [ 87.288209][ T5061] ? netlink_ack+0x1380/0x1380 [ 87.292997][ T5061] ? lock_sync+0x190/0x190 [ 87.297423][ T5061] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 87.303791][ T5061] ? netlink_deliver_tap+0x1a0/0xd00 [ 87.309109][ T5061] ? _copy_from_iter+0x2c1/0x10f0 [ 87.314178][ T5061] netlink_unicast+0x53b/0x810 [ 87.318983][ T5061] ? netlink_attachskb+0x870/0x870 [ 87.324130][ T5061] ? __phys_addr_symbol+0x30/0x70 [ 87.329218][ T5061] ? __check_object_size+0x322/0x730 [ 87.334540][ T5061] netlink_sendmsg+0x8b4/0xd70 [ 87.339345][ T5061] ? netlink_unicast+0x810/0x810 [ 87.344310][ T5061] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 87.349627][ T5061] ? netlink_unicast+0x810/0x810 [ 87.354597][ T5061] __sock_sendmsg+0xd5/0x180 [ 87.359228][ T5061] ____sys_sendmsg+0x6ac/0x940 [ 87.364025][ T5061] ? copy_msghdr_from_user+0x10b/0x160 [ 87.369558][ T5061] ? kernel_sendmsg+0x50/0x50 [ 87.374273][ T5061] ? finish_task_switch.isra.0+0x217/0xcb0 [ 87.380107][ T5061] ? __switch_to+0x749/0x1370 [ 87.384825][ T5061] ___sys_sendmsg+0x135/0x1d0 [ 87.389533][ T5061] ? do_recvmmsg+0x740/0x740 [ 87.394155][ T5061] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 87.400195][ T5061] ? lock_sync+0x190/0x190 [ 87.404631][ T5061] ? ptrace_stop.part.0+0x44a/0x930 [ 87.409866][ T5061] ? __fget_light+0x172/0x200 [ 87.414576][ T5061] __sys_sendmsg+0x117/0x1e0 [ 87.419213][ T5061] ? __sys_sendmsg_sock+0x30/0x30 [ 87.424257][ T5061] ? ptrace_notify+0xf1/0x130 [ 87.428963][ T5061] ? _raw_spin_unlock_irq+0x2e/0x50 [ 87.434190][ T5061] ? ptrace_notify+0xf1/0x130 [ 87.438899][ T5061] do_syscall_64+0xd0/0x250 [ 87.443436][ T5061] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 87.449368][ T5061] RIP: 0033:0x7f4948e73879 [ 87.453813][ T5061] 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 [ 87.473542][ T5061] RSP: 002b:00007fffd3b1b318 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 87.481978][ T5061] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4948e73879 [ 87.489969][ T5061] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 87.497957][ T5061] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fffd3b1b390 [ 87.505949][ T5061] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 87.513941][ T5061] R13: 00007fffd3b1b518 R14: 0000000000000001 R15: 0000000000000001 [ 87.521948][ T5061] [ 87.524975][ T5061] Modules linked in: [ 87.528898][ T5061] CR2: 0000000000000000 [ 87.533141][ T5061] ---[ end trace 0000000000000000 ]--- [ 87.538599][ T5061] RIP: 0010:0x0 [ 87.542075][ T5061] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 87.549446][ T5061] RSP: 0018:ffffc90003acf408 EFLAGS: 00010246 [ 87.555529][ T5061] RAX: dffffc0000000000 RBX: ffff888073047000 RCX: ffffffff889a5187 [ 87.563680][ T5061] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888073047000 [ 87.571763][ T5061] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 87.579755][ T5061] R10: 0000000000000001 R11: ffffffff81dfa903 R12: ffff88802ce28000 [ 87.587747][ T5061] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 87.595737][ T5061] FS: 00005555563d1380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 87.604688][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 87.611290][ T5061] CR2: ffffffffffffffd6 CR3: 000000001a299000 CR4: 00000000003506f0 [ 87.619371][ T5061] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 87.627360][ T5061] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 87.635348][ T5061] Kernel panic - not syncing: Fatal exception [ 87.641724][ T5061] Kernel Offset: disabled [ 87.646051][ T5061] Rebooting in 86400 seconds..