./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2053390162 <...> Warning: Permanently added '10.128.0.7' (ED25519) to the list of known hosts. execve("./syz-executor2053390162", ["./syz-executor2053390162"], 0x7fffb86b52f0 /* 10 vars */) = 0 brk(NULL) = 0x555556dad000 brk(0x555556dadd00) = 0x555556dadd00 arch_prctl(ARCH_SET_FS, 0x555556dad380) = 0 set_tid_address(0x555556dad650) = 5062 set_robust_list(0x555556dad660, 24) = 0 rseq(0x555556dadca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2053390162", 4096) = 28 getrandom("\x55\x87\x1a\x28\x56\xcc\x4d\x27", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556dadd00 brk(0x555556dced00) = 0x555556dced00 brk(0x555556dcf000) = 0x555556dcf000 mprotect(0x7fb763732000, 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=0x555556dad650) = 5063 ./strace-static-x86_64: Process 5063 attached [pid 5063] set_robust_list(0x555556dad660, 24) = 0 [pid 5063] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy) [pid 5063] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5063] setsid() = 1 [pid 5063] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0 [pid 5063] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0 [pid 5063] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0 [pid 5063] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0 [pid 5063] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0 [pid 5063] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0 [pid 5063] unshare(CLONE_NEWNS) = 0 [pid 5063] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0 [pid 5063] unshare(CLONE_NEWIPC) = 0 [pid 5063] unshare(CLONE_NEWCGROUP) = 0 [pid 5063] unshare(CLONE_NEWUTS) = 0 [pid 5063] unshare(CLONE_SYSVSEM) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "16777216", 8) = 8 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "536870912", 9) = 9 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1024", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "8192", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1024", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1024", 4) = 4 [pid 5063] close(3) = 0 [pid 5063] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3 [pid 5063] write(3, "1024 1048576 500 1024", 21) = 21 [pid 5063] close(3) = 0 [pid 5063] getpid() = 1 [pid 5063] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1< 12]) = 0 [ 106.963699][ T5063] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 106.973995][ T5063] #PF: supervisor instruction fetch in kernel mode [ 106.983873][ T5063] #PF: error_code(0x0010) - not-present page [ 106.990480][ T5063] PGD 20a9f067 P4D 20a9f067 PUD 21fba067 PMD 0 [ 106.997814][ T5063] Oops: 0010 [#1] PREEMPT SMP KASAN [ 107.003512][ T5063] CPU: 1 PID: 5063 Comm: syz-executor205 Not tainted 6.7.0-rc8-next-20240105-syzkaller #0 [ 107.015250][ T5063] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 107.028368][ T5063] RIP: 0010:0x0 [ 107.034258][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 107.045568][ T5063] RSP: 0018:ffffc9000391f408 EFLAGS: 00010246 [ 107.053672][ T5063] RAX: dffffc0000000000 RBX: ffff888023901000 RCX: ffffffff889a5187 [ 107.064482][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023901000 [ 107.073386][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 107.082695][ T5063] R10: 0000000000000001 R11: 00000000b2608160 R12: ffff88807b986000 [ 107.093145][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 107.101327][ T5063] FS: 0000555556dad380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 107.112994][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.119914][ T5063] CR2: ffffffffffffffd6 CR3: 00000000797bb000 CR4: 00000000003506f0 [ 107.129762][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.149220][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.158019][ T5063] Call Trace: [ 107.161417][ T5063] [ 107.164517][ T5063] ? show_regs+0x8e/0xa0 [ 107.168915][ T5063] ? __die+0x2c/0x80 [ 107.172851][ T5063] ? page_fault_oops+0x397/0xab0 [ 107.177917][ T5063] ? dump_pagetable+0x530/0x530 [ 107.182916][ T5063] ? netem_change+0x1505/0x2520 [ 107.188001][ T5063] ? netem_dump+0x1260/0x1260 [ 107.194455][ T5063] ? do_user_addr_fault+0x562/0x1020 [ 107.199948][ T5063] ? rcu_is_watching+0x12/0xb0 [ 107.204862][ T5063] ? exc_page_fault+0x5c/0xc0 [ 107.210289][ T5063] ? asm_exc_page_fault+0x26/0x30 [ 107.215636][ T5063] ? qdisc_create+0xca7/0x1440 [ 107.222657][ T5063] qdisc_create+0x6c0/0x1440 [ 107.232957][ T5063] ? tc_get_qdisc+0xdf0/0xdf0 [ 107.243717][ T5063] ? __nla_parse+0x40/0x50 [ 107.251151][ T5063] tc_modify_qdisc+0x4d5/0x1c30 [ 107.260614][ T5063] ? qdisc_create+0x1440/0x1440 [ 107.269578][ T5063] ? trace_irq_enable.constprop.0+0xe0/0x110 [ 107.277647][ T5063] ? bpf_lsm_capable+0x9/0x10 [ 107.287654][ T5063] ? security_capable+0x92/0xc0 [ 107.296672][ T5063] ? qdisc_create+0x1440/0x1440 [ 107.303335][ T5063] rtnetlink_rcv_msg+0x3c7/0xe00 [ 107.310134][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 107.321746][ T5063] netlink_rcv_skb+0x16b/0x440 [ 107.328950][ T5063] ? rtnl_fill_vf+0x490/0x490 [ 107.334788][ T5063] ? netlink_ack+0x1380/0x1380 [ 107.342173][ T5063] ? lock_sync+0x190/0x190 [ 107.348976][ T5063] ? __rhashtable_lookup.constprop.0+0x397/0x710 [ 107.356023][ T5063] ? netlink_deliver_tap+0x1a0/0xd00 [ 107.362152][ T5063] ? _copy_from_iter+0x2c1/0x10f0 [ 107.370090][ T5063] netlink_unicast+0x53b/0x810 [ 107.379184][ T5063] ? netlink_attachskb+0x870/0x870 [ 107.387817][ T5063] ? __phys_addr_symbol+0x30/0x70 [ 107.393943][ T5063] ? __check_object_size+0x322/0x730 [ 107.402053][ T5063] netlink_sendmsg+0x8b4/0xd70 [ 107.408292][ T5063] ? netlink_unicast+0x810/0x810 [ 107.413477][ T5063] ? bpf_lsm_socket_sendmsg+0x9/0x10 [ 107.421187][ T5063] ? netlink_unicast+0x810/0x810 [ 107.428989][ T5063] __sock_sendmsg+0xd5/0x180 [ 107.434783][ T5063] ____sys_sendmsg+0x6ac/0x940 [ 107.443010][ T5063] ? copy_msghdr_from_user+0x10b/0x160 [ 107.451177][ T5063] ? kernel_sendmsg+0x50/0x50 [ 107.457223][ T5063] ? finish_task_switch.isra.0+0x217/0xcb0 [ 107.467690][ T5063] ? __switch_to+0x749/0x1370 [ 107.473492][ T5063] ___sys_sendmsg+0x135/0x1d0 [ 107.483554][ T5063] ? do_recvmmsg+0x740/0x740 [ 107.489476][ T5063] ? lock_sync+0x190/0x190 [ 107.496068][ T5063] ? ptrace_stop.part.0+0x44a/0x930 [ 107.504144][ T5063] ? __fget_light+0x172/0x200 [ 107.513469][ T5063] __sys_sendmsg+0x117/0x1e0 [ 107.519191][ T5063] ? __sys_sendmsg_sock+0x30/0x30 [ 107.526904][ T5063] ? ptrace_notify+0xf1/0x130 [ 107.536577][ T5063] ? _raw_spin_unlock_irq+0x2e/0x50 [ 107.545887][ T5063] ? ptrace_notify+0xf1/0x130 [ 107.552199][ T5063] do_syscall_64+0xd0/0x250 [ 107.559203][ T5063] entry_SYSCALL_64_after_hwframe+0x62/0x6a [ 107.565671][ T5063] RIP: 0033:0x7fb7636be8b9 [ 107.570125][ T5063] 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 [ 107.594056][ T5063] RSP: 002b:00007ffcb373a118 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 107.606173][ T5063] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fb7636be8b9 [ 107.617485][ T5063] RDX: 0000000000000000 RSI: 00000000200001c0 RDI: 0000000000000003 [ 107.628684][ T5063] RBP: 0000000000000000 R08: 0000000000000000 R09: 00007ffcb373a190 [ 107.639021][ T5063] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 [ 107.648137][ T5063] R13: 00007ffcb373a318 R14: 0000000000000001 R15: 0000000000000001 [ 107.658902][ T5063] [ 107.666952][ T5063] Modules linked in: [ 107.672560][ T5063] CR2: 0000000000000000 [ 107.678012][ T5063] ---[ end trace 0000000000000000 ]--- [ 107.684039][ T5063] RIP: 0010:0x0 [ 107.687988][ T5063] Code: Unable to access opcode bytes at 0xffffffffffffffd6. [ 107.696090][ T5063] RSP: 0018:ffffc9000391f408 EFLAGS: 00010246 [ 107.702208][ T5063] RAX: dffffc0000000000 RBX: ffff888023901000 RCX: ffffffff889a5187 [ 107.710410][ T5063] RDX: 0000000000000000 RSI: 000000000000fff2 RDI: ffff888023901000 [ 107.718604][ T5063] RBP: ffffffff8f3b9260 R08: 0000000000000001 R09: 0000000000000000 [ 107.728641][ T5063] R10: 0000000000000001 R11: 00000000b2608160 R12: ffff88807b986000 [ 107.736955][ T5063] R13: ffffffff8beef640 R14: 0000000000000001 R15: ffffffff8f3b9260 [ 107.748337][ T5063] FS: 0000555556dad380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 107.761035][ T5063] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 107.768283][ T5063] CR2: ffffffffffffffd6 CR3: 00000000797bb000 CR4: 00000000003506f0 [ 107.781418][ T5063] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 107.795612][ T5063] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 107.807857][ T5063] Kernel panic - not syncing: Fatal exception [ 107.816883][ T5063] Kernel Offset: disabled [ 107.823489][ T5063] Rebooting in 86400 seconds..