./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor683178681 <...> Warning: Permanently added '10.128.1.144' (ED25519) to the list of known hosts. execve("./syz-executor683178681", ["./syz-executor683178681"], 0x7ffdf4605140 /* 10 vars */) = 0 brk(NULL) = 0x555555f2c000 brk(0x555555f2cd40) = 0x555555f2cd40 arch_prctl(ARCH_SET_FS, 0x555555f2c3c0) = 0 set_tid_address(0x555555f2c690) = 5007 set_robust_list(0x555555f2c6a0, 24) = 0 rseq(0x555555f2cce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor683178681", 4096) = 27 getrandom("\x1d\x55\xa9\x74\x7d\xf2\xa5\x41", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555f2cd40 brk(0x555555f4dd40) = 0x555555f4dd40 brk(0x555555f4e000) = 0x555555f4e000 mprotect(0x7f3f5f103000, 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 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5008 attached , child_tidptr=0x555555f2c690) = 5008 [pid 5008] set_robust_list(0x555555f2c6a0, 24) = 0 [pid 5008] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5008] setpgid(0, 0) = 0 [pid 5008] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5008] write(3, "1000", 4) = 4 [pid 5008] close(3) = 0 [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5008] rt_sigaction(SIGRT_1, {sa_handler=0x7f3f5f0a63b0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f3f5f097a30}, NULL, 8) = 0 [pid 5008] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5008] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3f5f020000 [pid 5008] mprotect(0x7f3f5f021000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5008] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5008] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3f5f040990, parent_tid=0x7f3f5f040990, exit_signal=0, stack=0x7f3f5f020000, stack_size=0x20300, tls=0x7f3f5f0406c0}./strace-static-x86_64: Process 5009 attached => {parent_tid=[5009]}, 88) = 5009 [pid 5008] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5008] futex(0x7f3f5f109368, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5009] rseq(0x7f3f5f040fe0, 0x20, 0, 0x53053053) = 0 [pid 5009] set_robust_list(0x7f3f5f0409a0, 24) = 0 [pid 5009] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5009] openat(AT_FDCWD, "/dev/virtual_nci", O_RDWR) = 3 [pid 5009] futex(0x7f3f5f10936c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5009] futex(0x7f3f5f109368, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5008] <... futex resumed>) = 0 [pid 5008] futex(0x7f3f5f109368, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5009] <... futex resumed>) = 0 [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5009] ioctl(3, _IOC(_IOC_NONE, 0, 0, 0), 0x200000c0) = 0 [pid 5009] futex(0x7f3f5f10936c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5008] <... futex resumed>) = 0 [pid 5008] futex(0x7f3f5f109368, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5009] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5009] <... socket resumed>) = 4 [pid 5009] futex(0x7f3f5f10936c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5008] <... futex resumed>) = 0 [pid 5008] futex(0x7f3f5f109368, FUTEX_WAKE_PRIVATE, 1000000 [pid 5009] sendto(4, [{nlmsg_len=28, nlmsg_type=0x10 /* NLMSG_??? */, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}, "\x03\x00\x00\x00\x08\x00\x02\x00\x6e\x66\x63\x00"], 28, 0, {sa_family=AF_NETLINK, nl_pid=0, nl_groups=00000000}, 12 [pid 5008] <... futex resumed>) = 0 [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5009] <... sendto resumed>) = 28 [pid 5009] recvfrom(4, [{nlmsg_len=472, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=5008}, "\x01\x02\x00\x00\x08\x00\x02\x00\x6e\x66\x63\x00\x06\x00\x01\x00\x1e\x00\x00\x00\x08\x00\x03\x00\x01\x00\x00\x00\x08\x00\x04\x00\x00\x00\x00\x00\x08\x00\x05\x00\x1f\x00\x00\x00\x80\x01\x06\x00\x14\x00\x01\x00\x08\x00\x01\x00\x01\x00\x00\x00\x08\x00\x02\x00\x0e\x00\x00\x00\x14\x00\x02\x00\x08\x00\x01\x00\x02\x00\x00\x00\x08\x00\x02\x00\x0b\x00\x00\x00\x14\x00\x03\x00\x08\x00\x01\x00\x03\x00\x00\x00"...], 4096, 0, NULL, NULL) = 472 [pid 5009] recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5008}, {error=0, msg={nlmsg_len=28, nlmsg_type=nlctrl, nlmsg_flags=NLM_F_REQUEST|NLM_F_ACK, nlmsg_seq=0, nlmsg_pid=0}}], 4096, 0, NULL, NULL) = 36 [pid 5009] futex(0x7f3f5f10936c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5008] <... futex resumed>) = 0 [pid 5009] sendmsg(4, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x1c\x00\x00\x00\x1e\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x08\x00\x01\x00\x02\x00\x00\x00", iov_len=28}], msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0 [pid 5008] futex(0x7f3f5f109368, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5008] futex(0x7f3f5f10936c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000}) = -1 ETIMEDOUT (Connection timed out) [pid 5008] futex(0x7f3f5f10937c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5008] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f3f5efff000 [pid 5008] mprotect(0x7f3f5f000000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5008] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5008] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f3f5f01f990, parent_tid=0x7f3f5f01f990, exit_signal=0, stack=0x7f3f5efff000, stack_size=0x20300, tls=0x7f3f5f01f6c0}./strace-static-x86_64: Process 5014 attached [pid 5014] rseq(0x7f3f5f01ffe0, 0x20, 0, 0x53053053) = 0 [pid 5014] set_robust_list(0x7f3f5f01f9a0, 24) = 0 [pid 5014] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5014] futex(0x7f3f5f109378, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5008] <... clone3 resumed> => {parent_tid=[5014]}, 88) = 5014 [pid 5008] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5008] futex(0x7f3f5f109378, FUTEX_WAKE_PRIVATE, 1000000 [pid 5014] <... futex resumed>) = 0 [pid 5008] <... futex resumed>) = 1 [pid 5014] write(3, NULL, 0) = 0 [pid 5008] futex(0x7f3f5f10937c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5014] futex(0x7f3f5f10937c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5008] <... futex resumed>) = 0 [ 146.382949][ T2933] ===================================================== [ 146.390184][ T2933] BUG: KMSAN: uninit-value in nci_rx_work+0x2e6/0x500 [ 146.397310][ T2933] nci_rx_work+0x2e6/0x500 [ 146.402036][ T2933] process_scheduled_works+0x104e/0x1e70 [ 146.407862][ T2933] worker_thread+0xf45/0x1490 [ 146.412829][ T2933] kthread+0x3ed/0x540 [ 146.417075][ T2933] ret_from_fork+0x66/0x80 [ 146.421847][ T2933] ret_from_fork_asm+0x11/0x20 [ 146.426792][ T2933] [ 146.429191][ T2933] Uninit was created at: [ 146.433748][ T2933] slab_post_alloc_hook+0x129/0xa70 [ 146.439108][ T2933] kmem_cache_alloc_node+0x5e9/0xb10 [ 146.444659][ T2933] kmalloc_reserve+0x13d/0x4a0 [ 146.449610][ T2933] __alloc_skb+0x318/0x740 [ 146.454335][ T2933] virtual_ncidev_write+0x6d/0x280 [ 146.459612][ T2933] vfs_write+0x48b/0x1200 [ 146.464258][ T2933] ksys_write+0x20f/0x4c0 [ 146.468734][ T2933] __x64_sys_write+0x93/0xd0 [ 146.473671][ T2933] do_syscall_64+0x6d/0x140 [ 146.478356][ T2933] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 146.484612][ T2933] [ 146.487021][ T2933] CPU: 1 PID: 2933 Comm: kworker/u4:11 Not tainted 6.7.0-syzkaller-00562-g9f8413c4a66f #0 [ 146.497225][ T2933] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 146.507527][ T2933] Workqueue: nfc2_nci_rx_wq nci_rx_work [ 146.513364][ T2933] ===================================================== [ 146.520388][ T2933] Disabling lock debugging due to kernel taint [ 146.526736][ T2933] Kernel panic - not syncing: kmsan.panic set ... [ 146.533253][ T2933] CPU: 1 PID: 2933 Comm: kworker/u4:11 Tainted: G B 6.7.0-syzkaller-00562-g9f8413c4a66f #0 [ 146.544764][ T2933] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 146.554885][ T2933] Workqueue: nfc2_nci_rx_wq nci_rx_work [ 146.560573][ T2933] Call Trace: [ 146.563943][ T2933] [ 146.566947][ T2933] dump_stack_lvl+0x1bf/0x240 [ 146.571735][ T2933] dump_stack+0x1e/0x20 [ 146.576005][ T2933] panic+0x4de/0xc90 [ 146.580067][ T2933] ? add_taint+0x108/0x1a0 [pid 5014] futex(0x7f3f5f109378, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5008] exit_group(0 [pid 5014] <... futex resumed>) = ? [pid 5008] <... exit_group resumed>) = ? [pid 5009] <... sendmsg resumed>) = ? [pid 5014] +++ exited with 0 +++ [ 146.584630][ T2933] kmsan_report+0x2d0/0x2d0 [ 146.589266][ T2933] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 146.595276][ T2933] ? _raw_spin_lock_irqsave+0x35/0xc0 [ 146.600827][ T2933] ? __msan_warning+0x96/0x110 [ 146.605771][ T2933] ? nci_rx_work+0x2e6/0x500 [ 146.606345][ T5009] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 146.619272][ T2933] ? process_scheduled_works+0x104e/0x1e70 [ 146.625256][ T2933] ? worker_thread+0xf45/0x1490 [ 146.630265][ T2933] ? kthread+0x3ed/0x540 [ 146.634666][ T2933] ? ret_from_fork+0x66/0x80 [ 146.639386][ T2933] ? ret_from_fork_asm+0x11/0x20 [ 146.644512][ T2933] ? filter_irq_stacks+0x60/0x1a0 [ 146.649702][ T2933] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 146.656058][ T2933] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 146.662255][ T2933] ? kfree_skb_reason+0x191/0x4f0 [ 146.667401][ T2933] ? nfc_send_to_raw_sock+0x504/0x520 [ 146.672915][ T2933] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 146.678929][ T2933] __msan_warning+0x96/0x110 [ 146.683710][ T2933] nci_rx_work+0x2e6/0x500 [ 146.688329][ T2933] ? nci_cmd_work+0x480/0x480 [ 146.693204][ T2933] process_scheduled_works+0x104e/0x1e70 [ 146.698996][ T2933] worker_thread+0xf45/0x1490 [ 146.703863][ T2933] kthread+0x3ed/0x540 [ 146.708120][ T2933] ? pr_cont_work+0xce0/0xce0 [ 146.712942][ T2933] ? kthread_blkcg+0x120/0x120 [ 146.717818][ T2933] ret_from_fork+0x66/0x80 [ 146.722340][ T2933] ? kthread_blkcg+0x120/0x120 [ 146.727251][ T2933] ret_from_fork_asm+0x11/0x20 [ 146.732210][ T2933] [ 146.735566][ T2933] Kernel Offset: disabled [ 146.739935][ T2933] Rebooting in 86400 seconds..