./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor175347119 <...> Warning: Permanently added '10.128.1.89' (ED25519) to the list of known hosts. execve("./syz-executor175347119", ["./syz-executor175347119"], 0x7ffef69dde30 /* 10 vars */) = 0 brk(NULL) = 0x555557061000 brk(0x555557061d40) = 0x555557061d40 arch_prctl(ARCH_SET_FS, 0x5555570613c0) = 0 set_tid_address(0x555557061690) = 5006 set_robust_list(0x5555570616a0, 24) = 0 rseq(0x555557061ce0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor175347119", 4096) = 27 getrandom("\x61\x1a\xb6\x34\x3e\x49\xa8\xf1", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555557061d40 brk(0x555557082d40) = 0x555557082d40 brk(0x555557083000) = 0x555557083000 mprotect(0x7f927927d000, 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, child_tidptr=0x555557061690) = 5007 ./strace-static-x86_64: Process 5007 attached [pid 5007] set_robust_list(0x5555570616a0, 24) = 0 [pid 5007] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 5007] setpgid(0, 0) = 0 [pid 5007] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5007] write(3, "1000", 4) = 4 [pid 5007] close(3) = 0 [pid 5007] futex(0x7f927928336c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5007] rt_sigaction(SIGRT_1, {sa_handler=0x7f92792203b0, sa_mask=[], sa_flags=SA_RESTORER|SA_ONSTACK|SA_RESTART|SA_SIGINFO, sa_restorer=0x7f9279211a30}, NULL, 8) = 0 [pid 5007] rt_sigprocmask(SIG_UNBLOCK, [RTMIN RT_1], NULL, 8) = 0 [pid 5007] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f927919a000 [pid 5007] mprotect(0x7f927919b000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5007] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5007] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f92791ba990, parent_tid=0x7f92791ba990, exit_signal=0, stack=0x7f927919a000, stack_size=0x20300, tls=0x7f92791ba6c0} => {parent_tid=[5008]}, 88) = 5008 [pid 5007] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5007] futex(0x7f9279283368, FUTEX_WAKE_PRIVATE, 1000000) = 0 ./strace-static-x86_64: Process 5008 attached [pid 5007] futex(0x7f927928336c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5008] rseq(0x7f92791bafe0, 0x20, 0, 0x53053053) = 0 [pid 5008] set_robust_list(0x7f92791ba9a0, 24) = 0 [pid 5008] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5008] openat(AT_FDCWD, "/dev/virtual_nci", O_RDWR) = 3 [pid 5008] futex(0x7f927928336c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5007] <... futex resumed>) = 0 [pid 5007] futex(0x7f9279283368, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5007] futex(0x7f927928336c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5008] ioctl(3, _IOC(_IOC_NONE, 0, 0, 0), 0x200000c0) = 0 [pid 5008] futex(0x7f927928336c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5007] <... futex resumed>) = 0 [pid 5008] socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC [pid 5007] futex(0x7f9279283368, FUTEX_WAKE_PRIVATE, 1000000 [pid 5008] <... socket resumed>) = 4 [pid 5007] <... futex resumed>) = 0 [pid 5007] futex(0x7f927928336c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5008] futex(0x7f927928336c, FUTEX_WAKE_PRIVATE, 1000000 [pid 5007] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5008] <... futex resumed>) = 0 [pid 5008] futex(0x7f9279283368, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5007] futex(0x7f9279283368, FUTEX_WAKE_PRIVATE, 1000000 [pid 5008] <... futex resumed>) = -1 EAGAIN (Resource temporarily unavailable) [pid 5007] <... futex resumed>) = 0 [pid 5008] 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 5007] futex(0x7f927928336c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5008] <... sendto resumed>) = 28 [pid 5008] recvfrom(4, [{nlmsg_len=472, nlmsg_type=nlctrl, nlmsg_flags=0, nlmsg_seq=0, nlmsg_pid=5007}, "\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 5008] recvfrom(4, [{nlmsg_len=36, nlmsg_type=NLMSG_ERROR, nlmsg_flags=NLM_F_CAPPED, nlmsg_seq=0, nlmsg_pid=5007}, {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 5008] futex(0x7f927928336c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5007] <... futex resumed>) = 0 [pid 5007] futex(0x7f9279283368, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5007] futex(0x7f927928336c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5008] 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 5007] <... futex resumed>) = -1 ETIMEDOUT (Connection timed out) [pid 5007] futex(0x7f927928337c, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5007] mmap(NULL, 135168, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS|MAP_STACK, -1, 0) = 0x7f9279179000 [pid 5007] mprotect(0x7f927917a000, 131072, PROT_READ|PROT_WRITE) = 0 [pid 5007] rt_sigprocmask(SIG_BLOCK, ~[], [], 8) = 0 [pid 5007] clone3({flags=CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_SETTLS|CLONE_PARENT_SETTID|CLONE_CHILD_CLEARTID, child_tid=0x7f9279199990, parent_tid=0x7f9279199990, exit_signal=0, stack=0x7f9279179000, stack_size=0x20300, tls=0x7f92791996c0} => {parent_tid=[5013]}, 88) = 5013 ./strace-static-x86_64: Process 5013 attached [pid 5007] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5007] futex(0x7f9279283378, FUTEX_WAKE_PRIVATE, 1000000) = 0 [pid 5007] futex(0x7f927928337c, FUTEX_WAIT_PRIVATE, 0, {tv_sec=0, tv_nsec=50000000} [pid 5013] rseq(0x7f9279199fe0, 0x20, 0, 0x53053053) = 0 [pid 5013] set_robust_list(0x7f92791999a0, 24) = 0 [pid 5013] rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 [pid 5013] write(3, NULL, 0) = 0 [pid 5013] futex(0x7f927928337c, FUTEX_WAKE_PRIVATE, 1000000) = 1 [pid 5013] futex(0x7f9279283378, FUTEX_WAIT_PRIVATE, 0, NULL [pid 5007] <... futex resumed>) = 0 [ 143.642949][ T743] ===================================================== [ 143.650179][ T743] BUG: KMSAN: uninit-value in nci_rx_work+0x2e6/0x500 [ 143.657565][ T743] nci_rx_work+0x2e6/0x500 [ 143.662294][ T743] process_scheduled_works+0x104e/0x1e70 [ 143.668100][ T743] worker_thread+0xf45/0x1490 [ 143.673091][ T743] kthread+0x3ed/0x540 [ 143.677337][ T743] ret_from_fork+0x66/0x80 [ 143.682127][ T743] ret_from_fork_asm+0x11/0x20 [ 143.687073][ T743] [ 143.689643][ T743] Uninit was created at: [ 143.694189][ T743] slab_post_alloc_hook+0x129/0xa70 [ 143.699628][ T743] kmem_cache_alloc_node+0x5e9/0xb10 [ 143.705316][ T743] kmalloc_reserve+0x13d/0x4a0 [ 143.710436][ T743] __alloc_skb+0x318/0x740 [ 143.715190][ T743] virtual_ncidev_write+0x6d/0x280 [ 143.720464][ T743] vfs_write+0x561/0x1490 [ 143.725167][ T743] ksys_write+0x20f/0x4c0 [ 143.729745][ T743] __x64_sys_write+0x93/0xd0 [ 143.734913][ T743] do_syscall_64+0x44/0x110 [ 143.739613][ T743] entry_SYSCALL_64_after_hwframe+0x63/0x6b [ 143.746297][ T743] [ 143.748710][ T743] CPU: 0 PID: 743 Comm: kworker/u4:5 Not tainted 6.7.0-rc7-syzkaller #0 [ 143.757427][ T743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 143.767764][ T743] Workqueue: nfc2_nci_rx_wq nci_rx_work [ 143.773568][ T743] ===================================================== [ 143.780599][ T743] Disabling lock debugging due to kernel taint [ 143.786991][ T743] Kernel panic - not syncing: kmsan.panic set ... [ 143.793645][ T743] CPU: 0 PID: 743 Comm: kworker/u4:5 Tainted: G B 6.7.0-rc7-syzkaller #0 [ 143.803603][ T743] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 [ 143.813797][ T743] Workqueue: nfc2_nci_rx_wq nci_rx_work [ 143.819926][ T743] Call Trace: [ 143.823284][ T743] [ 143.826280][ T743] dump_stack_lvl+0x1bf/0x240 [ 143.831146][ T743] dump_stack+0x1e/0x20 [ 143.835467][ T743] panic+0x4de/0xc90 [ 143.839567][ T743] ? add_taint+0x108/0x1a0 [pid 5007] exit_group(0) = ? [pid 5013] <... futex resumed>) = ? [pid 5013] +++ exited with 0 +++ [pid 5008] <... sendmsg resumed>) = ? [ 143.844156][ T743] kmsan_report+0x2d0/0x2d0 [ 143.848858][ T743] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 143.854959][ T743] ? _raw_spin_lock_irqsave+0x35/0xc0 [ 143.860573][ T743] ? __msan_warning+0x96/0x110 [ 143.865594][ T743] ? nci_rx_work+0x2e6/0x500 [ 143.869326][ T5008] nci: __nci_request: wait_for_completion_interruptible_timeout failed -512 [ 143.879104][ T743] ? process_scheduled_works+0x104e/0x1e70 [ 143.885182][ T743] ? worker_thread+0xf45/0x1490 [ 143.890218][ T743] ? kthread+0x3ed/0x540 [ 143.894653][ T743] ? ret_from_fork+0x66/0x80 [ 143.899409][ T743] ? ret_from_fork_asm+0x11/0x20 [ 143.904482][ T743] ? filter_irq_stacks+0x60/0x1a0 [ 143.909699][ T743] ? kmsan_internal_set_shadow_origin+0x66/0xe0 [ 143.916230][ T743] ? kmsan_internal_unpoison_memory+0x14/0x20 [ 143.922587][ T743] ? kfree_skb_reason+0x191/0x4f0 [ 143.927902][ T743] ? nfc_send_to_raw_sock+0x504/0x520 [ 143.933425][ T743] ? kmsan_get_shadow_origin_ptr+0x4d/0xa0 [ 143.939470][ T743] __msan_warning+0x96/0x110 [ 143.944338][ T743] nci_rx_work+0x2e6/0x500 [ 143.949006][ T743] ? nci_cmd_work+0x480/0x480 [ 143.954231][ T743] process_scheduled_works+0x104e/0x1e70 [ 143.960028][ T743] worker_thread+0xf45/0x1490 [ 143.964862][ T743] kthread+0x3ed/0x540 [ 143.969059][ T743] ? pr_cont_work+0xce0/0xce0 [ 143.973840][ T743] ? kthread_blkcg+0x120/0x120 [ 143.978728][ T743] ret_from_fork+0x66/0x80 [ 143.983308][ T743] ? kthread_blkcg+0x120/0x120 [ 143.988281][ T743] ret_from_fork_asm+0x11/0x20 [ 143.993222][ T743] [ 143.996663][ T743] Kernel Offset: disabled [ 144.001661][ T743] Rebooting in 86400 seconds..