./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4065687999

<...>
Warning: Permanently added '10.128.0.177' (ED25519) to the list of known hosts.
execve("./syz-executor4065687999", ["./syz-executor4065687999"], 0x7fff50f24310 /* 10 vars */) = 0
brk(NULL)                               = 0x555566ec9000
brk(0x555566ec9d00)                     = 0x555566ec9d00
arch_prctl(ARCH_SET_FS, 0x555566ec9380) = 0
set_tid_address(0x555566ec9650)         = 5848
set_robust_list(0x555566ec9660, 24)     = 0
rseq(0x555566ec9ca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor4065687999", 4096) = 28
getrandom("\x4a\x27\x1c\x5b\x8f\xe5\x2c\x91", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x555566ec9d00
brk(0x555566eead00)                     = 0x555566eead00
brk(0x555566eeb000)                     = 0x555566eeb000
mprotect(0x7fddd4328000, 16384, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
unshare(CLONE_NEWPID)                   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555566ec9650) = 5849
./strace-static-x86_64: Process 5849 attached
[pid  5849] set_robust_list(0x555566ec9660, 24) = 0
[pid  5849] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5849] getppid()                   = 0
[pid  5849] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid  5849] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid  5849] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid  5849] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid  5849] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid  5849] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid  5849] unshare(CLONE_NEWNS)        = 0
[pid  5849] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid  5849] unshare(CLONE_NEWIPC)       = 0
[pid  5849] unshare(CLONE_NEWCGROUP)    = 0
[pid  5849] unshare(CLONE_NEWUTS)       = 0
[pid  5849] unshare(CLONE_SYSVSEM)      = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "16777216", 8)     = 8
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "536870912", 9)    = 9
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "1024", 4)         = 4
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "8192", 4)         = 4
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "1024", 4)         = 4
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "1024", 4)         = 4
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "1024 1048576 500 1024", 21) = 21
[pid  5849] close(3)                    = 0
[pid  5849] getpid()                    = 1
[pid  5849] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  5849] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  5849] unshare(CLONE_NEWNET)       = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "0 65535", 7)      = 7
[pid  5849] close(3)                    = 0
[pid  5849] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid  5849] write(3, "100000", 6)       = 6
[pid  5849] close(3)                    = 0
[pid  5849] mkdir("./syz-tmp", 0777)    = 0
[pid  5849] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid  5849] mkdir("./syz-tmp/newroot", 0777) = 0
[pid  5849] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid  5849] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5849] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid  5849] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid  5849] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid  5849] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5849] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5849] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid  5849] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5849] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5849] mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5849] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5849] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid  5849] mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL, MS_RDONLY|MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5849] mkdir("./syz-tmp/pivot", 0777) = 0
[pid  5849] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid  5849] chdir("/")                  = 0
[pid  5849] umount2("./pivot", MNT_DETACH) = 0
[pid  5849] chroot("./newroot")         = 0
[pid  5849] chdir("/")                  = 0
[pid  5849] mkdir("/dev/gadgetfs", 0777) = 0
[pid  5849] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = 0
[pid  5849] mkdir("/dev/binderfs", 0777) = 0
[pid  5849] mount("binder", "/dev/binderfs", "binder", 0, NULL) = 0
[pid  5849] symlink("/dev/binderfs", "./binderfs") = 0
[pid  5849] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid  5849] write(1, "executing program\n", 18executing program
) = 18
[pid  5849] bpf(BPF_MAP_CREATE, {map_type=BPF_MAP_TYPE_RINGBUF, key_size=0, value_size=0, max_entries=32768, map_flags=0, inner_map_fd=-1, map_name="", map_ifindex=0, btf_fd=-1, btf_key_type_id=0, btf_value_type_id=0, btf_vmlinux_value_type_id=0, map_extra=0}, 72) = 3
[pid  5849] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_UNSPEC, insn_cnt=12, insns=0x200000000440, license=NULL, log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=0, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 144) = -1 EFAULT (Bad address)
[pid  5849] bpf(BPF_PROG_LOAD, {prog_type=BPF_PROG_TYPE_SYSCALL, insn_cnt=12, insns=0x200000000440, license="GPL", log_level=0, log_size=0, log_buf=NULL, kern_version=KERNEL_VERSION(0, 0, 0), prog_flags=BPF_F_ANY_ALIGNMENT|BPF_F_TEST_STATE_FREQ|BPF_F_SLEEPABLE, prog_name="", prog_ifindex=0, expected_attach_type=BPF_CGROUP_INET_INGRESS, prog_btf_fd=-1, func_info_rec_size=0, func_info=NULL, func_info_cnt=0, line_info_rec_size=0, line_info=NULL, line_info_cnt=0, attach_btf_id=0, attach_prog_fd=0, fd_array=NULL}, 144) = 4
[   90.080858][ T5849] 
[   90.083314][ T5849] =============================
[   90.088279][ T5849] WARNING: suspicious RCU usage
[   90.093166][ T5849] 6.16.0-rc5-syzkaller-00187-gb640daa2822a #0 Not tainted
[   90.100432][ T5849] -----------------------------
[   90.105433][ T5849] kernel/events/callchain.c:163 suspicious rcu_dereference_check() usage!
[   90.114028][ T5849] 
[   90.114028][ T5849] other info that might help us debug this:
[   90.114028][ T5849] 
[   90.125093][ T5849] 
[pid  5849] bpf(BPF_PROG_TEST_RUN, {test={prog_fd=4, retval=4294967295, data_size_in=0, data_size_out=0, data_in=NULL, data_out=NULL, repeat=0, duration=0}}, 12) = 0
[pid  5849] exit_group(1)               = ?
[   90.125093][ T5849] rcu_scheduler_active = 2, debug_locks = 1
[   90.133199][ T5849] 1 lock held by syz-executor406/5849:
[   90.138720][ T5849]  #0: ffffffff8e13f340 (rcu_read_lock_trace){....}-{0:0}, at: rcu_read_lock_trace+0x38/0x80
[   90.149118][ T5849] 
[   90.149118][ T5849] stack backtrace:
[   90.155077][ T5849] CPU: 0 UID: 0 PID: 5849 Comm: syz-executor406 Not tainted 6.16.0-rc5-syzkaller-00187-gb640daa2822a #0 PREEMPT(full) 
[   90.155101][ T5849] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[   90.155118][ T5849] Call Trace:
[   90.155125][ T5849]  <TASK>
[   90.155132][ T5849]  dump_stack_lvl+0x189/0x250
[   90.155163][ T5849]  ? __pfx_dump_stack_lvl+0x10/0x10
[   90.155185][ T5849]  ? __pfx__printk+0x10/0x10
[   90.155222][ T5849]  lockdep_rcu_suspicious+0x140/0x1d0
[   90.155249][ T5849]  get_callchain_entry+0x2b6/0x3c0
[   90.155282][ T5849]  get_perf_callchain+0xa1/0x6b0
[   90.155314][ T5849]  ? __pfx_get_perf_callchain+0x10/0x10
[   90.155353][ T5849]  __bpf_get_stack+0x3fc/0xa60
[   90.155393][ T5849]  ? __pfx___bpf_get_stack+0x10/0x10
[   90.155415][ T5849]  ? __lock_acquire+0xab9/0xd20
[   90.155443][ T5849]  bpf_get_stack+0x33/0x50
[   90.155461][ T5849]  ? bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e
[   90.155485][ T5849]  bpf_get_stack_raw_tp+0x1a9/0x220
[   90.155518][ T5849]  bpf_prog_b8a90dd1efcc4ad9+0x46/0x4e
[   90.155535][ T5849]  bpf_prog_run_pin_on_cpu+0x67/0x150
[   90.155564][ T5849]  bpf_prog_test_run_syscall+0x312/0x4b0
[   90.155593][ T5849]  ? __pfx_bpf_prog_test_run_syscall+0x10/0x10
[   90.155625][ T5849]  ? __pfx_bpf_prog_test_run_syscall+0x10/0x10
[   90.155652][ T5849]  bpf_prog_test_run+0x2c4/0x340
[   90.155676][ T5849]  __sys_bpf+0x4a4/0x860
[   90.155696][ T5849]  ? __pfx___sys_bpf+0x10/0x10
[   90.155733][ T5849]  ? rcu_is_watching+0x15/0xb0
[   90.155765][ T5849]  __x64_sys_bpf+0x7c/0x90
[   90.155794][ T5849]  do_syscall_64+0xfa/0x3b0
[   90.155818][ T5849]  ? lockdep_hardirqs_on+0x9c/0x150
[   90.155848][ T5849]  ? entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.155867][ T5849]  ? clear_bhb_loop+0x60/0xb0
[   90.155891][ T5849]  entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   90.155909][ T5849] RIP: 0033:0x7fddd42b4c39
[   90.155926][ T5849] Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 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
[   90.155947][ T5849] RSP: 002b:00007fff7bbc4818 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
[   90.155968][ T5849] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fddd42b4c39
[pid  5849] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5849, si_uid=0, si_status=1, si_utime=0, si_stime=16 /* 0.16 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[   90.155981][ T5849] RDX: 000000000000000c RSI: 00002000000004c0