./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2130999066 <...> Warning: Permanently added '10.128.1.167' (ED25519) to the list of known hosts. execve("./syz-executor2130999066", ["./syz-executor2130999066"], 0x7ffe98af0f90 /* 10 vars */) = 0 brk(NULL) = 0x555590fcd000 brk(0x555590fcdd00) = 0x555590fcdd00 arch_prctl(ARCH_SET_FS, 0x555590fcd380) = 0 set_tid_address(0x555590fcd650) = 5832 set_robust_list(0x555590fcd660, 24) = 0 rseq(0x555590fcdca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2130999066", 4096) = 28 getrandom("\xfb\xd9\x14\xd0\x07\x24\xa1\x5b", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555590fcdd00 brk(0x555590feed00) = 0x555590feed00 brk(0x555590fef000) = 0x555590fef000 mprotect(0x7fb46504c000, 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 executing program write(1, "executing program\n", 18) = 18 mmap(0x20000000, 11755520, PROT_WRITE|PROT_EXEC|PROT_SEM|PROT_GROWSUP|0xb635773f04ebbee0, MAP_SHARED|MAP_FIXED|MAP_ANONYMOUS|MAP_POPULATE, -1, 0) = 0x20000000 userfaultfd(UFFD_USER_MODE_ONLY|O_CLOEXEC) = 3 ioctl(3, UFFDIO_API, 0x200000c0) = 0 [ 72.805572][ T5832] [ 72.807931][ T5832] ============================================ [ 72.814061][ T5832] WARNING: possible recursive locking detected [ 72.820214][ T5832] 6.13.0-rc6-next-20250107-syzkaller #0 Not tainted [ 72.826805][ T5832] -------------------------------------------- [ 72.832939][ T5832] syz-executor213/5832 is trying to acquire lock: [ 72.839356][ T5832] ffff8880790b35c8 (vm_lock){++++}-{0:0}, at: move_pages+0x26b/0x1680 [ 72.847547][ T5832] [ 72.847547][ T5832] but task is already holding lock: [ 72.854899][ T5832] ffff8880790b3488 (vm_lock){++++}-{0:0}, at: uffd_lock_vma+0x20c/0x2c0 [ 72.863677][ T5832] [ 72.863677][ T5832] other info that might help us debug this: [ 72.871743][ T5832] Possible unsafe locking scenario: [ 72.871743][ T5832] [ 72.879182][ T5832] CPU0 [ 72.882453][ T5832] ---- [ 72.885738][ T5832] lock(vm_lock); [ 72.889454][ T5832] lock(vm_lock); [ 72.893170][ T5832] [ 72.893170][ T5832] *** DEADLOCK *** [ 72.893170][ T5832] [ 72.901299][ T5832] May be due to missing lock nesting notation [ 72.901299][ T5832] [ 72.909604][ T5832] 2 locks held by syz-executor213/5832: [ 72.915134][ T5832] #0: ffff8880790b3488 (vm_lock){++++}-{0:0}, at: uffd_lock_vma+0x20c/0x2c0 [ 72.923915][ T5832] #1: ffffffff8e937ee0 (rcu_read_lock){....}-{1:3}, at: lock_vma_under_rcu+0x1dd/0x9a0 [ 72.933652][ T5832] [ 72.933652][ T5832] stack backtrace: [ 72.939542][ T5832] CPU: 1 UID: 0 PID: 5832 Comm: syz-executor213 Not tainted 6.13.0-rc6-next-20250107-syzkaller #0 [ 72.939557][ T5832] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 72.939567][ T5832] Call Trace: [ 72.939573][ T5832] [ 72.939580][ T5832] dump_stack_lvl+0x241/0x360 [ 72.939595][ T5832] ? __pfx_dump_stack_lvl+0x10/0x10 [ 72.939608][ T5832] ? __pfx__printk+0x10/0x10 [ 72.939629][ T5832] ? lockdep_unlock+0x16a/0x300 [ 72.939648][ T5832] print_deadlock_bug+0x483/0x620 [ 72.939669][ T5832] ? lockdep_unlock+0x16a/0x300 [ 72.939685][ T5832] validate_chain+0x15e2/0x5920 [ 72.939712][ T5832] ? __pfx_validate_chain+0x10/0x10 [ 72.939732][ T5832] ? __pfx_validate_chain+0x10/0x10 [ 72.939753][ T5832] ? __pfx_validate_chain+0x10/0x10 [ 72.939773][ T5832] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 72.939790][ T5832] ? __pfx_validate_chain+0x10/0x10 [ 72.939810][ T5832] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 72.939828][ T5832] ? look_up_lock_class+0x77/0x170 [ 72.939845][ T5832] ? register_lock_class+0x102/0x980 [ 72.939863][ T5832] ? _raw_spin_unlock_irqrestore+0xdd/0x140 [ 72.939883][ T5832] ? __pfx_register_lock_class+0x10/0x10 [ 72.939899][ T5832] ? stack_trace_save+0x118/0x1d0 [ 72.939914][ T5832] ? mark_lock+0x9a/0x360 [ 72.939933][ T5832] __lock_acquire+0x1397/0x2100 [ 72.939955][ T5832] lock_acquire+0x1ed/0x550 [ 72.939972][ T5832] ? move_pages+0x26b/0x1680 [ 72.939986][ T5832] ? __pfx_lock_acquire+0x10/0x10 [ 72.940007][ T5832] ? mas_walk+0x1f3/0x280 [ 72.940027][ T5832] lock_vma_under_rcu+0x35f/0x9a0 [ 72.940042][ T5832] ? move_pages+0x26b/0x1680 [ 72.940054][ T5832] ? lock_vma_under_rcu+0x1dd/0x9a0 [ 72.940069][ T5832] ? move_pages+0x26b/0x1680 [ 72.940082][ T5832] ? __pfx_lock_vma_under_rcu+0x10/0x10 [ 72.940105][ T5832] ? uffd_lock_vma+0x22b/0x2c0 [ 72.940119][ T5832] move_pages+0x26b/0x1680 [ 72.940131][ T5832] ? __pfx___might_resched+0x10/0x10 [ 72.940146][ T5832] ? __might_fault+0xaa/0x120 [ 72.940163][ T5832] ? preempt_count_add+0x93/0x190 [ 72.940177][ T5832] ? __pfx_move_pages+0x10/0x10 [ 72.940189][ T5832] ? __might_fault+0xc6/0x120 [ 72.940206][ T5832] userfaultfd_ioctl+0x5221/0x6840 [ 72.940229][ T5832] ? __pfx_userfaultfd_ioctl+0x10/0x10 [ 72.940244][ T5832] ? stack_trace_save+0x118/0x1d0 [ 72.940258][ T5832] ? __pfx_stack_trace_save+0x10/0x10 [ 72.940272][ T5832] ? stack_depot_save_flags+0x37/0x940 [ 72.940291][ T5832] ? kasan_save_track+0x51/0x80 [ 72.940308][ T5832] ? kasan_save_track+0x3f/0x80 [ 72.940324][ T5832] ? kasan_save_free_info+0x40/0x50 [ 72.940338][ T5832] ? __kasan_slab_free+0x59/0x70 [ 72.940355][ T5832] ? kfree+0x196/0x430 [ 72.940366][ T5832] ? tomoyo_path_number_perm+0x679/0x860 [ 72.940380][ T5832] ? security_file_ioctl+0xc6/0x2a0 [ 72.940393][ T5832] ? __se_sys_ioctl+0x46/0x170 [ 72.940409][ T5832] ? do_syscall_64+0xf3/0x230 [ 72.940423][ T5832] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 72.940442][ T5832] ? do_vfs_ioctl+0xf07/0x2e40 [ 72.940461][ T5832] ? __pfx_do_vfs_ioctl+0x10/0x10 [ 72.940478][ T5832] ? mark_lock+0x9a/0x360 [ 72.940501][ T5832] ? tomoyo_path_number_perm+0x206/0x860 [ 72.940515][ T5832] ? __pfx_lock_release+0x10/0x10 [ 72.940533][ T5832] ? tomoyo_path_number_perm+0x679/0x860 [ 72.940548][ T5832] ? tomoyo_path_number_perm+0x679/0x860 [ 72.940563][ T5832] ? tomoyo_path_number_perm+0x6f9/0x860 [ 72.940578][ T5832] ? tomoyo_path_number_perm+0x206/0x860 [ 72.940592][ T5832] ? __pfx_tomoyo_path_number_perm+0x10/0x10 [ 72.940618][ T5832] ? __pfx_ptrace_notify+0x10/0x10 [ 72.940632][ T5832] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 72.940650][ T5832] ? __pfx_userfaultfd_ioctl+0x10/0x10 [ 72.940667][ T5832] __se_sys_ioctl+0xf5/0x170 [ 72.940684][ T5832] do_syscall_64+0xf3/0x230 [ 72.940699][ T5832] ? clear_bhb_loop+0x35/0x90 [ 72.940718][ T5832] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 72.940740][ T5832] RIP: 0033:0x7fb464fd9329 [ 72.940757][ T5832] Code: 48 83 c4 28 c3 e8 37 17 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 [ 72.940767][ T5832] RSP: 002b:00007ffd69c11768 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 72.940780][ T5832] RAX: ffffffffffffffda RBX: 00007ffd69c11938 RCX: 00007fb464fd9329 ioctl(3, _IOC(_IOC_READ|_IOC_WRITE, 0xaa, 0x5, 0x28), 0x20000040) = -1 EINVAL (Invalid argument) exit_group(0) = ? +++ exited with 0 +++ [ 72.940790][ T5832] RDX: 0000000020000040 RSI: 00000