./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4104643601 <...> [ 76.644136][ T25] cfg80211: failed to load regulatory.db Warning: Permanently added '10.128.0.139' (ED25519) to the list of known hosts. execve("./syz-executor4104643601", ["./syz-executor4104643601"], 0x7fff46050460 /* 10 vars */) = 0 brk(NULL) = 0x555576397000 brk(0x555576397e00) = 0x555576397e00 arch_prctl(ARCH_SET_FS, 0x555576397480) = 0 set_tid_address(0x555576397750) = 5235 set_robust_list(0x555576397760, 24) = 0 rseq(0x555576397da0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor4104643601", 4096) = 28 getrandom("\x16\x31\xbb\x87\xca\x45\xb2\xae", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555576397e00 brk(0x5555763b8e00) = 0x5555763b8e00 brk(0x5555763b9000) = 0x5555763b9000 mprotect(0x7fbb4c65c000, 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 rt_sigaction(SIGRTMIN, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGRT_1, {sa_handler=SIG_IGN, sa_mask=[], sa_flags=0}, NULL, 8) = 0 rt_sigaction(SIGSEGV, {sa_handler=0x7fbb4c5b5e50, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fbb4c5bd1a0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7fbb4c5b5e50, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7fbb4c5bd1a0}, NULL, 8) = 0 write(1, "executing program\n", 18executing program ) = 18 mkdir("./file0", 0777) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- mkdirat(AT_FDCWD, "./file1", 000) = 0 mkdir("./bus", 000) = 0 mount(NULL, "./bus", "overlay", 0, "workdir=./bus,lowerdir=./file0,upperdir=./file1,") = 0 chdir("./bus") = 0 openat(AT_FDCWD, ".", O_WRONLY|O_SYNC|O_DIRECT|O_TMPFILE, 000) = 3 exit_group(0) = ? [ 77.482102][ T5235] Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN PTI [ 77.494697][ T5235] KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] [ 77.503097][ T5235] CPU: 1 UID: 0 PID: 5235 Comm: syz-executor410 Not tainted 6.12.0-rc2-next-20241011-syzkaller #0 [ 77.513657][ T5235] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 77.523687][ T5235] RIP: 0010:ovl_real_file_path+0xa5/0x2e0 [ 77.529409][ T5235] Code: 03 4d 89 f7 42 80 3c 30 00 74 08 4c 89 ef e8 22 1e e0 fe 4c 89 64 24 10 49 8b 45 00 49 89 c4 4c 8d 70 68 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 fc 1d e0 fe 49 8b 1e 48 83 c5 68 [ 77.548990][ T5235] RSP: 0018:ffffc90002dcfb28 EFLAGS: 00010202 [ 77.555033][ T5235] RAX: 000000000000000d RBX: 1ffff920005b9f79 RCX: ffff88801efa5a00 [ 77.562985][ T5235] RDX: 0000000000000000 RSI: ffffc90002dcfbc0 RDI: ffff888031c9bc00 [ 77.570934][ T5235] RBP: ffff88807eb938f8 R08: ffffffff831d82d9 R09: 0000000000000000 [ 77.578882][ T5235] R10: ffffc90002dcfae0 R11: fffff520005b9f5e R12: 0000000000000000 [ 77.586847][ T5235] R13: ffff888078c80000 R14: 0000000000000068 R15: dffffc0000000000 [ 77.594799][ T5235] FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 77.603718][ T5235] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.610276][ T5235] CR2: 0000000020001740 CR3: 000000000e736000 CR4: 00000000003526f0 [ 77.618226][ T5235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.626173][ T5235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.634121][ T5235] Call Trace: [ 77.637383][ T5235] [ 77.640292][ T5235] ? __die_body+0x5f/0xb0 [ 77.644601][ T5235] ? die_addr+0xb0/0xe0 [ 77.648732][ T5235] ? exc_general_protection+0x3dd/0x5d0 [ 77.654268][ T5235] ? asm_exc_general_protection+0x26/0x30 [ 77.659968][ T5235] ? ovl_path_realdata+0x79/0x370 [ 77.664970][ T5235] ? ovl_real_file_path+0xa5/0x2e0 [ 77.670061][ T5235] ? ovl_real_file_path+0x23/0x2e0 [ 77.675152][ T5235] ovl_real_file+0x186/0x210 [ 77.679721][ T5235] ? __pfx_ovl_real_file+0x10/0x10 [ 77.684812][ T5235] ? __pfx_task_work_add+0x10/0x10 [ 77.689901][ T5235] ovl_flush+0x22/0x140 [ 77.694034][ T5235] ? filp_flush+0xab/0x160 [ 77.698450][ T5235] ? __pfx_ovl_flush+0x10/0x10 [ 77.703189][ T5235] filp_flush+0xb7/0x160 [ 77.707426][ T5235] filp_close+0x1e/0x40 [ 77.711561][ T5235] put_files_struct+0x198/0x310 [ 77.716392][ T5235] do_exit+0xa10/0x28e0 [ 77.720527][ T5235] ? __pfx_do_exit+0x10/0x10 [ 77.725093][ T5235] ? lockdep_hardirqs_on_prepare+0x43d/0x780 [ 77.731056][ T5235] ? __pfx_lockdep_hardirqs_on_prepare+0x10/0x10 [ 77.737367][ T5235] ? _raw_spin_unlock_irq+0x23/0x50 [ 77.742543][ T5235] ? lockdep_hardirqs_on+0x99/0x150 [ 77.747720][ T5235] do_group_exit+0x207/0x2c0 [ 77.752303][ T5235] __x64_sys_exit_group+0x3f/0x40 [ 77.757304][ T5235] x64_sys_call+0x2634/0x2640 [ 77.761966][ T5235] do_syscall_64+0xf3/0x230 [ 77.766454][ T5235] ? clear_bhb_loop+0x35/0x90 [ 77.771106][ T5235] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 77.776979][ T5235] RIP: 0033:0x7fbb4c5e7739 [ 77.781377][ T5235] Code: Unable to access opcode bytes at 0x7fbb4c5e770f. [ 77.788369][ T5235] RSP: 002b:00007fff9c70aac8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 77.796757][ T5235] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fbb4c5e7739 [ 77.804704][ T5235] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 [ 77.812653][ T5235] RBP: 00007fbb4c662290 R08: ffffffffffffffb8 R09: 00007fbb4c5b5e50 [ 77.820600][ T5235] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fbb4c662290 [ 77.828550][ T5235] R13: 0000000000000000 R14: 00007fbb4c662ce0 R15: 00007fbb4c5b62a0 [ 77.836501][ T5235] [ 77.839513][ T5235] Modules linked in: [ 77.843536][ T5235] ---[ end trace 0000000000000000 ]--- [ 77.849072][ T5235] RIP: 0010:ovl_real_file_path+0xa5/0x2e0 [ 77.854854][ T5235] Code: 03 4d 89 f7 42 80 3c 30 00 74 08 4c 89 ef e8 22 1e e0 fe 4c 89 64 24 10 49 8b 45 00 49 89 c4 4c 8d 70 68 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 fc 1d e0 fe 49 8b 1e 48 83 c5 68 [ 77.874557][ T5235] RSP: 0018:ffffc90002dcfb28 EFLAGS: 00010202 [ 77.880626][ T5235] RAX: 000000000000000d RBX: 1ffff920005b9f79 RCX: ffff88801efa5a00 [ 77.888731][ T5235] RDX: 0000000000000000 RSI: ffffc90002dcfbc0 RDI: ffff888031c9bc00 [ 77.896755][ T5235] RBP: ffff88807eb938f8 R08: ffffffff831d82d9 R09: 0000000000000000 [ 77.904756][ T5235] R10: ffffc90002dcfae0 R11: fffff520005b9f5e R12: 0000000000000000 [ 77.912757][ T5235] R13: ffff888078c80000 R14: 0000000000000068 R15: dffffc0000000000 [ 77.920710][ T5235] FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 77.929650][ T5235] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.936263][ T5235] CR2: 0000000020001740 CR3: 000000000e736000 CR4: 00000000003526f0 [ 77.944249][ T5235] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.952219][ T5235] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.960230][ T5235] Kernel panic - not syncing: Fatal exception [ 77.966541][ T5235] Kernel Offset: disabled [ 77.970849][ T5235] Rebooting in 86400 seconds..