./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2139823603 <...> Warning: Permanently added '10.128.1.11' (ED25519) to the list of known hosts. execve("./syz-executor2139823603", ["./syz-executor2139823603"], 0x7ffdd510b9c0 /* 10 vars */) = 0 brk(NULL) = 0x555555907000 brk(0x555555907d00) = 0x555555907d00 arch_prctl(ARCH_SET_FS, 0x555555907380) = 0 set_tid_address(0x555555907650) = 5824 set_robust_list(0x555555907660, 24) = 0 rseq(0x555555907ca0, 0x20, 0, 0x53053053) = 0 prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor2139823603", 4096) = 28 getrandom("\x32\xef\x3a\x17\xac\x72\x3b\x51", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555555907d00 brk(0x555555928d00) = 0x555555928d00 brk(0x555555929000) = 0x555555929000 mprotect(0x7f44181fd000, 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 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD./strace-static-x86_64: Process 5825 attached [pid 5825] set_robust_list(0x555555907660, 24) = 0 [pid 5825] prctl(PR_SET_PDEATHSIG, SIGKILL [pid 5824] <... clone resumed>, child_tidptr=0x555555907650) = 5825 [pid 5825] <... prctl resumed>) = 0 [pid 5825] setpgid(0, 0) = 0 [pid 5825] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 5825] write(3, "1000", 4) = 4 [pid 5825] close(3) = 0 [pid 5825] write(1, "executing program\n", 18executing program ) = 18 [pid 5825] memfd_create("syzkaller", 0) = 3 [pid 5825] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f440fc00000 [pid 5825] write(3, "\xb5\x84\x31\x7b\xb6\x84\x31\x7b\xb7\x84\x31\x7b\xb8\x84\x31\x7b\xb9\x84\x31\x7b\xba\x84\x31\x7b\xbb\x84\x31\x7b\xbc\x84\x31\x7b\xbd\x84\x31\x7b\xbe\x84\x31\x7b\xbf\x84\x31\x7b\xc0\x84\x31\x7b\xc1\x84\x31\x7b\xc2\x84\x31\x7b\xc3\x84\x31\x7b\xc4\x84\x31\x7b\xc5\x84\x31\x7b\xc6\x84\x31\x7b\xc7\x84\x31\x7b\xc8\x84\x31\x7b\xc9\x84\x31\x7b\xca\x84\x31\x7b\xcb\x84\x31\x7b\xcc\x84\x31\x7b\xcd\x84\x31\x7b"..., 65536) = 65536 [pid 5825] munmap(0x7f440fc00000, 138412032) = 0 [pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 5825] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 5825] close(3) = 0 [pid 5825] close(4) = 0 [pid 5825] mkdir("\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", 0777) = 0 syzkaller login: [ 81.871949][ T5825] loop0: detected capacity change from 0 to 128 [pid 5825] mount("/dev/loop0", "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", "sysv", 0, "\x30\x78\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x31\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\x37\xae\x7a\x0d\xad\xf2\x49\x84\x17\x43\x36\xc1\x9b\xd4\xf6\xeb\x98\xb0\xc5\x0f\x5a\x9b\xd5\x28\x6d\x2e\x7f\x0e\x4f\x05\x4a\x25\x41\x4a\xa3\x2f\xde\xef\x45\x06\x96\xd1\x5e\x12\x87\x04\xaf\x02\x2d\xe1\x41\x73\xeb\xb7\x60\xe3\x2e\x88\x9e\x14"...) = 0 [pid 5825] openat(AT_FDCWD, "\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f", O_RDONLY|O_DIRECTORY) = 3 [pid 5825] chdir("\x13\x13\x77\xc5\xfc\x35\xd4\x14\x54\xd5\xd4\x1d\x29\xad\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f") = 0 [pid 5825] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy) [ 81.922256][ T5825] VFS: Found a Xenix FS (block size = 1024) on device loop0 [ 81.953821][ T5825] ------------[ cut here ]------------ [ 81.959662][ T5825] WARNING: CPU: 1 PID: 5825 at fs/inode.c:464 inc_nlink+0x127/0x150 [ 81.968423][ T5825] Modules linked in: [ 81.972492][ T5825] CPU: 1 UID: 0 PID: 5825 Comm: syz-executor213 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0 [ 81.983812][ T5825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 81.993996][ T5825] RIP: 0010:inc_nlink+0x127/0x150 [ 81.999206][ T5825] Code: ff e9 35 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 47 ff ff ff 4c 89 ef e8 64 34 e7 ff e9 3a ff ff ff e8 ca 57 83 ff 90 <0f> 0b 90 e9 7b ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 49 [ 82.019733][ T5825] RSP: 0018:ffffc90003f5fd30 EFLAGS: 00010293 [ 82.025858][ T5825] RAX: ffffffff821c1bc6 RBX: 1ffff1100e88d810 RCX: ffff88802a9cbc00 [ 82.034127][ T5825] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 82.042335][ T5825] RBP: 0000000000000000 R08: ffffffff821c1b40 R09: 0000000000000000 [ 82.050414][ T5825] R10: ffffc90003f5fca8 R11: ffffffff82bea620 R12: dffffc0000000000 [ 82.058502][ T5825] R13: ffff88807446c080 R14: ffff88807446c038 R15: 0000000000000000 [ 82.066525][ T5825] FS: 0000555555907380(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 [ 82.075646][ T5825] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 82.082338][ T5825] CR2: 00005573ab3e71a8 CR3: 0000000079238000 CR4: 00000000003526f0 [ 82.090411][ T5825] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 82.098491][ T5825] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 82.106483][ T5825] Call Trace: [ 82.109860][ T5825] [ 82.112831][ T5825] ? __warn+0x165/0x4d0 [ 82.117098][ T5825] ? inc_nlink+0x127/0x150 [ 82.121705][ T5825] ? report_bug+0x2b3/0x500 [ 82.126282][ T5825] ? inc_nlink+0x127/0x150 [ 82.130863][ T5825] ? handle_bug+0x60/0x90 [ 82.135472][ T5825] ? exc_invalid_op+0x1a/0x50 [ 82.140730][ T5825] ? asm_exc_invalid_op+0x1a/0x20 [ 82.146090][ T5825] ? __pfx_sysv_mkdir+0x10/0x10 [ 82.151197][ T5825] ? inc_nlink+0xa0/0x150 [ 82.155669][ T5825] ? inc_nlink+0x126/0x150 [ 82.160740][ T5825] ? inc_nlink+0x127/0x150 [ 82.165219][ T5825] sysv_mkdir+0x21/0x130 [ 82.169574][ T5825] vfs_mkdir+0x2f9/0x4f0 [ 82.173874][ T5825] do_mkdirat+0x264/0x3a0 [ 82.178338][ T5825] ? __check_object_size+0x47a/0x730 [ 82.184222][ T5825] ? __pfx_do_mkdirat+0x10/0x10 [ 82.189262][ T5825] ? strncpy_from_user+0x152/0x270 [ 82.194448][ T5825] ? getname_flags+0x1e3/0x540 [ 82.199517][ T5825] __x64_sys_mkdir+0x6c/0x80 [ 82.204180][ T5825] do_syscall_64+0xf3/0x230 [ 82.208785][ T5825] ? clear_bhb_loop+0x35/0x90 [ 82.213512][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.219653][ T5825] RIP: 0033:0x7f441817ed97 [ 82.224960][ T5825] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 82.245883][ T5825] RSP: 002b:00007ffd30a10508 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 82.254856][ T5825] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f441817ed97 [ 82.263273][ T5825] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000000 [ 82.271901][ T5825] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009e7e [ 82.281063][ T5825] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd30a10590 [ 82.289166][ T5825] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 82.297317][ T5825] [ 82.300416][ T5825] Kernel panic - not syncing: kernel: panic_on_warn set ... [ 82.307735][ T5825] CPU: 1 UID: 0 PID: 5825 Comm: syz-executor213 Not tainted 6.13.0-rc4-syzkaller-00110-g4099a71718b0 #0 [ 82.319297][ T5825] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 [ 82.329373][ T5825] Call Trace: [ 82.332668][ T5825] [ 82.335616][ T5825] dump_stack_lvl+0x241/0x360 [ 82.340325][ T5825] ? __pfx_dump_stack_lvl+0x10/0x10 [ 82.345560][ T5825] ? __pfx__printk+0x10/0x10 [ 82.350180][ T5825] ? vscnprintf+0x5d/0x90 [ 82.354580][ T5825] panic+0x349/0x880 [ 82.358505][ T5825] ? __warn+0x174/0x4d0 [ 82.362692][ T5825] ? __pfx_panic+0x10/0x10 [ 82.367153][ T5825] __warn+0x344/0x4d0 [ 82.371208][ T5825] ? inc_nlink+0x127/0x150 [ 82.375656][ T5825] report_bug+0x2b3/0x500 [ 82.380022][ T5825] ? inc_nlink+0x127/0x150 [ 82.384474][ T5825] handle_bug+0x60/0x90 [ 82.388649][ T5825] exc_invalid_op+0x1a/0x50 [ 82.393171][ T5825] asm_exc_invalid_op+0x1a/0x20 [ 82.398055][ T5825] RIP: 0010:inc_nlink+0x127/0x150 [ 82.403143][ T5825] Code: ff e9 35 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 47 ff ff ff 4c 89 ef e8 64 34 e7 ff e9 3a ff ff ff e8 ca 57 83 ff 90 <0f> 0b 90 e9 7b ff ff ff 44 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 49 [ 82.422779][ T5825] RSP: 0018:ffffc90003f5fd30 EFLAGS: 00010293 [ 82.428874][ T5825] RAX: ffffffff821c1bc6 RBX: 1ffff1100e88d810 RCX: ffff88802a9cbc00 [ 82.437052][ T5825] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 82.445055][ T5825] RBP: 0000000000000000 R08: ffffffff821c1b40 R09: 0000000000000000 [ 82.453062][ T5825] R10: ffffc90003f5fca8 R11: ffffffff82bea620 R12: dffffc0000000000 [ 82.461087][ T5825] R13: ffff88807446c080 R14: ffff88807446c038 R15: 0000000000000000 [ 82.469092][ T5825] ? __pfx_sysv_mkdir+0x10/0x10 [ 82.474063][ T5825] ? inc_nlink+0xa0/0x150 [ 82.478650][ T5825] ? inc_nlink+0x126/0x150 [ 82.483138][ T5825] sysv_mkdir+0x21/0x130 [ 82.487426][ T5825] vfs_mkdir+0x2f9/0x4f0 [ 82.492499][ T5825] do_mkdirat+0x264/0x3a0 [ 82.496849][ T5825] ? __check_object_size+0x47a/0x730 [ 82.502203][ T5825] ? __pfx_do_mkdirat+0x10/0x10 [ 82.507088][ T5825] ? strncpy_from_user+0x152/0x270 [ 82.512268][ T5825] ? getname_flags+0x1e3/0x540 [ 82.517283][ T5825] __x64_sys_mkdir+0x6c/0x80 [ 82.522087][ T5825] do_syscall_64+0xf3/0x230 [ 82.526652][ T5825] ? clear_bhb_loop+0x35/0x90 [ 82.533159][ T5825] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.539646][ T5825] RIP: 0033:0x7f441817ed97 [ 82.544632][ T5825] Code: ff ff 77 07 31 c0 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 [ 82.565687][ T5825] RSP: 002b:00007ffd30a10508 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 82.574352][ T5825] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f441817ed97 [ 82.582357][ T5825] RDX: 0000000000000000 RSI: 00000000000001ff RDI: 0000000020000000 [ 82.590454][ T5825] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000009e7e [ 82.598821][ T5825] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd30a10590 [ 82.606816][ T5825] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 82.614999][ T5825] [ 82.618490][ T5825] Kernel Offset: disabled [ 82.623038][ T5825] Rebooting in 86400 seconds..