./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3452504189 <...> DUID 00:04:9f:e8:07:f9:ba:36:1f:d4:05:68:5a:d1:6a:7f:90:cd forked to background, child pid 3188 [ 25.337679][ T3189] 8021q: adding VLAN 0 to HW filter on device bond0 [ 25.353216][ T3189] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.76' (ECDSA) to the list of known hosts. execve("./syz-executor3452504189", ["./syz-executor3452504189"], 0x7fff05caf4e0 /* 10 vars */) = 0 brk(NULL) = 0x555555c31000 brk(0x555555c31d00) = 0x555555c31d00 arch_prctl(ARCH_SET_FS, 0x555555c313c0) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3452504189", 4096) = 28 brk(0x555555c52d00) = 0x555555c52d00 brk(0x555555c53000) = 0x555555c53000 mprotect(0x7f8a9314b000, 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=0x7f8a9309cae0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f8a9309cdd0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f8a9309cae0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f8a9309cdd0}, NULL, 8) = 0 mkdir("./file0", 0777) = 0 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=NULL} --- pipe2([3, 4], 0) = 0 write(4, "\x15\x00\x00\x00\x65\xff\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 21) = 21 dup(4) = 5 mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000005,") = -1 EREMOTEIO (Remote I/O error) write(5, "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 24) = 24 write(5, "\xb0\x00\x00\x00\x00\x00\x00\x6b\x2e\x7f\xb3\xf3\x73\x25\xda\x31\x44\x1d\xb4\x8c\xe3\x66\xa2\x33\xa6\x5b\x0f\xf5\x73\x17\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 176) = 176 write(5, "\x4c\x01\x00\x00\x05\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 311) = 311 mount(NULL, "./file0", "9p", 0, "trans=fd,rfdno=0x0000000000000003,wfdno=0x0000000000000004,") = 0 syzkaller login: [ 41.980556][ T3609] ------------[ cut here ]------------ [ 41.986207][ T3609] WARNING: CPU: 1 PID: 3609 at fs/inode.c:388 inc_nlink+0x11e/0x130 [ 41.994233][ T3609] Modules linked in: [ 41.998136][ T3609] CPU: 1 PID: 3609 Comm: syz-executor345 Not tainted 5.19.0-rc7-syzkaller-00005-gca85855bdcae #0 [ 42.008694][ T3609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 42.018855][ T3609] RIP: 0010:inc_nlink+0x11e/0x130 [ 42.023928][ T3609] Code: ea ff e9 38 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 49 ff ff ff 4c 89 ef e8 cc 62 ea ff e9 3c ff ff ff e8 72 a8 97 ff <0f> 0b eb 80 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 [ 42.043775][ T3609] RSP: 0018:ffffc9000304fc08 EFLAGS: 00010293 [ 42.049837][ T3609] RAX: ffffffff81efed3e RBX: 1ffff1100e7e4009 RCX: ffff88801bcd5880 [ 42.057868][ T3609] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 42.066055][ T3609] RBP: 0000000000000000 R08: ffffffff81efecb8 R09: ffffed100e7e40cd [ 42.074130][ T3609] R10: ffffed100e7e40cd R11: 1ffff1100e7e40cc R12: dffffc0000000000 [ 42.082114][ T3609] R13: ffff888073f20048 R14: ffff888073f20000 R15: 0000000000000000 [ 42.090121][ T3609] FS: 0000555555c313c0(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 [ 42.099105][ T3609] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 42.105723][ T3609] CR2: 00007f5f6bd6f6a8 CR3: 00000000257ef000 CR4: 00000000003506e0 [ 42.113759][ T3609] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 42.121726][ T3609] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 42.129737][ T3609] Call Trace: [ 42.133063][ T3609] [ 42.135992][ T3609] v9fs_vfs_mkdir_dotl+0x6bc/0x860 [ 42.141097][ T3609] ? v9fs_vfs_symlink_dotl+0x580/0x580 [ 42.146603][ T3609] ? bpf_lsm_inode_mkdir+0x5/0x10 [ 42.151630][ T3609] ? security_inode_mkdir+0xdd/0x120 [ 42.156963][ T3609] vfs_mkdir+0x2f6/0x4d0 [ 42.161225][ T3609] do_mkdirat+0x267/0x510 [ 42.165588][ T3609] ? __check_object_size+0x15a/0x210 [ 42.170880][ T3609] ? vfs_mkdir+0x4d0/0x4d0 [ 42.175331][ T3609] ? getname_flags+0x1ea/0x4e0 [ 42.180104][ T3609] __x64_sys_mkdir+0x6a/0x80 [ 42.184749][ T3609] do_syscall_64+0x2b/0x70 [ 42.189339][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 42.195502][ T3609] RIP: 0033:0x7f8a930de819 [ 42.199926][ T3609] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 42.219578][ T3609] RSP: 002b:00007ffcabdd7558 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 42.228023][ T3609] RAX: ffffffffffffffda RBX: 00007ffcabdd7568 RCX: 00007f8a930de819 [ 42.236021][ T3609] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0 [ 42.244018][ T3609] RBP: 00007ffcabdd7560 R08: 00007f8a9309cae0 R09: 00007f8a9309cae0 [ 42.251977][ T3609] R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000 [ 42.259977][ T3609] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.267982][ T3609] [ 42.270990][ T3609] Kernel panic - not syncing: panic_on_warn set ... [ 42.277554][ T3609] CPU: 1 PID: 3609 Comm: syz-executor345 Not tainted 5.19.0-rc7-syzkaller-00005-gca85855bdcae #0 [ 42.288029][ T3609] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 [ 42.298064][ T3609] Call Trace: [ 42.301327][ T3609] [ 42.304242][ T3609] dump_stack_lvl+0x1e3/0x2cb [ 42.308931][ T3609] ? bfq_pos_tree_add_move+0x436/0x436 [ 42.314388][ T3609] ? panic+0x76e/0x76e [ 42.318441][ T3609] ? vscnprintf+0x59/0x80 [ 42.322760][ T3609] ? inc_nlink+0xe0/0x130 [ 42.327086][ T3609] panic+0x312/0x76e [ 42.330978][ T3609] ? __warn+0x131/0x220 [ 42.335131][ T3609] ? fb_is_primary_device+0xcc/0xcc [ 42.340332][ T3609] ? inc_nlink+0x11e/0x130 [ 42.344741][ T3609] __warn+0x1fa/0x220 [ 42.348727][ T3609] ? inc_nlink+0x11e/0x130 [ 42.353140][ T3609] report_bug+0x1b3/0x2d0 [ 42.357468][ T3609] handle_bug+0x3d/0x70 [ 42.361613][ T3609] exc_invalid_op+0x16/0x40 [ 42.366111][ T3609] asm_exc_invalid_op+0x16/0x20 [ 42.370954][ T3609] RIP: 0010:inc_nlink+0x11e/0x130 [ 42.375970][ T3609] Code: ea ff e9 38 ff ff ff 44 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 49 ff ff ff 4c 89 ef e8 cc 62 ea ff e9 3c ff ff ff e8 72 a8 97 ff <0f> 0b eb 80 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 57 41 56 [ 42.395564][ T3609] RSP: 0018:ffffc9000304fc08 EFLAGS: 00010293 [ 42.401621][ T3609] RAX: ffffffff81efed3e RBX: 1ffff1100e7e4009 RCX: ffff88801bcd5880 [ 42.409581][ T3609] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 42.417539][ T3609] RBP: 0000000000000000 R08: ffffffff81efecb8 R09: ffffed100e7e40cd [ 42.425501][ T3609] R10: ffffed100e7e40cd R11: 1ffff1100e7e40cc R12: dffffc0000000000 [ 42.433463][ T3609] R13: ffff888073f20048 R14: ffff888073f20000 R15: 0000000000000000 [ 42.441430][ T3609] ? inc_nlink+0x98/0x130 [ 42.445750][ T3609] ? inc_nlink+0x11e/0x130 [ 42.450172][ T3609] ? inc_nlink+0x11e/0x130 [ 42.454580][ T3609] v9fs_vfs_mkdir_dotl+0x6bc/0x860 [ 42.459691][ T3609] ? v9fs_vfs_symlink_dotl+0x580/0x580 [ 42.465155][ T3609] ? bpf_lsm_inode_mkdir+0x5/0x10 [ 42.470192][ T3609] ? security_inode_mkdir+0xdd/0x120 [ 42.475473][ T3609] vfs_mkdir+0x2f6/0x4d0 [ 42.479714][ T3609] do_mkdirat+0x267/0x510 [ 42.484034][ T3609] ? __check_object_size+0x15a/0x210 [ 42.489311][ T3609] ? vfs_mkdir+0x4d0/0x4d0 [ 42.493719][ T3609] ? getname_flags+0x1ea/0x4e0 [ 42.498475][ T3609] __x64_sys_mkdir+0x6a/0x80 [ 42.503056][ T3609] do_syscall_64+0x2b/0x70 [ 42.507465][ T3609] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 42.513348][ T3609] RIP: 0033:0x7f8a930de819 [ 42.517753][ T3609] Code: 28 c3 e8 5a 14 00 00 66 2e 0f 1f 84 00 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 c0 ff ff ff f7 d8 64 89 01 48 [ 42.537345][ T3609] RSP: 002b:00007ffcabdd7558 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 [ 42.545748][ T3609] RAX: ffffffffffffffda RBX: 00007ffcabdd7568 RCX: 00007f8a930de819 [ 42.553708][ T3609] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200002c0 [ 42.561670][ T3609] RBP: 00007ffcabdd7560 R08: 00007f8a9309cae0 R09: 00007f8a9309cae0 [ 42.569633][ T3609] R10: 0000000020000340 R11: 0000000000000246 R12: 0000000000000000 [ 42.577592][ T3609] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 42.585566][ T3609] [ 42.588847][ T3609] Kernel Offset: disabled [ 42.593217][ T3609] Rebooting in 86400 seconds..