./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor840695852 <...> Warning: Permanently added '10.128.0.167' (ED25519) to the list of known hosts. execve("./syz-executor840695852", ["./syz-executor840695852"], 0x7ffdbf0d9800 /* 10 vars */) = 0 brk(NULL) = 0x555566bba000 brk(0x555566bbad00) = 0x555566bbad00 arch_prctl(ARCH_SET_FS, 0x555566bba380) = 0 set_tid_address(0x555566bba650) = 296 set_robust_list(0x555566bba660, 24) = 0 rseq(0x555566bbaca0, 0x20, 0, 0x53053053) = -1 ENOSYS (Function not implemented) prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0 readlink("/proc/self/exe", "/root/syz-executor840695852", 4096) = 27 getrandom("\x4f\xe3\x36\xd9\xa1\xb8\x4e\xfd", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555566bbad00 brk(0x555566bdbd00) = 0x555566bdbd00 brk(0x555566bdc000) = 0x555566bdc000 mprotect(0x7f348e82c000, 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 executing program write(1, "executing program\n", 18) = 18 socket(AF_INET, SOCK_STREAM, IPPROTO_IP) = 3 setsockopt(3, SOL_SOCKET, SO_ZEROCOPY, "\x01\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\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"..., 65520) = 0 setsockopt(3, SOL_TCP, TCP_REPAIR, [1], 4) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(0), sin_addr=inet_addr("127.0.0.1")}, 16) = 0 setsockopt(3, SOL_TCP, TCP_REPAIR, [-1], 4) = 0 write(3, "\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\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"..., 1131) = 1131 sendmmsg(3, [{msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xed", iov_len=1}, {iov_base="\xb5", iov_len=1}, {iov_base="\x08\x41\x4e\x55\x3e\xb6\xd3\xb6\xe1\xf8\x13\x77\xe5\xc0\x6d\x4c\xf4\x3b\xa7\x43\xc1\x99\x58\x05\x88\xe0\xd0\xd8\xe6\x1f\x57\x92\xef\xb7\x76\x3f\x91\x50\x3f\x8a\xb4\x41\xf2\x12\xd7\xb0\xce\xd9\xfc\xc7\xdd\x1d\xe8\x9d\x6d\xb9\x0d\x05\x6f\x6b\x7d\xa5\xdf\xd1\x17\x58\xbf\x20\x70\x78\x81\x27\x35\x06\xbd\xf4\x0e\x9f\x94\x9a\xd6\xa0\x15\xe5\xdb\x13\x18\x1b\xb4\x2b\x02\xeb\x2b\x38\x38\x9a\xcd\x6e\xef\x2a"..., iov_len=163}, {iov_base="U", iov_len=1}, {iov_base="\x80\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\xff\xff\xff\xff\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"..., iov_len=4294966751}], msg_iovlen=5, msg_controllen=0, msg_flags=0}, msg_len=48934}, {msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xf1", iov_len=1}, {iov_base="a", iov_len=1}, {iov_base="M", iov_len=1}, {iov_base="o", iov_len=1}, {iov_base="\xea", iov_len=1}], msg_iovlen=5, msg_controllen=0, msg_flags=0}}, {msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\xbb", iov_len=1}, {iov_base="\xa1", iov_len=1}, {iov_base="s", iov_len=1}, {iov_base="\\", iov_len=1}], msg_iovlen=4, msg_controllen=0, msg_flags=0}}, {msg_hdr={msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="\x88", iov_len=1}, {iov_base="\xe5\xfd\xa9\x4c\x09\xdb\x54\xb7\x55\x6d\x59\x7a\x09\x0f\x53\x7f\x24\xf4\x58\x0b\x9b\x7a\x84\xa8\x02\xd7\x8b\xa2\xd4\x26\x94\x61\x18\x0c\x4c\x81\x35\x90\xa6\xf2\x86\x68\x14\x6b\x3c\x4f\x57\x73\xda\x19\x8e\x17\x99\x6c\xa0\x25\xe5\xc2\x97\x60\xc5\xa3\xa3\xf7\x8d\x5a\xf9\x2f\x33", iov_len=69}, {iov_base="\x96", iov_len=1}], msg_iovlen=3, msg_controllen=0, msg_flags=0}}], 4, MSG_OOB|MSG_DONTWAIT|MSG_CONFIRM|MSG_MORE|MSG_BATCH|MSG_ZEROCOPY) = 1 exit_group(0) = ? [ 37.981044][ T36] audit: type=1400 audit(1751586427.030:64): avc: denied { execmem } for pid=296 comm="syz-executor840" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 38.001961][ T296] TCP: out of memory -- consider tuning tcp_mem [ 38.008633][ T296] ------------[ cut here ]------------ [ 38.014109][ T296] WARNING: CPU: 1 PID: 296 at net/ipv4/af_inet.c:157 inet_sock_destruct+0x681/0x790 [ 38.023558][ T296] Modules linked in: [ 38.027497][ T296] CPU: 1 UID: 0 PID: 296 Comm: syz-executor840 Not tainted 6.12.30-syzkaller-ge2bf362ee23b #0 e1c904518e9113895a28c59b25a6002cdacb68bf [ 38.041382][ T296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 38.051588][ T296] RIP: 0010:inet_sock_destruct+0x681/0x790 [ 38.057446][ T296] Code: a3 e8 d3 e6 c8 fc 0f 0b e9 53 fe ff ff e8 c7 e6 c8 fc 0f 0b e9 92 fe ff ff e8 bb e6 c8 fc 0f 0b e9 c4 fe ff ff e8 af e6 c8 fc <0f> 0b e9 f6 fe ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 65 fc ff [ 38.077172][ T296] RSP: 0018:ffffc9000125fa08 EFLAGS: 00010293 [ 38.083320][ T296] RAX: ffffffff84bcbc81 RBX: 0000000080004000 RCX: ffff8881033bcc00 [ 38.091352][ T296] RDX: 0000000000000000 RSI: 0000000080004000 RDI: 0000000000000000 [ 38.099387][ T296] RBP: ffffc9000125fa50 R08: ffff8881012e5b7f R09: 1ffff1102025cb6f [ 38.107383][ T296] R10: dffffc0000000000 R11: ffffed102025cb70 R12: ffff8881012e5a00 [ 38.115396][ T296] R13: ffff8881012e5a00 R14: ffff8881012e5b64 R15: 1ffff1102025cb42 [ 38.123431][ T296] FS: 0000000000000000(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 38.132481][ T296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 38.139180][ T296] CR2: 00007f348e8330d0 CR3: 00000000072a8000 CR4: 00000000003526b0 [ 38.147184][ T296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 38.155203][ T296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 38.163233][ T296] Call Trace: [ 38.166528][ T296] [ 38.169492][ T296] ? __cfi_inet_sock_destruct+0x10/0x10 [ 38.175069][ T296] __sk_destruct+0x68/0x6a0 [ 38.179623][ T296] ? __sk_free+0x304/0x410 [ 38.184062][ T296] __sk_free+0x313/0x410 [ 38.188355][ T296] sk_free+0x58/0xb0 [ 38.192279][ T296] tcp_close+0xc4/0x120 [ 38.196443][ T296] inet_release+0x1b4/0x2c0 [ 38.201072][ T296] sock_close+0xda/0x280 [ 38.205362][ T296] ? __cfi_sock_close+0x10/0x10 [ 38.210275][ T296] __fput+0x1fe/0xa00 [ 38.214274][ T296] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 38.219863][ T296] ____fput+0x20/0x30 [ 38.223886][ T296] task_work_run+0x1e3/0x250 [ 38.228550][ T296] ? __cfi_task_work_run+0x10/0x10 [ 38.233700][ T296] ? __kasan_check_write+0x18/0x20 [ 38.238888][ T296] do_exit+0x9b4/0x2630 [ 38.243088][ T296] ? __cfi_do_exit+0x10/0x10 [ 38.247795][ T296] ? __kasan_check_write+0x18/0x20 [ 38.252946][ T296] ? _raw_spin_lock_irq+0x8d/0x120 [ 38.258122][ T296] ? __cfi__raw_spin_lock_irq+0x10/0x10 [ 38.263698][ T296] ? zap_other_threads+0x334/0x370 [ 38.268852][ T296] do_group_exit+0x22a/0x300 [ 38.273471][ T296] __x64_sys_exit_group+0x43/0x50 [ 38.278541][ T296] x64_sys_call+0x2ed2/0x2ee0 [ 38.283250][ T296] do_syscall_64+0x58/0xf0 [ 38.287721][ T296] ? clear_bhb_loop+0x50/0xa0 [ 38.292431][ T296] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 38.298382][ T296] RIP: 0033:0x7f348e7b8179 [ 38.302831][ T296] Code: Unable to access opcode bytes at 0x7f348e7b814f. [ 38.309904][ T296] RSP: 002b:00007fff283dcd18 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 38.318384][ T296] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f348e7b8179 +++ exited with 0 +++ [ 38.326400][ T296] RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0