./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor974341445 <...> Warning: Permanently added '10.128.0.127' (ED25519) to the list of known hosts. execve("./syz-executor974341445", ["./syz-executor974341445"], 0x7ffc3420dba0 /* 10 vars */) = 0 brk(NULL) = 0x55555608d000 brk(0x55555608de00) = 0x55555608de00 arch_prctl(ARCH_SET_FS, 0x55555608d480) = 0 set_tid_address(0x55555608d750) = 286 set_robust_list(0x55555608d760, 24) = 0 rseq(0x55555608dda0, 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-executor974341445", 4096) = 27 getrandom("\x22\x8b\x75\x85\x70\x55\xc9\xcc", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x55555608de00 brk(0x5555560aee00) = 0x5555560aee00 brk(0x5555560af000) = 0x5555560af000 mprotect(0x7f24cc786000, 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=0x7f24cc6e3be0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f24cc6eada0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f24cc6e3be0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f24cc6eada0}, NULL, 8) = 0 mkdir("./file0", 0200) = 0 mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0 openat(-1, ".pending_reads", O_RDONLY) = -1 EBADF (Bad file descriptor) openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 3 [ 20.179580][ T24] audit: type=1400 audit(1707805981.530:66): avc: denied { execmem } for pid=286 comm="syz-executor974" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.182565][ T24] audit: type=1400 audit(1707805981.530:67): avc: denied { mounton } for pid=286 comm="syz-executor974" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.185785][ T24] audit: type=1400 audit(1707805981.530:68): avc: denied { mount } for pid=286 comm="syz-executor974" name="/" dev="incremental-fs" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 write(3, "\x49\xcc\x03\xcf\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x69\x6e\x63\x72\x65\x6d\x65\x6e\x74\x61\x6c\x2d\x66\x73\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 1840702809) = 16777216 mmap(0x20000000, 12288, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_NONBLOCK, 3, 0) = 0x20000000 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000100} --- open("./file0", O_RDONLY) = 4 --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000080} --- --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_ACCERR, si_addr=0x20000000} --- [ 20.271693][ T24] audit: type=1400 audit(1707805981.620:69): avc: denied { write } for pid=286 comm="syz-executor974" name="/" dev="incremental-fs" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 20.271840][ T286] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 20.294929][ T24] audit: type=1400 audit(1707805981.620:70): avc: denied { add_name } for pid=286 comm="syz-executor974" name=".pending_reads" dev="incremental-fs" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 20.306146][ T286] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 20.306158][ T286] CPU: 0 PID: 286 Comm: syz-executor974 Not tainted 5.10.209-syzkaller-00423-gfc10db4b1932 #0 [ 20.306163][ T286] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 20.306191][ T286] RIP: 0010:vfs_link+0x3c/0x890 [ 20.306208][ T286] Code: 89 4d a0 49 89 d4 49 89 f6 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 43 a0 b6 ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 25 17 f4 ff 48 8b 03 48 89 45 d0 [ 20.332420][ T24] audit: type=1400 audit(1707805981.620:71): avc: denied { link } for pid=286 comm="syz-executor974" name=".pending_reads" dev="incremental-fs" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 20.340441][ T286] RSP: 0018:ffffc90000967bd0 EFLAGS: 00010206 [ 20.340451][ T286] RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811e28cf00 [ 20.340457][ T286] RDX: 0000000000000000 RSI: ffff8881105c6018 RDI: 0000000000000000 [ 20.340463][ T286] RBP: ffffc90000967c30 R08: dffffc0000000000 R09: ffffed10220b8c19 [ 20.340475][ T286] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c4ceee0 [ 20.446098][ T286] R13: ffffc90000967cc8 R14: ffff8881105c6018 R15: dffffc0000000000 [ 20.453908][ T286] FS: 000055555608d480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.462669][ T286] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.469092][ T286] CR2: 0000000020000000 CR3: 000000011e27b000 CR4: 00000000003506b0 [ 20.476908][ T286] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.484912][ T286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.492789][ T286] Call Trace: [ 20.495921][ T286] ? __die_body+0x62/0xb0 [ 20.500094][ T286] ? die_addr+0x9f/0xd0 [ 20.504088][ T286] ? exc_general_protection+0x3ff/0x490 [ 20.509458][ T286] ? asm_exc_general_protection+0x1e/0x30 [ 20.515097][ T286] ? vfs_link+0x3c/0x890 [ 20.519173][ T286] ? dget_parent+0xbe/0x280 [ 20.523519][ T286] dir_link+0x37f/0x510 [ 20.527522][ T286] ? dir_lookup+0x690/0x690 [ 20.531850][ T286] ? down_write+0xd7/0x150 [ 20.536100][ T286] ? down_read_killable+0x220/0x220 [ 20.541314][ T286] ? selinux_inode_link+0x1f/0x30 [ 20.546182][ T286] ? try_break_deleg+0x7c/0x120 [ 20.551615][ T286] vfs_link+0x68f/0x890 [ 20.555552][ T286] do_linkat+0x471/0x8b0 [ 20.559620][ T286] ? do_symlinkat+0x400/0x400 [ 20.564132][ T286] ? debug_smp_processor_id+0x17/0x20 [ 20.569428][ T286] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 20.575329][ T286] ? irqentry_exit_to_user_mode+0x4d/0x80 [ 20.580880][ T286] __x64_sys_linkat+0xbf/0xd0 [ 20.585392][ T286] do_syscall_64+0x34/0x70 [ 20.589648][ T286] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 20.595376][ T286] RIP: 0033:0x7f24cc713c69 [ 20.599629][ T286] 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 [ 20.619078][ T286] RSP: 002b:00007ffe3ec91ab8 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 [ 20.627329][ T286] RAX: ffffffffffffffda RBX: 00007ffe3ec91ac0 RCX: 00007f24cc713c69 [ 20.635128][ T286] RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 [ 20.642939][ T286] RBP: 00007ffe3ec91ac8 R08: 0000000000000000 R09: 00007f24cc6e3be0 [ 20.650751][ T286] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 [ 20.658563][ T286] R13: 00007ffe3ec91d28 R14: 0000000000000001 R15: 0000000000000001 [ 20.666372][ T286] Modules linked in: [ 20.670271][ T286] ---[ end trace cc29ddc6fbc81186 ]--- [ 20.675539][ T286] RIP: 0010:vfs_link+0x3c/0x890 [ 20.680243][ T286] Code: 89 4d a0 49 89 d4 49 89 f6 48 89 fb 49 bf 00 00 00 00 00 fc ff df e8 43 a0 b6 ff 48 89 5d a8 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 25 17 f4 ff 48 8b 03 48 89 45 d0 [ 20.699683][ T286] RSP: 0018:ffffc90000967bd0 EFLAGS: 00010206 [ 20.705556][ T286] RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811e28cf00 [ 20.713407][ T286] RDX: 0000000000000000 RSI: ffff8881105c6018 RDI: 0000000000000000 [ 20.721196][ T286] RBP: ffffc90000967c30 R08: dffffc0000000000 R09: ffffed10220b8c19 [ 20.729022][ T286] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811c4ceee0 [ 20.736816][ T286] R13: ffffc90000967cc8 R14: ffff8881105c6018 R15: dffffc0000000000 [ 20.744658][ T286] FS: 000055555608d480(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 20.753395][ T286] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 20.759823][ T286] CR2: 0000000020000000 CR3: 000000011e27b000 CR4: 00000000003506b0 [ 20.767641][ T286] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 20.775422][ T286] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 20.783351][ T286] Kernel panic - not syncing: Fatal exception [ 20.789415][ T286] Kernel Offset: disabled [ 20.793621][ T286] Rebooting in 86400 seconds..