./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2448454467 <...> Warning: Permanently added '10.128.1.131' (ED25519) to the list of known hosts. execve("./syz-executor2448454467", ["./syz-executor2448454467"], 0x7ffcece18880 /* 10 vars */) = 0 brk(NULL) = 0x5555568ff000 brk(0x5555568ffe00) = 0x5555568ffe00 arch_prctl(ARCH_SET_FS, 0x5555568ff480) = 0 set_tid_address(0x5555568ff750) = 296 set_robust_list(0x5555568ff760, 24) = 0 rseq(0x5555568ffda0, 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-executor2448454467", 4096) = 28 getrandom("\xc8\xf2\x66\x1d\xb5\xf7\x4b\xb6", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555568ffe00 brk(0x555556920e00) = 0x555556920e00 brk(0x555556921000) = 0x555556921000 mprotect(0x7f3412dee000, 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=0x7f3412d4bbe0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f3412d52da0}, NULL, 8) = 0 rt_sigaction(SIGBUS, {sa_handler=0x7f3412d4bbe0, sa_mask=[], sa_flags=SA_RESTORER|SA_NODEFER|SA_SIGINFO, sa_restorer=0x7f3412d52da0}, 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 [ 24.480405][ T30] audit: type=1400 audit(1708786944.186:66): avc: denied { execmem } for pid=296 comm="syz-executor244" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 24.500139][ T30] audit: type=1400 audit(1708786944.186:67): avc: denied { mounton } for pid=296 comm="syz-executor244" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 24.523105][ T30] audit: type=1400 audit(1708786944.186:68): avc: denied { mount } for pid=296 comm="syz-executor244" 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} --- [ 24.626565][ T30] audit: type=1400 audit(1708786944.326:69): avc: denied { write } for pid=296 comm="syz-executor244" name="/" dev="incremental-fs" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.649465][ T30] audit: type=1400 audit(1708786944.356:70): avc: denied { add_name } for pid=296 comm="syz-executor244" 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 [ 24.649607][ T296] general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN [ 24.673531][ T30] audit: type=1400 audit(1708786944.356:71): avc: denied { link } for pid=296 comm="syz-executor244" 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 [ 24.684781][ T296] KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] [ 24.684798][ T296] CPU: 1 PID: 296 Comm: syz-executor244 Not tainted 5.15.148-syzkaller-00718-g993bed180178 #0 [ 24.726794][ T296] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 [ 24.736686][ T296] RIP: 0010:vfs_link+0x40/0x7f0 [ 24.741378][ T296] Code: 89 cd 49 89 d6 48 89 75 c0 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 ff 3d b2 ff 48 89 5d a0 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 81 4e f4 ff 48 8b 03 48 89 45 d0 [ 24.760990][ T296] RSP: 0018:ffffc9000078fba8 EFLAGS: 00010206 [ 24.766895][ T296] RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811f0a62c0 [ 24.774714][ T296] RDX: 0000000000000000 RSI: ffffffff868f33c0 RDI: 0000000000000000 [ 24.782510][ T296] RBP: ffffc9000078fc10 R08: 0000000000000000 R09: ffffed1021260619 [ 24.790329][ T296] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 24.798142][ T296] R13: ffff88811bd90990 R14: ffff888109303018 R15: ffff888109303018 [ 24.805942][ T296] FS: 00005555568ff480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 24.814720][ T296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.821133][ T296] CR2: 0000000020000000 CR3: 0000000119047000 CR4: 00000000003506a0 [ 24.828945][ T296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.836756][ T296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.844573][ T296] Call Trace: [ 24.847692][ T296] [ 24.850471][ T296] ? __die_body+0x62/0xb0 [ 24.854634][ T296] ? die_addr+0x9f/0xd0 [ 24.858625][ T296] ? exc_general_protection+0x311/0x4b0 [ 24.864013][ T296] ? avc_has_perm+0x1f5/0x260 [ 24.868524][ T296] ? audit_inode_permission+0x1ce/0x2a0 [ 24.873904][ T296] ? asm_exc_general_protection+0x27/0x30 [ 24.879470][ T296] ? vfs_link+0x40/0x7f0 [ 24.883545][ T296] ? vfs_link+0x31/0x7f0 [ 24.887624][ T296] dir_link+0x347/0x4c0 [ 24.891629][ T296] ? dir_lookup+0x680/0x680 [ 24.895953][ T296] ? try_break_deleg+0x7c/0x120 [ 24.900638][ T296] vfs_link+0x645/0x7f0 [ 24.904641][ T296] do_linkat+0x34d/0x9f0 [ 24.908711][ T296] ? fsnotify_link+0x240/0x240 [ 24.913307][ T296] ? strncpy_from_user+0x18e/0x2d0 [ 24.918254][ T296] ? getname_flags+0x1fd/0x520 [ 24.922856][ T296] __x64_sys_linkat+0xe9/0x100 [ 24.927456][ T296] do_syscall_64+0x3d/0xb0 [ 24.931714][ T296] entry_SYSCALL_64_after_hwframe+0x61/0xcb [ 24.937439][ T296] RIP: 0033:0x7f3412d7bc69 [ 24.941687][ T296] 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 [ 24.961129][ T296] RSP: 002b:00007ffeafbb6338 EFLAGS: 00000246 ORIG_RAX: 0000000000000109 [ 24.969374][ T296] RAX: ffffffffffffffda RBX: 00007ffeafbb6340 RCX: 00007f3412d7bc69 [ 24.977205][ T296] RDX: 0000000000000004 RSI: 0000000020000080 RDI: 0000000000000004 [ 24.985081][ T296] RBP: 00007ffeafbb6348 R08: 0000000000000000 R09: 00007f3412d4bbe0 [ 24.992894][ T296] R10: 0000000020000000 R11: 0000000000000246 R12: 0000000000000000 [ 25.000709][ T296] R13: 00007ffeafbb65a8 R14: 0000000000000001 R15: 0000000000000001 [ 25.008521][ T296] [ 25.011380][ T296] Modules linked in: [ 25.015315][ T296] ---[ end trace 1e0b7e1962694c20 ]--- [ 25.020709][ T296] RIP: 0010:vfs_link+0x40/0x7f0 [ 25.025352][ T296] Code: 89 cd 49 89 d6 48 89 75 c0 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 ff 3d b2 ff 48 89 5d a0 48 83 c3 30 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 81 4e f4 ff 48 8b 03 48 89 45 d0 [ 25.044842][ T296] RSP: 0018:ffffc9000078fba8 EFLAGS: 00010206 [ 25.050715][ T296] RAX: 0000000000000006 RBX: 0000000000000030 RCX: ffff88811f0a62c0 [ 25.058505][ T296] RDX: 0000000000000000 RSI: ffffffff868f33c0 RDI: 0000000000000000 [ 25.066318][ T296] RBP: ffffc9000078fc10 R08: 0000000000000000 R09: ffffed1021260619 [ 25.074165][ T296] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 25.082392][ T296] R13: ffff88811bd90990 R14: ffff888109303018 R15: ffff888109303018 [ 25.090299][ T296] FS: 00005555568ff480(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 25.099052][ T296] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 25.105457][ T296] CR2: 0000000020000000 CR3: 0000000119047000 CR4: 00000000003506a0 [ 25.113327][ T296] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 25.121101][ T296] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 25.130344][ T296] Kernel panic - not syncing: Fatal exception [ 25.136488][ T296] Kernel Offset: disabled [ 25.140618][ T296] Rebooting in 86400 seconds..