./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor624341852 <...> Warning: Permanently added '10.128.0.245' (ED25519) to the list of known hosts. execve("./syz-executor624341852", ["./syz-executor624341852"], 0x7ffc637af6a0 /* 10 vars */) = 0 brk(NULL) = 0x5555724e6000 brk(0x5555724e6d00) = 0x5555724e6d00 arch_prctl(ARCH_SET_FS, 0x5555724e6380) = 0 set_tid_address(0x5555724e6650) = 289 set_robust_list(0x5555724e6660, 24) = 0 rseq(0x5555724e6ca0, 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-executor624341852", 4096) = 27 getrandom("\x93\x83\xc8\x5d\x9c\xf7\x93\x33", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555724e6d00 brk(0x555572507d00) = 0x555572507d00 brk(0x555572508000) = 0x555572508000 mprotect(0x7fa9a07b3000, 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, 0executing program ) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000 write(1, "executing program\n", 18) = 18 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fa998302000 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"..., 1048576) = 1048576 munmap(0x7fa998302000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file1", 0777) = 0 [ 31.201049][ T28] audit: type=1400 audit(1747553803.666:64): avc: denied { execmem } for pid=289 comm="syz-executor624" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 31.211596][ T289] loop0: detected capacity change from 0 to 2048 [ 31.221528][ T28] audit: type=1400 audit(1747553803.676:65): avc: denied { read write } for pid=289 comm="syz-executor624" name="loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 31.252231][ T28] audit: type=1400 audit(1747553803.676:66): avc: denied { open } for pid=289 comm="syz-executor624" path="/dev/loop0" dev="devtmpfs" ino=118 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 mount("/dev/loop0", "./file1", "ext4", MS_DIRSYNC|MS_NOATIME|MS_LAZYTIME, ",errors=continue") = 0 openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 chdir("./file1") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 setrlimit(RLIMIT_FSIZE, {rlim_cur=RLIM64_INFINITY, rlim_max=RLIM64_INFINITY}) = 0 open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_SYNC|O_NOATIME|FASYNC, 000) = 4 [ 31.276790][ T28] audit: type=1400 audit(1747553803.676:67): avc: denied { ioctl } for pid=289 comm="syz-executor624" path="/dev/loop0" dev="devtmpfs" ino=118 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 31.279384][ T289] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. [ 31.303091][ T28] audit: type=1400 audit(1747553803.696:68): avc: denied { mounton } for pid=289 comm="syz-executor624" path="/root/file1" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 31.323849][ T289] ------------[ cut here ]------------ [ 31.334999][ T28] audit: type=1400 audit(1747553803.776:69): avc: denied { mount } for pid=289 comm="syz-executor624" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 31.339940][ T289] kernel BUG at fs/ext4/inline.c:236! [ 31.362445][ T28] audit: type=1400 audit(1747553803.776:70): avc: denied { write } for pid=289 comm="syz-executor624" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 31.368630][ T289] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 31.390392][ T28] audit: type=1400 audit(1747553803.776:71): avc: denied { add_name } for pid=289 comm="syz-executor624" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 31.396297][ T289] CPU: 1 PID: 289 Comm: syz-executor624 Not tainted 6.1.134-syzkaller-00016-ga0fa2316cce1 #0 [ 31.417248][ T28] audit: type=1400 audit(1747553803.776:72): avc: denied { create } for pid=289 comm="syz-executor624" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 31.427279][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 [ 31.427293][ T289] RIP: 0010:ext4_write_inline_data+0x3ab/0x3b0 [ 31.448073][ T28] audit: type=1400 audit(1747553803.786:73): avc: denied { read write open } for pid=289 comm="syz-executor624" path="/root/file1/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 31.458129][ T289] Code: 07 fe c1 38 c1 0f 8c 2c ff ff ff 48 89 df 49 89 d7 e8 c9 aa cd ff 4c 89 fa e9 19 ff ff ff e8 cc 58 89 ff 0f 0b e8 c5 58 89 ff <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 b8 a4 70 30 e0 55 [ 31.458150][ T289] RSP: 0018:ffffc90000da7740 EFLAGS: 00010293 [ 31.458169][ T289] RAX: ffffffff81e68e0b RBX: 0000010000000006 RCX: ffff88810c002880 [ 31.523433][ T289] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006 [ 31.531614][ T289] RBP: ffffc90000da7790 R08: dffffc0000000000 R09: ffffed102014e44b [ 31.540023][ T289] R10: ffffed102014e44b R11: 1ffff1102014e44a R12: ffff88810f9d0168 [ 31.548029][ T289] R13: ffffc90000da7820 R14: 0000010000000005 R15: 000000000000003c [ 31.556108][ T289] FS: 00005555724e6380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 31.565267][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.572130][ T289] CR2: 000055f3d440d4c0 CR3: 0000000125f24000 CR4: 00000000003506a0 [ 31.580115][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.588175][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.596230][ T289] Call Trace: [ 31.599534][ T289] [ 31.602469][ T289] ext4_write_inline_data_end+0x343/0xa90 [ 31.608195][ T289] ? __cfi_ext4_write_inline_data_end+0x10/0x10 [ 31.614528][ T289] ? __cfi_copy_page_from_iter_atomic+0x10/0x10 [ 31.620861][ T289] ext4_da_write_end+0x1ce/0x8c0 [ 31.625905][ T289] generic_perform_write+0x3a2/0x6d0 [ 31.631247][ T289] ? __cfi_generic_perform_write+0x10/0x10 [ 31.637197][ T289] ext4_buffered_write_iter+0x36f/0x660 [ 31.642837][ T289] ext4_file_write_iter+0x18f/0x13d0 [ 31.648131][ T289] ? __cfi___switch_to+0x10/0x10 [ 31.653067][ T289] ? _raw_spin_unlock+0x4c/0x70 [ 31.657915][ T289] ? finish_task_switch+0x16b/0x7b0 [ 31.663123][ T289] ? __switch_to_asm+0x3a/0x60 [ 31.668249][ T289] ? avc_policy_seqno+0x1b/0x70 [ 31.673156][ T289] ? __cfi_ext4_file_write_iter+0x10/0x10 [ 31.679256][ T289] ? fsnotify_perm+0x67/0x5b0 [ 31.684825][ T289] ? security_file_permission+0x8a/0xb0 [ 31.690662][ T289] vfs_write+0x5db/0xca0 [ 31.694914][ T289] ? __cfi_vfs_write+0x10/0x10 [ 31.699690][ T289] ? _raw_spin_unlock_irq+0x4d/0x70 [ 31.704928][ T289] ? __kasan_check_read+0x11/0x20 [ 31.710072][ T289] ? __fdget+0x15b/0x220 [ 31.714604][ T289] __x64_sys_pwrite64+0x191/0x220 [ 31.719736][ T289] ? __cfi___x64_sys_pwrite64+0x10/0x10 [ 31.725589][ T289] ? fpregs_restore_userregs+0x128/0x260 [ 31.731790][ T289] x64_sys_call+0x36/0x9a0 [ 31.736326][ T289] do_syscall_64+0x4c/0xa0 [ 31.740760][ T289] ? clear_bhb_loop+0x15/0x70 [ 31.745453][ T289] ? clear_bhb_loop+0x15/0x70 [ 31.750359][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 31.756276][ T289] RIP: 0033:0x7fa9a073f6f9 [ 31.760800][ T289] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 [ 31.780418][ T289] RSP: 002b:00007ffdcda13e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 [ 31.789359][ T289] RAX: ffffffffffffffda RBX: 00007ffdcda14008 RCX: 00007fa9a073f6f9 [ 31.797711][ T289] RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000004 [ 31.806739][ T289] RBP: 00007fa9a07b3610 R08: 0000000000000000 R09: 00007ffdcda14008 [ 31.816033][ T289] R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000001 [ 31.824624][ T289] R13: 00007ffdcda13ff8 R14: 0000000000000001 R15: 0000000000000001 [ 31.832627][ T289] [ 31.835683][ T289] Modules linked in: [ 31.839655][ T289] ---[ end trace 0000000000000000 ]--- [ 31.845240][ T289] RIP: 0010:ext4_write_inline_data+0x3ab/0x3b0 [ 31.851661][ T289] Code: 07 fe c1 38 c1 0f 8c 2c ff ff ff 48 89 df 49 89 d7 e8 c9 aa cd ff 4c 89 fa e9 19 ff ff ff e8 cc 58 89 ff 0f 0b e8 c5 58 89 ff <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 b8 a4 70 30 e0 55 [ 31.871691][ T289] RSP: 0018:ffffc90000da7740 EFLAGS: 00010293 [ 31.877863][ T289] RAX: ffffffff81e68e0b RBX: 0000010000000006 RCX: ffff88810c002880 [ 31.886169][ T289] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006 [ 31.894372][ T289] RBP: ffffc90000da7790 R08: dffffc0000000000 R09: ffffed102014e44b [ 31.902587][ T289] R10: ffffed102014e44b R11: 1ffff1102014e44a R12: ffff88810f9d0168 [ 31.910677][ T289] R13: ffffc90000da7820 R14: 0000010000000005 R15: 000000000000003c [ 31.919009][ T289] FS: 00005555724e6380(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 [ 31.927963][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.934781][ T289] CR2: 000055f3d440d4c0 CR3: 0000000125f24000 CR4: 00000000003506a0 [ 31.942794][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.950893][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.958863][ T289] Kernel panic - not syncing: Fatal exception [ 31.965316][ T289] Kernel Offset: disabled [ 31.969837][ T289] Rebooting in 86400 seconds..