./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor548286663 <...> Warning: Permanently added '10.128.0.121' (ED25519) to the list of known hosts. execve("./syz-executor548286663", ["./syz-executor548286663"], 0x7ffca72ab1c0 /* 10 vars */) = 0 brk(NULL) = 0x5555565d2000 brk(0x5555565d2d00) = 0x5555565d2d00 arch_prctl(ARCH_SET_FS, 0x5555565d2380) = 0 set_tid_address(0x5555565d2650) = 287 set_robust_list(0x5555565d2660, 24) = 0 rseq(0x5555565d2ca0, 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-executor548286663", 4096) = 27 getrandom("\x94\x64\x88\x6a\x81\x41\x05\x8c", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555565d2d00 brk(0x5555565f3d00) = 0x5555565f3d00 brk(0x5555565f4000) = 0x5555565f4000 mprotect(0x7ff25ea23000, 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 mkdir("./syzkaller.MiYFkr", 0700) = 0 chmod("./syzkaller.MiYFkr", 0777) = 0 chdir("./syzkaller.MiYFkr") = 0 mkdir("./0", 0777) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3 ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address) close(3) = 0 clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x5555565d2650) = 289 ./strace-static-x86_64: Process 289 attached [pid 289] set_robust_list(0x5555565d2660, 24) = 0 [pid 289] chdir("./0") = 0 [pid 289] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0 [pid 289] setpgid(0, 0) = 0 [pid 289] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3 [pid 289] write(3, "1000", 4) = 4 [pid 289] close(3) = 0 [pid 289] symlink("/dev/binderfs", "./binderfs") = 0 [pid 289] memfd_create("syzkaller", 0) = 3 [pid 289] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7ff256570000 [pid 289] 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"..., 262144) = 262144 [pid 289] munmap(0x7ff256570000, 138412032) = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_SET_FD, 3) = 0 [pid 289] close(3) = 0 [pid 289] close(4) = 0 [pid 289] mkdir("./bus", 0777) = 0 [ 20.868862][ T24] audit: type=1400 audit(1713046883.119:66): avc: denied { execmem } for pid=287 comm="syz-executor548" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.874432][ T24] audit: type=1400 audit(1713046883.119:67): avc: denied { read write } for pid=287 comm="syz-executor548" name="loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.878036][ T24] audit: type=1400 audit(1713046883.119:68): avc: denied { open } for pid=287 comm="syz-executor548" path="/dev/loop0" dev="devtmpfs" ino=111 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.882030][ T24] audit: type=1400 audit(1713046883.119:69): avc: denied { ioctl } for pid=287 comm="syz-executor548" path="/dev/loop0" dev="devtmpfs" ino=111 ioctlcmd=0x4c01 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.930188][ T289] EXT4-fs (loop0): Mount option "noacl" will be removed by 3.5 [ 20.930188][ T289] Contact linux-ext4@vger.kernel.org if you think we should keep it. [ 20.930188][ T289] [ 20.930728][ T24] audit: type=1400 audit(1713046883.179:70): avc: denied { mounton } for pid=289 comm="syz-executor548" path="/root/syzkaller.MiYFkr/0/bus" dev="sda1" ino=1930 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 20.963863][ T289] EXT4-fs (loop0): 1 truncate cleaned up [pid 289] mount("/dev/loop0", "./bus", "ext4", MS_NODEV|MS_SYNCHRONOUS|MS_NOSYMFOLLOW|MS_NOATIME|MS_POSIXACL|MS_I_VERSION|MS_STRICTATIME|0x200, "journal_ioprio=0x0000000000000003,noacl,abort,nobarrier,sysvgroups,debug_want_extra_isize=0x00000000"...) = 0 [pid 289] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 [pid 289] chdir("./bus") = 0 [pid 289] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 [pid 289] ioctl(4, LOOP_CLR_FD) = 0 [pid 289] close(4) = 0 [pid 289] creat("./bus", 000) = 4 [pid 289] mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 [pid 289] open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_DIRECT|O_CLOEXEC) = 5 [pid 289] mmap(0x20000000, 11755520, PROT_WRITE, MAP_SHARED|MAP_FIXED|MAP_POPULATE|MAP_STACK, 5, 0) = 0x20000000 [pid 289] ioctl(-1, SIOCDEVPRIVATE, 0x20000100) = -1 EBADF (Bad file descriptor) [pid 289] exit_group(0) = ? [pid 289] +++ exited with 0 +++ --- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=289, si_uid=0, si_status=0, si_utime=0, si_stime=4} --- umount2("./0", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EINVAL (Invalid argument) openat(AT_FDCWD, "./0", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3 newfstatat(3, "", {st_mode=S_IFDIR|0700, st_size=4096, ...}, AT_EMPTY_PATH) = 0 getdents64(3, 0x5555565d36f0 /* 4 entries */, 32768) = 104 umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) newfstatat(AT_FDCWD, "./0/bus", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_SYMLINK_NOFOLLOW) = 0 umount2("./0/bus", MNT_FORCE|UMOUNT_NOFOLLOW) = -1 EBUSY (Device or resource busy) openat(AT_FDCWD, "./0/bus", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 4 newfstatat(4, "", {st_mode=S_IFDIR|0755, st_size=1024, ...}, AT_EMPTY_PATH) = 0 [ 20.978358][ T289] EXT4-fs (loop0): mounted filesystem without journal. Opts: journal_ioprio=0x0000000000000003,noacl,abort,nobarrier,sysvgroups,debug_want_extra_isize=0x0000000000000006,noinit_itable,,errors=continue [ 20.998400][ T24] audit: type=1400 audit(1713046883.249:71): avc: denied { mount } for pid=289 comm="syz-executor548" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.007751][ T287] ------------[ cut here ]------------ [ 21.025902][ T287] kernel BUG at fs/ext4/inode.c:5263! [ 21.031167][ T287] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 21.031528][ T24] audit: type=1400 audit(1713046883.249:72): avc: denied { write } for pid=289 comm="syz-executor548" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.036990][ T287] CPU: 0 PID: 287 Comm: syz-executor548 Not tainted 5.10.209-syzkaller-00002-g4e1bc8d8e8ae #0 [ 21.058832][ T24] audit: type=1400 audit(1713046883.249:73): avc: denied { add_name } for pid=289 comm="syz-executor548" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.068667][ T287] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 21.068698][ T287] RIP: 0010:ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.068716][ T287] Code: 79 ca ff e9 0f f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 21 f1 ff ff 48 89 df e8 99 79 ca ff e9 14 f1 ff ff e8 af fd 8c ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 [ 21.089528][ T24] audit: type=1400 audit(1713046883.249:74): avc: denied { create } for pid=289 comm="syz-executor548" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.099050][ T287] RSP: 0018:ffffc90000b979a0 EFLAGS: 00010293 [ 21.099061][ T287] RAX: ffffffff81ddaa41 RBX: 0000000000000000 RCX: ffff8881183e0000 [ 21.099067][ T287] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 [ 21.099078][ T287] RBP: ffffc90000b97ab0 R08: ffffffff81dd865d R09: ffffed102203587f [ 21.099091][ T287] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 21.105168][ T24] audit: type=1400 audit(1713046883.249:75): avc: denied { write open } for pid=289 comm="syz-executor548" path="/root/syzkaller.MiYFkr/0/bus/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.125043][ T287] R13: 00000000ffffffff R14: 0000000000000000 R15: ffff88811e1db000 [ 21.125051][ T287] FS: 00005555565d2380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.125057][ T287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.125075][ T287] CR2: 00005555565e3738 CR3: 000000011e7d9000 CR4: 00000000003506b0 [ 21.238522][ T287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.246326][ T287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.254138][ T287] Call Trace: [ 21.257270][ T287] ? __die_body+0x62/0xb0 [ 21.261430][ T287] ? die+0x88/0xb0 [ 21.264989][ T287] ? do_trap+0x1a4/0x310 [ 21.269081][ T287] ? ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.274757][ T287] ? handle_invalid_op+0x95/0xc0 [ 21.279488][ T287] ? ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.284862][ T287] ? exc_invalid_op+0x32/0x50 [ 21.289381][ T287] ? asm_exc_invalid_op+0x12/0x20 [ 21.294354][ T287] ? ext4_mark_iloc_dirty+0x1a6d/0x3e60 [ 21.299705][ T287] ? ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.305129][ T287] ? ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.310474][ T287] __ext4_mark_inode_dirty+0x4fc/0x7b0 [ 21.315761][ T287] ? sb_end_intwrite+0x110/0x110 [ 21.320735][ T287] ? memset+0x35/0x40 [ 21.324553][ T287] ? ktime_get_coarse_real_ts64+0xe1/0xf0 [ 21.330108][ T287] ? __kasan_check_read+0x11/0x20 [ 21.334967][ T287] ? __ext4_journal_start_sb+0x2e1/0x4a0 [ 21.340550][ T287] ext4_dirty_inode+0xdd/0x120 [ 21.345151][ T287] ? __ext4_expand_extra_isize+0x3f0/0x3f0 [ 21.350795][ T287] __mark_inode_dirty+0xd0/0x9d0 [ 21.355583][ T287] ? memcpy+0x56/0x70 [ 21.359388][ T287] touch_atime+0x2ff/0x4c0 [ 21.363640][ T287] ? current_time+0x2f0/0x2f0 [ 21.368160][ T287] iterate_dir+0x4a1/0x580 [ 21.372402][ T287] ? ext4_dir_llseek+0x4c0/0x4c0 [ 21.377396][ T287] __se_sys_getdents64+0x1c1/0x460 [ 21.382340][ T287] ? __x64_sys_getdents64+0x90/0x90 [ 21.387375][ T287] ? filldir+0x680/0x680 [ 21.391542][ T287] ? debug_smp_processor_id+0x17/0x20 [ 21.396740][ T287] ? fpregs_assert_state_consistent+0xb6/0xe0 [ 21.403444][ T287] ? irqentry_exit_to_user_mode+0x4d/0x80 [ 21.409004][ T287] __x64_sys_getdents64+0x7b/0x90 [ 21.413859][ T287] do_syscall_64+0x34/0x70 [ 21.418110][ T287] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 21.423862][ T287] RIP: 0033:0x7ff25e9d71a3 [ 21.428090][ T287] Code: c1 66 0f 1f 44 00 00 48 83 c4 08 48 89 ef 5b 5d e9 82 48 fb ff 66 90 b8 ff ff ff 7f 48 39 c2 48 0f 47 d0 b8 d9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 c7 c2 b8 ff ff ff f7 d8 [ 21.447617][ T287] RSP: 002b:00007fff47cf0578 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9 [ 21.455865][ T287] RAX: ffffffffffffffda RBX: 00005555565db730 RCX: 00007ff25e9d71a3 [ 21.463672][ T287] RDX: 0000000000008000 RSI: 00005555565db730 RDI: 0000000000000004 [ 21.471485][ T287] RBP: 00005555565db704 R08: 0000000000000000 R09: 0000000000000000 [ 21.479469][ T287] R10: 0000000000001000 R11: 0000000000000293 R12: ffffffffffffffb8 [ 21.487280][ T287] R13: 0000000000000010 R14: 00005555565db700 R15: 00007fff47cf27f0 [ 21.495100][ T287] Modules linked in: [ 21.499072][ T287] ---[ end trace dd63cd6096c9484d ]--- [ 21.504310][ T287] RIP: 0010:ext4_mark_iloc_dirty+0x3e51/0x3e60 [ 21.510305][ T287] Code: 79 ca ff e9 0f f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 21 f1 ff ff 48 89 df e8 99 79 ca ff e9 14 f1 ff ff e8 af fd 8c ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 55 48 89 e5 41 57 41 [ 21.529755][ T287] RSP: 0018:ffffc90000b979a0 EFLAGS: 00010293 [ 21.535826][ T287] RAX: ffffffff81ddaa41 RBX: 0000000000000000 RCX: ffff8881183e0000 [ 21.543762][ T287] RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000000 [ 21.551752][ T287] RBP: ffffc90000b97ab0 R08: ffffffff81dd865d R09: ffffed102203587f [ 21.559625][ T287] R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000 [ 21.567686][ T287] R13: 00000000ffffffff R14: 0000000000000000 R15: ffff88811e1db000 [ 21.575533][ T287] FS: 00005555565d2380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 21.584339][ T287] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.590713][ T287] CR2: 00005555565e3738 CR3: 000000011e7d9000 CR4: 00000000003506b0 [ 21.598522][ T287] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.606818][ T287] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.614727][ T287] Kernel panic - not syncing: Fatal exception [ 21.620858][ T287] Kernel Offset: disabled [ 21.624982][ T287] Rebooting in 86400 seconds..