./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1212675431 <...> Warning: Permanently added '10.128.0.226' (ED25519) to the list of known hosts. execve("./syz-executor1212675431", ["./syz-executor1212675431"], 0x7ffe9e43ccc0 /* 10 vars */) = 0 brk(NULL) = 0x5555558bc000 brk(0x5555558bcd00) = 0x5555558bcd00 arch_prctl(ARCH_SET_FS, 0x5555558bc380) = 0 set_tid_address(0x5555558bc650) = 354 set_robust_list(0x5555558bc660, 24) = 0 rseq(0x5555558bcca0, 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-executor1212675431", 4096) = 28 getrandom("\xb2\xdd\xf8\x9c\xbb\x2a\x5c\xb3", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x5555558bcd00 brk(0x5555558ddd00) = 0x5555558ddd00 brk(0x5555558de000) = 0x5555558de000 mprotect(0x7efc883fd000, 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 memfd_create("syzkaller", 0) = 3 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7efc7ff4b000 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 munmap(0x7efc7ff4b000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 20.946061][ T23] audit: type=1400 audit(1712403064.739:66): avc: denied { execmem } for pid=354 comm="syz-executor121" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 20.949747][ T23] audit: type=1400 audit(1712403064.749:67): avc: denied { read write } for pid=354 comm="syz-executor121" name="loop0" dev="devtmpfs" ino=9325 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.954208][ T23] audit: type=1400 audit(1712403064.749:68): avc: denied { open } for pid=354 comm="syz-executor121" path="/dev/loop0" dev="devtmpfs" ino=9325 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 20.957674][ T23] audit: type=1400 audit(1712403064.749:69): avc: denied { ioctl } for pid=354 comm="syz-executor121" path="/dev/loop0" dev="devtmpfs" ino=9325 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 close(4) = 0 mkdir("./file0", 0777) = 0 [ 21.050398][ T23] audit: type=1400 audit(1712403064.849:70): avc: denied { mounton } for pid=354 comm="syz-executor121" path="/root/file0" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 mount("/dev/loop0", "./file0", "ext3", MS_MGC_VAL|MS_NOSUID|MS_NODEV, "jqfmt=vfsold,resgid=0x000000000000ee00,noblock_validity,noload,data_err=ignore,usrjquota=,init_itabl"...) = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 [ 21.147537][ T354] EXT4-fs (loop0): mounting ext3 file system using the ext4 subsystem [ 21.157994][ T354] EXT4-fs (loop0): 1 truncate cleaned up [ 21.163438][ T354] EXT4-fs (loop0): mounted filesystem without journal. Opts: jqfmt=vfsold,resgid=0x000000000000ee00,noblock_validity,noload,data_err=ignore,usrjquota=,init_itable=0x0000000000000601,max_dir_size_kb=0x0000000000000003,,errors=continue openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 open("./bus", O_RDWR|O_CREAT|O_SYNC|O_NOATIME, 000) = 4 mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 memfd_create("syzkaller", 0) = 5 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7efc7ff4b000 write(5, "\x60\x1c\x6d\x6b\x64\x20\x00\x66\x81\x7c\xe1\x00\x08\x08\x01\x00\x02\x40\x00\x40\x00\xf8\x01\x00\x10\x00\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\x90\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 131072) = 131072 munmap(0x7efc7ff4b000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 6 ioctl(6, LOOP_SET_FD, 5) = -1 EBUSY (Device or resource busy) ioctl(6, LOOP_CLR_FD) = 0 ioctl(6, LOOP_SET_FD, 5) = -1 EBUSY (Device or resource busy) close(6) = 0 close(5) = 0 open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 5 openat(AT_FDCWD, "memory.events", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 6 write(6, "\x76\x66\x61\x74\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x2e\x2f\x62\x75\x73\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 65228) = 65228 write(5, "\x6d\x65\x6d\x6f\x72\x79\x2e\x65\x76\x65\x6e\x74\x73\x00\x1a\x60\x29\x59\x81\x46\xe6\xbe\x16\x6e\x41\xad\x0d\xbd\x40\x54\x03\x3c\x9f\x33\xbb\xda\x82\x24\xa2\xf3\xd7\x72\xe7\x63\x6e\x48\xb3\x3c\xbf\x70\x83\x72\xe8\xf1\xb9\x93\x3e\xc5\x12\x77\x43\xbe\x22\x06\x20\x9e\xf0\x2d\xf9\xcb\xf2\xf6\xe8\x80\xd3\x38\x2f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 262144 exit_group(0) = ? [ 21.185918][ T23] audit: type=1400 audit(1712403064.979:71): avc: denied { mount } for pid=354 comm="syz-executor121" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 21.217353][ T23] audit: type=1400 audit(1712403065.019:72): avc: denied { write } for pid=354 comm="syz-executor121" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.239098][ T23] audit: type=1400 audit(1712403065.019:73): avc: denied { add_name } for pid=354 comm="syz-executor121" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 21.242958][ T354] ------------[ cut here ]------------ [ 21.259643][ T23] audit: type=1400 audit(1712403065.019:74): avc: denied { create } for pid=354 comm="syz-executor121" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.264837][ T354] kernel BUG at fs/ext4/ext4.h:2984! [ 21.284913][ T23] audit: type=1400 audit(1712403065.019:75): avc: denied { read write open } for pid=354 comm="syz-executor121" path="/root/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 21.290444][ T354] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 21.319428][ T354] CPU: 0 PID: 354 Comm: syz-executor121 Not tainted 5.4.268-syzkaller-00012-gd0d34dcb02cc #0 [ 21.329403][ T354] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 21.339308][ T354] RIP: 0010:ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.345289][ T354] Code: ff e8 2b c0 c9 ff e9 0a f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 31 c0 c9 ff e9 48 f3 ff ff e8 d7 eb 99 ff <0f> 0b e8 d0 eb 99 ff 0f 0b e8 c9 eb 99 ff 0f 0b e8 c2 eb 99 ff 0f [ 21.364732][ T354] RSP: 0018:ffff8881dbf4fa48 EFLAGS: 00010293 [ 21.370631][ T354] RAX: ffffffff81ca5b49 RBX: 0000000000000001 RCX: ffff8881dbf33f00 [ 21.378443][ T354] RDX: 0000000000000000 RSI: 00000000fffa8e06 RDI: 0000000000000001 [ 21.386257][ T354] RBP: ffff8881db8f2000 R08: ffffffff81ca4cf2 R09: ffffed103d27c76c [ 21.394071][ T354] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1103b7bf87e [ 21.401878][ T354] R13: dffffc0000000000 R14: 00000000fffa8e06 R15: ffff8881dbdfc3f0 [ 21.409689][ T354] FS: 00005555558bc380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.418462][ T354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.424880][ T354] CR2: 00007efc883d11c8 CR3: 00000001ed702000 CR4: 00000000003406b0 [ 21.432690][ T354] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.440501][ T354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.448312][ T354] Call Trace: [ 21.451446][ T354] ? __die+0xb4/0x100 [ 21.455260][ T354] ? die+0x26/0x50 [ 21.458818][ T354] ? do_trap+0x1e7/0x340 [ 21.462924][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.468278][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.473658][ T354] ? do_invalid_op+0xfb/0x110 [ 21.478173][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.483555][ T354] ? invalid_op+0x1e/0x30 [ 21.487720][ T354] ? ext4_mb_load_buddy_gfp+0xd2/0xf40 [ 21.493015][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.498395][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.503778][ T354] ? ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.509164][ T354] ? __kasan_slab_free+0x233/0x270 [ 21.514106][ T354] ? locks_remove_posix+0x660/0x660 [ 21.519149][ T354] ? ext4_get_group_number+0xdd/0x190 [ 21.524346][ T354] ext4_discard_preallocations+0x603/0xb90 [ 21.529992][ T354] ? ext4_exit_mballoc+0xf0/0xf0 [ 21.534763][ T354] ? __fsnotify_parent+0x310/0x310 [ 21.539709][ T354] ext4_release_file+0x165/0x300 [ 21.544484][ T354] ? ext4_file_open+0x5e0/0x5e0 [ 21.549172][ T354] __fput+0x262/0x680 [ 21.552999][ T354] task_work_run+0x140/0x170 [ 21.557423][ T354] do_exit+0xcaf/0x2bc0 [ 21.561410][ T354] ? put_task_struct+0x80/0x80 [ 21.566012][ T354] ? syscall_trace_enter+0x650/0x940 [ 21.571136][ T354] do_group_exit+0x138/0x300 [ 21.575561][ T354] __x64_sys_exit_group+0x3b/0x40 [ 21.580416][ T354] do_syscall_64+0xca/0x1c0 [ 21.584760][ T354] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 21.590480][ T354] Modules linked in: [ 21.594593][ T354] ---[ end trace 545110f050164e1e ]--- [ 21.599880][ T354] RIP: 0010:ext4_mb_load_buddy_gfp+0xf29/0xf40 [ 21.605840][ T354] Code: ff e8 2b c0 c9 ff e9 0a f3 ff ff 89 f9 80 e1 07 80 c1 03 38 c1 0f 8c 52 f3 ff ff e8 31 c0 c9 ff e9 48 f3 ff ff e8 d7 eb 99 ff <0f> 0b e8 d0 eb 99 ff 0f 0b e8 c9 eb 99 ff 0f 0b e8 c2 eb 99 ff 0f [ 21.625363][ T354] RSP: 0018:ffff8881dbf4fa48 EFLAGS: 00010293 [ 21.631398][ T354] RAX: ffffffff81ca5b49 RBX: 0000000000000001 RCX: ffff8881dbf33f00 [ 21.639238][ T354] RDX: 0000000000000000 RSI: 00000000fffa8e06 RDI: 0000000000000001 [ 21.646994][ T354] RBP: ffff8881db8f2000 R08: ffffffff81ca4cf2 R09: ffffed103d27c76c [ 21.654784][ T354] R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff1103b7bf87e [ 21.662623][ T354] R13: dffffc0000000000 R14: 00000000fffa8e06 R15: ffff8881dbdfc3f0 [ 21.670433][ T354] FS: 00005555558bc380(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 [ 21.679192][ T354] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.685603][ T354] CR2: 00007efc883d11c8 CR3: 00000001e464b000 CR4: 00000000003406b0 [ 21.693461][ T354] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.701233][ T354] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.709053][ T354] Kernel panic - not syncing: Fatal exception [ 21.715000][ T354] Kernel Offset: disabled [ 21.719098][ T354] Rebooting in 86400 seconds..