./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4007042967 <...> Warning: Permanently added '10.128.10.26' (ED25519) to the list of known hosts. execve("./syz-executor4007042967", ["./syz-executor4007042967"], 0x7ffd5bacae70 /* 10 vars */) = 0 brk(NULL) = 0x555556b1d000 brk(0x555556b1dd00) = 0x555556b1dd00 arch_prctl(ARCH_SET_FS, 0x555556b1d380) = 0 set_tid_address(0x555556b1d650) = 356 set_robust_list(0x555556b1d660, 24) = 0 rseq(0x555556b1dca0, 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-executor4007042967", 4096) = 28 getrandom("\xe7\x33\x0f\x11\x1f\x05\x20\x35", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555556b1dd00 brk(0x555556b3ed00) = 0x555556b3ed00 brk(0x555556b3f000) = 0x555556b3f000 mprotect(0x7f66b55b5000, 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) = 0x7f66ad103000 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(0x7f66ad103000, 138412032) = 0 [ 23.773179][ T23] audit: type=1400 audit(1713668022.390:66): avc: denied { execmem } for pid=356 comm="syz-executor400" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 [ 23.800299][ T23] audit: type=1400 audit(1713668022.420:67): avc: denied { read write } for pid=356 comm="syz-executor400" name="loop0" dev="devtmpfs" ino=9154 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.824710][ T23] audit: type=1400 audit(1713668022.420:68): avc: denied { open } for pid=356 comm="syz-executor400" path="/dev/loop0" dev="devtmpfs" ino=9154 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 23.848849][ T23] audit: type=1400 audit(1713668022.440:69): avc: denied { ioctl } for pid=356 comm="syz-executor400" path="/dev/loop0" dev="devtmpfs" ino=9154 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("./bus", 0777) = 0 [ 23.932200][ T23] audit: type=1400 audit(1713668022.550:70): avc: denied { mounton } for pid=356 comm="syz-executor400" path="/root/bus" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 mount("/dev/loop0", "./bus", "ext4", MS_SYNCHRONOUS|MS_NODIRATIME|MS_REC|MS_I_VERSION, ",errors=continue") = 0 openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3 chdir("./bus") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 chdir("./file0") = 0 memfd_create("syzkaller", 0) = 4 mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f66ad103000 write(4, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 524288) = 524288 munmap(0x7f66ad103000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 5 ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) ioctl(5, LOOP_CLR_FD) = 0 ioctl(5, LOOP_SET_FD, 4) = -1 EBUSY (Device or resource busy) close(5) = 0 close(4) = 0 [ 24.020455][ T356] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 24.029527][ T23] audit: type=1400 audit(1713668022.650:71): avc: denied { mount } for pid=356 comm="syz-executor400" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 24.029551][ T356] ext4 filesystem being mounted at /root/bus supports timestamps until 2038 (0x7fffffff) openat(AT_FDCWD, "cgroup.controllers", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_APPEND|FASYNC|0x18, 000) = 4 [ 24.083365][ T23] audit: type=1400 audit(1713668022.700:72): avc: denied { write } for pid=356 comm="syz-executor400" name="file0" dev="loop0" ino=12 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 24.105513][ T23] audit: type=1400 audit(1713668022.700:73): avc: denied { add_name } for pid=356 comm="syz-executor400" name="cgroup.controllers" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 open("./bus", O_RDWR|O_CREAT|O_SYNC|O_NOATIME, 000) = 5 mount("/dev/loop0", "./bus", NULL, MS_BIND, NULL) = 0 open("./bus", O_RDWR|O_NOCTTY|O_SYNC|O_NOATIME|0x3c) = 6 write(6, "\x23\x21\x20\x0a\x73\x00\x2e\x63\x6f\x6e\x74\x72\x6f\x6c\x6c\x65\x72\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 34136651) = 1048576 [ 24.127294][ T23] audit: type=1400 audit(1713668022.700:74): avc: denied { create } for pid=356 comm="syz-executor400" name="cgroup.controllers" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.148704][ T23] audit: type=1400 audit(1713668022.740:75): avc: denied { read append open } for pid=356 comm="syz-executor400" path="/root/bus/file0/cgroup.controllers" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 24.159676][ T356] ------------[ cut here ]------------ [ 24.179222][ T356] kernel BUG at fs/ext4/ext4.h:2984! [ 24.184407][ T356] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 24.190238][ T356] CPU: 1 PID: 356 Comm: syz-executor400 Not tainted 5.4.268-syzkaller-00003-g2d5d8240a7cb #0 [ 24.200219][ T356] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 [ 24.210130][ T356] RIP: 0010:ext4_trim_fs+0x1e69/0x1e80 [ 24.215409][ T356] Code: 80 e1 07 80 c1 03 38 c1 0f 8c 40 e7 ff ff 48 8d bc 24 f0 01 00 00 e8 76 c4 c8 ff e9 2e e7 ff ff e8 bc a8 6f ff e8 87 f0 98 ff <0f> 0b e8 80 f0 98 ff 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f [ 24.234849][ T356] RSP: 0018:ffff8881dbf1f500 EFLAGS: 00010293 [ 24.240776][ T356] RAX: ffffffff81cb5699 RBX: 0000000000000001 RCX: ffff8881dbc30fc0 [ 24.248562][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000050186 [ 24.256374][ T356] RBP: ffff8881dbf1f770 R08: ffffffff81cb4014 R09: 0000000000000003 [ 24.264186][ T356] R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000001 [ 24.272004][ T356] R13: dffffc0000000000 R14: ffff8881ddfae000 R15: 0000000000050186 [ 24.279815][ T356] FS: 0000555556b1d380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.288583][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.294999][ T356] CR2: 000000002010007f CR3: 00000001dbcc4000 CR4: 00000000003406a0 [ 24.302811][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.310621][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.318430][ T356] Call Trace: [ 24.321567][ T356] ? __die+0xb4/0x100 [ 24.325380][ T356] ? die+0x26/0x50 [ 24.328934][ T356] ? do_trap+0x1e7/0x340 [ 24.333017][ T356] ? ext4_trim_fs+0x1e69/0x1e80 [ 24.337701][ T356] ? ext4_trim_fs+0x1e69/0x1e80 [ 24.342390][ T356] ? do_invalid_op+0xfb/0x110 [ 24.346930][ T356] ? ext4_trim_fs+0x1e69/0x1e80 [ 24.351600][ T356] ? invalid_op+0x1e/0x30 [ 24.355793][ T356] ? ext4_trim_fs+0x7e4/0x1e80 [ 24.360355][ T356] ? ext4_trim_fs+0x1e69/0x1e80 [ 24.365041][ T356] ? ext4_trim_fs+0x1e69/0x1e80 [ 24.369731][ T356] ? ext4_group_add_blocks+0xde0/0xde0 [ 24.375023][ T356] ? cap_capable+0x1b1/0x250 [ 24.379451][ T356] ext4_ioctl+0x2168/0x3ff0 [ 24.383791][ T356] ? asan.module_dtor+0x20/0x20 [ 24.388480][ T356] ? call_rcu+0x10/0x10 [ 24.392476][ T356] ? slow_avc_audit+0x26c/0x3c0 [ 24.397262][ T356] ? avc_get_hash_stats+0x1a0/0x1a0 [ 24.402277][ T356] ? avc_update_node+0x897/0x960 [ 24.407062][ T356] ? _raw_spin_unlock_irqrestore+0x57/0x80 [ 24.412692][ T356] ? avc_denied+0x15c/0x1d0 [ 24.417033][ T356] ? avc_has_extended_perms+0xa4c/0x1120 [ 24.422597][ T356] ? avc_has_extended_perms+0xafc/0x1120 [ 24.428060][ T356] ? avc_flush+0x1f0/0x1f0 [ 24.432325][ T356] ? finish_task_switch+0x130/0x590 [ 24.437343][ T356] ? _raw_spin_lock_irqsave+0x210/0x210 [ 24.442724][ T356] ? common_interrupt+0xa/0xf [ 24.447255][ T356] ? asan.module_dtor+0x20/0x20 [ 24.453140][ T356] ? do_vfs_ioctl+0x2a6/0x1720 [ 24.457725][ T356] ? do_vfs_ioctl+0xe87/0x1720 [ 24.462327][ T356] ? asan.module_dtor+0x20/0x20 [ 24.467019][ T356] do_vfs_ioctl+0x742/0x1720 [ 24.471442][ T356] ? ioctl_preallocate+0x250/0x250 [ 24.476512][ T356] ? check_preemption_disabled+0x153/0x320 [ 24.482289][ T356] ? syscall_trace_enter+0x650/0x940 [ 24.487411][ T356] ? do_syscall_64+0x1c0/0x1c0 [ 24.492102][ T356] ? switch_fpu_return+0x1d4/0x410 [ 24.497194][ T356] ? security_file_ioctl+0x7d/0xa0 [ 24.502158][ T356] __x64_sys_ioctl+0xd4/0x110 [ 24.506664][ T356] do_syscall_64+0xca/0x1c0 [ 24.511142][ T356] entry_SYSCALL_64_after_hwframe+0x5c/0xc1 [ 24.516916][ T356] Modules linked in: [ 24.520895][ T356] ---[ end trace a7a596f66de4bf86 ]--- [ 24.526166][ T356] RIP: 0010:ext4_trim_fs+0x1e69/0x1e80 [ 24.531502][ T356] Code: 80 e1 07 80 c1 03 38 c1 0f 8c 40 e7 ff ff 48 8d bc 24 f0 01 00 00 e8 76 c4 c8 ff e9 2e e7 ff ff e8 bc a8 6f ff e8 87 f0 98 ff <0f> 0b e8 80 f0 98 ff 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f [ 24.550911][ T356] RSP: 0018:ffff8881dbf1f500 EFLAGS: 00010293 [ 24.556873][ T356] RAX: ffffffff81cb5699 RBX: 0000000000000001 RCX: ffff8881dbc30fc0 [ 24.564725][ T356] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000050186 [ 24.572512][ T356] RBP: ffff8881dbf1f770 R08: ffffffff81cb4014 R09: 0000000000000003 [ 24.580341][ T356] R10: ffffffffffffffff R11: dffffc0000000001 R12: 0000000000000001 [ 24.588128][ T356] R13: dffffc0000000000 R14: ffff8881ddfae000 R15: 0000000000050186 [ 24.595956][ T356] FS: 0000555556b1d380(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 24.604732][ T356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 24.611140][ T356] CR2: 000000002010007f CR3: 00000001dbcc4000 CR4: 00000000003406a0 [ 24.619021][ T356] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 24.626957][ T356] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 24.634755][ T356] Kernel panic - not syncing: Fatal exception [ 24.640842][ T356] Kernel Offset: disabled [ 24.644960][ T356] Rebooting in 86400 seconds..