./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3962496478 <...> syzkaller syzkaller login: [ 17.978157][ T28] kauditd_printk_skb: 47 callbacks suppressed [ 17.978172][ T28] audit: type=1400 audit(1748844064.387:59): avc: denied { transition } for pid=224 comm="sshd-session" path="/bin/sh" dev="sda1" ino=90 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 17.985633][ T28] audit: type=1400 audit(1748844064.387:60): avc: denied { noatsecure } for pid=224 comm="sshd-session" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 17.990457][ T28] audit: type=1400 audit(1748844064.387:61): avc: denied { write } for pid=224 comm="sh" path="pipe:[14500]" dev="pipefs" ino=14500 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 17.996600][ T28] audit: type=1400 audit(1748844064.387:62): avc: denied { rlimitinh } for pid=224 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 18.008907][ T28] audit: type=1400 audit(1748844064.387:63): avc: denied { siginh } for pid=224 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.0.140' (ED25519) to the list of known hosts. execve("./syz-executor3962496478", ["./syz-executor3962496478"], 0x7ffff1dd0a00 /* 10 vars */) = 0 brk(NULL) = 0x555585e60000 brk(0x555585e60d00) = 0x555585e60d00 arch_prctl(ARCH_SET_FS, 0x555585e60380) = 0 set_tid_address(0x555585e60650) = 289 set_robust_list(0x555585e60660, 24) = 0 rseq(0x555585e60ca0, 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-executor3962496478", 4096) = 28 getrandom("\xf2\x04\xbc\xe2\x88\xb1\xf6\x01", 8, GRND_NONBLOCK) = 8 brk(NULL) = 0x555585e60d00 brk(0x555585e81d00) = 0x555585e81d00 brk(0x555585e82000) = 0x555585e82000 mprotect(0x7f9513d39000, 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, 0) = 0x200000000000 mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0executing program ) = 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) = 0x7f950b888000 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(0x7f950b888000, 138412032) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 close(4) = 0 mkdir("./file0", 0777) = 0 [ 28.298537][ T28] audit: type=1400 audit(1748844074.707:64): avc: denied { execmem } for pid=289 comm="syz-executor396" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 28.310720][ T289] loop0: detected capacity change from 0 to 2048 [ 28.321615][ T28] audit: type=1400 audit(1748844074.717:65): avc: denied { read write } for pid=289 comm="syz-executor396" 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 [ 28.356261][ T28] audit: type=1400 audit(1748844074.717:66): avc: denied { open } for pid=289 comm="syz-executor396" 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", "./file0", "ext4", MS_DIRSYNC|MS_NOATIME|MS_POSIXACL|MS_LAZYTIME, ",errors=continue") = 0 openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3 chdir("./file0") = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 [ 28.384174][ T28] audit: type=1400 audit(1748844074.727:67): avc: denied { ioctl } for pid=289 comm="syz-executor396" 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 [ 28.414330][ T28] audit: type=1400 audit(1748844074.747:68): avc: denied { mounton } for pid=289 comm="syz-executor396" path="/root/file0" dev="sda1" ino=2024 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 28.417665][ T289] EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none. 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 [ 28.447470][ T28] audit: type=1400 audit(1748844074.857:69): avc: denied { mount } for pid=289 comm="syz-executor396" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 28.451515][ T289] ------------[ cut here ]------------ [ 28.475926][ T289] kernel BUG at fs/ext4/inline.c:236! [ 28.481910][ T289] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 28.483206][ T28] audit: type=1400 audit(1748844074.857:70): avc: denied { write } for pid=289 comm="syz-executor396" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 28.488273][ T289] CPU: 0 PID: 289 Comm: syz-executor396 Not tainted 6.1.138-syzkaller-00046-gdb710ea87c32 #0 [ 28.513279][ T28] audit: type=1400 audit(1748844074.857:71): avc: denied { add_name } for pid=289 comm="syz-executor396" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 28.523791][ T289] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 [ 28.523809][ T289] RIP: 0010:ext4_write_inline_data+0x3ab/0x3b0 [ 28.563717][ T289] Code: 07 fe c1 38 c1 0f 8c 2c ff ff ff 48 89 df 49 89 d7 e8 f9 a9 cd ff 4c 89 fa e9 19 ff ff ff e8 bc 51 89 ff 0f 0b e8 b5 51 89 ff <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 b8 a4 70 30 e0 55 [ 28.584156][ T289] RSP: 0018:ffffc90000de7740 EFLAGS: 00010293 [ 28.590235][ T289] RAX: ffffffff81e69f5b RBX: 0000010000000006 RCX: ffff88810e1f0000 [ 28.598483][ T289] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006 [ 28.606652][ T289] RBP: ffffc90000de7790 R08: dffffc0000000000 R09: ffffed102016904b [ 28.614828][ T289] R10: ffffed102016904b R11: 1ffff1102016904a R12: ffff888100560720 [ 28.623182][ T289] R13: ffffc90000de7820 R14: 0000010000000005 R15: 000000000000003c [ 28.631783][ T289] FS: 0000555585e60380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 28.641064][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 28.648338][ T289] CR2: 00005562bea4d608 CR3: 0000000126e0a000 CR4: 00000000003506b0 [ 28.656660][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 28.665242][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 28.673551][ T289] Call Trace: [ 28.676910][ T289] [ 28.680411][ T289] ext4_write_inline_data_end+0x343/0xa90 [ 28.686404][ T289] ? __cfi_ext4_write_inline_data_end+0x10/0x10 [ 28.692749][ T289] ? __cfi_copy_page_from_iter_atomic+0x10/0x10 [ 28.699170][ T289] ext4_da_write_end+0x1ce/0x8c0 [ 28.704147][ T289] generic_perform_write+0x3a2/0x6d0 [ 28.709610][ T289] ? __cfi_generic_perform_write+0x10/0x10 [ 28.715777][ T289] ext4_buffered_write_iter+0x36f/0x660 [ 28.721501][ T289] ext4_file_write_iter+0x18f/0x13d0 [ 28.727147][ T289] ? __cfi___switch_to+0x10/0x10 [ 28.733005][ T289] ? _raw_spin_unlock+0x4c/0x70 [ 28.737966][ T289] ? finish_task_switch+0x16b/0x7b0 [ 28.743306][ T289] ? __switch_to_asm+0x3a/0x60 [ 28.748621][ T289] ? avc_policy_seqno+0x1b/0x70 [ 28.753622][ T289] ? __cfi_ext4_file_write_iter+0x10/0x10 [ 28.760862][ T289] ? fsnotify_perm+0x67/0x5b0 [ 28.766488][ T289] ? security_file_permission+0x8a/0xb0 [ 28.772923][ T289] vfs_write+0x5db/0xca0 [ 28.777400][ T289] ? __cfi_vfs_write+0x10/0x10 [ 28.782368][ T289] ? _raw_spin_unlock_irq+0x4d/0x70 [ 28.787877][ T289] ? __kasan_check_read+0x11/0x20 [ 28.793105][ T289] ? __fdget+0x15b/0x220 [ 28.797461][ T289] __x64_sys_pwrite64+0x191/0x220 [ 28.802670][ T289] ? __cfi___x64_sys_pwrite64+0x10/0x10 [ 28.808410][ T289] ? fpregs_restore_userregs+0x128/0x260 [ 28.814304][ T289] x64_sys_call+0x36/0x9a0 [ 28.819291][ T289] do_syscall_64+0x4c/0xa0 [ 28.824063][ T289] ? clear_bhb_loop+0x15/0x70 [ 28.829081][ T289] ? clear_bhb_loop+0x15/0x70 [ 28.834453][ T289] entry_SYSCALL_64_after_hwframe+0x68/0xd2 [ 28.840637][ T289] RIP: 0033:0x7f9513cc56b9 [ 28.845691][ 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 [ 28.869417][ T289] RSP: 002b:00007ffedec2c288 EFLAGS: 00000246 ORIG_RAX: 0000000000000012 [ 28.880105][ T289] RAX: ffffffffffffffda RBX: 00007ffedec2c458 RCX: 00007f9513cc56b9 [ 28.888489][ T289] RDX: 0000000000000001 RSI: 0000200000000300 RDI: 0000000000000004 [ 28.897803][ T289] RBP: 00007f9513d39610 R08: 0000000000000000 R09: 00007ffedec2c458 [ 28.906220][ T289] R10: 0000010000000005 R11: 0000000000000246 R12: 0000000000000001 [ 28.914241][ T289] R13: 00007ffedec2c448 R14: 0000000000000001 R15: 0000000000000001 [ 28.922842][ T289] [ 28.926053][ T289] Modules linked in: [ 28.930373][ T289] ---[ end trace 0000000000000000 ]--- [ 28.933880][ T28] audit: type=1400 audit(1748844074.857:72): avc: denied { create } for pid=289 comm="syz-executor396" name="bus" scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 28.936183][ T289] RIP: 0010:ext4_write_inline_data+0x3ab/0x3b0 [ 28.957588][ T28] audit: type=1400 audit(1748844074.857:73): avc: denied { read write open } for pid=289 comm="syz-executor396" path="/root/file0/bus" dev="loop0" ino=18 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:unlabeled_t tclass=file permissive=1 [ 28.963953][ T289] Code: 07 fe c1 38 c1 0f 8c 2c ff ff ff 48 89 df 49 89 d7 e8 f9 a9 cd ff 4c 89 fa e9 19 ff ff ff e8 bc 51 89 ff 0f 0b e8 b5 51 89 ff <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 b8 a4 70 30 e0 55 [ 28.963974][ T289] RSP: 0018:ffffc90000de7740 EFLAGS: 00010293 [ 29.017923][ T289] RAX: ffffffff81e69f5b RBX: 0000010000000006 RCX: ffff88810e1f0000 [ 29.026634][ T289] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000010000000006 [ 29.034915][ T289] RBP: ffffc90000de7790 R08: dffffc0000000000 R09: ffffed102016904b [ 29.043107][ T289] R10: ffffed102016904b R11: 1ffff1102016904a R12: ffff888100560720 [ 29.051460][ T289] R13: ffffc90000de7820 R14: 0000010000000005 R15: 000000000000003c [ 29.059616][ T289] FS: 0000555585e60380(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 29.068891][ T289] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 29.075699][ T289] CR2: 00005562bea4d608 CR3: 0000000126e0a000 CR4: 00000000003506b0 [ 29.084256][ T289] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 29.092392][ T289] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 29.100656][ T289] Kernel panic - not syncing: Fatal exception [ 29.107410][ T289] Kernel Offset: disabled [ 29.111738][ T289] Rebooting in 86400 seconds..