./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3569026045 <...> [ 3.545742][ T24] audit: type=1400 audit(1683411698.490:9): avc: denied { append open } for pid=75 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=2 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 3.549103][ T24] audit: type=1400 audit(1683411698.490:10): avc: denied { getattr } for pid=75 comm="syslogd" path="/tmp/messages" dev="tmpfs" ino=2 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:tmpfs_t tclass=file permissive=1 [ 3.767156][ T92] udevd[92]: starting version 3.2.11 [ 3.809077][ T93] udevd[93]: starting eudev-3.2.11 [ 17.031332][ T24] kauditd_printk_skb: 50 callbacks suppressed [ 17.031341][ T24] audit: type=1400 audit(1683411712.000:61): avc: denied { transition } for pid=250 comm="sshd" path="/bin/sh" dev="sda1" ino=89 scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 17.039154][ T24] audit: type=1400 audit(1683411712.000:62): avc: denied { noatsecure } for pid=250 comm="sshd" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 17.045262][ T24] audit: type=1400 audit(1683411712.000:63): avc: denied { write } for pid=250 comm="sh" path="pipe:[395]" dev="pipefs" ino=395 scontext=root:sysadm_r:sysadm_t tcontext=system_u:system_r:sshd_t tclass=fifo_file permissive=1 [ 17.053760][ T24] audit: type=1400 audit(1683411712.000:64): avc: denied { rlimitinh } for pid=250 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 17.072374][ T24] audit: type=1400 audit(1683411712.000:65): avc: denied { siginh } for pid=250 comm="sh" scontext=system_u:system_r:sshd_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. execve("./syz-executor3569026045", ["./syz-executor3569026045"], 0x7ffdf7586680 /* 10 vars */) = 0 brk(NULL) = 0x55555614b000 brk(0x55555614bc40) = 0x55555614bc40 arch_prctl(ARCH_SET_FS, 0x55555614b300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3569026045", 4096) = 28 brk(0x55555616cc40) = 0x55555616cc40 brk(0x55555616d000) = 0x55555616d000 mprotect(0x7ff917cc9000, 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) = 0x7ff90f810000 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(0x7ff90f810000, 262144) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file1", 0777) = 0 [ 26.903831][ T24] audit: type=1400 audit(1683411721.870:66): avc: denied { execmem } for pid=292 comm="syz-executor356" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 26.916076][ T292] EXT4-fs (loop0): Warning: mounting with an experimental mount option 'dioread_nolock' for blocksize < PAGE_SIZE [ 26.927743][ T24] audit: type=1400 audit(1683411721.870:67): avc: denied { read write } for pid=292 comm="syz-executor356" 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 [ 26.940926][ T292] EXT4-fs (loop0): 1 truncate cleaned up [ 26.960308][ T24] audit: type=1400 audit(1683411721.870:68): avc: denied { open } for pid=292 comm="syz-executor356" 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 mount("/dev/loop0", "./file1", "ext4", 0, "inode_readahead_blks=0x0000000000000000,errors=continue,debug_want_extra_isize=0x0000000000000040,di"...) = 0 openat(AT_FDCWD, "./file1", O_RDONLY|O_DIRECTORY) = 3 ioctl(4, LOOP_CLR_FD) = 0 close(4) = 0 setxattr("./file1", "trusted.overlay.opaque", NULL, 0, 0) = 0 setxattr("./file1", "trusted.overlay.upper", "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 4117, 0) = 0 [ 26.965242][ T292] EXT4-fs (loop0): mounted filesystem without journal. Opts: inode_readahead_blks=0x0000000000000000,errors=continue,debug_want_extra_isize=0x0000000000000040,dioread_nolock,max_batch_time=0x0000000000000008,nombcache,,errors=continue [ 26.989421][ T24] audit: type=1400 audit(1683411721.870:69): avc: denied { ioctl } for pid=292 comm="syz-executor356" path="/dev/loop0" dev="devtmpfs" ino=111 ioctlcmd=0x4c00 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fixed_disk_device_t tclass=blk_file permissive=1 [ 27.018591][ T292] ------------[ cut here ]------------ [ 27.044483][ T292] kernel BUG at mm/slub.c:4184! [ 27.046625][ T24] audit: type=1400 audit(1683411721.870:70): avc: denied { mounton } for pid=292 comm="syz-executor356" path="/root/file1" dev="sda1" ino=1927 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 27.049209][ T292] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 27.049222][ T292] CPU: 0 PID: 292 Comm: syz-executor356 Not tainted 5.10.177-syzkaller #0 [ 27.049229][ T292] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 [ 27.049257][ T292] RIP: 0010:kfree+0x269/0x270 [ 27.049277][ T292] Code: 08 4c 89 ee 48 89 da e8 55 63 f2 ff 65 ff 0d ea 7a 5b 7e 0f 85 d2 fd ff ff e8 2f 8c 59 ff e9 c8 fd ff ff e8 a9 c1 02 03 0f 0b <0f> 0b 0f 1f 44 00 00 55 48 89 e5 53 48 83 ec 18 89 f2 65 48 8b 04 [ 27.072602][ T24] audit: type=1400 audit(1683411721.980:71): avc: denied { mount } for pid=292 comm="syz-executor356" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:fs_t tclass=filesystem permissive=1 [ 27.077803][ T292] RSP: 0018:ffffc9000095f780 EFLAGS: 00010246 [ 27.089687][ T24] audit: type=1400 audit(1683411721.980:72): avc: denied { setattr } for pid=292 comm="syz-executor356" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 27.096112][ T292] [ 27.096123][ T292] RAX: ffffea0004647f48 RBX: ffff88811da165a4 RCX: ffffea0004768580 [ 27.096130][ T292] RDX: 0000000000000000 RSI: 0000000000000012 RDI: ffff88811da165a4 [ 27.096138][ T292] RBP: ffffc9000095f7d8 R08: ffffffff81ed6729 R09: 0000000000000003 [ 27.096146][ T292] R10: fffff5200012be70 R11: dffffc0000000001 R12: 0000000000000000 [ 27.096154][ T292] R13: ffffffff81979c15 R14: 0000000000000000 R15: ffffea0004768580 [ 27.096164][ T292] FS: 000055555614b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 27.096172][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.096189][ T292] CR2: 0000000020002000 CR3: 000000011b047000 CR4: 00000000003506b0 [ 27.118857][ T24] audit: type=1400 audit(1683411721.980:73): avc: denied { write } for pid=292 comm="syz-executor356" name="/" dev="loop0" ino=2 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 27.120419][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.120427][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.120431][ T292] Call Trace: [ 27.120449][ T292] ? kfree+0xc3/0x270 [ 27.120461][ T292] kvfree+0x35/0x40 [ 27.120474][ T292] ext4_expand_extra_isize_ea+0x1124/0x1e60 [ 27.120490][ T292] ? ext4_xattr_set+0x3d0/0x3d0 [ 27.120503][ T292] ? dquot_initialize_needed+0x13d/0x370 [ 27.120515][ T292] __ext4_expand_extra_isize+0x303/0x3f0 [ 27.120536][ T292] __ext4_mark_inode_dirty+0x4a7/0x7b0 [ 27.168873][ T24] audit: type=1400 audit(1683411721.980:74): avc: denied { remove_name } for pid=292 comm="syz-executor356" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=dir permissive=1 [ 27.171220][ T292] ? sb_end_intwrite+0x110/0x110 [ 27.173476][ T24] audit: type=1400 audit(1683411721.980:75): avc: denied { unlink } for pid=292 comm="syz-executor356" name="file1" dev="loop0" ino=15 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 27.181281][ T292] ? current_time+0x1af/0x2f0 [ 27.181294][ T292] ? atime_needs_update+0x5a0/0x5a0 [ 27.181305][ T292] ? __ext4_unlink+0x6f0/0xac0 [ 27.181316][ T292] ? memcpy+0x56/0x70 [ 27.181326][ T292] __ext4_unlink+0x8b5/0xac0 [ 27.181339][ T292] ? ext4_orphan_del+0x7c0/0x7c0 [ 27.181350][ T292] ? down_write+0xd7/0x150 [ 27.181361][ T292] ? down_read_killable+0x220/0x220 [ 27.181372][ T292] ? may_delete+0x533/0x760 [ 27.181392][ T292] ext4_unlink+0x142/0x3f0 [ 27.408892][ T292] vfs_unlink+0x23b/0x510 [ 27.413621][ T292] do_unlinkat+0x430/0x8b0 [ 27.417866][ T292] ? fsnotify_link_count+0x90/0x90 [ 27.423497][ T292] ? __check_object_size+0x2e6/0x3c0 [ 27.429851][ T292] ? strncpy_from_user+0x18e/0x2d0 [ 27.435060][ T292] ? getname_flags+0x1fd/0x520 [ 27.439650][ T292] __x64_sys_unlinkat+0xcd/0xf0 [ 27.444328][ T292] do_syscall_64+0x34/0x70 [ 27.448595][ T292] entry_SYSCALL_64_after_hwframe+0x61/0xc6 [ 27.454302][ T292] RIP: 0033:0x7ff917c5cc19 [ 27.458560][ T292] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 [ 27.478430][ T292] RSP: 002b:00007ffd31787278 EFLAGS: 00000246 ORIG_RAX: 0000000000000107 [ 27.488157][ T292] RAX: ffffffffffffffda RBX: 0031656c69662f2e RCX: 00007ff917c5cc19 [ 27.495960][ T292] RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 [ 27.503768][ T292] RBP: 00007ff917c1c250 R08: 0000000000000000 R09: 0000000000000000 [ 27.511785][ T292] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff917c1c2e0 [ 27.519595][ T292] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 27.527400][ T292] Modules linked in: [ 27.531605][ T292] ---[ end trace 124e3bede6c226d4 ]--- [ 27.536891][ T292] RIP: 0010:kfree+0x269/0x270 [ 27.541596][ T292] Code: 08 4c 89 ee 48 89 da e8 55 63 f2 ff 65 ff 0d ea 7a 5b 7e 0f 85 d2 fd ff ff e8 2f 8c 59 ff e9 c8 fd ff ff e8 a9 c1 02 03 0f 0b <0f> 0b 0f 1f 44 00 00 55 48 89 e5 53 48 83 ec 18 89 f2 65 48 8b 04 [ 27.561335][ T292] RSP: 0018:ffffc9000095f780 EFLAGS: 00010246 [ 27.567136][ T292] RAX: ffffea0004647f48 RBX: ffff88811da165a4 RCX: ffffea0004768580 [ 27.575021][ T292] RDX: 0000000000000000 RSI: 0000000000000012 RDI: ffff88811da165a4 [ 27.582817][ T292] RBP: ffffc9000095f7d8 R08: ffffffff81ed6729 R09: 0000000000000003 [ 27.590628][ T292] R10: fffff5200012be70 R11: dffffc0000000001 R12: 0000000000000000 [ 27.598388][ T292] R13: ffffffff81979c15 R14: 0000000000000000 R15: ffffea0004768580 [ 27.606400][ T292] FS: 000055555614b300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000 [ 27.615722][ T292] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.622287][ T292] CR2: 0000000020002000 CR3: 000000011b047000 CR4: 00000000003506b0 [ 27.630285][ T292] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 27.638716][ T292] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 27.646575][ T292] Kernel panic - not syncing: Fatal exception [ 27.653040][ T292] Kernel Offset: disabled [ 27.657277][ T292] Rebooting in 86400 seconds..