./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor437234108 <...> Warning: Permanently added '10.128.0.139' (ECDSA) to the list of known hosts. execve("./syz-executor437234108", ["./syz-executor437234108"], 0x7ffd23787da0 /* 10 vars */) = 0 brk(NULL) = 0x555556672000 brk(0x555556672c40) = 0x555556672c40 arch_prctl(ARCH_SET_FS, 0x555556672300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor437234108", 4096) = 27 brk(0x555556693c40) = 0x555556693c40 brk(0x555556694000) = 0x555556694000 mprotect(0x7f1b481f6000, 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("./file0", 000) = 0 creat("./file0/file0", 054517) = 3 mount("./file0", "./file0", "incremental-fs", 0, NULL) = 0 [ 21.184872][ T22] audit: type=1400 audit(1661186392.730:73): avc: denied { execmem } for pid=304 comm="syz-executor437" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=process permissive=1 [ 21.205632][ T22] audit: type=1400 audit(1661186392.760:74): avc: denied { mounton } for pid=304 comm="syz-executor437" path="/root/file0" dev="sda1" ino=1138 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:user_home_t tclass=dir permissive=1 [ 21.207573][ T304] ------------[ cut here ]------------ [ 21.228924][ T22] audit: type=1400 audit(1661186392.760:75): avc: denied { mount } for pid=304 comm="syz-executor437" name="/" dev="incremental-fs" ino=1138 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=filesystem permissive=1 [ 21.233698][ T304] kernel BUG at fs/attr.c:289! [ 21.257649][ T22] audit: type=1400 audit(1661186392.760:76): avc: denied { setattr } for pid=304 comm="syz-executor437" name="file0" dev="incremental-fs" ino=1139 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 [ 21.262222][ T304] invalid opcode: 0000 [#1] PREEMPT SMP KASAN [ 21.291606][ T304] CPU: 1 PID: 304 Comm: syz-executor437 Not tainted 5.4.197-syzkaller-00011-gf3c75e616e3f #0 [ 21.301720][ T304] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 [ 21.311761][ T304] RIP: 0010:notify_change+0xda2/0xdb0 [ 21.317101][ T304] Code: f5 ff e9 a3 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e3 f7 ff ff 4c 89 e7 e8 38 35 f5 ff e9 d6 f7 ff ff e8 fe cb c8 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 41 56 41 55 41 [ 21.336669][ T304] RSP: 0018:ffff8881ddc47c68 EFLAGS: 00010293 [ 21.342699][ T304] RAX: ffffffff819786f2 RBX: 0000000000001847 RCX: ffff8881de1c3f00 [ 21.350653][ T304] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.358591][ T304] RBP: 0000000000000001 R08: ffffffff81977ef5 R09: ffff8881ddc47c18 [ 21.366529][ T304] R10: ffffed103bb88f85 R11: 1ffff1103bb88f83 R12: ffff8881ddc47e00 [ 21.374466][ T304] R13: ffff8881e66c4770 R14: ffff8881e64f4100 R15: dffffc0000000000 [ 21.382407][ T304] FS: 0000555556672300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.391299][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.397849][ T304] CR2: 0000000020001ac0 CR3: 00000001de255000 CR4: 00000000003406e0 [ 21.405791][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.413738][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.421673][ T304] Call Trace: [ 21.424935][ T304] incfs_setattr+0x1fa/0x360 [ 21.429493][ T304] ? file_release+0x180/0x180 [ 21.434135][ T304] notify_change+0xb19/0xdb0 [ 21.438694][ T304] chown_common+0x311/0x560 [ 21.443165][ T304] do_fchownat+0x124/0x1e0 [ 21.447560][ T304] __x64_sys_lchown+0x81/0x90 [ 21.452204][ T304] do_syscall_64+0xcb/0x1c0 [ 21.456693][ T304] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 21.462550][ T304] RIP: 0033:0x7f1b48189ba9 [ 21.466930][ T304] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 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 [ 21.486498][ T304] RSP: 002b:00007ffe9f4c6058 EFLAGS: 00000246 ORIG_RAX: 000000000000005e [ 21.494871][ T304] RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f1b48189ba9 [ 21.502809][ T304] RDX: 000000000000ee01 RSI: 0000000000000000 RDI: 0000000020001ac0 [ 21.510746][ T304] RBP: 2f30656c69662f2e R08: 0000000000000000 R09: 0000000000000000 [ 21.518682][ T304] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1b4814dde0 [ 21.526623][ T304] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 21.534561][ T304] Modules linked in: [ 21.538495][ T304] ---[ end trace ff895e715c0d20a5 ]--- [ 21.543939][ T304] RIP: 0010:notify_change+0xda2/0xdb0 [ 21.549311][ T304] Code: f5 ff e9 a3 fb ff ff 44 89 e1 80 e1 07 80 c1 03 38 c1 0f 8c e3 f7 ff ff 4c 89 e7 e8 38 35 f5 ff e9 d6 f7 ff ff e8 fe cb c8 ff <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 55 41 57 41 56 41 55 41 [ 21.568902][ T304] RSP: 0018:ffff8881ddc47c68 EFLAGS: 00010293 [ 21.574933][ T304] RAX: ffffffff819786f2 RBX: 0000000000001847 RCX: ffff8881de1c3f00 [ 21.582911][ T304] RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 [ 21.590872][ T304] RBP: 0000000000000001 R08: ffffffff81977ef5 R09: ffff8881ddc47c18 [ 21.598834][ T304] R10: ffffed103bb88f85 R11: 1ffff1103bb88f83 R12: ffff8881ddc47e00 [ 21.606810][ T304] R13: ffff8881e66c4770 R14: ffff8881e64f4100 R15: dffffc0000000000 [ 21.614752][ T304] FS: 0000555556672300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 [ 21.623684][ T304] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 21.630256][ T304] CR2: 0000000020001ac0 CR3: 00000001de255000 CR4: 00000000003406e0 [ 21.638219][ T304] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 21.646179][ T304] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 21.654120][ T304] Kernel panic - not syncing: Fatal exception [ 21.660314][ T304] Kernel Offset: disabled [ 21.664624][ T304] Rebooting in 86400 seconds..