./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor1654185114 <...> forked to background, child pid 4640 no interfaces have a carrier [ 28.313340][ T4641] 8021q: adding VLAN 0 to HW filter on device bond0 [ 28.323273][ T4641] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.0.230' (ECDSA) to the list of known hosts. execve("./syz-executor1654185114", ["./syz-executor1654185114"], 0x7fff0267b1f0 /* 10 vars */) = 0 brk(NULL) = 0x55555707d000 brk(0x55555707dc40) = 0x55555707dc40 arch_prctl(ARCH_SET_FS, 0x55555707d300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor1654185114", 4096) = 28 brk(0x55555709ec40) = 0x55555709ec40 brk(0x55555709f000) = 0x55555709f000 mprotect(0x7fc524adb000, 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) = 0x7fc51c622000 write(3, "\x68\x73\x71\x73\x07\x00\x00\x00\xfd\xf1\x7c\x63\x00\x00\x10\x00\x05\x00\x00\x00\x04\x00\x14\x00\xd1\x01\x01\x00\x04\x00\x00\x00\x1f\x01\x00\x00\x00\x00\x00\x00\x5c\x03\x00\x00\x00\x00\x00\x00\x08\x03\x00\x00\x00\x00\x00\x00\x4c\x03\x00\x00\x00\x00\x00\x00\x06\x01\x00\x00\x00\x00\x00\x00\x47\x02\x00\x00\x00\x00\x00\x00\xc0\x02\x00\x00\x00\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xfd\x37\x7a\x58"..., 4096) = 4096 munmap(0x7fc51c622000, 4096) = 0 openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4 ioctl(4, LOOP_SET_FD, 3) = 0 close(3) = 0 mkdir("./file0", 0777) = 0 syzkaller login: [ 47.508765][ T5061] loop0: detected capacity change from 0 to 8 [ 47.523004][ T5061] general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN [ 47.534895][ T5061] KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] [ 47.543280][ T5061] CPU: 0 PID: 5061 Comm: syz-executor165 Not tainted 6.2.0-rc2-syzkaller #0 [ 47.551933][ T5061] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 [ 47.561965][ T5061] RIP: 0010:cache_first_page+0x60/0x90 [ 47.567516][ T5061] Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 30 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 0c 48 8b 03 5b c3 e8 80 47 92 ff eb bc 48 89 df e8 [ 47.587275][ T5061] RSP: 0018:ffffc90003cbfac0 EFLAGS: 00010212 [ 47.593317][ T5061] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000 [ 47.601285][ T5061] RDX: 0000000000000002 RSI: ffffffff823d0d6d RDI: ffff88801e25da40 [ 47.609246][ T5061] RBP: ffff88807c718000 R08: 0000000000000005 R09: 0000000000000000 [ 47.617200][ T5061] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 47.625151][ T5061] R13: 0000000000000000 R14: 000000000000035c R15: 0000000000000000 [ 47.633103][ T5061] FS: 000055555707d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 47.642017][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.648588][ T5061] CR2: 00007ffc5ca52000 CR3: 0000000026419000 CR4: 0000000000350ef0 [ 47.656549][ T5061] Call Trace: [ 47.659810][ T5061] [ 47.662809][ T5061] squashfs_read_data+0x7de/0xf50 [ 47.667828][ T5061] ? squashfs_bio_read+0x470/0x470 [ 47.672947][ T5061] ? kasan_set_track+0x25/0x30 [ 47.677694][ T5061] ? __kasan_kmalloc+0xa5/0xb0 [ 47.682439][ T5061] squashfs_read_table+0x15c/0x1f0 [ 47.687638][ T5061] squashfs_read_xattr_id_table+0x20c/0x440 [ 47.693517][ T5061] squashfs_fill_super+0xf08/0x2700 [ 47.698707][ T5061] get_tree_bdev+0x444/0x760 [ 47.703285][ T5061] ? squashfs_init_fs_context+0x140/0x140 [ 47.709009][ T5061] vfs_get_tree+0x8d/0x2f0 [ 47.713426][ T5061] path_mount+0x132a/0x1e20 [ 47.717926][ T5061] ? kmem_cache_free+0xee/0x5c0 [ 47.722762][ T5061] ? finish_automount+0x960/0x960 [ 47.727783][ T5061] ? putname+0x102/0x140 [ 47.732021][ T5061] __x64_sys_mount+0x283/0x300 [ 47.736779][ T5061] ? copy_mnt_ns+0xb30/0xb30 [ 47.741349][ T5061] ? lockdep_hardirqs_on+0x7d/0x100 [ 47.746534][ T5061] ? _raw_spin_unlock_irq+0x2e/0x50 [ 47.751716][ T5061] ? ptrace_notify+0xfe/0x140 [ 47.756381][ T5061] do_syscall_64+0x39/0xb0 [ 47.760778][ T5061] entry_SYSCALL_64_after_hwframe+0x63/0xcd [ 47.766655][ T5061] RIP: 0033:0x7fc524a6fafa [ 47.771067][ T5061] Code: 83 c4 08 5b 5d c3 66 2e 0f 1f 84 00 00 00 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 [ 47.790659][ T5061] RSP: 002b:00007ffc5ca51ad8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 [ 47.799050][ T5061] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007fc524a6fafa [ 47.807002][ T5061] RDX: 0000000020000200 RSI: 0000000020000240 RDI: 00007ffc5ca51af0 [ 47.814955][ T5061] RBP: 00007ffc5ca51af0 R08: 00007ffc5ca51b30 R09: 00000000000001f1 [ 47.822906][ T5061] R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000004 [ 47.830856][ T5061] R13: 000055555707d2c0 R14: 0000000000000000 R15: 00007ffc5ca51b30 [ 47.838816][ T5061] [ 47.841812][ T5061] Modules linked in: [ 47.845824][ T5061] ---[ end trace 0000000000000000 ]--- [ 47.851294][ T5061] RIP: 0010:cache_first_page+0x60/0x90 [ 47.856821][ T5061] Code: 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 75 30 48 b8 00 00 00 00 00 fc ff df 48 8b 1b 48 89 da 48 c1 ea 03 <80> 3c 02 00 75 0c 48 8b 03 5b c3 e8 80 47 92 ff eb bc 48 89 df e8 [ 47.876600][ T5061] RSP: 0018:ffffc90003cbfac0 EFLAGS: 00010212 [ 47.882675][ T5061] RAX: dffffc0000000000 RBX: 0000000000000010 RCX: 0000000000000000 [ 47.890684][ T5061] RDX: 0000000000000002 RSI: ffffffff823d0d6d RDI: ffff88801e25da40 [ 47.898808][ T5061] RBP: ffff88807c718000 R08: 0000000000000005 R09: 0000000000000000 [ 47.906839][ T5061] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 47.914936][ T5061] R13: 0000000000000000 R14: 000000000000035c R15: 0000000000000000 [ 47.922894][ T5061] FS: 000055555707d300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 47.931847][ T5061] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 47.938445][ T5061] CR2: 00007ffc5ca52000 CR3: 0000000026419000 CR4: 0000000000350ef0 [ 47.946449][ T5061] Kernel panic - not syncing: Fatal exception [ 47.953280][ T5061] Kernel Offset: disabled [ 47.957590][ T5061] Rebooting in 86400 seconds..