[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Load/Save RF Kill Switch Status. [ OK ] Started Update UTMP about System Runlevel Changes. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.33' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.963243][ T7058] ------------[ cut here ]------------ [ 55.968850][ T7058] WARNING: CPU: 1 PID: 7058 at fs/overlayfs/file.c:66 ovl_real_fdget_meta+0x49c/0x530 [ 55.978378][ T7058] Kernel panic - not syncing: panic_on_warn set ... [ 55.984993][ T7058] CPU: 1 PID: 7058 Comm: syz-executor526 Not tainted 5.7.0-rc2-syzkaller #0 [ 55.993651][ T7058] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.003693][ T7058] Call Trace: [ 56.006966][ T7058] dump_stack+0x188/0x20d [ 56.011273][ T7058] ? ovl_real_fdget_meta+0x480/0x530 [ 56.016549][ T7058] panic+0x2e3/0x75c [ 56.020424][ T7058] ? add_taint.cold+0x16/0x16 [ 56.025076][ T7058] ? printk+0xba/0xed [ 56.029035][ T7058] ? kmsg_dump_rewind_nolock+0xd9/0xd9 [ 56.034480][ T7058] ? __warn.cold+0x14/0x35 [ 56.038883][ T7058] ? __warn+0xd5/0x1c8 [ 56.042928][ T7058] ? ovl_real_fdget_meta+0x49c/0x530 [ 56.048186][ T7058] __warn.cold+0x2f/0x35 [ 56.052404][ T7058] ? ovl_real_fdget_meta+0x49c/0x530 [ 56.057676][ T7058] report_bug+0x27b/0x2f0 [ 56.061986][ T7058] do_error_trap+0x12b/0x220 [ 56.066549][ T7058] ? ovl_real_fdget_meta+0x49c/0x530 [ 56.071820][ T7058] do_invalid_op+0x32/0x40 [ 56.076211][ T7058] ? ovl_real_fdget_meta+0x49c/0x530 [ 56.081471][ T7058] invalid_op+0x23/0x30 [ 56.085603][ T7058] RIP: 0010:ovl_real_fdget_meta+0x49c/0x530 [ 56.091485][ T7058] Code: ff 4c 89 ff e8 a5 dd 2d ff e9 ff fc ff ff e8 9b dd 2d ff e9 c5 fc ff ff 4c 89 f7 e8 fe dd 2d ff e9 5d fd ff ff e8 94 16 f0 fe <0f> 0b 41 bd fb ff ff ff e9 fd fc ff ff e8 82 dd 2d ff e9 84 fb ff [ 56.111066][ T7058] RSP: 0018:ffffc90000e97ba0 EFLAGS: 00010293 [ 56.117104][ T7058] RAX: ffff888095952440 RBX: 0000000000002000 RCX: ffffffff828315e9 [ 56.125052][ T7058] RDX: 0000000000000000 RSI: ffffffff8283181c RDI: 0000000000000005 [ 56.132998][ T7058] RBP: 0000000004068002 R08: ffff888095952440 R09: ffffed1012a5e281 [ 56.141077][ T7058] R10: ffff8880952f1403 R11: ffffed1012a5e280 R12: ffff888099dc4780 [ 56.149044][ T7058] R13: ffff888087ab7438 R14: 000000000002a002 R15: ffff888099dc4800 [ 56.157014][ T7058] ? ovl_real_fdget_meta+0x269/0x530 [ 56.162279][ T7058] ? ovl_real_fdget_meta+0x49c/0x530 [ 56.167558][ T7058] ovl_write_iter+0x3da/0x11a0 [ 56.172331][ T7058] ? ovl_open+0x270/0x270 [ 56.176643][ T7058] ? mark_held_locks+0xe0/0xe0 [ 56.181385][ T7058] ? locks_lock_inode_wait+0x400/0x400 [ 56.186821][ T7058] new_sync_write+0x4a2/0x700 [ 56.191487][ T7058] ? new_sync_read+0x7a0/0x7a0 [ 56.196233][ T7058] ? rcu_read_lock_any_held+0xcd/0xf0 [ 56.201580][ T7058] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 56.206851][ T7058] __vfs_write+0xc9/0x100 [ 56.211155][ T7058] vfs_write+0x268/0x5d0 [ 56.215373][ T7058] ksys_write+0x12d/0x250 [ 56.219677][ T7058] ? __ia32_sys_read+0xb0/0xb0 [ 56.224416][ T7058] ? trace_hardirqs_off_caller+0x55/0x230 [ 56.230113][ T7058] do_syscall_64+0xf6/0x7d0 [ 56.234591][ T7058] entry_SYSCALL_64_after_hwframe+0x49/0xb3 [ 56.240458][ T7058] RIP: 0033:0x440309 [ 56.244351][ T7058] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 fb 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 56.263982][ T7058] RSP: 002b:00007fffed1c4e38 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 56.272372][ T7058] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440309 [ 56.280320][ T7058] RDX: 0000000000000001 RSI: 0000000020000340 RDI: 0000000000000003 [ 56.288267][ T7058] RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8 [ 56.296225][ T7058] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b90 [ 56.304171][ T7058] R13: 0000000000401c20 R14: 0000000000000000 R15: 0000000000000000 [ 56.313493][ T7058] Kernel Offset: disabled [ 56.317890][ T7058] Rebooting in 86400 seconds..