[ OK ] Started OpenBSD Secure Shell server. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.110' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.008024][ T8443] EXT4-fs (loop0): mounted filesystem without journal. Opts: ,errors=continue [ 47.025609][ T8443] EXT4-fs (loop0): re-mounted. Opts: [ 47.031823][ T8443] EXT4-fs (loop0): re-mounted. Opts: [ 47.041836][ T8443] EXT4-fs error (device loop0): ext4_mb_generate_buddy:805: group 0, block bitmap and bg descriptor inconsistent: 8192 vs 22 free clusters [ 47.058898][ T8443] Quota error (device loop0): write_blk: dquota write failed [ 47.067365][ T8443] Quota error (device loop0): qtree_write_dquot: Error -28 occurred while creating quota [ 47.079917][ T8443] Quota error (device loop0): write_blk: dquota write failed [ 47.087680][ T8443] Quota error (device loop0): qtree_write_dquot: Error -28 occurred while creating quota [ 47.113771][ T8443] Quota error (device loop0): free_dqentry: Quota structure has offset to other block (0) than it should (8) [ 47.125751][ T8443] Quota error (device loop0): write_blk: dquota write failed [ 47.134242][ T8443] Quota error (device loop0): write_blk: dquota write failed [ 47.142849][ T8443] EXT4-fs (loop0): re-mounted. Opts: [ 47.151550][ T8448] EXT4-fs (loop0): warning: mounting fs with errors, running e2fsck is recommended [ 47.173651][ T8448] ================================================================================ [ 47.183567][ T8448] UBSAN: array-index-out-of-bounds in fs/quota/dquot.c:2169:24 [ 47.191137][ T8448] index -1 is out of range for type 'struct inode *[3]' [ 47.198689][ T8448] CPU: 0 PID: 8448 Comm: syz-executor007 Not tainted 5.10.0-rc6-syzkaller #0 [ 47.207483][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.217705][ T8448] Call Trace: [ 47.221286][ T8448] dump_stack+0x137/0x1be [ 47.225641][ T8448] ? scnprintf+0x82/0xe0 [ 47.229914][ T8448] __ubsan_handle_out_of_bounds+0xdb/0x130 [ 47.235992][ T8448] dquot_resume+0x3f1/0x440 [ 47.240495][ T8448] ? ext4_register_li_request+0xd2/0xa10 [ 47.246120][ T8448] ext4_remount+0x2455/0x3230 [ 47.250826][ T8448] ? find_next_bit+0xc6/0x110 [ 47.255506][ T8448] reconfigure_super+0x3b4/0x7b0 [ 47.260443][ T8448] path_mount+0x1a1f/0x2a20 [ 47.265081][ T8448] __se_sys_mount+0x28c/0x320 [ 47.269971][ T8448] ? lockdep_hardirqs_on+0x8d/0x130 [ 47.275164][ T8448] do_syscall_64+0x2d/0x70 [ 47.279563][ T8448] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 47.285728][ T8448] RIP: 0033:0x44c99a [ 47.289619][ T8448] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd ab fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba ab fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 47.309835][ T8448] RSP: 002b:00007fa03c8b9ba8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 47.318257][ T8448] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000044c99a [ 47.326241][ T8448] RDX: 0000000020000540 RSI: 0000000020000580 RDI: 0000000000000000 [ 47.334322][ T8448] RBP: 00007fa03c8ba6d0 R08: 00007fa03c8b9c40 R09: 0000000000240038 [ 47.342282][ T8448] R10: 0000000000240038 R11: 0000000000000297 R12: 00000000ffffffff [ 47.350341][ T8448] R13: 0000000000000000 R14: 0000000000000000 R15: 00007fa03c8b9c40 [ 47.360532][ T8448] ================================================================================ [ 47.370329][ T8448] Kernel panic - not syncing: panic_on_warn set ... [ 47.376941][ T8448] CPU: 0 PID: 8448 Comm: syz-executor007 Not tainted 5.10.0-rc6-syzkaller #0 [ 47.385677][ T8448] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.395731][ T8448] Call Trace: [ 47.399001][ T8448] dump_stack+0x137/0x1be [ 47.403316][ T8448] ? panic+0x1f3/0x800 [ 47.407382][ T8448] panic+0x291/0x800 [ 47.411262][ T8448] ? __ubsan_handle_out_of_bounds+0x100/0x130 [ 47.417435][ T8448] __ubsan_handle_out_of_bounds+0x12b/0x130 [ 47.423423][ T8448] dquot_resume+0x3f1/0x440 [ 47.427916][ T8448] ? ext4_register_li_request+0xd2/0xa10 [ 47.433536][ T8448] ext4_remount+0x2455/0x3230 [ 47.438214][ T8448] ? find_next_bit+0xc6/0x110 [ 47.443111][ T8448] reconfigure_super+0x3b4/0x7b0 [ 47.448047][ T8448] path_mount+0x1a1f/0x2a20 [ 47.452557][ T8448] __se_sys_mount+0x28c/0x320 [ 47.457220][ T8448] ? lockdep_hardirqs_on+0x8d/0x130 [ 47.462417][ T8448] do_syscall_64+0x2d/0x70 [ 47.467041][ T8448] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 47.472923][ T8448] RIP: 0033:0x44c99a [ 47.476803][ T8448] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 dd ab fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 ba ab fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 47.496513][ T8448] RSP: 002b:00007fa03c8b9ba8 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 47.505040][ T8448] RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000044c99a [ 47.513255][ T8448] RDX: 0000000020000540 RSI: 0000000020000580 RDI: 0000000000000000 [ 47.521315][ T8448] RBP: 00007fa03c8ba6d0 R08: 00007fa03c8b9c40 R09: 0000000000240038 [ 47.529296][ T8448] R10: 0000000000240038 R11: 0000000000000297 R12: 00000000ffffffff [ 47.537253][ T8448] R13: 0000000000000000 R14: 0000000000000000 R15: 00007fa03c8b9c40 [ 47.545969][ T8448] Kernel Offset: disabled [ 47.550380][ T8448] Rebooting in 86400 seconds..