[ OK ] Started Serial Getty on ttyS0. [ OK ] Reached target Login Prompts. [ 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 '10.128.0.25' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 45.416608][ T6853] REISERFS (device loop0): found reiserfs format "3.5" with standard journal [ 45.425627][ T6853] REISERFS (device loop0): using ordered data mode [ 45.433365][ T6853] reiserfs: using flush barriers [ 45.439691][ T6853] REISERFS (device loop0): journal params: device loop0, size 8192, journal first block 18, max trans len 1024, max batch 900, max commit age 30, max trans age 30 [ 45.457816][ T6853] REISERFS (device loop0): checking transaction log (loop0) [ 46.362986][ T6853] REISERFS (device loop0): Using rupasov hash to sort names [ 46.370402][ T6853] REISERFS (device loop0): using 3.5.x disk format [ 46.377082][ T6853] general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN [ 46.388773][ T6853] KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] [ 46.397158][ T6853] CPU: 0 PID: 6853 Comm: syz-executor783 Not tainted 5.9.0-rc7-syzkaller #0 [ 46.405798][ T6853] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.415828][ T6853] RIP: 0010:reiserfs_security_init+0x248/0x400 [ 46.421946][ T6853] Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 c0 20 b9 ff 48 8b 1b 48 83 c3 68 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 9a 20 b9 ff 4d 85 ed b8 a2 00 00 00 [ 46.441515][ T6853] RSP: 0018:ffffc900010379e0 EFLAGS: 00010202 [ 46.447551][ T6853] RAX: 000000000000000d RBX: 0000000000000068 RCX: dffffc0000000000 [ 46.455493][ T6853] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 46.463441][ T6853] RBP: 0000000000000000 R08: ffffffff81fbc184 R09: ffffffff81fbc057 [ 46.471393][ T6853] R10: 0000000000000002 R11: ffff8880978f2040 R12: ffff8880852a5050 [ 46.479426][ T6853] R13: 0000000000000000 R14: 0000000000280202 R15: 0000000000000001 [ 46.487377][ T6853] FS: 00000000025a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.496281][ T6853] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.502830][ T6853] CR2: 00007f129df45ab4 CR3: 000000009a56a000 CR4: 00000000001506f0 [ 46.510770][ T6853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.518709][ T6853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.526645][ T6853] Call Trace: [ 46.529911][ T6853] reiserfs_mkdir+0x229/0x800 [ 46.534559][ T6853] reiserfs_xattr_init+0x346/0x750 [ 46.539637][ T6853] reiserfs_fill_super+0x2b96/0x3240 [ 46.544892][ T6853] ? vsnprintf+0x1a12/0x1aa0 [ 46.549460][ T6853] ? snprintf+0x6f/0x90 [ 46.553591][ T6853] ? set_blocksize+0x1f5/0x3c0 [ 46.558320][ T6853] mount_bdev+0x24f/0x360 [ 46.562617][ T6853] ? reiserfs_kill_sb+0x150/0x150 [ 46.567622][ T6853] legacy_get_tree+0xea/0x180 [ 46.572286][ T6853] ? remove_save_link+0x3e0/0x3e0 [ 46.577287][ T6853] vfs_get_tree+0x88/0x270 [ 46.581669][ T6853] path_mount+0x179d/0x29e0 [ 46.586141][ T6853] __se_sys_mount+0x126/0x180 [ 46.590786][ T6853] do_syscall_64+0x31/0x70 [ 46.595169][ T6853] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 46.601026][ T6853] RIP: 0033:0x446efa [ 46.604886][ T6853] Code: b8 08 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 fd ad 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 da ad fb ff c3 66 0f 1f 84 00 00 00 00 00 [ 46.624468][ T6853] RSP: 002b:00007ffdc52e3248 EFLAGS: 00000297 ORIG_RAX: 00000000000000a5 [ 46.632845][ T6853] RAX: ffffffffffffffda RBX: 00007ffdc52e32a0 RCX: 0000000000446efa [ 46.640785][ T6853] RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdc52e3260 [ 46.648723][ T6853] RBP: 00007ffdc52e3260 R08: 00007ffdc52e32a0 R09: 00007ffd00000015 [ 46.656672][ T6853] R10: 0000000000000000 R11: 0000000000000297 R12: 0000000000000003 [ 46.664626][ T6853] R13: 0000000000000004 R14: 0000000000000003 R15: 0000000000000003 [ 46.672567][ T6853] Modules linked in: [ 46.686058][ T6853] ---[ end trace 844080690f98cf2b ]--- [ 46.691519][ T6853] RIP: 0010:reiserfs_security_init+0x248/0x400 [ 46.698182][ T6853] Code: 00 fc ff df 80 3c 08 00 74 08 48 89 df e8 c0 20 b9 ff 48 8b 1b 48 83 c3 68 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 9a 20 b9 ff 4d 85 ed b8 a2 00 00 00 [ 46.718241][ T6853] RSP: 0018:ffffc900010379e0 EFLAGS: 00010202 [ 46.724300][ T6853] RAX: 000000000000000d RBX: 0000000000000068 RCX: dffffc0000000000 [ 46.732861][ T6853] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 46.741203][ T6853] RBP: 0000000000000000 R08: ffffffff81fbc184 R09: ffffffff81fbc057 [ 46.749877][ T6853] R10: 0000000000000002 R11: ffff8880978f2040 R12: ffff8880852a5050 [ 46.758215][ T6853] R13: 0000000000000000 R14: 0000000000280202 R15: 0000000000000001 [ 46.766180][ T6853] FS: 00000000025a0880(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 46.775696][ T6853] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 46.782632][ T6853] CR2: 00007fade6ddc000 CR3: 000000009a56a000 CR4: 00000000001506f0 [ 46.790976][ T6853] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 46.799278][ T6853] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 46.807226][ T6853] Kernel panic - not syncing: Fatal exception [ 46.814156][ T6853] Kernel Offset: disabled [ 46.818461][ T6853] Rebooting in 86400 seconds..