REISERFS (device loop4): Using rupasov hash to sort names
BUG: kernel NULL pointer dereference, address: 0000000000000000
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 35a5c067 P4D 35a5c067 PUD 22126067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 10459 Comm: syz-executor.4 Not tainted 5.13.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc90001edf908 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff920003dbf24 RCX: ffffc9001261f000
RDX: 0000000000000000 RSI: ffff888039cd1608 RDI: ffff888084778190
RBP: ffffffff899e8440 R08: 0000000000000000 R09: ffffffff90a5afa7
R10: ffffffff81c98901 R11: 0000000000000000 R12: ffff888039cd1608
R13: ffff888084778190 R14: ffffc90001edfa98 R15: ffffc90001edf940
FS:  00007f0837c61700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002cccb000 CR4: 0000000000350ee0
Call Trace:
 __lookup_slow+0x24c/0x480 fs/namei.c:1629
 lookup_one_len+0x163/0x190 fs/namei.c:2650
 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:980
 reiserfs_fill_super+0x2124/0x2e00 fs/reiserfs/super.c:2176
 mount_bdev+0x34d/0x410 fs/super.c:1368
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1498
 do_new_mount fs/namespace.c:2905 [inline]
 path_mount+0x132a/0x1fa0 fs/namespace.c:3235
 do_mount fs/namespace.c:3248 [inline]
 __do_sys_mount fs/namespace.c:3456 [inline]
 __se_sys_mount fs/namespace.c:3433 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3433
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x467afa
Code: 48 c7 c2 bc ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f0837c60fa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f0837c61000
RBP: 00007f0837c61040 R08: 00007f0837c61040 R09: 0000000020000000
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f0837c61000 R15: 0000000020011500
Modules linked in:
CR2: 0000000000000000
---[ end trace 55d08a2dc7319305 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc90001edf908 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff920003dbf24 RCX: ffffc9001261f000
RDX: 0000000000000000 RSI: ffff888039cd1608 RDI: ffff888084778190
RBP: ffffffff899e8440 R08: 0000000000000000 R09: ffffffff90a5afa7
R10: ffffffff81c98901 R11: 0000000000000000 R12: ffff888039cd1608
R13: ffff888084778190 R14: ffffc90001edfa98 R15: ffffc90001edf940
FS:  00007f0837c61700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002cccb000 CR4: 0000000000350ee0