REISERFS (device loop5): 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 1c3f1067 P4D 1c3f1067 PUD 2dbde067 PMD 0 
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 10248 Comm: syz-executor.5 Not tainted 5.11.0-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:ffffc90001ca7910 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff92000394f25 RCX: ffffc90013718000
RDX: 0000000000000000 RSI: ffff88803800cdb8 RDI: ffff8880834637e0
RBP: ffffffff895d7300 R08: 0000000000000000 R09: ffffffff8fc28cdf
R10: ffffffff81c32ae1 R11: 0000000000000000 R12: ffff88803800cdb8
R13: ffff8880834637e0 R14: ffffc90001ca7aa0 R15: ffffc90001ca7948
FS:  00007f2d26bb1700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 000000002f806000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 __lookup_slow+0x24c/0x480 fs/namei.c:1544
 lookup_one_len+0x163/0x190 fs/namei.c:2565
 reiserfs_lookup_privroot+0x92/0x280 fs/reiserfs/xattr.c:979
 reiserfs_fill_super+0x211b/0x2e00 fs/reiserfs/super.c:2176
 mount_bdev+0x34d/0x410 fs/super.c:1366
 legacy_get_tree+0x105/0x220 fs/fs_context.c:592
 vfs_get_tree+0x89/0x2f0 fs/super.c:1496
 do_new_mount fs/namespace.c:2881 [inline]
 path_mount+0x13ad/0x20c0 fs/namespace.c:3211
 do_mount fs/namespace.c:3224 [inline]
 __do_sys_mount fs/namespace.c:3432 [inline]
 __se_sys_mount fs/namespace.c:3409 [inline]
 __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4672ba
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:00007f2d26bb0fa8 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00000000004672ba
RDX: 0000000020000040 RSI: 0000000020000100 RDI: 00007f2d26bb1000
RBP: 00007f2d26bb1040 R08: 00007f2d26bb1040 R09: 0000000020000040
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000040
R13: 0000000020000100 R14: 00007f2d26bb1000 R15: 0000000020011500
Modules linked in:
CR2: 0000000000000000
---[ end trace 0017b1d9e441ad64 ]---
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc90001ca7910 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 1ffff92000394f25 RCX: ffffc90013718000
RDX: 0000000000000000 RSI: ffff88803800cdb8 RDI: ffff8880834637e0
RBP: ffffffff895d7300 R08: 0000000000000000 R09: ffffffff8fc28cdf
R10: ffffffff81c32ae1 R11: 0000000000000000 R12: ffff88803800cdb8
R13: ffff8880834637e0 R14: ffffc90001ca7aa0 R15: ffffc90001ca7948
FS:  00007f2d26bb1700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f16f6334000 CR3: 000000002f806000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400