REISERFS (device loop2): Using tea 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 30fcb067 P4D 30fcb067 PUD 341d7067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 0 PID: 12196 Comm: syz-executor.2 Not tainted 5.13.0-rc2-next-20210518-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:ffffc90002777908 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 1ffff920004eef24 RCX: ffffc9000e4e1000 RDX: 0000000000000000 RSI: ffff8880377c0468 RDI: ffff888080a58190 RBP: ffffffff899e4880 R08: 0000000000000000 R09: ffffffff909ff3df R10: ffffffff81c99241 R11: 0000000000000000 R12: ffff8880377c0468 R13: ffff888080a58190 R14: ffffc90002777a98 R15: ffffc90002777940 FS: 00007f6e34f8f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000155f6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 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_64+0x31/0xb0 arch/x86/entry/common.c:47 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:00007f6e34f8efa8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 0000000000467afa RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f6e34f8f000 RBP: 00007f6e34f8f040 R08: 00007f6e34f8f040 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f6e34f8f000 R15: 0000000020011500 Modules linked in: CR2: 0000000000000000 ---[ end trace edf14d1d7045dbef ]--- RIP: 0010:0x0 Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6. RSP: 0018:ffffc90002777908 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: 1ffff920004eef24 RCX: ffffc9000e4e1000 RDX: 0000000000000000 RSI: ffff8880377c0468 RDI: ffff888080a58190 RBP: ffffffff899e4880 R08: 0000000000000000 R09: ffffffff909ff3df R10: ffffffff81c99241 R11: 0000000000000000 R12: ffff8880377c0468 R13: ffff888080a58190 R14: ffffc90002777a98 R15: ffffc90002777940 FS: 00007f6e34f8f700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffffffffffffd6 CR3: 00000000155f6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400