【kernel-openEuler-22.03-LTS-SP1】将openEuler-22.03-LTS-SP1内核集成到我们的OS，打开KASAN选项对内核进行syzkaller模糊测试，BUG: KASAN: slab-out-of-bounds

【严重程度】 一般
【特性】 ext4驱动
【重现类型】 有条件必然重现
【定位分析】

BUG: KASAN: slab-out-of-bounds in crc16+0x206/0x280 lib/crc16.c:58
    Read of size 1 at addr ffff888075f5c0a8 by task syz-executor.2/15586
    
    CPU: 1 PID: 15586 Comm: syz-executor.2 Not tainted 6.2.0-rc5-syzkaller-00205-gc96618275234 #0
    Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
    Call Trace:
     <TASK>
     __dump_stack lib/dump_stack.c:88 [inline]
     dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
     print_address_description+0x74/0x340 mm/kasan/report.c:306
     print_report+0x107/0x1f0 mm/kasan/report.c:417
     kasan_report+0xcd/0x100 mm/kasan/report.c:517
     crc16+0x206/0x280 lib/crc16.c:58
     ext4_group_desc_csum+0x81b/0xb20 fs/ext4/super.c:3187
     ext4_group_desc_csum_set+0x195/0x230 fs/ext4/super.c:3210
     ext4_mb_clear_bb fs/ext4/mballoc.c:6027 [inline]
     ext4_free_blocks+0x191a/0x2810 fs/ext4/mballoc.c:6173
     ext4_remove_blocks fs/ext4/extents.c:2527 [inline]
     ext4_ext_rm_leaf fs/ext4/extents.c:2710 [inline]
     ext4_ext_remove_space+0x24ef/0x46a0 fs/ext4/extents.c:2958
     ext4_ext_truncate+0x177/0x220 fs/ext4/extents.c:4416
     ext4_truncate+0xa6a/0xea0 fs/ext4/inode.c:4342
     ext4_setattr+0x10c8/0x1930 fs/ext4/inode.c:5622
     notify_change+0xe50/0x1100 fs/attr.c:482
     do_truncate+0x200/0x2f0 fs/open.c:65
     handle_truncate fs/namei.c:3216 [inline]
     do_open fs/namei.c:3561 [inline]
     path_openat+0x272b/0x2dd0 fs/namei.c:3714
     do_filp_open+0x264/0x4f0 fs/namei.c:3741
     do_sys_openat2+0x124/0x4e0 fs/open.c:1310
     do_sys_open fs/open.c:1326 [inline]
     __do_sys_creat fs/open.c:1402 [inline]
     __se_sys_creat fs/open.c:1396 [inline]
     __x64_sys_creat+0x11f/0x160 fs/open.c:1396
     do_syscall_x64 arch/x86/entry/common.c:50 [inline]
     do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
     entry_SYSCALL_64_after_hwframe+0x63/0xcd
    RIP: 0033:0x7f72f8a8c0c9
    Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
    RSP: 002b:00007f72f97e3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000055
    RAX: ffffffffffffffda RBX: 00007f72f8bac050 RCX: 00007f72f8a8c0c9
    RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000280
    RBP: 00007f72f8ae7ae9 R08: 0000000000000000 R09: 0000000000000000
    R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
    R13: 00007ffd165348bf R14: 00007f72f97e3300 R15: 0000000000022000

【解决方案】
社区有patch已经解决
ext4: avoid a potential slab-out-of-bounds in ext4_group_desc_csum
commit 4f04351888a83e595571de672e0a4a8b74f4fb31
Reference:https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.4&id=4f04351888a83e595571de672e0a4a8b74f4fb31

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