CVE-2023-53214

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

f2fs: fix to avoid potential memory corruption in __update_iostat_latency()

Add iotype sanity check to avoid potential memory corruption.

This is to fix the compile error below:

fs/f2fs/iostat.c:231 __update_iostat_latency() error: buffer overflow

'io_lat->peak_lat[type]' 3 <= 3

vim +228 fs/f2fs/iostat.c

211 static inline void __update_iostat_latency(struct bio_iostat_ctx

*iostat_ctx,

212 enum iostat_lat_type type)

213 {

214 unsigned long ts_diff;

215 unsigned int page_type = iostat_ctx->type;

216 struct f2fs_sb_info *sbi = iostat_ctx->sbi;

217 struct iostat_lat_info *io_lat = sbi->iostat_io_lat;

218 unsigned long flags;

219

220 if (!sbi->iostat_enable)

221 return;

222

223 ts_diff = jiffies - iostat_ctx->submit_ts;

224 if (page_type >= META_FLUSH)

^^^^^^^^^^

225 page_type = META;

226

227 spin_lock_irqsave(&sbi->iostat_lat_lock,

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References