CVE-2024-42300

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> erofs: fix race in z_erofs_get_gbuf()<br /> <br /> In z_erofs_get_gbuf(), the current task may be migrated to another<br /> CPU between `z_erofs_gbuf_id()` and `spin_lock(&amp;gbuf-&gt;lock)`.<br /> <br /> Therefore, z_erofs_put_gbuf() will trigger the following issue<br /> which was found by stress test:<br /> <br /> [772156.434168] kernel BUG at fs/erofs/zutil.c:58!<br /> ..<br /> [772156.435007]<br /> [772156.439237] CPU: 0 PID: 3078 Comm: stress Kdump: loaded Tainted: G E 6.10.0-rc7+ #2<br /> [772156.439239] Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 1.0.0 01/01/2017<br /> [772156.439241] pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)<br /> [772156.439243] pc : z_erofs_put_gbuf+0x64/0x70 [erofs]<br /> [772156.439252] lr : z_erofs_lz4_decompress+0x600/0x6a0 [erofs]<br /> ..<br /> [772156.445958] stress (3127): drop_caches: 1<br /> [772156.446120] Call trace:<br /> [772156.446121] z_erofs_put_gbuf+0x64/0x70 [erofs]<br /> [772156.446761] z_erofs_lz4_decompress+0x600/0x6a0 [erofs]<br /> [772156.446897] z_erofs_decompress_queue+0x740/0xa10 [erofs]<br /> [772156.447036] z_erofs_runqueue+0x428/0x8c0 [erofs]<br /> [772156.447160] z_erofs_readahead+0x224/0x390 [erofs]<br /> ..