{"affected":[],"cveId":"CVE-2022-50743","cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: Fix pcluster memleak when its block address is zero\n\nsyzkaller reported a memleak:\nhttps://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed\n\nunreferenced object 0xffff88811009c7f8 (size 136):\n  ...\n  backtrace:\n    [<ffffffff821db19b>] z_erofs_do_read_page+0x99b/0x1740\n    [<ffffffff821dee9e>] z_erofs_readahead+0x24e/0x580\n    [<ffffffff814bc0d6>] read_pages+0x86/0x3d0\n    ...\n\nsyzkaller constructed a case: in z_erofs_register_pcluster(),\nztailpacking = false and map->m_pa = zero. This makes pcl->obj.index be\nzero although pcl is not a inline pcluster.\n\nThen following path adds refcount for grp, but the refcount won't be put\nbecause pcl is inline.\n\nz_erofs_readahead()\n  z_erofs_do_read_page() # for another page\n    z_erofs_collector_begin()\n      erofs_find_workgroup()\n        erofs_workgroup_get()\n\nSince it's illegal for the block address of a non-inlined pcluster to\nbe zero, add check here to avoid registering the pcluster which would\nbe leaked.","epss":null,"exploits":[],"kev":null,"metrics":[],"modifiedAt":1794312600177,"publishedAt":1766582161020,"references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/618e712b99c78d1004b70a1a9ab0a4830d0b2673"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/ac54c1f7b288d83b6ba1e320efff24ecc21309cd"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"url":"https://git.kernel.org/stable/c/c42c0ffe81176940bd5dead474216b7198d77675"}],"remediation":[],"revision":"4d4d025c0a7baf3b96359ad2ef05c527c2c853a861a49a148b17cfbeb2dfe343","sources":[{"modifiedAt":1794312600177,"name":"NVD","retrievedAt":1794313076709,"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-50743"}],"ssvc":null,"status":"published","title":"CVE-2022-50743","updatedAt":1794313076709}