Description
In the Linux kernel, the following vulnerability has been resolved: kexec: derive purgatory entry from symbol kexec_load_purgatory() derives image->start by locating e_entry inside an SHF_EXECINSTR section. If the purgatory object contains multiple executable sections with overlapping sh_addr, the entrypoint check can match more than once and trigger a WARN. Derive the entry section from the purgatory_start symbol when present and compute image->start from its final placement. Keep the existing e_entry fallback for purgatories that do not expose the symbol. WARNING: kernel/kexec_file.c:1009 at kexec_load_purgatory+0x395/0x3c0, CPU#10: kexec/1784 Call Trace: <TASK> bzImage64_load+0x133/0xa00 __do_sys_kexec_file_load+0x2b3/0x5c0 do_syscall_64+0x81/0x610 entry_SYSCALL_64_after_hwframe+0x76/0x7e [me@linux.beauty: move helper to avoid forward declaration, per Baoquan]
Product status
f368aed4827bd4276c0e3664fb2cb815a8d7caf3 (git) before 027797595a108726f4a0a45d225f603b0ffbd22b
d38e051ec6fd8650b139d9bc4b0b8b261953b263 (git) before 1737d37ae1d2814e6cf0a1af87af3d41f0812b95
013027918a4efa807409fcb356009c117e4d181a (git) before f736032c638a33a243e9126e617788f763d648f9
8652d44f466ad5772e7d1756e9457046189b0dfc (git) before cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2
8652d44f466ad5772e7d1756e9457046189b0dfc (git) before 875355152b33436907c2a6d2ffad1431fa86c62b
8652d44f466ad5772e7d1756e9457046189b0dfc (git) before 36eb314184a0ae74dd42914b47d2b9fc43be8034
8652d44f466ad5772e7d1756e9457046189b0dfc (git) before 5226570bd252cea2e805a161cb0f75c204c3108a
8652d44f466ad5772e7d1756e9457046189b0dfc (git) before 480e1d5c64bb14441f79f2eb9421d5e26f91ea3d
4947a0eb7d642b6048559857964966016ef3aa8b (git)
b16bf76b382810257e3fb6278663a9d131b70197 (git)
cb1638618545182a01444b2b20a4ed6b9d2a8c8f (git)
6.4
Any version before 6.4
5.10.252 (semver)
5.15.202 (semver)
6.1.165 (semver)
6.6.128 (semver)
6.12.75 (semver)
6.18.16 (semver)
6.19.6 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/027797595a108726f4a0a45d225f603b0ffbd22b
git.kernel.org/...c/1737d37ae1d2814e6cf0a1af87af3d41f0812b95
git.kernel.org/...c/f736032c638a33a243e9126e617788f763d648f9
git.kernel.org/...c/cfccd3b8c51bc57a8a6fcb2fd30453afae5bc0d2
git.kernel.org/...c/875355152b33436907c2a6d2ffad1431fa86c62b
git.kernel.org/...c/36eb314184a0ae74dd42914b47d2b9fc43be8034
git.kernel.org/...c/5226570bd252cea2e805a161cb0f75c204c3108a
git.kernel.org/...c/480e1d5c64bb14441f79f2eb9421d5e26f91ea3d