Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. seq_copy_in_user() and seq_copy_in_kernel() did not have prototypes matching snd_seq_dump_func_t. Adjust this and remove the casts. There are not resulting binary output differences. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b38486e82ecb9f3046e0184205f6b61408fc40c9affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < e385360705a0b346bdb57ce938249175d0613b8aaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2f46e95bf344abc4e74f8158901d32a869e0adb6affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 63badfed200219ca656968725f1a43df293ac936affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 15c42ab8d43acb73e2eba361ad05822c0af0ecfaaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < fccd454129f6a0739651f7f58307cdb631fd6e89affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 13ee8fb5410b740c8dd2867d3557c7662f7dda2daffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 05530ef7cf7c7d700f6753f058999b1b5099a026affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected4.9.336 to ≤ 4.9.*unaffected4.14.302 to ≤ 4.14.*unaffected4.19.269 to ≤ 4.19.*unaffected5.4.227 to ≤ 5.4.*unaffected5.10.159 to ≤ 5.10.*unaffected5.15.83 to ≤ 5.15.*unaffected6.0.13 to ≤ 6.0.*unaffected6.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b38486e82ecb9f3046e0184205f6b61408fc40c9 ↗
- https://git.kernel.org/stable/c/e385360705a0b346bdb57ce938249175d0613b8a ↗
- https://git.kernel.org/stable/c/2f46e95bf344abc4e74f8158901d32a869e0adb6 ↗
- https://git.kernel.org/stable/c/63badfed200219ca656968725f1a43df293ac936 ↗
- https://git.kernel.org/stable/c/15c42ab8d43acb73e2eba361ad05822c0af0ecfa ↗
- https://git.kernel.org/stable/c/fccd454129f6a0739651f7f58307cdb631fd6e89 ↗
- https://git.kernel.org/stable/c/13ee8fb5410b740c8dd2867d3557c7662f7dda2d ↗
- https://git.kernel.org/stable/c/05530ef7cf7c7d700f6753f058999b1b5099a026 ↗