mirror of
https://github.com/torvalds/linux
synced 2026-07-26 04:01:06 +09:00
07ad45e06b
The function has a memory leak when kvrealloc() fails. The function directly assigns NULL to the markers pointer, losing the reference to the previously allocated memory. This causes kvfree() in pt_dump_init() to free NULL instead of the leaked memory. Fix by: 1. Using kvrealloc() uniformly for all allocations 2. Using a temporary variable to preserve the original pointer until allocation succeeds 3. Removing the error path that sets markers_cnt=0 to keep consistency between markers and markers_cnt Found via static analysis and this is similar to commit42378a9ca5("bpf, verifier: Fix memory leak in array reallocation for stack state") Fixes:d0e7915d2a("s390/mm/ptdump: Generate address marker array dynamically") Cc: stable@vger.kernel.org Signed-off-by: Miaoqian Lin <linmq006@gmail.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>