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coredump: fix memleak in dump_vma_snapshot()

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commit 6fcac87e1f upstream.

dump_vma_snapshot() allocs memory for *vma_meta, when dump_vma_snapshot()
returns -EFAULT, the memory will be leaked, so we free it correctly.

Link: https://lkml.kernel.org/r/20210810020441.62806-1-qiuxi1@huawei.com
Fixes: a07279c9a8 ("binfmt_elf, binfmt_elf_fdpic: use a VMA list snapshot")
Signed-off-by: QiuXi <qiuxi1@huawei.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Jann Horn <jannh@google.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
QiuXi 2021-09-07 20:00:32 -07:00 • committed by Greg Kroah-Hartman
parent 069c288306
commit dc25d3beba
1 changed files with 3 additions and 1 deletions
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4
fs/coredump.c
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@ -1127,8 +1127,10 @@ int dump_vma_snapshot(struct coredump_params *cprm, int *vma_count,
mmap_write_unlock(mm);
if (WARN_ON(i != *vma_count))
if (WARN_ON(i != *vma_count)) {
kvfree(*vma_meta);
return -EFAULT;
}
*vma_data_size_ptr = vma_data_size;
return 0;