tree 0ef16e9846c5104730a92516f927b60d38976850
parent 65ce15a566dd742af82059687f6f89747afd6182
author Eric Sandeen <sandeen@redhat.com> 1626191363 +0200
committer Bharath <bharath@fairphone.com> 1643261303 +0530

seq_file: disallow extremely large seq buffer allocations

commit 8cae8cd89f05f6de223d63e6d15e31c8ba9cf53b upstream.

There is no reasonable need for a buffer larger than this, and it avoids
int overflow pitfalls.

Fixes: 058504edd026 ("fs/seq_file: fallback to vmalloc allocation")
Issue: FP3SEC-160
Change-Id: I9146bf107c54eec606b5ce468e22d47674ddf14e
Suggested-by: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Qualys Security Advisory <qsa@qualys.com>
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit 82280f83d873caccddeeaf6de343762e79969f52)