From: Jann Horn <jannh@google.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
linux-fsdevel@vger.kernel.org,
Alexander Viro <viro@zeniv.linux.org.uk>,
"Eric W . Biederman" <ebiederm@xmission.com>,
Oleg Nesterov <oleg@redhat.com>,
Russell King <linux@armlinux.org.uk>,
linux-arm-kernel@lists.infradead.org,
Mark Salter <msalter@redhat.com>,
Aurelien Jacquiot <jacquiot.aurelien@gmail.com>,
linux-c6x-dev@linux-c6x.org,
Yoshinori Sato <ysato@users.sourceforge.jp>,
Rich Felker <dalias@libc.org>,
linux-sh@vger.kernel.org
Subject: [PATCH 2/5] coredump: Fix handling of partial writes in dump_emit()
Date: Tue, 28 Apr 2020 05:27:42 +0200 [thread overview]
Message-ID: <20200428032745.133556-3-jannh@google.com> (raw)
In-Reply-To: <20200428032745.133556-1-jannh@google.com>
After a partial write, we have to update the input buffer pointer.
Fixes: 2507a4fbd48a ("make dump_emit() use vfs_write() instead of banging at ->f_op->write directly")
Cc: stable@vger.kernel.org
Signed-off-by: Jann Horn <jannh@google.com>
---
fs/coredump.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/coredump.c b/fs/coredump.c
index 408418e6aa131..047f5a11dbee7 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -833,6 +833,7 @@ int dump_emit(struct coredump_params *cprm, const void *addr, int nr)
cprm->written += n;
cprm->pos += n;
nr -= n;
+ addr += n;
}
return 1;
}
--
2.26.2.303.gf8c07b1a785-goog
next prev parent reply other threads:[~2020-04-28 3:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 3:27 [PATCH 0/5] Fix ELF / FDPIC ELF core dumping, and use mmap_sem properly in there Jann Horn
2020-04-28 3:27 ` [PATCH 1/5] binfmt_elf_fdpic: Stop using dump_emit() on user pointers on !MMU Jann Horn
2020-04-28 3:27 ` Jann Horn [this message]
2020-04-28 3:35 ` [PATCH 2/5] coredump: Fix handling of partial writes in dump_emit() Linus Torvalds
2020-04-28 5:52 ` Jann Horn
2020-04-28 16:40 ` Rob Landley
2020-04-28 16:40 ` Linus Torvalds
2020-04-28 3:27 ` [PATCH 3/5] coredump: Refactor page range dumping into common helper Jann Horn
2020-04-28 3:27 ` [PATCH 4/5] binfmt_elf, binfmt_elf_fdpic: Use a VMA list snapshot Jann Horn
2020-04-28 3:27 ` [PATCH 5/5] mm/gup: Take mmap_sem in get_dump_page() Jann Horn
2020-04-28 3:50 ` Linus Torvalds
2020-04-28 6:10 ` Jann Horn
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