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Message-ID: <20130214101159.22466.38580.stgit@localhost6.localdomain6> Date: Thu, 14 Feb 2013 19:11:59 +0900 From: HATAYAMA Daisuke <d.hatayama@...fujitsu.com> To: ebiederm@...ssion.com, vgoyal@...hat.com, cpw@....com, kumagai-atsushi@....nes.nec.co.jp, lisa.mitchell@...com Cc: kexec@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: [PATCH 03/13] vmcore: fill unused part of buffer for ELF headers with 0 Via mmap() we export the range [elfcorebuf_sz, roundup(elfcorebuf_sz, PAGE_SIZE)] to user-space. We need to fill this range with 0. Signed-off-by: HATAYAMA Daisuke <d.hatayama@...fujitsu.com> --- fs/proc/vmcore.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 5010ead..43d338a 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -328,6 +328,11 @@ static int __init merge_note_headers_elf64(char *elfptr, size_t *elfsz, *elfsz = *elfsz - i; memmove(tmp, tmp+i, ((*elfsz)-sizeof(Elf64_Ehdr)-sizeof(Elf64_Phdr))); + /* Fill unused part with zero */ + memset(elfptr + sizeof(Elf64_Ehdr) + + (ehdr_ptr->e_phnum - nr_ptnote + 1) * sizeof(Elf64_Phdr), 0, + (nr_ptnote - 1) * sizeof(Elf64_Phdr)); + /* Modify e_phnum to reflect merged headers. */ ehdr_ptr->e_phnum = ehdr_ptr->e_phnum - nr_ptnote + 1; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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