[Bug 260006] Compressed user core files with large segments are truncated
Date: Mon, 29 Nov 2021 14:22:04 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=260006
--- Comment #3 from commit-hook@FreeBSD.org ---
A commit in branch stable/13 references this bug:
URL:
https://cgit.FreeBSD.org/src/commit/?id=2949655427209b7d086eb35a92ea1e175d1b1a67
commit 2949655427209b7d086eb35a92ea1e175d1b1a67
Author: Justin Hibbits <jhibbits@FreeBSD.org>
AuthorDate: 2021-10-01 18:39:18 +0000
Commit: Mark Johnston <markj@FreeBSD.org>
CommitDate: 2021-11-29 14:08:11 +0000
Fix segment size in compressing core dumps
A core segment is bounded in size only by memory size. On 64-bit
architectures this means a segment can be much larger than 4GB.
However, compress_chunk() takes only a u_int, clamping segment size to
4GB-1, resulting in a truncated core. Everything else, including the
compressor internally, uses size_t, so use size_t at the boundary here.
This dates back to the original refactor back in 2015 (r279801 /
aa14e9b7).
PR: 260006
Sponsored by: Juniper Networks, Inc.
(cherry picked from commit 63cb9308a75b99fe057409705bc1b2ac0293f578)
sys/kern/imgact_elf.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
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