Package: release.debian.org User: release.debian....@packages.debian.org Usertags: pu Tags: jessie Severity: normal X-Debbugs-CC: debian...@lists.debian.org, debian-boot@lists.debian.org, k...@debian.org
Dear release team, I hereby ask for permission to update the syslinux package in jessie as well. The update fixes a bug in the isolinux isohybrid MBR causing boot failures with some old BIOS [1]. The bug is already fixed in unstable/testing and the update for stretch, which also includes this fix, has just been approved [2]. I tested the build in an sbuild jessie chroot and the updated package builds the correct isohdpfx.bin file (identical to the one currently in unstable/testing). The debdiff is attached. Thank you Lukas [1] https://bugs.debian.org/879004 [2] https://bugs.debian.org/879773
diff -Nru syslinux-6.03+dfsg/debian/changelog syslinux-6.03+dfsg/debian/changelog --- syslinux-6.03+dfsg/debian/changelog 2015-08-18 17:23:09.000000000 +0200 +++ syslinux-6.03+dfsg/debian/changelog 2017-10-29 19:12:43.000000000 +0100 @@ -1,3 +1,11 @@ +syslinux (3:6.03+dfsg-5+deb8u2) jessie; urgency=medium + + * Add patch from upstream to fix boot problem for old BIOS firmware from + around 2005 by correcting the C/H/S order (thanks Thomas Schmitt, + Closes: #879004). + + -- Lukas Schwaighofer <lu...@schwaighofer.name> Sun, 29 Oct 2017 19:12:43 +0100 + syslinux (3:6.03+dfsg-5+deb8u1) jessie; urgency=low * Cherry-pick upstream patches that fix booting on some Chromebooks diff -Nru syslinux-6.03+dfsg/debian/patches/0017-isohdpfx.S-correct-heads-sectors.patch syslinux-6.03+dfsg/debian/patches/0017-isohdpfx.S-correct-heads-sectors.patch --- syslinux-6.03+dfsg/debian/patches/0017-isohdpfx.S-correct-heads-sectors.patch 1970-01-01 01:00:00.000000000 +0100 +++ syslinux-6.03+dfsg/debian/patches/0017-isohdpfx.S-correct-heads-sectors.patch 2017-10-29 19:12:43.000000000 +0100 @@ -0,0 +1,50 @@ +From: Martin Str|mberg <a...@ludd.ltu.se> +Date: Sun, 26 Mar 2017 07:32:11 -0400 +Subject: mbr/isohdpfx.S: correct stack for heads/sectors + +Heads and sectors were pushed in reverse order per isolinux.asm +(bb519a95 reversed the order of heads/sectors on the stack). + +If anything goes wrong, clear CX in case it contains garbage. + +Signed-off-by: Gene Cumm <gene.c...@gmail.com> + +Bug-Debian: https://bugs.debian.org/879004 +Origin: upstream, quashed two commits together: + http://git.zytor.com/syslinux/syslinux.git/commit/?id=32c09027423f61c305e2423e52f5f69ecad8e2c0 + http://git.zytor.com/syslinux/syslinux.git/commit/?id=8739e2ff9ba3f92652c8df846924fd00e1ce2753 +--- + mbr/isohdpfx.S | 10 ++++++---- + 1 file changed, 6 insertions(+), 4 deletions(-) + +diff --git a/mbr/isohdpfx.S b/mbr/isohdpfx.S +index 17e1efe..4b107e4 100644 +--- a/mbr/isohdpfx.S ++++ b/mbr/isohdpfx.S +@@ -167,20 +167,22 @@ next: + read_sector_cbios: movb $0x42, %ah ; jmp read_common */ + movl $0xeb42b4+((read_common-read_sector_cbios-4) << 24), \ + (read_sector_cbios) +- jmp 1f ++ jmp 2f + 1: ++ xor %cx, %cx /* Clear EBIOS flag. */ ++2: + popw %dx + pushw %cx /* EBIOS flag */ + + /* Get (C)HS geometry */ + movb $0x08, %ah + int $0x13 +- andw $0x3f, %cx /* Sector count */ + popw %bx /* EBIOS flag */ +- pushw %cx /* -16: Save sectors on the stack */ + movzbw %dh, %ax /* dh = max head */ + incw %ax /* From 0-based max to count */ +- pushw %ax /* -18: Save heads on the stack */ ++ pushw %ax /* -16: Save heads on the stack */ ++ andw $0x3f, %cx /* Sector count */ ++ pushw %cx /* -18: Save sectors on the stack */ + mulw %cx /* Heads*sectors -> sectors per cylinder */ + + pushw %bx /* -20: EBIOS flag */ diff -Nru syslinux-6.03+dfsg/debian/patches/series syslinux-6.03+dfsg/debian/patches/series --- syslinux-6.03+dfsg/debian/patches/series 2015-08-18 17:13:25.000000000 +0200 +++ syslinux-6.03+dfsg/debian/patches/series 2017-10-29 19:12:43.000000000 +0100 @@ -4,3 +4,4 @@ 0004-gnu-efi-git.patch 0005-load-linux-correct-type.patch 0006-load-linux-protected-mode.patch +0017-isohdpfx.S-correct-heads-sectors.patch
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