[PATCH 6.4 507/800] scripts/mksysmap: Fix badly escaped $

Greg Kroah-Hartman
2023-07-16T20:16:33Z

From: Pierre-Clément Tosi <ptosi@google.com>

[ Upstream commit ec336aa83162fe0f3d554baed2d4e2589b69ec6e ]

The backslash characters escaping '$' in the command to sed (intended to
prevent it from interpreting '$' as "end-of-line") are currently being
consumed by the Shell (where they mean that sh should not evaluate what
follows '$' as a variable name). This means that

sed -e "/ \$/d"

executes the script

/ $/d

instead of the intended

/ \$/d

So escape twice in mksysmap any '$' that actually needs to reach sed
escaped so that the backslash survives the Shell.

Fixes: c4802044a0a7 ("scripts/mksysmap: use sed with in-line comments")
Fixes: 320e7c9d4494 ("scripts/kallsyms: move compiler-generated symbol patterns to mksysmap")
Signed-off-by: Pierre-Clément Tosi <ptosi@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
scripts/mksysmap | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/mksysmap b/scripts/mksysmap
index cb3b1fff3eee8..ec33385261022 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -32,7 +32,7 @@ ${NM} -n ${1} | sed >${2} -e "
# (do not forget a space before each pattern)

# local symbols for ARM, MIPS, etc.
-/ \$/d
+/ \\$/d

# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
/ \.L/d
@@ -41,7 +41,7 @@ ${NM} -n ${1} | sed >${2} -e "
/ __efistub_/d

# arm64 local symbols in non-VHE KVM namespace
-/ __kvm_nvhe_\$/d
+/ __kvm_nvhe_\\$/d
/ __kvm_nvhe_\.L/d

# arm64 lld
--
2.39.2