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s390/vdso: check for undefined symbols after build

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When adding an undefined symbol the build still succeeds, but
userspace is crashing trying to execute vdso because the
undefined symbol is not resolved. Add the check for undefined
symbols to prevent this.

Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This commit is contained in:
Sven Schnelle
2023-06-21 09:18:52 +02:00
committed by Alexander Gordeev
parent 51f513fd96
commit 0dd0bbc200
2 changed files with 8 additions and 2 deletions
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5
arch/s390/kernel/vdso32/Makefile
View File

@@ -40,8 +40,11 @@ KCSAN_SANITIZE := n
# Force dependency (incbin is bad)
$(obj)/vdso32_wrapper.o : $(obj)/vdso32.so
quiet_cmd_vdso_and_check = VDSO $@
cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
$(obj)/vdso32.so.dbg: $(src)/vdso32.lds $(obj-vdso32) FORCE
$(call if_changed,ld)
$(call if_changed,vdso_and_check)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S

5
arch/s390/kernel/vdso64/Makefile
View File

@@ -44,9 +44,12 @@ KCSAN_SANITIZE := n
# Force dependency (incbin is bad)
$(obj)/vdso64_wrapper.o : $(obj)/vdso64.so
quiet_cmd_vdso_and_check = VDSO $@
cmd_vdso_and_check = $(cmd_ld); $(cmd_vdso_check)
# link rule for the .so file, .lds has to be first
$(obj)/vdso64.so.dbg: $(src)/vdso64.lds $(obj-vdso64) $(obj-cvdso64) FORCE
$(call if_changed,ld)
$(call if_changed,vdso_and_check)
# strip rule for the .so file
$(obj)/%.so: OBJCOPYFLAGS := -S