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modpost: Add .irqentry.text to OTHER_SECTIONS

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commit 7912405643a14b527cd4a4f33c1d4392da900888 upstream.

The compiler can fully inline the actual handler function of an interrupt
entry into the .irqentry.text entry point. If such a function contains an
access which has an exception table entry, modpost complains about a
section mismatch:

  WARNING: vmlinux.o(__ex_table+0x447c): Section mismatch in reference ...

  The relocation at __ex_table+0x447c references section ".irqentry.text"
  which is not in the list of authorized sections.

Add .irqentry.text to OTHER_SECTIONS to cure the issue.

Reported-by: Sergey Senozhatsky <senozhatsky@chromium.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org # needed for linux-5.4-y
Link: https://lore.kernel.org/all/20241128111844.GE10431@google.com/
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[ bump the size of good_tosec[] to prevent overflow - gregkh ]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thomas Gleixner 2024-12-01 12:17:30 +01:00 committed by Greg Kroah-Hartman
parent f0cbcf1f77
commit c23abcb314
1 changed files with 2 additions and 2 deletions
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4
scripts/mod/modpost.c
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@ -829,7 +829,7 @@ static void check_section(const char *modname, struct elf_info *elf,
".ltext", ".ltext.*" ".ltext", ".ltext.*"
#define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \ #define OTHER_TEXT_SECTIONS ".ref.text", ".head.text", ".spinlock.text", \
".fixup", ".entry.text", ".exception.text", \ ".fixup", ".entry.text", ".exception.text", \
".coldtext", ".softirqentry.text" ".coldtext", ".softirqentry.text", ".irqentry.text"
#define INIT_SECTIONS ".init.*" #define INIT_SECTIONS ".init.*"
#define MEM_INIT_SECTIONS ".meminit.*" #define MEM_INIT_SECTIONS ".meminit.*"
@ -889,7 +889,7 @@ enum mismatch {
struct sectioncheck { struct sectioncheck {
const char *fromsec[20]; const char *fromsec[20];
const char *bad_tosec[20]; const char *bad_tosec[20];
const char *good_tosec[20]; const char *good_tosec[21];
enum mismatch mismatch; enum mismatch mismatch;
void (*handler)(const char *modname, struct elf_info *elf, void (*handler)(const char *modname, struct elf_info *elf,
const struct sectioncheck* const mismatch, const struct sectioncheck* const mismatch,