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| author | Nadav Amit <namit@vmware.com> | 2023-02-08 10:17:08 +0300 |
|---|---|---|
| committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-02-08 23:03:27 +0300 |
| commit | ae052e3ae09572194d7e574906db7272041577d3 (patch) | |
| tree | adb6f9271a31518e91964af558284e9f0079fc57 /tools/perf/scripts/python/syscall-counts.py | |
| parent | 9d2c7203ffdb846399b82b0660563c89e918c751 (diff) | |
| download | linux-ae052e3ae09572194d7e574906db7272041577d3.tar.xz | |
x86/kprobes: Fix 1 byte conditional jump target
Commit 3bc753c06dd0 ("kbuild: treat char as always unsigned") broke
kprobes. Setting a probe-point on 1 byte conditional jump can cause the
kernel to crash when the (signed) relative jump offset gets treated as
unsigned.
Fix by replacing the unsigned 'immediate.bytes' (plus a cast) with the
signed 'immediate.value' when assigning to the relative jump offset.
[ dhansen: clarified changelog ]
Fixes: 3bc753c06dd0 ("kbuild: treat char as always unsigned")
Suggested-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Suggested-by: Dave Hansen <dave.hansen@intel.com>
Signed-off-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/20230208071708.4048-1-namit%40vmware.com
Diffstat (limited to 'tools/perf/scripts/python/syscall-counts.py')
0 files changed, 0 insertions, 0 deletions