From: Heiko Carstens Date: Thu, 10 Oct 2024 15:52:39 +0000 (+0200) Subject: s390: Initialize psw mask in perf_arch_fetch_caller_regs() X-Git-Tag: v6.12-rc4~30^2~1 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=223e7fb979fa06934f1595b6ad0ae1d4ead1147f;p=thirdparty%2Fkernel%2Flinux.git s390: Initialize psw mask in perf_arch_fetch_caller_regs() Also initialize regs->psw.mask in perf_arch_fetch_caller_regs(). This way user_mode(regs) will return false, like it should. It looks like all current users initialize regs to zero, so that this doesn't fix a bug currently. However it is better to not rely on callers to do this. Fixes: 914d52e46490 ("s390: implement perf_arch_fetch_caller_regs") Signed-off-by: Heiko Carstens --- diff --git a/arch/s390/include/asm/perf_event.h b/arch/s390/include/asm/perf_event.h index 66200d4a21341..29ee289108c56 100644 --- a/arch/s390/include/asm/perf_event.h +++ b/arch/s390/include/asm/perf_event.h @@ -49,6 +49,7 @@ struct perf_sf_sde_regs { }; #define perf_arch_fetch_caller_regs(regs, __ip) do { \ + (regs)->psw.mask = 0; \ (regs)->psw.addr = (__ip); \ (regs)->gprs[15] = (unsigned long)__builtin_frame_address(0) - \ offsetof(struct stack_frame, back_chain); \