From: "Matthew Wilcox (Oracle)" <willy@infradead.org> stable inclusion from stable-v6.6.70 commit cd27bbe8981044b2720965756a3919c450f72978 category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IBJ835 CVE: NA Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 0f7f544af60a6082cfaa3ed4c8f4ca1a858807ee ] While powerpc doesn't use the seq_buf readpos, it did explicitly initialise it for no good reason. Link: https://lore.kernel.org/linux-trace-kernel/20231024145600.739451-1-willy@inf... Cc: Christoph Hellwig <hch@lst.de> Cc: Justin Stitt <justinstitt@google.com> Cc: Kent Overstreet <kent.overstreet@linux.dev> Cc: Petr Mladek <pmladek@suse.com> Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk> Cc: Sergey Senozhatsky <senozhatsky@chromium.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Kees Cook <keescook@chromium.org> Fixes: d0ed46b60396 ("tracing: Move readpos from seq_buf to trace_seq") Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Li Huafei <lihuafei1@huawei.com> --- arch/powerpc/kernel/setup-common.c | 1 - 1 file changed, 1 deletion(-) diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c index 03eaad5949f1..f658c649e434 100644 --- a/arch/powerpc/kernel/setup-common.c +++ b/arch/powerpc/kernel/setup-common.c @@ -601,7 +601,6 @@ struct seq_buf ppc_hw_desc __initdata = { .buffer = ppc_hw_desc_buf, .size = sizeof(ppc_hw_desc_buf), .len = 0, - .readpos = 0, }; static __init void probe_machine(void) -- 2.25.1