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authorNamhyung Kim <namhyung@kernel.org>2014-08-09 01:19:41 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-09 02:57:18 +0400
commitb86280aa48b67c8119ed8f6c6bebd8c0af13a269 (patch)
treefe2edcd6b6c80200428099b90811077d6f81597e /kernel/kallsyms.c
parentca35664031e166ed57659daace5527f16d42e40e (diff)
downloadlinux-b86280aa48b67c8119ed8f6c6bebd8c0af13a269.tar.xz
kernel/kallsyms.c: fix %pB when there's no symbol at the address
__sprint_symbol() should restore original address when kallsyms_lookup() failed to find a symbol. It's reported when dumpstack shows an address in a dynamically allocated trampoline for ftrace. [ 1314.612287] [<ffffffff81700312>] dump_stack+0x45/0x56 [ 1314.612290] [<ffffffff8125f5b0>] ? meminfo_proc_open+0x30/0x30 [ 1314.612293] [<ffffffffa080a494>] kpatch_ftrace_handler+0x14/0xf0 [kpatch] [ 1314.612306] [<ffffffffa00160c4>] 0xffffffffa00160c3 You can see a difference in the hex address - c4 and c3. Fix it. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Reported-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kallsyms.c')
-rw-r--r--kernel/kallsyms.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c
index cb0cf37dac3a..ae5167087845 100644
--- a/kernel/kallsyms.c
+++ b/kernel/kallsyms.c
@@ -364,7 +364,7 @@ static int __sprint_symbol(char *buffer, unsigned long address,
address += symbol_offset;
name = kallsyms_lookup(address, &size, &offset, &modname, buffer);
if (!name)
- return sprintf(buffer, "0x%lx", address);
+ return sprintf(buffer, "0x%lx", address - symbol_offset);
if (name != buffer)
strcpy(buffer, name);