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| author | Namhyung Kim <namhyung@kernel.org> | 2014-08-08 14:19:41 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-08-08 15:57:18 -0700 |
| commit | b86280aa48b67c8119ed8f6c6bebd8c0af13a269 (patch) | |
| tree | fe2edcd6b6c80200428099b90811077d6f81597e /kernel/kallsyms.c | |
| parent | ca35664031e166ed57659daace5527f16d42e40e (diff) | |
| download | linux-rt-b86280aa48b67c8119ed8f6c6bebd8c0af13a269.tar.gz | |
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.c | 2 |
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); |