diff options
| author | Kaitao Cheng <chengkaitao@kylinos.cn> | 2026-06-18 19:06:40 +0800 |
|---|---|---|
| committer | Petr Mladek <pmladek@suse.com> | 2026-06-25 11:19:34 +0200 |
| commit | 3a341cb3a2c2879732bc9cf006caa6a087b82241 (patch) | |
| tree | cd1668738f5185fae8cfb07f93592c58d79236f7 /lib/vsprintf.c | |
| parent | 0db1496dcb6621648b007ad0e7d55b876ae0f0bb (diff) | |
lib/vsprintf: Make no_hash_pointers take effect early
The no_hash_pointers boot parameter is now handled as an alias for
hash_pointers=never. However, hash_pointers=never only records the
selected mode during early parameter parsing, and no_hash_pointers is
not updated until hash_pointers_finalize() runs later from SLUB init.
This leaves a window during very early boot where %p output is still
hashed even though the user explicitly requested unhashed pointers with
no_hash_pointers or hash_pointers=never.
Set no_hash_pointers as soon as the "never" mode is parsed. The later
hash_pointers_finalize() call still keeps the final policy decision in
one place, but explicit requests to disable pointer hashing now take
effect for early boot users too.
Signed-off-by: Kaitao Cheng <chengkaitao@kylinos.cn>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://patch.msgid.link/20260618110640.82749-1-kaitao.cheng@linux.dev
Signed-off-by: Petr Mladek <pmladek@suse.com>
Diffstat (limited to 'lib/vsprintf.c')
| -rw-r--r-- | lib/vsprintf.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/vsprintf.c b/lib/vsprintf.c index 2bc6ef483576..e285e8bc4712 100644 --- a/lib/vsprintf.c +++ b/lib/vsprintf.c @@ -2360,6 +2360,9 @@ void __init hash_pointers_finalize(bool slub_debug) static int __init hash_pointers_mode_parse(char *str) { + /* Avoid stale no_hash_pointers state when hash_pointers overrides it */ + no_hash_pointers = false; + if (!str) { pr_warn("Hash pointers mode empty; falling back to auto.\n"); hash_pointers_mode = HASH_PTR_AUTO; @@ -2369,6 +2372,7 @@ static int __init hash_pointers_mode_parse(char *str) } else if (strcmp(str, "never") == 0) { pr_info("Hash pointers mode set to never.\n"); hash_pointers_mode = HASH_PTR_NEVER; + no_hash_pointers = true; } else if (strcmp(str, "always") == 0) { pr_info("Hash pointers mode set to always.\n"); hash_pointers_mode = HASH_PTR_ALWAYS; |