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405 lines
13 KiB
405 lines
13 KiB
From 3fcd52706b6818e785a104ed6c4f2b46e5d1ab2f Mon Sep 17 00:00:00 2001 |
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From: Karel Zak <kzak@redhat.com> |
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Date: Fri, 12 Jan 2018 11:01:26 +0100 |
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Subject: [PATCH] include/debug: don't print pointer address for SUID programs |
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* introduce new flag __UL_DEBUG_FL_NOADDR to suppress pointer address printing |
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(and MNT_DEBUG_FL_NOADDR for libmount) |
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* use __UL_DEBUG_FL_NOADDR when SUID |
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* move ul_debugobj() to debugobj.h, and require UL_DEBUG_CURRENT_MASK |
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to provide access to the current mask from ul_debugobj(). It's better |
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than modify all ul_debugobj() calls and use the global mask as |
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argument. |
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* remove never used UL_DEBUG_DEFINE_FLAG |
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* remove %p from another libmount and libblkid debug messages |
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Upstream: http://github.com/karelzak/util-linux/commit/6d00cfb2330cb47d00d350eedfbffbbf5991a743 |
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Addresses: https://bugzilla.redhat.com/show_bug.cgi?id=1534893 |
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Reported-by: halfdog <me@halfdog.net> |
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Signed-off-by: Karel Zak <kzak@redhat.com> |
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--- |
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include/Makemodule.am | 2 ++ |
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include/debug.h | 29 +++++++++++------------------ |
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include/debugobj.h | 22 ++++++++++++++++++++++ |
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lib/loopdev.c | 2 +- |
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libblkid/src/partitions/partitions.c | 20 ++++++++++---------- |
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libblkid/src/probe.c | 21 ++++++++++----------- |
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libmount/src/fs.c | 2 +- |
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libmount/src/init.c | 5 +++++ |
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libmount/src/mountP.h | 4 +++- |
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libmount/src/tab_diff.c | 6 +++--- |
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libmount/src/tab_update.c | 4 ++-- |
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libsmartcols/src/smartcolsP.h | 3 +++ |
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sys-utils/lsns.c | 3 +++ |
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13 files changed, 76 insertions(+), 47 deletions(-) |
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create mode 100644 include/debugobj.h |
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diff --git a/include/Makemodule.am b/include/Makemodule.am |
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index 168029683..bd4aa8cea 100644 |
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--- a/include/Makemodule.am |
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+++ b/include/Makemodule.am |
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@@ -11,6 +11,8 @@ dist_noinst_HEADERS += \ |
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include/colors.h \ |
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include/cpuset.h \ |
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include/crc32.h \ |
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+ include/debug.h \ |
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+ include/debugobj.h \ |
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include/env.h \ |
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include/exec_shell.h \ |
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include/exitcodes.h \ |
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diff --git a/include/debug.h b/include/debug.h |
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index 848e47456..1c7ed8037 100644 |
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--- a/include/debug.h |
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+++ b/include/debug.h |
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@@ -13,12 +13,15 @@ |
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struct dbg_mask { char *mname; int val; }; |
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#define UL_DEBUG_EMPTY_MASKNAMES {{ NULL, 0 }} |
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-#define UL_DEBUG_DEFINE_MASK(m) int m ## _debug_mask |
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+#define UL_DEBUG_MASK(m) m ## _debug_mask |
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+#define UL_DEBUG_DEFINE_MASK(m) int UL_DEBUG_MASK(m) |
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#define UL_DEBUG_DECLARE_MASK(m) extern UL_DEBUG_DEFINE_MASK(m) |
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#define UL_DEBUG_DEFINE_MASKNAMES(m) static const struct dbg_mask m ## _masknames[] |
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|
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-/* p - flag prefix, m - flag postfix */ |
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-#define UL_DEBUG_DEFINE_FLAG(p, m) p ## m |
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+/* |
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+ * Internal mask flags (above 0xffffff) |
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+ */ |
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+#define __UL_DEBUG_FL_NOADDR (1 << 24) /* Don't print object address */ |
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|
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/* l - library name, p - flag prefix, m - flag postfix, x - function */ |
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#define __UL_DBG(l, p, m, x) \ |
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@@ -55,6 +58,10 @@ struct dbg_mask { char *mname; int val; }; |
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lib ## _debug_mask = parse_envmask(lib ## _masknames, str); \ |
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} else \ |
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lib ## _debug_mask = mask; \ |
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+ if (lib ## _debug_mask) { \ |
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+ if (getuid() != geteuid() || getgid() != getegid()) \ |
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+ lib ## _debug_mask |= __UL_DEBUG_FL_NOADDR; \ |
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+ } \ |
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lib ## _debug_mask |= pref ## INIT; \ |
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if (lib ## _debug_mask != pref ## INIT) { \ |
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__UL_DBG(lib, pref, INIT, ul_debug("library debug mask: 0x%04x", \ |
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@@ -72,21 +79,7 @@ ul_debug(const char *mesg, ...) |
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va_end(ap); |
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fputc('\n', stderr); |
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} |
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- |
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-static inline void __attribute__ ((__format__ (__printf__, 2, 3))) |
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-ul_debugobj(void *handler, const char *mesg, ...) |
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-{ |
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- va_list ap; |
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- |
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- if (handler) |
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- fprintf(stderr, "[%p]: ", handler); |
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- va_start(ap, mesg); |
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- vfprintf(stderr, mesg, ap); |
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- va_end(ap); |
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- fputc('\n', stderr); |
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-} |
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- |
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-static inline int parse_envmask(const struct dbg_mask const flagnames[], |
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+static inline int parse_envmask(const struct dbg_mask flagnames[], |
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const char *mask) |
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{ |
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int res; |
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diff --git a/include/debugobj.h b/include/debugobj.h |
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new file mode 100644 |
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index 000000000..73b70b8df |
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--- /dev/null |
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+++ b/include/debugobj.h |
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@@ -0,0 +1,22 @@ |
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+#ifndef UTIL_LINUX_DEBUGOBJ_H |
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+#define UTIL_LINUX_DEBUGOBJ_H |
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+ |
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+/* |
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+ * Include *after* debug.h and after UL_DEBUG_CURRENT_MASK define. |
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+ */ |
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+ |
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+static inline void __attribute__ ((__format__ (__printf__, 2, 3))) |
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+ul_debugobj(const void *handler, const char *mesg, ...) |
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+{ |
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+ va_list ap; |
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+ |
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+ if (handler && !(UL_DEBUG_CURRENT_MASK & __UL_DEBUG_FL_NOADDR)) |
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+ fprintf(stderr, "[%p]: ", handler); |
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+ |
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+ va_start(ap, mesg); |
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+ vfprintf(stderr, mesg, ap); |
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+ va_end(ap); |
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+ fputc('\n', stderr); |
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+} |
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+ |
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+#endif /* UTIL_LINUX_DEBUGOBJ_H */ |
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diff --git a/lib/loopdev.c b/lib/loopdev.c |
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index db5463698..daf0a81e8 100644 |
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--- a/lib/loopdev.c |
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+++ b/lib/loopdev.c |
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@@ -50,7 +50,7 @@ |
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# define DBG(l,x) do { \ |
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if ((l)->debug) {\ |
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- fprintf(stderr, "loopdev: [%p]: ", (l)); \ |
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+ fprintf(stderr, "loopdev: "); \ |
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x; \ |
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} \ |
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} while(0) |
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diff --git a/libblkid/src/partitions/partitions.c b/libblkid/src/partitions/partitions.c |
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index 9d846ff85..2d0d70d81 100644 |
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--- a/libblkid/src/partitions/partitions.c |
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+++ b/libblkid/src/partitions/partitions.c |
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@@ -381,8 +381,8 @@ static blkid_partlist partitions_init_data(struct blkid_chain *chn) |
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reset_partlist(ls); |
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- DBG(LOWPROBE, blkid_debug("parts: initialized partitions list (%p, size=%d)", |
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- ls, ls->nparts_max)); |
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+ DBG(LOWPROBE, blkid_debug("parts: initialized partitions list (size=%d)", |
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+ ls->nparts_max)); |
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return ls; |
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} |
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@@ -417,7 +417,7 @@ blkid_parttable blkid_partlist_new_parttable(blkid_partlist ls, |
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list_add_tail(&tab->t_tabs, &ls->l_tabs); |
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DBG(LOWPROBE, blkid_debug("parts: create a new partition table " |
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- "(%p, type=%s, offset=%"PRId64")", tab, type, offset)); |
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+ "(type=%s, offset=%"PRId64")", type, offset)); |
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return tab; |
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} |
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@@ -458,9 +458,9 @@ blkid_partition blkid_partlist_add_partition(blkid_partlist ls, |
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par->start = start; |
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par->size = size; |
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- DBG(LOWPROBE, blkid_debug("parts: add partition (%p start=%" |
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- PRId64 ", size=%" PRId64 ", table=%p)", |
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- par, par->start, par->size, tab)); |
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+ DBG(LOWPROBE, blkid_debug("parts: add partition (start=%" |
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+ PRId64 ", size=%" PRId64 ")", |
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+ par->start, par->size)); |
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return par; |
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} |
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@@ -662,8 +662,8 @@ int blkid_partitions_do_subprobe(blkid_probe pr, blkid_partition parent, |
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blkid_loff_t sz, off; |
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DBG(LOWPROBE, blkid_debug( |
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- "parts: ----> %s subprobe requested (parent=%p)", |
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- id->name, parent)); |
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+ "parts: ----> %s subprobe requested)", |
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+ id->name)); |
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if (!pr || !parent || !parent->size) |
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return -EINVAL; |
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@@ -709,8 +709,8 @@ int blkid_partitions_do_subprobe(blkid_probe pr, blkid_partition parent, |
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blkid_free_probe(prc); /* free cloned prober */ |
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DBG(LOWPROBE, blkid_debug( |
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- "parts: <---- %s subprobe done (parent=%p, rc=%d)", |
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- id->name, parent, rc)); |
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+ "parts: <---- %s subprobe done (rc=%d)", |
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+ id->name, rc)); |
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return rc; |
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} |
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diff --git a/libblkid/src/probe.c b/libblkid/src/probe.c |
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index 9cf099ae4..07b08441f 100644 |
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--- a/libblkid/src/probe.c |
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+++ b/libblkid/src/probe.c |
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@@ -145,7 +145,7 @@ blkid_probe blkid_new_probe(void) |
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if (!pr) |
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return NULL; |
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- DBG(LOWPROBE, blkid_debug("allocate a new probe %p", pr)); |
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+ DBG(LOWPROBE, blkid_debug("allocate a new probe")); |
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/* initialize chains */ |
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for (i = 0; i < BLKID_NCHAINS; i++) { |
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@@ -260,7 +260,7 @@ void blkid_free_probe(blkid_probe pr) |
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blkid_probe_reset_buffer(pr); |
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blkid_free_probe(pr->disk_probe); |
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- DBG(LOWPROBE, blkid_debug("free probe %p", pr)); |
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+ DBG(LOWPROBE, blkid_debug("free probe")); |
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free(pr); |
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} |
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@@ -552,8 +552,8 @@ unsigned char *blkid_probe_get_buffer(blkid_probe pr, |
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list_entry(p, struct blkid_bufinfo, bufs); |
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if (x->off <= off && off + len <= x->off + x->len) { |
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- DBG(LOWPROBE, blkid_debug("\treuse buffer: off=%jd len=%jd pr=%p", |
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- x->off, x->len, pr)); |
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+ DBG(LOWPROBE, blkid_debug("\treuse buffer: off=%jd len=%jd", |
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+ x->off, x->len)); |
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bf = x; |
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break; |
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} |
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@@ -584,8 +584,8 @@ unsigned char *blkid_probe_get_buffer(blkid_probe pr, |
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bf->off = off; |
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INIT_LIST_HEAD(&bf->bufs); |
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- DBG(LOWPROBE, blkid_debug("\tbuffer read: off=%jd len=%jd pr=%p", |
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- off, len, pr)); |
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+ DBG(LOWPROBE, blkid_debug("\tbuffer read: off=%jd len=%jd", |
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+ off, len)); |
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ret = read(pr->fd, bf->data, len); |
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if (ret != (ssize_t) len) { |
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@@ -609,7 +609,7 @@ static void blkid_probe_reset_buffer(blkid_probe pr) |
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if (!pr || list_empty(&pr->buffers)) |
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return; |
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- DBG(LOWPROBE, blkid_debug("reseting probing buffers pr=%p", pr)); |
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+ DBG(LOWPROBE, blkid_debug("reseting probing buffers")); |
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while (!list_empty(&pr->buffers)) { |
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struct blkid_bufinfo *bf = list_entry(pr->buffers.next, |
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@@ -766,9 +766,8 @@ int blkid_probe_set_dimension(blkid_probe pr, |
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return -1; |
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DBG(LOWPROBE, blkid_debug( |
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- "changing probing area pr=%p: size=%llu, off=%llu " |
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+ "changing probing area: size=%llu, off=%llu " |
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"-to-> size=%llu, off=%llu", |
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- pr, |
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(unsigned long long) pr->size, |
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(unsigned long long) pr->off, |
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(unsigned long long) size, |
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@@ -840,7 +839,7 @@ int blkid_probe_get_idmag(blkid_probe pr, const struct blkid_idinfo *id, |
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static inline void blkid_probe_start(blkid_probe pr) |
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{ |
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if (pr) { |
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- DBG(LOWPROBE, blkid_debug("%p: start probe", pr)); |
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+ DBG(LOWPROBE, blkid_debug("start probe")); |
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pr->cur_chain = NULL; |
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pr->prob_flags = 0; |
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blkid_probe_set_wiper(pr, 0, 0); |
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@@ -850,7 +849,7 @@ static inline void blkid_probe_start(blkid_probe pr) |
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static inline void blkid_probe_end(blkid_probe pr) |
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{ |
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if (pr) { |
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- DBG(LOWPROBE, blkid_debug("%p: end probe", pr)); |
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+ DBG(LOWPROBE, blkid_debug("end probe")); |
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pr->cur_chain = NULL; |
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pr->prob_flags = 0; |
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blkid_probe_set_wiper(pr, 0, 0); |
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diff --git a/libmount/src/fs.c b/libmount/src/fs.c |
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index 75e3bbb26..e46ee0c0e 100644 |
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--- a/libmount/src/fs.c |
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+++ b/libmount/src/fs.c |
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@@ -1451,7 +1451,7 @@ int mnt_fs_print_debug(struct libmnt_fs *fs, FILE *file) |
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{ |
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if (!fs || !file) |
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return -EINVAL; |
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- fprintf(file, "------ fs: %p\n", fs); |
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+ fprintf(file, "------ fs\n"); |
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fprintf(file, "source: %s\n", mnt_fs_get_source(fs)); |
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fprintf(file, "target: %s\n", mnt_fs_get_target(fs)); |
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fprintf(file, "fstype: %s\n", mnt_fs_get_fstype(fs)); |
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diff --git a/libmount/src/init.c b/libmount/src/init.c |
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index 4e5f489c4..e5e6925f5 100644 |
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--- a/libmount/src/init.c |
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+++ b/libmount/src/init.c |
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@@ -38,6 +38,11 @@ void mnt_init_debug(int mask) |
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} else |
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libmount_debug_mask = mask; |
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+ if (libmount_debug_mask) { |
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+ if (getuid() != geteuid() || getgid() != getegid()) |
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+ libmount_debug_mask |= MNT_DEBUG_FL_NOADDR; |
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+ } |
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+ |
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libmount_debug_mask |= MNT_DEBUG_INIT; |
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if (libmount_debug_mask && libmount_debug_mask != MNT_DEBUG_INIT) { |
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diff --git a/libmount/src/mountP.h b/libmount/src/mountP.h |
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index 8b3f92e17..dc3ed3f49 100644 |
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--- a/libmount/src/mountP.h |
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+++ b/libmount/src/mountP.h |
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@@ -51,6 +51,8 @@ |
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#define MNT_DEBUG_DIFF (1 << 11) |
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#define MNT_DEBUG_ALL 0xFFFF |
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+#define MNT_DEBUG_FL_NOADDR (1 << 24) |
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+ |
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#ifdef CONFIG_LIBMOUNT_DEBUG |
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# include <stdio.h> |
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# include <stdarg.h> |
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@@ -91,7 +93,7 @@ mnt_debug_h(void *handler, const char *mesg, ...) |
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{ |
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va_list ap; |
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|
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- if (handler) |
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+ if (handler && !(libmount_debug_mask & MNT_DEBUG_FL_NOADDR)) |
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fprintf(stderr, "[%p]: ", handler); |
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va_start(ap, mesg); |
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vfprintf(stderr, mesg, ap); |
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diff --git a/libmount/src/tab_diff.c b/libmount/src/tab_diff.c |
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index f01f889f8..0a69f402c 100644 |
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--- a/libmount/src/tab_diff.c |
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+++ b/libmount/src/tab_diff.c |
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@@ -229,9 +229,9 @@ int mnt_diff_tables(struct libmnt_tabdiff *df, struct libmnt_table *old_tab, |
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if (!no && !nn) /* both tables are empty */ |
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return 0; |
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- DBG(DIFF, mnt_debug_h(df, "analyze new=%p (%d entries), " |
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- "old=%p (%d entries)", |
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- new_tab, nn, old_tab, no)); |
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+ DBG(DIFF, mnt_debug_h(df, "analyze new (%d entries), " |
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+ "old (%d entries)", |
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+ nn, no)); |
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mnt_reset_iter(&itr, MNT_ITER_FORWARD); |
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diff --git a/libmount/src/tab_update.c b/libmount/src/tab_update.c |
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index 5f503cad7..b45c4a92c 100644 |
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--- a/libmount/src/tab_update.c |
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+++ b/libmount/src/tab_update.c |
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@@ -173,8 +173,8 @@ int mnt_update_set_fs(struct libmnt_update *upd, unsigned long mountflags, |
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return -EINVAL; |
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DBG(UPDATE, mnt_debug_h(upd, |
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- "resetting FS [fs=0x%p, target=%s, flags=0x%08lx]", |
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- fs, target, mountflags)); |
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+ "resetting FS [target=%s, flags=0x%08lx]", |
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+ target, mountflags)); |
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if (fs) { |
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DBG(UPDATE, mnt_debug_h(upd, "FS template:")); |
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DBG(UPDATE, mnt_fs_print_debug(fs, stderr)); |
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diff --git a/libsmartcols/src/smartcolsP.h b/libsmartcols/src/smartcolsP.h |
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index 28246c14f..cea4f3101 100644 |
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--- a/libsmartcols/src/smartcolsP.h |
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+++ b/libsmartcols/src/smartcolsP.h |
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@@ -43,6 +43,9 @@ UL_DEBUG_DECLARE_MASK(libsmartcols); |
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#define ON_DBG(m, x) __UL_DBG_CALL(libsmartcols, SCOLS_DEBUG_, m, x) |
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#define DBG_FLUSH __UL_DBG_FLUSH(libsmartcols, SCOLS_DEBUG_) |
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|
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+#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(libsmartcols) |
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+#include "debugobj.h" |
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+ |
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/* |
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* Generic iterator |
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*/ |
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diff --git a/sys-utils/lsns.c b/sys-utils/lsns.c |
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index 5ee298172..fb53a16a4 100644 |
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--- a/sys-utils/lsns.c |
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+++ b/sys-utils/lsns.c |
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@@ -55,6 +55,9 @@ UL_DEBUG_DEFINE_MASKNAMES(lsns) = UL_DEBUG_EMPTY_MASKNAMES; |
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#define DBG(m, x) __UL_DBG(lsns, LSNS_DEBUG_, m, x) |
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#define ON_DBG(m, x) __UL_DBG_CALL(lsns, LSNS_DEBUG_, m, x) |
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|
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+#define UL_DEBUG_CURRENT_MASK UL_DEBUG_MASK(lsns) |
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+#include "debugobj.h" |
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+ |
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struct idcache *uid_cache = NULL; |
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|
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/* column IDs */ |
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-- |
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2.13.6
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