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authorChen Qi <Qi.Chen@windriver.com>2014-06-04 01:37:55 -0400
committerChen Qi <Qi.Chen@windriver.com>2014-06-04 13:58:53 +0800
commitd195d6b6ea5c6262b2def2d67513a55c3e9c80ff (patch)
tree4af9f966fdd4f0dfbba79c26546226452f664ef7
parentf8125a1e9b6893a12355d55d4df584a8d97f0bff (diff)
downloadopenembedded-core-contrib-ChenQi/systemd-uclibc-alloca.tar.gz
openembedded-core-contrib-ChenQi/systemd-uclibc-alloca.tar.bz2
openembedded-core-contrib-ChenQi/systemd-uclibc-alloca.zip
systemd: update a uclibc specific patch to avoid segment fault errorChenQi/systemd-uclibc-alloca
The alloca() function allocates space in the stack frame of the caller, so using alloca(new_size - old_size) would possibly crash the stack, causing a segment fault error. This patch fixes the above problem by avoiding using this function in journal-file.c. [YOCTO #6201] Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
-rw-r--r--meta/recipes-core/systemd/systemd/systemd-pam-fix-fallocate.patch56
1 files changed, 32 insertions, 24 deletions
diff --git a/meta/recipes-core/systemd/systemd/systemd-pam-fix-fallocate.patch b/meta/recipes-core/systemd/systemd/systemd-pam-fix-fallocate.patch
index cfca0b95a6..f8e19ce172 100644
--- a/meta/recipes-core/systemd/systemd/systemd-pam-fix-fallocate.patch
+++ b/meta/recipes-core/systemd/systemd/systemd-pam-fix-fallocate.patch
@@ -1,10 +1,18 @@
Upstream-Status: Denied [no desire for uclibc support]
+
+This patch is uclibc specific, thus not suitable for upstream.
+
Signed-off-by: Khem Raj <raj.khem@gmail.com>
+Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
+---
+ src/journal/journal-file.c | 16 +++++++++++++++-
+ src/journal/journald-kmsg.c | 16 ++++++++++++++--
+ 2 files changed, 29 insertions(+), 3 deletions(-)
-Index: git/src/journal/journal-file.c
-===================================================================
---- git.orig/src/journal/journal-file.c 2014-04-22 22:53:05.000000000 -0700
-+++ git/src/journal/journal-file.c 2014-04-22 22:53:51.130236707 -0700
+diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
+index f2f1f35..092f87b 100644
+--- a/src/journal/journal-file.c
++++ b/src/journal/journal-file.c
@@ -38,6 +38,8 @@
#include "compress.h"
#include "fsprg.h"
@@ -14,7 +22,7 @@ Index: git/src/journal/journal-file.c
#define DEFAULT_DATA_HASH_TABLE_SIZE (2047ULL*sizeof(HashItem))
#define DEFAULT_FIELD_HASH_TABLE_SIZE (333ULL*sizeof(HashItem))
-@@ -314,7 +316,7 @@
+@@ -314,7 +316,7 @@ static int journal_file_verify_header(JournalFile *f) {
static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size) {
uint64_t old_size, new_size;
@@ -23,7 +31,7 @@ Index: git/src/journal/journal-file.c
assert(f);
-@@ -362,9 +364,24 @@
+@@ -362,9 +364,21 @@ static int journal_file_allocate(JournalFile *f, uint64_t offset, uint64_t size)
/* Note that the glibc fallocate() fallback is very
inefficient, hence we try to minimize the allocation area
as we can. */
@@ -32,27 +40,24 @@ Index: git/src/journal/journal-file.c
if (r != 0)
return -r;
+#else
-+ /* Use good old method to write zeros into the journal file
-+ perhaps very inefficient yet working. */
-+ if(new_size > old_size) {
-+ char *buf = alloca(new_size - old_size);
-+ off_t oldpos = lseek(f->fd, 0, SEEK_CUR);
-+ bzero(buf, new_size - old_size);
-+ lseek(f->fd, old_size, SEEK_SET);
-+ r = write(f->fd, buf, new_size - old_size);
-+ lseek(f->fd, oldpos, SEEK_SET);
-+ }
-+ if (r < 0)
-+ return -errno;
++ /* Write something every 512 bytes to make sure the block is allocated */
++ uint64_t len = new_size - old_size;
++ uint64_t offset = old_size;
++ for (offset += (len-1) % 512; len > 0; offset += 512) {
++ len -= 512;
++ if (pwrite(f->fd, "", 1, offset) != 1)
++ return -errno;
++ }
++
+#endif /* HAVE_POSIX_FALLOCATE */
if (fstat(f->fd, &f->last_stat) < 0)
return -errno;
-Index: git/src/journal/journald-kmsg.c
-===================================================================
---- git.orig/src/journal/journald-kmsg.c 2014-04-22 22:53:05.000000000 -0700
-+++ git/src/journal/journald-kmsg.c 2014-04-22 22:54:27.830236809 -0700
-@@ -437,6 +437,7 @@
+diff --git a/src/journal/journald-kmsg.c b/src/journal/journald-kmsg.c
+index 12992e7..dc4fa93 100644
+--- a/src/journal/journald-kmsg.c
++++ b/src/journal/journald-kmsg.c
+@@ -437,6 +437,7 @@ fail:
int server_open_kernel_seqnum(Server *s) {
_cleanup_close_ int fd;
uint64_t *p;
@@ -60,7 +65,7 @@ Index: git/src/journal/journald-kmsg.c
assert(s);
-@@ -449,8 +450,19 @@
+@@ -449,8 +450,19 @@ int server_open_kernel_seqnum(Server *s) {
log_error("Failed to open /run/systemd/journal/kernel-seqnum, ignoring: %m");
return 0;
}
@@ -82,3 +87,6 @@ Index: git/src/journal/journald-kmsg.c
log_error("Failed to allocate sequential number file, ignoring: %m");
return 0;
}
+--
+1.7.9.5
+