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| author | Stefan Weil <sw@weilnetz.de> | 2011-11-21 21:06:22 +0100 |
|---|---|---|
| committer | Blue Swirl <blauwirbel@gmail.com> | 2011-12-10 17:02:05 +0000 |
| commit | c580dee4e170adad1ebdf901d32f0e1ed7d125b9 (patch) | |
| tree | bb44a13044af9a5d05a0e22ea93565a575ebb4a1 /bsd-user | |
| parent | 217bfb445b54db618a30f3a39170bebd9fd9dbf2 (diff) | |
| download | qemu-c580dee4e170adad1ebdf901d32f0e1ed7d125b9.zip qemu-c580dee4e170adad1ebdf901d32f0e1ed7d125b9.tar.gz qemu-c580dee4e170adad1ebdf901d32f0e1ed7d125b9.tar.bz2 | |
bsd_user: Fix potential null pointer dereference
This bug was spotted by cppcheck.
Using g_try_malloc0 (as does the linux-user code) fixes this.
v2:
Use g_free in bsdload.c, too. Thanks to Peter Maydell for this hint.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Diffstat (limited to 'bsd-user')
| -rw-r--r-- | bsd-user/bsdload.c | 2 | ||||
| -rw-r--r-- | bsd-user/elfload.c | 5 |
2 files changed, 3 insertions, 4 deletions
diff --git a/bsd-user/bsdload.c b/bsd-user/bsdload.c index 6d9bb6f..2abc713 100644 --- a/bsd-user/bsdload.c +++ b/bsd-user/bsdload.c @@ -196,7 +196,7 @@ int loader_exec(const char * filename, char ** argv, char ** envp, /* Something went wrong, return the inode and free the argument pages*/ for (i=0 ; i<MAX_ARG_PAGES ; i++) { - free(bprm.page[i]); + g_free(bprm.page[i]); } return(retval); } diff --git a/bsd-user/elfload.c b/bsd-user/elfload.c index 1ef1f97..1288884 100644 --- a/bsd-user/elfload.c +++ b/bsd-user/elfload.c @@ -641,8 +641,7 @@ static abi_ulong copy_elf_strings(int argc,char ** argv, void **page, offset = p % TARGET_PAGE_SIZE; pag = (char *)page[p/TARGET_PAGE_SIZE]; if (!pag) { - pag = (char *)malloc(TARGET_PAGE_SIZE); - memset(pag, 0, TARGET_PAGE_SIZE); + pag = g_try_malloc0(TARGET_PAGE_SIZE); page[p/TARGET_PAGE_SIZE] = pag; if (!pag) return 0; @@ -696,7 +695,7 @@ static abi_ulong setup_arg_pages(abi_ulong p, struct linux_binprm *bprm, info->rss++; /* FIXME - check return value of memcpy_to_target() for failure */ memcpy_to_target(stack_base, bprm->page[i], TARGET_PAGE_SIZE); - free(bprm->page[i]); + g_free(bprm->page[i]); } stack_base += TARGET_PAGE_SIZE; } |