The patch titled Subject: prctl: return -EFAULT on auxv fetching failure has been added to the -mm tree. Its filename is prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2.patch This patch should soon appear at http://ozlabs.org/~akpm/mmots/broken-out/prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2.patch and later at http://ozlabs.org/~akpm/mmotm/broken-out/prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** The -mm tree is included into linux-next and is updated there every 3-4 working days ------------------------------------------------------ From: Cyrill Gorcunov <gorcunov@xxxxxxxxx> Subject: prctl: return -EFAULT on auxv fetching failure Dan reported that returning bytes left if copy_from_user failed is a bad option, return traditional -EFAULT instead. Signed-off-by: Cyrill Gorcunov <gorcunov@xxxxxxxxx> Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- kernel/sys.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff -puN kernel/sys.c~prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2 kernel/sys.c --- a/kernel/sys.c~prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2 +++ a/kernel/sys.c @@ -1809,11 +1809,10 @@ static int prctl_set_mm_map(int opt, con if (prctl_map.auxv_size) { memset(user_auxv, 0, sizeof(user_auxv)); - error = copy_from_user(user_auxv, - (const void __user *)prctl_map.auxv, - prctl_map.auxv_size); - if (error) - return error; + if (copy_from_user(user_auxv, + (const void __user *)prctl_map.auxv, + prctl_map.auxv_size)) + return -EFAULT; /* Last entry must be AT_NULL as specification requires */ user_auxv[AT_VECTOR_SIZE - 2] = AT_NULL; _ Patches currently in -mm which might be from gorcunov@xxxxxxxxx are x86mm-fix-pte_special-versus-pte_numa.patch mm-remove-misleading-arch_uses_numa_prot_none.patch prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4.patch prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix.patch prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v4-fix-2.patch ipc-shm-kill-the-historical-wrong-mm-start_stack-check.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html