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| author | David S. Miller <davem@davemloft.net> | 2009-02-14 23:12:00 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-02-14 23:12:00 -0800 |
| commit | 5e30589521518bff36fd2638b3c3d69679c50436 (patch) | |
| tree | 6ac985658a06b0787e4354d0d16d380ea9b16a5a /fs/binfmt_elf.c | |
| parent | ac178ef0ae9eb44fd527d87aa9b6394e05f56e1f (diff) | |
| parent | d2f8d7ee1a9b4650b4e43325b321801264f7c37a (diff) | |
| download | kernel-crypto-5e30589521518bff36fd2638b3c3d69679c50436.tar.gz kernel-crypto-5e30589521518bff36fd2638b3c3d69679c50436.tar.xz kernel-crypto-5e30589521518bff36fd2638b3c3d69679c50436.zip | |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Conflicts:
drivers/net/wireless/iwlwifi/iwl-agn.c
drivers/net/wireless/iwlwifi/iwl3945-base.c
Diffstat (limited to 'fs/binfmt_elf.c')
| -rw-r--r-- | fs/binfmt_elf.c | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index e3ff2b9e602..33b7235f853 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1208,9 +1208,11 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, * check for an ELF header. If we find one, dump the first page to * aid in determining what was mapped here. */ - if (FILTER(ELF_HEADERS) && vma->vm_file != NULL && vma->vm_pgoff == 0) { + if (FILTER(ELF_HEADERS) && + vma->vm_pgoff == 0 && (vma->vm_flags & VM_READ)) { u32 __user *header = (u32 __user *) vma->vm_start; u32 word; + mm_segment_t fs = get_fs(); /* * Doing it this way gets the constant folded by GCC. */ @@ -1223,7 +1225,15 @@ static unsigned long vma_dump_size(struct vm_area_struct *vma, magic.elfmag[EI_MAG1] = ELFMAG1; magic.elfmag[EI_MAG2] = ELFMAG2; magic.elfmag[EI_MAG3] = ELFMAG3; - if (get_user(word, header) == 0 && word == magic.cmp) + /* + * Switch to the user "segment" for get_user(), + * then put back what elf_core_dump() had in place. + */ + set_fs(USER_DS); + if (unlikely(get_user(word, header))) + word = 0; + set_fs(fs); + if (word == magic.cmp) return PAGE_SIZE; } |