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| author | Ralf Baechle <ralf@linux-mips.org> | 2008-04-16 19:55:26 +0100 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2008-05-12 16:46:51 +0100 |
| commit | f4324f3eeb311d1889b8c25076f2669012323842 (patch) | |
| tree | 4db25b6221447a64673e35fee2c97d31902f3118 | |
| parent | 1928cc84a0a937ce7042d9235996ab380f36f18a (diff) | |
| download | linux-f4324f3eeb311d1889b8c25076f2669012323842.tar.gz linux-f4324f3eeb311d1889b8c25076f2669012323842.tar.bz2 linux-f4324f3eeb311d1889b8c25076f2669012323842.zip | |
[MIPS] IRIX: Handle do_brk() error return correctly.
do_brk's return value was stored in an unsigned long variable before being
tested for less than zero making the test always fail. Also do_brk's
called irix_map_prda_page wasn't forwarding do_brk() success.
Bug checking the return value of do_brk() and initial fix for it found
by Roel Kluin <12o3l@tiscali.nl>.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| -rw-r--r-- | arch/mips/kernel/irixelf.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c index 290d8e3a664d..469c7237e5ba 100644 --- a/arch/mips/kernel/irixelf.c +++ b/arch/mips/kernel/irixelf.c @@ -578,7 +578,7 @@ static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp, * process and the system, here we map the page and fill the * structure */ -static void irix_map_prda_page(void) +static int irix_map_prda_page(void) { unsigned long v; struct prda *pp; @@ -587,8 +587,8 @@ static void irix_map_prda_page(void) v = do_brk(PRDA_ADDRESS, PAGE_SIZE); up_write(¤t->mm->mmap_sem); - if (v < 0) - return; + if (v != PRDA_ADDRESS) + return v; /* v must be an error code */ pp = (struct prda *) v; pp->prda_sys.t_pid = task_pid_vnr(current); @@ -596,6 +596,8 @@ static void irix_map_prda_page(void) pp->prda_sys.t_rpid = task_pid_vnr(current); /* We leave the rest set to zero */ + + return 0; } @@ -781,7 +783,8 @@ static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs) * IRIX maps a page at 0x200000 which holds some system * information. Programs depend on this. */ - irix_map_prda_page(); + if (irix_map_prda_page()) + goto out_free_dentry; padzero(elf_bss); |