diff options
| author | Eric Andersen <andersen@codepoet.org> | 2003-12-31 11:50:08 +0000 |
|---|---|---|
| committer | Eric Andersen <andersen@codepoet.org> | 2003-12-31 11:50:08 +0000 |
| commit | 7c3eb1f4a09caba155e3364ff32cd81a2312eb45 (patch) | |
| tree | 4b59077686d713b96f7ae519eb56b8af885f2426 /libc | |
| parent | 6373c2b14188d31a3e4a3d7eb917b0479d56f373 (diff) | |
Add extra checks for sigprocmask and rt_sigprocmask syscalls.
The rt_sigprocmask syscall has broken error handling in 2.4.x
kernels, while the sigprocmask syscall appears to get things
right. Regardless we should be extra careful, and add these
checks.
Diffstat (limited to 'libc')
| -rw-r--r-- | libc/sysdeps/linux/common/syscalls.c | 38 |
1 files changed, 34 insertions, 4 deletions
diff --git a/libc/sysdeps/linux/common/syscalls.c b/libc/sysdeps/linux/common/syscalls.c index 3c08a853a..1ef7c38b6 100644 --- a/libc/sysdeps/linux/common/syscalls.c +++ b/libc/sysdeps/linux/common/syscalls.c @@ -1427,11 +1427,29 @@ _syscall3(int, mprotect, void *, addr, size_t, len, int, prot); //#define __NR_sigprocmask 126 #ifndef __NR_rt_sigprocmask -#ifdef L_sigprocmask +#ifdef L___syscall_sigprocmask #include <signal.h> -#undef sigprocmask -_syscall3(int, sigprocmask, int, how, const sigset_t *, set, +#define __NR___syscall_sigprocmask __NR_sigprocmask +static inline +_syscall3(int, __syscall_sigprocmask, int, how, const sigset_t *, set, sigset_t *, oldset); +#undef sigprocmask +int sigprocmask(int how, const sigset_t *set, sigset_t *oldset) +{ + if (set && +#if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2) + (((unsigned int) how) > 2) +#else +#warning "compile time assumption violated.. slow path..." + ((how != SIG_BLOCK) && (how != SIG_UNBLOCK) && (how != SIG_SETMASK)) +#endif + ) + { + __set_errno (EINVAL); + return -1; + } + return(__syscall_sigprocmask(how, set, oldset)); +} #endif #endif @@ -1942,7 +1960,19 @@ _syscall4(int, __rt_sigprocmask, int, how, const sigset_t *, set, int sigprocmask(int how, const sigset_t *set, sigset_t *oldset) { - return __rt_sigprocmask(how, set, oldset, _NSIG/8); + if (set && +#if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2) + (((unsigned int) how) > 2) +#else +#warning "compile time assumption violated.. slow path..." + ((how != SIG_BLOCK) && (how != SIG_UNBLOCK) && (how != SIG_SETMASK)) +#endif + ) + { + __set_errno (EINVAL); + return -1; + } + return __rt_sigprocmask(how, set, oldset, _NSIG/8); } #endif #endif |