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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-01-14 14:14:02 +0100 |
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committer | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-01-14 14:15:18 +0100 |
commit | 6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0 (patch) | |
tree | eb33a94f5e4b0e035001f7c96ef44cade0fbb489 /fs/open.c | |
parent | ed6bb6194350dc6ae97a65dbf2d621a3dbe6bbe9 (diff) | |
download | kernel_samsung_tuna-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.zip kernel_samsung_tuna-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.tar.gz kernel_samsung_tuna-6673e0c3fbeaed2cd08e2fd4a4aa97382d6fedb0.tar.bz2 |
[CVE-2009-0029] System call wrapper special cases
System calls with an unsigned long long argument can't be converted with
the standard wrappers since that would include a cast to long, which in
turn means that we would lose the upper 32 bit on 32 bit architectures.
Also semctl can't use the standard wrapper since it has a 'union'
parameter.
So we handle them as special case and add some extra wrappers instead.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'fs/open.c')
-rw-r--r-- | fs/open.c | 27 |
1 files changed, 24 insertions, 3 deletions
@@ -351,21 +351,35 @@ asmlinkage long sys_ftruncate(unsigned int fd, unsigned long length) /* LFS versions of truncate are only needed on 32 bit machines */ #if BITS_PER_LONG == 32 -asmlinkage long sys_truncate64(const char __user * path, loff_t length) +SYSCALL_DEFINE(truncate64)(const char __user * path, loff_t length) { return do_sys_truncate(path, length); } +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS +asmlinkage long SyS_truncate64(long path, loff_t length) +{ + return SYSC_truncate64((const char __user *) path, length); +} +SYSCALL_ALIAS(sys_truncate64, SyS_truncate64); +#endif -asmlinkage long sys_ftruncate64(unsigned int fd, loff_t length) +SYSCALL_DEFINE(ftruncate64)(unsigned int fd, loff_t length) { long ret = do_sys_ftruncate(fd, length, 0); /* avoid REGPARM breakage on x86: */ asmlinkage_protect(2, ret, fd, length); return ret; } +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS +asmlinkage long SyS_ftruncate64(long fd, loff_t length) +{ + return SYSC_ftruncate64((unsigned int) fd, length); +} +SYSCALL_ALIAS(sys_ftruncate64, SyS_ftruncate64); #endif +#endif /* BITS_PER_LONG == 32 */ -asmlinkage long sys_fallocate(int fd, int mode, loff_t offset, loff_t len) +SYSCALL_DEFINE(fallocate)(int fd, int mode, loff_t offset, loff_t len) { struct file *file; struct inode *inode; @@ -422,6 +436,13 @@ out_fput: out: return ret; } +#ifdef CONFIG_HAVE_SYSCALL_WRAPPERS +asmlinkage long SyS_fallocate(long fd, long mode, loff_t offset, loff_t len) +{ + return SYSC_fallocate((int)fd, (int)mode, offset, len); +} +SYSCALL_ALIAS(sys_fallocate, SyS_fallocate); +#endif /* * access() needs to use the real uid/gid, not the effective uid/gid. |