diff options
author | Arnd Bergmann <arnd@arndb.de> | 2022-02-14 22:22:10 +0300 |
---|---|---|
committer | Arnd Bergmann <arnd@arndb.de> | 2022-02-25 11:36:05 +0300 |
commit | 23fc539e81295b14b50c6ccc5baeb4f3d59d822d (patch) | |
tree | c4efbc0e265a797a6284fa49a66c19b16b6c5005 | |
parent | 52fe8d125c9afecc6fff6afd9950a388488df2ce (diff) | |
download | linux-23fc539e81295b14b50c6ccc5baeb4f3d59d822d.tar.xz |
uaccess: fix type mismatch warnings from access_ok()
On some architectures, access_ok() does not do any argument type
checking, so replacing the definition with a generic one causes
a few warnings for harmless issues that were never caught before.
Fix the ones that I found either through my own test builds or
that were reported by the 0-day bot.
Reported-by: kernel test robot <lkp@intel.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
-rw-r--r-- | arch/arc/kernel/process.c | 2 | ||||
-rw-r--r-- | arch/arm/kernel/swp_emulate.c | 2 | ||||
-rw-r--r-- | arch/arm/kernel/traps.c | 2 | ||||
-rw-r--r-- | arch/csky/kernel/perf_callchain.c | 2 | ||||
-rw-r--r-- | arch/csky/kernel/signal.c | 2 | ||||
-rw-r--r-- | arch/nios2/kernel/signal.c | 20 | ||||
-rw-r--r-- | arch/powerpc/lib/sstep.c | 4 | ||||
-rw-r--r-- | arch/riscv/kernel/perf_callchain.c | 4 | ||||
-rw-r--r-- | arch/sparc/kernel/signal_32.c | 2 | ||||
-rw-r--r-- | lib/test_lockup.c | 4 |
10 files changed, 23 insertions, 21 deletions
diff --git a/arch/arc/kernel/process.c b/arch/arc/kernel/process.c index 8e90052f6f05..5f7f5aab361f 100644 --- a/arch/arc/kernel/process.c +++ b/arch/arc/kernel/process.c @@ -43,7 +43,7 @@ SYSCALL_DEFINE0(arc_gettls) return task_thread_info(current)->thr_ptr; } -SYSCALL_DEFINE3(arc_usr_cmpxchg, int *, uaddr, int, expected, int, new) +SYSCALL_DEFINE3(arc_usr_cmpxchg, int __user *, uaddr, int, expected, int, new) { struct pt_regs *regs = current_pt_regs(); u32 uval; diff --git a/arch/arm/kernel/swp_emulate.c b/arch/arm/kernel/swp_emulate.c index 6166ba38bf99..b74bfcf94fb1 100644 --- a/arch/arm/kernel/swp_emulate.c +++ b/arch/arm/kernel/swp_emulate.c @@ -195,7 +195,7 @@ static int swp_handler(struct pt_regs *regs, unsigned int instr) destreg, EXTRACT_REG_NUM(instr, RT2_OFFSET), data); /* Check access in reasonable access range for both SWP and SWPB */ - if (!access_ok((address & ~3), 4)) { + if (!access_ok((void __user *)(address & ~3), 4)) { pr_debug("SWP{B} emulation: access to %p not allowed!\n", (void *)address); res = -EFAULT; diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c index da04ed85855a..26c8c8276297 100644 --- a/arch/arm/kernel/traps.c +++ b/arch/arm/kernel/traps.c @@ -576,7 +576,7 @@ do_cache_op(unsigned long start, unsigned long end, int flags) if (end < start || flags) return -EINVAL; - if (!access_ok(start, end - start)) + if (!access_ok((void __user *)start, end - start)) return -EFAULT; return __do_cache_op(start, end); diff --git a/arch/csky/kernel/perf_callchain.c b/arch/csky/kernel/perf_callchain.c index 92057de08f4f..1612f4354087 100644 --- a/arch/csky/kernel/perf_callchain.c +++ b/arch/csky/kernel/perf_callchain.c @@ -49,7 +49,7 @@ static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry, { struct stackframe buftail; unsigned long lr = 0; - unsigned long *user_frame_tail = (unsigned long *)fp; + unsigned long __user *user_frame_tail = (unsigned long __user *)fp; /* Check accessibility of one struct frame_tail beyond */ if (!access_ok(user_frame_tail, sizeof(buftail))) diff --git a/arch/csky/kernel/signal.c b/arch/csky/kernel/signal.c index c7b763d2f526..8867ddf3e6c7 100644 --- a/arch/csky/kernel/signal.c +++ b/arch/csky/kernel/signal.c @@ -136,7 +136,7 @@ static inline void __user *get_sigframe(struct ksignal *ksig, static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { - struct rt_sigframe *frame; + struct rt_sigframe __user *frame; int err = 0; frame = get_sigframe(ksig, regs, sizeof(*frame)); diff --git a/arch/nios2/kernel/signal.c b/arch/nios2/kernel/signal.c index 2009ae2d3c3b..386e46443b60 100644 --- a/arch/nios2/kernel/signal.c +++ b/arch/nios2/kernel/signal.c @@ -36,10 +36,10 @@ struct rt_sigframe { static inline int rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, - struct ucontext *uc, int *pr2) + struct ucontext __user *uc, int *pr2) { int temp; - unsigned long *gregs = uc->uc_mcontext.gregs; + unsigned long __user *gregs = uc->uc_mcontext.gregs; int err; /* Always make any pending restarted system calls return -EINTR */ @@ -102,10 +102,11 @@ asmlinkage int do_rt_sigreturn(struct switch_stack *sw) { struct pt_regs *regs = (struct pt_regs *)(sw + 1); /* Verify, can we follow the stack back */ - struct rt_sigframe *frame = (struct rt_sigframe *) regs->sp; + struct rt_sigframe __user *frame; sigset_t set; int rval; + frame = (struct rt_sigframe __user *) regs->sp; if (!access_ok(frame, sizeof(*frame))) goto badframe; @@ -124,10 +125,10 @@ badframe: return 0; } -static inline int rt_setup_ucontext(struct ucontext *uc, struct pt_regs *regs) +static inline int rt_setup_ucontext(struct ucontext __user *uc, struct pt_regs *regs) { struct switch_stack *sw = (struct switch_stack *)regs - 1; - unsigned long *gregs = uc->uc_mcontext.gregs; + unsigned long __user *gregs = uc->uc_mcontext.gregs; int err = 0; err |= __put_user(MCONTEXT_VERSION, &uc->uc_mcontext.version); @@ -162,8 +163,9 @@ static inline int rt_setup_ucontext(struct ucontext *uc, struct pt_regs *regs) return err; } -static inline void *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, - size_t frame_size) +static inline void __user *get_sigframe(struct ksignal *ksig, + struct pt_regs *regs, + size_t frame_size) { unsigned long usp; @@ -174,13 +176,13 @@ static inline void *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, usp = sigsp(usp, ksig); /* Verify, is it 32 or 64 bit aligned */ - return (void *)((usp - frame_size) & -8UL); + return (void __user *)((usp - frame_size) & -8UL); } static int setup_rt_frame(struct ksignal *ksig, sigset_t *set, struct pt_regs *regs) { - struct rt_sigframe *frame; + struct rt_sigframe __user *frame; int err = 0; frame = get_sigframe(ksig, regs, sizeof(*frame)); diff --git a/arch/powerpc/lib/sstep.c b/arch/powerpc/lib/sstep.c index a94b0cd0bdc5..022d23ae300b 100644 --- a/arch/powerpc/lib/sstep.c +++ b/arch/powerpc/lib/sstep.c @@ -112,9 +112,9 @@ static nokprobe_inline long address_ok(struct pt_regs *regs, { if (!user_mode(regs)) return 1; - if (__access_ok(ea, nb)) + if (access_ok((void __user *)ea, nb)) return 1; - if (__access_ok(ea, 1)) + if (access_ok((void __user *)ea, 1)) /* Access overlaps the end of the user region */ regs->dar = TASK_SIZE_MAX - 1; else diff --git a/arch/riscv/kernel/perf_callchain.c b/arch/riscv/kernel/perf_callchain.c index 1fc075b8f764..55faa4991b87 100644 --- a/arch/riscv/kernel/perf_callchain.c +++ b/arch/riscv/kernel/perf_callchain.c @@ -15,8 +15,8 @@ static unsigned long user_backtrace(struct perf_callchain_entry_ctx *entry, { struct stackframe buftail; unsigned long ra = 0; - unsigned long *user_frame_tail = - (unsigned long *)(fp - sizeof(struct stackframe)); + unsigned long __user *user_frame_tail = + (unsigned long __user *)(fp - sizeof(struct stackframe)); /* Check accessibility of one struct frame_tail beyond */ if (!access_ok(user_frame_tail, sizeof(buftail))) diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c index ffab16369bea..74f80443b195 100644 --- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -65,7 +65,7 @@ struct rt_signal_frame { */ static inline bool invalid_frame_pointer(void __user *fp, int fplen) { - if ((((unsigned long) fp) & 15) || !__access_ok((unsigned long)fp, fplen)) + if ((((unsigned long) fp) & 15) || !access_ok(fp, fplen)) return true; return false; diff --git a/lib/test_lockup.c b/lib/test_lockup.c index 906b598740a7..6a0f329a794a 100644 --- a/lib/test_lockup.c +++ b/lib/test_lockup.c @@ -417,8 +417,8 @@ static bool test_kernel_ptr(unsigned long addr, int size) return false; /* should be at least readable kernel address */ - if (access_ok(ptr, 1) || - access_ok(ptr + size - 1, 1) || + if (access_ok((void __user *)ptr, 1) || + access_ok((void __user *)ptr + size - 1, 1) || get_kernel_nofault(buf, ptr) || get_kernel_nofault(buf, ptr + size - 1)) { pr_err("invalid kernel ptr: %#lx\n", addr); |