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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-23 18:11:45 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-23 18:11:45 -0700 |
commit | f9369910a6225b8d4892c3f20ae740a711cd5ace (patch) | |
tree | 8650ff79d7607bceb35509c028400ecf1c317de0 /arch/sparc/kernel | |
parent | 05f144a0d5c2207a0349348127f996e104ad7404 (diff) | |
parent | 415d04d08fec74b226c92c1fb54ad117c9c6bac4 (diff) | |
download | linux-f9369910a6225b8d4892c3f20ae740a711cd5ace.tar.bz2 |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull first series of signal handling cleanups from Al Viro:
"This is just the first part of the queue (about a half of it);
assorted fixes all over the place in signal handling.
This one ends with all sigsuspend() implementations switched to
generic one (->saved_sigmask-based).
With this, a bunch of assorted old buglets are fixed and most of the
missing bits of NOTIFY_RESUME hookup are in place. Two more fixes sit
in arm and um trees respectively, and there's a couple of broken ones
that need obvious fixes - parisc and avr32 check TIF_NOTIFY_RESUME
only on one of two codepaths; fixes for that will happen in the next
series"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (55 commits)
unicore32: if there's no handler we need to restore sigmask, syscall or no syscall
xtensa: add handling of TIF_NOTIFY_RESUME
microblaze: drop 'oldset' argument of do_notify_resume()
microblaze: handle TIF_NOTIFY_RESUME
score: add handling of NOTIFY_RESUME to do_notify_resume()
m68k: add TIF_NOTIFY_RESUME and handle it.
sparc: kill ancient comment in sparc_sigaction()
h8300: missing checks of __get_user()/__put_user() return values
frv: missing checks of __get_user()/__put_user() return values
cris: missing checks of __get_user()/__put_user() return values
powerpc: missing checks of __get_user()/__put_user() return values
sh: missing checks of __get_user()/__put_user() return values
sparc: missing checks of __get_user()/__put_user() return values
avr32: struct old_sigaction is never used
m32r: struct old_sigaction is never used
xtensa: xtensa_sigaction doesn't exist
alpha: tidy signal delivery up
score: don't open-code force_sigsegv()
cris: don't open-code force_sigsegv()
blackfin: don't open-code force_sigsegv()
...
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r-- | arch/sparc/kernel/signal32.c | 10 | ||||
-rw-r--r-- | arch/sparc/kernel/signal_32.c | 12 | ||||
-rw-r--r-- | arch/sparc/kernel/signal_64.c | 13 | ||||
-rw-r--r-- | arch/sparc/kernel/sys_sparc_32.c | 17 |
4 files changed, 14 insertions, 38 deletions
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c index 948700fb9036..bb1513e45f1a 100644 --- a/arch/sparc/kernel/signal32.c +++ b/arch/sparc/kernel/signal32.c @@ -215,8 +215,9 @@ void do_sigreturn32(struct pt_regs *regs) (((unsigned long) sf) & 3)) goto segv; - get_user(pc, &sf->info.si_regs.pc); - __get_user(npc, &sf->info.si_regs.npc); + if (get_user(pc, &sf->info.si_regs.pc) || + __get_user(npc, &sf->info.si_regs.npc)) + goto segv; if ((pc | npc) & 3) goto segv; @@ -305,8 +306,9 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs) (((unsigned long) sf) & 3)) goto segv; - get_user(pc, &sf->regs.pc); - __get_user(npc, &sf->regs.npc); + if (get_user(pc, &sf->regs.pc) || + __get_user(npc, &sf->regs.npc)) + goto segv; if ((pc | npc) & 3) goto segv; diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c index ac8e66b50f07..2b7e849f7c65 100644 --- a/arch/sparc/kernel/signal_32.c +++ b/arch/sparc/kernel/signal_32.c @@ -64,18 +64,8 @@ struct rt_signal_frame { static int _sigpause_common(old_sigset_t set) { sigset_t blocked; - - current->saved_sigmask = current->blocked; - - set &= _BLOCKABLE; siginitset(&blocked, set); - set_current_blocked(&blocked); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_thread_flag(TIF_RESTORE_SIGMASK); - - return -ERESTARTNOHAND; + return sigsuspend(&blocked); } asmlinkage int sys_sigsuspend(old_sigset_t set) diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c index 48b0f57b65f7..eafaab486b2d 100644 --- a/arch/sparc/kernel/signal_64.c +++ b/arch/sparc/kernel/signal_64.c @@ -242,19 +242,8 @@ struct rt_signal_frame { static long _sigpause_common(old_sigset_t set) { sigset_t blocked; - - current->saved_sigmask = current->blocked; - - set &= _BLOCKABLE; siginitset(&blocked, set); - set_current_blocked(&blocked); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - - set_restore_sigmask(); - - return -ERESTARTNOHAND; + return sigsuspend(&blocked); } asmlinkage long sys_sigpause(unsigned int set) diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c index 627e89af1d71..0c9b31b22e07 100644 --- a/arch/sparc/kernel/sys_sparc_32.c +++ b/arch/sparc/kernel/sys_sparc_32.c @@ -184,10 +184,10 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act, if (!access_ok(VERIFY_READ, act, sizeof(*act)) || __get_user(new_ka.sa.sa_handler, &act->sa_handler) || - __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) || + __get_user(new_ka.sa.sa_flags, &act->sa_flags) || + __get_user(mask, &act->sa_mask)) return -EFAULT; - __get_user(new_ka.sa.sa_flags, &act->sa_flags); - __get_user(mask, &act->sa_mask); siginitset(&new_ka.sa.sa_mask, mask); new_ka.ka_restorer = NULL; } @@ -195,17 +195,12 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act, ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); if (!ret && oact) { - /* In the clone() case we could copy half consistent - * state to the user, however this could sleep and - * deadlock us if we held the signal lock on SMP. So for - * now I take the easy way out and do no locking. - */ if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || - __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) || + __put_user(old_ka.sa.sa_flags, &oact->sa_flags) || + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask)) return -EFAULT; - __put_user(old_ka.sa.sa_flags, &oact->sa_flags); - __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); } return ret; |