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Peter Zijlstra 24ec839c43 [PATCH] tty: ->signal->tty locking ... Fix the locking of signal->tty. Use ->sighand->siglock to protect ->signal->tty; this lock is already used by most other members of ->signal/->sighand. And unless we are 'current' or the tasklist_lock is held we need ->siglock to access ->signal anyway. (NOTE: sys_unshare() is broken wrt ->sighand locking rules) Note that tty_mutex is held over tty destruction, so while holding tty_mutex any tty pointer remains valid. Otherwise the lifetime of ttys are governed by their open file handles. This leaves some holes for tty access from signal->tty (or any other non file related tty access). It solves the tty SLAB scribbles we were seeing. (NOTE: the change from group_send_sig_info to __group_send_sig_info needs to be examined by someone familiar with the security framework, I think it is safe given the SEND_SIG_PRIV from other __group_send_sig_info invocations) [schwidefsky@de.ibm.com: 3270 fix] [akpm@osdl.org: various post-viro fixes] Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: Alan Cox <alan@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Prarit Bhargava <prarit@redhat.com> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Roland McGrath <roland@redhat.com> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: James Morris <jmorris@namei.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Jan Kara <jack@ucw.cz> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>		18 years ago
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skas	[PATCH] uml: correct removal of pte_mkexec	19 years ago
tt	[PATCH] uml ubd driver: various little changes	19 years ago
Makefile	…
asm-offsets.c	…
config.c.in	…
dyn.lds.S	[PATCH] uml: add _text definition to linker scripts	19 years ago
exec.c	[PATCH] tty: ->signal->tty locking	18 years ago
exitcode.c	…
gmon_syms.c	…
gprof_syms.c	…
init_task.c	…
initrd.c	…
irq.c	[PATCH] uml: split memory allocation prototypes out of user.h	19 years ago
ksyms.c	…
mem.c	…
physmem.c	…
process.c	[PATCH] uml: split memory allocation prototypes out of user.h	19 years ago
ptrace.c	…
reboot.c	…
resource.c	…
sigio.c	[PATCH] uml pt_regs fixes	19 years ago
signal.c	…
smp.c	…
syscall.c	…
sysrq.c	…
time.c	[PATCH] uml pt_regs fixes	19 years ago
tlb.c	…
trap.c	…
uaccess.c	…
um_arch.c	…
umid.c	…
uml.lds.S	[PATCH] uml: add _text definition to linker scripts	19 years ago
vmlinux.lds.S	…