Repository files (latest commit first)

Filename	Latest commit message	Latest commit date
Lucas De Marchi 4e474a00d7 sysctl: protect poll() in entries that may go away ... Protect code accessing ctl_table by grabbing the header with grab_header() and after releasing with sysctl_head_finish(). This is needed if poll() is called in entries created by modules: currently only hostname and domainname support poll(), but this bug may be triggered when/if modules use it and if user called poll() in a file that doesn't support it. Dave Jones reported the following when using a syscall fuzzer while hibernating/resuming: RIP: 0010:[<ffffffff81233e3e>] [<ffffffff81233e3e>] proc_sys_poll+0x4e/0x90 RAX: 0000000000000145 RBX: ffff88020cab6940 RCX: 0000000000000000 RDX: ffffffff81233df0 RSI: 6b6b6b6b6b6b6b6b RDI: ffff88020cab6940 [ ... ] Code: 00 48 89 fb 48 89 f1 48 8b 40 30 4c 8b 60 e8 b8 45 01 00 00 49 83 7c 24 28 00 74 2e 49 8b 74 24 30 48 85 f6 74 24 48 85 c9 75 32 <8b> 16 b8 45 01 00 00 48 63 d2 49 39 d5 74 10 8b 06 48 98 48 89 If an entry goes away while we are polling() it, ctl_table may not exist anymore. Reported-by: Dave Jones <davej@redhat.com> Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>		2012-03-22 14:46:56 -07:00
..
array.c	Merge branch 'for-linus' of git://selinuxproject.org/~jmorris/linux-security	2012-01-14 18:36:33 -08:00
base.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/audit	2012-01-17 16:41:31 -08:00
cmdline.c
consoles.c	console: rename acquire/release_console_sem() to console_lock/unlock()	2011-01-26 10:50:06 +10:00
cpuinfo.c
devices.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
generic.c	switch procfs to umode_t use	2012-01-03 22:54:56 -05:00
inode.c	procfs: add hidepid= and gid= mount options	2012-01-10 16:30:54 -08:00
internal.h	sysctl: Move the implementation into fs/proc/proc_sysctl.c	2012-01-24 16:37:54 -08:00
interrupts.c
Kconfig	kconfig: rename CONFIG_EMBEDDED to CONFIG_EXPERT	2011-01-20 17:02:05 -08:00
kcore.c	/proc/kcore: fix seeking	2011-01-13 08:03:17 -08:00
kmsg.c
loadavg.c
Makefile	ns: proc files for namespace naming policy.	2011-05-10 14:31:44 -07:00
meminfo.c	fs/proc/meminfo.c: fix compilation error	2011-12-09 07:50:28 -08:00
mmu.c
namespaces.c	vfs: trim includes a bit	2012-01-03 22:57:13 -05:00
nommu.c
page.c	thp: remove PG_buddy	2011-01-13 17:32:43 -08:00
proc_devtree.c	of/flattree: Drop an uninteresting message to pr_debug level	2011-03-02 13:45:18 -07:00
proc_net.c	switch procfs to umode_t use	2012-01-03 22:54:56 -05:00
proc_sysctl.c	sysctl: protect poll() in entries that may go away	2012-03-22 14:46:56 -07:00
proc_tty.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
root.c	procfs: add hidepid= and gid= mount options	2012-01-10 16:30:54 -08:00
softirqs.c	proc: use seq_puts()/seq_putc() where possible	2011-01-13 08:03:16 -08:00
stat.c	sched/accounting, proc: Fix /proc/stat interrupts sum	2012-01-16 08:13:27 +01:00
task_mmu.c	mm: distinguish between mlocked and pinned pages	2011-10-31 17:30:46 -07:00
task_nommu.c	report errors in /proc/*/*map* sanely	2011-03-23 16:36:50 -04:00
uptime.c	Merge branch 'sched/core' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into cputime-tip	2011-12-19 19:23:15 +01:00
version.c
vmcore.c	fs: add export.h to files using EXPORT_SYMBOL/THIS_MODULE macros	2011-10-31 19:30:31 -04:00