WANG Chao 34b4776429 vmcore: fix PT_NOTE n_namesz, n_descsz overflow issue ... When updating PT_NOTE header size (ie. p_memsz), an overflow issue happens with the following bogus note entry: n_namesz = 0xFFFFFFFF n_descsz = 0x0 n_type = 0x0 This kind of note entry should be dropped during updating p_memsz. But because n_namesz is 32bit, after (n_namesz + 3) & (~3), it's overflow to 0x0, the note entry size looks sane and reserved. When userspace (eg. crash utility) is trying to access such bogus note, it could lead to an unexpected behavior (eg. crash utility segment fault because it's reading bogus address). The source of bogus note hasn't been identified yet. At least we could drop the bogus note so user space wouldn't be surprised. Signed-off-by: WANG Chao <chaowang@redhat.com> Cc: Dave Anderson <anderson@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Randy Wright <rwright@hp.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Fabian Frederick <fabf@skynet.be> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Rashika Kheria <rashika.kheria@gmail.com> Cc: Greg Pearson <greg.pearson@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>		2015-02-17 14:34:52 -08:00
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array.c	proc: use %*pb[l] to print bitmaps including cpumasks and nodemasks	2015-02-13 21:21:38 -08:00
base.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2014-12-17 12:31:40 -08:00
cmdline.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
consoles.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
cpuinfo.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
devices.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
fd.c	fs: Convert show_fdinfo functions to void	2014-11-05 14:13:23 -05:00
fd.h	proc: Move proc_fd() to fs/proc/fd.h	2013-05-01 17:29:39 -04:00
generic.c	fs: proc: use PDE() to get proc_dir_entry	2015-02-12 18:54:12 -08:00
inode.c	fs: proc: use PDE() to get proc_dir_entry	2015-02-12 18:54:12 -08:00
internal.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2014-12-16 15:53:03 -08:00
interrupts.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Kconfig	kcore: add Kconfig help text	2013-11-13 12:09:33 +09:00
kcore.c	fs/proc/kcore.c: don't add modules range to kcore if it's equal to vmcore range	2014-10-09 22:25:50 -04:00
kmsg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
loadavg.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
Makefile	proc: Implement /proc/thread-self to point at the directory of the current thread	2014-08-04 10:07:11 -07:00
meminfo.c	fs/proc/meminfo.c: include cma info in proc/meminfo	2014-12-18 19:08:10 -08:00
namespaces.c	kill proc_ns completely	2014-12-10 21:30:57 -05:00
nommu.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
page.c	mm:add KPF_ZERO_PAGE flag for /proc/kpageflags	2015-02-11 17:06:00 -08:00
proc_net.c	fs/proc: use a rb tree for the directory entries	2014-12-10 17:41:09 -08:00
proc_sysctl.c	sysctl: remove typedef ctl_table	2014-08-08 15:57:24 -07:00
proc_tty.c	proc: remove proc_tty_ldisc variable	2014-08-08 15:57:22 -07:00
root.c	fs/proc: use a rb tree for the directory entries	2014-12-10 17:41:09 -08:00
self.c	new helper: readlink_copy()	2014-04-01 23:19:15 -04:00
softirqs.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
stat.c	genirq: Prevent proc race against freeing of irq descriptors	2014-12-13 13:33:07 +01:00
task_mmu.c	fs: proc: task_mmu: show page size in /proc/<pid>/numa_maps	2015-02-12 18:54:12 -08:00
task_nommu.c	proc/maps: make vm_is_stack() logic namespace-friendly	2014-10-09 22:25:50 -04:00
thread_self.c	proc: Implement /proc/thread-self to point at the directory of the current thread	2014-08-04 10:07:11 -07:00
uptime.c	cputime: Default implementation of nsecs -> cputime conversion	2014-03-13 15:56:43 +01:00
version.c	fs/proc: don't use module_init for non-modular core code	2014-01-23 16:37:02 -08:00
vmcore.c	vmcore: fix PT_NOTE n_namesz, n_descsz overflow issue	2015-02-17 14:34:52 -08:00