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Alexey Dobriyan 86a2bb5ad8 coredump: fix spam with zero VMA process 
Nobody ever tried to self destruct by unmapping whole address space at
once:

	munmap((void *)0, (1ULL << 47) - 4096);

Doing this produces 2 warnings for zero-length vmalloc allocations:

  a.out[1353]: segfault at 7f80bcc4b757 ip 00007f80bcc4b757 sp 00007fff683939b8 error 14
  a.out: vmalloc: allocation failure: 0 bytes, mode:0xcc0(GFP_KERNEL), nodemask=(null)
	...
  a.out: vmalloc: allocation failure: 0 bytes, mode:0xcc0(GFP_KERNEL), nodemask=(null)
	...

Fix is to switch to kvmalloc().

Steps to reproduce:

	// vsyscall=none
	#include <sys/mman.h>
	#include <sys/resource.h>
	int main(void)
	{
		setrlimit(RLIMIT_CORE, &(struct rlimit){RLIM_INFINITY, RLIM_INFINITY});
		munmap((void *)0, (1ULL << 47) - 4096);
		return 0;
	}

Link: http://lkml.kernel.org/r/20180410180353.GA2515@avx2
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-06-15 07:55:24 +09:00
..
9p
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
adfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
affs
affs: fix potential memory leak when parsing option 'prefix'
2018-05-28 12:36:41 +02:00
afs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
autofs
autofs: Fix typo s/thenew new/the new/ in AUTOFS4_FS description
2018-06-12 12:31:19 -07:00
befs
befs_lookup(): use d_splice_alias()
2018-05-21 14:30:07 -04:00
bfs
bfs_add_entry: pass name/len as qstr pointer
2018-05-22 14:27:50 -04:00
btrfs
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
cachefiles
Merge branch 'hch.procfs' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:00:01 -07:00
ceph
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
cifs
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
coda
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
configfs
…
cramfs
cramfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
crypto
f2fs-for-4.18-rc1
2018-06-11 10:16:13 -07:00
debugfs
Revert "debugfs: inode: debugfs_create_dir uses mode permission from parent"
2018-06-12 20:52:16 -07:00
devpts
devpts: comment devpts_mntget()
2018-03-14 13:31:23 +01:00
dlm
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
ecryptfs
Merge branch 'fixes' of https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs into aio-base
2018-05-26 09:16:25 +02:00
efivarfs
efivarfs: Limit the rate for non-root to read files
2018-02-22 10:21:02 -08:00
efs
…
exofs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
exportfs
ovl: do not try to reconnect a disconnected origin dentry
2018-04-12 12:04:49 +02:00
ext2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
ext4
treewide: kvmalloc() -> kvmalloc_array()
2018-06-12 16:19:22 -07:00
f2fs
treewide: Use array_size in f2fs_kvzalloc()
2018-06-12 16:19:22 -07:00
fat
fat: use fat_fs_error() instead of BUG_ON() in __fat_get_block()
2018-06-15 07:55:24 +09:00
freevxfs
freevxfs_lookup(): use d_splice_alias()
2018-05-22 14:27:51 -04:00
fscache
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fuse
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
gfs2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
hfs
hfs: don't allow mounting over .../rsrc
2018-05-22 14:28:00 -04:00
hfsplus
Merge branch 'work.lookup' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 13:46:22 -07:00
hostfs
hostfs: rename do_rmdir() to hostfs_do_rmdir()
2018-04-02 20:15:53 +02:00
hpfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
hugetlbfs
hugetlbfs: fix bug in pgoff overflow checking
2018-04-05 21:36:21 -07:00
isofs
isofs: fix potential memory leak in mount option parsing
2018-04-16 09:47:41 +02:00
jbd2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
jffs2
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
jfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
kernfs
Driver core changes for 4.18-rc1
2018-06-05 16:29:19 -07:00
lockd
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
minix
minix_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
nfs
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
nfs_common
net: Drop pernet_operations::async
2018-03-27 13:18:09 -04:00
nfsd
- Error path bug fix for overflow tests (Dan)
2018-06-12 18:28:00 -07:00
nilfs2
do d_instantiate/unlock_new_inode combinations safely
2018-05-11 15:36:37 -04:00
nls
…
notify
fsnotify: fix ignore mask logic in send_to_group()
2018-04-13 15:52:49 +02:00
ntfs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
ocfs2
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
omfs
omfs_lookup(): report IO errors, use d_splice_alias()
2018-05-22 14:27:58 -04:00
openpromfs
openpromfs: switch to d_splice_alias()
2018-05-22 14:27:57 -04:00
orangefs
orangefs: fixes and cleanups
2018-06-07 09:23:12 -07:00
overlayfs
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
proc
proc: skip branch in /proc/*/* lookup
2018-06-15 07:55:24 +09:00
pstore
pstore: fix crypto dependencies without compression
2018-04-06 15:45:33 -07:00
qnx4
qnx4_lookup: use d_splice_alias()
2018-05-22 14:27:52 -04:00
qnx6
qnx6_lookup: switch to d_splice_alias()
2018-05-22 14:27:54 -04:00
quota
fs: quota: Replace GFP_ATOMIC with GFP_KERNEL in dquot_init
2018-04-09 17:48:54 +02:00
ramfs
…
reiserfs
treewide: Use array_size() in vzalloc()
2018-06-12 16:19:22 -07:00
romfs
romfs_lookup: switch to d_splice_alias()
2018-05-22 14:27:55 -04:00
squashfs
…
sysfs
unfuck sysfs_mount()
2018-05-21 14:30:09 -04:00
sysv
sysv_lookup: use d_splice_alias()
2018-05-22 14:27:53 -04:00
tracefs
…
ubifs
treewide: Use array_size() in vmalloc()
2018-06-12 16:19:22 -07:00
udf
treewide: kzalloc() -> kcalloc()
2018-06-12 16:19:22 -07:00
ufs
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
xfs
Changes since last update:
2018-06-12 15:49:00 -07:00
aio.c
fs: aio ioprio use ioprio_check_cap ret val
2018-06-04 14:20:39 -04:00
anon_inodes.c
…
attr.c
fs: Allow superblock owner to replace invalid owners of inodes
2018-05-24 11:57:18 -05:00
bad_inode.c
…
binfmt_aout.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_elf_fdpic.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
binfmt_elf.c
coredump: fix spam with zero VMA process
2018-06-15 07:55:24 +09:00
binfmt_em86.c
…
binfmt_flat.c
exec: introduce finalize_exec() before start_thread()
2018-04-11 10:28:37 -07:00
binfmt_misc.c
fs/binfmt_misc.c: do not allow offset overflow
2018-06-07 17:34:39 -07:00
binfmt_script.c
…
block_dev.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
buffer.c
fs: move page_cache_seek_hole_data to iomap.c
2018-06-01 18:37:33 -07:00
char_dev.c
block, char_dev: Use correct format specifier for unsigned ints
2018-03-15 17:59:24 +01:00
compat_binfmt_elf.c
…
compat_ioctl.c
autofs: clean up includes
2018-06-07 17:34:40 -07:00
compat.c
ncpfs: remove compat functionality
2018-06-05 19:23:26 +02:00
coredump.c
…
d_path.c
split d_path() and friends into a separate file
2018-03-29 15:07:46 -04:00
dax.c
libnvdimm for 4.18
2018-06-08 17:21:52 -07:00
dcache.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:14:28 -07:00
dcookies.c
fs: add do_lookup_dcookie() helper; remove in-kernel call to syscall
2018-04-02 20:15:39 +02:00
direct-io.c
block: consistently use GFP_NOIO instead of __GFP_NORECLAIM
2018-05-14 08:55:18 -06:00
drop_caches.c
…
eventfd.c
eventfd: switch to ->poll_mask
2018-05-26 09:16:44 +02:00
eventpoll.c
fs: add new vfs_poll and file_can_poll helpers
2018-05-26 09:16:44 +02:00
exec.c
Merge branch 'core-rseq-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2018-06-10 10:17:09 -07:00
fcntl.c
mm: restructure memfd code
2018-06-07 17:34:35 -07:00
fhandle.c
vfs: Copy struct mount.mnt_id to userspace using put_user()
2018-01-15 12:07:51 -08:00
file_table.c
…
file.c
fs: add ksys_close() wrapper; remove in-kernel calls to sys_close()
2018-04-02 20:16:00 +02:00
filesystems.c
proc: introduce proc_create_single{,_data}
2018-05-16 07:23:35 +02:00
fs_pin.c
…
fs_struct.c
…
fs-writeback.c
bdi: Fix oops in wb_workfn()
2018-05-03 16:11:37 -06:00
inode.c
overlayfs fixes for 4.18
2018-06-07 08:53:50 -07:00
internal.h
Revert "fs: fold open_check_o_direct into do_dentry_open"
2018-06-03 10:58:23 -07:00
ioctl.c
fs: Allow CAP_SYS_ADMIN in s_user_ns to freeze and thaw filesystems
2018-05-24 12:04:28 -05:00
iomap.c
Changes since last update:
2018-06-12 15:49:00 -07:00
Kconfig
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
Kconfig.binfmt
treewide: simplify Kconfig dependencies for removed archs
2018-03-26 15:55:57 +02:00
libfs.c
fs, dax: prepare for dax-specific address_space_operations
2018-03-30 11:34:55 -07:00
locks.c
proc: introduce proc_create_seq_private
2018-05-16 07:23:35 +02:00
Makefile
autofs: remove left-over autofs4 stubs
2018-06-11 08:22:34 -07:00
mbcache.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
mount.h
…
mpage.c
…
namei.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
namespace.c
fs: Allow superblock owner to access do_remount_sb()
2018-05-24 12:02:25 -05:00
no-block.c
…
nsfs.c
net: Export open_related_ns()
2018-02-15 15:34:42 -05:00
open.c
Revert "fs: fold open_check_o_direct into do_dentry_open"
2018-06-03 10:58:23 -07:00
pipe.c
pipe: convert to ->poll_mask
2018-05-26 09:16:44 +02:00
pnode.c
…
pnode.h
…
posix_acl.c
…
proc_namespace.c
vfs: do bulk POLL* -> EPOLL* replacement
2018-02-11 14:34:03 -08:00
read_write.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
readdir.c
fs: add ksys_getdents64() helper; remove in-kernel calls to sys_getdents64()
2018-04-02 20:16:02 +02:00
select.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
seq_file.c
proc: fix smaps and meminfo alignment
2018-05-25 18:12:11 -07:00
signalfd.c
signal: Extend siginfo_layout with SIL_FAULT_{MCEERR|BNDERR|PKUERR}
2018-04-26 19:51:14 -05:00
splice.c
treewide: kmalloc() -> kmalloc_array()
2018-06-12 16:19:22 -07:00
stack.c
…
stat.c
fs: add do_readlinkat() helper; remove internal call to sys_readlinkat()
2018-04-02 20:15:34 +02:00
statfs.c
…
super.c
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2018-06-04 10:14:28 -07:00
sync.c
Changes for this release:
2018-04-04 12:44:02 -07:00
timerfd.c
timerfd: convert to ->poll_mask
2018-05-26 09:16:44 +02:00
userfaultfd.c
userfaultfd: prevent non-cooperative events vs mcopy_atomic races
2018-06-07 17:34:38 -07:00
utimes.c
fs: add do_compat_futimesat() helper; remove in-kernel call to compat syscall
2018-04-02 20:15:44 +02:00
xattr.c
vfs: delete unnecessary assignment in vfs_listxattr
2018-05-29 13:22:41 -04:00