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51eba99970
linux_dsm_epyc7002/fs
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David Howells 51eba99970 afs: Fix "kAFS: AFS vnode with undefined type 0" 
Under some circumstances afs_select_fileserver() can return without setting
an error in fc->error.  The problem is in the no_more_servers segment where
the accumulated errors from attempts to contact various servers are
integrated into an afs_error-type variable 'e'.  The resultant error code
is, however, then abandoned.

Fix this by getting the error out of e.error and putting it in 'error' so
that the next part will store it into fc->error.

Not doing this causes a report like the following:

    kAFS: AFS vnode with undefined type 0
    kAFS: A=0 m=0 s=0 v=0
    kAFS: vnode 20000025:1:1

because the code following the server selection loop then sees what it
thinks is a successful invocation because fc.error is 0.  However, it can't
apply the status record because it's all zeros.

The report is followed on the first instance with a trace looking something
like:

     dump_stack+0x67/0x8e
     afs_inode_init_from_status.isra.2+0x21b/0x487
     afs_fetch_status+0x119/0x1df
     afs_iget+0x130/0x295
     afs_get_tree+0x31d/0x595
     vfs_get_tree+0x1f/0xe8
     fc_mount+0xe/0x36
     afs_d_automount+0x328/0x3c3
     follow_managed+0x109/0x20a
     lookup_fast+0x3bf/0x3f8
     do_last+0xc3/0x6a4
     path_openat+0x1af/0x236
     do_filp_open+0x51/0xae
     ? _raw_spin_unlock+0x24/0x2d
     ? __alloc_fd+0x1a5/0x1b7
     do_sys_open+0x13b/0x1e8
     do_syscall_64+0x7d/0x1b3
     entry_SYSCALL_64_after_hwframe+0x49/0xbe

Fixes: 4584ae96ae ("afs: Fix missing net error handling")
Signed-off-by: David Howells <dhowells@redhat.com>
2019-05-16 15:48:20 +01:00
..
9p 9p: switch to ->free_inode() 2019-05-01 22:43:23 -04:00
adfs Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
affs Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
afs afs: Fix "kAFS: AFS vnode with undefined type 0" 2019-05-16 15:48:20 +01:00
autofs autofs: fix use-after-free in lockless ->d_manage() 2019-04-09 19:18:19 -04:00
befs befs: switch to ->free_inode() 2019-05-01 22:43:23 -04:00
bfs bfs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
btrfs for-5.2/block-20190507 2019-05-07 18:14:36 -07:00
cachefiles fscache, cachefiles: remove redundant variable 'cache' 2018-11-30 16:00:58 +00:00
ceph Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
cifs dns_resolver: Allow used keys to be invalidated 2019-05-15 17:35:54 +01:00
coda coda: switch to ->free_inode() 2019-05-01 22:43:26 -04:00
configfs fs: mark expected switch fall-throughs 2019-04-08 18:21:02 -05:00
cramfs Make the Cramfs code more robust against filesystem corruptions, 2018-10-30 12:46:25 -07:00
crypto Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
debugfs Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:03:32 -07:00
devpts fs/devpts: always delete dcache dentry-s in dput() 2019-01-24 13:38:30 -05:00
dlm genetlink: optionally validate strictly/dumps 2019-04-27 17:07:22 -04:00
ecryptfs Merge branch 'work.icache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 10:57:05 -07:00
efivarfs
efs efs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
exportfs exportfs: do not read dentry after free 2018-11-23 09:08:17 -05:00
ext2 ext2: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
ext4 Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
f2fs Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
fat fat: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
freevxfs freevxfs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
fscache fscache: fix race between enablement and dropping of object 2018-11-30 15:57:31 +00:00
fuse Merge branch 'work.icache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 10:57:05 -07:00
gfs2 for-5.2/block-20190507 2019-05-07 18:14:36 -07:00
hfs hfs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
hfsplus hfsplus: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
hostfs hostfs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
hpfs hpfs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
hugetlbfs hugetlb: make use of ->free_inode() 2019-05-01 22:43:27 -04:00
isofs isofs: switch to ->free_inode() 2019-05-01 22:43:24 -04:00
jbd2 jbd2: check superblock mapped prior to committing 2019-04-06 18:57:40 -04:00
jffs2 Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
jfs Several minor jfs fixes 2019-05-07 11:37:27 -07:00
kernfs Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:03:32 -07:00
lockd NFS: fix mount/umount race in nlmclnt. 2019-03-18 22:39:34 -04:00
minix minix: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
nfs dns_resolver: Allow used keys to be invalidated 2019-05-15 17:35:54 +01:00
nfs_common
nfsd Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
nilfs2 nilfs2: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
nls
notify Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:03:32 -07:00
ntfs ntfs: switch to ->free_inode() 2019-05-01 22:43:26 -04:00
ocfs2 for-5.2/block-20190507 2019-05-07 18:14:36 -07:00
omfs
openpromfs openpromfs: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
orangefs orangefs: make use of ->free_inode() 2019-05-01 22:43:27 -04:00
overlayfs Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:03:32 -07:00
proc Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2019-05-07 22:03:58 -07:00
pstore treewide: Switch printk users from %pf and %pF to %ps and %pS, respectively 2019-04-09 14:19:06 +02:00
qnx4 qnx4: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
qnx6 qnx6: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
quota quota: Lock s_umount in exclusive mode for Q_XQUOTA{ON,OFF} quotactls. 2018-12-18 18:29:15 +01:00
ramfs
reiserfs reiserfs: convert to ->free_inode() 2019-05-01 22:43:25 -04:00
romfs romfs: convert to ->free_inode() 2019-05-01 22:43:25 -04:00
squashfs squashfs: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
sysfs Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-03-16 10:31:02 -07:00
sysv Merge branch 'work.dcache' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:03:32 -07:00
tracefs
ubifs Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
udf udf: switch to ->free_inode() 2019-05-01 22:43:25 -04:00
ufs Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
unicode unicode: refactor the rule for regenerating utf8data.h 2019-04-28 13:45:36 -04:00
xfs for-5.2/block-20190507 2019-05-07 18:14:36 -07:00
aio.c aio: use kmem_cache_free() instead of kfree() 2019-04-04 20:13:59 -04:00
anon_inodes.c
attr.c
bad_inode.c
binfmt_aout.c a.out: remove core dumping support 2019-03-05 10:00:35 -08:00
binfmt_elf_fdpic.c
binfmt_elf.c fs/binfmt_elf.c: spread const a little 2019-03-07 18:32:01 -08:00
binfmt_em86.c
binfmt_flat.c
binfmt_misc.c
binfmt_script.c exec: load_script: Do not exec truncated interpreter path 2019-02-18 16:49:36 -08:00
block_dev.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:50:27 -07:00
buffer.c iomap: Fix use-after-free error in page_done callback 2019-05-01 07:47:37 -07:00
char_dev.c chardev: update comment based on the code 2019-04-02 17:49:58 +02:00
compat_binfmt_elf.c
compat_ioctl.c media updates for v4.20-rc1 2018-10-29 14:29:58 -07:00
compat.c
coredump.c
d_path.c
dax.c fs/dax: Deposit pagetable even when installing zero page 2019-03-13 13:58:46 -07:00
dcache.c Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
dcookies.c
direct-io.c block: remove the i argument to bio_for_each_segment_all 2019-04-30 09:26:13 -06:00
drop_caches.c fs/drop_caches.c: avoid softlockups in drop_pagecache_sb() 2019-02-01 15:46:24 -08:00
eventfd.c
eventpoll.c epoll: use rwlock in order to reduce ep_poll_callback() contention 2019-03-07 18:32:01 -08:00
exec.c exec: increase BINPRM_BUF_SIZE to 256 2019-03-07 18:32:01 -08:00
fcntl.c fs: mark expected switch fall-throughs 2019-04-08 18:21:02 -05:00
fhandle.c
file_table.c vfs: syscall: Add open_tree(2) to reference or clone a mount 2019-03-20 18:49:06 -04:00
file.c io_uring-2019-03-06 2019-03-08 14:48:40 -08:00
filesystems.c vfs: Implement a filesystem superblock creation/configuration context 2019-02-28 03:29:26 -05:00
fs_context.c vfs: syscall: Add fsconfig() for configuring and managing a context 2019-03-20 18:49:06 -04:00
fs_parser.c fs: fs_parser: fix printk format warning 2019-03-29 10:01:38 -07:00
fs_pin.c
fs_struct.c
fs_types.c fs: common implementation of file type 2019-01-21 17:48:13 +01:00
fs-writeback.c writeback: synchronize sync(2) against cgroup writeback membership switches 2019-01-22 14:39:38 -07:00
fsopen.c vfs: syscall: Add fspick() to select a superblock for reconfiguration 2019-03-20 18:49:06 -04:00
inode.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:50:27 -07:00
internal.h Merge branch 'work.mount-syscalls' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:17:51 -07:00
io_uring.c io_uring: use cpu_online() to check p->sq_thread_cpu instead of cpu_possible() 2019-05-07 08:41:26 -06:00
ioctl.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
iomap.c for-5.2/block-20190507 2019-05-07 18:14:36 -07:00
Kconfig unicode: introduce UTF-8 character database 2019-04-25 13:38:44 -04:00
Kconfig.binfmt
libfs.c Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2019-05-07 20:50:27 -07:00
locks.c Wimplicit-fallthrough patches for 5.2-rc1 2019-05-07 12:48:10 -07:00
Makefile Add as a feature case-insensitive directories (the casefold feature) 2019-05-07 21:12:44 -07:00
mbcache.c
mount.h saner handling of temporary namespaces 2019-01-30 17:44:07 -05:00
mpage.c block: remove the i argument to bio_for_each_segment_all 2019-04-30 09:26:13 -06:00
namei.c Clean up fscrypt's dcache revalidation support, and other 2019-05-07 21:28:04 -07:00
namespace.c vfs: syscall: Add fsmount() to create a mount for a superblock 2019-03-20 18:49:06 -04:00
no-block.c
nsfs.c nsfs: unobfuscate 2019-04-09 19:20:57 -04:00
open.c vfs: pass ppos=NULL to .read()/.write() of FMODE_STREAM files 2019-05-06 17:46:52 +03:00
pipe.c Merge branch 'page-refs' (page ref overflow) 2019-04-14 15:09:40 -07:00
pnode.c separate copying and locking mount tree on cross-userns copies 2019-01-30 17:14:50 -05:00
pnode.h separate copying and locking mount tree on cross-userns copies 2019-01-30 17:14:50 -05:00
posix_acl.c
proc_namespace.c
read_write.c vfs: pass ppos=NULL to .read()/.write() of FMODE_STREAM files 2019-05-06 17:46:52 +03:00
readdir.c Remove 'type' argument from access_ok() function 2019-01-03 18:57:57 -08:00
select.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
seq_file.c fs: mark expected switch fall-throughs 2019-04-08 18:21:02 -05:00
signalfd.c fs: mark expected switch fall-throughs 2019-04-08 18:21:02 -05:00
splice.c There tracing fixes: 2019-04-26 11:09:55 -07:00
stack.c block: remove CONFIG_LBDAF 2019-04-06 10:48:35 -06:00
stat.c fs: move generic stat response attr handling to vfs_getattr_nosec 2019-02-01 01:55:45 -05:00
statfs.c vfs: add vfs_get_fsid() helper 2019-02-07 16:38:35 +01:00
super.c [fix] get rid of checking for absent device name in vfs_get_tree() 2019-04-28 21:34:21 -04:00
sync.c fs: add sync_file_range() helper 2019-05-02 14:08:53 -06:00
timerfd.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
userfaultfd.c coredump: fix race condition between mmget_not_zero()/get_task_mm() and core dumping 2019-04-19 09:46:05 -07:00
utimes.c y2038: syscalls: rename y2038 compat syscalls 2019-02-07 00:13:27 +01:00
xattr.c