Failed in read the HW register is very serious for igb/igc driver,
as its hw_addr will be set to NULL and cause the adapter be seen as
"REMOVED".
We saw the error only a few times in the MTBF test for suspend/resume,
but can hardly get any useful info to debug.
Adding WARN() so that we can get the necessary information about
where and how it happens, and use it for root causing and fixing
this "PCIe link lost issue"
This affects igb, igc.
Signed-off-by: Feng Tang <feng.tang@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Acked-by: Sasha Neftin <sasha.neftin@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
In case of errors, predicate_parse() goes to the out_free label
to free memory and to return an error code.
However, predicate_parse() does not free the predicates of the
temporary prog_stack array, thence leaking them.
Link: http://lkml.kernel.org/r/20190528154338.29976-1-tomasbortoli@gmail.com
Cc: stable@vger.kernel.org
Fixes: 80765597bc587 ("tracing: Rewrite filter logic to be simpler and faster")
Reported-by: syzbot+6b8e0fb820e570c59e19@syzkaller.appspotmail.com
Signed-off-by: Tomas Bortoli <tomasbortoli@gmail.com>
[ Added protection around freeing prog_stack[i].pred ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
The keygen extracted fields are used as input for the hash that
determines the incoming frames distribution. Adding IPSEC SPI so
different IPSEC flows can be distributed to different CPUs.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make sure only the portals for the online CPUs are used.
Without this change, there are issues when someone boots with
maxcpus=n, with n < actual number of cores available as frames
either received or corresponding to the transmit confirmation
path would be offered for dequeue to the offline CPU portals,
getting lost.
Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Make sure we don't use an out-of-bound index for the per-port RSS
context array.
As of today, the global context creation in mvpp22_rss_context_create
will prevent us from reaching this case, but we should still make sure
we are using a sane value anyway.
Reported-by: kbuild test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix below issues in err code path of probe:
1. we don't need to unregister_netdev() because the netdev isn't
registered.
2. when register_netdev() fails, we also need to destroy bm pool for
HWBM case.
Fixes: dc35a10f68d3 ("net: mvneta: bm: add support for hardware buffer management")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If the subdriver defers probe, do not show an error message. It's
perfectly fine for this error to occur since the driver will get another
chance to probe after some time and will usually succeed after all of
the resources that it requires have been registered.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
When syncing the log, the final phase of a fsync operation, we need to
either create a log root's item or update the existing item in the log
tree of log roots, and that depends on the current value of the log
root's log_transid - if it's 1 we need to create the log root item,
otherwise it must exist already and we update it. Since there is no
synchronization between updating the log_transid and checking it for
deciding whether the log root's item needs to be created or updated, we
end up with a tiny race window that results in attempts to update the
item to fail because the item was not yet created:
CPU 1 CPU 2
btrfs_sync_log()
lock root->log_mutex
set log root's log_transid to 1
unlock root->log_mutex
btrfs_sync_log()
lock root->log_mutex
sets log root's
log_transid to 2
unlock root->log_mutex
update_log_root()
sees log root's log_transid
with a value of 2
calls btrfs_update_root(),
which fails with -EUCLEAN
and causes transaction abort
Until recently the race lead to a BUG_ON at btrfs_update_root(), but after
the recent commit 7ac1e464c4d47 ("btrfs: Don't panic when we can't find a
root key") we just abort the current transaction.
A sample trace of the BUG_ON() on a SLE12 kernel:
------------[ cut here ]------------
kernel BUG at ../fs/btrfs/root-tree.c:157!
Oops: Exception in kernel mode, sig: 5 [#1]
SMP NR_CPUS=2048 NUMA pSeries
(...)
Supported: Yes, External
CPU: 78 PID: 76303 Comm: rtas_errd Tainted: G X 4.4.156-94.57-default #1
task: c00000ffa906d010 ti: c00000ff42b08000 task.ti: c00000ff42b08000
NIP: d000000036ae5cdc LR: d000000036ae5cd8 CTR: 0000000000000000
REGS: c00000ff42b0b860 TRAP: 0700 Tainted: G X (4.4.156-94.57-default)
MSR: 8000000002029033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 22444484 XER: 20000000
CFAR: d000000036aba66c SOFTE: 1
GPR00: d000000036ae5cd8 c00000ff42b0bae0 d000000036bda220 0000000000000054
GPR04: 0000000000000001 0000000000000000 c00007ffff8d37c8 0000000000000000
GPR08: c000000000e19c00 0000000000000000 0000000000000000 3736343438312079
GPR12: 3930373337303434 c000000007a3a800 00000000007fffff 0000000000000023
GPR16: c00000ffa9d26028 c00000ffa9d261f8 0000000000000010 c00000ffa9d2ab28
GPR20: c00000ff42b0bc48 0000000000000001 c00000ff9f0d9888 0000000000000001
GPR24: c00000ffa9d26000 c00000ffa9d261e8 c00000ffa9d2a800 c00000ff9f0d9888
GPR28: c00000ffa9d26028 c00000ffa9d2aa98 0000000000000001 c00000ffa98f5b20
NIP [d000000036ae5cdc] btrfs_update_root+0x25c/0x4e0 [btrfs]
LR [d000000036ae5cd8] btrfs_update_root+0x258/0x4e0 [btrfs]
Call Trace:
[c00000ff42b0bae0] [d000000036ae5cd8] btrfs_update_root+0x258/0x4e0 [btrfs] (unreliable)
[c00000ff42b0bba0] [d000000036b53610] btrfs_sync_log+0x2d0/0xc60 [btrfs]
[c00000ff42b0bce0] [d000000036b1785c] btrfs_sync_file+0x44c/0x4e0 [btrfs]
[c00000ff42b0bd80] [c00000000032e300] vfs_fsync_range+0x70/0x120
[c00000ff42b0bdd0] [c00000000032e44c] do_fsync+0x5c/0xb0
[c00000ff42b0be10] [c00000000032e8dc] SyS_fdatasync+0x2c/0x40
[c00000ff42b0be30] [c000000000009488] system_call+0x3c/0x100
Instruction dump:
7f43d378 4bffebb9 60000000 88d90008 3d220000 e8b90000 3b390009 e87a01f0
e8898e08 e8f90000 4bfd48e5 60000000 <0fe00000> e95b0060 39200004 394a0ea0
---[ end trace 8f2dc8f919cabab8 ]---
So fix this by doing the check of log_transid and updating or creating the
log root's item while holding the root's log_mutex.
Fixes: 7237f1833601d ("Btrfs: fix tree logs parallel sync")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When replaying a log that contains a new file or directory name that needs
to be added to its parent directory, we end up updating the mtime and the
ctime of the parent directory to the current time after we have set their
values to the correct ones (set at fsync time), efectivelly losing them.
Sample reproducer:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ mkdir /mnt/dir
$ touch /mnt/dir/file
# fsync of the directory is optional, not needed
$ xfs_io -c fsync /mnt/dir
$ xfs_io -c fsync /mnt/dir/file
$ stat -c %Y /mnt/dir
1557856079
<power failure>
$ sleep 3
$ mount /dev/sdb /mnt
$ stat -c %Y /mnt/dir
1557856082
--> should have been 1557856079, the mtime is updated to the current
time when replaying the log
Fix this by not updating the mtime and ctime to the current time at
btrfs_add_link() when we are replaying a log tree.
This could be triggered by my recent fsync fuzz tester for fstests, for
which an fstests patch exists titled "fstests: generic, fsync fuzz tester
with fsstress".
Fixes: e02119d5a7b43 ("Btrfs: Add a write ahead tree log to optimize synchronous operations")
CC: stable@vger.kernel.org # 4.4+
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
While logging an inode we follow its ancestors and for each one we mark
it as logged in the current transaction, even if we have not logged it.
As a consequence if we change an attribute of an ancestor, such as the
UID or GID for example, and then explicitly fsync it, we end up not
logging the inode at all despite returning success to user space, which
results in the attribute being lost if a power failure happens after
the fsync.
Sample reproducer:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ mkdir /mnt/dir
$ chown 6007:6007 /mnt/dir
$ sync
$ chown 9003:9003 /mnt/dir
$ touch /mnt/dir/file
$ xfs_io -c fsync /mnt/dir/file
# fsync our directory after fsync'ing the new file, should persist the
# new values for the uid and gid.
$ xfs_io -c fsync /mnt/dir
<power failure>
$ mount /dev/sdb /mnt
$ stat -c %u:%g /mnt/dir
6007:6007
--> should be 9003:9003, the uid and gid were not persisted, despite
the explicit fsync on the directory prior to the power failure
Fix this by not updating the logged_trans field of ancestor inodes when
logging an inode, since we have not logged them. Let only future calls to
btrfs_log_inode() to mark inodes as logged.
This could be triggered by my recent fsync fuzz tester for fstests, for
which an fstests patch exists titled "fstests: generic, fsync fuzz tester
with fsstress".
Fixes: 12fcfd22fe5b ("Btrfs: tree logging unlink/rename fixes")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
When mounting a fs with reloc tree and has qgroup enabled, it can cause
NULL pointer dereference at mount time:
BUG: kernel NULL pointer dereference, address: 00000000000000a8
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
RIP: 0010:btrfs_qgroup_add_swapped_blocks+0x186/0x300 [btrfs]
Call Trace:
replace_path.isra.23+0x685/0x900 [btrfs]
merge_reloc_root+0x26e/0x5f0 [btrfs]
merge_reloc_roots+0x10a/0x1a0 [btrfs]
btrfs_recover_relocation+0x3cd/0x420 [btrfs]
open_ctree+0x1bc8/0x1ed0 [btrfs]
btrfs_mount_root+0x544/0x680 [btrfs]
legacy_get_tree+0x34/0x60
vfs_get_tree+0x2d/0xf0
fc_mount+0x12/0x40
vfs_kern_mount.part.12+0x61/0xa0
vfs_kern_mount+0x13/0x20
btrfs_mount+0x16f/0x860 [btrfs]
legacy_get_tree+0x34/0x60
vfs_get_tree+0x2d/0xf0
do_mount+0x81f/0xac0
ksys_mount+0xbf/0xe0
__x64_sys_mount+0x25/0x30
do_syscall_64+0x65/0x240
entry_SYSCALL_64_after_hwframe+0x49/0xbe
[CAUSE]
In btrfs_recover_relocation(), we don't have enough info to determine
which block group we're relocating, but only to merge existing reloc
trees.
Thus in btrfs_recover_relocation(), rc->block_group is NULL.
btrfs_qgroup_add_swapped_blocks() hasn't taken this into consideration,
and causes a NULL pointer dereference.
The bug is introduced by commit 3d0174f78e72 ("btrfs: qgroup: Only trace
data extents in leaves if we're relocating data block group"), and
later qgroup refactoring still keeps this optimization.
[FIX]
Thankfully in the context of btrfs_recover_relocation(), there is no
other progress can modify tree blocks, thus those swapped tree blocks
pair will never affect qgroup numbers, no matter whatever we set for
block->trace_leaf.
So we only need to check if @bg is NULL before accessing @bg->flags.
Reported-by: Juan Erbes <jerbes@gmail.com>
Link: https://bugzilla.opensuse.org/show_bug.cgi?id=1134806
Fixes: 3d0174f78e72 ("btrfs: qgroup: Only trace data extents in leaves if we're relocating data block group")
CC: stable@vger.kernel.org # 4.20+
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
When a fs has orphan reloc tree along with unfinished balance:
...
item 16 key (TREE_RELOC ROOT_ITEM FS_TREE) itemoff 12090 itemsize 439
generation 12 root_dirid 256 bytenr 300400640 level 1 refs 0 <<<
lastsnap 8 byte_limit 0 bytes_used 1359872 flags 0x0(none)
uuid 7c48d938-33a3-4aae-ab19-6e5c9d406e46
item 17 key (BALANCE TEMPORARY_ITEM 0) itemoff 11642 itemsize 448
temporary item objectid BALANCE offset 0
balance status flags 14
Then at mount time, we can hit the following kernel BUG_ON():
BTRFS info (device dm-3): relocating block group 298844160 flags metadata|dup
------------[ cut here ]------------
kernel BUG at fs/btrfs/relocation.c:1413!
invalid opcode: 0000 [#1] PREEMPT SMP NOPTI
CPU: 1 PID: 897 Comm: btrfs-balance Tainted: G O 5.2.0-rc1-custom #15
RIP: 0010:create_reloc_root+0x1eb/0x200 [btrfs]
Call Trace:
btrfs_init_reloc_root+0x96/0xb0 [btrfs]
record_root_in_trans+0xb2/0xe0 [btrfs]
btrfs_record_root_in_trans+0x55/0x70 [btrfs]
select_reloc_root+0x7e/0x230 [btrfs]
do_relocation+0xc4/0x620 [btrfs]
relocate_tree_blocks+0x592/0x6a0 [btrfs]
relocate_block_group+0x47b/0x5d0 [btrfs]
btrfs_relocate_block_group+0x183/0x2f0 [btrfs]
btrfs_relocate_chunk+0x4e/0xe0 [btrfs]
btrfs_balance+0x864/0xfa0 [btrfs]
balance_kthread+0x3b/0x50 [btrfs]
kthread+0x123/0x140
ret_from_fork+0x27/0x50
[CAUSE]
In btrfs, reloc trees are used to record swapped tree blocks during
balance.
Reloc tree either get merged (replace old tree blocks of its parent
subvolume) in next transaction if its ref is 1 (fresh).
Or is already merged and will be cleaned up if its ref is 0 (orphan).
After commit d2311e698578 ("btrfs: relocation: Delay reloc tree deletion
after merge_reloc_roots"), reloc tree cleanup is delayed until one block
group is balanced.
Since fresh reloc roots are recorded during merge, as long as there
is no power loss, those orphan reloc roots converted from fresh ones are
handled without problem.
However when power loss happens, orphan reloc roots can be recorded
on-disk, thus at next mount time, we will have orphan reloc roots from
on-disk data directly, and ignored by clean_dirty_subvols() routine.
Then when background balance starts to balance another block group, and
needs to create new reloc root for the same root, btrfs_insert_item()
returns -EEXIST, and trigger that BUG_ON().
[FIX]
For orphan reloc roots, also queue them to rc->dirty_subvol_roots, so
all reloc roots no matter orphan or not, can be cleaned up properly and
avoid above BUG_ON().
And to cooperate with above change, clean_dirty_subvols() will check if
the queued root is a reloc root or a subvol root.
For a subvol root, do the old work, and for a orphan reloc root, clean it
up.
Fixes: d2311e698578 ("btrfs: relocation: Delay reloc tree deletion after merge_reloc_roots")
CC: stable@vger.kernel.org # 5.1
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When doing an incremental send we can now issue clone operations with a
source range that ends at the source's file eof and with a destination
range that ends at an offset smaller then the destination's file eof.
If the eof of the source file is not aligned to the sector size of the
filesystem, the receiver will get a -EINVAL error when trying to do the
operation or, on older kernels, silently corrupt the destination file.
The corruption happens on kernels without commit ac765f83f1397646
("Btrfs: fix data corruption due to cloning of eof block"), while the
failure to clone happens on kernels with that commit.
Example reproducer:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt/sdb
$ xfs_io -f -c "pwrite -S 0xb1 0 2M" /mnt/sdb/foo
$ xfs_io -f -c "pwrite -S 0xc7 0 2M" /mnt/sdb/bar
$ xfs_io -f -c "pwrite -S 0x4d 0 2M" /mnt/sdb/baz
$ xfs_io -f -c "pwrite -S 0xe2 0 2M" /mnt/sdb/zoo
$ btrfs subvolume snapshot -r /mnt/sdb /mnt/sdb/base
$ btrfs send -f /tmp/base.send /mnt/sdb/base
$ xfs_io -c "reflink /mnt/sdb/bar 1560K 500K 100K" /mnt/sdb/bar
$ xfs_io -c "reflink /mnt/sdb/bar 1560K 0 100K" /mnt/sdb/zoo
$ xfs_io -c "truncate 550K" /mnt/sdb/bar
$ btrfs subvolume snapshot -r /mnt/sdb /mnt/sdb/incr
$ btrfs send -f /tmp/incr.send -p /mnt/sdb/base /mnt/sdb/incr
$ mkfs.btrfs -f /dev/sdc
$ mount /dev/sdc /mnt/sdc
$ btrfs receive -f /tmp/base.send /mnt/sdc
$ btrfs receive -vv -f /tmp/incr.send /mnt/sdc
(...)
truncate bar size=563200
utimes bar
clone zoo - source=bar source offset=512000 offset=0 length=51200
ERROR: failed to clone extents to zoo
Invalid argument
The failure happens because the clone source range ends at the eof of file
bar, 563200, which is not aligned to the filesystems sector size (4Kb in
this case), and the destination range ends at offset 0 + 51200, which is
less then the size of the file zoo (2Mb).
So fix this by detecting such case and instead of issuing a clone
operation for the whole range, do a clone operation for smaller range
that is sector size aligned followed by a write operation for the block
containing the eof. Here we will always be pessimistic and assume the
destination filesystem of the send stream has the largest possible sector
size (64Kb), since we have no way of determining it.
This fixes a recent regression introduced in kernel 5.2-rc1.
Fixes: 040ee6120cb6706 ("Btrfs: send, improve clone range")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When using the no-holes feature, if we have a file with prealloc extents
with a start offset beyond the file's eof, doing an incremental send can
cause corruption of the file due to incorrect hole detection. Such case
requires that the prealloc extent(s) exist in both the parent and send
snapshots, and that a hole is punched into the file that covers all its
extents that do not cross the eof boundary.
Example reproducer:
$ mkfs.btrfs -f -O no-holes /dev/sdb
$ mount /dev/sdb /mnt/sdb
$ xfs_io -f -c "pwrite -S 0xab 0 500K" /mnt/sdb/foobar
$ xfs_io -c "falloc -k 1200K 800K" /mnt/sdb/foobar
$ btrfs subvolume snapshot -r /mnt/sdb /mnt/sdb/base
$ btrfs send -f /tmp/base.snap /mnt/sdb/base
$ xfs_io -c "fpunch 0 500K" /mnt/sdb/foobar
$ btrfs subvolume snapshot -r /mnt/sdb /mnt/sdb/incr
$ btrfs send -p /mnt/sdb/base -f /tmp/incr.snap /mnt/sdb/incr
$ md5sum /mnt/sdb/incr/foobar
816df6f64deba63b029ca19d880ee10a /mnt/sdb/incr/foobar
$ mkfs.btrfs -f /dev/sdc
$ mount /dev/sdc /mnt/sdc
$ btrfs receive -f /tmp/base.snap /mnt/sdc
$ btrfs receive -f /tmp/incr.snap /mnt/sdc
$ md5sum /mnt/sdc/incr/foobar
cf2ef71f4a9e90c2f6013ba3b2257ed2 /mnt/sdc/incr/foobar
--> Different checksum, because the prealloc extent beyond the
file's eof confused the hole detection code and it assumed
a hole starting at offset 0 and ending at the offset of the
prealloc extent (1200Kb) instead of ending at the offset
500Kb (the file's size).
Fix this by ensuring we never cross the file's size when issuing the
write operations for a hole.
Fixes: 16e7549f045d33 ("Btrfs: incompatible format change to remove hole extents")
CC: stable@vger.kernel.org # 3.14+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Recent FITRIM work, namely bbbf7243d62d ("btrfs: combine device update
operations during transaction commit") combined the way certain
operations are recoded in a transaction. As a result an ASSERT was added
in dev_replace_finish to ensure the new code works correctly.
Unfortunately I got reports that it's possible to trigger the assert,
meaning that during a device replace it's possible to have an unfinished
chunk allocation on the source device.
This is supposed to be prevented by the fact that a transaction is
committed before finishing the replace oepration and alter acquiring the
chunk mutex. This is not sufficient since by the time the transaction is
committed and the chunk mutex acquired it's possible to allocate a chunk
depending on the workload being executed on the replaced device. This
bug has been present ever since device replace was introduced but there
was never code which checks for it.
The correct way to fix is to ensure that there is no pending device
modification operation when the chunk mutex is acquire and if there is
repeat transaction commit. Unfortunately it's not possible to just
exclude the source device from btrfs_fs_devices::dev_alloc_list since
this causes ENOSPC to be hit in transaction commit.
Fixing that in another way would need to add special cases to handle the
last writes and forbid new ones. The looped transaction fix is more
obvious, and can be easily backported. The runtime of dev-replace is
long so there's no noticeable delay caused by that.
Reported-by: David Sterba <dsterba@suse.com>
Fixes: 391cd9df81ac ("Btrfs: fix unprotected alloc list insertion during the finishing procedure of replace")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
- Interrupt clearing fix for the Intel pin controllers affecting
touchpads on some laptops.
- Compile Kconfig fix for the STMFX expander pin controller.
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Merge tag 'pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull pin control fixes from Linus Walleij:
"The commits that stand out are the Intel fixes that arrived during the
merge window and I got relayed by pull request from Andy.
Apart from that a minor Kconfig noise.
- Interrupt clearing fix for the Intel pin controllers affecting
touchpads on some laptops.
- Compile Kconfig fix for the STMFX expander pin controller"
* tag 'pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl: stmfx: Fix compile issue when CONFIG_OF_GPIO is not defined
pinctrl: intel: Clear interrupt status in mask/unmask callback
pinctrl: intel: Use GENMASK() consistently
Commit 1cf24a2cc3fd
("arm64/module: deal with ambiguity in PRELxx relocation ranges")
updated the overflow checking logic in the relocation handling code to
ensure that PREL16/32 relocations don't overflow signed quantities.
However, the same code path is used for absolute relocations, where the
interpretation is the opposite: the only current use case for absolute
relocations operating on non-native word size quantities is the CRC32
handling in the CONFIG_MODVERSIONS code, and these CRCs are unsigned
32-bit quantities, which are now being rejected by the module loader
if bit 31 happens to be set.
So let's use different ranges for quanties subject to absolute vs.
relative relocations:
- ABS16/32 relocations should be in the range [0, Uxx_MAX)
- PREL16/32 relocations should be in the range [Sxx_MIN, Sxx_MAX)
- otherwise, print an error since no other 16 or 32 bit wide data
relocations are currently supported.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Following commit 4378a7d4be30 ("arm64: implement syscall wrappers"), the
syscall function names gained the '__arm64_' prefix. Ensure that we
have the correct #define for redirecting a default syscall through a
wrapper.
Fixes: 4378a7d4be30 ("arm64: implement syscall wrappers")
Cc: <stable@vger.kernel.org> # 4.19.x-
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
The current code performs the cancel of a delayed work at the late
stage of disconnection procedure, which may lead to the access to the
already cleared state.
This patch assures to call cancel_delayed_work_sync() at the beginning
of the disconnection procedure for avoiding that race. The delayed
work object is now assigned in the common line6 object instead of its
derivative, so that we can call cancel_delayed_work_sync().
Along with the change, the startup function is called via the new
callback instead. This will make it easier to port other LINE6
drivers to use the delayed work for startup in later patches.
Reported-by: syzbot+5255458d5e0a2b10bbb9@syzkaller.appspotmail.com
Fixes: 7f84ff68be05 ("ALSA: line6: toneport: Fix broken usage of timer for delayed execution")
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
In the vfs_statx() context, during path lookup, the dentry gets
added to sd->s_dentry via configfs_attach_attr(). In the end,
vfs_statx() kills the dentry by calling path_put(), which invokes
configfs_d_iput(). Ideally, this dentry must be removed from
sd->s_dentry but it doesn't if the sd->s_count >= 3. As a result,
sd->s_dentry is holding reference to a stale dentry pointer whose
memory is already freed up. This results in use-after-free issue,
when this stale sd->s_dentry is accessed later in
configfs_readdir() path.
This issue can be easily reproduced, by running the LTP test case -
sh fs_racer_file_list.sh /config
(https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/fs/racer/fs_racer_file_list.sh)
Fixes: 76ae281f6307 ('configfs: fix race between dentry put and lookup')
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
We observed the same issue as reported by commit a8d7bde23e7130686b7662
("ALSA: hda - Force polling mode on CFL for fixing codec communication")
We don't have a better solution. So apply the same workaround to CNL.
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Igor Russkikh says:
====================
net: aquantia: various fixes May, 2019
Here is a set of various bug fixes found on recent verification stage.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Thats a known quirk in windows tcp stack it can produce 0xffff checksum.
Thats incorrect but it is.
Atlantic HW with LRO enabled handles that incorrectly and changes csum to
0xfffe - but indicates that csum is invalid. This causes driver to pass
packet to linux networking stack with CSUM_NONE, stack eventually drops
the packet.
There is a quirk in atlantic HW to enable correct processing of
0xffff incorrect csum. Enable it.
The visible bug is that windows link partner with software generated csums
caused TCP connection to be unstable since all packets that csum value
are dropped.
Reported-by: Dmitry Bezrukov <dmitry.bezrukov@aquantia.com>
Signed-off-by: Nikita Danilov <ndanilov@aquantia.com>
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Driver stops producing skbs on ring if a packet with FCS error
was coalesced into LRO session. Ring gets hang forever.
Thats a logical error in driver processing descriptors:
When rx_stat indicates MAC Error, next pointer and eop flags
are not filled. This confuses driver so it waits for descriptor 0
to be filled by HW.
Solution is fill next pointer and eop flag even for packets with FCS error.
Fixes: bab6de8fd180b ("net: ethernet: aquantia: Atlantic A0 and B0 specific functions.")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Atlantic hardware does not aggregate nor breaks LRO sessions
with bad csum packets. This means driver should take care of that.
If in LRO session there is a non-first descriptor with invalid
checksum (L2/L3/L4), the driver must account this information
in csum application logic.
Fixes: 018423e90bee8 ("net: ethernet: aquantia: Add ring support code")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: Dmitry Bogdanov <dmitry.bogdanov@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In case no other traffic happening on the ring, full tx cleanup
may not be completed. That may cause socket buffer to overflow
and tx traffic to stuck until next activity on the ring happens.
This is due to logic error in budget variable decrementor.
Variable is compared with zero, and then post decremented,
causing it to become MAX_INT. Solution is remove decrementor
from the `for` statement and rewrite it in a clear way.
Fixes: b647d3980948e ("net: aquantia: Add tx clean budget and valid budget handling logic")
Signed-off-by: Igor Russkikh <igor.russkikh@aquantia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix blow sparse warning introduced by a previous patch.
- restricted __le32 degrades to integer
- restricted __le16 degrades to integer
Fixes: d39823121911 ("enetc: add hardware timestamping support")
Signed-off-by: Yangbo Lu <yangbo.lu@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix a laggish ELAN touchpad responsiveness due to an odd interrupt masking.
The following is an automated git shortlog grouped by driver:
intel:
- Clear interrupt status in mask/unmask callback
- Use GENMASK() consistently
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Merge tag 'intel-pinctrl-v5.2-2' of git://git.kernel.org/pub/scm/linux/kernel/git/pinctrl/intel into fixes
intel-pinctrl for v5.2-2
Fix a laggish ELAN touchpad responsiveness due to an odd interrupt masking.
The following is an automated git shortlog grouped by driver:
intel:
- Clear interrupt status in mask/unmask callback
- Use GENMASK() consistently
RTL_GIGA_MAC_VER_01 is RTL8169, the ancestor of the chip family.
It didn't have an internal PHY and I've never seen it in the wild.
What isn't there doesn't need to be maintained, so let's remove
support for it.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Certain parts of the PHY initialization are the same for sub versions
1 and 2 of RTL8168d. So let's factor this out to simplify the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Heiner Kallweit says:
====================
r8169: small improvements
Series with small improvements.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Use the appropriate enum type for member mac_version. And don't assign
a fixed value to RTL_GIGA_MAC_NONE, there's no benefit in it.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rtl_hw_init_8168ep() can be removed, this simplifies the code.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Fix sparse warning:
drivers/net/ethernet/chelsio/cxgb4/t4_hw.c:6216:14:
warning: symbol 't4_get_tp_e2c_map' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
I was really surprised that the IPv6 mtu exception followed by redirect
test was passing as nothing about the code suggests it should. The problem
is actually with the logic in the test script.
Fix the test cases as follows:
1. add debug function to dump the initial and redirect gateway addresses
for ipv6. This is shown only in verbose mode. It helps verify the
output of 'route get'.
2. fix the check_exception logic for the reset case to make sure that
for IPv4 neither mtu nor redirect appears in the 'route get' output.
For IPv6, make sure mtu is not present and the gateway is the initial
R1 lladdr.
3. fix the reset logic by using a function to delete the routes added by
initial_route_*. This format works better for the nexthop version of
the tests.
While improving the test cases, go ahead and ensure that forwarding is
disabled since IPv6 redirect requires it.
Also, runs with kernel debugging enabled sometimes show a failure with
one of the ipv4 tests, so spread the pings over longer time interval.
The end result is that 2 tests now show failures:
TEST: IPv6: mtu exception plus redirect [FAIL]
and the VRF version.
This is a bug in the IPv6 logic that will need to be fixed
separately. Redirect followed by MTU works because __ip6_rt_update_pmtu
hits the 'if (!rt6_cache_allowed_for_pmtu(rt6))' path and updates the
mtu on the exception rt6_info.
MTU followed by redirect does not have this logic. rt6_do_redirect
creates a new exception and then rt6_insert_exception removes the old
one which has the MTU exception.
Fixes: ec8105352869 ("selftests: Add redirect tests")
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The pointer n is being assigned a value however this value is
never read in the code block and the end of the code block
continues to the next loop iteration. Clean up the code by
removing the redundant assignment.
Fixes: 1bff1a0c9bbda ("ipv4: Add function to send route updates")
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
PHY drivers don't have to and shouldn't fiddle with phylib internals.
Most of the code in bcm87xx_config_init() can be removed because
phylib takes care.
In addition I replaced usage of PHY_10GBIT_FEC_FEATURES with an
implementation of the get_features callback. PHY_10GBIT_FEC_FEATURES
is used by this driver only and it's questionable whether there
will be any other PHY supporting this mode only. Having said that
in one of the next kernel versions we may decide to remove it.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Building with Clang reports the redundant use of MODULE_DEVICE_TABLE():
drivers/net/ethernet/dec/tulip/de4x5.c:2110:1: error: redefinition of '__mod_eisa__de4x5_eisa_ids_device_table'
MODULE_DEVICE_TABLE(eisa, de4x5_eisa_ids);
^
./include/linux/module.h:229:21: note: expanded from macro 'MODULE_DEVICE_TABLE'
extern typeof(name) __mod_##type##__##name##_device_table \
^
<scratch space>:90:1: note: expanded from here
__mod_eisa__de4x5_eisa_ids_device_table
^
drivers/net/ethernet/dec/tulip/de4x5.c:2100:1: note: previous definition is here
MODULE_DEVICE_TABLE(eisa, de4x5_eisa_ids);
^
./include/linux/module.h:229:21: note: expanded from macro 'MODULE_DEVICE_TABLE'
extern typeof(name) __mod_##type##__##name##_device_table \
^
<scratch space>:85:1: note: expanded from here
__mod_eisa__de4x5_eisa_ids_device_table
^
This drops the one further from the table definition to match the common
use of MODULE_DEVICE_TABLE().
Fixes: 07563c711fbc ("EISA bus MODALIAS attributes support")
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski says:
====================
net/tls: two fixes for rx_list pre-handling
tls_sw_recvmsg() had been modified to cater better to async decrypt.
Partially read records now live on the rx_list. Data is copied from
this list before the old do {} while loop, and the not included
correctly in deciding whether to sleep or not and lowat threshold
handling. These modifications, unfortunately, added some bugs.
First patch fixes lowat - we need to calculate the threshold early
and make sure all copied data is compared to the threshold, not just
the freshly decrypted data.
Third patch fixes sleep - if data is picked up from rx_list and
no flags are set, we should not put the process to sleep, but
rather return the partial read.
Patches 2 and 4 add test cases for these bugs, both will cause
a sleep and test timeout before the fix.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add a test which sends 15 bytes of data, and then tries
to read 10 byes twice. Previously the second read would
sleep indifinitely, since the record was already decrypted
and there is only 5 bytes left, not full 10.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When tls_sw_recvmsg() partially copies a record it pops that
record from ctx->recv_pkt and places it on rx_list.
Next iteration of tls_sw_recvmsg() reads from rx_list via
process_rx_list() before it enters the decryption loop.
If there is no more records to be read tls_wait_data()
will put the process on the wait queue and got to sleep.
This is incorrect, because some data was already copied
in process_rx_list().
In case of RPC connections process may never get woken up,
because peer also simply blocks in read().
I think this may also fix a similar issue when BPF is at
play, because after __tcp_bpf_recvmsg() returns some data
we subtract it from len and use continue to restart the
loop, but len could have just reached 0, so again we'd
sleep unnecessarily. That's added by:
commit d3b18ad31f93 ("tls: add bpf support to sk_msg handling")
Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records")
Reported-by: David Beckett <david.beckett@netronome.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Tested-by: David Beckett <david.beckett@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Set SO_RCVLOWAT and test it gets respected when gathering
data from multiple records.
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If some of the data came from the previous record, i.e. from
the rx_list it had already been decrypted, so it's not counted
towards the "decrypted" variable, but the "copied" variable.
Take that into account when checking lowat.
When calculating lowat target we need to pass the original len.
E.g. if lowat is at 80, len is 100 and we had 30 bytes on rx_list
target would currently be incorrectly calculated as 70, even though
we only need 50 more bytes to make up the 80.
Fixes: 692d7b5d1f91 ("tls: Fix recvmsg() to be able to peek across multiple records")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Tested-by: David Beckett <david.beckett@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet says:
====================
inet: frags: avoid possible races at netns dismantle
This patch series fixes a race happening on netns dismantle with
frag queues. While rhashtable_free_and_destroy() is running,
concurrent timers might run inet_frag_kill() and attempt
rhashtable_remove_fast() calls. This is not allowed by
rhashtable logic.
Since I do not want to add expensive synchronize_rcu() calls
in the netns dismantle path, I had to no longer inline
netns_frags structures, but dynamically allocate them.
The ten first patches make this preparation, so that
the last patch clearly shows the fix.
As this patch series is not exactly trivial, I chose to
target 5.3. We will backport it once soaked a bit.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
syszbot found an interesting use-after-free [1] happening
while IPv4 fragment rhashtable was destroyed at netns dismantle.
While no insertions can possibly happen at the time a dismantling
netns is destroying this rhashtable, timers can still fire and
attempt to remove elements from this rhashtable.
This is forbidden, since rhashtable_free_and_destroy() has
no synchronization against concurrent inserts and deletes.
Add a new fqdir->dead flag so that timers do not attempt
a rhashtable_remove_fast() operation.
We also have to respect an RCU grace period before starting
the rhashtable_free_and_destroy() from process context,
thus we use rcu_work infrastructure.
This is a refinement of a prior rough attempt to fix this bug :
https://marc.info/?l=linux-netdev&m=153845936820900&w=2
Since the rhashtable cleanup is now deferred to a work queue,
netns dismantles should be slightly faster.
[1]
BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:194 [inline]
BUG: KASAN: use-after-free in rhashtable_last_table+0x162/0x180 lib/rhashtable.c:212
Read of size 8 at addr ffff8880a6497b70 by task kworker/0:0/5
CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.2.0-rc1+ #2
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events rht_deferred_worker
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x172/0x1f0 lib/dump_stack.c:113
print_address_description.cold+0x7c/0x20d mm/kasan/report.c:188
__kasan_report.cold+0x1b/0x40 mm/kasan/report.c:317
kasan_report+0x12/0x20 mm/kasan/common.c:614
__asan_report_load8_noabort+0x14/0x20 mm/kasan/generic_report.c:132
__read_once_size include/linux/compiler.h:194 [inline]
rhashtable_last_table+0x162/0x180 lib/rhashtable.c:212
rht_deferred_worker+0x111/0x2030 lib/rhashtable.c:411
process_one_work+0x989/0x1790 kernel/workqueue.c:2269
worker_thread+0x98/0xe40 kernel/workqueue.c:2415
kthread+0x354/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
Allocated by task 32687:
save_stack+0x23/0x90 mm/kasan/common.c:71
set_track mm/kasan/common.c:79 [inline]
__kasan_kmalloc mm/kasan/common.c:489 [inline]
__kasan_kmalloc.constprop.0+0xcf/0xe0 mm/kasan/common.c:462
kasan_kmalloc+0x9/0x10 mm/kasan/common.c:503
__do_kmalloc_node mm/slab.c:3620 [inline]
__kmalloc_node+0x4e/0x70 mm/slab.c:3627
kmalloc_node include/linux/slab.h:590 [inline]
kvmalloc_node+0x68/0x100 mm/util.c:431
kvmalloc include/linux/mm.h:637 [inline]
kvzalloc include/linux/mm.h:645 [inline]
bucket_table_alloc+0x90/0x480 lib/rhashtable.c:178
rhashtable_init+0x3f4/0x7b0 lib/rhashtable.c:1057
inet_frags_init_net include/net/inet_frag.h:109 [inline]
ipv4_frags_init_net+0x182/0x410 net/ipv4/ip_fragment.c:683
ops_init+0xb3/0x410 net/core/net_namespace.c:130
setup_net+0x2d3/0x740 net/core/net_namespace.c:316
copy_net_ns+0x1df/0x340 net/core/net_namespace.c:439
create_new_namespaces+0x400/0x7b0 kernel/nsproxy.c:107
unshare_nsproxy_namespaces+0xc2/0x200 kernel/nsproxy.c:206
ksys_unshare+0x440/0x980 kernel/fork.c:2692
__do_sys_unshare kernel/fork.c:2760 [inline]
__se_sys_unshare kernel/fork.c:2758 [inline]
__x64_sys_unshare+0x31/0x40 kernel/fork.c:2758
do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 7:
save_stack+0x23/0x90 mm/kasan/common.c:71
set_track mm/kasan/common.c:79 [inline]
__kasan_slab_free+0x102/0x150 mm/kasan/common.c:451
kasan_slab_free+0xe/0x10 mm/kasan/common.c:459
__cache_free mm/slab.c:3432 [inline]
kfree+0xcf/0x220 mm/slab.c:3755
kvfree+0x61/0x70 mm/util.c:460
bucket_table_free+0x69/0x150 lib/rhashtable.c:108
rhashtable_free_and_destroy+0x165/0x8b0 lib/rhashtable.c:1155
inet_frags_exit_net+0x3d/0x50 net/ipv4/inet_fragment.c:152
ipv4_frags_exit_net+0x73/0x90 net/ipv4/ip_fragment.c:695
ops_exit_list.isra.0+0xaa/0x150 net/core/net_namespace.c:154
cleanup_net+0x3fb/0x960 net/core/net_namespace.c:553
process_one_work+0x989/0x1790 kernel/workqueue.c:2269
worker_thread+0x98/0xe40 kernel/workqueue.c:2415
kthread+0x354/0x420 kernel/kthread.c:255
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:352
The buggy address belongs to the object at ffff8880a6497b40
which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 48 bytes inside of
1024-byte region [ffff8880a6497b40, ffff8880a6497f40)
The buggy address belongs to the page:
page:ffffea0002992580 refcount:1 mapcount:0 mapping:ffff8880aa400ac0 index:0xffff8880a64964c0 compound_mapcount: 0
flags: 0x1fffc0000010200(slab|head)
raw: 01fffc0000010200 ffffea0002916e88 ffffea000218fe08 ffff8880aa400ac0
raw: ffff8880a64964c0 ffff8880a6496040 0000000100000005 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880a6497a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880a6497a80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc
>ffff8880a6497b00: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb
^
ffff8880a6497b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff8880a6497c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
Fixes: 648700f76b03 ("inet: frags: use rhashtables for reassembly units")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
