Pull watchdog updates from Wim Van Sebroeck:
- qcom-wdt dt-bindings improvements and additions (like MSM8994 and
MDM9615)
- mtk_wdt: Add reset_by_toprgu support
- devm_clk_get_enabled() helper changes
- Fix kmemleak in watchdog_cdev_register
- watchdog sysfs improvements
- Other fixes and small improvements
* tag 'linux-watchdog-6.3-rc1' of git://www.linux-watchdog.org/linux-watchdog: (52 commits)
watchdog: at91rm9200: Only warn once about problems in .remove()
watchdog: mt7621-wdt: avoid ralink architecture dependent code
watchdog: mt7621-wdt: avoid static global declarations
dt-bindings: watchdog: mt7621-wdt: add phandle to access system controller registers
watchdog: sbsa_wdog: Make sure the timeout programming is within the limits
dt-bindings: watchdog: qcom-wdt: add qcom,apss-wdt-sa8775p compatible
watchdog: report options in sysfs
watchdog: report fw_version in sysfs
dt-bindings: watchdog: fsl-imx: document suspend in wait mode
watchdog: imx2_wdg: suspend watchdog in WAIT mode
watchdog: pcwd_usb: Fix attempting to access uninitialized memory
dt-bindings: watchdog: qcom-wdt: merge MSM timer
dt-bindings: watchdog: qcom-wdt: allow interrupts
dt-bindings: watchdog: qcom-wdt: add qcom,kpss-wdt-mdm9615
dt-bindings: watchdog: qcom-wdt: fix list of MSM timer compatibles
dt-bindings: watchdog: qcom-wdt: do not allow fallback alone
dt-bindings: watchdog: qcom-wdt: require fallback for IPQ4019
watchdog: Fix kmemleak in watchdog_cdev_register
watchdog: Include <linux/kstrtox.h> when appropriate
watchdog: at91sam9_wdt: use devm_request_irq to avoid missing free_irq() in error path
...
Pull ceph fixes from Ilya Dryomov:
"Two small fixes from Xiubo and myself, marked for stable"
* tag 'ceph-for-6.3-rc1' of https://github.com/ceph/ceph-client:
rbd: avoid use-after-free in do_rbd_add() when rbd_dev_create() fails
ceph: update the time stamps and try to drop the suid/sgid
Pull more MIPS updates from Thomas Bogendoerfer:
"A few more cleanups and fixes"
* tag 'mips_6.3_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
MIPS: Workaround clang inline compat branch issue
mips: dts: ralink: mt7621: add phandle to system controller node for watchdog
mips: dts: ralink: mt7621: rename watchdog node from 'wdt' into 'watchdog'
mips: ralink: make SOC_MT7621 select PINCTRL
mips: remove SYS_HAS_CPU_MIPS32_R1 from RALINK
MIPS: cevt-r4k: Offset the value used to clear compare interrupt
MIPS: smp-cps: Don't rely on CP0_CMGCRBASE
MIPS: Remove DMA_PERDEV_COHERENT
Pull objtool updates from Ingo Molnar:
- Shrink 'struct instruction', to improve objtool performance & memory
footprint
- Other maximum memory usage reductions - this makes the build both
faster, and fixes kernel build OOM failures on allyesconfig and
similar configs when they try to build the final (large) vmlinux.o
- Fix ORC unwinding when a kprobe (INT3) is set on a stack-modifying
single-byte instruction (PUSH/POP or LEAVE). This requires the
extension of the ORC metadata structure with a 'signal' field
- Misc fixes & cleanups
* tag 'objtool-core-2023-03-02' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (22 commits)
objtool: Fix ORC 'signal' propagation
objtool: Remove instruction::list
x86: Fix FILL_RETURN_BUFFER
objtool: Fix overlapping alternatives
objtool: Union instruction::{call_dest,jump_table}
objtool: Remove instruction::reloc
objtool: Shrink instruction::{type,visited}
objtool: Make instruction::alts a single-linked list
objtool: Make instruction::stack_ops a single-linked list
objtool: Change arch_decode_instruction() signature
x86/entry: Fix unwinding from kprobe on PUSH/POP instruction
x86/unwind/orc: Add 'signal' field to ORC metadata
objtool: Optimize layout of struct special_alt
objtool: Optimize layout of struct symbol
objtool: Allocate multiple structures with calloc()
objtool: Make struct check_options static
objtool: Make struct entries[] static and const
objtool: Fix HOSTCC flag usage
objtool: Properly support make V=1
objtool: Install libsubcmd in build
...
Pull auxdisplay fix from Miguel Ojeda:
- hd44780: Fix potential memory leak in hd44780_remove() (Jianglei Nie)
* tag 'auxdisplay-6.3' of https://github.com/ojeda/linux:
auxdisplay: hd44780: Fix potential memory leak in hd44780_remove()
openrisc equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
nios2 equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull driver core fixes from Greg KH:
"Here is another small set of driver core patches.
They resolve some reported problems with the previous driver core
patches that are in your tree.
They solve a problem with the bus_type cleanup as reported and fixed
by Geert, and two fw_devlink changes to make debugging problems
easier.
There is one known outstanding problem with the fw_deflink changes in
your tree that is still being worked on, and it looks like a clk core
change will be submitted soon for that, probably after 6.3-rc1.
All three of these have been in linux-next with no reported problems
(only reports that they fixed problems)"
* tag 'driver-core-6.3-rc1_2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
driver core: fw_devlink: Print full path and name of fwnode
driver core: fw_devlink: Avoid spurious error message
driver core: bus: Handle early calls to bus_to_subsys()
microblaze equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
ia64 equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
sparc equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
alpha equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
parisc equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Tested-by: Helge Deller <deller@gmx.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
hexagon equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Acked-by: Brian Cain <bcain@quicinc.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
riscv equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Tested-by: Björn Töpel <bjorn@kernel.org>
Tested-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
m68k equivalent of 26178ec11e "x86: mm: consolidate VM_FAULT_RETRY handling"
If e.g. get_user() triggers a page fault and a fatal signal is caught, we might
end up with handle_mm_fault() returning VM_FAULT_RETRY and not doing anything
to page tables. In such case we must *not* return to the faulting insn -
that would repeat the entire thing without making any progress; what we need
instead is to treat that as failed (user) memory access.
Tested-by: Finn Thain <fthain@linux-m68k.org>
Tested-by: Geert Uytterhoeven <geert@linux-m68k.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Pull spi fixes from Mark Brown:
"A small set of fixes for SPI drivers, Krishna has been doing a bunch
of work on Tegra210 QuadSPI and found a bunch of issues there and
there's a couple of small fixes for other drivers too"
* tag 'spi-fix-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: tegra210-quad: Fix iterator outside loop
spi: tegra210-quad: Fix validate combined sequence
spi: tegra210-quad: set half duplex flag
spi: spi-sn-f-ospi: fix duplicate flag while assigning to mode_bits
spi: cadence-quadspi: Fix cancel the indirect read mask
Pull regulator fixes from Mark Brown:
"Two fixes here, one driver fix for incorrect error codes and a fix in
the core to use ktime_get_boottime() in order to fix accounting of the
time regulators have been powered down over suspend. ktime_get()
pauses over suspend which is not what we want"
* tag 'regulator-fix-v6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: core: Use ktime_get_boottime() to determine how long a regulator was off
regulator: max597x: Fix error return code in max597x_get_status
Miquel reported a warning in the MSI core which is triggered when
interrupts are freed via platform_msi_device_domain_free().
This code got reworked to use core functions for freeing the MSI
descriptors, but nothing took care to clear the msi_desc->irq entry, which
then triggers the warning in msi_free_msi_desc() which uses desc->irq to
validate that the descriptor has been torn down. The same issue exists in
msi_domain_populate_irqs().
Up to the point that msi_free_msi_descs() grew a warning for this case,
this went un-noticed.
Provide the counterpart of msi_domain_populate_irqs() and invoke it in
platform_msi_device_domain_free() before freeing the interrupts and MSI
descriptors and also in the error path of msi_domain_populate_irqs().
Fixes: 2f2940d168 ("genirq/msi: Remove filter from msi_free_descs_free_range()")
Reported-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/87mt4wkwnv.ffs@tglx
Recent test_kprobe_missed kprobes kunit test uncovers the following
problem. Once kprobe is triggered from another kprobe (kprobe reenter),
all future kprobes on this cpu are considered as kprobe reenter, thus
pre_handler and post_handler are not being called and kprobes are counted
as "missed".
Commit b9599798f9 ("[S390] kprobes: activation and deactivation")
introduced a simpler scheme for kprobes (de)activation and status
tracking by using push_kprobe/pop_kprobe, which supposed to work for
both initial kprobe entry as well as kprobe reentry and helps to avoid
handling those two cases differently. The problem is that a sequence of
calls in case of kprobes reenter:
push_kprobe() <- NULL (current_kprobe)
push_kprobe() <- kprobe1 (current_kprobe)
pop_kprobe() -> kprobe1 (current_kprobe)
pop_kprobe() -> kprobe1 (current_kprobe)
leaves "kprobe1" as "current_kprobe" on this cpu, instead of setting it
to NULL. In fact push_kprobe/pop_kprobe can only store a single state
(there is just one prev_kprobe in kprobe_ctlblk). Which is a hack but
sufficient, there is no need to have another prev_kprobe just to store
NULL. To make a simple and backportable fix simply reset "prev_kprobe"
when kprobe is poped from this "stack". No need to worry about
"kprobe_status" in this case, because its value is only checked when
current_kprobe != NULL.
Cc: stable@vger.kernel.org
Fixes: b9599798f9 ("[S390] kprobes: activation and deactivation")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Recent test_kprobe_missed kprobes kunit test uncovers the following error
(reported when CONFIG_DEBUG_ATOMIC_SLEEP is enabled):
BUG: sleeping function called from invalid context at kernel/locking/mutex.c:580
in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid: 662, name: kunit_try_catch
preempt_count: 0, expected: 0
RCU nest depth: 0, expected: 0
no locks held by kunit_try_catch/662.
irq event stamp: 280
hardirqs last enabled at (279): [<00000003e60a3d42>] __do_pgm_check+0x17a/0x1c0
hardirqs last disabled at (280): [<00000003e3bd774a>] kprobe_exceptions_notify+0x27a/0x318
softirqs last enabled at (0): [<00000003e3c5c890>] copy_process+0x14a8/0x4c80
softirqs last disabled at (0): [<0000000000000000>] 0x0
CPU: 46 PID: 662 Comm: kunit_try_catch Tainted: G N 6.2.0-173644-g44c18d77f0c0 #2
Hardware name: IBM 3931 A01 704 (LPAR)
Call Trace:
[<00000003e60a3a00>] dump_stack_lvl+0x120/0x198
[<00000003e3d02e82>] __might_resched+0x60a/0x668
[<00000003e60b9908>] __mutex_lock+0xc0/0x14e0
[<00000003e60bad5a>] mutex_lock_nested+0x32/0x40
[<00000003e3f7b460>] unregister_kprobe+0x30/0xd8
[<00000003e51b2602>] test_kprobe_missed+0xf2/0x268
[<00000003e51b5406>] kunit_try_run_case+0x10e/0x290
[<00000003e51b7dfa>] kunit_generic_run_threadfn_adapter+0x62/0xb8
[<00000003e3ce30f8>] kthread+0x2d0/0x398
[<00000003e3b96afa>] __ret_from_fork+0x8a/0xe8
[<00000003e60ccada>] ret_from_fork+0xa/0x40
The reason for this error report is that kprobes handling code failed
to restore irqs.
The problem is that when kprobe is triggered from another kprobe
post_handler current sequence of enable_singlestep / disable_singlestep
is the following:
enable_singlestep <- original kprobe (saves kprobe_saved_imask)
enable_singlestep <- kprobe triggered from post_handler (clobbers kprobe_saved_imask)
disable_singlestep <- kprobe triggered from post_handler (restores kprobe_saved_imask)
disable_singlestep <- original kprobe (restores wrong clobbered kprobe_saved_imask)
There is just one kprobe_ctlblk per cpu and both calls saves and
loads irq mask to kprobe_saved_imask. To fix the problem simply move
resume_execution (which calls disable_singlestep) before calling
post_handler. This also fixes the problem that post_handler is called
with pt_regs which were not yet adjusted after single-stepping.
Cc: stable@vger.kernel.org
Fixes: 4ba069b802 ("[S390] add kprobes support.")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
MT7621 SoC has a system controller node. Watchdog need to access to reset
status register. Ralink architecture and related driver are old and from
the beggining they are using some architecture dependent operations for
accessing this shared registers through 'asm/mach-ralink/ralink_regs.h'
header file. However this is not ideal from a driver perspective which can
just access to the system controller registers in an arch independent way
using regmap syscon APIs. Update Kconfig accordingly to select new added
dependencies and allow driver to be compile tested.
Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20230214103936.1061078-6-sergio.paracuellos@gmail.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Wim Van Sebroeck <wim@linux-watchdog.org>
This patch is used to fix following compilation issue with legacy gcc
error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int i = 0; i < adev->vcn.num_vcn_inst; ++i) {
Signed-off-by: bobzhou <bob.zhou@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[why]
More branch devices are able to support Freesync
over PCon so include them in the list of supporting devices.
[how]
Add more compatible PCon devices in the whitelist
for Freesync over Pcon.
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Sung Joon Kim <sungjoon.kim@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[WHY]
When PTEBufferSizeInRequests is zero, UBSAN reports the following
warning because dml_log2 returns an unexpected negative value:
shift exponent 4294966273 is too large for 32-bit type 'int'
[HOW]
In the case PTEBufferSizeInRequests is zero, skip the dml_log2() and
assign the result directly.
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Alex Hung <alex.hung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
building with gcc and W=1 reports
drivers/gpu/drm/amd/amdgpu/vcn_v4_0.c:81:29: error: variable
‘ring’ set but not used [-Werror=unused-but-set-variable]
81 | struct amdgpu_ring *ring;
| ^~~~
ring is not used so remove it.
Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
[Why]
Variable adev->crtc_irq.num_types was initialized as the value of
adev->mode_info.num_crtc at early_init stage, later at hw_init stage,
the num_crtc changed due to the display pipe harvest on some SKUs,
but the num_types was not updated accordingly, that cause below error
in gpu recover.
*ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_crtc_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_pflip_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3
*ERROR* amdgpu_dm_set_vupdate_irq_state: crtc is NULL at id :3
[How]
Defer the initialization of num_types to eliminate the error logs.
Signed-off-by: tiancyin <tianci.yin@amd.com>
Reviewed-by: Hamza Mahfooz <hamza.mahfooz@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This will let us pass the kms_hdr.bpc_switch IGT
test.
The reason the bpc restriction was required is
historical. At one point in time we were not falling
back to a lower bpc when we didn't have enough
bandwidth for the maximum bpc reported by a display.
This meant that we couldn't enable some high refresh
modes unless we limitted the bpc.
Starting with this patch the issue is fixed:
commit cbd14ae7ea ("drm/amd/display: Fix
incorrectly pruned modes with deep color")
This patch implemented a fallback mechanism if mode
validation failed at the max bpc. This means users
now automatically get all modes that can be supported
by at least 6 bpc. The driver will enable the mode
with the highest possible bpc that is supported by
the display.
v2:
- explain why this is no longer needed (Michel)
- refer to commit that fixed bpc fallback (Michel)
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Cc: Pekka Paalanen <ppaalanen@gmail.com>
Cc: Sebastian Wick <sebastian.wick@redhat.com>
Cc: Vitaly.Prosyak@amd.com
Cc: Joshua Ashton <joshua@froggi.es>
Cc: dri-devel@lists.freedesktop.org
Cc: amd-gfx@lists.freedesktop.org
Cc: Michel Dänzer <michel.daenzer@mailbox.org>
Reviewed-by: Joshua Ashton <joshua@froggi.es>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Fixes following warnings:
warning: no previous prototype for 'umc_v8_10_convert_error_address'
warning: variable 'channel_index' set but not used
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Candice Li <candice.li@amd.com>
Reviewed-by: Tao Zhou <tao.zhou1@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Apple iMac11,2 (mid 2010) also with Radeon HD-4670 that has the same
issue as iMac10,1 (late 2009) where the internal eDP panel stays dark on
driver load. This patch treats iMac11,2 the same as iMac10,1,
so the eDP panel stays active.
Additional steps:
Kernel boot parameter radeon.nomodeset=0 required to keep the eDP
panel active.
This patch is an extension of
commit 564d8a2cf3 ("drm/radeon: Fix eDP for single-display iMac10,1 (v2)")
Link: https://lore.kernel.org/all/lsq.1507553064.833262317@decadent.org.uk/
Signed-off-by: Mark Hawrylak <mark.hawrylak@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
When __cifs_readv() and __cifs_writev() extract pages from a user-backed
iterator into a BVEC-type iterator, they set ->bv_need_unpin to note
whether they need to unpin the pages later. However, in both cases they
examine the BVEC-type iterator and not the source iterator - and so
bv_need_unpin doesn't get set and the pages are leaked.
I think this may be responsible for the generic/208 xfstest failing
occasionally with:
WARNING: CPU: 0 PID: 3064 at mm/gup.c:218 try_grab_page+0x65/0x100
RIP: 0010:try_grab_page+0x65/0x100
follow_page_pte+0x1a7/0x570
__get_user_pages+0x1a2/0x650
__gup_longterm_locked+0xdc/0xb50
internal_get_user_pages_fast+0x17f/0x310
pin_user_pages_fast+0x46/0x60
iov_iter_extract_pages+0xc9/0x510
? __kmalloc_large_node+0xb1/0x120
? __kmalloc_node+0xbe/0x130
netfs_extract_user_iter+0xbf/0x200 [netfs]
__cifs_writev+0x150/0x330 [cifs]
vfs_write+0x2a8/0x3c0
ksys_pwrite64+0x65/0xa0
with the page refcount going negative. This is less unlikely than it seems
because the page is being pinned, not simply got, and so the refcount
increased by 1024 each time, and so only needs to be called around ~2097152
for the refcount to go negative.
Further, the test program (aio-dio-invalidate-failure) uses a 32MiB static
buffer and all the PTEs covering it refer to the same page because it's
never written to.
The warning in try_grab_page():
if (WARN_ON_ONCE(folio_ref_count(folio) <= 0))
return -ENOMEM;
then trips and prevents us ever using the page again for DIO at least.
Fixes: d08089f649 ("cifs: Change the I/O paths to use an iterator rather than a page list")
Reported-by: Murphy Zhou <jencce.kernel@gmail.com>
Link: https://lore.kernel.org/r/CAH2r5mvaTsJ---n=265a4zqRA7pP+o4MJ36WCQUS6oPrOij8cw@mail.gmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Make sure to get an up-to-date TCP_Server_Info::nr_targets value prior
to waiting the server to be reconnected in cifs_reconnect_tcon(). It
is set in cifs_tcp_ses_needs_reconnect() and protected by
TCP_Server_Info::srv_lock.
Create a new cifs_wait_for_server_reconnect() helper that can be used
by both SMB2+ and CIFS reconnect code.
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Do not map STATUS_OBJECT_NAME_INVALID to -EREMOTE under non-DFS
shares, or 'nodfs' mounts or CONFIG_CIFS_DFS_UPCALL=n builds.
Otherwise, in the slow path, get a referral to figure out whether it
is an actual DFS link.
This could be simply reproduced under a non-DFS share by running the
following
$ mount.cifs //srv/share /mnt -o ...
$ cat /mnt/$(printf '\U110000')
cat: '/mnt/'$'\364\220\200\200': Object is remote
Fixes: c877ce47e1 ("cifs: reduce roundtrips on create/qinfo requests")
CC: stable@vger.kernel.org # 6.2
Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
cifs_write_back_from_locked_folio() should return the number of bytes read,
but returns the result of ->async_writev(), which will be 0 on success. As
it happens, this doesn't prevent cifs_writepages_region() from working as
it will then examine and ignore the pages that are no longer dirty rather
than just skipping over them.
Fixes: d08089f649 ("cifs: Change the I/O paths to use an iterator rather than a page list")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Tom Talpey <tom@talpey.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: linux-cifs@vger.kernel.org
Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
We have two pieces of code that does pretty much the same
comparison. This change reuses cifs_match_ipaddr within
match_address.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
match_address function matches the scope id for ipv6 addresses,
but cifs_match_ipaddr (which is another function used for comparison)
does not use scope id. Doing so with this change.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Pull nfsd fix from Chuck Lever:
- Make new GSS Kerberos Kunit tests work on non-x86 platforms
* tag 'nfsd-6.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/cel/linux:
SUNRPC: Properly terminate test case arrays
SUNRPC: Let Kunit tests run with some enctypes compiled out
