- 15 Feb, 2022 17 commits
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Martin Kaiser authored
We've already limited the rtw_wx_write_rf function to RF_PATH_A in commit 3b011b09 ("staging: r8188eu: limit rf register writes to path a"). Set RF_PATH_A explicitly when we call rtl8188e_PHY_SetRFReg. This will make it easier later to verify that all callers of rtl8188e_PHY_SetRFReg use path a. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Link: https://lore.kernel.org/r/20220212161737.381841-2-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Straube authored
There are some unused enums in the ieee80211.h header. Remove them. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20220210101623.13758-3-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Straube authored
There are lots of unused structures in the ieee80211.h header. Remove them. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20220210101623.13758-2-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Martin Kaiser authored
There's no need to store the usb device speed in struct dvobj_priv. We can read the speed from struct usb_device. dvobj_priv has a pointer to the usb_device. Reorder one if-statement to make the code clearer. Signed-off-by: Martin Kaiser <martin@kaiser.cx> Link: https://lore.kernel.org/r/20220209192842.99399-1-martin@kaiser.cxSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Straube authored
Remove unused constants from enum hw_variables. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20220209073618.29725-3-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Michael Straube authored
Remove an unused enum from rtl8188e_hal_init.c. Signed-off-by: Michael Straube <straube.linux@gmail.com> Link: https://lore.kernel.org/r/20220209073618.29725-2-straube.linux@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Fabio M. De Francesco authored
checkpatch.pl emits the following warning: CHECK: Prefer kzalloc(sizeof(*pcmd)...) over kzalloc(sizeof(struct cmd_obj)...) + pcmd = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL); CHECK: Prefer kzalloc(sizeof(*psetkeyparm)...) over kzalloc(sizeof(struct setkey_parm)...) + psetkeyparm = kzalloc(sizeof(struct setkey_parm), GFP_KERNEL). According to the above "CHECK[S]", use the preferred style in the two kzalloc() of rtw_set_key(). Signed-off-by: Fabio M. De Francesco <fmdefrancesco@gmail.com> Link: https://lore.kernel.org/r/20220208180426.27455-2-fmdefrancesco@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Vihas Makwana authored
Keep the success path and error path separate in rtw_usb_if1_init() and drop the "status" variable. Also, remove do-nothing gotos. Reviewed-by: Pavel Skripkin <paskripkin@gmail.com> Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: Vihas Makwana <makvihas@gmail.com> Link: https://lore.kernel.org/r/20220209190752.7232-1-makvihas@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Sergio Paracuellos authored
MT7621 system controller node is already providing the clocks for the whole system but must also serve as a reset provider. Hence, add reset controller related code to the clock driver itself. To get resets properly ready for the rest of the world we need to move platform driver initialization process to 'arch_initcall'. CC: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Link: https://lore.kernel.org/r/20220210094859.927868-3-sergio.paracuellos@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Sergio Paracuellos authored
Make system controller a reset provider for all the peripherals in the MT7621 SoC adding '#reset-cells' property. Acked-by: Rob Herring <robh@kernel.org> Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com> Link: https://lore.kernel.org/r/20220210094859.927868-2-sergio.paracuellos@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jiapeng Chong authored
Eliminate the follow coccicheck warning: ./drivers/staging/r8188eu/hal/usb_halinit.c:1105:3-5: WARNING: possible condition with no effect (if == else). Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Link: https://lore.kernel.org/r/20220211080322.80388-1-jiapeng.chong@linux.alibaba.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Minghao Chi (CGEL ZTE) authored
'destroy_workqueue()' already drains the queue before destroying it, so there is no need to flush it explicitly. Remove the redundant 'flush_workqueue()' calls. Reported-by: Zeal Robot <zealci@zte.com.cn> Reviewed-by: Rui Miguel Silva <rmfrfs@gmail.com> Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn> Link: https://lore.kernel.org/r/20220210060205.1607792-1-chi.minghao@zte.com.cnSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Minghao Chi (CGEL ZTE) authored
'destroy_workqueue()' already drains the queue before destroying it, so there is no need to flush it explicitly. Remove the redundant 'flush_workqueue()' calls. Reported-by: Zeal Robot <zealci@zte.com.cn> Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn> Link: https://lore.kernel.org/r/20220210060411.1607928-1-chi.minghao@zte.com.cnSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cai Huoqing authored
Replace "struct list_head head = LIST_HEAD_INIT(head)" with "LIST_HEAD(head)" to simplify the code. Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev> Link: https://lore.kernel.org/r/20220209032645.38305-1-cai.huoqing@linux.devSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Cai Huoqing authored
Replace "struct list_head head = LIST_HEAD_INIT(head)" with "LIST_HEAD(head)" to simplify the code. Signed-off-by: Cai Huoqing <cai.huoqing@linux.dev> Link: https://lore.kernel.org/r/20220209032715.38437-1-cai.huoqing@linux.devSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jérôme Pouiller authored
We don't want to support legacy PDS format. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> Link: https://lore.kernel.org/r/20220211162659.528333-3-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Jérôme Pouiller authored
The device needs data about the antenna configuration. This information in provided by PDS (Platform Data Set, this is the wording used in WF200 documentation) files. Until now, the driver had to parse the PDS file before to send it. This solution was not acceptable for the vanilla kernel. We have slightly changed the PDS format so it is now an array of Type-Length-Value. This patch allows to support new format and keep compatibility with legacy format. Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com> probe: allow new PDS format Link: https://lore.kernel.org/r/20220211162659.528333-2-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 14 Feb, 2022 1 commit
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Greg Kroah-Hartman authored
We need the staging driver fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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- 13 Feb, 2022 9 commits
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Linus Torvalds authored
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Linus Torvalds authored
Merge tag 'kbuild-fixes-v5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild fixes from Masahiro Yamada: - Fix the truncated path issue for HAVE_GCC_PLUGINS test in Kconfig - Move -Wunsligned-access to W=1 builds to avoid sprinkling warnings for the latest Clang - Fix missing fclose() in Kconfig - Fix Kconfig to touch dep headers correctly when KCONFIG_AUTOCONFIG is overridden. * tag 'kbuild-fixes-v5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: kconfig: fix failing to generate auto.conf kconfig: fix missing fclose() on error paths Makefile.extrawarn: Move -Wunaligned-access to W=1 kconfig: let 'shell' return enough output for deep path names
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull irq fixes from Thomas Gleixner: "Interrupt chip driver fixes: - Don't install an hotplug notifier for GICV3-ITS on systems which do not need it to prevent a warning in the notifier about inconsistent state - Add the missing device tree matching for the T-HEAD PLIC variant so the related SoC is properly supported" * tag 'irq-urgent-2022-02-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: irqchip/sifive-plic: Add missing thead,c900-plic match string dt-bindings: update riscv plic compatible string irqchip/gic-v3-its: Skip HP notifier when no ITS is registered
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull objtool fix from Borislav Petkov: "Fix a case where objtool would mistakenly warn about instructions being unreachable" * tag 'objtool_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/bug: Merge annotate_reachable() into _BUG_FLAGS() asm
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull scheduler fix from Borislav Petkov: "Fix a NULL-ptr dereference when recalculating a sched entity's weight" * tag 'sched_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched/fair: Fix fault in reweight_entity
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull perf fix from Borislav Petkov: "Prevent cgroup event list corruption when switching events" * tag 'perf_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: perf: Fix list corruption in perf_cgroup_switch()
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fix from Borislav Petkov: "Prevent softlockups when tearing down large SGX enclaves" * tag 'x86_urgent_for_v5.17_rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/sgx: Silence softlockup detection when releasing large enclaves
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git://git.samba.org/sfrench/cifs-2.6Linus Torvalds authored
Pull cifs fixes from Steve French: "Three small smb3 reconnect fixes and an error log clarification" * tag '5.17-rc4-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6: cifs: mark sessions for reconnection in helper function cifs: call helper functions for marking channels for reconnect cifs: call cifs_reconnect when a connection is marked [smb3] improve error message when mount options conflict with posix
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Thomas Gleixner authored
Merge tag 'irqchip-fixes-5.17-2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent Pull irqchip fixes from Marc Zyngier: - Don't register a hotplug notifier on GICv3 systems that advertise LPI support, but have no ITS to make use of it - Add missing DT matching for the thead,c900-plic variant of the SiFive PLIC Link: https://lore.kernel.org/r/20220211110038.1179155-1-maz@kernel.org
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- 12 Feb, 2022 13 commits
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git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsiLinus Torvalds authored
Pull SCSI fixes from James Bottomley: "Two minor fixes in the lpfc driver. One changing the classification of trace messages and the other fixing a build issue when NVME_FC is disabled" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: lpfc: Reduce log messages seen after firmware download scsi: lpfc: Remove NVMe support if kernel has NVME_FC disabled
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-miscLinus Torvalds authored
Pull char/misc driver fixes from Greg KH: "Here are a small number of char/misc driver fixes for 5.17-rc4 for reported issues. They contain: - phy driver fixes - iio driver fix - eeprom driver fix - speakup regression fix - fastrpc fix All of these have been in linux-next with no reported issues" * tag 'char-misc-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: iio: buffer: Fix file related error handling in IIO_BUFFER_GET_FD_IOCTL speakup-dectlk: Restore pitch setting bus: mhi: pci_generic: Add mru_default for Cinterion MV31-W bus: mhi: pci_generic: Add mru_default for Foxconn SDX55 eeprom: ee1004: limit i2c reads to I2C_SMBUS_BLOCK_MAX misc: fastrpc: avoid double fput() on failed usercopy phy: dphy: Correct clk_pre parameter phy: phy-mtk-tphy: Fix duplicated argument in phy-mtk-tphy phy: stm32: fix a refcount leak in stm32_usbphyc_pll_enable() phy: xilinx: zynqmp: Fix bus width setting for SGMII phy: cadence: Sierra: fix error handling bugs in probe() phy: ti: Fix missing sentinel for clk_div_table phy: broadcom: Kconfig: Fix PHY_BRCM_USB config option phy: usb: Leave some clocks running during suspend
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/stagingLinus Torvalds authored
Pullstaging driver fixes from Greg KH: "Here are two staging driver fixes for 5.17-rc4. These are: - fbtft error path fix - vc04_services rcu dereference fix Both of these have been in linux-next for a while with no reported issues" * tag 'staging-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging: staging: fbtft: Fix error path in fbtft_driver_module_init() staging: vc04_services: Fix RCU dereference check
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/ttyLinus Torvalds authored
Pull tty/serial fixes from Greg KH: "Here are four small tty/serial fixes for 5.17-rc4. They are: - 8250_pericom change revert to fix a reported regression - two speculation fixes for vt_ioctl - n_tty regression fix for polling All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: vt_ioctl: add array_index_nospec to VT_ACTIVATE vt_ioctl: fix array_index_nospec in vt_setactivate serial: 8250_pericom: Revert "Re-enable higher baud rates" n_tty: wake up poll(POLLRDNORM) on receiving data
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usbLinus Torvalds authored
Pull USB fixes from Greg KH: "Here are some small USB driver fixes for 5.17-rc4 that resolve some reported issues and add new device ids: - usb-serial new device ids - ulpi cleanup fixes - f_fs use-after-free fix - dwc3 driver fixes - ax88179_178a usb network driver fix - usb gadget fixes There is a revert at the end of this series to resolve a build problem that 0-day found yesterday. Most of these have been in linux-next, except for the last few, and all have now passed 0-day tests" * tag 'usb-5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: Revert "usb: dwc2: drd: fix soft connect when gadget is unconfigured" usb: dwc2: drd: fix soft connect when gadget is unconfigured usb: gadget: rndis: check size of RNDIS_MSG_SET command USB: gadget: validate interface OS descriptor requests usb: core: Unregister device on component_add() failure net: usb: ax88179_178a: Fix out-of-bounds accesses in RX fixup usb: dwc3: gadget: Prevent core from processing stale TRBs USB: serial: cp210x: add CPI Bulk Coin Recycler id USB: serial: cp210x: add NCR Retail IO box id USB: serial: ftdi_sio: add support for Brainboxes US-159/235/320 usb: gadget: f_uac2: Define specific wTerminalType usb: gadget: udc: renesas_usb3: Fix host to USB_ROLE_NONE transition usb: raw-gadget: fix handling of dual-direction-capable endpoints usb: usb251xb: add boost-up property support usb: ulpi: Call of_node_put correctly usb: ulpi: Move of_node_put to ulpi_dev_release USB: serial: option: add ZTE MF286D modem USB: serial: ch341: add support for GW Instek USB2.0-Serial devices usb: f_fs: Fix use-after-free for epfile usb: dwc3: xilinx: fix uninitialized return value
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git://git.kernel.org/pub/scm/linux/kernel/git/s390/linuxLinus Torvalds authored
Pull s390 updates from Vasily Gorbik: "Maintainers and reviewers changes: - Add Alexander Gordeev as maintainer for s390. - Christian Borntraeger will focus on s390 KVM maintainership and stays as s390 reviewer. Fixes: - Fix clang build of modules loader KUnit test. - Fix kernel panic in CIO code on FCES path-event when no driver is attached to a device or the driver does not provide the path_event function" * tag 's390-5.17-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/cio: verify the driver availability for path_event call s390/module: fix building test_modules_helpers.o with clang MAINTAINERS: downgrade myself to Reviewer for s390 MAINTAINERS: add Alexander Gordeev as maintainer for s390
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tipLinus Torvalds authored
Pull xen fixes from Juergen Gross: - Two small cleanups - Another fix for addressing the EFI framebuffer above 4GB when running as Xen dom0 - A patch to let Xen guests use reserved bits in MSI- and IO-APIC- registers for extended APIC-IDs the same way KVM guests are doing it already * tag 'for-linus-5.17a-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/pci: Make use of the helper macro LIST_HEAD() xen/x2apic: Fix inconsistent indenting xen/x86: detect support for extended destination ID xen/x86: obtain full video frame buffer address for Dom0 also under EFI
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git://git.kernel.org/pub/scm/linux/kernel/git/kees/linuxLinus Torvalds authored
Pull seccomp fixes from Kees Cook: "This fixes a corner case of fatal SIGSYS being ignored since v5.15. Along with the signal fix is a change to seccomp so that seeing another syscall after a fatal filter result will cause seccomp to kill the process harder. Summary: - Force HANDLER_EXIT even for SIGNAL_UNKILLABLE - Make seccomp self-destruct after fatal filter results - Update seccomp samples for easier behavioral demonstration" * tag 'seccomp-v5.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: samples/seccomp: Adjust sample to also provide kill option seccomp: Invalidate seccomp mode to catch death failures signal: HANDLER_EXIT should clear SIGNAL_UNKILLABLE
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Linus Torvalds authored
Merge misc fixes from Andrew Morton: "5 patches. Subsystems affected by this patch series: binfmt, procfs, and mm (vmscan, memcg, and kfence)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: kfence: make test case compatible with run time set sample interval mm: memcg: synchronize objcg lists with a dedicated spinlock mm: vmscan: remove deadlock due to throttling failing to make progress fs/proc: task_mmu.c: don't read mapcount for migration entry fs/binfmt_elf: fix PT_LOAD p_align values for loaders
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Jing Leng authored
When the KCONFIG_AUTOCONFIG is specified (e.g. export \ KCONFIG_AUTOCONFIG=output/config/auto.conf), the directory of include/config/ will not be created, so kconfig can't create deps files in it and auto.conf can't be generated. Signed-off-by: Jing Leng <jleng@ambarella.com> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
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Greg Kroah-Hartman authored
This reverts commit 269cbcf7. It causes build errors as reported by the kernel test robot. Link: https://lore.kernel.org/r/202202112236.AwoOTtHO-lkp@intel.comReported-by: kernel test robot <lkp@intel.com> Fixes: 269cbcf7 ("usb: dwc2: drd: fix soft connect when gadget is unconfigured") Cc: stable@kernel.org Cc: Amelie Delaunay <amelie.delaunay@foss.st.com> Cc: Minas Harutyunyan <Minas.Harutyunyan@synopsys.com> Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Peng Liu authored
The parameter kfence_sample_interval can be set via boot parameter and late shell command, which is convenient for automated tests and KFENCE parameter optimization. However, KFENCE test case just uses compile-time CONFIG_KFENCE_SAMPLE_INTERVAL, which will make KFENCE test case not run as users desired. Export kfence_sample_interval, so that KFENCE test case can use run-time-set sample interval. Link: https://lkml.kernel.org/r/20220207034432.185532-1-liupeng256@huawei.comSigned-off-by: Peng Liu <liupeng256@huawei.com> Reviewed-by: Marco Elver <elver@google.com> Cc: Alexander Potapenko <glider@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Sumit Semwal <sumit.semwal@linaro.org> Cc: Christian Knig <christian.koenig@amd.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Roman Gushchin authored
Alexander reported a circular lock dependency revealed by the mmap1 ltp test: LOCKDEP_CIRCULAR (suite: ltp, case: mtest06 (mmap1)) WARNING: possible circular locking dependency detected 5.17.0-20220113.rc0.git0.f2211f194038.300.fc35.s390x+debug #1 Not tainted ------------------------------------------------------ mmap1/202299 is trying to acquire lock: 00000001892c0188 (css_set_lock){..-.}-{2:2}, at: obj_cgroup_release+0x4a/0xe0 but task is already holding lock: 00000000ca3b3818 (&sighand->siglock){-.-.}-{2:2}, at: force_sig_info_to_task+0x38/0x180 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&sighand->siglock){-.-.}-{2:2}: __lock_acquire+0x604/0xbd8 lock_acquire.part.0+0xe2/0x238 lock_acquire+0xb0/0x200 _raw_spin_lock_irqsave+0x6a/0xd8 __lock_task_sighand+0x90/0x190 cgroup_freeze_task+0x2e/0x90 cgroup_migrate_execute+0x11c/0x608 cgroup_update_dfl_csses+0x246/0x270 cgroup_subtree_control_write+0x238/0x518 kernfs_fop_write_iter+0x13e/0x1e0 new_sync_write+0x100/0x190 vfs_write+0x22c/0x2d8 ksys_write+0x6c/0xf8 __do_syscall+0x1da/0x208 system_call+0x82/0xb0 -> #0 (css_set_lock){..-.}-{2:2}: check_prev_add+0xe0/0xed8 validate_chain+0x736/0xb20 __lock_acquire+0x604/0xbd8 lock_acquire.part.0+0xe2/0x238 lock_acquire+0xb0/0x200 _raw_spin_lock_irqsave+0x6a/0xd8 obj_cgroup_release+0x4a/0xe0 percpu_ref_put_many.constprop.0+0x150/0x168 drain_obj_stock+0x94/0xe8 refill_obj_stock+0x94/0x278 obj_cgroup_charge+0x164/0x1d8 kmem_cache_alloc+0xac/0x528 __sigqueue_alloc+0x150/0x308 __send_signal+0x260/0x550 send_signal+0x7e/0x348 force_sig_info_to_task+0x104/0x180 force_sig_fault+0x48/0x58 __do_pgm_check+0x120/0x1f0 pgm_check_handler+0x11e/0x180 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sighand->siglock); lock(css_set_lock); lock(&sighand->siglock); lock(css_set_lock); *** DEADLOCK *** 2 locks held by mmap1/202299: #0: 00000000ca3b3818 (&sighand->siglock){-.-.}-{2:2}, at: force_sig_info_to_task+0x38/0x180 #1: 00000001892ad560 (rcu_read_lock){....}-{1:2}, at: percpu_ref_put_many.constprop.0+0x0/0x168 stack backtrace: CPU: 15 PID: 202299 Comm: mmap1 Not tainted 5.17.0-20220113.rc0.git0.f2211f194038.300.fc35.s390x+debug #1 Hardware name: IBM 3906 M04 704 (LPAR) Call Trace: dump_stack_lvl+0x76/0x98 check_noncircular+0x136/0x158 check_prev_add+0xe0/0xed8 validate_chain+0x736/0xb20 __lock_acquire+0x604/0xbd8 lock_acquire.part.0+0xe2/0x238 lock_acquire+0xb0/0x200 _raw_spin_lock_irqsave+0x6a/0xd8 obj_cgroup_release+0x4a/0xe0 percpu_ref_put_many.constprop.0+0x150/0x168 drain_obj_stock+0x94/0xe8 refill_obj_stock+0x94/0x278 obj_cgroup_charge+0x164/0x1d8 kmem_cache_alloc+0xac/0x528 __sigqueue_alloc+0x150/0x308 __send_signal+0x260/0x550 send_signal+0x7e/0x348 force_sig_info_to_task+0x104/0x180 force_sig_fault+0x48/0x58 __do_pgm_check+0x120/0x1f0 pgm_check_handler+0x11e/0x180 INFO: lockdep is turned off. In this example a slab allocation from __send_signal() caused a refilling and draining of a percpu objcg stock, resulted in a releasing of another non-related objcg. Objcg release path requires taking the css_set_lock, which is used to synchronize objcg lists. This can create a circular dependency with the sighandler lock, which is taken with the locked css_set_lock by the freezer code (to freeze a task). In general it seems that using css_set_lock to synchronize objcg lists makes any slab allocations and deallocation with the locked css_set_lock and any intervened locks risky. To fix the problem and make the code more robust let's stop using css_set_lock to synchronize objcg lists and use a new dedicated spinlock instead. Link: https://lkml.kernel.org/r/Yfm1IHmoGdyUR81T@carbon.dhcp.thefacebook.com Fixes: bf4f0599 ("mm: memcg/slab: obj_cgroup API") Signed-off-by: Roman Gushchin <guro@fb.com> Reported-by: Alexander Egorenkov <egorenar@linux.ibm.com> Tested-by: Alexander Egorenkov <egorenar@linux.ibm.com> Reviewed-by: Waiman Long <longman@redhat.com> Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Shakeel Butt <shakeelb@google.com> Reviewed-by: Jeremy Linton <jeremy.linton@arm.com> Tested-by: Jeremy Linton <jeremy.linton@arm.com> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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