February 2021 - Linux-stable-mirror

[PATCH] crypto: public_key: check that pkey_algo is non-NULL before passing it to strcmp()

by Toke Høiland-Jørgensen

When public_key_verify_signature() is called from asymmetric_key_verify_signature(), the pkey_algo field of struct public_key_signature will be NULL, which causes a NULL pointer dereference in the strcmp() check. Fix this by adding a NULL check. One visible manifestation of this is that userspace programs (such as the 'iwd' WiFi daemon) will be killed when trying to verify a TLS key using the keyctl(2) interface. Cc: stable(a)vger.kernel.org Fixes: 215525639631 ("X.509: support OSCCA SM2-with-SM3 certificate verification") Signed-off-by: Toke Høiland-Jørgensen <toke(a)redhat.com> --- crypto/asymmetric_keys/public_key.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/crypto/asymmetric_keys/public_key.c b/crypto/asymmetric_keys/public_key.c index 8892908ad58c..35b09e95a870 100644 --- a/crypto/asymmetric_keys/public_key.c +++ b/crypto/asymmetric_keys/public_key.c @@ -356,7 +356,7 @@ int public_key_verify_signature(const struct public_key *pkey, if (ret) goto error_free_key; - if (strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) { + if (sig->pkey_algo && strcmp(sig->pkey_algo, "sm2") == 0 && sig->data_size) { ret = cert_sig_digest_update(sig, tfm); if (ret) goto error_free_key; -- 2.30.0

3 years, 1 month

6
11
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[PATCH 4.14 00/50] 4.14.217-rc1 review

by Greg Kroah-Hartman

This is the start of the stable review cycle for the 4.14.217 release. There are 50 patches in this series, all will be posted as a response to this one. If anyone has any issues with these being applied, please let me know. Responses should be made by Sun, 24 Jan 2021 13:57:23 +0000. Anything received after that time might be too late. The whole patch series can be found in one patch at: https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-4.14.217-r… or in the git tree and branch at: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y and the diffstat can be found below. thanks, greg k-h ------------- Pseudo-Shortlog of commits: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org> Linux 4.14.217-rc1 Michael Hennerich <michael.hennerich(a)analog.com> spi: cadence: cache reference clock rate during probe Aya Levin <ayal(a)nvidia.com> net: ipv6: Validate GSO SKB before finish IPv6 processing Jason A. Donenfeld <Jason(a)zx2c4.com> net: skbuff: disambiguate argument and member for skb_list_walk_safe helper Jason A. Donenfeld <Jason(a)zx2c4.com> net: introduce skb_list_walk_safe for skb segment walking Edward Cree <ecree(a)solarflare.com> net: use skb_list_del_init() to remove from RX sublists Hoang Le <hoang.h.le(a)dektech.com.au> tipc: fix NULL deref in tipc_link_xmit() David Howells <dhowells(a)redhat.com> rxrpc: Fix handling of an unsupported token type in rxrpc_read() Eric Dumazet <edumazet(a)google.com> net: avoid 32 x truesize under-estimation for tiny skbs Jakub Kicinski <kuba(a)kernel.org> net: sit: unregister_netdevice on newlink's error path David Wu <david.wu(a)rock-chips.com> net: stmmac: Fixed mtu channged by cache aligned Petr Machata <petrm(a)nvidia.com> net: dcb: Accept RTM_GETDCB messages carrying set-like DCB commands Petr Machata <me(a)pmachata.org> net: dcb: Validate netlink message in DCB handler Willem de Bruijn <willemb(a)google.com> esp: avoid unneeded kmap_atomic call Andrey Zhizhikin <andrey.zhizhikin(a)leica-geosystems.com> rndis_host: set proper input size for OID_GEN_PHYSICAL_MEDIUM request Manish Chopra <manishc(a)marvell.com> netxen_nic: fix MSI/MSI-x interrupts J. Bruce Fields <bfields(a)redhat.com> nfsd4: readdirplus shouldn't return parent of export Will Deacon <will(a)kernel.org> compiler.h: Raise minimum version of GCC to 5.1 for arm64 Hamish Martin <hamish.martin(a)alliedtelesis.co.nz> usb: ohci: Make distrust_firmware param default to false Jesper Dangaard Brouer <brouer(a)redhat.com> netfilter: conntrack: fix reading nf_conntrack_buckets Geert Uytterhoeven <geert+renesas(a)glider.be> ALSA: fireface: Fix integer overflow in transmit_midi_msg() Geert Uytterhoeven <geert+renesas(a)glider.be> ALSA: firewire-tascam: Fix integer overflow in midi_port_work() Mike Snitzer <snitzer(a)redhat.com> dm: eliminate potential source of excessive kernel log noise j.nixdorf(a)avm.de <j.nixdorf(a)avm.de> net: sunrpc: interpret the return value of kstrtou32 correctly Jann Horn <jannh(a)google.com> mm, slub: consider rest of partial list if acquire_slab() fails Dinghao Liu <dinghao.liu(a)zju.edu.cn> RDMA/usnic: Fix memleak in find_free_vf_and_create_qp_grp Jan Kara <jack(a)suse.cz> ext4: fix superblock checksum failure when setting password salt Trond Myklebust <trond.myklebust(a)hammerspace.com> NFS: nfs_igrab_and_active must first reference the superblock Trond Myklebust <trond.myklebust(a)hammerspace.com> pNFS: Mark layout for return if return-on-close was not sent Dave Wysochanski <dwysocha(a)redhat.com> NFS4: Fix use-after-free in trace_event_raw_event_nfs4_set_lock Dan Carpenter <dan.carpenter(a)oracle.com> ASoC: Intel: fix error code cnl_set_dsp_D0() Al Viro <viro(a)zeniv.linux.org.uk> dump_common_audit_data(): fix racy accesses to ->d_name Arnd Bergmann <arnd(a)arndb.de> ARM: picoxcell: fix missing interrupt-parent properties Shawn Guo <shawn.guo(a)linaro.org> ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI Michael Ellerman <mpe(a)ellerman.id.au> net: ethernet: fs_enet: Add missing MODULE_LICENSE Arnd Bergmann <arnd(a)arndb.de> misdn: dsp: select CONFIG_BITREVERSE Randy Dunlap <rdunlap(a)infradead.org> arch/arc: add copy_user_page() to <asm/page.h> to fix build error on ARC Rasmus Villemoes <rasmus.villemoes(a)prevas.dk> ethernet: ucc_geth: fix definition and size of ucc_geth_tx_global_pram Filipe Manana <fdmanana(a)suse.com> btrfs: fix transaction leak and crash after RO remount caused by qgroup rescan Masahiro Yamada <masahiroy(a)kernel.org> ARC: build: add boot_targets to PHONY Masahiro Yamada <masahiroy(a)kernel.org> ARC: build: add uImage.lzma to the top-level target Masahiro Yamada <masahiroy(a)kernel.org> ARC: build: remove non-existing bootpImage from KBUILD_IMAGE yangerkun <yangerkun(a)huawei.com> ext4: fix bug for rename with RENAME_WHITEOUT Leon Schuermann <leon(a)is.currently.online> r8152: Add Lenovo Powered USB-C Travel Hub Akilesh Kailash <akailash(a)google.com> dm snapshot: flush merged data before committing metadata Miaohe Lin <linmiaohe(a)huawei.com> mm/hugetlb: fix potential missing huge page size info Dexuan Cui <decui(a)microsoft.com> ACPI: scan: Harden acpi_device_add() against device ID overflows Alexander Lobakin <alobakin(a)pm.me> MIPS: relocatable: fix possible boot hangup with KASLR enabled Al Viro <viro(a)zeniv.linux.org.uk> MIPS: Fix malformed NT_FILE and NT_SIGINFO in 32bit coredumps Paul Cercueil <paul(a)crapouillou.net> MIPS: boot: Fix unaligned access with CONFIG_MIPS_RAW_APPENDED_DTB Thomas Hebb <tommyhebb(a)gmail.com> ASoC: dapm: remove widget from dirty list on free ------------- Diffstat: Makefile | 4 +-- arch/arc/Makefile | 9 ++--- arch/arc/include/asm/page.h | 1 + arch/arm/boot/dts/picoxcell-pc3x2.dtsi | 4 +++ arch/mips/boot/compressed/decompress.c | 3 +- arch/mips/kernel/binfmt_elfn32.c | 7 ++++ arch/mips/kernel/binfmt_elfo32.c | 7 ++++ arch/mips/kernel/relocate.c | 10 ++++-- drivers/acpi/internal.h | 2 +- drivers/acpi/scan.c | 15 +++++++- drivers/infiniband/hw/usnic/usnic_ib_verbs.c | 3 ++ drivers/isdn/mISDN/Kconfig | 1 + drivers/md/dm-snap.c | 24 +++++++++++++ drivers/md/dm.c | 2 +- .../net/ethernet/freescale/fs_enet/mii-bitbang.c | 1 + drivers/net/ethernet/freescale/fs_enet/mii-fec.c | 1 + drivers/net/ethernet/freescale/ucc_geth.h | 9 ++++- .../net/ethernet/qlogic/netxen/netxen_nic_main.c | 7 +--- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 3 +- drivers/net/usb/cdc_ether.c | 7 ++++ drivers/net/usb/r8152.c | 1 + drivers/net/usb/rndis_host.c | 2 +- drivers/spi/spi-cadence.c | 6 ++-- drivers/usb/host/ohci-hcd.c | 2 +- fs/btrfs/qgroup.c | 13 +++++-- fs/btrfs/super.c | 8 +++++ fs/ext4/ioctl.c | 3 ++ fs/ext4/namei.c | 16 +++++---- fs/nfs/internal.h | 12 ++++--- fs/nfs/nfs4proc.c | 2 +- fs/nfs/pnfs.c | 6 ++++ fs/nfsd/nfs3xdr.c | 7 +++- include/linux/acpi.h | 7 ++++ include/linux/compiler-gcc.h | 6 ++++ include/linux/skbuff.h | 16 +++++++++ mm/hugetlb.c | 2 +- mm/slub.c | 2 +- net/core/skbuff.c | 9 +++-- net/dcb/dcbnl.c | 2 ++ net/ipv4/esp4.c | 7 +--- net/ipv6/esp6.c | 7 +--- net/ipv6/ip6_output.c | 40 +++++++++++++++++++++- net/ipv6/sit.c | 5 ++- net/netfilter/nf_conntrack_standalone.c | 3 ++ net/rxrpc/key.c | 6 ++-- net/sunrpc/addr.c | 2 +- net/tipc/link.c | 9 +++-- security/lsm_audit.c | 7 ++-- sound/firewire/fireface/ff-transaction.c | 2 +- sound/firewire/tascam/tascam-transaction.c | 2 +- sound/soc/intel/skylake/cnl-sst.c | 1 + sound/soc/soc-dapm.c | 1 + 52 files changed, 263 insertions(+), 71 deletions(-)

3 years, 1 month

6
61
0 0

[PATCH] drm/gem: add checks of drm_gem_object->funcs

by Pavel Turinský

The checks were removed in commit d693def4fd1c ("drm: Remove obsolete GEM and PRIME callbacks from struct drm_driver") and can lead to following kernel oops: [ 139.449098] BUG: kernel NULL pointer dereference, address: 0000000000000008 [ 139.449110] #PF: supervisor read access in kernel mode [ 139.449113] #PF: error_code(0x0000) - not-present page [ 139.449116] PGD 0 P4D 0 [ 139.449121] Oops: 0000 [#1] PREEMPT SMP PTI [ 139.449126] CPU: 4 PID: 1181 Comm: Xorg Not tainted 5.11.2LEdoian #2 [ 139.449130] Hardware name: Gigabyte Technology Co., Ltd. To be filled by O.E.M./Z77-DS3H, BIOS F4 04/25/2012 [ 139.449133] RIP: 0010:drm_gem_handle_create_tail+0xcb/0x190 [drm] [ 139.449185] Code: 00 48 89 ef e8 06 b4 49 f7 45 85 e4 78 77 48 8d 6b 18 4c 89 ee 48 89 ef e8 c2 f5 00 00 89 c2 85 c0 75 3e 48 8b 83 40 01 00 00 <48> 8b 40 0 8 48 85 c0 74 0f 4c 89 ee 48 89 df e8 71 5d 87 f7 85 c0 [ 139.449190] RSP: 0018:ffffbe21c194bd28 EFLAGS: 00010246 [ 139.449194] RAX: 0000000000000000 RBX: ffff9da9b3caf078 RCX: 0000000000000000 [ 139.449197] RDX: 0000000000000000 RSI: ffffffffc039b893 RDI: 0000000000000000 [ 139.449199] RBP: ffff9da9b3caf090 R08: 0000000000000040 R09: ffff9da983b911c0 [ 139.449202] R10: ffff9da984749e00 R11: ffff9da9859bfc38 R12: 0000000000000007 [ 139.449204] R13: ffff9da9859bfc00 R14: ffff9da9859bfc50 R15: ffff9da9859bfc38 [ 139.449207] FS: 00007f6332a56900(0000) GS:ffff9daea7b00000(0000) knlGS:0000000000000000 [ 139.449211] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 139.449214] CR2: 0000000000000008 CR3: 00000001319b8005 CR4: 00000000001706e0 [ 139.449217] Call Trace: [ 139.449224] drm_gem_prime_fd_to_handle+0xff/0x1d0 [drm] [ 139.449274] ? drm_prime_destroy_file_private+0x20/0x20 [drm] [ 139.449323] drm_ioctl_kernel+0xac/0xf0 [drm] [ 139.449363] drm_ioctl+0x20f/0x3b0 [drm] [ 139.449403] ? drm_prime_destroy_file_private+0x20/0x20 [drm] [ 139.449454] radeon_drm_ioctl+0x49/0x80 [radeon] [ 139.449500] __x64_sys_ioctl+0x84/0xc0 [ 139.449507] do_syscall_64+0x33/0x40 [ 139.449514] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 139.449522] RIP: 0033:0x7f63330fbe6b [ 139.449526] Code: ff ff ff 85 c0 79 8b 49 c7 c4 ff ff ff ff 5b 5d 4c 89 e0 41 5c c3 66 0f 1f 84 00 00 00 00 00 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f 0 ff ff 73 01 c3 48 8b 0d d5 af 0c 00 f7 d8 64 89 01 48 [ 139.449529] RSP: 002b:00007fff1e9c4438 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 139.449534] RAX: ffffffffffffffda RBX: 00007fff1e9c447c RCX: 00007f63330fbe6b [ 139.449537] RDX: 00007fff1e9c447c RSI: 00000000c00c642e RDI: 0000000000000012 [ 139.449539] RBP: 00000000c00c642e R08: 00007fff1e9c4520 R09: 00007f63331c7a60 [ 139.449542] R10: 00007f6329fb9ab0 R11: 0000000000000246 R12: 000055f69810ad40 [ 139.449544] R13: 0000000000000012 R14: 0000000000100000 R15: 00007fff1e9c4c20 [ 139.449549] Modules linked in: 8021q garp mrp bridge stp llc nls_iso8859_1 vfat fat fuse btrfs blake2b_generic xor raid6_pq libcrc32c crypto_user tun i2c_de v it87 hwmon_vid snd_seq snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio sg snd_hda_codec_hdmi virtio_balloon snd_hda_intel virtio_console snd_intel_ dspcfg soundwire_intel virtio_pci soundwire_generic_allocation soundwire_cadence virtio_blk snd_hda_codec intel_rapl_msr btusb intel_rapl_common virtio_net btr tl net_failover uvcvideo snd_usb_audio snd_hda_core btbcm x86_pkg_temp_thermal failover soundwire_bus btintel intel_powerclamp snd_soc_core coretemp snd_usbmid i_lib iTCO_wdt videobuf2_vmalloc bluetooth intel_pmc_bxt snd_hwdep kvm_intel videobuf2_memops snd_rawmidi snd_compress videobuf2_v4l2 ac97_bus snd_pcm_dmaengin e iTCO_vendor_support crct10dif_pclmul at24 crc32_pclmul videobuf2_common snd_seq_device mei_hdcp snd_pcm ghash_clmulni_intel kvm videodev aesni_intel crypto_s imd snd_timer snd cryptd mc ecdh_generic [ 139.449642] glue_helper rfkill soundcore joydev mousedev rapl ecc intel_cstate r8169 i2c_i801 intel_uncore atl1c realtek irqbypass mdio_devres mei_me libph y i2c_smbus mei mac_hid lpc_ich ext4 crc32c_generic crc16 mbcache jbd2 dm_mod ata_generic pata_acpi uas usb_storage sr_mod crc32c_intel serio_raw cdrom xhci_pc i pata_jmicron xhci_pci_renesas radeon usbhid i915 intel_gtt nouveau mxm_wmi wmi video i2c_algo_bit drm_ttm_helper ttm drm_kms_helper syscopyarea sysfillrect s ysimgblt fb_sys_fops cec drm agpgart [ 139.449707] CR2: 0000000000000008 [ 139.449710] ---[ end trace f5ce5774498d18e1 ]--- Signed-off-by: Pavel Turinský <ledoian(a)kam.mff.cuni.cz> Fixes: d693def4fd1c ("drm: Remove obsolete GEM and PRIME callbacks from struct drm_driver") Cc: stable(a)vger.kernel.org --- This is a very symptomatic patch around issue I ran into. I do not know if the funcs property should ever be NULL. I basically restored all the checks that were removed in the mentioned commit. Unfortunately, I do not understand drm nor will I have time to delve into it in forseeable future. drivers/gpu/drm/drm_gem.c | 20 ++++++++++---------- drivers/gpu/drm/drm_prime.c | 2 +- 2 files changed, 11 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/drm_gem.c b/drivers/gpu/drm/drm_gem.c index 92f89cee213e..451f290c737c 100644 --- a/drivers/gpu/drm/drm_gem.c +++ b/drivers/gpu/drm/drm_gem.c @@ -249,7 +249,7 @@ drm_gem_object_release_handle(int id, void *ptr, void *data) struct drm_file *file_priv = data; struct drm_gem_object *obj = ptr; - if (obj->funcs->close) + if (obj->funcs && obj->funcs->close) obj->funcs->close(obj, file_priv); drm_gem_remove_prime_handles(obj, file_priv); @@ -401,7 +401,7 @@ drm_gem_handle_create_tail(struct drm_file *file_priv, if (ret) goto err_remove; - if (obj->funcs->open) { + if (obj->funcs && obj->funcs->open) { ret = obj->funcs->open(obj, file_priv); if (ret) goto err_revoke; @@ -977,7 +977,7 @@ drm_gem_object_free(struct kref *kref) struct drm_gem_object *obj = container_of(kref, struct drm_gem_object, refcount); - if (WARN_ON(!obj->funcs->free)) + if (!obj->funcs || WARN_ON(!obj->funcs->free)) return; obj->funcs->free(obj); @@ -1079,7 +1079,7 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size, vma->vm_private_data = obj; - if (obj->funcs->mmap) { + if (obj->funcs && obj->funcs->mmap) { ret = obj->funcs->mmap(obj, vma); if (ret) { drm_gem_object_put(obj); @@ -1087,7 +1087,7 @@ int drm_gem_mmap_obj(struct drm_gem_object *obj, unsigned long obj_size, } WARN_ON(!(vma->vm_flags & VM_DONTEXPAND)); } else { - if (obj->funcs->vm_ops) + if (obj->funcs && obj->funcs->vm_ops) vma->vm_ops = obj->funcs->vm_ops; else { drm_gem_object_put(obj); @@ -1188,13 +1188,13 @@ void drm_gem_print_info(struct drm_printer *p, unsigned int indent, drm_printf_indent(p, indent, "imported=%s\n", obj->import_attach ? "yes" : "no"); - if (obj->funcs->print_info) + if (obj->funcs && obj->funcs->print_info) obj->funcs->print_info(p, indent, obj); } int drm_gem_pin(struct drm_gem_object *obj) { - if (obj->funcs->pin) + if (obj->funcs && obj->funcs->pin) return obj->funcs->pin(obj); else return 0; @@ -1202,7 +1202,7 @@ int drm_gem_pin(struct drm_gem_object *obj) void drm_gem_unpin(struct drm_gem_object *obj) { - if (obj->funcs->unpin) + if (obj->funcs && obj->funcs->unpin) obj->funcs->unpin(obj); } @@ -1210,7 +1210,7 @@ int drm_gem_vmap(struct drm_gem_object *obj, struct dma_buf_map *map) { int ret; - if (!obj->funcs->vmap) + if (!obj->funcs || !obj->funcs->vmap) return -EOPNOTSUPP; ret = obj->funcs->vmap(obj, map); @@ -1227,7 +1227,7 @@ void drm_gem_vunmap(struct drm_gem_object *obj, struct dma_buf_map *map) if (dma_buf_map_is_null(map)) return; - if (obj->funcs->vunmap) + if (obj->funcs && obj->funcs->vunmap) obj->funcs->vunmap(obj, map); /* Always set the mapping to NULL. Callers may rely on this. */ diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 7db55fce35d8..1566dcf417e2 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -620,7 +620,7 @@ struct sg_table *drm_gem_map_dma_buf(struct dma_buf_attachment *attach, if (WARN_ON(dir == DMA_NONE)) return ERR_PTR(-EINVAL); - if (WARN_ON(!obj->funcs->get_sg_table)) + if (!obj->funcs || WARN_ON(!obj->funcs->get_sg_table)) return ERR_PTR(-ENOSYS); sgt = obj->funcs->get_sg_table(obj); -- 2.20.1

3 years, 1 month

5
6
0 0

[PATCH v2 4.19 0/6] close udev startup race condition for several devices

by Jeffle Xu

Please refer to v1 ([1]) and background ([2]) for more details. As Sasha suggested in [3], revert commit 9e07f4e24379 ("zram: close udev startup race condition as default groups") first, and then apply the original patch set. - patch 5: fix the issue of zram that the original commit (9e07f4e24379) wants to fix - patch 6: fix the issue of virtio-blk ([2]) - patch 3/4: I have not occured with these two issues in real world. Put here just for completeness. This patch set is for 4.19, though it shall be backported to 4.4/4.9/4.14/4.19. Send this patch set out first for more feedbacks. I have only tested the issue of virtio-blk though. [1] https://lore.kernel.org/stable/20210207114656.32141-1-jefflexu@linux.alibab… [2] https://lore.kernel.org/stable/f466aacc-f9ca-49ca-0da8-16dc045c9000@linux.a… [3] https://lore.kernel.org/stable/20210207224612.GY4035784@sasha-vm/ Hannes Reinecke (5): block: genhd: add 'groups' argument to device_add_disk nvme: register ns_id attributes as default sysfs groups aoe: register default groups with device_add_disk() zram: register default groups with device_add_disk() virtio-blk: modernize sysfs attribute creation Jeffle Xu (1): Revert "zram: close udev startup race condition as default groups" arch/um/drivers/ubd_kern.c | 2 +- block/genhd.c | 19 +++-- drivers/block/aoe/aoe.h | 1 - drivers/block/aoe/aoeblk.c | 21 ++---- drivers/block/aoe/aoedev.c | 1 - drivers/block/floppy.c | 2 +- drivers/block/mtip32xx/mtip32xx.c | 2 +- drivers/block/ps3disk.c | 2 +- drivers/block/ps3vram.c | 2 +- drivers/block/rsxx/dev.c | 2 +- drivers/block/skd_main.c | 2 +- drivers/block/sunvdc.c | 2 +- drivers/block/virtio_blk.c | 68 ++++++++++-------- drivers/block/xen-blkfront.c | 2 +- drivers/block/zram/zram_drv.c | 4 +- drivers/ide/ide-cd.c | 2 +- drivers/ide/ide-gd.c | 2 +- drivers/memstick/core/ms_block.c | 2 +- drivers/memstick/core/mspro_block.c | 2 +- drivers/mmc/core/block.c | 2 +- drivers/mtd/mtd_blkdevs.c | 2 +- drivers/nvdimm/blk.c | 2 +- drivers/nvdimm/btt.c | 2 +- drivers/nvdimm/pmem.c | 2 +- drivers/nvme/host/core.c | 21 +++--- drivers/nvme/host/lightnvm.c | 105 ++++++++++++---------------- drivers/nvme/host/multipath.c | 15 ++-- drivers/nvme/host/nvme.h | 10 +-- drivers/s390/block/dasd_genhd.c | 2 +- drivers/s390/block/dcssblk.c | 2 +- drivers/s390/block/scm_blk.c | 2 +- drivers/scsi/sd.c | 2 +- drivers/scsi/sr.c | 2 +- include/linux/genhd.h | 5 +- 34 files changed, 147 insertions(+), 169 deletions(-) -- 2.27.0

3 years, 1 month

2
7
0 0

[PATCH AUTOSEL 5.11 01/67] ath10k: prevent deinitializing NAPI twice

by Sasha Levin

From: Wen Gong <wgong(a)codeaurora.org> [ Upstream commit e2f8b74e58cb1560c1399ba94a470b770e858259 ] It happened "Kernel panic - not syncing: hung_task: blocked tasks" when test simulate crash and ifconfig down/rmmod meanwhile. Test steps: 1.Test commands, either can reproduce the hang for PCIe, SDIO and SNOC. echo soft > /sys/kernel/debug/ieee80211/phy0/ath10k/simulate_fw_crash;sleep 0.05;ifconfig wlan0 down echo soft > /sys/kernel/debug/ieee80211/phy0/ath10k/simulate_fw_crash;rmmod ath10k_sdio echo hw-restart > /sys/kernel/debug/ieee80211/phy0/ath10k/simulate_fw_crash;rmmod ath10k_pci 2. dmesg: [ 5622.548630] ath10k_sdio mmc1:0001:1: simulating soft firmware crash [ 5622.655995] ieee80211 phy0: Hardware restart was requested [ 5776.355164] INFO: task shill:1572 blocked for more than 122 seconds. [ 5776.355687] INFO: task kworker/1:2:24437 blocked for more than 122 seconds. [ 5776.359812] Kernel panic - not syncing: hung_task: blocked tasks [ 5776.359836] CPU: 1 PID: 55 Comm: khungtaskd Tainted: G W 4.19.86 #137 [ 5776.359846] Hardware name: MediaTek krane sku176 board (DT) [ 5776.359855] Call trace: [ 5776.359868] dump_backtrace+0x0/0x170 [ 5776.359881] show_stack+0x20/0x2c [ 5776.359896] dump_stack+0xd4/0x10c [ 5776.359916] panic+0x12c/0x29c [ 5776.359937] hung_task_panic+0x0/0x50 [ 5776.359953] kthread+0x120/0x130 [ 5776.359965] ret_from_fork+0x10/0x18 [ 5776.359986] SMP: stopping secondary CPUs [ 5776.360012] Kernel Offset: 0x141ea00000 from 0xffffff8008000000 [ 5776.360026] CPU features: 0x0,2188200c [ 5776.360035] Memory Limit: none command "ifconfig wlan0 down" or "rmmod ath10k_sdio" will be blocked callstack of ifconfig: [<0>] __switch_to+0x120/0x13c [<0>] msleep+0x28/0x38 [<0>] ath10k_sdio_hif_stop+0x24c/0x294 [ath10k_sdio] [<0>] ath10k_core_stop+0x50/0x78 [ath10k_core] [<0>] ath10k_halt+0x120/0x178 [ath10k_core] [<0>] ath10k_stop+0x4c/0x8c [ath10k_core] [<0>] drv_stop+0xe0/0x1e4 [mac80211] [<0>] ieee80211_stop_device+0x48/0x54 [mac80211] [<0>] ieee80211_do_stop+0x678/0x6f8 [mac80211] [<0>] ieee80211_stop+0x20/0x30 [mac80211] [<0>] __dev_close_many+0xb8/0x11c [<0>] __dev_change_flags+0xe0/0x1d0 [<0>] dev_change_flags+0x30/0x6c [<0>] devinet_ioctl+0x370/0x564 [<0>] inet_ioctl+0xdc/0x304 [<0>] sock_do_ioctl+0x50/0x288 [<0>] compat_sock_ioctl+0x1b4/0x1aac [<0>] __se_compat_sys_ioctl+0x100/0x26fc [<0>] __arm64_compat_sys_ioctl+0x20/0x2c [<0>] el0_svc_common+0xa4/0x154 [<0>] el0_svc_compat_handler+0x2c/0x38 [<0>] el0_svc_compat+0x8/0x18 [<0>] 0xffffffffffffffff callstack of rmmod: [<0>] __switch_to+0x120/0x13c [<0>] msleep+0x28/0x38 [<0>] ath10k_sdio_hif_stop+0x294/0x31c [ath10k_sdio] [<0>] ath10k_core_stop+0x50/0x78 [ath10k_core] [<0>] ath10k_halt+0x120/0x178 [ath10k_core] [<0>] ath10k_stop+0x4c/0x8c [ath10k_core] [<0>] drv_stop+0xe0/0x1e4 [mac80211] [<0>] ieee80211_stop_device+0x48/0x54 [mac80211] [<0>] ieee80211_do_stop+0x678/0x6f8 [mac80211] [<0>] ieee80211_stop+0x20/0x30 [mac80211] [<0>] __dev_close_many+0xb8/0x11c [<0>] dev_close_many+0x70/0x100 [<0>] dev_close+0x4c/0x80 [<0>] cfg80211_shutdown_all_interfaces+0x50/0xcc [cfg80211] [<0>] ieee80211_remove_interfaces+0x58/0x1a0 [mac80211] [<0>] ieee80211_unregister_hw+0x40/0x100 [mac80211] [<0>] ath10k_mac_unregister+0x1c/0x44 [ath10k_core] [<0>] ath10k_core_unregister+0x38/0x7c [ath10k_core] [<0>] ath10k_sdio_remove+0x8c/0xd0 [ath10k_sdio] [<0>] sdio_bus_remove+0x48/0x108 [<0>] device_release_driver_internal+0x138/0x1ec [<0>] driver_detach+0x6c/0xa8 [<0>] bus_remove_driver+0x78/0xa8 [<0>] driver_unregister+0x30/0x50 [<0>] sdio_unregister_driver+0x28/0x34 [<0>] cleanup_module+0x14/0x6bc [ath10k_sdio] [<0>] __arm64_sys_delete_module+0x1e0/0x22c [<0>] el0_svc_common+0xa4/0x154 [<0>] el0_svc_compat_handler+0x2c/0x38 [<0>] el0_svc_compat+0x8/0x18 [<0>] 0xffffffffffffffff SNOC: [ 647.156863] Call trace: [ 647.162166] [<ffffff80080855a4>] __switch_to+0x120/0x13c [ 647.164512] [<ffffff800899d8b8>] __schedule+0x5ec/0x798 [ 647.170062] [<ffffff800899dad8>] schedule+0x74/0x94 [ 647.175050] [<ffffff80089a0848>] schedule_timeout+0x314/0x42c [ 647.179874] [<ffffff80089a0a14>] schedule_timeout_uninterruptible+0x34/0x40 [ 647.185780] [<ffffff80082a494>] msleep+0x28/0x38 [ 647.192546] [<ffffff800117ec4c>] ath10k_snoc_hif_stop+0x4c/0x1e0 [ath10k_snoc] [ 647.197439] [<ffffff80010dfbd8>] ath10k_core_stop+0x50/0x7c [ath10k_core] [ 647.204652] [<ffffff80010c8f48>] ath10k_halt+0x114/0x16c [ath10k_core] [ 647.211420] [<ffffff80010cad68>] ath10k_stop+0x4c/0x88 [ath10k_core] [ 647.217865] [<ffffff8000fdbf54>] drv_stop+0x110/0x244 [mac80211] [ 647.224367] [<ffffff80010147ac>] ieee80211_stop_device+0x48/0x54 [mac80211] [ 647.230359] [<ffffff8000ff3eec>] ieee80211_do_stop+0x6a4/0x73c [mac80211] [ 647.237033] [<ffffff8000ff4500>] ieee80211_stop+0x20/0x30 [mac80211] [ 647.243942] [<ffffff80087e39b8>] __dev_close_many+0xa0/0xfc [ 647.250435] [<ffffff80087e3888>] dev_close_many+0x70/0x100 [ 647.255651] [<ffffff80087e3a60>] dev_close+0x4c/0x80 [ 647.261244] [<ffffff8000f1ba54>] cfg80211_shutdown_all_interfaces+0x44/0xcc [cfg80211] [ 647.266383] [<ffffff8000ff3fdc>] ieee80211_remove_interfaces+0x58/0x1b4 [mac80211] [ 647.274128] [<ffffff8000fda540>] ieee80211_unregister_hw+0x50/0x120 [mac80211] [ 647.281659] [<ffffff80010ca314>] ath10k_mac_unregister+0x1c/0x44 [ath10k_core] [ 647.288839] [<ffffff80010dfc94>] ath10k_core_unregister+0x48/0x90 [ath10k_core] [ 647.296027] [<ffffff800117e598>] ath10k_snoc_remove+0x5c/0x150 [ath10k_snoc] [ 647.303229] [<ffffff80085625fc>] platform_drv_remove+0x28/0x50 [ 647.310517] [<ffffff80085601a4>] device_release_driver_internal+0x114/0x1b8 [ 647.316257] [<ffffff80085602e4>] driver_detach+0x6c/0xa8 [ 647.323021] [<ffffff800855e5b8>] bus_remove_driver+0x78/0xa8 [ 647.328571] [<ffffff800856107c>] driver_unregister+0x30/0x50 [ 647.334213] [<ffffff8008562674>] platform_driver_unregister+0x1c/0x28 [ 647.339876] [<ffffff800117fefc>] cleanup_module+0x1c/0x120 [ath10k_snoc] [ 647.346196] [<ffffff8008143ab8>] SyS_delete_module+0x1dc/0x22c PCIe: [ 615.392770] rmmod D 0 3523 3458 0x00000080 [ 615.392777] Call Trace: [ 615.392784] __schedule+0x617/0x7d3 [ 615.392791] ? __mod_timer+0x263/0x35c [ 615.392797] schedule+0x62/0x72 [ 615.392803] schedule_timeout+0x8d/0xf3 [ 615.392809] ? run_local_timers+0x6b/0x6b [ 615.392814] msleep+0x1b/0x22 [ 615.392824] ath10k_pci_hif_stop+0x68/0xd6 [ath10k_pci] [ 615.392844] ath10k_core_stop+0x44/0x67 [ath10k_core] [ 615.392859] ath10k_halt+0x102/0x153 [ath10k_core] [ 615.392873] ath10k_stop+0x38/0x75 [ath10k_core] [ 615.392893] drv_stop+0x9a/0x13c [mac80211] [ 615.392915] ieee80211_do_stop+0x772/0x7cd [mac80211] [ 615.392937] ieee80211_stop+0x1a/0x1e [mac80211] [ 615.392945] __dev_close_many+0x9e/0xf0 [ 615.392952] dev_close_many+0x62/0xe8 [ 615.392958] dev_close+0x54/0x7d [ 615.392975] cfg80211_shutdown_all_interfaces+0x6e/0xa5 [cfg80211] [ 615.393021] ieee80211_remove_interfaces+0x52/0x1aa [mac80211] [ 615.393049] ieee80211_unregister_hw+0x54/0x136 [mac80211] [ 615.393068] ath10k_mac_unregister+0x19/0x4a [ath10k_core] [ 615.393091] ath10k_core_unregister+0x39/0x7e [ath10k_core] [ 615.393104] ath10k_pci_remove+0x3d/0x7f [ath10k_pci] [ 615.393117] pci_device_remove+0x41/0xa6 [ 615.393129] device_release_driver_internal+0x123/0x1ec [ 615.393140] driver_detach+0x60/0x90 [ 615.393152] bus_remove_driver+0x72/0x9f [ 615.393164] pci_unregister_driver+0x1e/0x87 [ 615.393177] SyS_delete_module+0x1d7/0x277 [ 615.393188] do_syscall_64+0x6b/0xf7 [ 615.393199] entry_SYSCALL_64_after_hwframe+0x41/0xa6 The test command run simulate_fw_crash firstly and it call into ath10k_sdio_hif_stop from ath10k_core_restart, then napi_disable is called and bit NAPI_STATE_SCHED is set. After that, function ath10k_sdio_hif_stop is called again from ath10k_stop by command "ifconfig wlan0 down" or "rmmod ath10k_sdio", then command blocked. It is blocked by napi_synchronize, napi_disable will set bit with NAPI_STATE_SCHED, and then napi_synchronize will enter dead loop becuase bit NAPI_STATE_SCHED is set by napi_disable. function of napi_synchronize static inline void napi_synchronize(const struct napi_struct *n) { if (IS_ENABLED(CONFIG_SMP)) while (test_bit(NAPI_STATE_SCHED, &n->state)) msleep(1); else barrier(); } function of napi_disable void napi_disable(struct napi_struct *n) { might_sleep(); set_bit(NAPI_STATE_DISABLE, &n->state); while (test_and_set_bit(NAPI_STATE_SCHED, &n->state)) msleep(1); while (test_and_set_bit(NAPI_STATE_NPSVC, &n->state)) msleep(1); hrtimer_cancel(&n->timer); clear_bit(NAPI_STATE_DISABLE, &n->state); } Add flag for it avoid the hang and crash. Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049 Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00110-QCARMSWP-1 Tested-on: WCN3990 hw1.0 SNOC hw1.0 WLAN.HL.3.1-01307.1-QCAHLSWMTPL-2 Signed-off-by: Wen Gong <wgong(a)codeaurora.org> Signed-off-by: Kalle Valo <kvalo(a)codeaurora.org> Link: https://lore.kernel.org/r/1598617348-2325-1-git-send-email-wgong@codeaurora… Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/net/wireless/ath/ath10k/ahb.c | 5 ++--- drivers/net/wireless/ath/ath10k/core.c | 25 +++++++++++++++++++++++++ drivers/net/wireless/ath/ath10k/core.h | 5 +++++ drivers/net/wireless/ath/ath10k/pci.c | 7 ++++--- drivers/net/wireless/ath/ath10k/sdio.c | 5 ++--- drivers/net/wireless/ath/ath10k/snoc.c | 6 +++--- 6 files changed, 41 insertions(+), 12 deletions(-) diff --git a/drivers/net/wireless/ath/ath10k/ahb.c b/drivers/net/wireless/ath/ath10k/ahb.c index 05a61975c83f4..869524852fbaa 100644 --- a/drivers/net/wireless/ath/ath10k/ahb.c +++ b/drivers/net/wireless/ath/ath10k/ahb.c @@ -626,7 +626,7 @@ static int ath10k_ahb_hif_start(struct ath10k *ar) { ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot ahb hif start\n"); - napi_enable(&ar->napi); + ath10k_core_napi_enable(ar); ath10k_ce_enable_interrupts(ar); ath10k_pci_enable_legacy_irq(ar); @@ -644,8 +644,7 @@ static void ath10k_ahb_hif_stop(struct ath10k *ar) ath10k_ahb_irq_disable(ar); synchronize_irq(ar_ahb->irq); - napi_synchronize(&ar->napi); - napi_disable(&ar->napi); + ath10k_core_napi_sync_disable(ar); ath10k_pci_flush(ar); } diff --git a/drivers/net/wireless/ath/ath10k/core.c b/drivers/net/wireless/ath/ath10k/core.c index eeb6ff6aa2e1e..a419ec7130f97 100644 --- a/drivers/net/wireless/ath/ath10k/core.c +++ b/drivers/net/wireless/ath/ath10k/core.c @@ -2305,6 +2305,31 @@ void ath10k_core_start_recovery(struct ath10k *ar) } EXPORT_SYMBOL(ath10k_core_start_recovery); +void ath10k_core_napi_enable(struct ath10k *ar) +{ + lockdep_assert_held(&ar->conf_mutex); + + if (test_bit(ATH10K_FLAG_NAPI_ENABLED, &ar->dev_flags)) + return; + + napi_enable(&ar->napi); + set_bit(ATH10K_FLAG_NAPI_ENABLED, &ar->dev_flags); +} +EXPORT_SYMBOL(ath10k_core_napi_enable); + +void ath10k_core_napi_sync_disable(struct ath10k *ar) +{ + lockdep_assert_held(&ar->conf_mutex); + + if (!test_bit(ATH10K_FLAG_NAPI_ENABLED, &ar->dev_flags)) + return; + + napi_synchronize(&ar->napi); + napi_disable(&ar->napi); + clear_bit(ATH10K_FLAG_NAPI_ENABLED, &ar->dev_flags); +} +EXPORT_SYMBOL(ath10k_core_napi_sync_disable); + static void ath10k_core_restart(struct work_struct *work) { struct ath10k *ar = container_of(work, struct ath10k, restart_work); diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index 51f7e960e2977..f4be6bfb25392 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -868,6 +868,9 @@ enum ath10k_dev_flags { /* Indicates that ath10k device is during recovery process and not complete */ ATH10K_FLAG_RESTARTING, + + /* protected by conf_mutex */ + ATH10K_FLAG_NAPI_ENABLED, }; enum ath10k_cal_mode { @@ -1308,6 +1311,8 @@ static inline bool ath10k_peer_stats_enabled(struct ath10k *ar) extern unsigned long ath10k_coredump_mask; +void ath10k_core_napi_sync_disable(struct ath10k *ar); +void ath10k_core_napi_enable(struct ath10k *ar); struct ath10k *ath10k_core_create(size_t priv_size, struct device *dev, enum ath10k_bus bus, enum ath10k_hw_rev hw_rev, diff --git a/drivers/net/wireless/ath/ath10k/pci.c b/drivers/net/wireless/ath/ath10k/pci.c index 2328df09875ce..e7fde635e0eef 100644 --- a/drivers/net/wireless/ath/ath10k/pci.c +++ b/drivers/net/wireless/ath/ath10k/pci.c @@ -1958,7 +1958,7 @@ static int ath10k_pci_hif_start(struct ath10k *ar) ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif start\n"); - napi_enable(&ar->napi); + ath10k_core_napi_enable(ar); ath10k_pci_irq_enable(ar); ath10k_pci_rx_post(ar); @@ -2075,8 +2075,9 @@ static void ath10k_pci_hif_stop(struct ath10k *ar) ath10k_pci_irq_disable(ar); ath10k_pci_irq_sync(ar); - napi_synchronize(&ar->napi); - napi_disable(&ar->napi); + + ath10k_core_napi_sync_disable(ar); + cancel_work_sync(&ar_pci->dump_work); /* Most likely the device has HTT Rx ring configured. The only way to diff --git a/drivers/net/wireless/ath/ath10k/sdio.c b/drivers/net/wireless/ath/ath10k/sdio.c index c415090d1f37c..b746052737e0b 100644 --- a/drivers/net/wireless/ath/ath10k/sdio.c +++ b/drivers/net/wireless/ath/ath10k/sdio.c @@ -1859,7 +1859,7 @@ static int ath10k_sdio_hif_start(struct ath10k *ar) struct ath10k_sdio *ar_sdio = ath10k_sdio_priv(ar); int ret; - napi_enable(&ar->napi); + ath10k_core_napi_enable(ar); /* Sleep 20 ms before HIF interrupts are disabled. * This will give target plenty of time to process the BMI done @@ -1992,8 +1992,7 @@ static void ath10k_sdio_hif_stop(struct ath10k *ar) spin_unlock_bh(&ar_sdio->wr_async_lock); - napi_synchronize(&ar->napi); - napi_disable(&ar->napi); + ath10k_core_napi_sync_disable(ar); } #ifdef CONFIG_PM diff --git a/drivers/net/wireless/ath/ath10k/snoc.c b/drivers/net/wireless/ath/ath10k/snoc.c index bf9a8cb713dc0..2c2df0b8b3fd9 100644 --- a/drivers/net/wireless/ath/ath10k/snoc.c +++ b/drivers/net/wireless/ath/ath10k/snoc.c @@ -915,8 +915,7 @@ static void ath10k_snoc_hif_stop(struct ath10k *ar) if (!test_bit(ATH10K_FLAG_CRASH_FLUSH, &ar->dev_flags)) ath10k_snoc_irq_disable(ar); - napi_synchronize(&ar->napi); - napi_disable(&ar->napi); + ath10k_core_napi_sync_disable(ar); ath10k_snoc_buffer_cleanup(ar); ath10k_dbg(ar, ATH10K_DBG_BOOT, "boot hif stop\n"); } @@ -926,7 +925,8 @@ static int ath10k_snoc_hif_start(struct ath10k *ar) struct ath10k_snoc *ar_snoc = ath10k_snoc_priv(ar); bitmap_clear(ar_snoc->pending_ce_irqs, 0, CE_COUNT_MAX); - napi_enable(&ar->napi); + + ath10k_core_napi_enable(ar); ath10k_snoc_irq_enable(ar); ath10k_snoc_rx_post(ar); -- 2.27.0

3 years, 1 month

5
79
0 0

[PATCH v3 0/8] xen/events: bug fixes and some diagnostic aids

by Juergen Gross

The first four patches are fixes for XSA-332. The avoid WARN splats and a performance issue with interdomain events. Patches 5 and 6 are some additions to event handling in order to add some per pv-device statistics to sysfs and the ability to have a per backend device spurious event delay control. Patches 7 and 8 are minor fixes I had lying around. Juergen Gross (8): xen/events: reset affinity of 2-level event when tearing it down xen/events: don't unmask an event channel when an eoi is pending xen/events: avoid handling the same event on two cpus at the same time xen/netback: fix spurious event detection for common event case xen/events: link interdomain events to associated xenbus device xen/events: add per-xenbus device event statistics and settings xen/evtchn: use smp barriers for user event ring xen/evtchn: use READ/WRITE_ONCE() for accessing ring indices .../ABI/testing/sysfs-devices-xenbus | 41 ++++ drivers/block/xen-blkback/xenbus.c | 2 +- drivers/net/xen-netback/interface.c | 24 ++- drivers/xen/events/events_2l.c | 22 +- drivers/xen/events/events_base.c | 199 +++++++++++++----- drivers/xen/events/events_fifo.c | 7 - drivers/xen/events/events_internal.h | 14 +- drivers/xen/evtchn.c | 29 ++- drivers/xen/pvcalls-back.c | 4 +- drivers/xen/xen-pciback/xenbus.c | 2 +- drivers/xen/xen-scsiback.c | 2 +- drivers/xen/xenbus/xenbus_probe.c | 66 ++++++ include/xen/events.h | 7 +- include/xen/xenbus.h | 7 + 14 files changed, 327 insertions(+), 99 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-devices-xenbus -- 2.26.2

3 years, 1 month

5
10
0 0

[PATCH v3 0/2] TPM fixes

by Lino Sanfilippo

Changes in v3 - drop the patch that introduces the new function tpm_chip_free() - rework the commit messages for the patches (style, typos, etc.) - add fixes tag to patch 2 - add James Bottomley to cc list - add stable mailing list to cc list Changes in v2: - drop the patch that erroneously cleaned up after failed installation of an action handler in tpmm_chip_alloc() (pointed out by Jarkko Sakkinen) - make the commit message for patch 1 more detailed - add fixes tags and kernel logs Lino Sanfilippo (2): tpm: fix reference counting for struct tpm_chip tpm: in tpm2_del_space check if ops pointer is still valid drivers/char/tpm/tpm-chip.c | 18 +++++++++++++++--- drivers/char/tpm/tpm2-space.c | 15 ++++++++++----- drivers/char/tpm/tpm_ftpm_tee.c | 2 ++ drivers/char/tpm/tpm_vtpm_proxy.c | 1 + 4 files changed, 28 insertions(+), 8 deletions(-) -- 2.7.4

3 years, 1 month

7
33
0 0

[PATCH v2] block: Try to handle busy underlying device on discard

by Jan Kara

Commit 384d87ef2c95 ("block: Do not discard buffers under a mounted filesystem") made paths issuing discard or zeroout requests to the underlying device try to grab block device in exclusive mode. If that failed we returned EBUSY to userspace. This however caused unexpected fallout in userspace where e.g. FUSE filesystems issue discard requests from userspace daemons although the device is open exclusively by the kernel. Also shrinking of logical volume by LVM issues discard requests to a device which may be claimed exclusively because there's another LV on the same PV. So to avoid these userspace regressions, fall back to invalidate_inode_pages2_range() instead of returning EBUSY to userspace and return EBUSY only of that call fails as well (meaning that there's indeed someone using the particular device range we are trying to discard). Link: https://bugzilla.kernel.org/show_bug.cgi?id=211167 Fixes: 384d87ef2c95 ("block: Do not discard buffers under a mounted filesystem") CC: stable(a)vger.kernel.org Signed-off-by: Jan Kara <jack(a)suse.cz> --- fs/block_dev.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index 235b5042672e..c33151020bcd 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -118,13 +118,22 @@ int truncate_bdev_range(struct block_device *bdev, fmode_t mode, if (!(mode & FMODE_EXCL)) { int err = bd_prepare_to_claim(bdev, truncate_bdev_range); if (err) - return err; + goto invalidate; } truncate_inode_pages_range(bdev->bd_inode->i_mapping, lstart, lend); if (!(mode & FMODE_EXCL)) bd_abort_claiming(bdev, truncate_bdev_range); return 0; + +invalidate: + /* + * Someone else has handle exclusively open. Try invalidating instead. + * The 'end' argument is inclusive so the rounding is safe. + */ + return invalidate_inode_pages2_range(bdev->bd_inode->i_mapping, + lstart >> PAGE_SHIFT, + lend >> PAGE_SHIFT); } EXPORT_SYMBOL(truncate_bdev_range); -- 2.26.2

3 years, 1 month

3
4
0 0

[PATCH AUTOSEL 5.10 01/56] EDAC/amd64: Do not load on family 0x15, model 0x13

by Sasha Levin

From: Borislav Petkov <bp(a)suse.de> [ Upstream commit 6c13d7ff81e6d2f01f62ccbfa49d1b8d87f274d0 ] Those were only laptops and are very very unlikely to have ECC memory. Currently, when the driver attempts to load, it issues: EDAC amd64: Error: F1 not found: device 0x1601 (broken BIOS?) because the PCI device is the wrong one (it uses the F15h default one). So do not load the driver on them as that is pointless. Reported-by: Don Curtis <bugrprt21882(a)online.de> Signed-off-by: Borislav Petkov <bp(a)suse.de> Tested-by: Don Curtis <bugrprt21882(a)online.de> Link: http://bugzilla.opensuse.org/show_bug.cgi?id=1179763 Link: https://lkml.kernel.org/r/20201218160622.20146-1-bp@alien8.de Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- drivers/edac/amd64_edac.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c index 620f7041db6b5..b36d5879b91e0 100644 --- a/drivers/edac/amd64_edac.c +++ b/drivers/edac/amd64_edac.c @@ -3350,10 +3350,13 @@ static struct amd64_family_type *per_family_init(struct amd64_pvt *pvt) fam_type = &family_types[F15_M60H_CPUS]; pvt->ops = &family_types[F15_M60H_CPUS].ops; break; + /* Richland is only client */ + } else if (pvt->model == 0x13) { + return NULL; + } else { + fam_type = &family_types[F15_CPUS]; + pvt->ops = &family_types[F15_CPUS].ops; } - - fam_type = &family_types[F15_CPUS]; - pvt->ops = &family_types[F15_CPUS].ops; break; case 0x16: @@ -3547,6 +3550,7 @@ static int probe_one_instance(unsigned int nid) pvt->mc_node_id = nid; pvt->F3 = F3; + ret = -ENODEV; fam_type = per_family_init(pvt); if (!fam_type) goto err_enable; -- 2.27.0

3 years, 1 month

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[PATCH] iommu/amd: Fix sleeping in atomic in increase_address_space()

by Andrey Ryabinin

increase_address_space() calls get_zeroed_page(gfp) under spin_lock with disabled interrupts. gfp flags passed to increase_address_space() may allow sleeping, so it comes to this: BUG: sleeping function called from invalid context at mm/page_alloc.c:4342 in_atomic(): 1, irqs_disabled(): 1, pid: 21555, name: epdcbbf1qnhbsd8 Call Trace: dump_stack+0x66/0x8b ___might_sleep+0xec/0x110 __alloc_pages_nodemask+0x104/0x300 get_zeroed_page+0x15/0x40 iommu_map_page+0xdd/0x3e0 amd_iommu_map+0x50/0x70 iommu_map+0x106/0x220 vfio_iommu_type1_ioctl+0x76e/0x950 [vfio_iommu_type1] do_vfs_ioctl+0xa3/0x6f0 ksys_ioctl+0x66/0x70 __x64_sys_ioctl+0x16/0x20 do_syscall_64+0x4e/0x100 entry_SYSCALL_64_after_hwframe+0x44/0xa9 Fix this by moving get_zeroed_page() out of spin_lock/unlock section. Fixes: 754265bcab ("iommu/amd: Fix race in increase_address_space()") Signed-off-by: Andrey Ryabinin <arbn(a)yandex-team.com> Cc: <stable(a)vger.kernel.org> --- drivers/iommu/amd/iommu.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index f0adbc48fd17..9256f84f5ebf 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -1502,6 +1502,10 @@ static bool increase_address_space(struct protection_domain *domain, bool ret = true; u64 *pte; + pte = (void *)get_zeroed_page(gfp); + if (!pte) + return false; + spin_lock_irqsave(&domain->lock, flags); amd_iommu_domain_get_pgtable(domain, &pgtable); @@ -1513,10 +1517,6 @@ static bool increase_address_space(struct protection_domain *domain, if (WARN_ON_ONCE(pgtable.mode == PAGE_MODE_6_LEVEL)) goto out; - pte = (void *)get_zeroed_page(gfp); - if (!pte) - goto out; - *pte = PM_LEVEL_PDE(pgtable.mode, iommu_virt_to_phys(pgtable.root)); pgtable.root = pte; @@ -1530,10 +1530,12 @@ static bool increase_address_space(struct protection_domain *domain, */ amd_iommu_domain_set_pgtable(domain, pte, pgtable.mode); + pte = NULL; ret = true; out: spin_unlock_irqrestore(&domain->lock, flags); + free_page((unsigned long)pte); return ret; } -- 2.26.2

3 years, 1 month

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Linux-stable-mirror February 2021