kernel/linux.git/drivers, branch v5.4.50

Revert "tty: hvc: Fix data abort due to race in hvc_open"

2020-06-30T19:37:13+00:00

commit cf9c94456ebafc6d75a834e58dfdc8ae71a3acbc upstream. This reverts commit e2bd1dcbe1aa34ff5570b3427c530e4332ecf0fe. In discussion on the mailing list, it has been determined that this is not the correct type of fix for this issue. Revert it so that we can do this correctly. Reported-by: Jiri Slaby Reported-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20200428032601.22127-1-rananta@codeaurora.org Cc: Raghavendra Rao Ananta Signed-off-by: Greg Kroah-Hartman

dm writecache: add cond_resched to loop in persistent_memory_claim()

2020-06-30T19:37:12+00:00

commit d35bd764e6899a7bea71958f08d16cea5bfa1919 upstream. Add cond_resched() to a loop that fills in the mapper memory area because the loop can be executed many times. Fixes: 48debafe4f2fe ("dm: add writecache target") Cc: stable@vger.kernel.org Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman

dm writecache: correct uncommitted_block when discarding uncommitted entry

2020-06-30T19:37:12+00:00

commit 39495b12ef1cf602e6abd350dce2ef4199906531 upstream. When uncommitted entry has been discarded, correct wc->uncommitted_block for getting the exact number. Fixes: 48debafe4f2fe ("dm: add writecache target") Cc: stable@vger.kernel.org Signed-off-by: Huaisheng Ye Acked-by: Mikulas Patocka Signed-off-by: Mike Snitzer Signed-off-by: Greg Kroah-Hartman

Staging: rtl8723bs: prevent buffer overflow in update_sta_support_rate()

2020-06-30T19:37:11+00:00

commit b65a2d8c8614386f7e8d38ea150749f8a862f431 upstream. The "ie_len" variable is in the 0-255 range and it comes from the network. If it's over NDIS_802_11_LENGTH_RATES_EX (16) then that will lead to memory corruption. Fixes: 554c0a3abf21 ("staging: Add rtl8723bs sdio wifi driver") Signed-off-by: Dan Carpenter Cc: stable Link: https://lore.kernel.org/r/20200603101958.GA1845750@mwanda Signed-off-by: Greg Kroah-Hartman

drm/amdgpu: add fw release for sdma v5_0

2020-06-30T19:37:11+00:00

commit edfaf6fa73f15568d4337f208b2333f647c35810 upstream. sdma fw isn't released when module exit Reviewed-by: Hawking Zhang Signed-off-by: Wenhui Sheng Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

drm/radeon: fix fb_div check in ni_init_smc_spll_table()

2020-06-30T19:37:11+00:00

commit 35f760b44b1b9cb16a306bdcc7220fbbf78c4789 upstream. clk_s is checked twice in a row in ni_init_smc_spll_table(). fb_div should be checked instead. Fixes: 69e0b57a91ad ("drm/radeon/kms: add dpm support for cayman (v5)") Cc: stable@vger.kernel.org Signed-off-by: Denis Efremov Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm: rcar-du: Fix build error

2020-06-30T19:37:11+00:00

commit 5f9af404eec82981c4345c9943be48422234e7ab upstream. Select DRM_KMS_HELPER dependency. Build error when DRM_KMS_HELPER is not selected: drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd48): undefined reference to `drm_atomic_helper_bridge_duplicate_state' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd50): undefined reference to `drm_atomic_helper_bridge_destroy_state' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xd70): undefined reference to `drm_atomic_helper_bridge_reset' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xdc8): undefined reference to `drm_atomic_helper_connector_reset' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xde0): undefined reference to `drm_helper_probe_single_connector_modes' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xe08): undefined reference to `drm_atomic_helper_connector_duplicate_state' drivers/gpu/drm/rcar-du/rcar_lvds.o:(.rodata+0xe10): undefined reference to `drm_atomic_helper_connector_destroy_state' Fixes: c6a27fa41fab ("drm: rcar-du: Convert LVDS encoder code to bridge driver") Cc: Signed-off-by: Daniel Gomez Reviewed-by: Emil Velikov Reviewed-by: Kieran Bingham Reviewed-by: Laurent Pinchart Signed-off-by: Laurent Pinchart Signed-off-by: Greg Kroah-Hartman

drm/amd: fix potential memleak in err branch

2020-06-30T19:37:10+00:00

commit b5b78a6c8d8cb9c307bc6b16a754603424459d6e upstream. The function kobject_init_and_add alloc memory like: kobject_init_and_add->kobject_add_varg->kobject_set_name_vargs ->kvasprintf_const->kstrdup_const->kstrdup->kmalloc_track_caller ->kmalloc_slab, in err branch this memory not free. If use kmemleak, this path maybe catched. These changes are to add kobject_put in kobject_init_and_add failed branch, fix potential memleak. Signed-off-by: Bernard Zhao Reviewed-by: Felix Kuehling Signed-off-by: Felix Kuehling Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Greg Kroah-Hartman

ACPI: configfs: Disallow loading ACPI tables when locked down

2020-06-30T19:37:07+00:00

commit 75b0cea7bf307f362057cc778efe89af4c615354 upstream. Like other vectors already patched, this one here allows the root user to load ACPI tables, which enables arbitrary physical address writes, which in turn makes it possible to disable lockdown. Prevents this by checking the lockdown status before allowing a new ACPI table to be installed. The link in the trailer shows a PoC of how this might be used. Link: https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language-2.sh Cc: 5.4+ # 5.4+ Signed-off-by: Jason A. Donenfeld Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman

ACPI: sysfs: Fix pm_profile_attr type

2020-06-30T19:37:06+00:00

commit e6d701dca9893990d999fd145e3e07223c002b06 upstream. When running a kernel with Clang's Control Flow Integrity implemented, there is a violation that happens when accessing /sys/firmware/acpi/pm_profile: $ cat /sys/firmware/acpi/pm_profile 0 $ dmesg ... [ 17.352564] ------------[ cut here ]------------ [ 17.352568] CFI failure (target: acpi_show_profile+0x0/0x8): [ 17.352572] WARNING: CPU: 3 PID: 497 at kernel/cfi.c:29 __cfi_check_fail+0x33/0x40 [ 17.352573] Modules linked in: [ 17.352575] CPU: 3 PID: 497 Comm: cat Tainted: G W 5.7.0-microsoft-standard+ #1 [ 17.352576] RIP: 0010:__cfi_check_fail+0x33/0x40 [ 17.352577] Code: 48 c7 c7 50 b3 85 84 48 c7 c6 50 0a 4e 84 e8 a4 d8 60 00 85 c0 75 02 5b c3 48 c7 c7 dc 5e 49 84 48 89 de 31 c0 e8 7d 06 eb ff <0f> 0b 5b c3 00 00 cc cc 00 00 cc cc 00 85 f6 74 25 41 b9 ea ff ff [ 17.352577] RSP: 0018:ffffaa6dc3c53d30 EFLAGS: 00010246 [ 17.352578] RAX: 331267e0c06cee00 RBX: ffffffff83d85890 RCX: ffffffff8483a6f8 [ 17.352579] RDX: ffff9cceabbb37c0 RSI: 0000000000000082 RDI: ffffffff84bb9e1c [ 17.352579] RBP: ffffffff845b2bc8 R08: 0000000000000001 R09: ffff9cceabbba200 [ 17.352579] R10: 000000000000019d R11: 0000000000000000 R12: ffff9cc947766f00 [ 17.352580] R13: ffffffff83d6bd50 R14: ffff9ccc6fa80000 R15: ffffffff845bd328 [ 17.352582] FS: 00007fdbc8d13580(0000) GS:ffff9cce91ac0000(0000) knlGS:0000000000000000 [ 17.352582] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 17.352583] CR2: 00007fdbc858e000 CR3: 00000005174d0000 CR4: 0000000000340ea0 [ 17.352584] Call Trace: [ 17.352586] ? rev_id_show+0x8/0x8 [ 17.352587] ? __cfi_check+0x45bac/0x4b640 [ 17.352589] ? kobj_attr_show+0x73/0x80 [ 17.352590] ? sysfs_kf_seq_show+0xc1/0x140 [ 17.352592] ? ext4_seq_options_show.cfi_jt+0x8/0x8 [ 17.352593] ? seq_read+0x180/0x600 [ 17.352595] ? sysfs_create_file_ns.cfi_jt+0x10/0x10 [ 17.352596] ? tlbflush_read_file+0x8/0x8 [ 17.352597] ? __vfs_read+0x6b/0x220 [ 17.352598] ? handle_mm_fault+0xa23/0x11b0 [ 17.352599] ? vfs_read+0xa2/0x130 [ 17.352599] ? ksys_read+0x6a/0xd0 [ 17.352601] ? __do_sys_getpgrp+0x8/0x8 [ 17.352602] ? do_syscall_64+0x72/0x120 [ 17.352603] ? entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 17.352604] ---[ end trace 7b1fa81dc897e419 ]--- When /sys/firmware/acpi/pm_profile is read, sysfs_kf_seq_show is called, which in turn calls kobj_attr_show, which gets the ->show callback member by calling container_of on attr (casting it to struct kobj_attribute) then calls it. There is a CFI violation because pm_profile_attr is of type struct device_attribute but kobj_attr_show calls ->show expecting it to be from struct kobj_attribute. CFI checking ensures that function pointer types match when doing indirect calls. Fix pm_profile_attr to be defined in terms of kobj_attribute so there is no violation or mismatch. Fixes: 362b646062b2 ("ACPI: Export FADT pm_profile integer value to userspace") Link: https://github.com/ClangBuiltLinux/linux/issues/1051 Reported-by: yuu ichii Signed-off-by: Nathan Chancellor Cc: 3.10+ # 3.10+ Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman