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Kim Phillips 595cb5e0b8 Revert "drm/ast: Add detect function support" This reverts commit `aae74ff9ca`, since it prevents my AMD Milan system from booting, with: [ 27.189558] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 27.197506] #PF: supervisor write access in kernel mode [ 27.203333] #PF: error_code(0x0002) - not-present page [ 27.209064] PGD 0 P4D 0 [ 27.211885] Oops: 0002 [#1] PREEMPT SMP NOPTI [ 27.216744] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.15.0-rc6+ #15 [ 27.223928] Hardware name: AMD Corporation ETHANOL_X/ETHANOL_X, BIOS RXM1006B 08/20/2021 [ 27.232955] RIP: 0010:run_timer_softirq+0x38b/0x4a0 [ 27.238397] Code: 4c 89 f7 e8 37 27 ac 00 49 c7 46 08 00 00 00 00 49 8b 04 24 48 85 c0 74 71 4d 8b 3c 24 4d 89 7e 08 66 90 49 8b 07 49 8b 57 08 <48> 89 02 48 85 c0 74 04 48 89 50 08 49 8b 77 18 41 f6 47 22 20 4c [ 27.259350] RSP: 0018:ffffc42d00003ee8 EFLAGS: 00010086 [ 27.265176] RAX: dead000000000122 RBX: 0000000000000000 RCX: 0000000000000101 [ 27.273134] RDX: 0000000000000000 RSI: 0000000000000087 RDI: 0000000000000001 [ 27.281084] RBP: ffffc42d00003f70 R08: 0000000000000000 R09: 00000000000003eb [ 27.289043] R10: ffffa0860cb300d0 R11: ffffa0c44de290b0 R12: ffffc42d00003ef8 [ 27.297002] R13: 00000000fffef200 R14: ffffa0c44de18dc0 R15: ffffa0867a882350 [ 27.304961] FS: 0000000000000000(0000) GS:ffffa0c44de00000(0000) knlGS:0000000000000000 [ 27.313988] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.320396] CR2: 0000000000000000 CR3: 000000014569c001 CR4: 0000000000770ef0 [ 27.328346] PKRU: 55555554 [ 27.331359] Call Trace: [ 27.334073] <IRQ> [ 27.336314] ? __queue_work+0x420/0x420 [ 27.340589] ? lapic_next_event+0x21/0x30 [ 27.345060] ? clockevents_program_event+0x8f/0xe0 [ 27.350402] __do_softirq+0xfb/0x2db [ 27.354388] irq_exit_rcu+0x98/0xd0 [ 27.358275] sysvec_apic_timer_interrupt+0xac/0xd0 [ 27.363620] </IRQ> [ 27.365955] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 27.371685] RIP: 0010:cpuidle_enter_state+0xcc/0x390 [ 27.377292] Code: 3d 01 79 0a 50 e8 44 ed 77 ff 49 89 c6 0f 1f 44 00 00 31 ff e8 f5 f8 77 ff 80 7d d7 00 0f 85 e6 01 00 00 fb 66 0f 1f 44 00 00 <45> 85 ff 0f 88 17 01 00 00 49 63 c7 4c 2b 75 c8 48 8d 14 40 48 8d [ 27.398243] RSP: 0018:ffffffffb0e03dc8 EFLAGS: 00000246 [ 27.404069] RAX: ffffa0c44de00000 RBX: 0000000000000001 RCX: 000000000000001f [ 27.412028] RDX: 0000000000000000 RSI: ffffffffb0bafc1f RDI: ffffffffb0bbdb81 [ 27.419986] RBP: ffffffffb0e03e00 R08: 00000006549f8f3f R09: ffffffffb1065200 [ 27.427935] R10: ffffa0c44de27ae4 R11: ffffa0c44de27ac4 R12: ffffa0c5634cb000 [ 27.435894] R13: ffffffffb1065200 R14: 00000006549f8f3f R15: 0000000000000001 [ 27.443854] ? cpuidle_enter_state+0xbb/0x390 [ 27.448712] cpuidle_enter+0x2e/0x40 [ 27.452695] call_cpuidle+0x23/0x40 [ 27.456584] do_idle+0x1f0/0x270 [ 27.460181] cpu_startup_entry+0x20/0x30 [ 27.464553] rest_init+0xd4/0xe0 [ 27.468149] arch_call_rest_init+0xe/0x1b [ 27.472619] start_kernel+0x6bc/0x6e2 [ 27.476764] x86_64_start_reservations+0x24/0x26 [ 27.481912] x86_64_start_kernel+0x75/0x79 [ 27.486477] secondary_startup_64_no_verify+0xb0/0xbb [ 27.492111] Modules linked in: kvm_amd(+) kvm ipmi_si(+) ipmi_devintf rapl wmi_bmof ipmi_msghandler input_leds ccp k10temp mac_hid sch_fq_codel msr ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear ast i2c_algo_bit drm_vram_helper drm_ttm_helper ttm drm_kms_helper crct10dif_pclmul crc32_pclmul ghash_clmulni_intel syscopyarea aesni_intel sysfillrect crypto_simd sysimgblt fb_sys_fops cryptd hid_generic cec nvme ahci usbhid drm e1000e nvme_core hid libahci i2c_piix4 wmi [ 27.551789] CR2: 0000000000000000 [ 27.555482] ---[ end trace 897987dfe93dccc6 ]--- [ 27.560630] RIP: 0010:run_timer_softirq+0x38b/0x4a0 [ 27.566069] Code: 4c 89 f7 e8 37 27 ac 00 49 c7 46 08 00 00 00 00 49 8b 04 24 48 85 c0 74 71 4d 8b 3c 24 4d 89 7e 08 66 90 49 8b 07 49 8b 57 08 <48> 89 02 48 85 c0 74 04 48 89 50 08 49 8b 77 18 41 f6 47 22 20 4c [ 27.587021] RSP: 0018:ffffc42d00003ee8 EFLAGS: 00010086 [ 27.592848] RAX: dead000000000122 RBX: 0000000000000000 RCX: 0000000000000101 [ 27.600808] RDX: 0000000000000000 RSI: 0000000000000087 RDI: 0000000000000001 [ 27.608765] RBP: ffffc42d00003f70 R08: 0000000000000000 R09: 00000000000003eb [ 27.616716] R10: ffffa0860cb300d0 R11: ffffa0c44de290b0 R12: ffffc42d00003ef8 [ 27.624673] R13: 00000000fffef200 R14: ffffa0c44de18dc0 R15: ffffa0867a882350 [ 27.632624] FS: 0000000000000000(0000) GS:ffffa0c44de00000(0000) knlGS:0000000000000000 [ 27.641650] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 27.648159] CR2: 0000000000000000 CR3: 000000014569c001 CR4: 0000000000770ef0 [ 27.656119] PKRU: 55555554 [ 27.659133] Kernel panic - not syncing: Fatal exception in interrupt [ 29.030411] Shutting down cpus with NMI [ 29.034699] Kernel Offset: 0x2e600000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) [ 29.046790] ---[ end Kernel panic - not syncing: Fatal exception in interrupt ]--- Since unreliable, found by bisecting for KASAN's use-after-free in enqueue_timer+0x4f/0x1e0, where the timer callback is called. Reported-by: Kim Phillips <kim.phillips@amd.com> Signed-off-by: Kim Phillips <kim.phillips@amd.com> Fixes: `aae74ff9ca` ("drm/ast: Add detect function support") Link: https://lore.kernel.org/lkml/0f7871be-9ca6-5ae4-3a40-5db9a8fb2365@amd.com/ Cc: Ainux <ainux.wang@gmail.com> Cc: Thomas Zimmermann <tzimmermann@suse.de> Cc: David Airlie <airlied@redhat.com> Cc: David Airlie <airlied@linux.ie> Cc: Daniel Vetter <daniel@ffwll.ch> Cc: sterlingteng@gmail.com Cc: chenhuacai@kernel.org Cc: Chuck Lever III <chuck.lever@oracle.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Borislav Petkov <bp@suse.de> Cc: Jon Grimm <jon.grimm@amd.com> Cc: dri-devel <dri-devel@lists.freedesktop.org> Cc: linux-kernel <linux-kernel@vger.kernel.org> Signed-off-by: Dave Airlie <airlied@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20211021153006.92983-1-kim.phillips@amd.com		2021-10-22 05:52:12 +10:00
arch	powerpc fixes for 5.15 #4	2021-10-17 18:01:32 -10:00
block	block-5.15-2021-10-17	2021-10-17 19:25:20 -10:00
certs	certs: Add support for using elliptic curve keys for signing modules	2021-08-23 19:55:42 +03:00
crypto	Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6	2021-08-30 12:57:10 -07:00
Documentation	virtio,vdpa: fixes	2021-10-17 18:17:19 -10:00
drivers	Revert "drm/ast: Add detect function support"	2021-10-22 05:52:12 +10:00
fs	io_uring-5.15-2021-10-17	2021-10-17 19:20:13 -10:00
include	block-5.15-2021-10-17	2021-10-17 19:25:20 -10:00
init	bootconfig: init: Fix memblock leak in xbc_make_cmdline()	2021-10-10 22:27:40 -04:00
ipc	ipc: remove memcg accounting for sops objects in do_semtimedop()	2021-09-14 10:22:11 -07:00
kernel	Tracing fixes for 5.15:	2021-10-16 10:51:41 -07:00
lib	linux-kselftest-kunit-fixes-5.15-rc6	2021-10-11 17:25:08 -07:00
LICENSES	LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes"	2021-07-15 06:31:24 -06:00
mm	memblock: exclude NOMAP regions from kmemleak	2021-10-13 08:36:59 +03:00
net	icmp: fix icmp_ext_echo_iio parsing in icmp_build_probe	2021-10-14 07:54:47 -07:00
samples	samples/bpf: Relicense bpf_insn.h as GPL-2.0-only OR BSD-2-Clause	2021-09-29 16:03:55 +02:00
scripts	Tracing fixes for 5.15:	2021-10-16 10:51:41 -07:00
security	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/	2021-10-07 12:44:41 +01:00
sound	ALSA: usb-audio: Add quirk for VF0770	2021-10-12 22:13:11 +02:00
tools	- Update section headers before the respective relocations to not	2021-10-17 17:41:39 -10:00
usr	.gitignore: prefix local generated files with a slash	2021-05-02 00:43:35 +09:00
virt	KVM: Remove tlbs_dirty	2021-09-23 11:01:12 -04:00
.clang-format	clang-format: Update with the latest for_each macro list	2021-05-12 23:32:39 +02:00
.cocciconfig
.get_maintainer.ignore	Opt out of scripts/get_maintainer.pl	2019-05-16 10:53:40 -07:00
.gitattributes	.gitattributes: use 'dts' diff driver for dts files	2019-12-04 19:44:11 -08:00
.gitignore	.gitignore: ignore only top-level modules.builtin	2021-05-02 00:43:35 +09:00
.mailmap	mailmap: update email address of Matthias Fuchs and Thomas Körper	2021-08-19 09:39:44 +02:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Daniel Drake to credits	2021-09-21 08:34:58 +03:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	Char/Misc driver fixes for 5.15-rc6	2021-10-17 17:14:00 -10:00
Makefile	Linux 5.15-rc6	2021-10-17 20:00:13 -10:00
README	Drop all 00-INDEX files from Documentation/	2018-09-09 15:08:58 -06:00

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.