linux

mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-14 05:55:17 +00:00

No description

C 96.9%
Assembly 0.9%
Rust 0.6%
Shell 0.6%
Python 0.5%
Other 0.3%

Find a file

Vivek Kasireddy f2f6ea1a8d udmabuf: Set the DMA mask for the udmabuf device (v2) commit `9e9fa6a919` upstream. If the DMA mask is not set explicitly, the following warning occurs when the userspace tries to access the dma-buf via the CPU as reported by syzbot here: WARNING: CPU: 1 PID: 3595 at kernel/dma/mapping.c:188 __dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188 Modules linked in: CPU: 0 PID: 3595 Comm: syz-executor249 Not tainted 5.17.0-rc2-syzkaller-00316-g0457e5153e0e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__dma_map_sg_attrs+0x181/0x1f0 kernel/dma/mapping.c:188 Code: 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 71 4c 8b 3d c0 83 b5 0d e9 db fe ff ff e8 b6 0f 13 00 0f 0b e8 af 0f 13 00 <0f> 0b 45 31 e4 e9 54 ff ff ff e8 a0 0f 13 00 49 8d 7f 50 48 b8 00 RSP: 0018:ffffc90002a07d68 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff88807e25e2c0 RSI: ffffffff81649e91 RDI: ffff88801b848408 RBP: ffff88801b848000 R08: 0000000000000002 R09: ffff88801d86c74f R10: ffffffff81649d72 R11: 0000000000000001 R12: 0000000000000002 R13: ffff88801d86c680 R14: 0000000000000001 R15: 0000000000000000 FS: 0000555556e30300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000200000cc CR3: 000000001d74a000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dma_map_sgtable+0x70/0xf0 kernel/dma/mapping.c:264 get_sg_table.isra.0+0xe0/0x160 drivers/dma-buf/udmabuf.c:72 begin_cpu_udmabuf+0x130/0x1d0 drivers/dma-buf/udmabuf.c:126 dma_buf_begin_cpu_access+0xfd/0x1d0 drivers/dma-buf/dma-buf.c:1164 dma_buf_ioctl+0x259/0x2b0 drivers/dma-buf/dma-buf.c:363 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f62fcf530f9 Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe3edab9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f62fcf530f9 RDX: 0000000020000200 RSI: 0000000040086200 RDI: 0000000000000006 RBP: 00007f62fcf170e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f62fcf17170 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 </TASK> v2: Dont't forget to deregister if DMA mask setup fails. Reported-by: syzbot+10e27961f4da37c443b2@syzkaller.appspotmail.com Cc: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Link: http://patchwork.freedesktop.org/patch/msgid/20220520205235.3687336-1-vivek.kasireddy@intel.com Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2022-09-05 10:31:27 +02:00
arch	arm64: errata: Add Cortex-A510 to the repeat tlbi list	2022-09-05 10:31:26 +02:00
block	blk-mq: fix io hung due to missing commit_rqs	2022-08-31 17:18:19 +02:00
certs	certs: make system keyring depend on x509 parser	2022-07-24 12:53:55 -07:00
crypto	KEYS: asymmetric: enforce SM2 signature use pkey algo	2022-08-17 15:16:17 +02:00
Documentation	arm64: errata: Add Cortex-A510 to the repeat tlbi list	2022-09-05 10:31:26 +02:00
drivers	udmabuf: Set the DMA mask for the udmabuf device (v2)	2022-09-05 10:31:27 +02:00
fs	ocfs2: fix freeing uninitialized resource on ocfs2_dlm_shutdown	2022-08-31 17:18:16 +02:00
include	scsi: ufs: core: Enable link lost interrupt	2022-08-31 17:18:20 +02:00
init	arm64: fix rodata=full	2022-08-31 17:18:19 +02:00
io_uring	io_uring: fix issue with io_write() not always undoing sb_start_write()	2022-08-31 17:18:17 +02:00
ipc	ipc: Free mq_sysctls if ipc namespace creation failed	2022-06-22 17:47:41 -05:00
kernel	bpf: Don't use tnum_range on array range checking for poke descriptors	2022-08-31 17:18:21 +02:00
lib	crypto: lib - remove unneeded selection of XOR_BLOCKS	2022-09-05 10:31:26 +02:00
LICENSES	LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers	2021-12-16 14:33:10 +01:00
mm	mm/hugetlb: fix hugetlb not supporting softdirty tracking	2022-08-31 17:18:17 +02:00
net	Bluetooth: L2CAP: Fix build errors in some archs	2022-09-05 10:31:27 +02:00
samples	sample: bpf: xdp_router_ipv4: Allow the kernel to send arp requests	2022-08-17 15:14:25 +02:00
scripts	kbuild: dummy-tools: avoid tmpdir leak in dummy gcc	2022-08-29 11:07:58 +02:00
security	apparmor: Fix memleak in aa_simple_write_to_buffer()	2022-08-25 11:45:11 +02:00
sound	Revert "ALSA: hda: Fix page fault in snd_hda_codec_shutdown()"	2022-08-25 11:45:54 +02:00
tools	perf stat: Clear evsel->reset_group for each stat run	2022-08-31 17:18:19 +02:00
usr	Not a lot of material this cycle. Many singleton patches against various	2022-05-27 11:22:03 -07:00
virt	KVM: Unconditionally get a ref to /dev/kvm module when creating a VM	2022-08-25 11:45:05 +02:00
.clang-format	clang-format: Fix space after for_each macros	2022-05-20 19:27:16 +02:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.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	kbuild: split the second line of .mod into .usyms	2022-05-08 03:16:59 +09:00
.mailmap	ARM: SoC fixes for 5.19, part 4	2022-07-27 09:43:07 -07:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: mark ARM/PALM TREO SUPPORT orphan	2022-07-07 15:17:00 +02:00
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	io_uring: move to separate directory	2022-08-17 15:14:20 +02:00
Makefile	Linux 5.19.6	2022-08-31 17:18:21 +02:00
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.