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Laurentiu Tudor 5bd9dc3e76 bus: fsl-mc: don't assume child devices are all fsl-mc devices
[ Upstream commit 303c9c63abb9390e906052863f82bb4e9824e5c0 ]

Changes in VFIO caused a pseudo-device to be created as child of
fsl-mc devices causing a crash [1] when trying to bind a fsl-mc
device to VFIO. Fix this by checking the device type when enumerating
fsl-mc child devices.

[1]
Modules linked in:
Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
CPU: 6 PID: 1289 Comm: sh Not tainted 6.2.0-rc5-00047-g7c46948a6e9c #2
Hardware name: NXP Layerscape LX2160ARDB (DT)
pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : mc_send_command+0x24/0x1f0
lr : dprc_get_obj_region+0xfc/0x1c0
sp : ffff80000a88b900
x29: ffff80000a88b900 x28: ffff48a9429e1400 x27: 00000000000002b2
x26: ffff48a9429e1718 x25: 0000000000000000 x24: 0000000000000000
x23: ffffd59331ba3918 x22: ffffd59331ba3000 x21: 0000000000000000
x20: ffff80000a88b9b8 x19: 0000000000000000 x18: 0000000000000001
x17: 7270642f636d2d6c x16: 73662e3030303030 x15: ffffffffffffffff
x14: ffffd59330f1d668 x13: ffff48a8727dc389 x12: ffff48a8727dc386
x11: 0000000000000002 x10: 00008ceaf02f35d4 x9 : 0000000000000012
x8 : 0000000000000000 x7 : 0000000000000006 x6 : ffff80000a88bab0
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000a88b9e8
x2 : ffff80000a88b9e8 x1 : 0000000000000000 x0 : ffff48a945142b80
Call trace:
 mc_send_command+0x24/0x1f0
 dprc_get_obj_region+0xfc/0x1c0
 fsl_mc_device_add+0x340/0x590
 fsl_mc_obj_device_add+0xd0/0xf8
 dprc_scan_objects+0x1c4/0x340
 dprc_scan_container+0x38/0x60
 vfio_fsl_mc_probe+0x9c/0xf8
 fsl_mc_driver_probe+0x24/0x70
 really_probe+0xbc/0x2a8
 __driver_probe_device+0x78/0xe0
 device_driver_attach+0x30/0x68
 bind_store+0xa8/0x130
 drv_attr_store+0x24/0x38
 sysfs_kf_write+0x44/0x60
 kernfs_fop_write_iter+0x128/0x1b8
 vfs_write+0x334/0x448
 ksys_write+0x68/0xf0
 __arm64_sys_write+0x1c/0x28
 invoke_syscall+0x44/0x108
 el0_svc_common.constprop.1+0x94/0xf8
 do_el0_svc+0x38/0xb0
 el0_svc+0x20/0x50
 el0t_64_sync_handler+0x98/0xc0
 el0t_64_sync+0x174/0x178
Code: aa0103f4 a9025bf5 d5384100 b9400801 (79401260)
---[ end trace 0000000000000000 ]---

Fixes: 3c28a76124 ("vfio: Add struct device to vfio_device")
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Tested-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Message-ID: <20230613160718.29500-1-laurentiu.tudor@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2023-07-19 16:21:57 +02:00
arch KVM: s390: fix KVM_S390_GET_CMMA_BITS for GFNs in memslot holes 2023-07-19 16:21:55 +02:00
block block: increment diskseq on all media change events 2023-07-19 16:21:47 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: jitter - correct health test during initialization 2023-07-19 16:21:42 +02:00
Documentation lkdtm: replace ll_rw_block with submit_bh 2023-07-19 16:21:53 +02:00
drivers bus: fsl-mc: don't assume child devices are all fsl-mc devices 2023-07-19 16:21:57 +02:00
fs f2fs: fix to avoid NULL pointer dereference f2fs_write_end_io() 2023-07-19 16:21:55 +02:00
include Revert "usb: common: usb-conn-gpio: Set last role to unknown before initial detection" 2023-07-19 16:21:56 +02:00
init gcc: disable '-Warray-bounds' for gcc-13 too 2023-04-26 14:28:43 +02:00
io_uring io_uring/net: use the correct msghdr union member in io_sendmsg_copy_hdr 2023-06-28 11:12:33 +02:00
ipc ipc: fix memory leak in init_mqueue_fs() 2022-12-31 13:32:01 +01:00
kernel kcsan: Don't expect 64 bits atomic builtins from 32 bits architectures 2023-07-19 16:21:37 +02:00
lib lib/ts_bm: reset initial match offset for every block of text 2023-07-19 16:21:13 +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/mmap: Fix VM_LOCKED check in do_vmi_align_munmap() 2023-07-19 16:21:46 +02:00
net SUNRPC: Fix UAF in svc_tcp_listen_data_ready() 2023-07-19 16:21:48 +02:00
rust rust: kernel: Mark rust_fmt_argument as extern "C" 2023-04-26 14:28:38 +02:00
samples samples/bpf: xdp1 and xdp2 reduce XDPBUFSIZE to 60 2023-07-19 16:21:07 +02:00
scripts kbuild: Disable GCOV for *.mod.o 2023-07-19 16:21:44 +02:00
security ima: Fix build warnings 2023-07-19 16:21:03 +02:00
sound ALSA: pcm: Fix potential data race at PCM memory allocation helpers 2023-07-19 16:21:47 +02:00
tools perf tool x86: Fix perf_env memory leak 2023-07-19 16:21:38 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Avoid illegal stage2 mapping on invalid memory slot 2023-06-28 11:12:23 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS smb: move client and server files to common directory fs/smb 2023-06-28 11:12:40 +02:00
Makefile Linux 6.1.38 2023-07-05 18:27:38 +01:00
README

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

There are several guides for kernel developers and users. These guides can
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    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.