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Damien Le Moal 0fcb0b131c scsi: sd: Fix potential NULL pointer dereference 
[ Upstream commit 05fbde3a77 ]

If sd_probe() sees an early error before sdkp->device is initialized,
sd_zbc_release_disk() is called. This causes a NULL pointer dereference
when sd_is_zoned() is called inside that function. Avoid this by removing
the call to sd_zbc_release_disk() in sd_probe() error path.

This change is safe and does not result in zone information memory leakage
because the zone information for a zoned disk is allocated only when
sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set,
resulting in sd_disk_release() being called when needed to cleanup a disk
zone information using sd_zbc_release_disk().

Link: https://lore.kernel.org/r/20220601062544.905141-2-damien.lemoal@opensource.wdc.com
Fixes: 89d9475610 ("sd: Implement support for ZBC devices")
Reported-by: Dongliang Mu <mudongliangabcd@gmail.com>
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Damien Le Moal <damien.lemoal@opensource.wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2022-06-14 18:36:13 +02:00
arch s390/mcck: isolate SIE instruction when setting CIF_MCCK_GUEST flag 2022-06-14 18:36:13 +02:00
block block: make bioset_exit() fully resilient against being called twice 2022-06-14 18:36:11 +02:00
certs certs: Add support for using elliptic curve keys for signing modules 2021-08-23 19:55:42 +03:00
crypto crypto: cryptd - Protect per-CPU resource by disabling BH. 2022-06-09 10:23:11 +02:00
Documentation regulator: mt6315-regulator: fix invalid allowed mode 2022-06-14 18:36:13 +02:00
drivers scsi: sd: Fix potential NULL pointer dereference 2022-06-14 18:36:13 +02:00
fs afs: Fix infinite loop found by xfstest generic/676 2022-06-14 18:36:13 +02:00
include net: sched: add barrier to fix packet stuck problem for lockless qdisc 2022-06-14 18:36:12 +02:00
init Kconfig: Add option for asm goto w/ tied outputs to workaround clang-13 bug 2022-06-09 10:23:26 +02:00
ipc ipc/mqueue: use get_tree_nodev() in mqueue_get_tree() 2022-06-09 10:23:10 +02:00
kernel bpf: Fix probe read error in ___bpf_prog_run() 2022-06-14 18:36:11 +02:00
lib list: test: Add a test for list_is_head() 2022-06-09 10:23:31 +02:00
LICENSES LICENSES/dual/CC-BY-4.0: Git rid of "smart quotes" 2021-07-15 06:31:24 -06:00
mm mm/memremap: fix missing call to untrack_pfn() in pagemap_range() 2022-06-09 10:23:28 +02:00
net tcp: tcp_rtx_synack() can be called from process context 2022-06-14 18:36:12 +02:00
samples samples/landlock: Format with clang-format 2022-06-09 10:23:23 +02:00
scripts modpost: fix removing numeric suffixes 2022-06-14 18:36:10 +02:00
security ima: remove the IMA_TEMPLATE Kconfig option 2022-06-09 10:23:25 +02:00
sound ASoC: fsl_sai: Fix FSL_SAI_xDR/xFR definition 2022-06-14 18:36:09 +02:00
tools selftests/bpf: fix stacktrace_build_id with missing kprobe/urandom_read 2022-06-14 18:36:11 +02:00
usr usr/include/Makefile: add linux/nfc.h to the compile-test coverage 2022-02-01 17:27:15 +01:00
virt KVM: avoid NULL pointer dereference in kvm_dirty_ring_push 2022-04-13 20:59:26 +02:00
.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: add Andrej Shadura 2021-10-18 20:22:03 -10:00
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 MAINTAINERS: add git tree for random.c 2022-05-30 09:28:59 +02:00
Makefile Linux 5.15.46 2022-06-09 10:23:32 +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.