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Filename Latest commit message Latest commit date
Johannes Berg 89d73a97af mac80211: free sta in sta_info_insert_finish() on errors
commit 7bc40aedf24d31d8bea80e1161e996ef4299fb10 upstream.

If sta_info_insert_finish() fails, we currently keep the station
around and free it only in the caller, but there's only one such
caller and it always frees it immediately.

As syzbot found, another consequence of this split is that we can
put things that sleep only into __cleanup_single_sta() and not in
sta_info_free(), but this is the only place that requires such of
sta_info_free() now.

Change this to free the station in sta_info_insert_finish(), in
which case we can still sleep. This will also let us unify the
cleanup code later.

Cc: stable@vger.kernel.org
Fixes: dcd479e10a05 ("mac80211: always wind down STA state")
Reported-by: syzbot+32c6c38c4812d22f2f0b@syzkaller.appspotmail.com
Reported-by: syzbot+4c81fe92e372d26c4246@syzkaller.appspotmail.com
Reported-by: syzbot+6a7fe9faf0d1d61bc24a@syzkaller.appspotmail.com
Reported-by: syzbot+abed06851c5ffe010921@syzkaller.appspotmail.com
Reported-by: syzbot+b7aeb9318541a1c709f1@syzkaller.appspotmail.com
Reported-by: syzbot+d5a9416c6cafe53b5dd0@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/20201112112201.ee6b397b9453.I9c31d667a0ea2151441cc64ed6613d36c18a48e0@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2020-11-24 13:29:23 +01:00
arch xtensa: disable preemption around cache alias management calls 2020-11-24 13:29:23 +01:00
block blk-cgroup: Pre-allocate tree node on blkg_conf_prep 2020-11-10 12:37:30 +01:00
certs
crypto crypto: algif_skcipher - EBUSY on aio should be an error 2020-10-29 09:57:30 +01:00
Documentation xtensa: fix TLBTEMP area placement 2020-11-24 13:29:22 +01:00
drivers regulator: workaround self-referent regulators 2020-11-24 13:29:22 +01:00
fs ext4: fix bogus warning in ext4_update_dx_flag() 2020-11-24 13:29:21 +01:00
include spi: Introduce device-managed SPI controller allocation 2020-11-24 13:29:22 +01:00
init printk: reduce LOG_BUF_SHIFT range for H8300 2020-11-05 11:43:16 +01:00
ipc
kernel fail_function: Remove a redundant mutex unlock 2020-11-24 13:29:18 +01:00
lib random32: make prandom_u32() output unpredictable 2020-11-18 19:20:20 +01:00
LICENSES
mm page_frag: Recover from memory pressure 2020-11-24 13:28:58 +01:00
net mac80211: free sta in sta_info_insert_finish() on errors 2020-11-24 13:29:23 +01:00
samples samples/bpf: Fix possible deadlock in xdpsock 2020-11-05 11:43:17 +01:00
scripts scripts/setlocalversion: make git describe output more reliable 2020-11-01 12:01:01 +01:00
security selinux: Fix error return code in sel_ib_pkey_sid_slow() 2020-11-18 19:20:30 +01:00
sound ALSA: hda/realtek: Add some Clove SSID in the ALC293(ALC1220) 2020-11-24 13:29:20 +01:00
tools selftests/bpf: Fix error return code in run_getsockopt_test() 2020-11-24 13:29:07 +01:00
usr
virt KVM: arm64: ARM_SMCCC_ARCH_WORKAROUND_1 doesn't return SMCCC_RET_NOT_REQUIRED 2020-11-18 19:20:21 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
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COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Documentation/llvm: add documentation on building w/ Clang/LLVM 2020-08-26 10:40:46 +02:00
Makefile Linux 5.4.79 2020-11-22 10:14:12 +01:00
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.