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Filename Latest commit message Latest commit date
Thomas Gleixner 5ffda7f3ed perf/core: Exit early on perf_mmap() fail
commit 07091aade394f690e7b655578140ef84d0e8d7b0 upstream.

When perf_mmap() fails to allocate a buffer, it still invokes the
event_mapped() callback of the related event. On X86 this might increase
the perf_rdpmc_allowed reference counter. But nothing undoes this as
perf_mmap_close() is never called in this case, which causes another
reference count leak.

Return early on failure to prevent that.

Fixes: 1e0fb9ec67 ("perf/core: Add pmu callbacks to track event mapping and unmapping")
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-08-28 16:21:23 +02:00
arch arch: powerpc: defconfig: Drop obsolete CONFIG_NET_CLS_TCINDEX 2025-08-28 16:21:19 +02:00
block
certs
crypto
Documentation scsi: ufs: core: Fix spelling of a sysfs attribute name 2025-07-17 18:24:58 +02:00
drivers pptp: fix pptp_xmit() error path 2025-08-28 16:21:22 +02:00
fs smb: client: let recv_done() cleanup before notifying the callers. 2025-08-28 16:21:22 +02:00
include net: drop UFO packets in udp_rcv_segment() 2025-08-28 16:21:22 +02:00
init bpfilter: match bit size of bpfilter_umh to that of the kernel 2025-07-17 18:24:51 +02:00
ipc
kernel perf/core: Exit early on perf_mmap() fail 2025-08-28 16:21:23 +02:00
lib lib: test_objagg: Set error message in check_expect_hints_stats() 2025-07-17 18:24:56 +02:00
LICENSES
mm
net ipv6: reject malicious packets in ipv6_gso_segment() 2025-08-28 16:21:22 +02:00
samples samples: mei: Fix building on musl libc 2025-08-28 16:21:19 +02:00
scripts kbuild: use -MMD instead of -MD to exclude system headers from dependency 2025-07-17 18:24:51 +02:00
security
sound ASoC: ops: dynamically allocate struct snd_ctl_elem_value 2025-08-28 16:21:18 +02:00
tools perf tests bp_account: Fix leaked file descriptor 2025-08-28 16:21:20 +02:00
usr kbuild: hdrcheck: fix cross build with clang 2025-07-17 18:24:51 +02:00
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile Linux 5.4.296 2025-07-17 18:25:06 +02:00
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.