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Filename Latest commit message Latest commit date
Owen Gu b00d2572c1 usb: gadget: f_fs: Fix epfile null pointer access after ep enable.
commit cfd6f1a7b42f62523c96d9703ef32b0dbc495ba4 upstream.

A race condition occurs when ffs_func_eps_enable() runs concurrently
with ffs_data_reset(). The ffs_data_clear() called in ffs_data_reset()
sets ffs->epfiles to NULL before resetting ffs->eps_count to 0, leading
to a NULL pointer dereference when accessing epfile->ep in
ffs_func_eps_enable() after successful usb_ep_enable().

The ffs->epfiles pointer is set to NULL in both ffs_data_clear() and
ffs_data_close() functions, and its modification is protected by the
spinlock ffs->eps_lock. And the whole ffs_func_eps_enable() function
is also protected by ffs->eps_lock.

Thus, add NULL pointer handling for ffs->epfiles in the
ffs_func_eps_enable() function to fix issues

Signed-off-by: Owen Gu <guhuinan@xiaomi.com>
Link: https://lore.kernel.org/r/20250915092907.17802-1-guhuinan@xiaomi.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-12-03 12:45:06 +01:00
arch x86/resctrl: Fix miscount of bandwidth event when reactivating previously unavailable RMID 2025-12-03 12:45:05 +01:00
block
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drivers usb: gadget: f_fs: Fix epfile null pointer access after ep enable. 2025-12-03 12:45:06 +01:00
fs btrfs: use smp_mb__after_atomic() when forcing COW in create_pending_snapshot() 2025-12-03 12:45:04 +01:00
include net/sched: sch_qfq: Fix null-deref in agg_dequeue 2025-12-03 12:45:04 +01:00
init
ipc
kernel padata: Reset next CPU when reorder sequence wraps around 2025-10-29 14:00:01 +01:00
lib
LICENSES
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net net/sched: sch_qfq: Fix null-deref in agg_dequeue 2025-12-03 12:45:04 +01:00
samples
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sound ASoC: qdsp6: q6asm: do not sleep while atomic 2025-12-03 12:45:05 +01:00
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Makefile Linux 5.4.301 2025-10-29 14:00:02 +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.