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Theodore Ts'o c5fa4eeddd ext4: fix invalid free tracking in ext4_xattr_move_to_block() 
commit b87c7cdf2b upstream.

In ext4_xattr_move_to_block(), the value of the extended attribute
which we need to move to an external block may be allocated by
kvmalloc() if the value is stored in an external inode.  So at the end
of the function the code tried to check if this was the case by
testing entry->e_value_inum.

However, at this point, the pointer to the xattr entry is no longer
valid, because it was removed from the original location where it had
been stored.  So we could end up calling kvfree() on a pointer which
was not allocated by kvmalloc(); or we could also potentially leak
memory by not freeing the buffer when it should be freed.  Fix this by
storing whether it should be freed in a separate variable.

Cc: stable@kernel.org
Link: https://lore.kernel.org/r/20230430160426.581366-1-tytso@mit.edu
Link: https://syzkaller.appspot.com/bug?id=5c2aee8256e30b55ccf57312c16d88417adbd5e1
Link: https://syzkaller.appspot.com/bug?id=41a6b5d4917c0412eb3b3c3c604965bed7d7420b
Reported-by: syzbot+64b645917ce07d89bde5@syzkaller.appspotmail.com
Reported-by: syzbot+0d042627c4f2ad332195@syzkaller.appspotmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2023-05-17 11:53:59 +02:00
Documentation ASoC: dt-bindings: qcom,lpass-rx-macro: correct minItems for clocks 2023-05-11 23:03:05 +09:00
LICENSES
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arch ARM: dts: aspeed: romed8hm3: Fix GPIO polarity of system-fault LED 2023-05-17 11:53:46 +02:00
block block: Skip destroyed blkg when restart in blkg_destroy_all() 2023-05-17 11:53:33 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: engine - fix crypto_queue backlog handling 2023-05-17 11:53:40 +02:00
drivers drm/amd/display: Change default Z8 watermark values 2023-05-17 11:53:56 +02:00
fs ext4: fix invalid free tracking in ext4_xattr_move_to_block() 2023-05-17 11:53:59 +02:00
include drm/dsc: fix drm_edp_dsc_sink_output_bpp() DPCD high byte usage 2023-05-17 11:53:57 +02:00
init gcc: disable '-Warray-bounds' for gcc-13 too 2023-04-26 14:28:43 +02:00
io_uring io_uring/rsrc: use nospec'ed indexes 2023-05-11 23:03:24 +09:00
ipc
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kernel locking/rwsem: Add __always_inline annotation to __down_read_common() and inlined callers 2023-05-17 11:53:57 +02:00
lib debugobject: Ensure pool refill (again) 2023-05-11 23:03:42 +09:00
mm mm/mempolicy: correctly update prev when policy is equal on mbind 2023-05-11 23:03:41 +09:00
net af_packet: Don't send zero-byte data in packet_sendmsg_spkt(). 2023-05-17 11:53:37 +02:00
rust rust: kernel: Mark rust_fmt_argument as extern "C" 2023-04-26 14:28:38 +02:00
samples ftrace: Export ftrace_free_filter() to modules 2023-02-01 08:34:37 +01:00
scripts scripts/gdb: fix lx-timerlist for Python3 2023-05-11 23:03:40 +09:00
security selinux: ensure av_permissions.h is built when needed 2023-05-11 23:03:06 +09:00
sound ASoC: codecs: wcd938x: fix accessing regmap on unattached devices 2023-05-17 11:53:55 +02:00
tools perf stat: Separate bperf from bpf_profiler 2023-05-17 11:53:41 +02:00
usr
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virt KVM: Register /dev/kvm as the _very_ last thing during initialization 2023-03-10 09:34:11 +01:00
.clang-format
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.cocciconfig
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.get_maintainer.ignore
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.gitattributes
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.gitignore
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.mailmap
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.rustfmt.toml
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COPYING
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CREDITS
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Kbuild
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Kconfig
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MAINTAINERS audit: update the mailing list in MAINTAINERS 2023-02-25 11:25:42 +01:00
Makefile Linux 6.1.28 2023-05-11 23:04:52 +09:00
README
…

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.