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Long Li 8a45667955 xfs: fix perag leak when growfs fails 
commit 7823921887 upstream.

During growfs, if new ag in memory has been initialized, however
sb_agcount has not been updated, if an error occurs at this time it
will cause perag leaks as follows, these new AGs will not been freed
during umount , because of these new AGs are not visible(that is
included in mp->m_sb.sb_agcount).

unreferenced object 0xffff88810be40200 (size 512):
  comm "xfs_growfs", pid 857, jiffies 4294909093
  hex dump (first 32 bytes):
    00 c0 c1 05 81 88 ff ff 04 00 00 00 00 00 00 00  ................
    01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace (crc 381741e2):
    [<ffffffff8191aef6>] __kmalloc+0x386/0x4f0
    [<ffffffff82553e65>] kmem_alloc+0xb5/0x2f0
    [<ffffffff8238dac5>] xfs_initialize_perag+0xc5/0x810
    [<ffffffff824f679c>] xfs_growfs_data+0x9bc/0xbc0
    [<ffffffff8250b90e>] xfs_file_ioctl+0x5fe/0x14d0
    [<ffffffff81aa5194>] __x64_sys_ioctl+0x144/0x1c0
    [<ffffffff83c3d81f>] do_syscall_64+0x3f/0xe0
    [<ffffffff83e00087>] entry_SYSCALL_64_after_hwframe+0x62/0x6a
unreferenced object 0xffff88810be40800 (size 512):
  comm "xfs_growfs", pid 857, jiffies 4294909093
  hex dump (first 32 bytes):
    20 00 00 00 00 00 00 00 57 ef be dc 00 00 00 00   .......W.......
    10 08 e4 0b 81 88 ff ff 10 08 e4 0b 81 88 ff ff  ................
  backtrace (crc bde50e2d):
    [<ffffffff8191b43a>] __kmalloc_node+0x3da/0x540
    [<ffffffff81814489>] kvmalloc_node+0x99/0x160
    [<ffffffff8286acff>] bucket_table_alloc.isra.0+0x5f/0x400
    [<ffffffff8286bdc5>] rhashtable_init+0x405/0x760
    [<ffffffff8238dda3>] xfs_initialize_perag+0x3a3/0x810
    [<ffffffff824f679c>] xfs_growfs_data+0x9bc/0xbc0
    [<ffffffff8250b90e>] xfs_file_ioctl+0x5fe/0x14d0
    [<ffffffff81aa5194>] __x64_sys_ioctl+0x144/0x1c0
    [<ffffffff83c3d81f>] do_syscall_64+0x3f/0xe0
    [<ffffffff83e00087>] entry_SYSCALL_64_after_hwframe+0x62/0x6a

Factor out xfs_free_unused_perag_range() from xfs_initialize_perag(),
used for freeing unused perag within a specified range in error handling,
included in the error path of the growfs failure.

Fixes: 1c1c6ebcf5 ("xfs: Replace per-ag array with a radix tree")
Signed-off-by: Long Li <leo.lilong@huawei.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2024-04-03 15:28:48 +02:00
arch x86/efistub: Call mixed mode boot services on the firmware's stack 2024-04-03 15:28:45 +02:00
block Revert "block/mq-deadline: use correct way to throttling write requests" 2024-04-03 15:28:33 +02:00
certs certs: Reference revocation list for all keyrings 2023-08-17 20:12:41 +00:00
crypto crypto: jitter - fix CRYPTO_JITTERENTROPY help text 2024-03-26 18:19:52 -04:00
Documentation docs: Restore "smart quotes" for quotes 2024-04-03 15:28:22 +02:00
drivers wifi: rtw88: 8821cu: Fix connection failure 2024-04-03 15:28:46 +02:00
fs xfs: fix perag leak when growfs fails 2024-04-03 15:28:48 +02:00
include mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-04-03 15:28:44 +02:00
init init/Kconfig: lower GCC version check for -Warray-bounds 2024-04-03 15:28:41 +02:00
io_uring io_uring: clean rings on NO_MMAP alloc fail 2024-04-03 15:28:31 +02:00
ipc Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
kernel tracing: Use .flush() call to wake up readers 2024-04-03 15:28:41 +02:00
lib pci_iounmap(): Fix MMIO mapping leak 2024-04-03 15:28:17 +02:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-04-03 15:28:44 +02:00
net xfrm: Avoid clang fortify warning in copy_to_user_tmpl() 2024-04-03 15:28:40 +02:00
rust rust: upgrade to Rust 1.73.0 2024-02-16 19:10:43 +01:00
samples work around gcc bugs with 'asm goto' with outputs 2024-02-23 09:24:47 +01:00
scripts kbuild: Move -Wenum-{compare-conditional,enum-conversion} into W=1 2024-04-03 15:28:29 +02:00
security landlock: Warn once if a Landlock action is requested while disabled 2024-04-03 15:28:27 +02:00
sound ASoC: amd: yc: Revert "Fix non-functional mic on Lenovo 21J2" 2024-04-03 15:28:46 +02:00
tools selftests: mptcp: diag: return KSFT_FAIL not test_cnt 2024-04-03 15:28:40 +02:00
usr initramfs: Encode dependency on KBUILD_BUILD_TIMESTAMP 2023-06-06 17:54:49 +09:00
virt KVM: Always flush async #PF workqueue when vCPU is being destroyed 2024-04-03 15:28:18 +02:00
.clang-format iommu: Add for_each_group_device() 2023-05-23 08:15:51 +02:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: rpm-pkg: rename binkernel.spec to kernel.spec 2023-07-25 00:59:33 +09:00
.mailmap 20 hotfixes. 12 are cc:stable and the remainder address post-6.5 issues 2023-10-24 09:52:16 -10:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS USB: Remove Wireless USB and UWB documentation 2023-08-09 14:17:32 +02:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add Catherine as xfs maintainer for 6.6.y 2024-02-16 19:10:43 +01:00
Makefile Linux 6.6.23 2024-03-26 18:22:53 -04:00
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.