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Su Yue 5659067879 bcachefs: kvfree bch_fs::snapshots in bch2_fs_snapshots_exit commit `369acf97d6` upstream. bch_fs::snapshots is allocated by kvzalloc in __snapshot_t_mut. It should be freed by kvfree not kfree. Or umount will triger: [ 406.829178 ] BUG: unable to handle page fault for address: ffffe7b487148008 [ 406.830676 ] #PF: supervisor read access in kernel mode [ 406.831643 ] #PF: error_code(0x0000) - not-present page [ 406.832487 ] PGD 0 P4D 0 [ 406.832898 ] Oops: 0000 [#1] PREEMPT SMP PTI [ 406.833512 ] CPU: 2 PID: 1754 Comm: umount Kdump: loaded Tainted: G OE 6.7.0-rc7-custom+ #90 [ 406.834746 ] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Arch Linux 1.16.3-1-1 04/01/2014 [ 406.835796 ] RIP: 0010:kfree+0x62/0x140 [ 406.836197 ] Code: 80 48 01 d8 0f 82 e9 00 00 00 48 c7 c2 00 00 00 80 48 2b 15 78 9f 1f 01 48 01 d0 48 c1 e8 0c 48 c1 e0 06 48 03 05 56 9f 1f 01 <48> 8b 50 08 48 89 c7 f6 c2 01 0f 85 b0 00 00 00 66 90 48 8b 07 f6 [ 406.837810 ] RSP: 0018:ffffb9d641607e48 EFLAGS: 00010286 [ 406.838213 ] RAX: ffffe7b487148000 RBX: ffffb9d645200000 RCX: ffffb9d641607dc4 [ 406.838738 ] RDX: 000065bb00000000 RSI: ffffffffc0d88b84 RDI: ffffb9d645200000 [ 406.839217 ] RBP: ffff9a4625d00068 R08: 0000000000000001 R09: 0000000000000001 [ 406.839650 ] R10: 0000000000000001 R11: 000000000000001f R12: ffff9a4625d4da80 [ 406.840055 ] R13: ffff9a4625d00000 R14: ffffffffc0e2eb20 R15: 0000000000000000 [ 406.840451 ] FS: 00007f0a264ffb80(0000) GS:ffff9a4e2d500000(0000) knlGS:0000000000000000 [ 406.840851 ] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 406.841125 ] CR2: ffffe7b487148008 CR3: 000000018c4d2000 CR4: 00000000000006f0 [ 406.841464 ] Call Trace: [ 406.841583 ] <TASK> [ 406.841682 ] ? __die+0x1f/0x70 [ 406.841828 ] ? page_fault_oops+0x159/0x470 [ 406.842014 ] ? fixup_exception+0x22/0x310 [ 406.842198 ] ? exc_page_fault+0x1ed/0x200 [ 406.842382 ] ? asm_exc_page_fault+0x22/0x30 [ 406.842574 ] ? bch2_fs_release+0x54/0x280 [bcachefs] [ 406.842842 ] ? kfree+0x62/0x140 [ 406.842988 ] ? kfree+0x104/0x140 [ 406.843138 ] bch2_fs_release+0x54/0x280 [bcachefs] [ 406.843390 ] kobject_put+0xb7/0x170 [ 406.843552 ] deactivate_locked_super+0x2f/0xa0 [ 406.843756 ] cleanup_mnt+0xba/0x150 [ 406.843917 ] task_work_run+0x59/0xa0 [ 406.844083 ] exit_to_user_mode_prepare+0x197/0x1a0 [ 406.844302 ] syscall_exit_to_user_mode+0x16/0x40 [ 406.844510 ] do_syscall_64+0x4e/0xf0 [ 406.844675 ] entry_SYSCALL_64_after_hwframe+0x6e/0x76 [ 406.844907 ] RIP: 0033:0x7f0a2664e4fb Signed-off-by: Su Yue <glass.su@suse.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2024-02-16 19:14:31 +01:00
arch	x86/lib: Revert to _ASM_EXTABLE_UA() for {get,put}_user() fixups	2024-02-16 19:14:28 +01:00
block	blk-iocost: Fix an UBSAN shift-out-of-bounds warning	2024-02-16 19:14:27 +01:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	crypto: api - Disallow identical driver names	2024-01-31 16:20:54 -08:00
Documentation	net: sysfs: Fix /sys/class/net/<iface> path	2024-02-05 20:17:10 +00:00
drivers	PCI/ASPM: Fix deadlock when enabling ASPM	2024-02-16 19:14:30 +01:00
fs	bcachefs: kvfree bch_fs::snapshots in bch2_fs_snapshots_exit	2024-02-16 19:14:31 +01:00
include	new helper: user_path_locked_at()	2024-02-16 19:14:30 +01:00
init	rootfs: Fix support for rootfstype= when root= is given	2024-01-25 15:45:15 -08:00
io_uring	io_uring/rw: ensure poll based multishot read retries appropriately	2024-02-16 19:14:30 +01:00
ipc	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
kernel	hrtimer: Report offline hrtimer enqueue	2024-02-16 19:14:29 +01:00
lib	kunit: run test suites only after module initialization completes	2024-02-05 20:17:07 +00:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	mm: Introduce flush_cache_vmap_early()	2024-02-16 19:14:25 +01:00
net	libceph: just wait for more data to be available on the socket	2024-02-16 19:14:26 +01:00
rust	rust: Ignore preserve-most functions	2024-01-25 15:45:09 -08:00
samples	Landlock updates for v6.7-rc1	2023-11-03 09:28:53 -10:00
scripts	scripts/get_abi: fix source path leak	2024-01-31 16:21:00 -08:00
security	lsm: new security_file_ioctl_compat() hook	2024-01-31 16:21:00 -08:00
sound	ALSA: usb-audio: add quirk for RODE NT-USB+	2024-02-16 19:14:27 +01:00
tools	selftests: core: include linux/close_range.h for CLOSE_RANGE_* macros	2024-02-16 19:14:27 +01:00
usr	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
virt	KVM/arm64 fixes for 6.7, part #2	2023-12-22 18:03:54 -05:00
.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: generate kernel.spec in rpmbuild/SPECS/	2023-10-03 20:49:09 +09:00
.mailmap	12 hotfixes. 2 are cc:stable and the remainder either address post-6.7	2024-01-05 13:46:18 -08:00
.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	12 hotfixes. 2 are cc:stable and the remainder either address post-6.7	2024-01-05 13:46:18 -08:00
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	12 hotfixes. 2 are cc:stable and the remainder either address post-6.7	2024-01-05 13:46:18 -08:00
Makefile	Linux 6.7.4	2024-02-05 20:17:12 +00:00
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.