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Joseph Qi 58f7e1e2c9 ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty() 
bdev->bd_super has been removed and commit 8887b94d93 change the usage
from bdev->bd_super to b_assoc_map->host->i_sb.  This introduces the
following NULL pointer dereference in ocfs2_journal_dirty() since
b_assoc_map is still not initialized.  This can be easily reproduced by
running xfstests generic/186, which simulate no more credits.

[  134.351592] BUG: kernel NULL pointer dereference, address: 0000000000000000
...
[  134.355341] RIP: 0010:ocfs2_journal_dirty+0x14f/0x160 [ocfs2]
...
[  134.365071] Call Trace:
[  134.365312]  <TASK>
[  134.365524]  ? __die_body+0x1e/0x60
[  134.365868]  ? page_fault_oops+0x13d/0x4f0
[  134.366265]  ? __pfx_bit_wait_io+0x10/0x10
[  134.366659]  ? schedule+0x27/0xb0
[  134.366981]  ? exc_page_fault+0x6a/0x140
[  134.367356]  ? asm_exc_page_fault+0x26/0x30
[  134.367762]  ? ocfs2_journal_dirty+0x14f/0x160 [ocfs2]
[  134.368305]  ? ocfs2_journal_dirty+0x13d/0x160 [ocfs2]
[  134.368837]  ocfs2_create_new_meta_bhs.isra.51+0x139/0x2e0 [ocfs2]
[  134.369454]  ocfs2_grow_tree+0x688/0x8a0 [ocfs2]
[  134.369927]  ocfs2_split_and_insert.isra.67+0x35c/0x4a0 [ocfs2]
[  134.370521]  ocfs2_split_extent+0x314/0x4d0 [ocfs2]
[  134.371019]  ocfs2_change_extent_flag+0x174/0x410 [ocfs2]
[  134.371566]  ocfs2_add_refcount_flag+0x3fa/0x630 [ocfs2]
[  134.372117]  ocfs2_reflink_remap_extent+0x21b/0x4c0 [ocfs2]
[  134.372994]  ? inode_update_timestamps+0x4a/0x120
[  134.373692]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]
[  134.374545]  ? __pfx_ocfs2_journal_access_di+0x10/0x10 [ocfs2]
[  134.375393]  ocfs2_reflink_remap_blocks+0xe4/0x4e0 [ocfs2]
[  134.376197]  ocfs2_remap_file_range+0x1de/0x390 [ocfs2]
[  134.376971]  ? security_file_permission+0x29/0x50
[  134.377644]  vfs_clone_file_range+0xfe/0x320
[  134.378268]  ioctl_file_clone+0x45/0xa0
[  134.378853]  do_vfs_ioctl+0x457/0x990
[  134.379422]  __x64_sys_ioctl+0x6e/0xd0
[  134.379987]  do_syscall_64+0x5d/0x170
[  134.380550]  entry_SYSCALL_64_after_hwframe+0x76/0x7e
[  134.381231] RIP: 0033:0x7fa4926397cb
[  134.381786] Code: 73 01 c3 48 8b 0d bd 56 38 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 10 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 8d 56 38 00 f7 d8 64 89 01 48
[  134.383930] RSP: 002b:00007ffc2b39f7b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[  134.384854] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa4926397cb
[  134.385734] RDX: 00007ffc2b39f7f0 RSI: 000000004020940d RDI: 0000000000000003
[  134.386606] RBP: 0000000000000000 R08: 00111a82a4f015bb R09: 00007fa494221000
[  134.387476] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[  134.388342] R13: 0000000000f10000 R14: 0000558e844e2ac8 R15: 0000000000f10000
[  134.389207]  </TASK>

Fix it by only aborting transaction and journal in ocfs2_journal_dirty()
now, and leave ocfs2_abort() later when detecting an aborted handle,
e.g. start next transaction. Also log the handle details in this case.

Link: https://lkml.kernel.org/r/20240530110630.3933832-1-joseph.qi@linux.alibaba.com
Fixes: 8887b94d93 ("ocfs2: stop using bdev->bd_super for journal error logging")
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Reviewed-by: Heming Zhao <heming.zhao@suse.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Changwei Ge <gechangwei@live.cn>
Cc: Gang He <ghe@suse.com>
Cc: Jun Piao <piaojun@huawei.com>
Cc: <stable@vger.kernel.org>	[6.6+]
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
2024-06-15 10:43:04 -07:00
arch Miscellaneous fixes: 2024-06-08 09:36:08 -07:00
block blk-throttle: Fix incorrect display of io.max 2024-05-30 19:44:29 -06:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto This push fixes a bug in the new ecc P521 code as well as a buggy 2024-05-20 08:47:54 -07:00
Documentation for-linus-2024060801 2024-06-08 10:48:11 -07:00
drivers - Convert PCI core error codes to proper error numbers since latter get 2024-06-09 08:49:13 -07:00
fs ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty() 2024-06-15 10:43:04 -07:00
include for-linus-2024060801 2024-06-08 10:48:11 -07:00
init Driver core changes for 6.10-rc1 2024-05-22 12:13:40 -07:00
io_uring io_uring: fix possible deadlock in io_register_iowq_max_workers() 2024-06-04 07:39:17 -06:00
ipc Mainly singleton patches, documented in their respective changelogs. 2024-05-19 14:02:03 -07:00
kernel Fix race between perf_event_free_task() and perf_event_release_kernel() 2024-06-08 09:26:59 -07:00
lib Including fixes from BPF and big collection of fixes for WiFi core 2024-06-06 09:55:27 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm mm: fix xyz_noprof functions calling profiled functions 2024-06-05 19:19:26 -07:00
net nfsd-6.10 fixes: 2024-06-07 15:07:57 -07:00
rust LoongArch changes for v6.10 2024-05-22 09:43:07 -07:00
samples tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
scripts Kbuild fixes for v6.10 (second) 2024-06-08 10:12:33 -07:00
security tomoyo: update project links 2024-06-03 22:43:11 +09:00
sound ALSA: seq: ump: Fix swapped song position pointer data 2024-05-31 09:51:44 +02:00
tools perf tools fixes for v6.10: 2nd batch 2024-06-09 09:04:51 -07:00
usr kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
virt The usual shower of singleton fixes and minor series all over MM, 2024-05-19 09:21:03 -07:00
.clang-format clang-format: Update with v6.7-rc4's for_each macro list 2023-12-08 23:54:38 +01:00
.cocciconfig
.editorconfig Add .editorconfig file for basic formatting 2023-12-28 16:22:47 +09:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: create a list of all built DTB files 2024-02-19 18:20:39 +09:00
.mailmap mailmap: update entry for Kees Cook 2024-05-31 08:58:36 -07:00
.rustfmt.toml
COPYING
CREDITS MAINTAINERS: Drop Gustavo Pimentel as PCI DWC Maintainer 2024-03-27 13:41:02 -05:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig
MAINTAINERS Including fixes from BPF and big collection of fixes for WiFi core 2024-06-06 09:55:27 -07:00
Makefile Linux 6.10-rc3 2024-06-09 14:19:43 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -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 reStructuredText 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.