linux-stable

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Shyam Prasad N f30bbc3870 cifs: fix a pending undercount of srv_count The following commit reverted the changes to ref count the server struct while scheduling a reconnect work: `8233425248` Revert "cifs: reconnect work should have reference on server struct" However, a following change also introduced scheduling of reconnect work, and assumed ref counting. This change fixes that as well. Fixes umount problems like: [73496.157838] CPU: 5 PID: 1321389 Comm: umount Tainted: G W OE 6.7.0-060700rc6-generic #202312172332 [73496.157841] Hardware name: LENOVO 20MAS08500/20MAS08500, BIOS N2CET67W (1.50 ) 12/15/2022 [73496.157843] RIP: 0010:cifs_put_tcp_session+0x17d/0x190 [cifs] [73496.157906] Code: 5d 31 c0 31 d2 31 f6 31 ff c3 cc cc cc cc e8 4a 6e 14 e6 e9 f6 fe ff ff be 03 00 00 00 48 89 d7 e8 78 26 b3 e5 e9 e4 fe ff ff <0f> 0b e9 b1 fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 [73496.157908] RSP: 0018:ffffc90003bcbcb8 EFLAGS: 00010286 [73496.157911] RAX: 00000000ffffffff RBX: ffff8885830fa800 RCX: 0000000000000000 [73496.157913] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [73496.157915] RBP: ffffc90003bcbcc8 R08: 0000000000000000 R09: 0000000000000000 [73496.157917] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [73496.157918] R13: ffff8887d56ba800 R14: 00000000ffffffff R15: ffff8885830fa800 [73496.157920] FS: 00007f1ff0e33800(0000) GS:ffff88887ba80000(0000) knlGS:0000000000000000 [73496.157922] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [73496.157924] CR2: 0000115f002e2010 CR3: 00000003d1e24005 CR4: 00000000003706f0 [73496.157926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [73496.157928] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [73496.157929] Call Trace: [73496.157931] <TASK> [73496.157933] ? show_regs+0x6d/0x80 [73496.157936] ? __warn+0x89/0x160 [73496.157939] ? cifs_put_tcp_session+0x17d/0x190 [cifs] [73496.157976] ? report_bug+0x17e/0x1b0 [73496.157980] ? handle_bug+0x51/0xa0 [73496.157983] ? exc_invalid_op+0x18/0x80 [73496.157985] ? asm_exc_invalid_op+0x1b/0x20 [73496.157989] ? cifs_put_tcp_session+0x17d/0x190 [cifs] [73496.158023] ? cifs_put_tcp_session+0x1e/0x190 [cifs] [73496.158057] __cifs_put_smb_ses+0x2b5/0x540 [cifs] [73496.158090] ? tconInfoFree+0xc2/0x120 [cifs] [73496.158130] cifs_put_tcon.part.0+0x108/0x2b0 [cifs] [73496.158173] cifs_put_tlink+0x49/0x90 [cifs] [73496.158220] cifs_umount+0x56/0xb0 [cifs] [73496.158258] cifs_kill_sb+0x52/0x60 [cifs] [73496.158306] deactivate_locked_super+0x32/0xc0 [73496.158309] deactivate_super+0x46/0x60 [73496.158311] cleanup_mnt+0xc3/0x170 [73496.158314] __cleanup_mnt+0x12/0x20 [73496.158330] task_work_run+0x5e/0xa0 [73496.158333] exit_to_user_mode_loop+0x105/0x130 [73496.158336] exit_to_user_mode_prepare+0xa5/0xb0 [73496.158338] syscall_exit_to_user_mode+0x29/0x60 [73496.158341] do_syscall_64+0x6c/0xf0 [73496.158344] ? syscall_exit_to_user_mode+0x37/0x60 [73496.158346] ? do_syscall_64+0x6c/0xf0 [73496.158349] ? exit_to_user_mode_prepare+0x30/0xb0 [73496.158353] ? syscall_exit_to_user_mode+0x37/0x60 [73496.158355] ? do_syscall_64+0x6c/0xf0 Reported-by: Robert Morris <rtm@csail.mit.edu> Fixes: `705fc522fe` ("cifs: handle when server starts supporting multichannel") Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>		2023-12-19 10:59:11 -06:00
arch	powerpc fixes for 6.7 #5	2023-12-17 08:50:00 -08:00
block	block-6.7-2023-12-01	2023-12-02 06:39:30 +09:00
certs	This update includes the following changes:	2023-11-02 16:15:30 -10:00
crypto	This push fixes a regression in ahash and hides the Kconfig sub-options for the jitter RNG.	2023-11-09 17:04:58 -08:00
Documentation	drm fixes for 6.7-rc6	2023-12-15 11:07:13 -08:00
drivers	soundwire fixes for 6.7	2023-12-17 09:24:06 -08:00
fs	cifs: fix a pending undercount of srv_count	2023-12-19 10:59:11 -06:00
include	pci-v6.7-fixes-1	2023-12-15 19:48:47 -08:00
init	As usual, lots of singleton and doubleton patches all over the tree and	2023-11-02 20:53:31 -10:00
io_uring	io_uring/cmd: fix breakage in SOCKET_URING_OP_SIOC* implementation	2023-12-14 16:52:13 -07:00
ipc	Many singleton patches against the MM code. The patch series which are	2023-11-02 19:38:47 -10:00
kernel	- Avoid iterating over newly created group leader event's siblings	2023-12-17 14:03:11 -08:00
lib	cred: get rid of CONFIG_DEBUG_CREDENTIALS	2023-12-15 14:19:48 -08:00
LICENSES	LICENSES: Add the copyleft-next-0.3.1 license	2022-11-08 15:44:01 +01:00
mm	mm/mglru: reclaim offlined memcgs harder	2023-12-12 17:20:20 -08:00
net	cred: get rid of CONFIG_DEBUG_CREDENTIALS	2023-12-15 14:19:48 -08:00
rust	Kbuild updates for v6.7	2023-11-04 08:07:19 -10:00
samples	Landlock updates for v6.7-rc1	2023-11-03 09:28:53 -10:00
scripts	sign-file: Fix incorrect return values check	2023-12-13 12:55:11 -08:00
security	cred: get rid of CONFIG_DEBUG_CREDENTIALS	2023-12-15 14:19:48 -08:00
sound	ALSA: hda/tas2781: reset the amp before component_add	2023-12-14 12:04:38 +01:00
tools	cxl fixes for 6.7-rc6	2023-12-17 09:07:34 -08:00
usr	arch: Remove Itanium (IA-64) architecture	2023-09-11 08:13:17 +00:00
virt	Revert "KVM: Prevent module exit until all VMs are freed"	2023-12-01 08:12:30 -08:00
.clang-format	iommu: Add for_each_group_device()	2023-05-23 08:15:51 +02:00
.cocciconfig
.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	hid-for-linus-2023121201	2023-12-12 17:02:56 -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	MAINTAINERS: drop Antti Palosaari	2023-12-06 16:12:49 -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	powerpc fixes for 6.7 #5	2023-12-17 08:50:00 -08:00
Makefile	Linux 6.7-rc6	2023-12-17 15:19:28 -08:00
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.