From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Jeff Layton <jlayton@redhat.com>,
Rabin Vincent <rabinv@axis.com>,
Steve French <smfrench@gmail.com>
Subject: [PATCH 4.4 15/29] cifs: initialize file_info_lock
Date: Tue, 7 Feb 2017 13:45:44 +0100 [thread overview]
Message-ID: <20170207124459.377264233@linuxfoundation.org> (raw)
In-Reply-To: <20170207124458.685292007@linuxfoundation.org>
4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Rabin Vincent <rabinv@axis.com>
commit 81ddd8c0c5e1cb41184d66567140cb48c53eb3d1 upstream.
Reviewed-by: Jeff Layton <jlayton@redhat.com>
file_info_lock is not initalized in initiate_cifs_search(), leading to the
following splat after a simple "mount.cifs ... dir && ls dir/":
BUG: spinlock bad magic on CPU#0, ls/486
lock: 0xffff880009301110, .magic: 00000000, .owner: <none>/-1, .owner_cpu: 0
CPU: 0 PID: 486 Comm: ls Not tainted 4.9.0 #27
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996)
ffffc900042f3db0 ffffffff81327533 0000000000000000 ffff880009301110
ffffc900042f3dd0 ffffffff810baf75 ffff880009301110 ffffffff817ae077
ffffc900042f3df0 ffffffff810baff6 ffff880009301110 ffff880008d69900
Call Trace:
[<ffffffff81327533>] dump_stack+0x65/0x92
[<ffffffff810baf75>] spin_dump+0x85/0xe0
[<ffffffff810baff6>] spin_bug+0x26/0x30
[<ffffffff810bb159>] do_raw_spin_lock+0xe9/0x130
[<ffffffff8159ad2f>] _raw_spin_lock+0x1f/0x30
[<ffffffff8127e50d>] cifs_closedir+0x4d/0x100
[<ffffffff81181cfd>] __fput+0x5d/0x160
[<ffffffff81181e3e>] ____fput+0xe/0x10
[<ffffffff8109410e>] task_work_run+0x7e/0xa0
[<ffffffff81002512>] exit_to_usermode_loop+0x92/0xa0
[<ffffffff810026f9>] syscall_return_slowpath+0x49/0x50
[<ffffffff8159b484>] entry_SYSCALL_64_fastpath+0xa7/0xa9
Fixes: 3afca265b5f53a0 ("Clarify locking of cifs file and tcon structures and make more granular")
Signed-off-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
fs/cifs/readdir.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -282,6 +282,7 @@ initiate_cifs_search(const unsigned int
rc = -ENOMEM;
goto error_exit;
}
+ spin_lock_init(&cifsFile->file_info_lock);
file->private_data = cifsFile;
cifsFile->tlink = cifs_get_tlink(tlink);
tcon = tlink_tcon(tlink);
next prev parent reply other threads:[~2017-02-07 12:45 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-07 12:45 [PATCH 4.4 00/29] 4.4.48-stable review Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 01/29] PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 02/29] ext4: validate s_first_meta_bg at mount time Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 03/29] drm/nouveau/disp/gt215: Fix HDA ELD handling (thus, HDMI audio) on gt215 Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 04/29] drm/nouveau/nv1a,nv1f/disp: fix memory clock rate retrieval Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 05/29] crypto: api - Clear CRYPTO_ALG_DEAD bit before registering an alg Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 06/29] crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 07/29] perf/core: Fix PERF_RECORD_MMAP2 prot/flags for anonymous memory Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 08/29] ata: sata_mv:- Handle return value of devm_ioremap Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 10/29] powerpc/eeh: Fix wrong flag passed to eeh_unfreeze_pe() Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 11/29] powerpc: Add missing error check to prom_find_boot_cpu() Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 12/29] NFSD: Fix a null reference case in find_or_create_lock_stateid() Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 13/29] svcrpc: fix oops in absence of krb5 module Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 14/29] zswap: disable changing params if init fails Greg Kroah-Hartman
2017-02-07 12:45 ` Greg Kroah-Hartman [this message]
2017-02-07 12:45 ` [PATCH 4.4 16/29] mm/memory_hotplug.c: check start_pfn in test_pages_in_a_zone() Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 17/29] mm, fs: check for fatal signals in do_generic_file_read() Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 18/29] can: bcm: fix hrtimer/tasklet termination in bcm op removal Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 19/29] mmc: sdhci: Ignore unexpected CARD_INT interrupts Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 20/29] percpu-refcount: fix reference leak during percpu-atomic transition Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 21/29] HID: wacom: Fix poor prox handling in wacom_pl_irq Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 23/29] USB: serial: qcserial: add Dell DW5570 QDL Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 24/29] USB: serial: pl2303: add ATEN device ID Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 26/29] usb: gadget: f_fs: Assorted buffer overflow checks Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 28/29] x86/irq: Make irq activate operations symmetric Greg Kroah-Hartman
2017-02-07 12:45 ` [PATCH 4.4 29/29] base/memory, hotplug: fix a kernel oops in show_valid_zones() Greg Kroah-Hartman
2017-02-07 15:59 ` [PATCH 4.4 00/29] 4.4.48-stable review Shuah Khan
2017-02-07 21:43 ` Guenter Roeck
[not found] ` <589a7404.48301c0a.b5123.22e3@mx.google.com>
2017-02-08 6:36 ` Greg Kroah-Hartman
2017-02-08 19:40 ` Kevin Hilman
2017-02-08 20:07 ` Greg Kroah-Hartman
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