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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Wei Fang <fangwei1@huawei.com>,
	Shaohua Li <shli@fb.com>, Julia Lawall <julia.lawall@lip6.fr>
Subject: [PATCH 4.4 08/43] md:raid1: fix a dead loop when read from a WriteMostly disk
Date: Mon,  1 May 2017 14:27:08 -0700	[thread overview]
Message-ID: <20170501212559.879420081@linuxfoundation.org> (raw)
In-Reply-To: <20170501212559.546911128@linuxfoundation.org>

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Wei Fang <fangwei1@huawei.com>

commit 816b0acf3deb6d6be5d0519b286fdd4bafade905 upstream.

If first_bad == this_sector when we get the WriteMostly disk
in read_balance(), valid disk will be returned with zero
max_sectors. It'll lead to a dead loop in make_request(), and
OOM will happen because of endless allocation of struct bio.

Since we can't get data from this disk in this case, so
continue for another disk.

Signed-off-by: Wei Fang <fangwei1@huawei.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/md/raid1.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -570,7 +570,7 @@ static int read_balance(struct r1conf *c
 			if (best_dist_disk < 0) {
 				if (is_badblock(rdev, this_sector, sectors,
 						&first_bad, &bad_sectors)) {
-					if (first_bad < this_sector)
+					if (first_bad <= this_sector)
 						/* Cannot use this */
 						continue;
 					best_good_sectors = first_bad - this_sector;

  parent reply	other threads:[~2017-05-01 22:02 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-05-01 21:27 [PATCH 4.4 00/43] 4.4.66-stable review Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 01/43] f2fs: do more integrity verification for superblock Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 02/43] [media] xc2028: unlock on error in xc2028_set_config() Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 03/43] ARM: OMAP2+: timer: add probe for clocksources Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 04/43] clk: sunxi: Add apb0 gates for H3 Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 05/43] crypto: testmgr - fix out of bound read in __test_aead() Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 06/43] drm/amdgpu: fix array out of bounds Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 07/43] ext4: check if in-inode xattr is corrupted in ext4_expand_extra_isize_ea() Greg Kroah-Hartman
2017-05-01 21:27 ` Greg Kroah-Hartman [this message]
2017-05-01 21:27 ` [PATCH 4.4 09/43] MIPS: Fix crash registers on non-crashing CPUs Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 10/43] net: cavium: liquidio: Avoid dma_unmap_single on uninitialized ndata Greg Kroah-Hartman
2017-05-10 15:30   ` Ben Hutchings
2018-04-06  8:26     ` Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 11/43] net_sched: close another race condition in tcf_mirred_release() Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 12/43] RDS: Fix the atomicity for congestion map update Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 13/43] regulator: core: Clear the supply pointer if enabling fails Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 14/43] usb: gadget: f_midi: Fixed a bug when buflen was smaller than wMaxPacketSize Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 15/43] xen/x86: dont lose event interrupts Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 16/43] sparc64: kern_addr_valid regression Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 17/43] sparc64: Fix kernel panic due to erroneous #ifdef surrounding pmd_write() Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 18/43] net: neigh: guard against NULL solicit() method Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 19/43] net: phy: handle state correctly in phy_stop_machine Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 20/43] l2tp: purge socket queues in the .destruct() callback Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 21/43] net/packet: fix overflow in check for tp_frame_nr Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 22/43] net/packet: fix overflow in check for tp_reserve Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 23/43] l2tp: take reference on sessions being dumped Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 24/43] l2tp: fix PPP pseudo-wire auto-loading Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 25/43] net: ipv4: fix multipath RTM_GETROUTE behavior when iif is given Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 26/43] sctp: listen on the sock only when its state is listening or closed Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 27/43] tcp: clear saved_syn in tcp_disconnect() Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 29/43] net: ipv6: RTF_PCPU should not be settable from userspace Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 30/43] netpoll: Check for skb->queue_mapping Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 31/43] ip6mr: fix notification device destruction Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 32/43] macvlan: Fix device ref leak when purging bc_queue Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 33/43] ipv6: check skb->protocol before lookup for nexthop Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 34/43] ipv6: check raw payload size correctly in ioctl Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 35/43] ALSA: firewire-lib: fix inappropriate assignment between signed/unsigned type Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 36/43] ALSA: seq: Dont break snd_use_lock_sync() loop by timeout Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 37/43] MIPS: KGDB: Use kernel context for sleeping threads Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 38/43] MIPS: Avoid BUG warning in arch_check_elf Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 39/43] p9_client_readdir() fix Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 42/43] ARCv2: save r30 on kernel entry as gcc uses it for code-gen Greg Kroah-Hartman
2017-05-01 21:27 ` [PATCH 4.4 43/43] ftrace/x86: Fix triple fault with graph tracing and suspend-to-ram Greg Kroah-Hartman
     [not found] ` <59080414.87dfe90a.9590.db81@mx.google.com>
2017-05-02 13:53   ` [PATCH 4.4 00/43] 4.4.66-stable review Shuah Khan
2017-05-02 17:35 ` Guenter Roeck

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