Revision baf76f0c58aec435a3a864075b8f6d8ee5d1f17e authored by Linus Torvalds on 25 April 2019, 23:13:58 UTC, committed by Linus Torvalds on 27 April 2019, 01:19:09 UTC
This way, slhc_free() accepts what slhc_init() returns, whether that is an error or not. In particular, the pattern in sl_alloc_bufs() is slcomp = slhc_init(16, 16); ... slhc_free(slcomp); for the error handling path, and rather than complicate that code, just make it ok to always free what was returned by the init function. That's what the code used to do before commit 4ab42d78e37a ("ppp, slip: Validate VJ compression slot parameters completely") when slhc_init() just returned NULL for the error case, with no actual indication of the details of the error. Reported-by: syzbot+45474c076a4927533d2e@syzkaller.appspotmail.com Fixes: 4ab42d78e37a ("ppp, slip: Validate VJ compression slot parameters completely") Acked-by: Ben Hutchings <ben@decadent.org.uk> Cc: David Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Kconfig.iosched
# SPDX-License-Identifier: GPL-2.0
if BLOCK
menu "IO Schedulers"
config MQ_IOSCHED_DEADLINE
tristate "MQ deadline I/O scheduler"
default y
---help---
MQ version of the deadline IO scheduler.
config MQ_IOSCHED_KYBER
tristate "Kyber I/O scheduler"
default y
---help---
The Kyber I/O scheduler is a low-overhead scheduler suitable for
multiqueue and other fast devices. Given target latencies for reads and
synchronous writes, it will self-tune queue depths to achieve that
goal.
config IOSCHED_BFQ
tristate "BFQ I/O scheduler"
---help---
BFQ I/O scheduler for BLK-MQ. BFQ distributes the bandwidth of
of the device among all processes according to their weights,
regardless of the device parameters and with any workload. It
also guarantees a low latency to interactive and soft
real-time applications. Details in
Documentation/block/bfq-iosched.txt
config BFQ_GROUP_IOSCHED
bool "BFQ hierarchical scheduling support"
depends on IOSCHED_BFQ && BLK_CGROUP
---help---
Enable hierarchical scheduling in BFQ, using the blkio
(cgroups-v1) or io (cgroups-v2) controller.
endmenu
endif
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