Kees Cook ce469db094 pstore/ram: Correctly calculate usable PRZ bytes ... [ Upstream commit 89d328f637 ] The actual number of bytes stored in a PRZ is smaller than the bytes requested by platform data, since there is a header on each PRZ. Additionally, if ECC is enabled, there are trailing bytes used as well. Normally this mismatch doesn't matter since PRZs are circular buffers and the leading "overflow" bytes are just thrown away. However, in the case of a compressed record, this rather badly corrupts the results. This corruption was visible with "ramoops.mem_size=204800 ramoops.ecc=1". Any stored crashes would not be uncompressable (producing a pstorefs "dmesg-*.enc.z" file), and triggering errors at boot: [ 2.790759] pstore: crypto_comp_decompress failed, ret = -22! Backporting this depends on commit 70ad35db33 ("pstore: Convert console write to use ->write_buf") Reported-by: Joel Fernandes <joel@joelfernandes.org> Fixes: b0aad7a99c ("pstore: Add compression support to pstore") Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2018-12-17 09:24:39 +01:00
..
acpi
asm-generic	vmlinux.lds.h: Fix linker warnings about orphan .LPBX sections	2018-10-12 08:55:29 +11:00
clocksource
crypto	crypto: speck - remove Speck	2018-11-13 11:08:46 -08:00
drm	drm: Get ref on CRTC commit object when waiting for flip_done	2018-10-18 14:23:13 -04:00
dt-bindings	ARM: SoC: late updates	2018-08-25 14:12:36 -07:00
keys
kvm
linux	pstore/ram: Correctly calculate usable PRZ bytes	2018-12-17 09:24:39 +01:00
math-emu
media	media: cec: fix the Signal Free Time calculation	2018-11-13 11:08:53 -08:00
memory
misc
net	netfilter: add missing error handling code for register functions	2018-12-17 09:24:36 +01:00
pcmcia	pcmcia: remove long deprecated pcmcia_request_exclusive_irq() function	2018-08-18 12:30:42 -07:00
ras
rdma	IB/rxe: Revise the ib_wr_opcode enum	2018-11-13 11:08:43 -08:00
scsi	SCSI misc on 20180815	2018-08-15 22:06:26 -07:00
soc	soc: fsl: qbman: add APIs to retrieve the probing status	2018-09-27 15:43:35 -05:00
sound	ALSA: pcm: Fix interval evaluation with openmin/max	2018-12-13 09:16:16 +01:00
target
trace	sched, trace: Fix prev_state output in sched_switch tracepoint	2018-12-08 12:59:06 +01:00
uapi	x86/speculation: Add prctl() control for indirect branch speculation	2018-12-05 19:32:04 +01:00
video	fbdev changes for v4.19:	2018-08-23 15:44:58 -07:00
xen	Revert "xen/balloon: Mark unallocated host memory as UNUSABLE"	2018-12-17 09:24:39 +01:00