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Openwrt/target/linux/generic/pending-4.19/102-MIPS-only-process-negative-stack-offsets-on-stack-tr.patch

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kernel: Copy patches from kernel 4.14 to 4.19 This just copies the files from the kernel 4.14 specific folders into the kernel 4.19 specific folder, no changes are done to the files in this commit. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2018-11-01 16:57:55 +00:00
From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 18 Apr 2018 10:50:05 +0200
Subject: [PATCH] MIPS: only process negative stack offsets on stack traces
Fixes endless back traces in cases where the compiler emits a stack
pointer increase in a branch delay slot (probably for some form of
function return).
[ 3.475442] BUG: MAX_STACK_TRACE_ENTRIES too low!
[ 3.480070] turning off the locking correctness validator.
[ 3.485521] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.14.34 #0
[ 3.491475] Stack : 00000000 00000000 00000000 00000000 80e0fce2 00000034 00000000 00000000
[ 3.499764] 87c3838c 80696377 8061047c 00000000 00000001 00000001 87c2d850 6534689f
[ 3.508059] 00000000 00000000 80e10000 00000000 00000000 000000cf 0000000f 00000000
[ 3.516353] 00000000 806a0000 00076891 00000000 00000000 00000000 ffffffff 00000000
[ 3.524648] 806c0000 00000004 80e10000 806a0000 00000003 80690000 00000000 80700000
[ 3.532942] ...
[ 3.535362] Call Trace:
[ 3.537818] [<80010a48>] show_stack+0x58/0x100
[ 3.542207] [<804c2f78>] dump_stack+0xe8/0x170
[ 3.546613] [<80079f90>] save_trace+0xf0/0x110
[ 3.551010] [<8007b1ec>] mark_lock+0x33c/0x78c
[ 3.555413] [<8007bf48>] __lock_acquire+0x2ac/0x1a08
[ 3.560337] [<8007de60>] lock_acquire+0x64/0x8c
[ 3.564846] [<804e1570>] _raw_spin_lock_irqsave+0x54/0x78
[ 3.570186] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.574770] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.579257] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.583839] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.588329] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.592911] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.597401] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.601983] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.606473] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.611055] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.615545] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.620125] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.624619] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.629197] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.633691] [<801b618c>] kernfs_notify+0x94/0xac
[ 3.638269] [<801b7b10>] sysfs_notify+0x74/0xa0
[ 3.642763] [<801b618c>] kernfs_notify+0x94/0xac
Signed-off-by: Felix Fietkau <nbd@nbd.name>
---
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
kernel: Make the patches apply on top of 4.19 This makes the patches which were just copied in the previous commit apply on top of kernel 4.19. The patches in the backports-4.19 folder were checked if they are really in kernel 4.19 based on the title and only removed if they were found in the upstream kernel. The following additional patches form the pending folder went into upstream Linux 4.19: pending-4.19/171-usb-dwc2-Fix-inefficient-copy-of-unaligned-buffers.patch pending-4.19/190-2-5-e1000e-Fix-wrong-comment-related-to-link-detection.patch pending-4.19/478-mtd-spi-nor-Add-support-for-XM25QH64A-and-XM25QH128A.patch pending-4.19/479-mtd-spi-nor-add-eon-en25qh32.patch pending-4.19/950-tty-serial-exar-generalize-rs485-setup.patch pending-4.19/340-MIPS-mm-remove-mips_dma_mapping_error.patch Bigger changes were introduced to the m25p80 spi nor driver, as far as I saw it in the new code, it now has the functionality provided in this patch: pending-4.19/450-mtd-m25p80-allow-fallback-from-spi_flash_read-to-reg.patch Part of this patch went upstream independent of OpenWrt: hack-4.19/220-gc_sections.patch This patch was reworked to match the changes done upstream. The MIPS DMA API changed a lot, this patch was rewritten to match the new DMA handling: pending-4.19/341-MIPS-mm-remove-no-op-dma_map_ops-where-possible.patch I did bigger manual changes to the following patches and I am not 100% sure if they are all correct: pending-4.19/0931-w1-gpio-fix-problem-with-platfom-data-in-w1-gpio.patch pending-4.19/411-mtd-partial_eraseblock_write.patch pending-4.19/600-netfilter_conntrack_flush.patch pending-4.19/611-netfilter_match_bypass_default_table.patch pending-4.19/670-ipv6-allow-rejecting-with-source-address-failed-policy.patch hack-4.19/211-host_tools_portability.patch hack-4.19/221-module_exports.patch hack-4.19/321-powerpc_crtsavres_prereq.patch hack-4.19/902-debloat_proc.patch This is based on patchset from Marko Ratkaj <marko.ratkaj@sartura.hr> Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2018-11-01 17:01:44 +00:00
@@ -361,6 +361,8 @@ static inline int is_sp_move_ins(union m
kernel: Copy patches from kernel 4.14 to 4.19 This just copies the files from the kernel 4.14 specific folders into the kernel 4.19 specific folder, no changes are done to the files in this commit. Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
2018-11-01 16:57:55 +00:00
if (ip->i_format.opcode == addiu_op ||
ip->i_format.opcode == daddiu_op) {
+ if (ip->i_format.simmediate > 0)
+ return 0;
*frame_size = -ip->i_format.simmediate;
return 1;
}
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