diff options
author | Bruce Ashfield <bruce.ashfield@gmail.com> | 2024-01-01 23:31:05 -0500 |
---|---|---|
committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2024-01-04 23:47:04 +0000 |
commit | 6e1d5d1301ae5dbc7fa1a09da831e8e9bf03671c (patch) | |
tree | 30a641f1896c9fa461dc7191f5096ebcf90c1119 /meta | |
parent | d341b4b176f72d4214714ffc7a7a5fc337eb321c (diff) | |
download | openembedded-core-contrib-6e1d5d1301ae5dbc7fa1a09da831e8e9bf03671c.tar.gz |
linux-yocto/6.6: fix AB-INT: QEMU kernel panic: No irq handler for vector
Integrating the following commit(s) to linux-yocto/6.6:
1/2 [
Author: Thomas Gleixner
Email: tglx@linutronix.de
Subject: x86/alternatives: Sync core before enabling interrupts
Date: Thu, 7 Dec 2023 20:49:24 +0100
text_poke_early() does:
local_irq_save(flags);
memcpy(addr, opcode, len);
local_irq_restore(flags);
sync_core();
That's not really correct because the synchronization should happen before
interrupts are reenabled to ensure that a pending interrupt observes the
complete update of the opcodes.
It's not entirely clear whether the interrupt entry provides enough
serialization already, but moving the sync_core() invocation into interrupt
disabled region does no harm and is obviously correct.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
]
2/2 [
Author: Thomas Gleixner
Email: tglx@linutronix.de
Subject: x86/alternatives: Disable interrupts and sync when optimizing NOPs in place
Date: Thu, 7 Dec 2023 20:49:26 +0100
apply_alternatives() treats alternatives with the ALT_FLAG_NOT flag set
special as it optimizes the existing NOPs in place.
Unfortunately this happens with interrupts enabled and does not provide any
form of core synchronization.
So an interrupt hitting in the middle of the update and using the affected
code path will observe a half updated NOP and crash and burn. The following
3 NOP sequence was observed to expose this crash halfways reliably under
QEMU 32bit:
0x90 0x90 0x90
which is replaced by the optimized 3 byte NOP:
0x8d 0x76 0x00
So an interrupt can observe:
1) 0x90 0x90 0x90 nop nop nop
2) 0x8d 0x90 0x90 undefined
3) 0x8d 0x76 0x90 lea -0x70(%esi),%esi
4) 0x8d 0x76 0x00 lea 0x0(%esi),%esi
Where only #1 and #4 are true NOPs. The same problem exists for 64bit obviously.
Disable interrupts around this NOP optimization and invoke sync_core()
before reenabling them.
Fixes: 270a69c4485d ("x86/alternative: Support relocations in alternatives")
Reported-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
]
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Diffstat (limited to 'meta')
-rw-r--r-- | meta/recipes-kernel/linux/linux-yocto-rt_6.6.bb | 2 | ||||
-rw-r--r-- | meta/recipes-kernel/linux/linux-yocto-tiny_6.6.bb | 2 | ||||
-rw-r--r-- | meta/recipes-kernel/linux/linux-yocto_6.6.bb | 22 |
3 files changed, 13 insertions, 13 deletions
diff --git a/meta/recipes-kernel/linux/linux-yocto-rt_6.6.bb b/meta/recipes-kernel/linux/linux-yocto-rt_6.6.bb index 0c0ce6afea..9a9d1ab33a 100644 --- a/meta/recipes-kernel/linux/linux-yocto-rt_6.6.bb +++ b/meta/recipes-kernel/linux/linux-yocto-rt_6.6.bb @@ -14,7 +14,7 @@ python () { raise bb.parse.SkipRecipe("Set PREFERRED_PROVIDER_virtual/kernel to linux-yocto-rt to enable it") } -SRCREV_machine ?= "bce0cb6bbe24682d839c3e212270e3744e32aabe" +SRCREV_machine ?= "3364e561d527a5dcca1803dcf5a7e2a7aa3a398e" SRCREV_meta ?= "8ab17895c185426442d80a60829619270f9ac51d" SRC_URI = "git://git.yoctoproject.org/linux-yocto.git;branch=${KBRANCH};name=machine;protocol=https \ diff --git a/meta/recipes-kernel/linux/linux-yocto-tiny_6.6.bb b/meta/recipes-kernel/linux/linux-yocto-tiny_6.6.bb index edb8001069..547b5ee922 100644 --- a/meta/recipes-kernel/linux/linux-yocto-tiny_6.6.bb +++ b/meta/recipes-kernel/linux/linux-yocto-tiny_6.6.bb @@ -17,7 +17,7 @@ DEPENDS += "openssl-native util-linux-native" KMETA = "kernel-meta" KCONF_BSP_AUDIT_LEVEL = "2" -SRCREV_machine ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" +SRCREV_machine ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" SRCREV_meta ?= "8ab17895c185426442d80a60829619270f9ac51d" PV = "${LINUX_VERSION}+git" diff --git a/meta/recipes-kernel/linux/linux-yocto_6.6.bb b/meta/recipes-kernel/linux/linux-yocto_6.6.bb index 4fa6c505f5..57a394d171 100644 --- a/meta/recipes-kernel/linux/linux-yocto_6.6.bb +++ b/meta/recipes-kernel/linux/linux-yocto_6.6.bb @@ -18,17 +18,17 @@ KBRANCH:qemux86-64 ?= "v6.6/standard/base" KBRANCH:qemuloongarch64 ?= "v6.6/standard/base" KBRANCH:qemumips64 ?= "v6.6/standard/mti-malta64" -SRCREV_machine:qemuarm ?= "8a23d09163eedc42ed63f2741ae2fa7d8aa926aa" -SRCREV_machine:qemuarm64 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemuloongarch64 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemumips ?= "a0a00df5c1cd3cdd346f410f71998a120e284f78" -SRCREV_machine:qemuppc ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemuriscv64 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemuriscv32 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemux86 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemux86-64 ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" -SRCREV_machine:qemumips64 ?= "971214747a173452ae3ab4c6dcf1d91451b6e9be" -SRCREV_machine ?= "09118b4441395fadf233eec03e2b68e7d6d63cdd" +SRCREV_machine:qemuarm ?= "ff8331e10427c145659bf6a5f87b9109011159cf" +SRCREV_machine:qemuarm64 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemuloongarch64 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemumips ?= "afa3730deded0bc56f1470b59f65d86f20dfb256" +SRCREV_machine:qemuppc ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemuriscv64 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemuriscv32 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemux86 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemux86-64 ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" +SRCREV_machine:qemumips64 ?= "a93ff794461d9ba7ec5b02d482b60d9ca582e97f" +SRCREV_machine ?= "58e5c91d6701f62e0f72b1f10c2e9f14b2eb4480" SRCREV_meta ?= "8ab17895c185426442d80a60829619270f9ac51d" # set your preferred provider of linux-yocto to 'linux-yocto-upstream', and you'll |