summary refs log tree commit diff stats
path: root/results/classifier/semantic-bugs/1820686
diff options
context:
space:
mode:
authorChristian Krinitsin <mail@krinitsin.com>2025-07-05 20:00:38 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-07-05 20:00:38 +0200
commit96049c939b1916d80532630d63c14e04d5244f1d (patch)
tree7fb9df428f074078e714f1e038210cdff887185a /results/classifier/semantic-bugs/1820686
parent40bbb77d4dfebff4f99c2f90b2c0db737b0ecc5a (diff)
downloadqemu-analysis-96049c939b1916d80532630d63c14e04d5244f1d.tar.gz
qemu-analysis-96049c939b1916d80532630d63c14e04d5244f1d.zip
lock user-mode and semantic-bugs
Diffstat (limited to 'results/classifier/semantic-bugs/1820686')
-rw-r--r--results/classifier/semantic-bugs/182068622
1 files changed, 2 insertions, 20 deletions
diff --git a/results/classifier/semantic-bugs/1820686 b/results/classifier/semantic-bugs/1820686
index f7fd19f6d..4f823b4f1 100644
--- a/results/classifier/semantic-bugs/1820686
+++ b/results/classifier/semantic-bugs/1820686
@@ -1,25 +1,7 @@
-instruction: 0.949
-device: 0.824
-network: 0.809
-other: 0.742
-socket: 0.724
-semantic: 0.691
-vnc: 0.683
-mistranslation: 0.678
-graphic: 0.598
-boot: 0.498
-KVM: 0.321
-assembly: 0.305
+
 
 risc-v: 'c.unimp' instruction decoded as 'c.addi4spn fp, 0'
 
 QEMU 3.1 incorrectly decodes the "c.unimp" instruction (opcode 0x0000) as an "addi4spn fp, 0" when either of the two following bytes are non-zero. This is because the ctx->opcode value used when decoding the instruction is actually filled with a 32-bit load (to handle normal uncompressed instructions) but when a compressed instruction is found only the low 16 bits are valid. Other reserved/illegal bit patterns with the addi4spn opcode are also incorrectly decoded.
 
-I believe that the switch to decodetree on master happened to fix this issue, but hopefully it is helpful to have this recorded somewhere. I've included a simple one line patch if anyone wants to backport this.
-
-
-
-Thanks.  If you spin a full patch (ie, "git commit -s" and then "git show") I can drop it on riscv-qemu-3.1, our backports branch.  Otherwise hopefully we got the bug via the decodetree conversion.
-
-Since this bug isn't present in the decodetree version of the riscv decoder, we might as well just close this as fix-released; we won't be doing more point-releases of QEMU versions as old as 3.1.
-
+I believe that the switch to decodetree on master happened to fix this issue, but hopefully it is helpful to have this recorded somewhere. I've included a simple one line patch if anyone wants to backport this.
\ No newline at end of file