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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:07 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:17 +0200
commit9260319e7411ff8281700a532caa436f40120ec4 (patch)
tree2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues/target_missing/host_missing/accel_missing/2327.toml
parent225caa38269323af1bfc2daadff5ec8bd930747f (diff)
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-id = 2327
-title = "negative shift exponent in cirrus_colorexpand_pattern_transp_0_24()"
-state = "opened"
-created_at = "2024-05-06T06:20:05.860Z"
-closed_at = "n/a"
-labels = ["Fuzzer", "device:graphics"]
-url = "https://gitlab.com/qemu-project/qemu/-/issues/2327"
-host-os = "Ubuntu 22.04"
-host-arch = "x86-64"
-qemu-version = "commit 248f6f62df073a3b4"
-guest-os = "n/a"
-guest-arch = "arm"
-description = """My fuzzer detected a runtime error in cirrus_colorexpand_pattern_transp_0_24()
-
-The stack trace is:
-
-```
-../hw/display/cirrus_vga_rop2.h:216:23: runtime error: shift exponent -2 is negative
-    #0 0x5589a028c89a in cirrus_colorexpand_pattern_transp_0_24 hw/display/cirrus_vga_rop2.h:216:23
-    #1 0x5589a031e239 in cirrus_bitblt_common_patterncopy hw/display/cirrus_vga.c:689:5
-    #2 0x5589a032735d in cirrus_bitblt_cputovideo_next hw/display/cirrus_vga.c:820:13
-    #3 0x5589a032cde9 in cirrus_linear_write hw/display/cirrus_vga.c:2365:13
-    #4 0x5589a2982823 in memory_region_write_accessor system/memory.c:497:5
-    #5 0x5589a2981f05 in access_with_adjusted_size system/memory.c:573:18
-    #6 0x5589a297fe69 in memory_region_dispatch_write system/memory.c:1521:16
-    #7 0x5589a2a2193e in flatview_write_continue_step system/physmem.c:2749:18
-    #8 0x5589a2a211d4 in flatview_write_continue system/physmem.c:2779:19
-    #9 0x5589a29f9cfb in flatview_write system/physmem.c:2810:12
-    #10 0x5589a29f97c8 in address_space_write system/physmem.c:2930:18
-...
-```"""
-reproduce = """Arguments:\\
-export QEMU_ARGS="-display none -machine accel=qtest, -m 512M -machine\\
-q35 -nodefaults -device cirrus-vga -display vnc=localhost:99 -L ../pc-bios/"\\
-The base addresses of memory regions:
-
-* cirrus-io, 0x3b0
-* cirrus-low-memory, 0xa0000
-* cirrus-linear-io, 0xe0000000
-* cirrus-bitblt-mmio, 0xe1000000
-* cirrus-mmio, 0xe2000000
-
-Reproducer:
-
-```
-writeb 0xe2000108 0x642a8d58
-writeb 0xe2000117 0x335af91c
-writeb 0xe2000118 0x765861ed
-writeb 0xe200010d 0x7c3af934
-writeb 0xe2000140 0x33f13baf
-clock_step
-writeb 0xe01f0e68 0x6ea3696c
-writeb 0xe13bc720 0x11bb09ba
-readb 0xe2000133
-writeb 0xe033629b 0x80f19dd
-writeb 0xe134bba7 0x1eb198f9
-readb 0xe2000680
-writeb 0xe2000b84 0x3f0591fc
-clock_step
-writeb 0xe003469e 0xdbd627e
-writeb 0xe114f2bc 0x41adfe48
-readb 0xe2000cde
-readb 0xb269d
-writeb 0xe1368066 0x3c9ab77
-readb 0xe12a7fe1
-writeb 0xe0191988 0x7e18b0d1
-EOF
-```"""
-additional = """Ack: Chuhong Yuan (hslester96@gmail.com)"""