diff options
Diffstat (limited to 'results/scraper/launchpad-without-comments/1907909')
| -rw-r--r-- | results/scraper/launchpad-without-comments/1907909 | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/results/scraper/launchpad-without-comments/1907909 b/results/scraper/launchpad-without-comments/1907909 new file mode 100644 index 00000000..0d08f1ad --- /dev/null +++ b/results/scraper/launchpad-without-comments/1907909 @@ -0,0 +1,55 @@ +assertion failure in am53c974 + +Hello, + +Using hypervisor fuzzer, hyfuzz, I found an assertion failure through am53c974 emulator. + +A malicious guest user/process could use this flaw to abort the QEMU process on the host, resulting in a denial of service. + +This was found in version 5.2.0 (master) + + +qemu-system-i386: ../hw/scsi/esp.c:402: void esp_do_dma(ESPState *): Assertion `s->cmdlen <= sizeof(s->cmdbuf) && len <= sizeof(s->cmdbuf) - s->cmdlen' failed. + +#0 __GI_raise (sig=sig@entry=0x6) at ../sysdeps/unix/sysv/linux/raise.c:51 +51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. +[Current thread is 1 (Thread 0x7fdd25dc4700 (LWP 28983))] +gdb-peda$ bt +#0 0x00007fdd3f8b5f47 in __GI_raise (sig=sig@entry=0x6) at ../sysdeps/unix/sysv/linux/raise.c:51 +#1 0x00007fdd3f8b78b1 in __GI_abort () at abort.c:79 +#2 0x00007fdd3f8a742a in __assert_fail_base (fmt=0x7fdd3fa2ea38 "%s%s%s:%u: %s%sAssertion `%s' failed.\\n%n", assertion=assertion@entry=0x55b3e11a51c6 "s->cmdlen <= sizeof(s->cmdbuf) && len <= sizeof(s->cmdbuf) - s->cmdlen", file=file@entry=0x55b3e11a4f73 "../hw/scsi/esp.c", line=line@entry=0x192, function=function@entry=0x55b3e11a520d "void esp_do_dma(ESPState *)") at assert.c:92 +#3 0x00007fdd3f8a74a2 in __GI___assert_fail (assertion=0x55b3e11a51c6 "s->cmdlen <= sizeof(s->cmdbuf) && len <= sizeof(s->cmdbuf) - s->cmdlen", file=0x55b3e11a4f73 "../hw/scsi/esp.c", line=0x192, function=0x55b3e11a520d "void esp_do_dma(ESPState *)") at assert.c:101 +#4 0x000055b3e0941441 in esp_do_dma (s=0x55b3e49d1c88) at ../hw/scsi/esp.c:401 +#5 0x000055b3e0944261 in handle_ti (s=0x55b3e49d1c88) at ../hw/scsi/esp.c:549 +#6 0x000055b3e093fdf9 in esp_dma_enable (s=0x55b3e49d1c88, irq=<optimized out>, level=<optimized out>) + at ../hw/scsi/esp.c:79 +#7 0x000055b3e0897930 in esp_pci_dma_write (pci=<optimized out>, saddr=<optimized out>, val=<optimized +out>) at ../hw/scsi/esp-pci.c:83 +#8 0x000055b3e0897930 in esp_pci_io_write (opaque=<optimized out>, addr=<optimized out>, val=0xcf, size=0x4) at ../hw/scsi/esp-pci.c:209 +#9 0x000055b3e0e8f798 in memory_region_write_accessor (mr=<optimized out>, addr=<optimized out>, value=<optimized out>, size=<optimized out>, shift=<optimized out>, mask=<optimized out>, attrs=...) + at ../softmmu/memory.c:491 +#10 0x000055b3e0e8f58e in access_with_adjusted_size (addr=<optimized out>, value=<optimized out>, size=<optimized out>, access_size_min=<optimized out>, access_size_max=<optimized out>, access_fn=<optimized out>, mr=<optimized out>, attrs=...) at ../softmmu/memory.c:552 +#11 0x000055b3e0e8f58e in memory_region_dispatch_write (mr=0x55b3e49d1b70, addr=<optimized out>, data=<optimized out>, op=<optimized out>, attrs=...) at ../softmmu/memory.c:1501 +#12 0x000055b3e0e21541 in address_space_stb (as=<optimized out>, addr=<optimized out>, val=0xffffffcf, attrs=..., result=0x0) at ../memory_ldst.c.inc:382 +#13 0x00007fdcd84a4a7f in code_gen_buffer () +#14 0x000055b3e0e57da0 in cpu_tb_exec (cpu=0x55b3e3c33650, itb=<optimized out>) + at ../accel/tcg/cpu-exec.c:178 +#15 0x000055b3e0e589eb in cpu_loop_exec_tb (tb=<optimized out>, cpu=<optimized out>, last_tb=<optimized +out>, tb_exit=<optimized out>) at ../accel/tcg/cpu-exec.c:658 +#16 0x000055b3e0e589eb in cpu_exec (cpu=0x55b3e3c33650) at ../accel/tcg/cpu-exec.c:771 +#17 0x000055b3e0e87b9f in tcg_cpu_exec (cpu=<optimized out>) at ../accel/tcg/tcg-cpus.c:243 +#18 0x000055b3e0e87b9f in tcg_cpu_thread_fn (arg=0x55b3e3c33650) at ../accel/tcg/tcg-cpus.c:427 +#19 0x000055b3e115f775 in qemu_thread_start (args=<optimized out>) at ../util/qemu-thread-posix.c:521 +#20 0x00007fdd3fc6f6db in start_thread (arg=0x7fdd25dc4700) at pthread_create.c:463 +#21 0x00007fdd3f998a3f in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95 + +To reproduce the assertion failure, please run the QEMU with the following command line. + + +$ ./qemu-system-i386 -m 512 -drive file=./hyfuzz.img,index=0,media=disk,format=raw -device am53c974,id=scsi -device scsi-hd,drive=SysDisk -drive id=SysDisk,if=none,file=./disk.img + +Please let me know if I can provide any further info. + +Thank you. + +- Cheolwoo, Myung (Seoul National University) \ No newline at end of file |