motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-09-01 14:31:52 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

accel/tcg: Pass last not end to page_set_flags

Browse source 
Pass the address of the last byte to be changed, rather than
the first address past the last byte.  This avoids overflow
when the last page of the address space is involved.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1528
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2023-03-06 01:51:09 +03:00
parent 2f7828b572
commit 49840a4a09
6 changed files with 27 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

4
linux-user/syscall.c
View file

@ -4595,7 +4595,7 @@ static inline abi_ulong do_shmat(CPUArchState *cpu_env,
}
raddr=h2g((unsigned long)host_raddr);
page_set_flags(raddr, raddr + shm_info.shm_segsz,
page_set_flags(raddr, raddr + shm_info.shm_segsz - 1,
PAGE_VALID | PAGE_RESET | PAGE_READ |
(shmflg & SHM_RDONLY ? 0 : PAGE_WRITE));
@ -4625,7 +4625,7 @@ static inline abi_long do_shmdt(abi_ulong shmaddr)
for (i = 0; i < N_SHM_REGIONS; ++i) {
if (shm_regions[i].in_use && shm_regions[i].start == shmaddr) {
shm_regions[i].in_use = false;
page_set_flags(shmaddr, shmaddr + shm_regions[i].size, 0);
page_set_flags(shmaddr, shmaddr + shm_regions[i].size - 1, 0);
break;
}
}