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| author | Philippe Mathieu-Daudé <philmd@linaro.org> | 2023-02-07 09:02:05 +0100 |
|---|---|---|
| committer | Cédric Le Goater <clg@kaod.org> | 2023-02-07 09:02:05 +0100 |
| commit | ed5d9774c624918977b2f274bb2e47c74047102d (patch) | |
| tree | e961b5eac39925f7b7b98f3061149de7f8384709 /hw | |
| parent | f8ad895824860b1c18f1fd64e566d66ce70a61cd (diff) | |
| download | qemu-ed5d9774c624918977b2f274bb2e47c74047102d.zip qemu-ed5d9774c624918977b2f274bb2e47c74047102d.tar.gz qemu-ed5d9774c624918977b2f274bb2e47c74047102d.tar.bz2 | |
hw/misc/aspeed_hace: Do not crash if address_space_map() failed
address_space_map() can fail:
uart:~$ hash test
sha256_test
tv[0]:
Segmentation fault: 11
Thread 3 "qemu-system-arm" received signal SIGSEGV, Segmentation fault.
gen_acc_mode_iov (req_len=0x7ffff18b7778, id=<optimized out>, iov=0x7ffff18b7780, s=0x555556ce0bd0)
at ../hw/misc/aspeed_hace.c:171
171 if (has_padding(s, &iov[id], *req_len, &total_msg_len, &pad_offset)) {
(gdb) bt
#0 gen_acc_mode_iov (req_len=0x7ffff18b7778, id=<optimized out>, iov=0x7ffff18b7780, s=0x555556ce0bd0)
at ../hw/misc/aspeed_hace.c:171
#1 do_hash_operation (s=s@entry=0x555556ce0bd0, algo=3, sg_mode=sg_mode@entry=true, acc_mode=acc_mode@entry=true)
at ../hw/misc/aspeed_hace.c:224
#2 0x00005555559bdbb8 in aspeed_hace_write (opaque=<optimized out>, addr=12, data=262488, size=<optimized out>)
at ../hw/misc/aspeed_hace.c:358
This change doesn't fix much, but at least the guest
can't crash QEMU anymore. Instead it is still usable:
uart:~$ hash test
sha256_test
tv[0]:hash_final error
sha384_test
tv[0]:hash_final error
sha512_test
tv[0]:hash_final error
[00:00:06.278,000] <err> hace_global: HACE poll timeout
[00:00:09.324,000] <err> hace_global: HACE poll timeout
[00:00:12.261,000] <err> hace_global: HACE poll timeout
uart:~$
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Delevoryas <peter@pjd.dev>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/misc/aspeed_hace.c | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/hw/misc/aspeed_hace.c b/hw/misc/aspeed_hace.c index ac21be3..12a761f 100644 --- a/hw/misc/aspeed_hace.c +++ b/hw/misc/aspeed_hace.c @@ -193,6 +193,7 @@ static void do_hash_operation(AspeedHACEState *s, int algo, bool sg_mode, size_t digest_len = 0; int niov = 0; int i; + void *haddr; if (sg_mode) { uint32_t len = 0; @@ -217,9 +218,13 @@ static void do_hash_operation(AspeedHACEState *s, int algo, bool sg_mode, addr &= SG_LIST_ADDR_MASK; plen = len & SG_LIST_LEN_MASK; - iov[i].iov_base = address_space_map(&s->dram_as, addr, &plen, false, - MEMTXATTRS_UNSPECIFIED); - + haddr = address_space_map(&s->dram_as, addr, &plen, false, + MEMTXATTRS_UNSPECIFIED); + if (haddr == NULL) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: qcrypto failed\n", __func__); + return; + } + iov[i].iov_base = haddr; if (acc_mode) { niov = gen_acc_mode_iov(s, iov, i, &plen); @@ -230,10 +235,14 @@ static void do_hash_operation(AspeedHACEState *s, int algo, bool sg_mode, } else { hwaddr len = s->regs[R_HASH_SRC_LEN]; + haddr = address_space_map(&s->dram_as, s->regs[R_HASH_SRC], + &len, false, MEMTXATTRS_UNSPECIFIED); + if (haddr == NULL) { + qemu_log_mask(LOG_GUEST_ERROR, "%s: qcrypto failed\n", __func__); + return; + } + iov[0].iov_base = haddr; iov[0].iov_len = len; - iov[0].iov_base = address_space_map(&s->dram_as, s->regs[R_HASH_SRC], - &len, false, - MEMTXATTRS_UNSPECIFIED); i = 1; if (s->iov_count) { |