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author | YueHaibing <yuehaibing@huawei.com> | 2019-04-20 12:05:54 +0800 |
---|---|---|
committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-05-13 20:32:49 -0400 |
commit | c09581a52765a85f19fc35340127396d5e3379cc (patch) | |
tree | 2eae38874b20605d3a795e6347ec1eeaf60b4bb0 /drivers/scsi | |
parent | 5386a4e6c7fecd282d265a24d930a74ba3c5917b (diff) | |
download | linux-stable-c09581a52765a85f19fc35340127396d5e3379cc.tar.gz linux-stable-c09581a52765a85f19fc35340127396d5e3379cc.tar.bz2 linux-stable-c09581a52765a85f19fc35340127396d5e3379cc.zip |
scsi: qedi: remove memset/memcpy to nfunc and use func instead
KASAN reports this:
BUG: KASAN: global-out-of-bounds in qedi_dbg_err+0xda/0x330 [qedi]
Read of size 31 at addr ffffffffc12b0ae0 by task syz-executor.0/2429
CPU: 0 PID: 2429 Comm: syz-executor.0 Not tainted 5.0.0-rc7+ #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.10.2-1ubuntu1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0xfa/0x1ce lib/dump_stack.c:113
print_address_description+0x1c4/0x270 mm/kasan/report.c:187
kasan_report+0x149/0x18d mm/kasan/report.c:317
memcpy+0x1f/0x50 mm/kasan/common.c:130
qedi_dbg_err+0xda/0x330 [qedi]
? 0xffffffffc12d0000
qedi_init+0x118/0x1000 [qedi]
? 0xffffffffc12d0000
? 0xffffffffc12d0000
? 0xffffffffc12d0000
do_one_initcall+0xfa/0x5ca init/main.c:887
do_init_module+0x204/0x5f6 kernel/module.c:3460
load_module+0x66b2/0x8570 kernel/module.c:3808
__do_sys_finit_module+0x238/0x2a0 kernel/module.c:3902
do_syscall_64+0x147/0x600 arch/x86/entry/common.c:290
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x462e99
Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f2d57e55c58 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
RAX: ffffffffffffffda RBX: 000000000073bfa0 RCX: 0000000000462e99
RDX: 0000000000000000 RSI: 00000000200003c0 RDI: 0000000000000003
RBP: 00007f2d57e55c70 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2d57e566bc
R13: 00000000004bcefb R14: 00000000006f7030 R15: 0000000000000004
The buggy address belongs to the variable:
__func__.67584+0x0/0xffffffffffffd520 [qedi]
Memory state around the buggy address:
ffffffffc12b0980: fa fa fa fa 00 04 fa fa fa fa fa fa 00 00 05 fa
ffffffffc12b0a00: fa fa fa fa 00 00 04 fa fa fa fa fa 00 05 fa fa
> ffffffffc12b0a80: fa fa fa fa 00 06 fa fa fa fa fa fa 00 02 fa fa
^
ffffffffc12b0b00: fa fa fa fa 00 00 04 fa fa fa fa fa 00 00 03 fa
ffffffffc12b0b80: fa fa fa fa 00 00 02 fa fa fa fa fa 00 00 04 fa
Currently the qedi_dbg_* family of functions can overrun the end of the
source string if it is less than the destination buffer length because of
the use of a fixed sized memcpy. Remove the memset/memcpy calls to nfunc
and just use func instead as it is always a null terminated string.
Reported-by: Hulk Robot <hulkci@huawei.com>
Fixes: ace7f46ba5fd ("scsi: qedi: Add QLogic FastLinQ offload iSCSI driver framework.")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi')
-rw-r--r-- | drivers/scsi/qedi/qedi_dbg.c | 32 |
1 files changed, 8 insertions, 24 deletions
diff --git a/drivers/scsi/qedi/qedi_dbg.c b/drivers/scsi/qedi/qedi_dbg.c index 8fd28b056f73..3383314a3882 100644 --- a/drivers/scsi/qedi/qedi_dbg.c +++ b/drivers/scsi/qedi/qedi_dbg.c @@ -16,10 +16,6 @@ qedi_dbg_err(struct qedi_dbg_ctx *qedi, const char *func, u32 line, { va_list va; struct va_format vaf; - char nfunc[32]; - - memset(nfunc, 0, sizeof(nfunc)); - memcpy(nfunc, func, sizeof(nfunc) - 1); va_start(va, fmt); @@ -28,9 +24,9 @@ qedi_dbg_err(struct qedi_dbg_ctx *qedi, const char *func, u32 line, if (likely(qedi) && likely(qedi->pdev)) pr_err("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev), - nfunc, line, qedi->host_no, &vaf); + func, line, qedi->host_no, &vaf); else - pr_err("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf); + pr_err("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf); va_end(va); } @@ -41,10 +37,6 @@ qedi_dbg_warn(struct qedi_dbg_ctx *qedi, const char *func, u32 line, { va_list va; struct va_format vaf; - char nfunc[32]; - - memset(nfunc, 0, sizeof(nfunc)); - memcpy(nfunc, func, sizeof(nfunc) - 1); va_start(va, fmt); @@ -56,9 +48,9 @@ qedi_dbg_warn(struct qedi_dbg_ctx *qedi, const char *func, u32 line, if (likely(qedi) && likely(qedi->pdev)) pr_warn("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev), - nfunc, line, qedi->host_no, &vaf); + func, line, qedi->host_no, &vaf); else - pr_warn("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf); + pr_warn("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf); ret: va_end(va); @@ -70,10 +62,6 @@ qedi_dbg_notice(struct qedi_dbg_ctx *qedi, const char *func, u32 line, { va_list va; struct va_format vaf; - char nfunc[32]; - - memset(nfunc, 0, sizeof(nfunc)); - memcpy(nfunc, func, sizeof(nfunc) - 1); va_start(va, fmt); @@ -85,10 +73,10 @@ qedi_dbg_notice(struct qedi_dbg_ctx *qedi, const char *func, u32 line, if (likely(qedi) && likely(qedi->pdev)) pr_notice("[%s]:[%s:%d]:%d: %pV", - dev_name(&qedi->pdev->dev), nfunc, line, + dev_name(&qedi->pdev->dev), func, line, qedi->host_no, &vaf); else - pr_notice("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf); + pr_notice("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf); ret: va_end(va); @@ -100,10 +88,6 @@ qedi_dbg_info(struct qedi_dbg_ctx *qedi, const char *func, u32 line, { va_list va; struct va_format vaf; - char nfunc[32]; - - memset(nfunc, 0, sizeof(nfunc)); - memcpy(nfunc, func, sizeof(nfunc) - 1); va_start(va, fmt); @@ -115,9 +99,9 @@ qedi_dbg_info(struct qedi_dbg_ctx *qedi, const char *func, u32 line, if (likely(qedi) && likely(qedi->pdev)) pr_info("[%s]:[%s:%d]:%d: %pV", dev_name(&qedi->pdev->dev), - nfunc, line, qedi->host_no, &vaf); + func, line, qedi->host_no, &vaf); else - pr_info("[0000:00:00.0]:[%s:%d]: %pV", nfunc, line, &vaf); + pr_info("[0000:00:00.0]:[%s:%d]: %pV", func, line, &vaf); ret: va_end(va); |