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arm64 fixes for -rc1

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- Fix an incorrect mask in the CXL PMU driver
 
 - Fix a regression in early parsing of the kernel command line
 
 - Fix an IP checksum OoB access reported by syzbot
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "The main one is a fix for a broken strscpy() conversion that landed in
  the merge window and broke early parsing of the kernel command line.

   - Fix an incorrect mask in the CXL PMU driver

   - Fix a regression in early parsing of the kernel command line

   - Fix an IP checksum OoB access reported by syzbot"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: csum: Fix OoB access in IP checksum code for negative lengths
  arm64/sysreg: Fix broken strncpy() -> strscpy() conversion
  perf: CXL: fix mismatched number of counters mask
This commit is contained in:
Linus Torvalds 2023-09-08 12:48:37 -07:00
commit ca9c7abf95
3 changed files with 5 additions and 5 deletions
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6
arch/arm64/kernel/idreg-override.c
View File

@ -262,9 +262,9 @@ static __init void __parse_cmdline(const char *cmdline, bool parse_aliases)
if (!len)
return;
len = strscpy(buf, cmdline, ARRAY_SIZE(buf));
if (len == -E2BIG)
len = ARRAY_SIZE(buf) - 1;
len = min(len, ARRAY_SIZE(buf) - 1);
memcpy(buf, cmdline, len);
buf[len] = '\0';
if (strcmp(buf, "--") == 0)
return;

2
arch/arm64/lib/csum.c
View File

@ -24,7 +24,7 @@ unsigned int __no_sanitize_address do_csum(const unsigned char *buff, int len)
const u64 *ptr;
u64 data, sum64 = 0;
if (unlikely(len == 0))
if (unlikely(len <= 0))
return 0;
offset = (unsigned long)buff & 7;

2
drivers/perf/cxl_pmu.c
View File

@ -25,7 +25,7 @@
#include "../cxl/pmu.h"
#define CXL_PMU_CAP_REG 0x0
#define CXL_PMU_CAP_NUM_COUNTERS_MSK GENMASK_ULL(4, 0)
#define CXL_PMU_CAP_NUM_COUNTERS_MSK GENMASK_ULL(5, 0)
#define CXL_PMU_CAP_COUNTER_WIDTH_MSK GENMASK_ULL(15, 8)
#define CXL_PMU_CAP_NUM_EVN_CAP_REG_SUP_MSK GENMASK_ULL(24, 20)
#define CXL_PMU_CAP_FILTERS_SUP_MSK GENMASK_ULL(39, 32)