KASAN: null-ptr-deref Read in uncore_pmu_event

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
general protection fault in syscall_return_slowpath kernel	syz	inconclusive	done	1	1634d	1721d

syz

inconclusive

done

1634d

1721d

Title	Replies (including bot)	Last reply
KASAN: null-ptr-deref Read in uncore_pmu_event_add	0 (1)	2020/05/05 00:56

Title

Replies (including bot)

Last reply

KASAN: null-ptr-deref Read in uncore_pmu_event_add

0 (1)

2020/05/05 00:56


Created	Duration	User	Repo	Result
2020/08/03 03:02	17m	rkovhaev@gmail.com	upstream	OK
2020/07/13 02:19	9m	rkovhaev@gmail.com	linux-next	report log
2020/07/13 00:53	9m	rkovhaev@gmail.com	upstream	report log

================================================================== BUG: KASAN: null-ptr-deref in instrument_atomic_read include/linux/instrumented.h:56 [inline] BUG: KASAN: null-ptr-deref in test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] BUG: KASAN: null-ptr-deref in uncore_msr_perf_ctr arch/x86/events/intel/uncore.h:335 [inline] BUG: KASAN: null-ptr-deref in uncore_perf_ctr arch/x86/events/intel/uncore.h:378 [inline] BUG: KASAN: null-ptr-deref in uncore_assign_hw_event arch/x86/events/intel/uncore.c:230 [inline] BUG: KASAN: null-ptr-deref in uncore_pmu_event_add+0xa25/0x16d0 arch/x86/events/intel/uncore.c:602 Read of size 8 at addr 0000000000000000 by task syz-executor764/7073 CPU: 0 PID: 7073 Comm: syz-executor764 Not tainted 5.7.0-rc1-next-20200415-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 __kasan_report.cold+0x5/0x4d mm/kasan/report.c:515 kasan_report+0x33/0x50 mm/kasan/common.c:625 check_memory_region_inline mm/kasan/generic.c:187 [inline] check_memory_region+0x141/0x190 mm/kasan/generic.c:193 instrument_atomic_read include/linux/instrumented.h:56 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] uncore_msr_perf_ctr arch/x86/events/intel/uncore.h:335 [inline] uncore_perf_ctr arch/x86/events/intel/uncore.h:378 [inline] uncore_assign_hw_event arch/x86/events/intel/uncore.c:230 [inline] uncore_pmu_event_add+0xa25/0x16d0 arch/x86/events/intel/uncore.c:602 </IRQ> ================================================================== Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 7073 Comm: syz-executor764 Tainted: G B 5.7.0-rc1-next-20200415-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <IRQ> __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 end_report+0x4d/0x53 mm/kasan/report.c:103 __kasan_report.cold+0xd/0x4d mm/kasan/report.c:518 kasan_report+0x33/0x50 mm/kasan/common.c:625 check_memory_region_inline mm/kasan/generic.c:187 [inline] check_memory_region+0x141/0x190 mm/kasan/generic.c:193 instrument_atomic_read include/linux/instrumented.h:56 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:110 [inline] uncore_msr_perf_ctr arch/x86/events/intel/uncore.h:335 [inline] uncore_perf_ctr arch/x86/events/intel/uncore.h:378 [inline] uncore_assign_hw_event arch/x86/events/intel/uncore.c:230 [inline] uncore_pmu_event_add+0xa25/0x16d0 arch/x86/events/intel/uncore.c:602 </IRQ> Shutting down cpus with NMI Kernel Offset: disabled Rebooting in 86400 seconds..