KASAN: user-memory-access Read in vdso

Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported
general protection fault in perf_misc_flags perf				7	1300d	1307d

1300d

1307d

Title	Replies (including bot)	Last reply
KASAN: user-memory-access Read in vdso_fault	1 (2)	2020/09/25 12:17

================================================================== BUG: KASAN: user-memory-access in vdso_fault+0xc1/0x1b0 arch/x86/entry/vdso/vma.c:67 Read of size 8 at addr 000000001953fc48 by task systemd-udevd/9883 CPU: 0 PID: 9883 Comm: systemd-udevd Not tainted 5.9.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1d6/0x29e lib/dump_stack.c:118 __kasan_report mm/kasan/report.c:517 [inline] kasan_report+0x151/0x1d0 mm/kasan/report.c:530 vdso_fault+0xc1/0x1b0 arch/x86/entry/vdso/vma.c:67 __do_fault+0x138/0x3b0 mm/memory.c:3450 do_read_fault+0x5a6/0x9e0 mm/memory.c:3843 do_fault mm/memory.c:3971 [inline] handle_pte_fault mm/memory.c:4211 [inline] __handle_mm_fault mm/memory.c:4346 [inline] handle_mm_fault+0x1d73/0x29a0 mm/memory.c:4444 do_user_addr_fault+0x515/0xa90 arch/x86/mm/fault.c:1372 handle_page_fault arch/x86/mm/fault.c:1429 [inline] exc_page_fault+0x129/0x240 arch/x86/mm/fault.c:1482 asm_exc_page_fault+0x1e/0x30 arch/x86/include/asm/idtentry.h:538 RIP: 0033:0x7ffedaddb630 Code: Bad RIP value. RSP: 002b:00007ffedad997b8 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000015 RDX: 0000000058585858 RSI: 0000000000000000 RDI: 00007ffedad997e0 RBP: 0000000000000000 R08: 000000000000fefe R09: 0000000000000030 R10: 0000000000000000 R11: 0000000000000206 R12: 000055e855d83675 R13: 00007ffedad99938 R14: 0000000000080000 R15: 000055e855d83660 ==================================================================