================================================================== BUG: KASAN: out-of-bounds in csd_lock_record+0xcb/0xe0 kernel/smp.c:118 Read of size 8 at addr ffffc90006d3f550 by task syz-executor.2/21236 CPU: 0 PID: 21236 Comm: syz-executor.2 Not tainted 5.8.0-rc3-next-20200703-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+0x18f/0x20d lib/dump_stack.c:118 print_address_description.constprop.0.cold+0x5/0x436 mm/kasan/report.c:383 __kasan_report mm/kasan/report.c:513 [inline] kasan_report.cold+0x1f/0x37 mm/kasan/report.c:530 csd_lock_record+0xcb/0xe0 kernel/smp.c:118 flush_smp_call_function_queue+0x285/0x730 kernel/smp.c:391 __sysvec_call_function_single+0x98/0x490 arch/x86/kernel/smp.c:248 asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 __run_on_irqstack arch/x86/include/asm/irq_stack.h:22 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:48 [inline] sysvec_call_function_single+0xe0/0x120 arch/x86/kernel/smp.c:243 asm_sysvec_call_function_single+0x12/0x20 arch/x86/include/asm/idtentry.h:604 RIP: 0010:tomoyo_check_acl+0xbe/0x410 security/tomoyo/domain.c:173 Code: 28 25 11 fe 48 8d 7b 18 48 89 f8 48 89 fa 48 c1 e8 03 83 e2 07 0f b6 04 28 38 d0 7f 08 84 c0 0f 85 d7 02 00 00 44 0f b6 73 18 <31> ff 44 89 f6 e8 38 21 11 fe 45 84 f6 0f 85 5c 01 00 00 e8 ea 24 RSP: 0018:ffffc9000784f758 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff8880a8844b00 RCX: ffffc9000de2b000 RDX: 0000000000000000 RSI: ffffffff8362e1d8 RDI: ffff8880a8844b18 RBP: dffffc0000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000002 R11: 0000000000000000 R12: ffff8880a7394190 R13: ffffc9000784f848 R14: 0000000000000000 R15: 0000000000000000 tomoyo_path_permission security/tomoyo/file.c:586 [inline] tomoyo_path_permission+0x1f5/0x360 security/tomoyo/file.c:573 tomoyo_check_open_permission+0x33e/0x380 security/tomoyo/file.c:777 tomoyo_file_open security/tomoyo/tomoyo.c:313 [inline] tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:308 security_file_open+0x52/0x3f0 security/security.c:1574 do_dentry_open+0x358/0x11b0 fs/open.c:809 do_open fs/namei.c:3249 [inline] path_openat+0x1bb9/0x2750 fs/namei.c:3366 do_filp_open+0x17e/0x3c0 fs/namei.c:3393 do_sys_openat2+0x16f/0x3b0 fs/open.c:1173 do_sys_open fs/open.c:1189 [inline] __do_sys_openat fs/open.c:1203 [inline] __se_sys_openat fs/open.c:1198 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1198 do_syscall_64+0x60/0xe0 arch/x86/entry/common.c:367 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45cb29 Code: Bad RIP value. RSP: 002b:00007fb03a22fc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00000000004f8860 RCX: 000000000045cb29 RDX: 0000000000000080 RSI: 0000000020000000 RDI: ffffffffffffff9c RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000007c7 R14: 00000000004cab45 R15: 00007fb03a2306d4 Memory state around the buggy address: ffffc90006d3f400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90006d3f480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90006d3f500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90006d3f580: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 ffffc90006d3f600: f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================