BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1346/0x2230 arch/x86/kernel/unwind_orc.c:541 Read of size 8 at addr ffff88819c8976a8 by task syz-executor.3/3025 CPU: 1 PID: 3025 Comm: syz-executor.3 Not tainted 5.4.35-syzkaller-00731-ge32f5ec4d846 #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+0x14a/0x1ce lib/dump_stack.c:118 print_address_description+0x93/0x620 mm/kasan/report.c:374 __kasan_report+0x16d/0x1e0 mm/kasan/report.c:506 kasan_report+0x34/0x60 mm/kasan/common.c:634 unwind_next_frame+0x1346/0x2230 arch/x86/kernel/unwind_orc.c:541 arch_stack_walk+0xf4/0x120 arch/x86/kernel/stacktrace.c:25 stack_trace_save_tsk+0x2e7/0x490 kernel/stacktrace.c:151 proc_pid_stack+0x12f/0x1f0 fs/proc/base.c:455 proc_single_show+0xd3/0x130 fs/proc/base.c:757 seq_read+0x4aa/0xd30 fs/seq_file.c:229 do_loop_readv_writev fs/read_write.c:717 [inline] do_iter_read+0x43b/0x550 fs/read_write.c:938 vfs_readv fs/read_write.c:1000 [inline] do_preadv+0x213/0x350 fs/read_write.c:1092 do_syscall_64+0xcb/0x150 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f9ed656d469 Code: 00 f3 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 8b 0d ff 49 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007f9ed6bfadb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 000000000044c820 RCX: 00007f9ed656d469 RDX: 000000000000037d RSI: 0000000020000500 RDI: 0000000000000009 RBP: 00000000006ac0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000085c R14: 000000000041d78f R15: 00007f9ed6bfb5c0 The buggy address belongs to the page: page:ffffea00067225c0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 flags: 0x8000000000000000() raw: 8000000000000000 0000000000000000 ffffea00067225c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff88819c897580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88819c897600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff88819c897680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff88819c897700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff88819c897780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================