================================================================== 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 ffff888070c0ea98 by task syz-executor.4/835 CPU: 0 PID: 835 Comm: syz-executor.4 Not tainted 5.4.35-syzkaller-00725-g7f84f8f18418 #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: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f67d72d5c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00000000004fa1c0 RCX: 000000000045c829 RDX: 000000000000037d RSI: 0000000020000500 RDI: 0000000000000007 RBP: 000000000078c0e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 000000000000085c R14: 00000000004cb1c7 R15: 00007f67d72d66d4 The buggy address belongs to the page: page:ffffea0001c30380 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 flags: 0x4000000000000000() raw: 4000000000000000 dead000000000100 dead000000000122 0000000000000000 raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888070c0e980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888070c0ea00: f1 f1 f1 f1 00 00 00 f2 f2 f2 f2 f2 00 00 00 00 >ffff888070c0ea80: 00 f3 f3 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 ^ ffff888070c0eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888070c0eb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================