BUG: TASK stack guard page was hit at ffffc90001d17fd8 (stack is ffffc90001d18000..ffffc90001d20000) Oops: stack guard page: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 1142 Comm: syz.1.228 Not tainted syzkaller #0 471281939cd7bfdfff4c6b6074d5d68627c837ba Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:update_stack_state+0x115/0x4b0 arch/x86/kernel/unwind_frame.c:-1 Code: 4b 10 4c 89 7d b0 4c 01 f8 48 89 85 78 ff ff ff 48 8d 53 18 48 8d 43 28 48 8d 73 20 48 89 b5 60 ff ff ff 4c 89 f6 48 c1 ee 03 <48> 89 b5 40 ff ff ff 48 89 8d 70 ff ff ff 48 c1 e9 03 48 89 8d 48 RSP: 0018:ffffc90001d17fe0 EFLAGS: 00010a02 RAX: ffffc90001d18150 RBX: ffffc90001d18128 RCX: ffffc90001d18138 RDX: ffffc90001d18140 RSI: 1ffff920003a3026 RDI: ffffc90001d18180 RBP: ffffc90001d180a0 R08: ffffc90001d18101 R09: 0000000000000000 R10: ffffc90001d18128 R11: fffff520003a3031 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90001d18130 R15: ffffc90001d18118 FS: 00007fa49406e6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90001d17fd8 CR3: 000000011bc1a000 CR4: 00000000003526b0 Call Trace: Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:update_stack_state+0x115/0x4b0 arch/x86/kernel/unwind_frame.c:-1 Code: 4b 10 4c 89 7d b0 4c 01 f8 48 89 85 78 ff ff ff 48 8d 53 18 48 8d 43 28 48 8d 73 20 48 89 b5 60 ff ff ff 4c 89 f6 48 c1 ee 03 <48> 89 b5 40 ff ff ff 48 89 8d 70 ff ff ff 48 c1 e9 03 48 89 8d 48 RSP: 0018:ffffc90001d17fe0 EFLAGS: 00010a02 RAX: ffffc90001d18150 RBX: ffffc90001d18128 RCX: ffffc90001d18138 RDX: ffffc90001d18140 RSI: 1ffff920003a3026 RDI: ffffc90001d18180 RBP: ffffc90001d180a0 R08: ffffc90001d18101 R09: 0000000000000000 R10: ffffc90001d18128 R11: fffff520003a3031 R12: 0000000000000000 R13: dffffc0000000000 R14: ffffc90001d18130 R15: ffffc90001d18118 FS: 00007fa49406e6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90001d17fd8 CR3: 000000011bc1a000 CR4: 00000000003526b0 ---------------- Code disassembly (best guess): 0: 4b 10 4c 89 7d rex.WXB adc %cl,0x7d(%r9,%r9,4) 5: b0 4c mov $0x4c,%al 7: 01 f8 add %edi,%eax 9: 48 89 85 78 ff ff ff mov %rax,-0x88(%rbp) 10: 48 8d 53 18 lea 0x18(%rbx),%rdx 14: 48 8d 43 28 lea 0x28(%rbx),%rax 18: 48 8d 73 20 lea 0x20(%rbx),%rsi 1c: 48 89 b5 60 ff ff ff mov %rsi,-0xa0(%rbp) 23: 4c 89 f6 mov %r14,%rsi 26: 48 c1 ee 03 shr $0x3,%rsi * 2a: 48 89 b5 40 ff ff ff mov %rsi,-0xc0(%rbp) <-- trapping instruction 31: 48 89 8d 70 ff ff ff mov %rcx,-0x90(%rbp) 38: 48 c1 e9 03 shr $0x3,%rcx 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 8d .byte 0x8d 3f: 48 rex.W