nfs4: Unknown parameter 'śe' ================================================================== BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1aa1/0x22d0 Read of size 8 at addr ffff888047257540 by task syz-executor.3/10591 CPU: 0 PID: 10591 Comm: syz-executor.3 Not tainted 6.2.0-rc8-next-20230217 #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 Call Trace: dump_stack_lvl+0x91/0xf0 print_report+0xcc/0x620 kasan_report+0xc0/0xf0 unwind_next_frame+0x1aa1/0x22d0 arch_stack_walk+0x87/0xf0 stack_trace_save+0x90/0xd0 kasan_save_stack+0x22/0x50 __kasan_record_aux_stack+0x95/0xb0 __call_rcu_common.constprop.0+0x6a/0xa70 __kmem_cache_free+0x8b/0x2f0 bio_endio+0x568/0x700 blk_update_request+0x398/0x1490 scsi_end_request+0x7a/0xa20 scsi_io_completion+0xc0/0x2050 scsi_complete+0x118/0x560 blk_complete_reqs+0xb2/0xf0 __do_softirq+0x258/0x8a2 __irq_exit_rcu+0xcc/0x110 irq_exit_rcu+0x9/0x20 sysvec_call_function_single+0x6e/0x90 asm_sysvec_call_function_single+0x1a/0x20 RIP: 0010:strlen+0x69/0xa0 Code: df 48 89 e8 48 83 c0 01 48 89 c2 48 89 c1 48 c1 ea 03 83 e1 07 0f b6 14 1a 38 ca 7f 04 84 d2 75 27 80 38 00 75 de 48 83 c4 08 <48> 29 e8 5b 5d e9 11 b8 05 00 48 83 c4 08 31 c0 5b 5d e9 04 b8 05 RSP: 0018:ffff888047257498 EFLAGS: 00000282 RAX: ffffffff848e9c24 RBX: dffffc0000000000 RCX: 0000000000000004 RDX: 0000000000000005 RSI: ffff88806ce35700 RDI: ffffffff848e9c20 RBP: ffffffff848e9c20 R08: 0000000000000000 R09: 0000000000000001 R10: fffffbfff0ba4bca R11: 0000000000000001 R12: 0000000000000000 R13: 1ffff11008e4ae9d R14: ffff888047257568 R15: ffffffff8550e200 asm_sysvec_apic_timer_interrupt+0x1a/0x20 RIP: 0003:find_held_lock+0x2c/0x110 RSP: 81660a16:ffff88806ce35000 EFLAGS: 1ffff11008e4aeb1 ORIG_RAX: 0000000000000002 RAX: 0000000000000001 RBX: ffff88806ce35700 RCX: 0000000000000001 RDX: 0000000000000001 RSI: ffffffff8447645f RDI: 0000000000000246 RBP: 1ffff11008e4ae9d R08: 0000000000000000 R09: ffffffff812b6430 R10: ffffffff851c50f8 R11: 0000000041b58ab3 R12: ffff88806ce35718 R13: 0000000000000000 R14: ffff88804438f010 R15: 00000000000001fe The buggy address belongs to stack of task syz-executor.3/10591 and is located at offset 88 in frame: perf_trace_lock_acquire+0x0/0x500 This frame has 2 objects: [48, 52) 'rctx' [64, 72) '__regs' The buggy address belongs to the physical page: page:000000008619c51f refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x47257 flags: 0x100000000000000(node=0|zone=1) raw: 0100000000000000 0000000000000000 ffffea00011c95c8 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888047257400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888047257480: 00 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 >ffff888047257500: f1 f1 f1 04 f2 00 f3 f3 f3 00 00 00 00 00 00 00 ^ ffff888047257580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888047257600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== ---------------- Code disassembly (best guess): 0: df 48 89 fisttps -0x77(%rax) 3: e8 48 83 c0 01 callq 0x1c08350 8: 48 89 c2 mov %rax,%rdx b: 48 89 c1 mov %rax,%rcx e: 48 c1 ea 03 shr $0x3,%rdx 12: 83 e1 07 and $0x7,%ecx 15: 0f b6 14 1a movzbl (%rdx,%rbx,1),%edx 19: 38 ca cmp %cl,%dl 1b: 7f 04 jg 0x21 1d: 84 d2 test %dl,%dl 1f: 75 27 jne 0x48 21: 80 38 00 cmpb $0x0,(%rax) 24: 75 de jne 0x4 26: 48 83 c4 08 add $0x8,%rsp * 2a: 48 29 e8 sub %rbp,%rax <-- trapping instruction 2d: 5b pop %rbx 2e: 5d pop %rbp 2f: e9 11 b8 05 00 jmpq 0x5b845 34: 48 83 c4 08 add $0x8,%rsp 38: 31 c0 xor %eax,%eax 3a: 5b pop %rbx 3b: 5d pop %rbp 3c: e9 .byte 0xe9 3d: 04 b8 add $0xb8,%al 3f: 05 .byte 0x5