general protection fault, probably for non-canonical address 0xdffffc0020008013: 0000 [#1] PREEMPT SMP KASAN KASAN: probably user-memory-access in range [0x0000000100040098-0x000000010004009f] CPU: 1 PID: 5487 Comm: dhcpcd-run-hook Not tainted 6.8.0-rc6-syzkaller-g8f50d5c42355-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:list_empty include/linux/list.h:373 [inline] RIP: 0010:locks_remove_posix+0xff/0x440 fs/locks.c:2554 Code: 4d 8b be 20 02 00 00 4d 85 ff 0f 84 9f 01 00 00 e8 16 ea 7b ff 49 8d 47 50 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 <80> 3c 11 00 0f 85 09 03 00 00 49 8b 57 50 48 39 d0 0f 84 6e 01 00 RSP: 0018:ffffc9000388f978 EFLAGS: 00010202 RAX: 0000000100040098 RBX: ffff888019b36500 RCX: 0000000020008013 RDX: dffffc0000000000 RSI: ffffffff820b2e1a RDI: ffff888076090730 RBP: 1ffff92000711f30 R08: 0000000000000003 R09: 0000000000004000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000388f9b0 R13: ffff88802a7e0b40 R14: ffff888076090510 R15: 0000000100040048 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100040340 CR3: 00000000183e4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: filp_flush+0x11b/0x1a0 fs/open.c:1518 filp_close+0x1c/0x30 fs/open.c:1527 close_files fs/file.c:432 [inline] put_files_struct fs/file.c:447 [inline] put_files_struct+0x1df/0x360 fs/file.c:444 exit_files+0x82/0xb0 fs/file.c:464 do_exit+0xa56/0x2ad0 kernel/exit.c:866 do_group_exit+0xd4/0x2a0 kernel/exit.c:1020 get_signal+0x23b5/0x2790 kernel/signal.c:2893 arch_do_signal_or_restart+0x90/0x7f0 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x13c/0x280 kernel/entry/common.c:225 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570 RIP: 0033:0x7fbec7157428 Code: Unable to access opcode bytes at 0x7fbec71573fe. RSP: 002b:00007fff8928a8a0 EFLAGS: 00010246 RAX: 0000000100040048 RBX: 0000555b854932c0 RCX: 00007fbec7205098 RDX: 0000000000000000 RSI: 0000555b85495d30 RDI: 0000555b85494930 RBP: 0000555b85494930 R08: 0000000000000000 R09: 0000000000000000 R10: 00007fbec7205088 R11: 0000000000000246 R12: 0000000000000000 R13: 0000555b85495d30 R14: 0000000000000000 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:list_empty include/linux/list.h:373 [inline] RIP: 0010:locks_remove_posix+0xff/0x440 fs/locks.c:2554 Code: 4d 8b be 20 02 00 00 4d 85 ff 0f 84 9f 01 00 00 e8 16 ea 7b ff 49 8d 47 50 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 <80> 3c 11 00 0f 85 09 03 00 00 49 8b 57 50 48 39 d0 0f 84 6e 01 00 RSP: 0018:ffffc9000388f978 EFLAGS: 00010202 RAX: 0000000100040098 RBX: ffff888019b36500 RCX: 0000000020008013 RDX: dffffc0000000000 RSI: ffffffff820b2e1a RDI: ffff888076090730 RBP: 1ffff92000711f30 R08: 0000000000000003 R09: 0000000000004000 R10: 0000000000000000 R11: 0000000000000000 R12: ffffc9000388f9b0 R13: ffff88802a7e0b40 R14: ffff888076090510 R15: 0000000100040048 FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000100040340 CR3: 00000000183e4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 4d 8b be 20 02 00 00 mov 0x220(%r14),%r15 7: 4d 85 ff test %r15,%r15 a: 0f 84 9f 01 00 00 je 0x1af 10: e8 16 ea 7b ff call 0xff7bea2b 15: 49 8d 47 50 lea 0x50(%r15),%rax 19: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 20: fc ff df 23: 48 89 c1 mov %rax,%rcx 26: 48 c1 e9 03 shr $0x3,%rcx * 2a: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) <-- trapping instruction 2e: 0f 85 09 03 00 00 jne 0x33d 34: 49 8b 57 50 mov 0x50(%r15),%rdx 38: 48 39 d0 cmp %rdx,%rax 3b: 0f .byte 0xf 3c: 84 6e 01 test %ch,0x1(%rsi)