slab kmalloc-8k start ffff888146f54000 pointer offset 1480 size 8192 list_del corruption. prev->next should be ffffc90002f07b98, but was ffff888146f545c8. (prev=ffff888146f545c8) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:62! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 6507 Comm: syz.0.16 Not tainted 6.15.0-rc5-syzkaller-gcd802e7e5f1e #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 RIP: 0010:__list_del_entry_valid_or_report+0x17a/0x200 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 72 f4 8b e8 17 09 c7 fc 90 <0f> 0b 4c 89 e7 e8 3c b8 29 fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90002f07880 EFLAGS: 00010086 RAX: 000000000000006d RBX: ffffc90002f07b98 RCX: ffffffff819a19b9 RDX: 0000000000000000 RSI: ffffffff819a9846 RDI: 0000000000000005 RBP: ffff888146f545c8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000001 R12: ffff888146f545c8 R13: ffffc90002f07b98 R14: ffffc90002f07ba0 R15: ffffc90002f07b70 FS: 00007fd7dcff76c0(0000) GS:ffff8881249ec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f516e248ff8 CR3: 00000000349c2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry_valid include/linux/list.h:124 [inline] __list_del_entry include/linux/list.h:215 [inline] list_del include/linux/list.h:229 [inline] __remove_wait_queue include/linux/wait.h:207 [inline] remove_wait_queue+0x30/0x180 kernel/sched/wait.c:55 free_poll_entry fs/select.c:132 [inline] poll_freewait+0xd5/0x250 fs/select.c:141 do_sys_poll+0x6f6/0xe00 fs/select.c:1010 __do_sys_poll fs/select.c:1074 [inline] __se_sys_poll fs/select.c:1062 [inline] __x64_sys_poll+0x1a6/0x450 fs/select.c:1062 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fd7dc185d29 Code: ff ff 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 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd7dcff7038 EFLAGS: 00000246 ORIG_RAX: 0000000000000007 RAX: ffffffffffffffda RBX: 00007fd7dc375fa0 RCX: 00007fd7dc185d29 RDX: 0000000000000106 RSI: 0000000000000005 RDI: 0000000020000080 RBP: 00007fd7dc201b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd7dc375fa0 R15: 00007fffe2340508 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x17a/0x200 lib/list_debug.c:62 Code: 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 8d 00 00 00 48 8b 55 00 48 89 e9 48 89 de 48 c7 c7 40 72 f4 8b e8 17 09 c7 fc 90 <0f> 0b 4c 89 e7 e8 3c b8 29 fd 48 89 ea 48 b8 00 00 00 00 00 fc ff RSP: 0018:ffffc90002f07880 EFLAGS: 00010086 RAX: 000000000000006d RBX: ffffc90002f07b98 RCX: ffffffff819a19b9 RDX: 0000000000000000 RSI: ffffffff819a9846 RDI: 0000000000000005 RBP: ffff888146f545c8 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000080000001 R11: 0000000000000001 R12: ffff888146f545c8 R13: ffffc90002f07b98 R14: ffffc90002f07ba0 R15: ffffc90002f07b70 FS: 00007fd7dcff76c0(0000) GS:ffff8881249ec000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f516e248ff8 CR3: 00000000349c2000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400