[syzbot] [net?] BUG: corrupted list in nsim_bpf_destroy_prog
From: syzbot <hidden>
Date: 2024-11-14 17:04:26
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Hello, syzbot found the following issue on: HEAD commit: 252e01e68241 selftests: net: add netlink-dumps to .gitignore git tree: net console output: https://syzkaller.appspot.com/x/log.txt?x=157ce35f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=64aa0d9945bd5c1 dashboard link: https://syzkaller.appspot.com/bug?extid=f57a59b585e797d8c9b8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/2459f940e3b8/disk-252e01e6.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6b3823596aaa/vmlinux-252e01e6.xz kernel image: https://storage.googleapis.com/syzbot-assets/bf011fb97648/bzImage-252e01e6.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+f57a59b585e797d8c9b8@syzkaller.appspotmail.com list_del corruption. prev->next should be ffff8880334808a8, but was ffff88805f2f43c0. (prev=ffff88805f2f43c0) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:64! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 8 Comm: kworker/0:0 Not tainted 6.12.0-rc6-syzkaller-00169-g252e01e68241 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Workqueue: events bpf_prog_free_deferred RIP: 0010:__list_del_entry_valid_or_report+0x11b/0x140 lib/list_debug.c:62 Code: 00 07 90 0f 0b 48 c7 c7 a0 0d 61 8c 4c 89 fe e8 0b 8f 00 07 90 0f 0b 48 c7 c7 00 0e 61 8c 4c 89 fe 48 89 d9 e8 f6 8e 00 07 90 <0f> 0b 48 c7 c7 80 0e 61 8c 4c 89 fe 4c 89 f1 e8 e1 8e 00 07 90 0f RSP: 0018:ffffc900000d7a00 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff88805f2f43c0 RCX: 67b0c67390e66700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900000d7b38 R08: ffffffff8174a18c R09: fffffbfff1cf9fd0 R10: dffffc0000000000 R11: fffffbfff1cf9fd0 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff88805f2f43c0 R15: ffff8880334808a8 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c38e396 CR3: 000000006435a000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __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] nsim_bpf_destroy_prog+0xd9/0x1f0 drivers/net/netdevsim/bpf.c:281 __bpf_prog_offload_destroy kernel/bpf/offload.c:113 [inline] bpf_prog_dev_bound_destroy+0x2aa/0x590 kernel/bpf/offload.c:392 bpf_prog_free_deferred+0x3c5/0x710 kernel/bpf/core.c:2796 process_one_work kernel/workqueue.c:3229 [inline] process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310 worker_thread+0x870/0xd30 kernel/workqueue.c:3391 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x11b/0x140 lib/list_debug.c:62 Code: 00 07 90 0f 0b 48 c7 c7 a0 0d 61 8c 4c 89 fe e8 0b 8f 00 07 90 0f 0b 48 c7 c7 00 0e 61 8c 4c 89 fe 48 89 d9 e8 f6 8e 00 07 90 <0f> 0b 48 c7 c7 80 0e 61 8c 4c 89 fe 4c 89 f1 e8 e1 8e 00 07 90 0f RSP: 0018:ffffc900000d7a00 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffff88805f2f43c0 RCX: 67b0c67390e66700 RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000 RBP: ffffc900000d7b38 R08: ffffffff8174a18c R09: fffffbfff1cf9fd0 R10: dffffc0000000000 R11: fffffbfff1cf9fd0 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffff88805f2f43c0 R15: ffff8880334808a8 FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8c75d062d8 CR3: 0000000064358000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup