Hello, syzbot found the following issue on:
HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1596a979580000 kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 dashboard link: https://syzkaller.appspot.com/bug?extid=1df7473ef265fe8ba6e1 compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1431e625580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-818bebeb.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6e4100526b12/vmlinux-818bebeb.xz kernel image: https://storage.googleapis.com/syzbot-assets/723c4783ee96/bzImage-818bebeb.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: [email protected] bridge0: port 2(bridge_slave_1) entered disabled state bridge_slave_0: left allmulticast mode bridge_slave_0: left promiscuous mode bridge0: port 1(bridge_slave_0) entered disabled state Oops: general protection fault, probably for non-canonical address 0xfbd59c0000000024: 0000 [#1] SMP KASAN NOPTI KASAN: maybe wild-memory-access in range [0xdead000000000120-0xdead000000000127] CPU: 1 UID: 0 PID: 12 Comm: kworker/u32:0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: netns cleanup_net RIP: 0010:__hlist_del include/linux/list.h:1038 [inline] RIP: 0010:hlist_del_rcu include/linux/rculist.h:599 [inline] RIP: 0010:br_del_frame+0x106/0x1a0 net/bridge/br_input.c:482 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 18 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 76 49 89 1c 24 48 85 db 74 24 e8 c6 45 72 f7 48 8d RSP: 0018:ffffc900000f78e8 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1bd5a00000000024 RSI: ffffffff8a98bb9f RDI: ffffffff91453338 RBP: ffffffff91453320 R08: 0000000000000001 R09: 000000000000002c R10: 0000000000000200 R11: 0000000000000001 R12: dead000000000122 R13: ffff88802e200800 R14: 000000000000001c R15: ffff88802e200800 FS: 0000000000000000(0000) GS:ffff8880d5ca2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdcf9541e9c CR3: 0000000026926000 CR4: 0000000000352ef0 Call Trace: <TASK> mep_delete_implementation+0x292/0x340 net/bridge/br_cfm.c:591 br_cfm_port_del+0x14f/0x1e0 net/bridge/br_cfm.c:872 del_nbp+0x168/0xd50 net/bridge/br_if.c:348 br_dev_delete+0x96/0x1c0 net/bridge/br_if.c:387 br_net_exit_rtnl+0xdb/0x140 net/bridge/br.c:414 ops_exit_rtnl_list net/core/net_namespace.c:181 [inline] ops_undo_list+0x896/0xab0 net/core/net_namespace.c:249 cleanup_net+0x499/0x920 net/core/net_namespace.c:706 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3387 process_scheduled_works kernel/workqueue.c:3470 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3551 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__hlist_del include/linux/list.h:1038 [inline] RIP: 0010:hlist_del_rcu include/linux/rculist.h:599 [inline] RIP: 0010:br_del_frame+0x106/0x1a0 net/bridge/br_input.c:482 Code: 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 87 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 18 4c 89 e2 48 c1 ea 03 <80> 3c 02 00 75 76 49 89 1c 24 48 85 db 74 24 e8 c6 45 72 f7 48 8d RSP: 0018:ffffc900000f78e8 EFLAGS: 00010a06 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 1bd5a00000000024 RSI: ffffffff8a98bb9f RDI: ffffffff91453338 RBP: ffffffff91453320 R08: 0000000000000001 R09: 000000000000002c R10: 0000000000000200 R11: 0000000000000001 R12: dead000000000122 R13: ffff88802e200800 R14: 000000000000001c R15: ffff88802e200800 FS: 0000000000000000(0000) GS:ffff8880d5ca2000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdcf9541e9c CR3: 0000000026926000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 00 fc add %bh,%ah 2: ff lcall (bad) 3: df 48 89 fisttps -0x77(%rax) 6: fa cli 7: 48 c1 ea 03 shr $0x3,%rdx b: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) f: 0f 85 87 00 00 00 jne 0x9c 15: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 1c: fc ff df 1f: 4c 8b 65 18 mov 0x18(%rbp),%r12 23: 4c 89 e2 mov %r12,%rdx 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 76 jne 0xa6 30: 49 89 1c 24 mov %rbx,(%r12) 34: 48 85 db test %rbx,%rbx 37: 74 24 je 0x5d 39: e8 c6 45 72 f7 call 0xf7724604 3e: 48 rex.W 3f: 8d .byte 0x8d --- 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 [email protected]. 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 syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. 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
