ci2 starts bisection 2023-06-23 04:55:54.54330263 +0000 UTC m=+202338.772260861 bisecting fixing commit since 9d6bde853685609a631871d7c12be94fdf8d912e building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec ensuring issue is reproducible on original commit 9d6bde853685609a631871d7c12be94fdf8d912e testing commit 9d6bde853685609a631871d7c12be94fdf8d912e gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e5103f778a1232cba0f5b4fe5daf82f641016dae735b65b1ced95c5ca93c1a77 all runs: crashed: WARNING in print_bfs_bug testing current HEAD f67653019430833d5003f16817d7fa85272a6a76 testing commit f67653019430833d5003f16817d7fa85272a6a76 gcc compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 0e4c5d10b856bd6552630d3dd6b81eb5a8ba8c62a7dd33d7c1f481ade38900f6 all runs: crashed: WARNING in print_bfs_bug crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 42m11.628062137s (build: 30m21.424941295s, test: 10m46.740554353s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Linux 5.15.118 crash: WARNING in print_bfs_bug netlink: 4 bytes leftover after parsing attributes in process `syz-executor.0'. ------------[ cut here ]------------ lockdep bfs error:-1 WARNING: CPU: 1 PID: 11786 at kernel/locking/lockdep.c:2022 print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022 Modules linked in: CPU: 1 PID: 11786 Comm: syz-executor.0 Not tainted 5.15.118-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 RIP: 0010:print_bfs_bug+0x22/0x30 kernel/locking/lockdep.c:2022 Code: 0f 1f 84 00 00 00 00 00 55 89 fd 53 e8 47 cb 35 02 89 c3 e8 60 fd ff ff 85 db 74 10 89 ee 48 c7 c7 00 71 0b 89 e8 a7 ee 20 07 <0f> 0b 5b 5d c3 66 0f 1f 84 00 00 00 00 00 41 57 be fd ff 0f 00 41 RSP: 0018:ffffc90005db6990 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000003 RSI: 0000000000000004 RDI: fffff52000bb6d24 RBP: 00000000ffffffff R08: 0000000000000001 R09: ffff8880b9d27a5b R10: ffffed10173a4f4b R11: 207065646b636f6c R12: ffff888021cfc708 R13: ffff888021cfbb00 R14: ffffc90005db6aa0 R15: 0000000000000000 FS: 00007ff1b773b700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff1b7739ff8 CR3: 0000000044178000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: check_irq_usage+0x69e/0xac0 kernel/locking/lockdep.c:2747 check_prev_add kernel/locking/lockdep.c:3057 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3787 [inline] __lock_acquire+0x2a50/0x55d0 kernel/locking/lockdep.c:5011 lock_acquire kernel/locking/lockdep.c:5622 [inline] lock_acquire+0x1ab/0x4e0 kernel/locking/lockdep.c:5587 do_write_seqcount_begin_nested include/linux/seqlock.h:520 [inline] do_write_seqcount_begin include/linux/seqlock.h:545 [inline] psi_group_change+0x137/0xc70 kernel/sched/psi.c:710 psi_task_switch+0x16d/0x4d0 kernel/sched/psi.c:882 psi_sched_switch kernel/sched/stats.h:162 [inline] __schedule+0x1a37/0x54c0 kernel/sched/core.c:6367 preempt_schedule_irq+0x4e/0x90 kernel/sched/core.c:6776 irqentry_exit+0x31/0x80 kernel/entry/common.c:426 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:lock_acquire+0x1ef/0x4e0 kernel/locking/lockdep.c:5590 Code: fa ad 7e 83 f8 01 0f 85 79 02 00 00 9c 58 f6 c4 02 0f 85 8c 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00 00 00 00 fc ff df <48> 01 c3 48 c7 03 00 00 00 00 48 c7 43 08 00 00 00 00 48 8b 84 24 RSP: 0018:ffffc90005db71a8 EFLAGS: 00000206 RAX: dffffc0000000000 RBX: 1ffff92000bb6e37 RCX: 0000000000000001 RDX: 1ffff1100439f8bd RSI: ffffffff890b6ea0 RDI: ffffffff895ebac0 RBP: 0000000000000001 R08: 0000000000000000 R09: ffffffff8fc03b37 R10: fffffbfff1f80766 R11: 0000000000000fc2 R12: 0000000000000000 R13: 0000000000000000 R14: ffffffff8b2b5b40 R15: 0000000000000000 fs_reclaim_acquire mm/page_alloc.c:4564 [inline] fs_reclaim_acquire+0xd2/0x160 mm/page_alloc.c:4555 might_alloc include/linux/sched/mm.h:206 [inline] slab_pre_alloc_hook mm/slab.h:492 [inline] slab_alloc_node mm/slub.c:3134 [inline] kmem_cache_alloc_node+0x3b/0x340 mm/slub.c:3256 __alloc_skb+0x153/0x280 net/core/skbuff.c:415 alloc_skb include/linux/skbuff.h:1167 [inline] nlmsg_new include/net/netlink.h:953 [inline] genlmsg_new include/net/genetlink.h:409 [inline] __send_and_alloc_skb drivers/net/team/team.c:2426 [inline] team_nl_send_options_get+0xef/0xc40 drivers/net/team/team.c:2449 team_nl_send_event_options_get drivers/net/team/team.c:2865 [inline] team_nl_cmd_options_set+0x377/0xa60 drivers/net/team/team.c:2669 genl_family_rcv_msg_doit+0x1e4/0x2f0 net/netlink/genetlink.c:731 genl_family_rcv_msg net/netlink/genetlink.c:775 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:792 netlink_rcv_skb+0x118/0x340 net/netlink/af_netlink.c:2504 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:803 netlink_unicast_kernel net/netlink/af_netlink.c:1330 [inline] netlink_unicast+0x430/0x700 net/netlink/af_netlink.c:1356 netlink_sendmsg+0x779/0xc20 net/netlink/af_netlink.c:1923 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:724 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2412 ___sys_sendmsg+0xd3/0x150 net/socket.c:2466 __sys_sendmsg+0xb2/0x140 net/socket.c:2495 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7ff1b83c9169 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ff1b773b168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007ff1b84e8f80 RCX: 00007ff1b83c9169 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000005 RBP: 00007ff1b8424ca1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff6dcbb93f R14: 00007ff1b773b300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: fa cli 1: ad lods %ds:(%rsi),%eax 2: 7e 83 jle 0xffffff87 4: f8 clc 5: 01 0f add %ecx,(%rdi) 7: 85 79 02 test %edi,0x2(%rcx) a: 00 00 add %al,(%rax) c: 9c pushfq d: 58 pop %rax e: f6 c4 02 test $0x2,%ah 11: 0f 85 8c 02 00 00 jne 0x2a3 17: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp) 1d: 74 01 je 0x20 1f: fb sti 20: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 27: fc ff df * 2a: 48 01 c3 add %rax,%rbx <-- trapping instruction 2d: 48 c7 03 00 00 00 00 movq $0x0,(%rbx) 34: 48 c7 43 08 00 00 00 movq $0x0,0x8(%rbx) 3b: 00 3c: 48 rex.W 3d: 8b .byte 0x8b 3e: 84 .byte 0x84 3f: 24 .byte 0x24