When rmmod null_blk lead to GPF below: [ 29.193712] IPv6: ADDRCONF(NETDEV_CHANGE): ib0: link becomes ready [ 62.216289] general protection fault: 0000 [#1] SMP DEBUG_PAGEALLOC [ 62.216586] Dumping ftrace buffer: [ 62.216660] (ftrace buffer empty) [ 62.216730] Modules linked in: ib_ipoib ib_uverbs ib_umad mlx4_ib mlx4_en rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr null_blk(-) mlx4_core [ 62.217755] CPU: 1 PID: 3928 Comm: rmmod Not tainted 3.19.0-rc6debug #1 [ 62.217824] Hardware name: To be filled by O.E.M. To be filled by O.E.M./M5A97 R2.0, BIOS 2501 04/07/2014 [ 62.217900] task: ffff880233450000 ti: ffff8802289a8000 task.ti: ffff8802289a8000 [ 62.217966] RIP: 0010:[<ffffffff8138c293>] [<ffffffff8138c293>] blk_mq_tag_wakeup_all+0x13/0x90 [ 62.218095] RSP: 0018:ffff8802289abe68 EFLAGS: 00010202 [ 62.218170] RAX: ffff8800b534d480 RBX: 0000000000000000 RCX: 0000000000000001 [ 62.218247] RDX: 000000006b6b6b6b RSI: 0000000000000001 RDI: 6b6b6b6b6b6b6b6b [ 62.218316] RBP: ffff8802289abe88 R08: 0000000000000038 R09: 0000000000000000 [ 62.218969] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001 [ 62.219038] R13: ffff880232b20a20 R14: 00007f7cad118090 R15: 0000000000000800 [ 62.219107] FS: 00007f7cac1ac700(0000) GS:ffff880235200000(0000) knlGS:0000000000000000 [ 62.219175] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 62.219288] CR2: 00007f11a69e4095 CR3: 0000000230d54000 CR4: 00000000000407e0 [ 62.219401] Stack: [ 62.219514] 0000000000000000 ffff880232b20000 ffff880232b20a20 00007f7cad118090 [ 62.219912] ffff8802289abea8 ffffffff8138985e ffff880232b20000 ffff880232b20000 [ 62.220333] ffff8802289abec8 ffffffff8137cfd6 ffff880232b20000 ffff880232b20730 [ 62.220724] Call Trace: [ 62.220834] [<ffffffff8138985e>] blk_mq_wake_waiters+0x4e/0x80 [ 62.220952] [<ffffffff8137cfd6>] blk_set_queue_dying+0x26/0x90 [ 62.221068] [<ffffffff8137d075>] blk_cleanup_queue+0x35/0x2a0 [ 62.221187] [<ffffffffa004b7f4>] null_exit+0x57/0x8c [null_blk] [ 62.221308] [<ffffffff81112a98>] SyS_delete_module+0x1b8/0x220 [ 62.221456] [<ffffffff817db3d2>] system_call_fastpath+0x12/0x17 [ 62.221580] Code: 40 08 b8 01 00 00 00 5d c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 00 00 66 66 66 66 90 55 48 89 e5 41 56 41 55 41 54 53 41 89 f4 <44> 8b 6f 28 48 89 fb 41 be 08 00 00 00 49 63 c5 48 c1 e0 07 48 [ 62.227747] RIP [<ffffffff8138c293>] blk_mq_tag_wakeup_all+0x13/0x90 [ 62.227917] RSP <ffff8802289abe68> [ 62.228138] ---[ end trace 349782d190908f70 ]---
-- Best Regards, Jack Wang -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
