Reverted the linux-next commit 3d35dbe6224e “s390/qeth: don't check for IFF_UP when scheduling napi” fixed several crashes could happen during boot, 01: [ 79.051526] XFS (dm-2): Mounting V5 Filesystem 00: [ 79.420398] XFS (dm-2): Ending clean mount 00: [ 79.439284] xfs filesystem being mounted at /home supports timestamps unt 00: il 2038 (0x7fffffff) 00: [ 98.203218] ------------[ cut here ]------------ 00: [ 98.203640] kernel BUG at include/linux/netdevice.h:516! 00: [ 98.203725] monitor event: 0040 ilc:2 [#1] SMP DEBUG_PAGEALLOC 00: [ 98.203744] Modules linked in: ip_tables x_tables xfs dasd_fba_mod dasd_e 00: ckd_mod dm_mirror dm_region_hash dm_log dm_mod 00: [ 98.203779] CPU: 0 PID: 1127 Comm: NetworkManager Not tainted 5.6.0-rc3-n 00: ext-20200302+ #4 00: [ 98.203794] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) 00: [ 98.203808] Krnl PSW : 0704c00180000000 00000000309cccc4 (qeth_open+0x2f4 00: /0x320) 00: [ 98.203836] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 00: RI:0 EA:3 00: [ 98.203853] Krnl GPRS: 0000000000000001 0000000000000010 000000004eca57bf 00: 000000004eca57bf 00: [ 98.203870] 0000030000000000 00000000309ccb02 00000000384e5400 00: 00000000384e5408 00: [ 98.203885] 000000004eca57a8 000000004eca57b8 00000000384e5000 00: 000000004eca5000 00: [ 98.203902] 0000000030fdd900 0000000030d78d00 00000000309ccb02 00: 000003e00412ea88 00: [ 98.203940] Krnl Code: 00000000309cccb4: c0200052cce6 larl %r2, 00: 0000000031426680 00: [ 98.203940] 00000000309cccba: c0e5fff5bf4f brasl %r14 00: ,0000000030884b58 00: [ 98.203940] #00000000309cccc0: af000000 mc 0,0 00: [ 98.203940] >00000000309cccc4: c0200052ccfe larl %r2, 00: 00000000314266c0 00: [ 98.203940] 00000000309cccca: c0e5fff5bf47 brasl %r14 00: ,0000000030884b58 00: [ 98.203940] 00000000309cccd0: a728fffb lhi %r2, 00: -5 00: [ 98.203940] 00000000309cccd4: a7f4ff55 brc 15,0 00: 0000000309ccb7e 00: [ 98.203940] 00000000309cccd8: b9040039 lgr %r3, 00: %r9 00: [ 98.204221] Call Trace: 00: [ 98.204277] [<00000000309cccc4>] qeth_open+0x2f4/0x320 napi_enable at include/linux/netdevice.h:516 (inlined by) qeth_open at drivers/s390/net/qeth_core_main.c:6591 00: [ 98.204292] ([<00000000309ccaf8>] qeth_open+0x128/0x320) 00: [ 98.204308] [<0000000030a3c778>] __dev_open+0x190/0x268 00: [ 98.204324] [<0000000030a3ce80>] __dev_change_flags+0x2e8/0x378 00: [ 98.204340] [<0000000030a3cf6e>] dev_change_flags+0x5e/0xb0 00: [ 98.204357] [<0000000030a60a16>] do_setlink+0x59e/0x1728 00: [ 98.204372] [<0000000030a62750>] __rtnl_newlink+0x708/0xbd0 00: [ 98.204388] [<0000000030a62c86>] rtnl_newlink+0x6e/0x90 00: [ 98.204404] [<0000000030a59004>] rtnetlink_rcv_msg+0x29c/0x6e0 00: [ 98.204421] [<0000000030aa9cd2>] netlink_rcv_skb+0xea/0x218 00: [ 98.204436] [<0000000030aa8f5a>] netlink_unicast+0x2d2/0x3a0 00: [ 98.204451] [<0000000030aa95dc>] netlink_sendmsg+0x5b4/0x6c0 00: [ 98.204469] [<00000000309e76a6>] ____sys_sendmsg+0x32e/0x3c8 00: [ 98.204485] [<00000000309e8d08>] ___sys_sendmsg+0x108/0x148 00: [ 98.204500] [<00000000309ec2a8>] __sys_sendmsg+0xe0/0x148 00: [ 98.204515] [<00000000309ecda6>] __s390x_sys_socketcall+0x356/0x430 00: [ 98.204532] [<0000000030be3568>] system_call+0xd8/0x2b4 00: [ 98.204544] INFO: lockdep is turned off. 00: [ 98.204555] Last Breaking-Event-Address: 00: [ 98.204568] [<00000000309ccb0c>] qeth_open+0x13c/0x320 00: [ 98.204585] Kernel panic - not syncing: Fatal exception: panic_on_oops 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 01. 01: HCPGSP2629I The virtual machine is placed in CP mode due to a SIGP stop from CPU 00. 00: HCPGIR450W CP entered; disabled wait PSW 00020001 80000000 00000000 302A66EE 00: [ 28.095006] illegal operation: 0001 ilc:1 [#1] SMP DEBUG_PAGEALLOC 00: [ 28.095045] Modules linked in: dm_mirror dm_region_hash dm_log dm_mod 00: [ 28.095075] CPU: 0 PID: 432 Comm: ccw_init Not tainted 5.6.0-rc3-next-20 00: 00302+ #2 00: [ 28.095090] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) 00: [ 28.095103] Krnl PSW : 0704e00180000000 0000000000000002 (0x2) 00: [ 28.095124] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 00: RI:0 EA:3 00: [ 28.095141] Krnl GPRS: 0000000000000001 0000000000000000 00000000475597a8 00: 0000000000000000 00: [ 28.095157] 0000030000000000 0000000005e6b280 000000000639d197 00: 00000000475597a8 00: [ 28.095174] 000003e000000000 000003e00014fc78 000003e00014fbf8 00: 00000000475597a8 00: [ 28.095189] 000000000640d900 00000000061a8aa0 0000000005e6b29a 00: 000003e00014fa68 00: [ 28.095210] Krnl Code:#0000000000000000: 0000 illegal 00: [ 28.095210] >0000000000000002: 0000 illegal 00: [ 28.095210] 0000000000000004: 0000 illegal 00: [ 28.095210] 0000000000000006: 0000 illegal 00: [ 28.095210] 0000000000000008: 0000 illegal 00: [ 28.095210] 000000000000000a: 0000 illegal 00: [ 28.095210] 000000000000000c: 0000 illegal 00: [ 28.095210] 000000000000000e: 0000 illegal 00: [ 28.095279] Call Trace: 00: [ 28.095290] [<0000000000000002>] 0x2 00: [ 28.095318] ([<0000000005e6b254>] net_rx_action+0x2c4/0x9e0) arch_test_bit at arch/s390/include/asm/bitops.h:219 (inlined by) test_bit at include/asm-generic/bitops/instrumented-non-atomic.h:111 (inlined by) napi_poll at net/core/dev.c:6569 (inlined by) net_rx_action at net/core/dev.c:6638 00: [ 28.095338] [<00000000060147f2>] __do_softirq+0x1da/0xa28 00: [ 28.095362] [<00000000056d488c>] do_softirq_own_stack+0xe4/0x100 00: [ 28.095665] [<000000000571f438>] irq_exit+0x148/0x1c0 00: [ 28.095684] [<00000000056d4048>] do_IRQ+0xb8/0x108 00: [ 28.095702] [<0000000006013a3c>] io_int_handler+0x12c/0x2b8 00: [ 28.095719] [<00000000057d4f48>] lock_acquire+0x248/0x460 00: [ 28.095735] ([<00000000057d4f12>] lock_acquire+0x212/0x460) 00: [ 28.095754] [<0000000005a8c994>] lock_page_memcg+0x54/0x180 00: [ 28.095772] [<00000000059f0dd2>] page_remove_rmap+0x17a/0x8c0 00: [ 28.095787] [<00000000059cdde6>] unmap_page_range+0x956/0x1690 00: [ 28.095801] [<00000000059cebe0>] unmap_single_vma+0xc0/0x148 00: [ 28.095816] [<00000000059ceed4>] unmap_vmas+0x54/0x88 00: [ 28.095831] [<00000000059e3198>] exit_mmap+0x1b0/0x2a8 00: [ 28.095846] [<0000000005709ef6>] mmput+0xce/0x230 00: [ 28.095860] [<000000000571c750>] do_exit+0x5b0/0x1538 00: [ 28.095875] [<000000000571d7ce>] do_group_exit+0x7e/0x150 00: [ 28.095889] [<000000000571d8d2>] __s390x_sys_exit_group+0x32/0x38 00: [ 28.095905] [<00000000060136b6>] system_call+0x296/0x2b4 00: [ 28.095917] INFO: lockdep is turned off. 00: [ 28.095928] Last Breaking-Event-Address: 00: [ 28.095944] [<0000000005e6b298>] net_rx_action+0x308/0x9e0 napi_poll at net/core/dev.c:6570 (inlined by) net_rx_action at net/core/dev.c:6638 00: [ 28.095964] Kernel panic - not syncing: Fatal exception in interrupt 00: [ 28.034050] qeth 0.0.8000: MAC address 02:de:ad:be:ef:87 successfully reg 00: istered 00: [ 28.040202] illegal operation: 0001 ilc:1 [#1] SMP DEBUG_PAGEALLOC 00: [ 28.040226] Modules linked in: dm_mirror dm_region_hash dm_log dm_mod 00: [ 28.040254] CPU: 0 PID: 402 Comm: systemd-udevd Not tainted 5.6.0-rc3-nex 00: t-20200302+ #3 00: [ 28.040271] Hardware name: IBM 2964 N96 400 (z/VM 6.4.0) 00: [ 28.040286] Krnl PSW : 0704e00180000000 0000000000000002 (0x2) 00: [ 28.040307] R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 00: RI:0 EA:3 00: [ 28.040324] Krnl GPRS: 0000000000000001 0000000000000000 0000000001b517a8 00: 0000000000000000 00: [ 28.040340] 0000030000000000 00000000303eb2f0 000000003091d197 00: 0000000001b517a8 00: [ 28.040356] 000003e000000000 000003e00014fc78 000003e00014fbf8 00: 0000000001b517a8 00: [ 28.040371] 000000003098d900 0000000030728aa0 00000000303eb30 00: 000003e00014fa68 00: [ 28.040393] Krnl Code:#0000000000000000: 0000 illegal 00: [ 28.040393] >0000000000000002: 0000 illegal 00: [ 28.040393] 0000000000000004: 0000 illegal 00: [ 28.040393] 0000000000000006: 0000 illegal 00: [ 28.040393] 0000000000000008: 0000 illegal 00: [ 28.040393] 000000000000000a: 0000 illegal 00: [ 28.040393] 000000000000000c: 0000 illegal 00: [ 28.040393] 000000000000000e: 0000 illegal 00: [ 28.040462] Call Trace: 00: [ 28.040792] [<0000000000000002>] 0x2 00: [ 28.040907] ([<00000000303eb2c4>] net_rx_action+0x2c4/0x9e0) 00: [ 28.040927] [<0000000030594862>] __do_softirq+0x1da/0xa28 00: [ 28.040949] [<000000002fc5488c>] do_softirq_own_stack+0xe4/0x100 00: [ 28.040966] [<000000002fc9f438>] irq_exit+0x148/0x1c0 00: [ 28.040981] [<000000002fc54048>] do_IRQ+0xb8/0x108 00: [ 28.040995] [<0000000030593aac>] io_int_handler+0x12c/0x2b8 00: [ 28.041014] [<000000002ffe55b0>] __asan_store8+0x10/0x98 00: [ 28.041032] ([<000000002fc5fa90>] unwind_next_frame+0x168/0x3e0) 00: [ 28.041048] [<000000002fc669b2>] arch_stack_walk+0x10a/0x178 00: [ 28.041065] [<000000002fda0232>] stack_trace_save+0xba/0xd0 00: [ 28.041083] [<0000000030025d7e>] create_object+0x1d6/0x5c8 00: [ 28.041113] [<000000002ffdb6f2>] kmem_cache_alloc+0x1f2/0x548 00: [ 28.041141] [<000000002ff72ece>] anon_vma_clone+0x96/0x248 00: [ 28.041157] [<000000002ff730de>] anon_vma_fork+0x5e/0x1f0 00: [ 28.041175] [<000000002fc8b9a6>] dup_mm+0x88e/0xa80 00: [ 28.041190] [<000000002fc8dc26>] copy_process+0x183e/0x2d20 00: [ 28.041205] [<000000002fc8f504>] _do_fork+0x134/0xab0 00: [ 28.041220] [<000000002fc9009e>] __do_sys_clone+0xce/0x110 00: [ 28.041235] [<000000002fc9038a>] __s390x_sys_clone+0x22/0x30 00: [ 28.041251] [<0000000030593726>] system_call+0x296/0x2b4 00: [ 28.041263] INFO: lockdep is turned off. 00: [ 28.041274] Last Breaking-Event-Address: 00: [ 28.041289] [<00000000303eb308>] net_rx_action+0x308/0x9e0 00: [ 28.041308] Kernel panic - not syncing: Fatal exception in interrupt
