Hi Sumit,
It is megaraid_sas driver bug. Driver does not freeup resources properly, when
scsi_add_host() fails. Please try attached patch.
Yeah, that looks to work. The driver gracefully failed to bind.
However we might have lots of memory leaks:
root@(none)$ echo scan > /sys/kernel/debug/kmemleak
root@(none)$ [ 140.585484] kmemleak: 259 new suspected memory leaks
(see /sys/kernel/debug/kmemleak)
[ 140.585484] kmemleak: 259 new suspected memory leaks (see
/sys/kernel/debug/kmemleak)
root@(none)$
root@(none)$ more /sys/kernel/debug/kmemleak
unreferenced object 0xffff0026b9184c00 (size 512):
comm "kworker/0:0", pid 5, jiffies 4294903201 (age 95.768s)
hex dump (first 32 bytes):
60 00 00 00 61 00 00 00 62 00 00 00 63 00 00 00 `...a...b...c...
64 00 00 00 65 00 00 00 66 00 00 00 67 00 00 00 d...e...f...g...
backtrace:
[<(____ptrval____)>] slab_post_alloc_hook+0x6c/0xa0
[<(____ptrval____)>] __kmalloc+0x174/0x280
[<(____ptrval____)>] megasas_probe_one+0x798/0x2878
[<(____ptrval____)>] local_pci_probe+0x74/0xf0
[<(____ptrval____)>] work_for_cpu_fn+0x2c/0x48
[<(____ptrval____)>] process_one_work+0x488/0xc08
[<(____ptrval____)>] worker_thread+0x330/0x5d0
[<(____ptrval____)>] kthread+0x1c8/0x1d0
[<(____ptrval____)>] ret_from_fork+0x10/0x18
unreferenced object 0xffff0026b922c000 (size 4096):
comm "kworker/0:0", pid 5, jiffies 4294903201 (age 95.768s)
hex dump (first 32 bytes):
00 00 21 b7 26 00 ff ff 00 00 9f ff 00 00 00 00 ..!.&...........
00 10 22 10 00 a0 ff ff 00 00 00 00 00 00 00 00 ..".............
backtrace:
[<(____ptrval____)>] slab_post_alloc_hook+0x6c/0xa0
[<(____ptrval____)>] kmem_cache_alloc_trace+0x140/0x228
[<(____ptrval____)>] megasas_alloc_fusion_context+0x30/0x1b0
[<(____ptrval____)>] megasas_probe_one+0x7d8/0x2878
[<(____ptrval____)>] local_pci_probe+0x74/0xf0
[<(____ptrval____)>] work_for_cpu_fn+0x2c/0x48
[<(____ptrval____)>] process_one_work+0x488/0xc08
[<(____ptrval____)>] worker_thread+0x330/0x5d0
[<(____ptrval____)>] kthread+0x1c8/0x1d0
[<(____ptrval____)>] ret_from_fork+0x10/0x18
unreferenced object 0xffff0026b7013000 (size 2048):
comm "kworker/0:0", pid 5, jiffies 4294903512 (age 94.540s)
hex dump (first 32 bytes):
00 58 18 b9 26 00 ff ff 00 5c 18 b9 26 00 ff ff .X..&....\..&...
00 60 18 b9 26 00 ff ff 00 64 18 b9 26 00 ff ff .`..&....d..&...
backtrace:
[<(____ptrval____)>] slab_post_alloc_hook+0x6c/0xa0
[<(____ptrval____)>] kmem_cache_alloc_trace+0x140/0x228
root@(none)$
Thanks,
John
Thanks,
Sumit
[ 62.516871] megasas: 07.713.01.00-rc1
[ 62.526189] megaraid_sas 0000:08:00.0: Adding to iommu group 1
[ 62.571790] megaraid_sas 0000:08:00.0: BAR:0x0 BAR's
base_addr(phys):0x0000080010000000 mapped virt_addr:0x(____ptrval____)
[ 62.571802] megaraid_sas 0000:08:00.0: FW now in Ready state
[ 62.583811] megaraid_sas 0000:08:00.0: 63 bit DMA mask and 63 bit
consistent mask
[ 62.602143] megaraid_sas 0000:08:00.0: firmware supports msix : (128)
[ 62.780250] megaraid_sas 0000:08:00.0: requested/available msix 128/128
[ 62.794292] megaraid_sas 0000:08:00.0: current msix/online cpus :
(128/128)
[ 62.809011] megaraid_sas 0000:08:00.0: RDPQ mode : (enabled)
[ 62.820968] megaraid_sas 0000:08:00.0: Current firmware supports
maximum commands: 4077 LDIO threshold: 0
[ 62.937043] megaraid_sas 0000:08:00.0: Configured max firmware
commands: 4076
[ 63.509185] megaraid_sas 0000:08:00.0: Performance mode :Latency
[ 63.521906] megaraid_sas 0000:08:00.0: FW supports sync cache : Yes
[ 63.535148] megaraid_sas 0000:08:00.0: megasas_disable_intr_fusion is
called outbound_intr_mask:0x40000009
[ 63.610607] megaraid_sas 0000:08:00.0: FW provided supportMaxExtLDs:
1 max_lds: 64
[ 63.626618] megaraid_sas 0000:08:00.0: controller type : MR(2048MB)
[ 63.639870] megaraid_sas 0000:08:00.0: Online Controller Reset(OCR) :
Enabled
[ 63.654945] megaraid_sas 0000:08:00.0: Secure JBOD support : Yes
[ 63.667661] megaraid_sas 0000:08:00.0: NVMe passthru support : Yes
[ 63.667672] megaraid_sas 0000:08:00.0: FW provided TM TaskAbort/Reset
timeout : 6 secs/60 secs
[ 63.698922] megaraid_sas 0000:08:00.0: JBOD sequence map support : Yes
[ 63.712715] megaraid_sas 0000:08:00.0: PCI Lane Margining support : No
[ 63.754764] megaraid_sas 0000:08:00.0: NVME page size : (4096)
[ 63.787258] megaraid_sas 0000:08:00.0: megasas_enable_intr_fusion is
called outbound_intr_mask:0x40000000
[ 63.807485] megaraid_sas 0000:08:00.0: INIT adapter done
[ 63.822235] megaraid_sas 0000:08:00.0: pci id :
(0x1000)/(0x0016)/(0x19e5)/(0xd215)
[ 63.838652] megaraid_sas 0000:08:00.0: unevenspan support : no
[ 63.850980] megaraid_sas 0000:08:00.0: firmware crash dump : no
[ 63.863499] megaraid_sas 0000:08:00.0: JBOD sequence map : enabled
[ 63.877352] scsi host0: Avago SAS based MegaRAID driver
[ 63.890398] megaraid_sas 0000:08:00.0: Failed to add host from
megasas_io_attach 6802
[ 63.906999] megaraid_sas 0000:08:00.0: megasas_disable_intr_fusion is
called outbound_intr_mask:0x40000009
[ 64.591755] nvme 0000:81:00.0: Adding to iommu group 2
[ 64.636476] nvme nvme0: pci function 0000:81:00.0
[ 64.669635] libphy: Fixed MDIO Bus: probed
[ 64.680255] tun: Universal TUN/TAP device driver, 1.6
[ 64.694422] thunder_xcv, ver 1.0
[ 64.702042] thunder_bgx, ver 1.0
[ 64.709277] nicpf, ver 1.0
[ 64.718144] e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
[ 64.730402] e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
[ 64.743337] igb: Intel(R) Gigabit Ethernet Network Driver - version
5.6.0-k
[ 64.754981] nvme nvme0: Removing after probe failure status: -12
[ 64.757953] igb: Copyright (c) 2007-2014 Intel Corporation.
[ 64.782805] igbvf: Intel(R) Gigabit Virtual Function Network Driver -
version 2.4.0-k
[ 64.799423] igbvf: Copyright (c) 2009 - 2012 Intel Corporation.
[ 64.813848] sky2: driver version 1.30
[ 64.825564] VFIO - User Level meta-driver version: 0.3
[ 64.848089] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[ 64.862029] ehci-pci: EHCI PCI platform driver
[ 64.873445] ehci-pci 0000:7a:01.0: Adding to iommu group 3
[ 64.886700]
==================================================================
[ 64.901999] BUG: KASAN: slab-out-of-bounds in
run_timer_softirq+0x6f4/0xae0
[ 64.916663] Write of size 8 at addr ffff0026b931aae0 by task swapper/0/0
[ 64.933914] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
5.6.0-rc3-00005-g17ceebe3a05c-dirty #1775
[ 64.952240] Hardware name: Huawei TaiShan 200 (Model 2280)/BC82AMDD,
BIOS 2280-V2 CS V3.B160.01 02/24/2020
[ 64.972575] Call trace:
[ 64.977729] dump_backtrace+0x0/0x298
[ 64.985439] show_stack+0x14/0x20
[ 64.992418] dump_stack+0x118/0x190
[ 64.999762] print_address_description.isra.9+0x6c/0x3b8
[ 65.010953] __kasan_report+0x134/0x23c
[ 65.019029] kasan_report+0xc/0x18
[ 65.026188] __asan_store8+0x94/0xb8
[ 65.033720] run_timer_softirq+0x6f4/0xae0
[ 65.042343] efi_header_end+0x16c/0x840
[ 65.050420] irq_exit+0x19c/0x1a8
[ 65.057396] __handle_domain_irq+0x7c/0xe0
[ 65.066022] gic_handle_irq+0x64/0x168
[ 65.073917] el1_irq+0xbc/0x180
[ 65.080528] arch_cpu_idle+0x3c/0x320
[ 65.088239] default_idle_call+0x28/0x4c
[ 65.096502] do_idle+0x278/0x348
[ 65.103295] cpu_startup_entry+0x24/0x40
[ 65.111554] rest_init+0x1c4/0x298
[ 65.118718] arch_call_rest_init+0xc/0x14
[ 65.127159] start_kernel+0x848/0x888
[ 65.138006] Allocated by task 0:
[ 65.144802] (stack is not available)
[ 65.155465] Freed by task 0:
[ 65.161530] (stack is not available)
[ 65.172193] The buggy address belongs to the object at ffff0026b931aa00
which belongs to the cache pool_workqueue of size 256
[ 65.199113] The buggy address is located 224 bytes inside of
256-byte region [ffff0026b931aa00, ffff0026b931ab00)
[ 65.223840] The buggy address belongs to the page:
[ 65.233931] page:fffffe009ac4c600 refcount:1 mapcount:0
mapping:ffff0026dd81c880 index:0xffff0026b931fe00 compound_mapcount: 0
[ 65.257923] flags: 0x6ffff00000010200(slab|head)
[ 65.267649] raw: 6ffff00000010200 fffffe009b20b208 fffffe009ac07608
ffff0026dd81c880
[ 65.283959] raw: ffff0026b931fe00 0000000000400002 00000001ffffffff
0000000000000000
[ 65.300270] page dumped because: kasan: bad access detected
[ 65.315139] Memory state around the buggy address:
[ 65.325231] ffff0026b931a980: fc fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc
[ 65.340445] ffff0026b931aa00: fc fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc
[ 65.355660] >ffff0026b931aa80: fc fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc
[ 65.370870] ^
[ 65.384256] ffff0026b931ab00: fc fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc
[ 65.399467] ffff0026b931ab80: fc fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc
[ 65.414675]
==================================================================
[ 65.429885] Disabling lock debugging due to kernel taint
[ 65.441431] Unable to handle kernel paging request at virtual address
ffffa0001013c0b0
[ 65.441695] ehci-pci 0000:7a:01.0: EHCI Host Controller
[ 65.458088] Mem abort info:
[ 65.469183] ehci-pci 0000:7a:01.0: new USB bus registered, assigned
bus number 1
[ 65.474927] ESR = 0x96000007
[ 65.491201] ehci-pci 0000:7a:01.0: irq 65, io mem 0x20c101000
[ 65.496913] EC = 0x25: DABT (current EL), IL = 32 bits
[ 65.496918] SET = 0, FnV = 0
[ 65.496922] EA = 0, S1PTW = 0
[ 65.522586] ehci-pci 0000:7a:01.0: USB 0.0 started, EHCI 1.00
[ 65.526575] Data abort info:
[ 65.526580] ISV = 0, ISS = 0x00000007
[ 65.535948] hub 1-0:1.0: USB hub found
[ 65.545245] CM = 0, WnR = 0
[ 65.545251] swapper pgtable: 4k pages, 48-bit VAs, pgdp=0000000052530000
[ 65.545256] [ffffa0001013c0b0] pgd=00002027fffff003,
pud=00002027ffffe003, pmd=00000026dda5b003, pte=0000000000000000
[ 65.551519] hub 1-0:1.0: 2 ports detected
[ 65.559375] Internal error: Oops: 96000007 [#1] PREEMPT SMP
[ 65.559379] Modules linked in:
[ 65.569534] ehci-platform: EHCI generic platform driver
[ 65.573475] CPU: 34 PID: 8 Comm: kworker/u256:0 Tainted: G B
5.6.0-rc3-00005-g17ceebe3a05c-dirty #1775
[ 65.573477] Hardware name: Huawei TaiShan 200 (Model 2280)/BC82AMDD,
BIOS 2280-V2 CS V3.B160.01 02/24/2020
[ 65.573487] Workqueue: poll_megasas0_status megasas_fault_detect_work
[ 65.573492] pstate: 80c00009 (Nzcv daif +PAN +UAO)
[ 65.588048] ehci-orion: EHCI orion driver
[ 65.609756] pc : megasas_readl+0x60/0x80
[ 65.609759] lr : megasas_readl+0x1c/0x80
[ 65.609761] sp : ffff0026d97bfc00
[ 65.609763] x29: ffff0026d97bfc00 x28: ffff0026d97a9890
[ 65.609767] x27: ffff0026d97a0618 x26: ffff0026d97a9880
[ 65.609771] x25: ffff0026d9758808 x24: ffff0026b931aa28
[ 65.609775] x23: ffff0026b931aa98 x22: ffffa0002931e000
[ 65.609779] x21: ffff0026dd898800 x20: ffff0026b931dcd8
[ 65.618543] ehci-exynos: EHCI Exynos driver
[ 65.629840] x19: ffffa0001013c0b0 x18: 0000000000000000
[ 65.629843] x17: 0000000000001d50 x16: ffffffffffffe240
[ 65.629847] x15: 00000000000013a8 x14: 0000000000000000
[ 65.629850] x13: 00000000000013a0 x12: 1fffe004db2f7f7c
[ 65.629854] x11: ffff8004db2f7f78 x10: dfffa00000000000
[ 65.629857] x9 : ffffa00028f679e8 x8 : ffffa0002a483a48
[ 65.629861] x7 : ffffa00026d5ed94 x6 : 0000000000000000
[ 65.629864] x5 : ffffa0002a483a48 x4 : 0000000000000000
[ 65.629868] x3 : ffffa000279df03c x2 : 0000000000000000
[ 65.636662] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[ 65.647207] x1 : ef244e124d671400 x0 : 0000000000000004
[ 65.647210] Call trace:
[ 65.647214] megasas_readl+0x60/0x80
[ 65.647218] megasas_read_fw_status_reg_fusion+0x2c/0x38
[ 65.647221] megasas_fault_detect_work+0x44/0x520
[ 65.647226] process_one_work+0x488/0xc08
[ 65.647228] worker_thread+0x68/0x5d0
[ 65.647233] kthread+0x1c8/0x1d0
[ 65.669535] ohci-pci: OHCI PCI platform driver
[ 65.689683] ret_from_fork+0x10/0x18
[ 65.689689] Code: 54ffff09 a94153f3 a8c27bfd d65f03c0 (b9400260)
[ 65.689695] ---[ end trace 3632c7efc4f2d69c ]---
That's 5.6-rc3 .
Please have a look,
John
