Kernel warning: WARNING: CPU: 0 PID: 67855 at ../mm/slab.c:2600 cache_grow+0x1bc/0x260()

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Environment

SUSE Linux Enterprise Server 12 Service Pack 3 (SLES 12 SP3)

Situation

With SLES12 SP3 kernel 4.4.155-94.50.1 or older the 'dmesg' output may show the following warning together with a kernel stack trace.

[   67.783281] ------------[ cut here ]------------
[   67.783287] WARNING: CPU: 0 PID: 2210 at ../mm/slab.c:2600 cache_grow+0x1bc/0x260()
[   67.783290] Modules linked in: nfs(+) lockd grace sunrpc fscache ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables x_tables scsi_transport_iscsi af_packet br_netfilter bridge stp llc iscsi_ibft iscsi_boot_sysfs msr e1000e ppdev iTCO_wdt ptp iTCO_vendor_support gpio_ich coretemp pps_core parport_pc parport kvm_intel lpc_ich fjes video mfd_core i2c_i801 acpi_cpufreq shpchp i3200_edac edac_core kvm processor button pcspkr irqbypass kgraft_patch_1_4_3_3(OK) btrfs xor raid6_pq sr_mod cdrom sd_mod ata_generic radeon ata_piix ahci libahci i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops serio_raw ttm libata drm ehci_pci uhci_hcd ehci_hcd usbcore usb_common sg dm_multipath dm_mod scsi_dh_rdac scsi_dh_emc scsi_dh_alua scsi_mod autofs4
[   67.783353] Supported: Yes
[   67.783356] CPU: 0 PID: 2210 Comm: modprobe Tainted: G           O  K    4.4.156-94.55-default #1
[   67.783358] Hardware name: Supermicro X7SB4/E/X7SB4/E, BIOS 1.0c    07/24/2008
[   67.783360]  0000000000000000 ffffffff8132bb50 0000000000000000 ffffffff81a2f1c4
[   67.783364]  ffffffff810819a1
[   67.783365]  00000000000482c0
[   67.783368]  ffff880226c75400 ffff88022660dac0
[   67.783369]  0000000000000000 0000000000000000 ffffffff811ede9c ffffffffa0856e20
[   67.783374] Call Trace:
[   67.783385]  [<ffffffff81019aa9>] dump_trace+0x59/0x340
[   67.783389]  [<ffffffff81019e7a>] show_stack_log_lvl+0xea/0x170
[   67.783393]  [<ffffffff8101ac21>] show_stack+0x21/0x40
[   67.783398]  [<ffffffff8132bb50>] dump_stack+0x5c/0x7c
[   67.783404]  [<ffffffff810819a1>] warn_slowpath_common+0x81/0xb0
[   67.783408]  [<ffffffff811ede9c>] cache_grow+0x1bc/0x260
[   67.783413]  [<ffffffff811eed32>] kmem_cache_alloc+0x172/0x460
[   67.783421]  [<ffffffffa07a379d>] __fscache_register_netfs+0x2d/0x150 [fscache]
[   67.783444]  [<ffffffffa087d07e>] init_nfs_fs+0x1a/0x164 [nfs]
[   67.783449]  [<ffffffff8100213a>] do_one_initcall+0xca/0x1f0
[   67.783454]  [<ffffffff81193886>] do_init_module+0x5a/0x1d7
[   67.783459]  [<ffffffff81112083>] load_module+0x1393/0x1c90
[   67.783465]  [<ffffffff81112b30>] SYSC_finit_module+0x70/0xa0
[   67.783470]  [<ffffffff8161cbc3>] entry_SYSCALL_64_fastpath+0x1e/0xb7
[   67.784792] DWARF2 unwinder stuck at entry_SYSCALL_64_fastpath+0x1e/0xb7

Resolution

This a bug which has been fixed in kernel 4.4.156-94.57.1 and newer.

Cause

Additional Information

Disclaimer

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