Daniel J Blueman a36a251710 EDAC, amd64_edac: Prevent OOPS with >16 memory controllers ... commit 0c510cc83b upstream. When DRAM errors occur on memory controllers after EDAC_MAX_MCS (16), the kernel fatally dereferences unallocated structures, see splat below; this occurs on at least NumaConnect systems. Fix by checking if a memory controller info structure was found. BUG: unable to handle kernel NULL pointer dereference at 0000000000000320 IP: [<ffffffff819f714f>] decode_bus_error+0x2f/0x2b0 PGD 2f8b5a3067 PUD 2f8b5a2067 PMD 0 Oops: 0000 [#2] SMP Modules linked in: CPU: 224 PID: 11930 Comm: stream_c.exe.gn Tainted: G D 3.19.0 #1 Hardware name: Supermicro H8QGL/H8QGL, BIOS 3.5b 01/28/2015 task: ffff8807dbfb8c00 ti: ffff8807dd16c000 task.ti: ffff8807dd16c000 RIP: 0010:[<ffffffff819f714f>] [<ffffffff819f714f>] decode_bus_error+0x2f/0x2b0 RSP: 0000:ffff8907dfc03c48 EFLAGS: 00010297 RAX: 0000000000000001 RBX: 9c67400010080a13 RCX: 0000000000001dc6 RDX: 000000001dc61dc6 RSI: ffff8907dfc03df0 RDI: 000000000000001c RBP: ffff8907dfc03ce8 R08: 0000000000000000 R09: 0000000000000022 R10: ffff891fffa30380 R11: 00000000001cfc90 R12: 0000000000000008 R13: 0000000000000000 R14: 000000000000001c R15: 00009c6740001000 FS: 00007fa97ee18700(0000) GS:ffff8907dfc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000320 CR3: 0000003f889b8000 CR4: 00000000000407e0 Stack: 0000000000000000 ffff8907dfc03df0 0000000000000008 9c67400010080a13 000000000000001c 00009c6740001000 ffff8907dfc03c88 ffffffff810e4f9a ffff8907dfc03ce8 ffffffff81b375b9 0000000000000000 0000000000000010 Call Trace: <IRQ> ? vprintk_default ? printk amd_decode_mce notifier_call_chain atomic_notifier_call_chain mce_log machine_check_poll mce_timer_fn ? mce_cpu_restart call_timer_fn.isra.29 run_timer_softirq __do_softirq irq_exit smp_apic_timer_interrupt apic_timer_interrupt <EOI> ? down_read_trylock __do_page_fault ? __schedule do_page_fault page_fault Signed-off-by: Daniel J Blueman <daniel@numascale.com> Link: http://lkml.kernel.org/r/1424144078-24589-1-git-send-email-daniel@numascale.com [ Boris: massage commit message ] Signed-off-by: Borislav Petkov <bp@suse.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2015-03-06 14:43:31 -08:00
..
amd64_edac_dbg.c
amd64_edac_inj.c
amd64_edac.c	EDAC, amd64_edac: Prevent OOPS with >16 memory controllers	2015-03-06 14:43:31 -08:00
amd64_edac.h
amd76x_edac.c
amd8111_edac.c
amd8111_edac.h
amd8131_edac.c
amd8131_edac.h
cell_edac.c
cpc925_edac.c	cpc925_edac: Report UE events properly	2014-11-14 09:00:09 -08:00
e7xxx_edac.c	e7xxx_edac: Report CE events properly	2014-11-14 09:00:08 -08:00
e752x_edac.c	e752x_edac: Fix pci_dev usage count	2013-12-21 13:26:57 +01:00
edac_core.h
edac_device_sysfs.c
edac_device.c	EDAC: Don't try to cancel workqueue when it's never setup	2014-01-10 15:57:36 +01:00
edac_mc_sysfs.c	EDAC: Poll timeout cannot be zero, p2	2014-02-14 10:40:29 +01:00
edac_mc.c	EDAC: Correct workqueue setup path	2014-02-14 10:40:47 +01:00
edac_module.c
edac_module.h	EDAC: Poll timeout cannot be zero, p2	2014-02-14 10:40:29 +01:00
edac_pci_sysfs.c
edac_pci.c
edac_stub.c
ghes_edac.c
highbank_l2_edac.c
highbank_mc_edac.c
i7core_edac.c	i7core_edac: Fix PCI device reference count	2014-02-25 08:54:45 +01:00
i3000_edac.c
i3200_edac.c	i3200_edac: Report CE events properly	2014-11-14 09:00:08 -08:00
i5000_edac.c
i5100_edac.c
i5400_edac.c
i7300_edac.c	i7300_edac: Fix device reference count	2014-02-25 09:43:13 +01:00
i82443bxgx_edac.c
i82860_edac.c	i82860_edac: Report CE events properly	2014-11-14 09:00:08 -08:00
i82875p_edac.c
i82975x_edac.c
Kconfig
Makefile
mce_amd_inj.c
mce_amd.c
mce_amd.h
mpc85xx_edac.c
mpc85xx_edac.h
mv64x60_edac.c
mv64x60_edac.h
octeon_edac-l2c.c
octeon_edac-lmc.c
octeon_edac-pc.c
octeon_edac-pci.c
pasemi_edac.c
ppc4xx_edac.c
ppc4xx_edac.h
r82600_edac.c
sb_edac.c	Merge branch 'x86-ras-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-01-20 12:10:27 -08:00
tile_edac.c
x38_edac.c