From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Sachin Sant <sachinp@linux.vnet.ibm.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range
Date: Thu, 5 Dec 2019 00:30:58 +1100 (AEDT) [thread overview]
Message-ID: <47Sfr32TT0z9sRc@ozlabs.org> (raw)
In-Reply-To: <20191204052909.59145-1-aneesh.kumar@linux.ibm.com>
On Wed, 2019-12-04 at 05:29:09 UTC, "Aneesh Kumar K.V" wrote:
> This patch fix the below kernel crash.
>
> BUG: Unable to handle kernel data access on read at 0xc000000380000000
> Faulting instruction address: 0xc00000000008b6f0
> cpu 0x5: Vector: 300 (Data Access) at [c0000000d8587790]
> pc: c00000000008b6f0: arch_remove_memory+0x150/0x210
> lr: c00000000008b720: arch_remove_memory+0x180/0x210
> sp: c0000000d8587a20
> msr: 800000000280b033
> dar: c000000380000000
> dsisr: 40000000
> current = 0xc0000000d8558600
> paca = 0xc00000000fff8f00 irqmask: 0x03 irq_happened: 0x01
> pid = 1220, comm = ndctl
> enter ? for help
> memunmap_pages+0x33c/0x410
> devm_action_release+0x30/0x50
> release_nodes+0x30c/0x3a0
> device_release_driver_internal+0x178/0x240
> unbind_store+0x74/0x190
> drv_attr_store+0x44/0x60
> sysfs_kf_write+0x74/0xa0
> kernfs_fop_write+0x1b0/0x260
> __vfs_write+0x3c/0x70
> vfs_write+0xe4/0x200
> ksys_write+0x7c/0x140
> system_call+0x5c/0x68
>
> Fixes: 076265907cf9 ("powerpc: Chunk calls to flush_dcache_range in arch_*_memory")
> Reported-by: Sachin Sant <sachinp@linux.vnet.ibm.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Applied to powerpc fixes, thanks.
https://git.kernel.org/powerpc/c/6f4679b956741d2da6ad3ebb738cbe1264ac8781
cheers
next prev parent reply other threads:[~2019-12-04 13:47 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-04 5:29 [PATCH] powerpc/pmem: Fix kernel crash due to wrong range value usage in flush_dcache_range Aneesh Kumar K.V
2019-12-04 13:30 ` Michael Ellerman [this message]
2019-12-04 13:48 ` Sachin Sant
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