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authorEric W. Biederman <ebiederm@aristanetworks.com>2009-03-04 11:57:20 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2009-03-24 16:38:26 -0700
commite0edd3c65aa5b53e20280565a7ce11675eb7ed6b (patch)
treee9d7a8834eba3f19635f770f5d19bfe88a2485e4 /include
parentae1b41715ee2aae356fbcca032838b71d70b855f (diff)
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sysfs: don't block indefinitely for unmapped files.
Modify sysfs bin files so that we can remove the bin file while they are still mapped. When the kobject is removed we unmap the bin file and arrange for future accesses to the mapping to receive SIGBUS. Implementing this prevents a nasty DOS when pci devices are hot plugged and unplugged. Where if any of their resources were mmaped the kernel could not free up their pci resources or release their pci data structures. [akpm@linux-foundation.org: remove unused var] Signed-off-by: Eric W. Biederman <ebiederm@aristanetworks.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Acked-by: Tejun Heo <tj@kernel.org> Cc: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include')
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