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| author | HATAYAMA Daisuke <[email protected]> | 2013-10-16 20:47:04 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-10-17 04:35:53 +0000 |
| commit | 2cbe3b0af82279f14cfb3195f2406651f28ee9b8 (patch) | |
| tree | 98888ef9e9799eb9e174f45c008df43bc033960a /lib/spinlock_debug.c | |
| parent | writeback: fix negative bdi max pause (diff) | |
| download | kernel-2cbe3b0af82279f14cfb3195f2406651f28ee9b8.tar.gz kernel-2cbe3b0af82279f14cfb3195f2406651f28ee9b8.zip | |
procfs: fix unintended truncation of returned mapped address
Currently, proc_reg_get_unmapped_area truncates upper 32-bit of the
mapped virtual address returned from get_unmapped_area method in
pde->proc_fops due to the variable rv of signed integer on x86_64. This
is too small to have vitual address of unsigned long on x86_64 since on
x86_64, signed integer is of 4 bytes while unsigned long is of 8 bytes.
To fix this issue, use unsigned long instead.
Fixes a regression added in commit c4fe24485729 ("sparc: fix PCI device
proc file mmap(2)").
Signed-off-by: HATAYAMA Daisuke <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: David S. Miller <[email protected]>
Tested-by: Michael Holzheu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/spinlock_debug.c')
0 files changed, 0 insertions, 0 deletions