diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2006-09-06 03:03:42 -0400 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-09-06 14:00:02 -0400 |
commit | 96dd7421a06a5bc6eb731323b95efcb2fd864854 (patch) | |
tree | a450951e439f897ee92ba6b068efb77c0edc6a1a /kernel/dma.c | |
parent | fe2bbc4832659b7ffc867cac03e0a92ae81e11e4 (diff) |
[PATCH] prevent timespec/timeval to ktime_t overflow
Frank v. Waveren pointed out that on 64bit machines the timespec to
ktime_t conversion might overflow. This is also true for timeval to
ktime_t conversions. This breaks a "sleep inf" on 64bit machines.
While a timespec/timeval with tx.sec = MAX_LONG is valid by specification
the internal representation of ktime_t is based on nanoseconds. The
conversion of seconds to nanoseconds overflows for seconds values >=
(MAX_LONG / NSEC_PER_SEC).
Check the seconds argument to the conversion and limit it to the maximum
time which can be represented by ktime_t.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Frank v Waveren <fvw@var.cx>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/dma.c')
0 files changed, 0 insertions, 0 deletions