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| author | Thomas Gleixner <tglx@linutronix.de> | 2019-11-12 01:03:15 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-11-16 13:23:59 +0300 |
| commit | 8c40397f22a4ff7996d3abdc2d9d1d90f9fc8054 (patch) | |
| tree | fe1c769e70c4cd50c7a1da6589c3625d030a3ce6 /arch/x86/kernel/process_32.c | |
| parent | 31f4f5b495a62c9a8b15b1c3581acd5efeb9af8c (diff) | |
| download | linux-8c40397f22a4ff7996d3abdc2d9d1d90f9fc8054.tar.xz | |
x86/ptrace: Prevent truncation of bitmap size
The active() callback of the IO bitmap regset divides the IO bitmap size by
the word size (32/64 bit). As the I/O bitmap size is in bytes the active
check fails for bitmap sizes of 1-3 bytes on 32bit and 1-7 bytes on 64bit.
Use DIV_ROUND_UP() instead.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Diffstat (limited to 'arch/x86/kernel/process_32.c')
0 files changed, 0 insertions, 0 deletions