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Range-check values building mbdev in boot monitor

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Antoine Leca 2011-08-31 13:54:31 +02:00 committed by Arun Thomas
parent 5cddf6dce8
commit 9df7ce09aa
1 changed files with 3 additions and 3 deletions
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6
boot/boot/boot.c
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@ -1228,9 +1228,9 @@ dev_t name2dev(char *name)
} }
} }
mbdev = (u32_t)tmpdev.device << 24 mbdev = (u32_t)(tmpdev.device & 0xff) << 24
| (u32_t)tmpdev.primary << 16 | (u32_t)(tmpdev.primary & 0xff) << 16
| (u32_t)tmpdev.secondary << 8 | (u32_t)(tmpdev.secondary & 0xff) << 8 /* (-1 & 0xff) is 0xff */
| 0xff; | 0xff;
/* Look the name up on the boot device for the UNIX device number. */ /* Look the name up on the boot device for the UNIX device number. */