Imbus/xv6-riscv-kernel
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When either_copyin/out fails, return an error from write/read

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Add a test to check that read/write return an error
This commit is contained in:
Frans Kaashoek 2020-09-24 13:18:54 -04:00
parent e23d53f27f
commit 05074badc4
2 changed files with 50 additions and 0 deletions
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2
kernel/fs.c
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@ -468,6 +468,7 @@ readi(struct inode *ip, int user_dst, uint64 dst, uint off, uint n)
m = min(n - tot, BSIZE - off%BSIZE);
if(either_copyout(user_dst, dst, bp->data + (off % BSIZE), m) == -1) {
brelse(bp);
tot = -1;
break;
}
brelse(bp);
@ -495,6 +496,7 @@ writei(struct inode *ip, int user_src, uint64 src, uint off, uint n)
m = min(n - tot, BSIZE - off%BSIZE);
if(either_copyin(bp->data + (off % BSIZE), user_src, src, m) == -1) {
brelse(bp);
n = -1;
break;
}
log_write(bp);