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| author | Konstantin Belousov <kib@FreeBSD.org> | 2024-03-02 04:58:57 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2024-03-08 18:48:02 +0000 |
| commit | 1c1fde7540d813703d775e013a950145224f182e (patch) | |
| tree | b1f99c0b6b8594e26830bcb663d7f48e3d9497ac | |
| parent | 2feed11fbe6db38cbc82d3efc51a9a7cdfb12e0f (diff) | |
| download | src-1c1fde7540d813703d775e013a950145224f182e.tar.gz src-1c1fde7540d813703d775e013a950145224f182e.zip | |
getblkx(9): be more tolerant but also strict with the buffer size checks
PR: 277414
(cherry picked from commit 7e4ac11b6076e6a9bf7341ddeae22784284ed733)
| -rw-r--r-- | sys/kern/vfs_bio.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/sys/kern/vfs_bio.c b/sys/kern/vfs_bio.c index 546b6dfb6239..78dc6f511a4e 100644 --- a/sys/kern/vfs_bio.c +++ b/sys/kern/vfs_bio.c @@ -3963,9 +3963,11 @@ getblkx(struct vnode *vp, daddr_t blkno, daddr_t dblkno, int size, int slpflag, ("GB_KVAALLOC only makes sense with GB_UNMAPPED")); if (vp->v_type != VCHR) ASSERT_VOP_LOCKED(vp, "getblk"); - if (size > maxbcachebuf) - panic("getblk: size(%d) > maxbcachebuf(%d)\n", size, + if (size > maxbcachebuf) { + printf("getblkx: size(%d) > maxbcachebuf(%d)\n", size, maxbcachebuf); + return (EIO); + } if (!unmapped_buf_allowed) flags &= ~(GB_UNMAPPED | GB_KVAALLOC); @@ -4132,6 +4134,12 @@ newbuf_unlocked: vmio = vp->v_object != NULL; if (vmio) { maxsize = size + (offset & PAGE_MASK); + if (maxsize > maxbcachebuf) { + printf( + "getblkx: maxsize(%d) > maxbcachebuf(%d)\n", + maxsize, maxbcachebuf); + return (EIO); + } } else { maxsize = size; /* Do not allow non-VMIO notmapped buffers. */ |