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ZIL: Assert record sizes in different places
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This should make sure we have log written without overflows.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by:	Alexander Motin <[email protected]>
Sponsored by:	iXsystems, Inc.
Closes openzfs#15517
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@amotin
amotin authored Nov 28, 2023
1 parent b94ce4e commit 2a27fd4
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Showing 6 changed files with 115 additions and 37 deletions.
9 changes: 7 additions & 2 deletions module/os/freebsd/zfs/zio_crypt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1251,7 +1251,7 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
iovec_t *dst_iovecs;
zil_chain_t *zilc;
lr_t *lr;
uint64_t txtype, lr_len;
uint64_t txtype, lr_len, nused;
uint_t crypt_len, nr_iovecs, vec;
uint_t aad_len = 0, total_len = 0;

Expand All @@ -1268,7 +1268,10 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
zilc = (zil_chain_t *)src;
slrp = src + sizeof (zil_chain_t);
aadp = aadbuf;
blkend = src + ((byteswap) ? BSWAP_64(zilc->zc_nused) : zilc->zc_nused);
nused = ((byteswap) ? BSWAP_64(zilc->zc_nused) : zilc->zc_nused);
ASSERT3U(nused, >=, sizeof (zil_chain_t));
ASSERT3U(nused, <=, datalen);
blkend = src + nused;

/*
* Calculate the number of encrypted iovecs we will need.
Expand All @@ -1287,6 +1290,8 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
txtype = lr->lrc_txtype;
lr_len = lr->lrc_reclen;
}
ASSERT3U(lr_len, >=, sizeof (lr_t));
ASSERT3U(lr_len, <=, blkend - slrp);

nr_iovecs++;
if (txtype == TX_WRITE && lr_len != sizeof (lr_write_t))
Expand Down
9 changes: 7 additions & 2 deletions module/os/linux/zfs/zio_crypt.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1405,7 +1405,7 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
boolean_t *no_crypt)
{
int ret;
uint64_t txtype, lr_len;
uint64_t txtype, lr_len, nused;
uint_t nr_src, nr_dst, crypt_len;
uint_t aad_len = 0, nr_iovecs = 0, total_len = 0;
iovec_t *src_iovecs = NULL, *dst_iovecs = NULL;
Expand All @@ -1432,7 +1432,10 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
zilc = (zil_chain_t *)src;
slrp = src + sizeof (zil_chain_t);
aadp = aadbuf;
blkend = src + ((byteswap) ? BSWAP_64(zilc->zc_nused) : zilc->zc_nused);
nused = ((byteswap) ? BSWAP_64(zilc->zc_nused) : zilc->zc_nused);
ASSERT3U(nused, >=, sizeof (zil_chain_t));
ASSERT3U(nused, <=, datalen);
blkend = src + nused;

/* calculate the number of encrypted iovecs we will need */
for (; slrp < blkend; slrp += lr_len) {
Expand All @@ -1445,6 +1448,8 @@ zio_crypt_init_uios_zil(boolean_t encrypt, uint8_t *plainbuf,
txtype = BSWAP_64(lr->lrc_txtype);
lr_len = BSWAP_64(lr->lrc_reclen);
}
ASSERT3U(lr_len, >=, sizeof (lr_t));
ASSERT3U(lr_len, <=, blkend - slrp);

nr_iovecs++;
if (txtype == TX_WRITE && lr_len != sizeof (lr_write_t))
Expand Down
50 changes: 43 additions & 7 deletions module/zfs/zfs_replay.c
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Original file line number Diff line number Diff line change
Expand Up @@ -309,6 +309,8 @@ zfs_replay_create_acl(void *arg1, void *arg2, boolean_t byteswap)
uint64_t dnodesize;
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lracl));

txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
if (byteswap) {
byteswap_uint64_array(lracl, sizeof (*lracl));
Expand Down Expand Up @@ -470,6 +472,8 @@ zfs_replay_create(void *arg1, void *arg2, boolean_t byteswap)
uint64_t dnodesize;
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr));

txtype = (lr->lr_common.lrc_txtype & ~TX_CI);
if (byteswap) {
byteswap_uint64_array(lr, sizeof (*lr));
Expand Down Expand Up @@ -613,6 +617,8 @@ zfs_replay_remove(void *arg1, void *arg2, boolean_t byteswap)
int error;
int vflg = 0;

ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down Expand Up @@ -648,6 +654,8 @@ zfs_replay_link(void *arg1, void *arg2, boolean_t byteswap)
int error;
int vflg = 0;

ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down Expand Up @@ -715,12 +723,14 @@ zfs_replay_rename(void *arg1, void *arg2, boolean_t byteswap)
{
zfsvfs_t *zfsvfs = arg1;
lr_rename_t *lr = arg2;
char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
char *tname = sname + strlen(sname) + 1;

ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
char *tname = sname + strlen(sname) + 1;
return (do_zfs_replay_rename(zfsvfs, lr, sname, tname, 0, NULL));
}

Expand All @@ -730,12 +740,14 @@ zfs_replay_rename_exchange(void *arg1, void *arg2, boolean_t byteswap)
#ifdef __linux__
zfsvfs_t *zfsvfs = arg1;
lr_rename_t *lr = arg2;
char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
char *tname = sname + strlen(sname) + 1;

ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

char *sname = (char *)(lr + 1); /* sname and tname follow lr_rename_t */
char *tname = sname + strlen(sname) + 1;
return (do_zfs_replay_rename(zfsvfs, lr, sname, tname, RENAME_EXCHANGE,
NULL));
#else
Expand All @@ -750,14 +762,13 @@ zfs_replay_rename_whiteout(void *arg1, void *arg2, boolean_t byteswap)
zfsvfs_t *zfsvfs = arg1;
lr_rename_whiteout_t *lr = arg2;
int error;
/* sname and tname follow lr_rename_whiteout_t */
char *sname = (char *)(lr + 1);
char *tname = sname + strlen(sname) + 1;
/* For the whiteout file. */
xvattr_t xva;
uint64_t objid;
uint64_t dnodesize;

ASSERT3U(lr->lr_rename.lr_common.lrc_reclen, >, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand All @@ -783,6 +794,9 @@ zfs_replay_rename_whiteout(void *arg1, void *arg2, boolean_t byteswap)
if (error)
return (error);

/* sname and tname follow lr_rename_whiteout_t */
char *sname = (char *)(lr + 1);
char *tname = sname + strlen(sname) + 1;
return (do_zfs_replay_rename(zfsvfs, &lr->lr_rename, sname, tname,
RENAME_WHITEOUT, &xva.xva_vattr));
#else
Expand All @@ -800,6 +814,8 @@ zfs_replay_write(void *arg1, void *arg2, boolean_t byteswap)
int error;
uint64_t eod, offset, length;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down Expand Up @@ -863,6 +879,8 @@ zfs_replay_write2(void *arg1, void *arg2, boolean_t byteswap)
int error;
uint64_t end;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down Expand Up @@ -910,6 +928,8 @@ zfs_replay_truncate(void *arg1, void *arg2, boolean_t byteswap)
flock64_t fl = {0};
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down Expand Up @@ -940,6 +960,8 @@ zfs_replay_setattr(void *arg1, void *arg2, boolean_t byteswap)
int error;
void *start;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));

xva_init(&xva);
if (byteswap) {
byteswap_uint64_array(lr, sizeof (*lr));
Expand Down Expand Up @@ -1002,6 +1024,9 @@ zfs_replay_setsaxattr(void *arg1, void *arg2, boolean_t byteswap)
size_t size;
int error = 0;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));
ASSERT3U(lr->lr_common.lrc_reclen, >, sizeof (*lr) + lr->lr_size);

ASSERT(spa_feature_is_active(zfsvfs->z_os->os_spa,
SPA_FEATURE_ZILSAXATTR));
if (byteswap)
Expand Down Expand Up @@ -1079,6 +1104,10 @@ zfs_replay_acl_v0(void *arg1, void *arg2, boolean_t byteswap)
znode_t *zp;
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));
ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr) +
sizeof (ace_t) * lr->lr_aclcnt);

if (byteswap) {
byteswap_uint64_array(lr, sizeof (*lr));
zfs_oldace_byteswap(ace, lr->lr_aclcnt);
Expand Down Expand Up @@ -1124,6 +1153,9 @@ zfs_replay_acl(void *arg1, void *arg2, boolean_t byteswap)
znode_t *zp;
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));
ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr) + lr->lr_acl_bytes);

if (byteswap) {
byteswap_uint64_array(lr, sizeof (*lr));
zfs_ace_byteswap(ace, lr->lr_acl_bytes, B_FALSE);
Expand Down Expand Up @@ -1171,6 +1203,10 @@ zfs_replay_clone_range(void *arg1, void *arg2, boolean_t byteswap)
znode_t *zp;
int error;

ASSERT3U(lr->lr_common.lrc_reclen, >=, sizeof (*lr));
ASSERT3U(lr->lr_common.lrc_reclen, >=, offsetof(lr_clone_range_t,
lr_bps[lr->lr_nbps]));

if (byteswap)
byteswap_uint64_array(lr, sizeof (*lr));

Expand Down
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