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| author | Andrey Vatoropin <a.vatoropin@crpt.ru> | 2025-11-18 11:42:31 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2026-01-08 12:14:19 +0300 |
| commit | 0d36db68fdb8a3325386fd9523b67735f944e1f3 (patch) | |
| tree | 3e0f1eb5f6947af9a58045d5a3a59937fc94f069 | |
| parent | d0835714042d4e9ce4d6de121967d3d7709f7a19 (diff) | |
| download | linux-0d36db68fdb8a3325386fd9523b67735f944e1f3.tar.xz | |
scsi: target: Reset t_task_cdb pointer in error case
commit 5053eab38a4c4543522d0c320c639c56a8b59908 upstream.
If allocation of cmd->t_task_cdb fails, it remains NULL but is later
dereferenced in the 'err' path.
In case of error, reset NULL t_task_cdb value to point at the default
fixed-size buffer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: 9e95fb805dc0 ("scsi: target: Fix NULL pointer dereference")
Cc: stable@vger.kernel.org
Signed-off-by: Andrey Vatoropin <a.vatoropin@crpt.ru>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Link: https://patch.msgid.link/20251118084014.324940-1-a.vatoropin@crpt.ru
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/target/target_core_transport.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/target/target_core_transport.c b/drivers/target/target_core_transport.c index 05d29201b730..cf9834f958c9 100644 --- a/drivers/target/target_core_transport.c +++ b/drivers/target/target_core_transport.c @@ -1524,6 +1524,7 @@ target_cmd_init_cdb(struct se_cmd *cmd, unsigned char *cdb, gfp_t gfp) if (scsi_command_size(cdb) > sizeof(cmd->__t_task_cdb)) { cmd->t_task_cdb = kzalloc(scsi_command_size(cdb), gfp); if (!cmd->t_task_cdb) { + cmd->t_task_cdb = &cmd->__t_task_cdb[0]; pr_err("Unable to allocate cmd->t_task_cdb" " %u > sizeof(cmd->__t_task_cdb): %lu ops\n", scsi_command_size(cdb), |