Hello Frank Holton,
This is a semi-automatic email about new static checker warnings.
The patch f2ee0bf65a1c: "Btrfs: convert printk to btrfs_ and fix
BTRFS prefix" from Dec 20, 2013, leads to the following Smatch
complaint:
fs/btrfs/super.c:298 __btrfs_panic()
error: we previously assumed 'fs_info' could be null (see line 294)
fs/btrfs/super.c
293 errstr = btrfs_decode_error(errno);
294 if (fs_info && (fs_info->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR))
^^^^^^^
Existing check.
295 panic(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (errno=%d %s)\n",
296 s_id, function, line, &vaf, errno, errstr);
297
298 btrfs_crit(fs_info, "panic in %s:%d: %pV (errno=%d %s)",
^^^^^^^
Patch introduces new unchecked dereference inside btrfs_crit().
299 function, line, &vaf, errno, errstr);
300 va_end(args);
regards,
dan carpenter
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