pnfs/blocklayout: Fix device leaks on parse failure

Summary

In the Linux kernel, the following vulnerability has been resolved: pnfs/blocklayout: Fix device leaks on parse failure bl_parse_concat() and bl_parse_stripe() allocate a child device array and then parse each child in turn. If parsing a child fails, the failed child is not counted in nr_children and the parent may be left with a children array that bl_free_device() will not release when nr_children is zero. Release the failed child and the already parsed children before returning the error. Also make bl_free_device() release the child array whenever the children pointer is set, so that partially initialised concat or stripe devices are cleaned up correctly. bl_parse_scsi() can also fail after assigning d->bdev_file and dropping the file reference. Clear the pointer after fput() so that an outer cleanup path does not put it again.

Timeline

1. Sep 17, 2026, 4:06 PM UTCCVE published
2. Oct 21, 2026, 12:50 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4 · fixed in 51d162dfb618f6cf3aa5e331c0305e27771ad884; From 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4 · fixed in 8a2494964edac2a13e82441c2bf887548dc3be0b; From 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4 · fixed in 1e1c36b206c659cf94c6755a1d821ed1babd32bc; From 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4 · fixed in 23e4162405c456ce12c772d5882d306135e828ae; From 5c83746a0cf2831d4b59f5cf99ef5fbf138564e4 · fixed in c056f817e4200fb18079d5052c273a22f191ff0a

• Linux Linux

  3.18

• KernelLinux

  From 3.18.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.110; From 6.13.0 · fixed in 6.18.52; From 6.19.0 · fixed in 7.2.6

References 5