u-boot.git/boot/pxe_utils.c, branch v2026.07

boot: pxe_utils: Fix potential initrd_filesize buffer overflow

2026-06-03T15:22:24Z

ulong is 64 bits on 64-bit platforms. Hence, simple_xtoa can produce up to 16 hex characters + NULL byte. The initrd_filesize buffer is only 10 bytes which can cause a buffer overflow on every PXE boot that loads an initrd on an address greater than 4GB. Increase buffer size to 17 bytes to hold the maximum hex representation of a 64-bit address. Signed-off-by: Francois Berder Reviewed-by: Jerome Forissier

cmd: pxe_utils: fix syntax error in comments

2026-02-16T17:52:01Z

Add missing "to" so that the sentence makes sense. Signed-off-by: Hugo Villeneuve

boot: pxe_utils: Fix memory allocation issues in overlay_dir handling

2025-11-22T14:49:09Z

Fix two memory allocation bugs in label_boot_extension(): 1. When label->fdtdir is not set, overlay_dir was used without any memory allocation. 2. When label->fdtdir is set, the allocation size was incorrect, using 'len' (just the fdtdir length) instead of 'dir_len' (which includes the trailing slash and null terminator). Resolve both issues by moving the memory allocation and string formatting outside the conditional block, resulting in clearer code flow and correct sizing in all cases. Closes: https://lists.denx.de/pipermail/u-boot/2025-November/602892.html Addresses-Coverity-ID: 638558 Memory - illegal accesses (UNINIT) Fixes: 935109cd9e97 ("boot: pxe_utils: Add extension board devicetree overlay support") Signed-off-by: Kory Maincent (TI.com) Tested-by: Surkov Kirill

boot: pxe_utils: Add extension board devicetree overlay support

2025-11-03T16:02:39Z

Add support for scanning and applying extension board devicetree overlays during PXE boot. After loading the main board devicetree, the system now scans for available extension boards and applies their overlays automatically. This enables dynamic hardware configuration for systems with extension boards during boot scenarios which are using pxe_utils. Signed-off-by: Kory Maincent (TI.com) Reviewed-by: Simon Glass

boot: pxe: Prevent evaluation of uninitialised variable

2025-07-09T00:15:20Z

In the case where parse_sliteral returns an error then label_name will not have been assigned to. In order to prevent evaluating label_name in this case add a check for the return value of parse_sliteral. Signed-off-by: Andrew Goodbody

boot: Update extlinux pxe_getfile_func() to include type

2025-01-15T14:48:42Z

Add a file-type parameter to this function and update all users. Add a proper comment to the function which we are here. This will allow tracking of the file types loaded by the extlinux bootmeth. Signed-off-by: Simon Glass

boot: pxe: Drop the duplicate comment on get_pxe_file()

2025-01-15T14:48:42Z

This function is exported, so document it in the header file. Drop the duplicate comment in the C file. Signed-off-by: Simon Glass

menu: add support to check if menu needs to be reprinted

2024-11-04T22:41:38Z

This patch adds a new callback named need_reprint for menu. The need_reprint will be called before printing the menu. If the callback exists and returns FALSE, menu printing will be canceled. This is very useful if the menu was not changed. It can save time for serial-based menu to handle more input data. Signed-off-by: Weijie Gao Reviewed-by: Daniel Golle Tested-by: Daniel Golle

boot: Add logic to enable booting from fallback option

2024-10-15T16:24:27Z

The "fallback" extlinux config option allows us to set an alternative default boot option for when it has been detected that the default is failing. Implement the logic required to boot from this option when desired. Signed-off-by: Martyn Welch Reviewed-by: Simon Glass

boot: pxe_utils: Add fallback support

2024-10-15T16:24:27Z

When configured correctly, we can detect when boot fails after the boot process has been handed over to the kernel through the use of U-Boot's bootcount support. In some instances, such as when we are performing atomic updates via a system such as OSTree, it is desirable to provide a fallback option so that we can return to a previous (hopefully working) state. Add a "fallback" option to the supported extlinux configuration options that points to a label like "default" so that we can utilise this in later commits. Signed-off-by: Martyn Welch Reviewed-by: Simon Glass