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FreePages() is used to return memory allocated by AllocatePages() #580

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FreePages() is used to return memory allocated by AllocatePages() #580

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dennis-tseng99
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There are several EFI_UNSUPPORTED exceptions in handle_image() of pe.c
Some of them are missing returning page memory to firmware by FreePages(); while some of them are using unmatched FreePoll() function which implicitly is uefi_call_wrapper(BS->FreePool, 1, Buffer) to return memory. According to UEFI spec 2.0, FreePoll() is only used for AllocatePoll() when memory is returned to the available pool.

jsetje
jsetje requested changes Jul 17, 2023
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The diff in relocate_coff() is already merged and can be dropped. Can you merge and re-push? Otherwise this looks like a good fix. Thank you!

(If I don't hear from you I can try to figure out the edit feature.)

@dennis-tseng99
add FreePages function when EFI_UNSUPPORTED
6aff68e 
Signed-off-by: Dennis Tseng <dennis.tseng@suse.com>
@dennis-tseng99
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@jsetje, I've dropped the diff in relocate_coff(). Thank you so much.

@vathpela
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I've pushed this as 1e985a3.

@vathpela vathpela closed this Jul 19, 2023
vathpela added a commit that referenced this pull request Jan 23, 2024
@vathpela
Bump version to 15.8
5914984 
What's changed
* Various CVE fixes:
  CVE-2023-40546 mok: fix LogError() invocation
  CVE-2023-40547 - avoid incorrectly trusting HTTP headers
  CVE-2023-40548 Fix integer overflow on SBAT section size on 32-bit system
  CVE-2023-40549 Authenticode: verify that the signature header is in bounds.
  CVE-2023-40550 pe: Fix an out-of-bound read in verify_buffer_sbat()
  CVE-2023-40551: pe-relocate: Fix bounds check for MZ binaries
* Add make infrastructure to set the NX_COMPAT flag by @vathpela in #530
* Make sbat_var.S parse right with buggy gcc/binutils by @vathpela in #535
* Drop invalid calls to CRYPTO_set_mem_functions by @nicholasbishop in #537
* pe: Align section size up to page size for mem attrs by @nicholasbishop in #539
* test-sbat: Fix exit code by @vathpela in #540
* pe: Add IS_PAGE_ALIGNED macro by @nicholasbishop in #541
* CryptoPkg/BaseCryptLib: Fix buffer overflow issue in realloc wrapper by @nicholasbishop in #546
* Don't loop forever in load_certs() with buggy firmware by @rmetrich in #547
* Block Debian grub binaries with SBAT < 4 by @steve-mcintyre in #550
* Shim unable to locate grubx64 in PXE boot mode when grubx64 is stored in a different file path by @Alberto-Perez-Guevara in #551
* Further improve load_certs() for non-compliant drivers/firmwares by @pbatard in #560
* pe: only process RelocDir->Size of reloc section by @mikebeaton in #562
* Rename 'msecs' to 'usecs' to avoid potential confusion by @aronowski in #563
* Optionally allow to keep shim protocol installed by @bluca in #565
* SBAT-related documents formatting and spelling by @aronowski in #566
* Add SbatLevel_Variable.txt to document the various revocations by @jsetje in #569
* Add a security contact email address in README.md by @vathpela in #572
* Use -Wno-unused-but-set-variable for Cryptlib and OpenSSL by @vathpela in #576
* mok: fix LogError() invocation by @vathpela in #577
* Minor housekeeping by @vathpela in #578
* Test ImageAddress() by @vathpela in #579
* FreePages() is used to return memory allocated by AllocatePages() by @dennis-tseng99 in #580
* Size should minus 1 when calculating 'RelocBaseEnd' by @jsetje in #581
* Verify signature before verifying sbat levels by @jsetje in #583
* Add libFuzzer support for csv.c and sbat.c by @vathpela in #584
* mok: Avoid underflow in maximum variable size calculation by @alpernebbi in #587
* Housekeeping by @vathpela in #605

Signed-off-by: Peter Jones <pjones@redhat.com>
brianredbeard pushed a commit to brianredbeard/redhat-efi-boot-shim that referenced this pull request Feb 22, 2024
@vathpela @brianredbeard
Bump version to 15.8
891edcf 
What's changed
* Various CVE fixes:
  CVE-2023-40546 mok: fix LogError() invocation
  CVE-2023-40547 - avoid incorrectly trusting HTTP headers
  CVE-2023-40548 Fix integer overflow on SBAT section size on 32-bit system
  CVE-2023-40549 Authenticode: verify that the signature header is in bounds.
  CVE-2023-40550 pe: Fix an out-of-bound read in verify_buffer_sbat()
  CVE-2023-40551: pe-relocate: Fix bounds check for MZ binaries
* Add make infrastructure to set the NX_COMPAT flag by @vathpela in rhboot#530
* Make sbat_var.S parse right with buggy gcc/binutils by @vathpela in rhboot#535
* Drop invalid calls to CRYPTO_set_mem_functions by @nicholasbishop in rhboot#537
* pe: Align section size up to page size for mem attrs by @nicholasbishop in rhboot#539
* test-sbat: Fix exit code by @vathpela in rhboot#540
* pe: Add IS_PAGE_ALIGNED macro by @nicholasbishop in rhboot#541
* CryptoPkg/BaseCryptLib: Fix buffer overflow issue in realloc wrapper by @nicholasbishop in rhboot#546
* Don't loop forever in load_certs() with buggy firmware by @rmetrich in rhboot#547
* Block Debian grub binaries with SBAT < 4 by @steve-mcintyre in rhboot#550
* Shim unable to locate grubx64 in PXE boot mode when grubx64 is stored in a different file path by @Alberto-Perez-Guevara in rhboot#551
* Further improve load_certs() for non-compliant drivers/firmwares by @pbatard in rhboot#560
* pe: only process RelocDir->Size of reloc section by @mikebeaton in rhboot#562
* Rename 'msecs' to 'usecs' to avoid potential confusion by @aronowski in rhboot#563
* Optionally allow to keep shim protocol installed by @bluca in rhboot#565
* SBAT-related documents formatting and spelling by @aronowski in rhboot#566
* Add SbatLevel_Variable.txt to document the various revocations by @jsetje in rhboot#569
* Add a security contact email address in README.md by @vathpela in rhboot#572
* Use -Wno-unused-but-set-variable for Cryptlib and OpenSSL by @vathpela in rhboot#576
* mok: fix LogError() invocation by @vathpela in rhboot#577
* Minor housekeeping by @vathpela in rhboot#578
* Test ImageAddress() by @vathpela in rhboot#579
* FreePages() is used to return memory allocated by AllocatePages() by @dennis-tseng99 in rhboot#580
* Size should minus 1 when calculating 'RelocBaseEnd' by @jsetje in rhboot#581
* Verify signature before verifying sbat levels by @jsetje in rhboot#583
* Add libFuzzer support for csv.c and sbat.c by @vathpela in rhboot#584
* mok: Avoid underflow in maximum variable size calculation by @alpernebbi in rhboot#587
* Housekeeping by @vathpela in rhboot#605

Signed-off-by: Peter Jones <pjones@redhat.com>
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@dennis-tseng99 @vathpela @jsetje