diff options
Diffstat (limited to 'debian/patches/bugfix/all/efi-fix-panic-in-kdump-kernel.patch')
| -rw-r--r-- | debian/patches/bugfix/all/efi-fix-panic-in-kdump-kernel.patch | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/debian/patches/bugfix/all/efi-fix-panic-in-kdump-kernel.patch b/debian/patches/bugfix/all/efi-fix-panic-in-kdump-kernel.patch new file mode 100644 index 000000000..009af084b --- /dev/null +++ b/debian/patches/bugfix/all/efi-fix-panic-in-kdump-kernel.patch @@ -0,0 +1,34 @@ +From: Oleksandr Tymoshenko <ovt@google.com> +Date: Sat, 23 Mar 2024 06:33:33 +0000 +Subject: efi: fix panic in kdump kernel +Origin: https://git.kernel.org/linus/62b71cd73d41ddac6b1760402bbe8c4932e23531 + +Check if get_next_variable() is actually valid pointer before +calling it. In kdump kernel this method is set to NULL that causes +panic during the kexec-ed kernel boot. + +Tested with QEMU and OVMF firmware. + +Fixes: bad267f9e18f ("efi: verify that variable services are supported") +Signed-off-by: Oleksandr Tymoshenko <ovt@google.com> +Signed-off-by: Ard Biesheuvel <ardb@kernel.org> +--- + drivers/firmware/efi/efi.c | 2 ++ + 1 file changed, 2 insertions(+) + +diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c +index 8859fb0b006d..fdf07dd6f459 100644 +--- a/drivers/firmware/efi/efi.c ++++ b/drivers/firmware/efi/efi.c +@@ -203,6 +203,8 @@ static bool generic_ops_supported(void) + + name_size = sizeof(name); + ++ if (!efi.get_next_variable) ++ return false; + status = efi.get_next_variable(&name_size, &name, &guid); + if (status == EFI_UNSUPPORTED) + return false; +-- +2.43.0 + |