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| author | Max Filippov <[email protected]> | 2024-03-20 18:26:07 +0000 |
|---|---|---|
| committer | Kees Cook <[email protected]> | 2024-03-21 17:05:47 +0000 |
| commit | 2aea94ac14d1e0a8ae9e34febebe208213ba72f7 (patch) | |
| tree | 159784ee20375fc7bf45dfda324761fdbfd3615e /drivers/net/ethernet/intel/igc/igc_main.c | |
| parent | selftests/exec: Convert remaining /bin/sh to /bin/bash (diff) | |
| download | kernel-2aea94ac14d1e0a8ae9e34febebe208213ba72f7.tar.gz kernel-2aea94ac14d1e0a8ae9e34febebe208213ba72f7.zip | |
exec: Fix NOMMU linux_binprm::exec in transfer_args_to_stack()
In NOMMU kernel the value of linux_binprm::p is the offset inside the
temporary program arguments array maintained in separate pages in the
linux_binprm::page. linux_binprm::exec being a copy of linux_binprm::p
thus must be adjusted when that array is copied to the user stack.
Without that adjustment the value passed by the NOMMU kernel to the ELF
program in the AT_EXECFN entry of the aux array doesn't make any sense
and it may break programs that try to access memory pointed to by that
entry.
Adjust linux_binprm::exec before the successful return from the
transfer_args_to_stack().
Cc: <[email protected]>
Fixes: b6a2fea39318 ("mm: variable length argument support")
Fixes: 5edc2a5123a7 ("binfmt_elf_fdpic: wire up AT_EXECFD, AT_EXECFN, AT_SECURE")
Signed-off-by: Max Filippov <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Kees Cook <[email protected]>
Diffstat (limited to 'drivers/net/ethernet/intel/igc/igc_main.c')
0 files changed, 0 insertions, 0 deletions