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Jakob Koschel 1e327963cf x86/sgx: Avoid using iterator after loop in sgx_mmu_notifier_release()

If &encl_mm->encl->mm_list does not contain the searched 'encl_mm',
'tmp' will not point to a valid sgx_encl_mm struct.

Linus proposed to avoid any use of the list iterator variable after the
loop, in the attempt to move the list iterator variable declaration into
the macro to avoid any potential misuse after the loop. Using it in
a pointer comparison after the loop is undefined behavior and should be
omitted if possible, see Link tag.

Instead, just use a 'found' boolean to indicate if an element was found.

  [ bp: Massage, fix typos. ]

Signed-off-by: Jakob Koschel <jkl820.git@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/CAHk-=wgRr_D8CB-D9Kg-c=EHreAsk5SqXPwr9Y7k9sA6cWXJ6w@mail.gmail.com/
Link: https://lore.kernel.org/r/20230206-sgx-use-after-iter-v2-1-736ca621adc3@gmail.com

2023-06-13 16:21:01 +02:00

..

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

ARM: dts: Fix erroneous ADS touchscreen polarities

2023-06-05 17:39:22 +02:00

Merge tag 'arm-fixes-6.4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

2023-06-10 13:01:09 -07:00

Merge tag 'csky-for-linus-6.4' of https://github.com/c-sky/csky-linux

2023-05-04 12:25:05 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

m68k: Move signal frame following exception on 68020/030

2023-05-22 13:51:20 +02:00

Kconfig: introduce HAS_IOPORT option and select it as necessary

2023-04-05 22:15:19 +02:00

mips: Move initrd_start check after initrd address sanitisation.

2023-05-23 11:01:38 +02:00

Merge tag 'mm-stable-2023-04-27-15-30' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-04-27 19:42:02 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

parisc: Fix flush_dcache_page() for usage from irq context

2023-05-24 19:03:49 +02:00

powerpc/xmon: Use KSYM_NAME_LEN in array size

2023-05-30 16:46:56 +10:00

Merge tag 'riscv-for-linus-6.4-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

2023-06-09 09:36:17 -07:00

Merge tag 's390-6.4-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

2023-06-09 09:29:51 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

Merge tag 'locking-core-2023-05-05' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2023-05-05 12:56:55 -07:00

um: harddog: fix modular build

2023-05-10 00:21:30 +02:00

x86/sgx: Avoid using iterator after loop in sgx_mmu_notifier_release()

2023-06-13 16:21:01 +02:00

Merge tag 'xtensa-20230523' of https://github.com/jcmvbkbc/linux-xtensa

2023-05-23 15:21:34 -07:00

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