Buildresult: linus/xtensa-defconfig/xtensa-gcc8 built on Jun 16 2021, 05:34

kisskb

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Status:	OK
Date/Time:	Jun 16 2021, 05:34
Duration:	0:00:21.776362
Builder:	ka4
Revision:	proc: only require mm_struct for writing (`94f0b2d4a1d0c52035aef425da5e022bd2cb1c71)`
Target:	linus/xtensa-defconfig/xtensa-gcc8
Branch:	linus
Compiler:	xtensa-gcc8 (xtensa-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.26.1)
Config:	defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71^{commit} 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 already have revision, skipping fetch # git checkout -q -f -B kisskb 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 # git clean -qxdf # < git log -1 # commit 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 # Author: Linus Torvalds <torvalds@linux-foundation.org> # Date: Tue Jun 15 09:26:19 2021 -0700 # # proc: only require mm_struct for writing # # Commit 591a22c14d3f ("proc: Track /proc/$pid/attr/ opener mm_struct") we # started using __mem_open() to track the mm_struct at open-time, so that # we could then check it for writes. # # But that also ended up making the permission checks at open time much # stricter - and not just for writes, but for reads too. And that in turn # caused a regression for at least Fedora 29, where NIC interfaces fail to # start when using NetworkManager. # # Since only the write side wanted the mm_struct test, ignore any failures # by __mem_open() at open time, leaving reads unaffected. The write() # time verification of the mm_struct pointer will then catch the failure # case because a NULL pointer will not match a valid 'current->mm'. # # Link: https://lore.kernel.org/netdev/YMjTlp2FSJYvoyFa@unreal/ # Fixes: 591a22c14d3f ("proc: Track /proc/$pid/attr/ opener mm_struct") # Reported-and-tested-by: Leon Romanovsky <leon@kernel.org> # Cc: Kees Cook <keescook@chromium.org> # Cc: Christian Brauner <christian.brauner@ubuntu.com> # Cc: Andrea Righi <andrea.righi@canonical.com> # Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> # < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-gcc --version # < /opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux-ld --version # < git log --format=%s --max-count=1 94f0b2d4a1d0c52035aef425da5e022bd2cb1c71 # < make -s -j 120 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux- defconfig # < make -s -j 120 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux- help # make -s -j 120 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux- olddefconfig # make -s -j 120 ARCH=xtensa O=/kisskb/build/linus_xtensa-defconfig_xtensa CROSS_COMPILE=/opt/cross/kisskb/br-xtensa-full-2016.08-613-ge98b4dd/bin/xtensa-linux- Completed OK # rm -rf /kisskb/build/linus_xtensa-defconfig_xtensa # Build took: 0:00:21.776362

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