Buildresult: powerpc-fixes/mmu_defconfig/microblaze-gcc5 built on Mar 17 2021, 17:00

kisskb

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Status:	OK
Date/Time:	Mar 17 2021, 17:00
Duration:	0:01:12.442157
Builder:	ka4
Revision:	PCI: rpadlpar: Fix potential drc_name corruption in store functions (`cc7a0bb058b85ea03db87169c60c7cfdd5d34678)`
Target:	powerpc-fixes/mmu_defconfig/microblaze-gcc5
Branch:	powerpc-fixes
Compiler:	microblaze-gcc5 (microblazeel-linux-gcc.br_real (Buildroot 2016.11-git-00613-ge98b4dd) 5.4.0 / GNU ld (GNU Binutils) 2.26.1)
Config:	mmu_defconfig (download)
Log:	Download original No warnings found in log. Full Log # git rev-parse -q --verify cc7a0bb058b85ea03db87169c60c7cfdd5d34678^{commit} cc7a0bb058b85ea03db87169c60c7cfdd5d34678 already have revision, skipping fetch # git checkout -q -f -B kisskb cc7a0bb058b85ea03db87169c60c7cfdd5d34678 # git clean -qxdf # < git log -1 # commit cc7a0bb058b85ea03db87169c60c7cfdd5d34678 # Author: Tyrel Datwyler <tyreld@linux.ibm.com> # Date: Mon Mar 15 15:48:21 2021 -0600 # # PCI: rpadlpar: Fix potential drc_name corruption in store functions # # Both add_slot_store() and remove_slot_store() try to fix up the # drc_name copied from the store buffer by placing a NUL terminator at # nbyte + 1 or in place of a '\n' if present. However, the static buffer # that we copy the drc_name data into is not zeroed and can contain # anything past the n-th byte. # # This is problematic if a '\n' byte appears in that buffer after nbytes # and the string copied into the store buffer was not NUL terminated to # start with as the strchr() search for a '\n' byte will mark this # incorrectly as the end of the drc_name string resulting in a drc_name # string that contains garbage data after the n-th byte. # # Additionally it will cause us to overwrite that '\n' byte on the stack # with NUL, potentially corrupting data on the stack. # # The following debugging shows an example of the drmgr utility writing # "PHB 4543" to the add_slot sysfs attribute, but add_slot_store() # logging a corrupted string value. # # drmgr: drmgr: -c phb -a -s PHB 4543 -d 1 # add_slot_store: drc_name = PHB 4543°\|<82>!, rc = -19 # # Fix this by using strscpy() instead of memcpy() to ensure the string # is NUL terminated when copied into the static drc_name buffer. # Further, since the string is now NUL terminated the code only needs to # change '\n' to '\0' when present. # # Cc: stable@vger.kernel.org # Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> # [mpe: Reformat change log and add mention of possible stack corruption] # Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> # Link: https://lore.kernel.org/r/20210315214821.452959-1-tyreld@linux.ibm.com # < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-gcc --version # < /opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux-ld --version # < git log --format=%s --max-count=1 cc7a0bb058b85ea03db87169c60c7cfdd5d34678 # < make -s -j 10 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- mmu_defconfig # < make -s -j 10 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- help # make -s -j 10 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- olddefconfig # make -s -j 10 ARCH=microblaze O=/kisskb/build/powerpc-fixes_mmu_defconfig_microblaze CROSS_COMPILE=/opt/cross/kisskb/br-microblaze-full-2016.08-613-ge98b4dd/bin/microblazeel-linux- Kernel: arch/microblaze/boot/linux.bin is ready (#1) Completed OK # rm -rf /kisskb/build/powerpc-fixes_mmu_defconfig_microblaze # Build took: 0:01:12.442157

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