# git rev-parse -q --verify baf76f0c58aec435a3a864075b8f6d8ee5d1f17e^{commit}
baf76f0c58aec435a3a864075b8f6d8ee5d1f17e
already have revision, skipping fetch
# git checkout -q -f -B kisskb baf76f0c58aec435a3a864075b8f6d8ee5d1f17e
# git clean -qxdf
# < git log -1
# commit baf76f0c58aec435a3a864075b8f6d8ee5d1f17e
# Author: Linus Torvalds <torvalds@linux-foundation.org>
# Date:   Thu Apr 25 16:13:58 2019 -0700
# 
#     slip: make slhc_free() silently accept an error pointer
#     
#     This way, slhc_free() accepts what slhc_init() returns, whether that is
#     an error or not.
#     
#     In particular, the pattern in sl_alloc_bufs() is
#     
#             slcomp = slhc_init(16, 16);
#             ...
#             slhc_free(slcomp);
#     
#     for the error handling path, and rather than complicate that code, just
#     make it ok to always free what was returned by the init function.
#     
#     That's what the code used to do before commit 4ab42d78e37a ("ppp, slip:
#     Validate VJ compression slot parameters completely") when slhc_init()
#     just returned NULL for the error case, with no actual indication of the
#     details of the error.
#     
#     Reported-by: syzbot+45474c076a4927533d2e@syzkaller.appspotmail.com
#     Fixes: 4ab42d78e37a ("ppp, slip: Validate VJ compression slot parameters completely")
#     Acked-by: Ben Hutchings <ben@decadent.org.uk>
#     Cc: David Miller <davem@davemloft.net>
#     Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
# < /opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-gcc --version
# < /opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-ld --version
# < git log --format=%s --max-count=1 baf76f0c58aec435a3a864075b8f6d8ee5d1f17e
# < make -s -j 48 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  or1ksim_defconfig
# make -s -j 48 ARCH=openrisc O=/kisskb/build/linus_or1ksim_defconfig_or32 CROSS_COMPILE=/opt/cross/kisskb/or1k-linux-5.4.0-20170218/or1k-linux/bin/or1k-linux-  
/kisskb/src/mm/mprotect.c: In function 'change_pte_range':
/kisskb/src/mm/mprotect.c:42:20: warning: unused variable 'mm' [-Wunused-variable]
  struct mm_struct *mm = vma->vm_mm;
                    ^
Completed OK
# rm -rf /kisskb/build/linus_or1ksim_defconfig_or32
# Build took: 0:00:26.948792