Re: UBSAN: Undefined error in log2.h

2017-09-06 Thread Randy Dunlap
[add Al Viro and linux-fsdevel] On 09/05/17 21:58, Shankara Pailoor wrote: > Hi, > > I am hitting this bug when running the syzkaller fuzzer on kernel 4.13-rc7 > > Syzkaller hit 'UBSAN: Undefined behaviour in ./include/linux/log2.h:LINE' bug. > > Guilty file: fs/pipe.c > > Maintainers: [] > >

UBSAN: Undefined error in log2.h

2017-09-05 Thread Shankara Pailoor
Hi, I am hitting this bug when running the syzkaller fuzzer on kernel 4.13-rc7 Syzkaller hit 'UBSAN: Undefined behaviour in ./include/linux/log2.h:LINE' bug. Guilty file: fs/pipe.c Maintainers: [] UBSAN: Undefined behaviour in ./include/linux/log2.h:57:13 shift exponent 64 is too large for 64-