On 01/26/16 11:13, Chris Bainbridge wrote: > Booting 4.5.0-rc1 with new UBSAN checker enabled: > > [ 3.859690] > ================================================================================ > [ 3.859694] UBSAN: Undefined behaviour in fs/btrfs/inode.c:5845:10 > [ 3.859696] signed integer overflow: > [ 3.859697] 9223372036854775807 + 1 cannot be represented in type 'long > long int' > [ 3.859701] CPU: 3 PID: 3237 Comm: polkitd Not tainted 4.5.0-rc1 #252 > [ 3.859702] Hardware name: Apple Inc. MacBookPro10,2/Mac-AFD8A9D944EA4843, > BIOS MBP102.88Z.0106.B0A.1509130955 09/13/2015 > [ 3.859706] 0000000000000000 0000000000000000 0000000000000001 > ffff88024d4bfcf8 > [ 3.859709] ffffffff81b2e7d9 0000000000000001 ffff88024d4bfd28 > ffff88024d4bfd10 > [ 3.859711] ffffffff81bcb87d ffffffff83aceb48 ffff88024d4bfd98 > ffffffff81bcbc4d > [ 3.859712] Call Trace: > [ 3.859719] [<ffffffff81b2e7d9>] dump_stack+0x45/0x6c > [ 3.859723] [<ffffffff81bcb87d>] ubsan_epilogue+0xd/0x40 > [ 3.859725] [<ffffffff81bcbc4d>] handle_overflow+0xbd/0xe0 > [ 3.859728] [<ffffffff81bcbc7e>] __ubsan_handle_add_overflow+0xe/0x10 > [ 3.859732] [<ffffffff818c6271>] btrfs_real_readdir+0x881/0xc10 > [ 3.859737] [<ffffffff8148b05d>] iterate_dir+0xdd/0x2d0 > [ 3.859740] [<ffffffff8148bb0b>] SyS_getdents+0x9b/0x110 > [ 3.859743] [<ffffffff8148b250>] ? iterate_dir+0x2d0/0x2d0 > [ 3.859747] [<ffffffff82b40a57>] entry_SYSCALL_64_fastpath+0x12/0x6a > [ 3.859749] > ================================================================================
https://patchwork.kernel.org/patch/7611351/ -h
