And one more negative shift, this time in jbd2/revoke.c in hash() function: ================================================================================ UBSan: Undefined behaviour in ../fs/jbd2/revoke.c:142:9 shift exponent -4 is negative CPU: 3 PID: 1314 Comm: runscript.sh Not tainted 3.18.0-rc1+ #65 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014 0000000000000010 0000000000000000 0000000000000000 ffff8800baba3868 ffffffff82ade70a 000000000000004a fffffffffffffffc ffff8800baba3878 ffffffff819a5339 ffff8800baba3928 ffffffff819a5825 ffff8800baba38b8 Call Trace: dump_stack (/home/andrew/linux/ubsan_x86//lib/dump_stackc:52) ubsan_epilogue (/home/andrew/linux/ubsan_x86//lib/ubsanc:159) __ubsan_handle_shift_out_of_bounds (/home/andrew/linux/ubsan_x86//lib/ubsanc:458) find_revoke_record (/home/andrew/linux/ubsan_x86//fs/jbd2/revokec:142 /home/andrew/linux/ubsan_x86//fs/jbd2/revokec:180) jbd2_journal_cancel_revoke (/home/andrew/linux/ubsan_x86//fs/jbd2/revokec:449) do_get_write_access (/home/andrew/linux/ubsan_x86//fs/jbd2/transactionc:992) jbd2_journal_get_write_access (/home/andrew/linux/ubsan_x86//fs/jbd2/transactionc:1022) __ext4_journal_get_write_access (/home/andrew/linux/ubsan_x86//fs/ext4/ext4_jbd2c:159) ext4_file_open (/home/andrew/linux/ubsan_x86//fs/ext4/filec:238) do_dentry_open (/home/andrew/linux/ubsan_x86//fs/openc:722) ? __inode_permission (/home/andrew/linux/ubsan_x86//fs/nameic:418) ? ext4_check_all_de (/home/andrew/linux/ubsan_x86//fs/ext4/filec:209) finish_open (/home/andrew/linux/ubsan_x86//fs/openc:784) ? may_open (/home/andrew/linux/ubsan_x86//fs/nameic:2572) do_last (/home/andrew/linux/ubsan_x86//fs/nameic:3069) ? link_path_walk (/home/andrew/linux/ubsan_x86//fs/nameic:1495 /home/andrew/linux/ubsan_x86//fs/nameic:1757) ? inode_has_perm (/home/andrew/linux/ubsan_x86//security/selinux/hooksc:1620) path_openat (/home/andrew/linux/ubsan_x86//fs/nameic:699 /home/andrew/linux/ubsan_x86//fs/nameic:3229) do_filp_open (/home/andrew/linux/ubsan_x86//fs/nameic:3260) ? prepare_creds (/home/andrew/linux/ubsan_x86//kernel/credc:269) do_open_exec (/home/andrew/linux/ubsan_x86//fs/execc:762) do_execve_common.isra.21 (/home/andrew/linux/ubsan_x86//fs/execc:1476) ? getname_flags (/home/andrew/linux/ubsan_x86//fs/nameic:160) SyS_execve (/home/andrew/linux/ubsan_x86//fs/execc:1604) stub_execve (/home/andrew/linux/ubsan_x86//arch/x86/kernel/entry_64S:649) ================================================================================ -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
