https://bugzilla.kernel.org/show_bug.cgi?id=114701 Bug ID: 114701 Summary: ubsan: "shift exponent -1 is negative" in fs/ext4/mballoc.c:2612:15 Product: File System Version: 2.5 Kernel Version: 4.5.0 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@xxxxxxxxxxxxxxxxxxxx Reporter: peter@xxxxxxxxxxxx Regression: No The following message appeared during boot: Mar 15 12:09:22 ivy kernel: ================================================================================ Mar 15 12:09:22 ivy kernel: UBSAN: Undefined behaviour in fs/ext4/mballoc.c:2612:15 Mar 15 12:09:22 ivy kernel: shift exponent -1 is negative Mar 15 12:09:22 ivy kernel: CPU: 1 PID: 657 Comm: mount Not tainted 4.5.0-pege1 #1 Mar 15 12:09:22 ivy kernel: Hardware name: Hewlett-Packard HP ENVY dv6 Notebook PC/181B, BIOS F.29 10/03/2013 Mar 15 12:09:22 ivy kernel: 0000000000000000 00000000450d838f ffffffff816fcef7 0000000000000001 Mar 15 12:09:22 ivy kernel: 00000000450d838f ffff880449cfbb90 ffff880449cfbc10 ffffffff817952a9 Mar 15 12:09:22 ivy kernel: ffffffffc324f17e ffffffff81795caa 0000000000000202 000000000000312d Mar 15 12:09:22 ivy kernel: Call Trace: Mar 15 12:09:22 ivy kernel: [<ffffffff816fcef7>] ? dump_stack+0x70/0xb9 Mar 15 12:09:22 ivy kernel: [<ffffffff817952a9>] ? ubsan_epilogue+0x9/0x40 Mar 15 12:09:22 ivy kernel: [<ffffffff81795caa>] ? __ubsan_handle_shift_out_of_bounds+0xfa/0x150 Mar 15 12:09:22 ivy kernel: [<ffffffff81380031>] ? use_mm+0x3e1/0x5d0 Mar 15 12:09:22 ivy kernel: [<ffffffffc310e408>] ? ext4_mb_init+0xbf8/0xf70 [ext4] Mar 15 12:09:22 ivy kernel: [<ffffffffc31146db>] ? ext4_setup_system_zone+0x20b/0x4d0 [ext4] Mar 15 12:09:22 ivy kernel: [<ffffffffc30cbd5e>] ? ext4_fill_super+0x52fe/0x83a0 [ext4] Mar 15 12:09:22 ivy kernel: [<ffffffff817252b9>] ? snprintf+0x49/0x60 Mar 15 12:09:22 ivy kernel: [<ffffffffc30c6a60>] ? ext4_calculate_overhead+0xc90/0xc90 [ext4] Mar 15 12:09:22 ivy kernel: [<ffffffff8145a549>] ? mount_bdev+0x1a9/0x290 Mar 15 12:09:22 ivy kernel: [<ffffffff8145bbba>] ? mount_fs+0x4a/0x280 Mar 15 12:09:22 ivy kernel: [<ffffffff81499906>] ? vfs_kern_mount+0x76/0x290 Mar 15 12:09:22 ivy kernel: [<ffffffff814a118c>] ? do_mount+0x2ac/0x1be0 Mar 15 12:09:22 ivy kernel: [<ffffffff814a0bd5>] ? copy_mount_options+0x35/0x320 Mar 15 12:09:22 ivy kernel: [<ffffffff814a3274>] ? SyS_mount+0x84/0xc0 Mar 15 12:09:22 ivy kernel: [<ffffffff81dfbcf6>] ? entry_SYSCALL_64_fastpath+0x16/0x75 Mar 15 12:09:22 ivy kernel: ================================================================================ Let me know if you need more information. -- You are receiving this mail because: You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
