https://bugzilla.kernel.org/show_bug.cgi?id=119491 Bug ID: 119491 Summary: UBSAN: Undefined behaviour in /home/vitti/1tb/vitti/rpmbuild/SOURCES/linux-4.5/fs/ex t4/mballoc.c:1274 Product: File System Version: 2.5 Kernel Version: 4.5.5 Hardware: x86-64 OS: Linux Tree: Fedora Status: NEW Severity: low Priority: P1 Component: ext4 Assignee: fs_ext4@xxxxxxxxxxxxxxxxxxxx Reporter: zeccav@xxxxxxxxx Regression: No At boot time I get the following: Jun 02 04:01:53 nero21 kernel: ================================================================================ Jun 02 04:01:53 nero21 kernel: UBSAN: Undefined behaviour in /home/vitti/1tb/vitti/rpmbuild/SOURCES/linux-4.5/fs/ext4/mballoc.c:1274:11 Jun 02 04:01:53 nero21 kernel: shift exponent -1 is negative Jun 02 04:01:53 nero21 kernel: CPU: 1 PID: 1 Comm: systemd Not tainted 4.5.5 #1 Jun 02 04:01:53 nero21 kernel: Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./H81M-DGS R2.0, BIOS P1.30 07/02/2014 Jun 02 04:01:53 nero21 kernel: 0000000000000000 0000000006c36e94 ffff88040cf5b868 ffffffff820d38ba Jun 02 04:01:53 nero21 kernel: ffffffff87f8c73e 0000000006c36e94 ffff88040cf5b890 ffffffff87f8c73e Jun 02 04:01:53 nero21 kernel: ffff88040cf5b880 ffffffff8215e6a4 ffffffffffffffff ffff88040cf5b918 Jun 02 04:01:53 nero21 kernel: Call Trace: Jun 02 04:01:53 nero21 kernel: [<ffffffff820d38ba>] dump_stack+0x74/0xaf Jun 02 04:01:53 nero21 kernel: [<ffffffff8215e6a4>] ubsan_epilogue+0xd/0x3b Jun 02 04:01:53 nero21 kernel: [<ffffffff8215eff5>] __ubsan_handle_shift_out_of_bounds+0xf9/0x14b Jun 02 04:01:53 nero21 kernel: [<ffffffff816c84bc>] ? ext4_mb_init_cache+0x3ed/0x129a Jun 02 04:01:53 nero21 kernel: [<ffffffff816c1037>] mb_find_order_for_block+0xff/0x143 Jun 02 04:01:53 nero21 kernel: [<ffffffff816c1968>] mb_find_extent+0xd7/0x4dd Jun 02 04:01:53 nero21 kernel: [<ffffffff820dcda2>] ? radix_tree_lookup_slot+0x22/0x47 Jun 02 04:01:53 nero21 kernel: [<ffffffff816c5f38>] ext4_mb_complex_scan_group+0x12b/0x577 Jun 02 04:01:53 nero21 kernel: [<ffffffff813d35ad>] ? pagecache_get_page+0x1da/0x516 Jun 02 04:01:53 nero21 kernel: [<ffffffff8148ac9f>] ? ___slab_alloc+0x3fe/0xa5c Jun 02 04:01:53 nero21 kernel: [<ffffffff816cf0b3>] ext4_mb_regular_allocator+0x2e4/0x78d Jun 02 04:01:53 nero21 kernel: [<ffffffff816d2b60>] ext4_mb_new_blocks+0x3cd/0xaa3 Jun 02 04:01:53 nero21 kernel: [<ffffffff816b0660>] ? ext4_ext_put_gap_in_cache+0xe7/0x181 Jun 02 04:01:53 nero21 kernel: [<ffffffff816b8570>] ext4_ext_map_blocks+0xa6c/0x16bf Jun 02 04:01:53 nero21 kernel: [<ffffffff816bdd01>] ? __ext4_handle_dirty_metadata+0x48/0x374 Jun 02 04:01:53 nero21 kernel: [<ffffffff816e19b9>] ? ext4_es_lookup_extent+0x37/0x3d8 Jun 02 04:01:53 nero21 kernel: [<ffffffff8165eeb4>] ext4_map_blocks+0x1c5/0x639 Jun 02 04:01:53 nero21 kernel: [<ffffffff8166504b>] ? ext4_mark_inode_dirty+0x86/0x415 Jun 02 04:01:53 nero21 kernel: [<ffffffff816600cf>] ext4_getblk+0x4e/0x285 Jun 02 04:01:53 nero21 kernel: [<ffffffff81660328>] ext4_bread+0x22/0xce Jun 02 04:01:53 nero21 kernel: [<ffffffff816708c9>] ext4_append+0x89/0x1bf Jun 02 04:01:53 nero21 kernel: [<ffffffff8167a7ed>] ext4_mkdir+0x2e9/0x6ff Jun 02 04:01:53 nero21 kernel: [<ffffffff814eb1a2>] vfs_mkdir+0xe7/0x246 Jun 02 04:01:53 nero21 kernel: [<ffffffff814eb51b>] SyS_mkdir+0x9e/0x17d Jun 02 04:01:53 nero21 kernel: [<ffffffff85c8ec67>] ? SyS_socketpair+0x1cb/0x326 Jun 02 04:01:53 nero21 kernel: [<ffffffff865aa3ee>] entry_SYSCALL_64_fastpath+0x12/0x71 Jun 02 04:01:53 nero21 kernel: ================================================================================ mballoc.c:1274 is "bb += 1 << (e4b->bd_blkbits - order);" -- 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
