https://bugzilla.kernel.org/show_bug.cgi?id=112161 Bug ID: 112161 Summary: UBSAN: Undefined behaviour in fs/ext4/mballoc.c:1274:11 Product: File System Version: 2.5 Kernel Version: 4.5.0-rc3 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: ext4 Assignee: fs_ext4@xxxxxxxxxxxxxxxxxxxx Reporter: onorua@xxxxxxxxx Regression: No Created attachment 203141 --> https://bugzilla.kernel.org/attachment.cgi?id=203141&action=edit journal-b1 output After the upgrade to new kernel I've got following stack trace: Feb 08 22:58:57 x kernel: ================================================================================ Feb 08 22:58:57 x kernel: UBSAN: Undefined behaviour in fs/ext4/mballoc.c:1274:11 Feb 08 22:58:57 x kernel: shift exponent -1 is negative Feb 08 22:58:57 x kernel: CPU: 2 PID: 1550 Comm: alsactl Tainted: G O 4.5.0-rc3 #98 Feb 08 22:58:57 x kernel: Hardware name: LENOVO 20BSCTO1WW/20BSCTO1WW, BIOS N14ET32W (1.10 ) 08/13/2015 Feb 08 22:58:57 x kernel: 0000000000000000 000000004a465bb8 ffff8802211a7908 ffffffff81832ca4 Feb 08 22:58:57 x kernel: ffffffffffffffff 000000004a465bb8 ffff8802211a7930 0000000000000001 Feb 08 22:58:57 x kernel: ffff8802211a7920 ffffffff818a6360 ffffffff82dbd13e ffff8802211a79c0 Feb 08 22:58:57 x kernel: Call Trace: Feb 08 22:58:57 x kernel: [<ffffffff81832ca4>] dump_stack+0xaf/0x10c Feb 08 22:58:57 x kernel: [<ffffffff818a6360>] ubsan_epilogue+0x14/0x56 Feb 08 22:58:57 x kernel: [<ffffffff818a6e04>] __ubsan_handle_shift_out_of_bounds+0x190/0x1c9 Feb 08 22:58:57 x kernel: [<ffffffff8234999a>] ? _raw_spin_unlock+0x6e/0xac Feb 08 22:58:57 x kernel: [<ffffffff815ccb4e>] ? ext4_mb_init_cache+0x12fd/0x1355 Feb 08 22:58:57 x kernel: [<ffffffff815c85ea>] mb_find_order_for_block+0x1a6/0x1ed Feb 08 22:58:57 x kernel: [<ffffffff815c85ea>] ? mb_find_order_for_block+0x1a6/0x1ed Feb 08 22:58:57 x kernel: [<ffffffff815c9702>] mb_find_extent+0x213/0x63f Feb 08 22:58:57 x kernel: [<ffffffff815d1f17>] ext4_mb_complex_scan_group+0x148/0x7f2 Feb 08 22:58:57 x kernel: [<ffffffff81129fbb>] ? get_parent_ip+0x14/0x6d Feb 08 22:58:57 x kernel: [<ffffffff815d2d8c>] ext4_mb_regular_allocator+0x7cb/0x9d2 Feb 08 22:58:57 x kernel: [<ffffffff815dcd55>] ext4_mb_new_blocks+0x750/0x104e Feb 08 22:58:57 x kernel: [<ffffffff815b1778>] ? ext4_find_extent+0x6b6/0x6e6 Feb 08 22:58:57 x kernel: [<ffffffff815bb9d4>] ext4_ext_map_blocks+0x17a2/0x217c Feb 08 22:58:57 x kernel: [<ffffffff815419ba>] ext4_map_blocks+0x5c1/0x95b Feb 08 22:58:57 x kernel: [<ffffffff81541dcc>] ext4_getblk+0x78/0x32a Feb 08 22:58:57 x kernel: [<ffffffff815420a7>] ext4_bread+0x29/0x144 Feb 08 22:58:57 x kernel: [<ffffffff81559dc2>] ext4_append+0x196/0x2d7 Feb 08 22:58:57 x kernel: [<ffffffff815656ca>] ext4_mkdir+0x56d/0x998 Feb 08 22:58:57 x kernel: [<ffffffff813fe640>] vfs_mkdir+0x23b/0x355 Feb 08 22:58:57 x kernel: [<ffffffff814094ea>] SyS_mkdirat+0x163/0x1d9 Feb 08 22:58:57 x kernel: [<ffffffff81409580>] SyS_mkdir+0x20/0x29 Feb 08 22:58:57 x kernel: [<ffffffff82349e57>] entry_SYSCALL_64_fastpath+0x12/0x66 Feb 08 22:58:57 x kernel: ================================================================================ Please let me know if you need any further 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
