On Wed, Sep 16, 2015 at 8:29 PM, kernel test robot <[email protected]> wrote: > FYI, we noticed the below changes on > > https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git x86/sigcontext > commit 2bdc727abf3a90a0e53849c88c48607e152166b2 ("Revert "x86/kconfig/32: > Rename CONFIG_VM86 and default it to 'n'"") >
I think the bug is attributed to the wrong commit, although the issue might be that your config scripts aren't picking up CONFIG_VM86=y without this patch. Brian, I think this is your bug. Shouldn't arch_dup_task_struct or similar have dst->thread.vm86 = NULL? --Andy > > +-----------------------------------------------------+------------+------------+ > | | 7e01ebffff | > 2bdc727abf | > +-----------------------------------------------------+------------+------------+ > | boot_successes | 33 | 20 > | > | boot_failures | 0 | 15 > | > | BUG_kmalloc-#(Not_tainted):Object_already_free | 0 | 14 > | > | INFO:Allocated_in_alloc_fdmem_age=#cpu=#pid= | 0 | 11 > | > | INFO:Freed_in_kvfree_age=#cpu=#pid= | 0 | 10 > | > | INFO:Slab#objects=#used=#fp=#flags= | 0 | 15 > | > | INFO:Object#@offset=#fp= | 0 | 15 > | > | BUG_kmalloc-#(Tainted:G_B):Object_already_free | 0 | 11 > | > | INFO:Allocated_in_do_execveat_common_age=#cpu=#pid= | 0 | 10 > | > | INFO:Freed_in_free_bprm_age=#cpu=#pid= | 0 | 10 > | > | backtrace:do_group_exit | 0 | 12 > | > | backtrace:SyS_exit_group | 0 | 12 > | > | BUG:unable_to_handle_kernel | 0 | 2 > | > | Oops | 0 | 2 > | > | EIP_is_at_strrchr | 0 | 1 > | > | Kernel_panic-not_syncing:Fatal_exception | 0 | 2 > | > | backtrace:do_execve | 0 | 3 > | > | backtrace:SyS_execve | 0 | 3 > | > | BUG_kmalloc-#(Not_tainted):Poison_overwritten | 0 | 1 > | > | INFO:#-#.First_byte#instead_of | 0 | 1 > | > | INFO:Freed_in_load_elf_binary_age=#cpu=#pid= | 0 | 3 > | > | INFO:Slab#objects=#used=#fp=0x(null)flags= | 0 | 1 > | > | BUG_kmalloc-#(Tainted:G_B):Redzone_overwritten | 0 | 1 > | > | INFO:Allocated_in_do_sys_vm86_age=#cpu=#pid= | 0 | 2 > | > | INFO:Freed_in_exit_thread_age=#cpu=#pid= | 0 | 2 > | > | invoked_oom-killer:gfp_mask=0x | 0 | 1 > | > | Mem-Info | 0 | 1 > | > | Out_of_memory:Kill_process | 0 | 1 > | > | backtrace:vfs_writev | 0 | 1 > | > | backtrace:SyS_writev | 0 | 1 > | > | EIP_is_at_commit_creds | 0 | 1 > | > | INFO:Allocated_in_load_elf_phdrs_age=#cpu=#pid= | 0 | 2 > | > +-----------------------------------------------------+------------+------------+ > > > [ 158.004783] mmap: trinity-c0 (11572) uses deprecated remap_file_pages() > syscall. See Documentation/vm/remap_file_pages.txt. > [ 158.066462] VFS: Warning: trinity-c0 using old stat() call. Recompile your > binary. > [ 158.141967] > ============================================================================= > [ 158.143697] BUG kmalloc-256 (Not tainted): Object already free > [ 158.155727] > ----------------------------------------------------------------------------- > [ 158.155727] > [ 158.158045] Disabling lock debugging due to kernel taint > [ 158.159123] INFO: Allocated in do_sys_vm86+0x44f/0x4b0 age=60 cpu=0 > pid=11572 > [ 158.164703] INFO: Freed in exit_thread+0x89/0xb0 age=27 cpu=0 pid=11586 > [ 158.194498] INFO: Slab 0xcbc5f180 objects=9 used=6 fp=0xc818c6c0 > flags=0x40000080 > [ 158.196060] INFO: Object 0xc818c6c0 @offset=1728 fp=0xc818c1b0 > [ 158.196060] > [ 158.197539] Bytes b4 c818c6b0: 33 2d 00 00 bc 56 ff ff 5a 5a 5a 5a 5a 5a > 5a 5a 3-...V..ZZZZZZZZ > [ 158.199193] Object c818c6c0: 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b > 6b kkkkkkkkkkkkkkkk > > > > > > Thanks, > Ying Huang -- Andy Lutomirski AMA Capital Management, LLC -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
