tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 23ee3e4e5bd27bdbc0f1785eef7209ce872794c7 commit: 913292c97d750fe4188b4f5aa770e5e0ca1e5a91 sched.h: Annotate sighand_struct with __rcu date: 6 months ago config: x86_64-randconfig-s021-20200726 (attached as .config) compiler: gcc-9 (Debian 9.3.0-14) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.2-93-g4c6cbe55-dirty git checkout 913292c97d750fe4188b4f5aa770e5e0ca1e5a91 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=x86_64
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <[email protected]> sparse warnings: (new ones prefixed by >>) >> kernel/livepatch/transition.c:372:44: sparse: sparse: incorrect type in >> argument 1 (different address spaces) @@ expected struct spinlock >> [usertype] *lock @@ got struct spinlock [noderef] <asn:4> * @@ >> kernel/livepatch/transition.c:372:44: sparse: expected struct spinlock >> [usertype] *lock >> kernel/livepatch/transition.c:372:44: sparse: got struct spinlock >> [noderef] <asn:4> * kernel/livepatch/transition.c:374:46: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct spinlock [usertype] *lock @@ got struct spinlock [noderef] <asn:4> * @@ kernel/livepatch/transition.c:374:46: sparse: expected struct spinlock [usertype] *lock kernel/livepatch/transition.c:374:46: sparse: got struct spinlock [noderef] <asn:4> * vim +372 kernel/livepatch/transition.c d83a7cb375eec21 Josh Poimboeuf 2017-02-13 338 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 339 /* 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 340 * Sends a fake signal to all non-kthread tasks with TIF_PATCH_PENDING set. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 341 * Kthreads with TIF_PATCH_PENDING set are woken up. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 342 */ 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 343 static void klp_send_signals(void) 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 344 { 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 345 struct task_struct *g, *task; 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 346 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 347 if (klp_signals_cnt == SIGNALS_TIMEOUT) 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 348 pr_notice("signaling remaining tasks\n"); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 349 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 350 read_lock(&tasklist_lock); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 351 for_each_process_thread(g, task) { 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 352 if (!klp_patch_pending(task)) 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 353 continue; 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 354 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 355 /* 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 356 * There is a small race here. We could see TIF_PATCH_PENDING 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 357 * set and decide to wake up a kthread or send a fake signal. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 358 * Meanwhile the task could migrate itself and the action 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 359 * would be meaningless. It is not serious though. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 360 */ 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 361 if (task->flags & PF_KTHREAD) { 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 362 /* 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 363 * Wake up a kthread which sleeps interruptedly and 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 364 * still has not been migrated. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 365 */ 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 366 wake_up_state(task, TASK_INTERRUPTIBLE); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 367 } else { 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 368 /* 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 369 * Send fake signal to all non-kthread tasks which are 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 370 * still not migrated. 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 371 */ 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 @372 spin_lock_irq(&task->sighand->siglock); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 373 signal_wake_up(task, 0); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 374 spin_unlock_irq(&task->sighand->siglock); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 375 } 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 376 } 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 377 read_unlock(&tasklist_lock); 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 378 } 0b3d52790e1cfd6 Miroslav Benes 2019-01-15 379 :::::: The code at line 372 was first introduced by commit :::::: 0b3d52790e1cfd6b80b826a245d24859e89632f7 livepatch: Remove signal sysfs attribute :::::: TO: Miroslav Benes <[email protected]> :::::: CC: Jiri Kosina <[email protected]> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/[email protected]
.config.gz
Description: application/gzip
