Hello everyone In RT system, after Andrew test, found the following calltrace , in KASAN, we record callstack through stack_depot_save(), in this function, may be call alloc_pages, but in RT, the spin_lock replace with rt_mutex in alloc_pages(), if before call this function, the irq is disabled, will trigger following calltrace.
maybe add array[KASAN_STACK_DEPTH] in struct kasan_track to record callstack in RT system. Is there a better solution ？ Thanks Qiang BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:951 [ 14.522262] in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 640, name: mount [ 14.522304] Call Trace: [ 14.522306] dump_stack+0x92/0xc1 [ 14.522313] ___might_sleep.cold.99+0x1b0/0x1ef [ 14.522319] rt_spin_lock+0x3e/0xc0 [ 14.522329] local_lock_acquire+0x52/0x3c0 [ 14.522332] get_page_from_freelist+0x176c/0x3fd0 [ 14.522543] __alloc_pages_nodemask+0x28f/0x7f0 [ 14.522559] stack_depot_save+0x3a1/0x470 [ 14.522564] kasan_save_stack+0x2f/0x40 [ 14.523575] kasan_record_aux_stack+0xa3/0xb0 [ 14.523580] insert_work+0x48/0x340 [ 14.523589] __queue_work+0x430/0x1280 [ 14.523595] mod_delayed_work_on+0x98/0xf0 [ 14.523607] kblockd_mod_delayed_work_on+0x17/0x20 [ 14.523611] blk_mq_run_hw_queue+0x151/0x2b0 [ 14.523620] blk_mq_sched_insert_request+0x2ad/0x470 [ 14.523633] blk_mq_submit_bio+0xd2a/0x2330 [ 14.523675] submit_bio_noacct+0x8aa/0xfe0 [ 14.523693] submit_bio+0xf0/0x550 [ 14.523714] submit_bio_wait+0xfe/0x200 [ 14.523724] xfs_rw_bdev+0x370/0x480 [xfs] [ 14.523831] xlog_do_io+0x155/0x320 [xfs] [ 14.524032] xlog_bread+0x23/0xb0 [xfs] [ 14.524133] xlog_find_head+0x131/0x8b0 [xfs] [ 14.524375] xlog_find_tail+0xc8/0x7b0 [xfs] [ 14.524828] xfs_log_mount+0x379/0x660 [xfs] [ 14.524927] xfs_mountfs+0xc93/0x1af0 [xfs] [ 14.525424] xfs_fs_fill_super+0x923/0x17f0 [xfs] [ 14.525522] get_tree_bdev+0x404/0x680 [ 14.525622] vfs_get_tree+0x89/0x2d0 [ 14.525628] path_mount+0xeb2/0x19d0 [ 14.525648] do_mount+0xcb/0xf0 [ 14.525665] __x64_sys_mount+0x162/0x1b0 [ 14.525670] do_syscall_64+0x33/0x40 [ 14.525674] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 14.525677] RIP: 0033:0x7fd6c15eaade
