Vincent Pelletier
30bf90ccde
usb: gadget: ffs: Forbid usb_ep_alloc_request from sleeping
Found using DEBUG_ATOMIC_SLEEP while submitting an AIO read operation:
[ 100.853642] BUG: sleeping function called from invalid context at mm/slab.h:421
[ 100.861148] in_atomic(): 1, irqs_disabled(): 1, pid: 1880, name: python
[ 100.867954] 2 locks held by python/1880:
[ 100.867961] #0: (&epfile->mutex){....}, at: [<f8188627>] ffs_mutex_lock+0x27/0x30 [usb_f_fs]
[ 100.868020] #1: (&(&ffs->eps_lock)->rlock){....}, at: [<f818ad4b>] ffs_epfile_io.isra.17+0x24b/0x590 [usb_f_fs]
[ 100.868076] CPU: 1 PID: 1880 Comm: python Not tainted 4.14.0-edison+ #118
[ 100.868085] Hardware name: Intel Corporation Merrifield/BODEGA BAY, BIOS 542 2015.01.21:18.19.48
[ 100.868093] Call Trace:
[ 100.868122] dump_stack+0x47/0x62
[ 100.868156] ___might_sleep+0xfd/0x110
[ 100.868182] __might_sleep+0x68/0x70
[ 100.868217] kmem_cache_alloc_trace+0x4b/0x200
[ 100.868248] ? dwc3_gadget_ep_alloc_request+0x24/0xe0 [dwc3]
[ 100.868302] dwc3_gadget_ep_alloc_request+0x24/0xe0 [dwc3]
[ 100.868343] usb_ep_alloc_request+0x16/0xc0 [udc_core]
[ 100.868386] ffs_epfile_io.isra.17+0x444/0x590 [usb_f_fs]
[ 100.868424] ? _raw_spin_unlock_irqrestore+0x27/0x40
[ 100.868457] ? kiocb_set_cancel_fn+0x57/0x60
[ 100.868477] ? ffs_ep0_poll+0xc0/0xc0 [usb_f_fs]
[ 100.868512] ffs_epfile_read_iter+0xfe/0x157 [usb_f_fs]
[ 100.868551] ? security_file_permission+0x9c/0xd0
[ 100.868587] ? rw_verify_area+0xac/0x120
[ 100.868633] aio_read+0x9d/0x100
[ 100.868692] ? __fget+0xa2/0xd0
[ 100.868727] ? __might_sleep+0x68/0x70
[ 100.868763] SyS_io_submit+0x471/0x680
[ 100.868878] do_int80_syscall_32+0x4e/0xd0
[ 100.868921] entry_INT80_32+0x2a/0x2a
[ 100.868932] EIP: 0xb7fbb676
[ 100.868941] EFLAGS: 00000292 CPU: 1
[ 100.868951] EAX: ffffffda EBX: b7aa2000 ECX: 00000002 EDX: b7af8368
[ 100.868961] ESI: b7fbb660 EDI: b7aab000 EBP: bfb6c658 ESP: bfb6c638
[ 100.868973] DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
Signed-off-by: Vincent Pelletier <plr.vincent@gmail.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
2017-11-27 13:33:16 +02:00
..
2017-11-02 11:10:55 +01:00
2017-11-17 14:51:24 -08:00
2017-11-14 16:54:12 -08:00
2017-11-16 09:10:59 -08:00
2017-11-15 14:11:41 -08:00
2017-11-21 15:57:07 -08:00
2017-11-13 17:56:58 -08:00
2017-11-21 16:35:54 -08:00
2017-11-15 11:56:19 -08:00
2017-11-21 16:35:54 -08:00
2017-11-04 09:26:51 +09:00
2017-11-16 16:05:01 -08:00
2017-11-14 15:32:19 -08:00
2017-11-26 14:11:54 -08:00
2017-11-17 20:04:24 -08:00
2017-11-23 16:29:05 +01:00
2017-10-22 02:22:39 +01:00
2017-11-13 19:43:50 -08:00
2017-11-16 12:47:46 -08:00
2017-11-16 12:47:46 -08:00
2017-11-17 09:51:57 -08:00
2017-11-13 01:41:39 +01:00
2017-11-02 11:10:55 +01:00
2017-11-14 16:49:31 -08:00
2017-11-17 14:58:01 -08:00
2017-11-15 13:46:33 -08:00
2017-11-02 11:10:55 +01:00
2017-11-13 21:14:07 -08:00
2017-11-13 17:56:58 -08:00
2017-11-21 15:46:44 -08:00
2017-11-02 11:10:55 +01:00
2017-11-16 09:10:59 -08:00
2017-11-16 10:57:11 -08:00
2017-11-25 08:37:16 -10:00
2017-11-21 15:57:07 -08:00
2017-11-15 13:35:43 -08:00
2017-11-16 09:10:59 -08:00
2017-11-16 01:03:19 -08:00
2017-11-17 20:16:20 -08:00
2017-11-16 09:10:59 -08:00
2017-11-17 11:54:55 -08:00
2017-11-19 08:04:41 -10:00
2017-11-13 01:34:14 +01:00
2017-11-21 15:57:07 -08:00
2017-11-21 16:35:54 -08:00
2017-11-21 16:35:54 -08:00
2017-11-21 15:57:07 -08:00
2017-11-26 14:39:20 -08:00
2017-11-21 15:57:09 -08:00
2017-11-14 18:09:31 -08:00
2017-11-21 15:46:44 -08:00
2017-11-13 17:56:58 -08:00
2017-11-15 13:39:18 -08:00
2017-11-02 11:10:55 +01:00
2017-11-17 10:56:56 -08:00
2017-11-21 16:35:54 -08:00
2017-11-16 16:05:01 -08:00
2017-11-21 15:57:07 -08:00
2017-11-15 13:46:33 -08:00
2017-11-21 15:57:07 -08:00
2017-11-17 16:10:01 -08:00
2017-11-21 15:57:07 -08:00
2017-11-25 08:37:16 -10:00
2017-11-25 08:37:16 -10:00
2017-11-21 15:57:09 -08:00
2017-11-21 15:57:07 -08:00
2017-11-13 12:10:24 -08:00
2017-11-17 09:51:57 -08:00
2017-11-16 11:27:04 -07:00
2017-11-16 09:10:59 -08:00
2017-11-20 21:38:41 -10:00
2017-11-02 11:10:55 +01:00
2017-11-02 11:10:55 +01:00
2017-11-16 09:10:59 -08:00
2017-11-26 14:11:54 -08:00
2017-11-17 16:10:04 -08:00
2017-11-15 10:56:56 -08:00
2017-11-13 21:14:07 -08:00
2017-11-16 10:57:11 -08:00
2017-11-25 08:37:16 -10:00
2017-11-02 11:10:55 +01:00
2017-11-15 13:37:15 -08:00
2017-11-21 15:57:07 -08:00
2017-11-16 13:06:27 -08:00
2017-11-22 21:09:18 -10:00
2017-11-17 16:56:17 -08:00
2017-11-13 17:56:58 -08:00
2017-11-16 09:15:57 -08:00
2017-11-17 20:14:10 -08:00
2017-11-16 16:05:01 -08:00
2017-11-17 20:12:08 -08:00
2017-11-25 08:37:16 -10:00
2017-11-21 16:35:54 -08:00
2017-11-17 20:21:44 -08:00
2017-11-25 08:37:16 -10:00
2017-11-14 16:54:12 -08:00
2017-11-16 16:05:01 -08:00
2017-11-10 21:33:51 +00:00
2017-11-02 11:10:55 +01:00
2017-11-21 16:35:54 -08:00
2017-11-25 08:37:16 -10:00
2017-11-02 11:10:55 +01:00
2017-11-17 14:31:27 -08:00
2017-11-16 09:10:59 -08:00
2017-11-21 16:35:54 -08:00
2017-11-02 11:10:55 +01:00
2017-11-27 13:33:16 +02:00
2017-11-21 15:57:07 -08:00
2017-11-14 16:47:47 -08:00
2017-11-17 12:08:18 -08:00
2017-11-20 21:50:24 -10:00
2017-11-14 23:57:38 +02:00
2017-11-16 09:10:59 -08:00
2017-11-16 09:10:59 -08:00
2017-11-21 15:57:07 -08:00
2017-11-21 15:57:05 -08:00
2017-11-02 11:10:55 +01:00
2017-11-13 01:40:52 +01:00
2017-11-13 01:40:52 +01:00