Hello, While running the kcapi test suite on a SAMA5D2 Xplained board with a v4.14-rc6 kernel, I encountered the following error: # kcapi -x 9 -e -c "cbc(aes)" -i 00000000000000000000000000000000 -k 00000000000 0000000000000000000000000000000000000 -p 1b077a6af4b7f98229de786d7516b639 BUG: scheduling while atomic: kcapi/926/0x00000100 CPU: 0 PID: 926 Comm: kcapi Not tainted 4.14.0-rc6 #2 Hardware name: Atmel SAMA5 [<c010caac>] (unwind_backtrace) from [<c010a9d8>] (show_stack+0x10/0x14) [<c010a9d8>] (show_stack) from [<c013a914>] (__schedule_bug+0x60/0x80) [<c013a914>] (__schedule_bug) from [<c074ac70>] (__schedule+0x368/0x3fc) [<c074ac70>] (__schedule) from [<c074ad74>] (schedule+0x40/0xa0) [<c074ad74>] (schedule) from [<c05cb96c>] (__lock_sock+0x78/0xb0) [<c05cb96c>] (__lock_sock) from [<c05cddd0>] (lock_sock_nested+0x48/0x50) [<c05cddd0>] (lock_sock_nested) from [<c030eec8>] (af_alg_async_cb+0x20/0x80) [<c030eec8>] (af_alg_async_cb) from [<c0573b70>] (atmel_aes_transfer_complete+0x38/0x68) [<c0573b70>] (atmel_aes_transfer_complete) from [<c0121258>] (tasklet_action+0x68/0xb4) [<c0121258>] (tasklet_action) from [<c010158c>] (__do_softirq+0xc4/0x250) [<c010158c>] (__do_softirq) from [<c01215f0>] (irq_exit+0xfc/0x130) [<c01215f0>] (irq_exit) from [<c014a208>] (__handle_domain_irq+0x58/0xa8) [<c014a208>] (__handle_domain_irq) from [<c010b60c>] (__irq_svc+0x6c/0x90) [<c010b60c>] (__irq_svc) from [<c0310280>] (skcipher_recvmsg+0x2d8/0x318) [<c0310280>] (skcipher_recvmsg) from [<c05c8794>] (sock_read_iter+0x88/0xc8) [<c05c8794>] (sock_read_iter) from [<c01f1940>] (aio_read.constprop.3+0xcc/0x178) [<c01f1940>] (aio_read.constprop.3) from [<c01f2968>] (SyS_io_submit+0x540/0x644) [<c01f2968>] (SyS_io_submit) from [<c0107480>] (ret_fast_syscall+0x0/0x48) After bisecting, I determined that it appeared during the 4.14 merge window, with the following commit: e870456d8e7c crypto: algif_skcipher - overhaul memory management Best regards, -- Romain Izard
