On Mon, Nov 06, 2017 at 03:56:54PM -0500, valdis.kletni...@vt.edu wrote: > I've hit this 6 times now, across 3 boots: > > Nov 3 11:04:54 turing-police kernel: [ 547.814748] BUG: sleeping function > called from invalid context at mm/slab.h:422 > > Nov 3 20:24:11 turing-police kernel: [ 60.093793] BUG: sleeping function > called from invalid context at mm/slab.h:422 > Nov 4 20:20:54 turing-police kernel: [86264.366955] BUG: sleeping function > called from invalid context at mm/slab.h:422 > Nov 5 19:17:40 turing-police kernel: [172469.769179] BUG: sleeping function > called from invalid context at mm/slab.h:422 > Nov 6 06:07:37 turing-police kernel: [211467.239460] BUG: sleeping function > called from invalid context at mm/slab.h:422 > > Nov 6 14:12:43 turing-police kernel: [ 54.891848] BUG: sleeping function > called from invalid context at mm/slab.h:422 > > Something seems to be going astray while handling a RA packet. > > Kernel dirty due to hand-patching https://patchwork.kernel.org/patch/10003555/ > (signed int:1 bitfield in sched.h causing tons of warnings) > > Unfortunately, the previous next- kernel I built was -20170927 (which worked > OK). > > Googling for things in the traceback in the last month comes up empty, and > only > thing in the git log for net/ipv6 that looks vaguely related: > > commit f3d9832e56c48e4ca50bab0457e21bcaade4536d > Author: David Ahern <dsah...@gmail.com> > Date: Wed Oct 18 09:56:52 2017 -0700 > > ipv6: addrconf: cleanup locking in ipv6_add_addr
Probably right... [...] > [ 54.891848] BUG: sleeping function called from invalid context at > mm/slab.h:422 > [ 54.891855] in_atomic(): 1, irqs_disabled(): 0, pid: 0, name: swapper/0 > [ 54.891859] INFO: lockdep is turned off. > [ 54.891867] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W OE > 4.14.0-rc7-next-20171102-dirty #537 > [ 54.891872] Hardware name: Dell Inc. Latitude E6530/07Y85M, BIOS A20 > 05/08/2017 > [ 54.891877] Call Trace: > [ 54.891882] <IRQ> > [ 54.891894] dump_stack+0x7b/0xe4 > [ 54.891907] ___might_sleep+0x1b0/0x300 > [ 54.891921] kmem_cache_alloc_trace+0x2c7/0x500 > [ 54.891931] ? cyc2ns_read_end+0x1e/0x30 > [ 54.891944] ipv6_add_addr+0x15a/0xc30 > [ 54.891977] ? ipv6_create_tempaddr+0x2ea/0x5d0 > [ 54.891986] ipv6_create_tempaddr+0x2ea/0x5d0 This function is called from softirq so we should call ipv6_add_addr() with 'can_block' set to 'false'. DavidA, it's already late here so you can probably fix this before I take a closer look tomorrow morning. :) Thanks > [ 54.892007] ? manage_tempaddrs+0x195/0x220 > [ 54.892023] ? addrconf_prefix_rcv_add_addr+0x1c0/0x4f0 > [ 54.892032] addrconf_prefix_rcv_add_addr+0x1c0/0x4f0 > [ 54.892052] addrconf_prefix_rcv+0x2e5/0x9b0 > [ 54.892068] ? neigh_update+0x446/0xb90 > [ 54.892098] ? ndisc_router_discovery+0x5ab/0xf00 > [ 54.892107] ndisc_router_discovery+0x5ab/0xf00 > [ 54.892120] ? retint_kernel+0x2d/0x2d > [ 54.892152] ndisc_rcv+0x1b6/0x270 > [ 54.892167] icmpv6_rcv+0x6aa/0x9f0 > [ 54.892175] ? ipv6_chk_mcast_addr+0x176/0x530 > [ 54.892183] ? do_csum+0x17b/0x260 > [ 54.892197] ip6_input_finish+0x194/0xb20 > [ 54.892216] ip6_input+0x5b/0x2c0 > [ 54.892228] ? ip6_rcv_finish+0x320/0x320 > [ 54.892244] ip6_mc_input+0x15a/0x250 > [ 54.892252] ipv6_rcv+0x772/0x1050 > [ 54.892261] ? consume_skb+0xbe/0x2d0 > [ 54.892275] ? ip6_make_skb+0x2a0/0x2a0 > [ 54.892283] ? ip6_input+0x2c0/0x2c0 > [ 54.892298] __netif_receive_skb_core+0xa0f/0x1600 > [ 54.892316] ? process_backlog+0xac/0x400 > [ 54.892323] process_backlog+0xfa/0x400 > [ 54.892334] ? net_rx_action+0x145/0x1130 > [ 54.892348] net_rx_action+0x310/0x1130 > [ 54.892407] ? RTUSBBulkReceive+0x11d/0x190 [mt7610u_sta] > [ 54.892430] __do_softirq+0x140/0xaba > [ 54.892455] irq_exit+0x10b/0x160 > [ 54.892464] do_IRQ+0xbb/0x1b0 > [ 54.892476] common_interrupt+0x93/0x93 > [ 54.892481] </IRQ> > [ 54.892490] RIP: 0010:cpuidle_enter_state+0xe6/0x5f0 > [ 54.892496] RSP: 0018:ffffffff9ca03e60 EFLAGS: 00000282 ORIG_RAX: > ffffffffffffffda > [ 54.892508] RAX: 000000000011b081 RBX: ffffc01bff617430 RCX: > 0000000000000000 > [ 54.892515] RDX: 0000000000000000 RSI: 0000000000000001 RDI: > ffffffff9ca2e580 > [ 54.892521] RBP: 0000000cbf23c844 R08: 0000000000000b84 R09: > 0000000000000000 > [ 54.892528] R10: 0000000000000000 R11: 0000000000000000 R12: > 0000000000000005 > [ 54.892534] R13: 0000000cbf23c844 R14: 0000000000000000 R15: > 0000000cbf0f0e82 > [ 54.892574] do_idle+0x191/0x3a0 > [ 54.892587] cpu_startup_entry+0x7b/0x90 > [ 54.892599] start_kernel+0x80b/0x841 > [ 54.892613] secondary_startup_64+0xa5/0xb0
