Re: panic: malloc(M_WAITOK) with sleeping prohibited

On Wed, Mar 10, 2021 at 01:33:34PM +0100, Hans Petter Selasky wrote:
> On 3/10/21 12:41 PM, Peter Holm wrote:
> > On Wed, Mar 10, 2021 at 10:52:53AM +0100, Hans Petter Selasky wrote:
> >> On 3/10/21 10:15 AM, Peter Holm wrote:
> >>> I just got this panic:
> >>>
> >>> igb0: <Intel(R) PRO/1000 PCI-Express Network Driver> port 0xd020-0xd03f mem 0xfb320000-0xfb33ffff,0xfb344000-0xfb347fff irq 16 at device 0.0 on pci8
> >>> igb0: Using 1024 TX descriptors and 1024 RX descriptors
> >>> igb0: queue equality override not set, capping rx_queues at 6 and tx_queues at 6
> >>> igb0: Using 6 RX queues 6 TX queues
> >>> igb0: Using MSI-X interrupts with 7 vectors
> >>> igb0:
> >>> db>
> >>> db> show panic
> >>> panic: malloc(M_WAITOK) with sleeping prohibited
> >>> db> bt
> >>> Tracing pid 12 tid 100172 td 0xfffffe010dce2100
> >>> kdb_enter() at kdb_enter+0x37/frame 0xfffffe00e4f72980
> >>> vpanic() at vpanic+0x1b2/frame 0xfffffe00e4f729d0
> >>> panic() at panic+0x43/frame 0xfffffe00e4f72a30
> >>> malloc_dbg() at malloc_dbg+0xd4/frame 0xfffffe00e4f72a50
> >>> malloc() at malloc+0x34/frame 0xfffffe00e4f72ab0
> >>> linux_alloc_current() at linux_alloc_current+0x3d/frame 0xfffffe00e4f72b00
> >>> linux_irq_handler() at linux_irq_handler+0x3a/frame 0xfffffe00e4f72b20
> >>> ithread_loop() at ithread_loop+0x279/frame 0xfffffe00e4f72bb0
> >>> fork_exit() at fork_exit+0x80/frame 0xfffffe00e4f72bf0
> >>> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e4f72bf0
> >>> --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
> >>> db> x/s version
> >>> version:        FreeBSD 14.0-CURRENT #0 main-n245371-ce53f92e6c81: Wed Mar 10 10:00:29 CET 2021\012    pho_at_mercat1.netperf.freebsd.org:/usr/src/sys/amd64/compile/PHO\012
> >>> db>
> >>
> >> This should fix it:
> >> https://cgit.freebsd.org/src/commit/?id=d1cbe79089868226625c12ef49f51214d79aa427
> >>
> >> --HPS
> > 
> > Yes, thank you. Now I see this:
> > 
> > ugen0.3: <vendor 0x0557 product 0x2419> at usbus0
> > ukbd0 on uhub3
> > ukbd0: <vendor 0x0557 product 0x2419, class 0/0, rev 1.10/1.00, addr 2> on usbus0
> > kbd2 at ukbd0
> > panic: malloc(M_WAITOK) with sleeping prohibited
> > cpuid = 0
> > time = 1615375651
> > KDB: stack backtrace:
> > db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00e4974890
> > vpanic() at vpanic+0x181/frame 0xfffffe00e49748e0
> > panic() at panic+0x43/frame 0xfffffe00e4974940
> > malloc_dbg() at malloc_dbg+0xd4/frame 0xfffffe00e4974960
> > malloc() at malloc+0x34/frame 0xfffffe00e49749c0
> > linux_alloc_current() at linux_alloc_current+0x3d/frame 0xfffffe00e4974a10
> > linux_timer_callback_wrapper() at linux_timer_callback_wrapper+0x37/frame 0xfffffe00e4974a30
> > softclock_call_cc() at softclock_call_cc+0x15d/frame 0xfffffe00e4974b00
> > softclock() at softclock+0x66/frame 0xfffffe00e4974b20
> > ithread_loop() at ithread_loop+0x279/frame 0xfffffe00e4974bb0
> > fork_exit() at fork_exit+0x80/frame 0xfffffe00e4974bf0
> > fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe00e4974bf0
> > --- trap 0, rip = 0, rsp = 0, rbp = 0 ---
> > KDB: enter: panic
> > [ thread pid 12 tid 100088 ]
> 
> Try this:
> https://cgit.freebsd.org/src/commit/?id=dfb33cb0ef48084da84072244e8ca486dfcf3a96
> 

Works for me. Thank you!

- Peter

> There will be a more comprehensive fix coming:
> https://reviews.freebsd.org/D29183
> 
> --HPS