This is a 5.11-ish kernel, with a lot of 5.12-ish iwlwifi backported, and lots of hacks
of my own...
Curious if anyone has seen similar problems or have suggestions to try?
I'll build a KASAN kernel and see if I can reproduce under that...
iwlwifi 0000:0c:00.0: Microcode SW error detected. Restarting 0x0.
iwlwifi 0000:0c:00.0: Start IWL Error Log Dump:
iwlwifi 0000:0c:00.0: Status: 0x00000040, count: 6
iwlwifi 0000:0c:00.0: Loaded firmware version: 62.49eeb572.0 ty-a0-gf-a0-62.ucode
iwlwifi 0000:0c:00.0: 0x00000942 | ADVANCED_SYSASSERT
iwlwifi 0000:0c:00.0: 0x000002F0 | trm_hw_status0
iwlwifi 0000:0c:00.0: 0x00000000 | trm_hw_status1
iwlwifi 0000:0c:00.0: 0x004DA02C | branchlink2
iwlwifi 0000:0c:00.0: 0x00001592 | interruptlink1
iwlwifi 0000:0c:00.0: 0x00001592 | interruptlink2
iwlwifi 0000:0c:00.0: 0x0004FFF5 | data1
iwlwifi 0000:0c:00.0: 0x2A010200 | data2
iwlwifi 0000:0c:00.0: 0x020C0606 | data3
iwlwifi 0000:0c:00.0: 0x098131BA | beacon time
iwlwifi 0000:0c:00.0: 0x9A39FE56 | tsf low
iwlwifi 0000:0c:00.0: 0x00000013 | tsf hi
iwlwifi 0000:0c:00.0: 0x00000000 | time gp1
iwlwifi 0000:0c:00.0: 0x06ADA48B | time gp2
iwlwifi 0000:0c:00.0: 0x00000001 | uCode revision type
iwlwifi 0000:0c:00.0: 0x0000003E | uCode version major
iwlwifi 0000:0c:00.0: 0x49EEB572 | uCode version minor
iwlwifi 0000:0c:00.0: 0x00000420 | hw version
iwlwifi 0000:0c:00.0: 0x00C89002 | board version
iwlwifi 0000:0c:00.0: 0x8062FD27 | hcmd
iwlwifi 0000:0c:00.0: 0x80121010 | isr0
iwlwifi 0000:0c:00.0: 0x00400000 | isr1
iwlwifi 0000:0c:00.0: 0x48F0000A | isr2
iwlwifi 0000:0c:00.0: 0x04C315DC | isr3
iwlwifi 0000:0c:00.0: 0x00200000 | isr4
iwlwifi 0000:0c:00.0: 0x02F3001C | last cmd Id
iwlwifi 0000:0c:00.0: 0x004D6718 | wait_event
iwlwifi 0000:0c:00.0: 0x00000024 | l2p_control
iwlwifi 0000:0c:00.0: 0x00000000 | l2p_duration
iwlwifi 0000:0c:00.0: 0x0000000F | l2p_mhvalid
iwlwifi 0000:0c:00.0: 0x08001888 | l2p_addr_match
iwlwifi 0000:0c:00.0: 0x00000009 | lmpm_pmg_sel
iwlwifi 0000:0c:00.0: 0x00000000 | timestamp
iwlwifi 0000:0c:00.0: 0x00000808 | flow_handler
iwlwifi 0000:0c:00.0: Start IWL Error Log Dump:
iwlwifi 0000:0c:00.0: Status: 0x00000040, count: 7
iwlwifi 0000:0c:00.0: 0x20000070 | NMI_INTERRUPT_LMAC_FATAL
iwlwifi 0000:0c:00.0: 0x00000000 | umac branchlink1
iwlwifi 0000:0c:00.0: 0x8045C7E4 | umac branchlink2
iwlwifi 0000:0c:00.0: 0x8047E400 | umac interruptlink1
iwlwifi 0000:0c:00.0: 0x8047E400 | umac interruptlink2
iwlwifi 0000:0c:00.0: 0x00000002 | umac data1
iwlwifi 0000:0c:00.0: 0x8047E400 | umac data2
iwlwifi 0000:0c:00.0: 0x00000000 | umac data3
iwlwifi 0000:0c:00.0: 0x0000003E | umac major
iwlwifi 0000:0c:00.0: 0x49EEB572 | umac minor
iwlwifi 0000:0c:00.0: 0x06ADA9BB | frame pointer
iwlwifi 0000:0c:00.0: 0xC0886264 | stack pointer
iwlwifi 0000:0c:00.0: 0x0043010C | last host cmd
iwlwifi 0000:0c:00.0: 0x00000000 | isr status reg
iwlwifi 0000:0c:00.0: IML/ROM dump:
iwlwifi 0000:0c:00.0: 0x00000B03 | IML/ROM error/state
iwlwifi 0000:0c:00.0: 0x00007EE9 | IML/ROM data1
iwlwifi 0000:0c:00.0: 0x00000080 | IML/ROM WFPM_AUTH_KEY_0
iwlwifi 0000:0c:00.0: Fseq Registers:
iwlwifi 0000:0c:00.0: 0x60000000 | FSEQ_ERROR_CODE
iwlwifi 0000:0c:00.0: 0x80440002 | FSEQ_TOP_INIT_VERSION
iwlwifi 0000:0c:00.0: 0x00070008 | FSEQ_CNVIO_INIT_VERSION
iwlwifi 0000:0c:00.0: 0x0000A652 | FSEQ_OTP_VERSION
iwlwifi 0000:0c:00.0: 0x00000002 | FSEQ_TOP_CONTENT_VERSION
iwlwifi 0000:0c:00.0: 0x4552414E | FSEQ_ALIVE_TOKEN
iwlwifi 0000:0c:00.0: 0x00400410 | FSEQ_CNVI_ID
iwlwifi 0000:0c:00.0: 0x00400410 | FSEQ_CNVR_ID
iwlwifi 0000:0c:00.0: 0x00400410 | CNVI_AUX_MISC_CHIP
iwlwifi 0000:0c:00.0: 0x00400410 | CNVR_AUX_MISC_CHIP
iwlwifi 0000:0c:00.0: 0x00009061 | CNVR_SCU_SD_REGS_SD_REG_DIG_DCDC_VTRIM
iwlwifi 0000:0c:00.0: 0x00000061 | CNVR_SCU_SD_REGS_SD_REG_ACTIVE_VDIG_MIRROR
BUG: kernel NULL pointer dereference, address: 0000000000000084
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 0 P4D 0
Oops: 0000 [#1] PREEMPT SMP
CPU: 6 PID: 1142 Comm: irq/236-iwlwifi Not tainted 5.11.10+ #29
Hardware name: Default string Default string/SKYBAY, BIOS 5.12 08/04/2020
RIP: 0010:rb_next+0x1d/0x50
Code: 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 8b 0f 48 39 cf 74 39 48 8b 47 08 48 85 c0 74 22 48 8b 50 10 48 85 d2 74 0c 48 89 d0 <48> 8b 50 10 48 85 d2 75 f4
c3 48 3b 79 08 75 17
RSP: 0018:ffffc9000021cde0 EFLAGS: 00010206
RAX: 0000000000000074 RBX: ffff88811d5388c0 RCX: ffff8881124ae200
RDX: 0000000000000074 RSI: ffff888117f0c600 RDI: ffff888117f0c600
RBP: 0000000000000000 R08: 000000000000df88 R09: 0000000000000023
R10: ffffc9000021cf28 R11: 00000000000065d0 R12: ffffffff8280aec0
R13: ffff888117f0c600 R14: ffff888157475600 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff88846dd80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000084 CR3: 000000000260f001 CR4: 00000000003706e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<IRQ>
tcp_enter_loss+0xbf/0x350
tcp_retransmit_timer+0x35a/0x970
? netif_receive_skb_list_internal+0x1a6/0x2a0
tcp_write_timer_handler+0x87/0x1d0
tcp_write_timer+0x91/0xd0
? tcp_write_timer_handler+0x1d0/0x1d0
? tcp_write_timer_handler+0x1d0/0x1d0
call_timer_fn+0x22/0x120
run_timer_softirq+0x1e2/0x410
? net_rx_action+0x224/0x2a0
__do_softirq+0xc6/0x2bb
? irq_finalize_oneshot.part.49+0xd0/0xd0
asm_call_irq_on_stack+0xf/0x20
</IRQ>
(gdb) l *(tcp_enter_loss+0xbf)
0xffffffff81a3862f is in tcp_enter_loss (/home2/greearb/git/linux-5.11.dev.y/net/ipv4/tcp_input.c:2081).
2076 } else if (tcp_is_reno(tp)) {
2077 tcp_reset_reno_sack(tp);
2078 }
2079
2080 skb = head;
2081 skb_rbtree_walk_from(skb) {
2082 if (is_reneg)
2083 TCP_SKB_CB(skb)->sacked &= ~TCPCB_SACKED_ACKED;
2084 else if (tcp_is_rack(sk) && skb != head &&
2085 tcp_rack_skb_timeout(tp, skb, 0) > 0)
(gdb)
(gdb) l *(rb_next+0x1d)
0xffffffff815d16bd is in rb_next (/home2/greearb/git/linux-5.11.dev.y/lib/rbtree.c:503).
498
499 /*
500 * If we have a right-hand child, go down and then left as far
501 * as we can.
502 */
503 if (node->rb_right) {
504 node = node->rb_right;
505 while (node->rb_left)
506 node = node->rb_left;
507 return (struct rb_node *)node;
(gdb)
Thanks,
Ben
--
Ben Greear <greearb@xxxxxxxxxxxxxxx>
Candela Technologies Inc http://www.candelatech.com
