On Wed, 3 Apr 2019 at 03:14, syzbot <syzbot+51471b4aae195285a4a3@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > syzbot has bisected this bug to: > > commit 97cdcf37b57e3f204be3000b9eab9686f38b4356 > Author: Florian Westphal <fw@xxxxxxxxx> > Date: Mon Apr 1 14:42:13 2019 +0000 > > net: place xmit recursion in softnet data I am seeing this as well on ARMv7 board booted from NFS root (exynos_defconfig): [ 30.221238] BUG: using __this_cpu_read() in preemptible [00000000] code: systemd-network/236 [ 30.228576] caller is ip6_output+0x68/0x3e8 [ 30.232578] CPU: 1 PID: 236 Comm: systemd-network Not tainted 5.1.0-rc3-next-20190405 #2 [ 30.240657] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 30.246719] [<c011238c>] (unwind_backtrace) from [<c010df50>] (show_stack+0x10/0x14) [ 30.254447] [<c010df50>] (show_stack) from [<c0a87270>] (dump_stack+0x98/0xc4) [ 30.261638] [<c0a87270>] (dump_stack) from [<c0494a94>] (__this_cpu_preempt_check+0x124/0x128) [ 30.270238] [<c0494a94>] (__this_cpu_preempt_check) from [<c08e486c>] (ip6_output+0x68/0x3e8) [ 30.278730] [<c08e486c>] (ip6_output) from [<c08e52ac>] (ip6_send_skb+0x30/0x1d0) [ 30.286180] [<c08e52ac>] (ip6_send_skb) from [<c0912798>] (rawv6_sendmsg+0x824/0x9c0) [ 30.294005] [<c0912798>] (rawv6_sendmsg) from [<c07d8ff8>] (sock_sendmsg+0x14/0x24) [ 30.301628] [<c07d8ff8>] (sock_sendmsg) from [<c07d97cc>] (___sys_sendmsg+0x230/0x244) [ 30.309514] [<c07d97cc>] (___sys_sendmsg) from [<c07da9f8>] (__sys_sendmsg+0x50/0x8c) [ 30.317316] [<c07da9f8>] (__sys_sendmsg) from [<c01011ac>] (__sys_trace_return+0x0/0x14) [ 30.325376] Exception stack(0xe79f9fa8 to 0xe79f9ff0) [ 30.330377] 9fa0: 00000000 b6f3da58 0000000b beeb2a6c 00000000 00000000 [ 30.338560] 9fc0: 00000000 b6f3da58 004015ce 00000128 004b10c8 00000000 020d28f9 00000000 [ 30.346708] 9fe0: 004aeee0 beeb2a40 0047cbdc b6d27684 Full log: https://krzk.eu/#/builders/22/builds/1055/steps/13/logs/serial0 Best regards, Krzysztof Kozlowski
