On 24/04/24 12:54, Chris Packham wrote: > Hi Jeff, Chuck, Greg, > > After updating one of our builds along the 5.15.y LTS branch our > testing caught a new kernel bug. Output below. > > I haven't dug into it yet but wondered if it rang any bells. A bit more info. This is happening at "reboot" for us. Our embedded devices use a bit of a hacked up reboot process so that they come back faster in the case of a failure. It doesn't happen with a proper `systemctl reboot` or with a SYSRQ+B I can trigger it with `killall -9 nfsd` which I'm not sure is a completely legit thing to do to kernel threads but it's probably close to what our customized reboot does. > > Thanks, > Chris > > [ 91.605109] ------------[ cut here ]------------ > [ 91.605122] kernel BUG at net/sunrpc/svc.c:570! > [ 91.605129] Internal error: Oops - BUG: 00000000f2000800 [#1] > PREEMPT SMP > [ 91.610643] Modules linked in: mvcpss(O) platform_driver(O) > ipifwd(O) xt_l2tp xt_hashlimit xt_conntrack xt_addrtype xt_LOG > xt_CHECKSUM wp512 vxlan veth twofish_generic twofish_common sr9800 > smsc95xx smsc75xx smsc sm3_generic sha512_arm64 sha3_generic > serpent_generic rtl8150 rpcsec_gss_krb5 rmd160 poly1305_generic plusb > pegasus optee_rng nbd microchip md4 md_mod mcs7830 lrw libpoly1305 > lan78xx l2tp_ip6 l2tp_ip l2tp_eth l2tp_netlink l2tp_core udp_tunnel > ipt_REJECT nf_reject_ipv4 ip6table_nat ip6table_mangle ip6table_filter > ip6t_ipv6header ip6t_REJECT ip6_udp_tunnel ip6_tables dm9601 dm_zero > dm_mirror dm_region_hash dm_log dm_mod diag tipc cuse cts > cpufreq_powersave cpufreq_conservative chacha_generic chacha20poly1305 > chacha_neon libchacha cast6_generic cast5_generic cast_common > camellia_generic blowfish_generic blowfish_common auth_rpcgss > oid_registry at25 arm_smccc_trng aes_neon_blk idprom_mtd(O) > idprom_i2c(O) epi3_boardinfo_i2c(O) x250(O) psuslot_epi3_register(O) > psuslot_gpio_group(O) > [ 91.610809] psuslot(O) > [ 91.611822] watchdog: watchdog1: watchdog did not stop! > [ 91.697065] gpiopins_boardinfo(O) idprom(O) epi3_boardinfo(O) > boardinfo(O) i2c_gpio i2c_algo_bit i2c_mv64xxx pluggable(O) > led_enable(O) omap_rng rng_core atl_reset(O) sbsa_gwdt uio_pdrv_genirq > [ 91.697096] CPU: 2 PID: 1770 Comm: nfsd Kdump: loaded Tainted: > G O 5.15.155 #1 > [ 91.697103] Hardware name: Allied Telesis x250-28XTm (DT) > [ 91.697107] pstate: 80000005 (Nzcv daif -PAN -UAO -TCO -DIT -SSBS > BTYPE=--) > [ 91.697112] pc : svc_destroy+0x84/0xac > [ 91.701202] watchdog: watchdog0: watchdog did not stop! > [ 91.702215] lr : svc_destroy+0x2c/0xac > [ 91.702220] sp : ffff80000bb3bde0 > [ 91.702223] x29: ffff80000bb3bde0 x28: 0000000000000000 x27: > 0000000000000000 > [ 91.746095] x26: 0000000000000000 x25: ffff00000dbfaa40 x24: > ffff000016c14000 > [ 91.746101] x23: ffff800008395c00 x22: ffff00000ee9f284 x21: > ffff00000eea9e10 > [ 91.746108] x20: ffff00000eea9e00 x19: ffff00000eea9e14 x18: > ffff800008e99000 > [ 91.769526] x17: 0000000000000006 x16: 0000000000000000 x15: > 0000000000000001 > [ 91.776782] x14: 00000000fffffffd x13: fffffc0000000000 x12: > ffff800076bc2000 > [ 91.784031] x11: ffff00007fba5c10 x10: ffff800076bc2000 x9 : > ffff8000092207c0 > [ 91.784038] x8 : fffffc000055eb08 x7 : ffff00000ef6c4c0 x6 : > fffffc0001f872c8 > [ 91.795823] x5 : 0000000000000100 x4 : ffff00007fbaeda8 x3 : > 0000000000000000 > [ 91.801684] x2 : 0000000000000000 x1 : ffff00000d8f8018 x0 : > ffff00000eea9e30 > [ 91.807545] Call trace: > [ 91.810088] svc_destroy+0x84/0xac > [ 91.813586] svc_exit_thread+0x108/0x15c > [ 91.816998] nfsd+0x178/0x1a0 > [ 91.818673] kthread+0x150/0x160 > [ 91.820610] ret_from_fork+0x10/0x20 > [ 91.820620] Code: a94153f3 a8c27bfd d50323bf d65f03c0 (d4210000) > [ 91.820629] SMP: stopping secondary CPUs > [ 91.830433] Starting crashdump kernel... > [ 91.833064] Bye!
