Comment 9 for bug 1857074

v4.14.151 upstream fails as well - but with a different symptom (see below). v4.14.150 seems fine, so I'll try and bisect between the two. Of course, that's really just a shot in the dark, as we know this issue is finicky..

[ 34.896151] Unable to handle kernel paging request at virtual address 748214240b9fa200
[ 34.908263] Mem abort info:
[ 34.915217] Exception class = IABT (current EL), IL = 32 bits
[ 34.925365] SET = 0, FnV = 0
[ 34.932606] EA = 0, S1PTW = 0
[ 34.939877] [748214240b9fa200] address between user and kernel address ranges
[ 34.951247] Internal error: Oops: 86000004 [#1] SMP
[ 34.960370] Modules linked in: nls_iso8859_1 sch_fq_codel thunderx_edac thunderx_zip cavium_rng_vf cavium_rng gpio_keys shpchp uio_pdrv_genirq ipmi_ssif ipmi_devintf uio ipmi_msghandler ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c raid1 raid0 multipath linear nicvf nicpf ast i2c_algo_bit ttm drm_kms_helper aes_ce_blk syscopyarea sysfillrect aes_ce_cipher sysimgblt thunder_bgx crc32_ce fb_sys_fops crct10dif_ce ghash_ce drm sha2_ce sha256_arm64 sha1_ce ahci libahci i2c_thunderx thunder_xcv i2c_smbus mdio_thunder thunderx_mmc mdio_cavium aes_neon_bs aes_neon_blk crypto_simd cryptd aes_arm64
[ 35.060004] Process apparmor_parser (pid: 1188, stack limit = 0xffff00001b948000)
[ 35.071987] CPU: 16 PID: 1188 Comm: apparmor_parser Not tainted 4.14.151 #1
[ 35.083436] Hardware name: Cavium ThunderX CRB/To be filled by O.E.M., BIOS 5.11 12/12/2012
[ 35.096272] task: ffff801f68160f00 task.stack: ffff00001b948000
[ 35.106632] PC is at 0x748214240b9fa200
[ 35.114857] LR is at 0x748214240b9fa200
[ 35.122977] pc : [<748214240b9fa200>] lr : [<748214240b9fa200>] pstate: 20400145
[ 35.134654] sp : ffff00001b94bca0
[ 35.142170] x29: ffff801f713f2020 x28: 0000000000000040
[ 35.151657] x27: 0000000000000000 x26: ffff00001b94be00
[ 35.161073] x25: ffff801f713f2020 x24: ffff00001b94bdd8
[ 35.170410] x23: ffff801f713f1ea8 x22: ffff801f71bd8000
[ 35.179678] x21: 0000000000000000 x20: ffff0000082352bc
[ 35.185726] audit: type=1400 audit(1578951898.572:9): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine" pid=1185 comm="apparmor_parser"
[ 35.188933] x19: ffff00001b94bcb0 x18: 0000ffff8916aa70
[ 35.188938] x17: 0000000000000000 x16: 0000000000000000
[ 35.188941] x15: 0000000000000000 x14: 0000000000000000
[ 35.213254] audit: type=1400 audit(1578951898.572:10): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/snapd/snap-confine//mount-namespace-capture-helper" pid=1185 comm="apparmor_parser"
[ 35.222441] x13: 0000000000000000 x12: 0000000000000000
[ 35.222445] x11: 0000000000000000 x10: 0000000000000001
[ 35.222448] x9 : 0000000000000228 x8 : 0000000000000e4a
[ 35.281468] audit: type=1400 audit(1578951898.668:11): apparmor="STATUS" operation="profile_load" profile="unconfined" name="lxc-container-default" pid=1199 comm="apparmor_parser"
[ 35.285416] x7 : 0000000000000000 x6 : 000000000000000f
[ 35.285420] x5 : 00000000000010c0 x4 : 0000801f72a36000
[ 35.285424] x3 : ffff00001b94bbe0 x2 : 745014240b9fa200
[ 35.343627] x1 : 0000000000000000 x0 : 00000000000067a1
[ 35.352234] Call trace:
[ 35.357875] Exception stack(0xffff00001b94bb60 to 0xffff00001b94bca0)
[ 35.367508] bb60: 00000000000067a1 0000000000000000 745014240b9fa200 ffff00001b94bbe0
[ 35.378536] bb80: 0000801f72a36000 00000000000010c0 000000000000000f 0000000000000000
[ 35.389484] bba0: 0000000000000e4a 0000000000000228 0000000000000001 0000000000000000
[ 35.400385] bbc0: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
[ 35.411233] bbe0: 0000000000000000 0000000000000000 0000ffff8916aa70 ffff00001b94bcb0
[ 35.422060] bc00: ffff0000082352bc 0000000000000000 ffff801f71bd8000 ffff801f713f1ea8
[ 35.433212] bc20: ffff00001b94bdd8 ffff801f713f2020 ffff00001b94be00 0000000000000000
[ 35.444158] bc40: 0000000000000040 ffff801f713f2020 748214240b9fa200 ffff00001b94bca0
[ 35.455559] bc60: 748214240b9fa200 0000000020400145 ffff000008b02000 ffff801f68160f00
[ 35.466803] bc80: 0000ffffffffffff 00000e4a1b94bdd8 ffff801f713f2020 748214240b9fa200
[ 35.477595] [<748214240b9fa200>] 0x748214240b9fa200
[ 35.485363] Code: bad PC value
[ 35.491214] ---[ end trace e1671159f66f9f11 ]---