linux-kernel - [next-20220225] powerpc boot broken with maple tree code ?

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Date:   Wed, 2 Mar 2022 11:49:14 +0530
From:   Abdul Haleem <abdhalee@...ux.vnet.ibm.com>
To:     linux-next <linux-next@...r.kernel.org>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        maple-tree@...ts.infradead.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        liam.howlett@...cle.com, hca@...ux.ibm.com, linux-mm@...ck.org,
        sachinp <sachinp@...ux.vnet.ibm.com>,
        Stephen Rothwell <sfr@...b.auug.org.au>,
        Michael Ellerman <mpe@...erman.id.au>,
        Brian King <brking@...ux.vnet.ibm.com>,
        "aneesh.kumar" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [next-20220225] powerpc boot broken with maple tree code ?

Greeting's

linux-next kernel 5.17.0-rc5-next-20220225 boot is broken on powerpc

Is this due to Introduction of maple patch series ?

Kernel attempted to read user page (0) - exploit attempt? (uid: 0)
  BUG: Kernel NULL pointer dereference on read at 0x00000000
  Faulting instruction address: 0xc0000000006f1560
  Oops: Kernel access of bad area, sig: 11 [#1]
  LE PAGE_SIZE=64K MMU=Radix SMP NR_CPUS=2048 NUMA pSeries
  Modules linked in: nfnetlink tcp_diag udp_diag inet_diag unix_diag af_packet_diag ibmvnic netlink_diag bonding rfkill sunrpc pseries_rng xts vmx_crypto gf128mul sch_fq_codel binfmt_misc ip_tables ext4 mbcache jbd2 dm_service_time sd_mod t10_pi sg ibmvfc scsi_transport_fc ibmveth dm_multipath dm_mirror dm_region_hash dm_log dm_mod fuse [last unloaded: ibmvnic]
  CPU: 31 PID: 7527 Comm: pmpost Not tainted 5.17.0-rc5-next-20220225-autotest #1
  NIP:  c0000000006f1560 LR: c0000000006f6f48 CTR: 0000000000000000
  REGS: c0000000251732f0 TRAP: 0300   Not tainted  (5.17.0-rc5-next-20220225-autotest)
  MSR:  8000000000009033 <SF,EE,ME,IR,DR,RI,LE>  CR: 24422888  XER: 20040000
  CFAR: c0000000006f17a4 DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0
  GPR00: c0000000006feb04 c000000025173590 c0000000028d1400 c0000000251735b8
  GPR04: 0000000000000001 c000000028364200 c0000000251735b8 0000000000000000
  GPR08: 0000000000000004 0000000000000002 0000000000000000 c000000028364200
  GPR12: 0000000044422888 c0000013ffaa4e80 0000000000000003 c0000000355eef48
  GPR16: 00007ffff23ee710 00000000003a164c 0000000000000002 0000000000000001
  GPR20: 0000000000000000 0000000000000073 000000007fff8a79 0000000000000000
  GPR24: c000000018aade00 00007fff8a79ffff c000000025173680 0000000000000002
  GPR28: c000000000d448e8 0000000000000002 0000000000000001 c0000000251736c0
  NIP [c0000000006f1560] mas_ascend+0x60/0x2e0
  LR [c0000000006f6f48] mas_next_sibling+0xd8/0x290
  Call Trace:
  [c000000025173590] [c000000025173b18] 0xc000000025173b18 (unreliable)
  [c000000025173620] [c0000000006feb04] mas_wr_modify+0x6c4/0x910
  [c0000000251739a0] [c0000000006ff0b8] mas_wr_store_entry+0x198/0x3f0
  [c0000000251739d0] [c00000000070167c] mas_store_gfp+0x6c/0x190
  [c000000025173a80] [c0000000003b1164] mmap_region+0x304/0xda0
  [c000000025173bf0] [c0000000003b1fcc] do_mmap+0x3cc/0x5e0
  [c000000025173c90] [c000000000372ea0] vm_mmap_pgoff+0x130/0x1f0
  [c000000025173d20] [c0000000003adc8c] ksys_mmap_pgoff+0x6c/0x2c0
  [c000000025173d90] [c000000000013780] sys_mmap+0x40/0xb0
  [c000000025173db0] [c00000000002f7e8] system_call_exception+0x178/0x380
  [c000000025173e10] [c00000000000c64c] system_call_common+0xec/0x250
  --- interrupt: c00 at 0x7fff8a7678b8
  NIP:  00007fff8a7678b8 LR: 00007fff8a749e84 CTR: 0000000000000000
  REGS: c000000025173e80 TRAP: 0c00   Not tainted  (5.17.0-rc5-next-20220225-autotest)
  MSR:  800000000280f033 <SF,VEC,VSX,EE,PR,FP,ME,IR,DR,RI,LE>  CR: 24422284  XER: 00000000
  IRQMASK: 0
  GPR00: 000000000000005a 00007ffff23ee680 00007fff8a797e00 00007fff8a790000
  GPR04: 0000000000000008 0000000000000003 0000000000000032 ffffffffffffffff
  GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
  GPR12: 0000000000000000 0000000000000000 0000000000000003 00007ffff23ee740
  GPR16: 00007ffff23ee710 00000000003a164c 0000000000000002 0000000000000006
  GPR20: 0000000000000000 00007fff8a790000 00007fff8a5fa1eb 00007fff8a793d70
  GPR24: 00007fff8a791178 0000000000000000 0000000000000003 00007ffff23eea40
  GPR28: 0000000000000000 000000000000fd04 00007fff8a793d90 00007ffff23ee7d0
  NIP [00007fff8a7678b8] 0x7fff8a7678b8
  LR [00007fff8a749e84] 0x7fff8a749e84
  --- interrupt: c00
  Instruction dump:
  712a0002 e8a30000 552a067a 41820264 71290086 2ba90006 419e01a8 39200003
  7d4a4c36 61080004 99460039 f9060018 <e9270000> 792a07e0 2eaa0000 7d4c5378
  ---[ end trace 0000000000000000 ]---
  
  Kernel panic - not syncing: Fatal exception

kernel config attached

-- 
Regard's

Abdul Haleem
IBM Linux Technology Center

View attachment "ZZ-VM-config.txt" of type "text/plain" (147144 bytes)