New: Bad swap file entry 740167b7, kernel NULL pointer dereference and Oops after hours of building

Bug 207325 Andrew Morton 1 participant 1 message Apr 17, 2020 1 message not in the archive Memory management

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Andrew Morton

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2020-04-17 19:57 UTC #1 lore raw

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Quoted 170 lines · On Fri, 17 Apr 2020 15:27:36 +0000 [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=207325

            Bug ID: 207325
           Summary: Bad swap file entry 740167b7, kernel NULL pointer
                    dereference and Oops after hours of building
           Product: Memory Management
           Version: 2.5
    Kernel Version: 5.7-rc1
          Hardware: IA-32
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Other
          Assignee: [email protected]
          Reporter: [email protected]
        Regression: No

Created attachment 288559
--> https://bugzilla.kernel.org/attachment.cgi?id=288559&action=edit
dmesg (kernel 5.7-rc1, Shuttle XPC FS51, Pentium 4)

[...]

Apr 17 12:10:05 hakla04 kernel: get_swap_device: Bad swap file entry 740167b7
Apr 17 12:10:05 hakla04 kernel: BUG: kernel NULL pointer dereference, address:
00000000
Apr 17 12:10:05 hakla04 kernel: #PF: supervisor read access in kernel mode
Apr 17 12:10:05 hakla04 kernel: #PF: error_code(0x0000) - not-present page
Apr 17 12:10:05 hakla04 kernel: *pde = 00000000 
Apr 17 12:10:05 hakla04 kernel: Oops: 0000 [#1] SMP
Apr 17 12:10:05 hakla04 kernel: CPU: 0 PID: 12912 Comm: cc1plus Not tainted
5.7.0-rc1-Pentium4 #1
Apr 17 12:10:05 hakla04 kernel: Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Apr 17 12:10:05 hakla04 kernel: EIP: do_swap_page+0x9d/0x42c
Apr 17 12:10:05 hakla04 kernel: Code: 8b 80 20 0d 00 00 83 48 24 01 8b 4b 10 89
f2 8b 45 e8 e8 e2 36 01 00 89 45 f0 85 c0 0f 85 ed 00 00 00 8b 45 e8 e8 60 57
01 00 <8b> 00 0f ba e0 0c 0f 83 a6 00 00 00 8b 45 e8 e8 0b 58 01 00 48 0f
Apr 17 12:10:05 hakla04 kernel: EAX: 00000000 EBX: c2d59f2c ECX: f63c41fc EDX:
00000002
Apr 17 12:10:05 hakla04 kernel: ESI: cf0c8f60 EDI: c2d59f64 EBP: c2d59f18 ESP:
c2d59ef8
Apr 17 12:10:05 hakla04 kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
EFLAGS: 00010246
Apr 17 12:10:05 hakla04 kernel: CR0: 80050033 CR2: 00000000 CR3: 2fbfc000 CR4:
000006d0
Apr 17 12:10:05 hakla04 kernel: Call Trace:
Apr 17 12:10:05 hakla04 kernel:  ? kmap_atomic_prot+0x2a/0x88
Apr 17 12:10:05 hakla04 kernel:  handle_mm_fault+0x282/0x81c
Apr 17 12:10:05 hakla04 kernel:  do_page_fault+0x350/0x435
Apr 17 12:10:05 hakla04 kernel:  ? vmalloc_sync_unmappings+0xa/0xa
Apr 17 12:10:05 hakla04 kernel:  common_exception_read_cr2+0x12d/0x132
Apr 17 12:10:05 hakla04 kernel: EIP: 0xb7bb7263
Apr 17 12:10:05 hakla04 kernel: Code: 84 37 06 00 00 85 c0 75 df 89 e8 c1 e8 04
8d 14 00 83 c2 10 01 d2 01 d2 03 54 24 10 8d 5a f8 8b 7a 04 39 fb 0f 84 b5 00
00 00 <8b> 47 0c 39 78 08 0f 85 a1 05 00 00 8d 0c 2f 83 49 04 01 89 42 04
Apr 17 12:10:05 hakla04 kernel: EAX: 00000010 EBX: b7cf87f8 ECX: 00000003 EDX:
b7cf8800
Apr 17 12:10:05 hakla04 kernel: ESI: b7cf8000 EDI: 0d9dd7a8 EBP: 00000100 ESP:
bfd08540
Apr 17 12:10:05 hakla04 kernel: DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
EFLAGS: 00010286
Apr 17 12:10:05 hakla04 kernel:  ? nmi+0xb4/0x114
Apr 17 12:10:05 hakla04 kernel: Modules linked in: auth_rpcgss nfsv4

dns_resolver nfs lockd grace sunrpc rt2500pci eeprom_93cx6 rt2x00pci rt2x00mmio rt2x00lib led_class mac80211 evdev firewire_ohci sr_mod firewire_core ohci_pci cdrom crc_itu_t cfg80211 thermal fan snd_intel8x0 snd_ac97_codec ohci_hcd ehci_pci ac97_bus ehci_hcd 8250 snd_pcm 8250_base rfkill usbcore libarc4 serial_core 8139too snd_timer sis_agp usb_common button mii agpgart snd i2c_sis96x soundcore zstd zram zsmalloc

Apr 17 12:10:05 hakla04 kernel: CR2: 0000000000000000
Apr 17 12:10:05 hakla04 kernel: ---[ end trace fac9f1455600dffb ]---
Apr 17 12:10:05 hakla04 kernel: EIP: do_swap_page+0x9d/0x42c
Apr 17 12:10:05 hakla04 kernel: Code: 8b 80 20 0d 00 00 83 48 24 01 8b 4b 10 89
f2 8b 45 e8 e8 e2 36 01 00 89 45 f0 85 c0 0f 85 ed 00 00 00 8b 45 e8 e8 60 57
01 00 <8b> 00 0f ba e0 0c 0f 83 a6 00 00 00 8b 45 e8 e8 0b 58 01 00 48 0f
Apr 17 12:10:05 hakla04 kernel: EAX: 00000000 EBX: c2d59f2c ECX: f63c41fc EDX:
00000002
Apr 17 12:10:05 hakla04 kernel: ESI: cf0c8f60 EDI: c2d59f64 EBP: c2d59f18 ESP:
c2d59ef8
Apr 17 12:10:05 hakla04 kernel: DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068
EFLAGS: 00010246
Apr 17 12:10:05 hakla04 kernel: CR0: 80050033 CR2: 00000000 CR3: 2fbfc000 CR4:
000006d0
Apr 17 12:10:05 hakla04 kernel: swap_info_get: Bad swap file entry 74016721
Apr 17 12:10:05 hakla04 kernel: BUG: Bad page map in process cc1plus 
pte:02ce423e pmd:7bd55067
Apr 17 12:10:05 hakla04 kernel: addr:0b365000 vm_flags:00100073
anon_vma:d8333e70 mapping:00000000 index:b365
Apr 17 12:10:05 hakla04 kernel: file:(null) fault:0x0 mmap:0x0 readpage:0x0
Apr 17 12:10:05 hakla04 kernel: CPU: 0 PID: 12912 Comm: cc1plus Tainted: G     
D           5.7.0-rc1-Pentium4 #1
Apr 17 12:10:05 hakla04 kernel: Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Apr 17 12:10:05 hakla04 kernel: Call Trace:
Apr 17 12:10:05 hakla04 kernel:  dump_stack+0x6c/0x94
Apr 17 12:10:05 hakla04 kernel:  print_bad_pte+0x14d/0x167
Apr 17 12:10:05 hakla04 kernel:  unmap_page_range+0x2b9/0x3cb
Apr 17 12:10:05 hakla04 kernel:  unmap_single_vma+0x8a/0x94
Apr 17 12:10:05 hakla04 kernel:  unmap_vmas+0x52/0x69
Apr 17 12:10:05 hakla04 kernel:  exit_mmap+0x93/0xde
Apr 17 12:10:05 hakla04 kernel:  ? do_exit+0x2ad/0x82d
Apr 17 12:10:05 hakla04 kernel:  __mmput+0x39/0xc6
Apr 17 12:10:05 hakla04 kernel:  mmput+0x1e/0x21
Apr 17 12:10:05 hakla04 kernel:  do_exit+0x2fd/0x82d
Apr 17 12:10:05 hakla04 kernel:  rewind_stack_do_exit+0x11/0x13
Apr 17 12:10:05 hakla04 kernel: EIP: 0xb7bb7263
Apr 17 12:10:05 hakla04 kernel: Code: 84 37 06 00 00 85 c0 75 df 89 e8 c1 e8 04
8d 14 00 83 c2 10 01 d2 01 d2 03 54 24 10 8d 5a f8 8b 7a 04 39 fb 0f 84 b5 00
00 00 <8b> 47 0c 39 78 08 0f 85 a1 05 00 00 8d 0c 2f 83 49 04 01 89 42 04
Apr 17 12:10:05 hakla04 kernel: EAX: 00000010 EBX: b7cf87f8 ECX: 00000003 EDX:
b7cf8800
Apr 17 12:10:05 hakla04 kernel: ESI: b7cf8000 EDI: 0d9dd7a8 EBP: 00000100 ESP:
bfd08540
Apr 17 12:10:05 hakla04 kernel: DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 007b
EFLAGS: 00010286
Apr 17 12:10:05 hakla04 kernel:  ? nmi+0xb4/0x114
Apr 17 12:10:05 hakla04 kernel: swap_info_get: Bad swap file entry 74016722
Apr 17 12:10:05 hakla04 kernel: BUG: Bad page map in process cc1plus 
pte:02ce443e pmd:7bd55067
Apr 17 12:10:05 hakla04 kernel: addr:0b366000 vm_flags:00100073
anon_vma:d8333e70 mapping:00000000 index:b366
Apr 17 12:10:05 hakla04 kernel: file:(null) fault:0x0 mmap:0x0 readpage:0x0
Apr 17 12:10:05 hakla04 kernel: CPU: 0 PID: 12912 Comm: cc1plus Tainted: G    B
D           5.7.0-rc1-Pentium4 #1
Apr 17 12:10:05 hakla04 kernel: Hardware name:  /FS51, BIOS 6.00 PG 12/02/2003
Apr 17 12:10:05 hakla04 kernel: Call Trace:
Apr 17 12:10:05 hakla04 kernel:  dump_stack+0x6c/0x94
Apr 17 12:10:05 hakla04 kernel:  print_bad_pte+0x14d/0x167
Apr 17 12:10:05 hakla04 kernel:  unmap_page_range+0x2b9/0x3cb
Apr 17 12:10:05 hakla04 kernel:  unmap_single_vma+0x8a/0x94
Apr 17 12:10:05 hakla04 kernel:  unmap_vmas+0x52/0x69
Apr 17 12:10:05 hakla04 kernel:  exit_mmap+0x93/0xde
Apr 17 12:10:05 hakla04 kernel:  ? do_exit+0x2ad/0x82d
Apr 17 12:10:05 hakla04 kernel:  __mmput+0x39/0xc6
Apr 17 12:10:05 hakla04 kernel:  mmput+0x1e/0x21
Apr 17 12:10:05 hakla04 kernel:  do_exit+0x2fd/0x82d
Apr 17 12:10:05 hakla04 kernel:  rewind_stack_do_exit+0x11/0x13

[...]
Please find the full dmesg (journalctl -k) attached, it is rather long. The bug leaves the machine in a working state via ssh. Swap usage looks rather unobtrusive. /dev/zram0 is generated via /sbin/zram-init -d0 -s2 -azstd -Lzram_swap 256.

 # cat /proc/swaps 
Filename                Type            Size    Used    Priority
/dev/zram0              partition       262140  3328    16383
/dev/sda3               partition       16777212        0       -2

 # inxi -b
System:    Host: hakla04 Kernel: 5.7.0-rc1-Pentium4 i686 bits: 32 Console: tty
1 
           Distro: Gentoo Base System release 2.6 
Machine:   Type: Desktop Mobo: Shuttle model: FS51 serial: N/A BIOS: Phoenix v:
6.00 PG 
           date: 12/02/2003 
CPU:       Single Core: Intel Pentium 4 type: MCP speed: 2796 MHz 
Graphics:  Device-1: AMD RV350 [Radeon 9550/9600/X1050 Series] driver: N/A 
           Display: server: X.org 1.20.7 driver: radeon tty: 104x53 
           Message: Advanced graphics data unavailable in console for root. 
Network:   Device-1: Ralink RT2500 Wireless 802.11bg driver: rt2500pci 
           Device-2: Realtek RTL-8100/8101L/8139 PCI Fast Ethernet Adapter
driver: 8139too 
Drives:    Local Storage: total: 76.69 GiB used: 7.30 GiB (9.5%) 
Info:      Processes: 92 Uptime: 14h 38m Memory: 1.97 GiB used: 146.3 MiB
(7.3%) Init: systemd 
           Shell: bash inxi: 3.0.38

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