Re: WARNING: at mm/gup.c:1101 __get_user_pages in 6.4.3

[Wei Shuyu]

I can trigger this reliably by visiting chrome://crash/


[  444.608793] ------------[ cut here ]------------
[  444.608795] WARNING: CPU: 7 PID: 901 at mm/gup.c:1101 
__get_user_pages+0x4c2/0x5b0
[  444.608800] Modules linked in: nvidia_drm(PO) nvidia_modeset(PO) 
nvidia(PO) nls_ascii nls_cp437 intel_rapl_msr vfat intel_rapl_common fat 
iosf_mbi kvm_amd uvcvideo kvm snd_hda_codec_realtek 
snd_hda_codec_generic irqbypass videobuf2_vmalloc ledtrig_audio 
snd_hda_codec_hdmi videobuf2_memops crc32_pclmul uvc videobuf2_v4l2 
snd_usb_audio pl2303 snd_hda_intel video snd_hwdep usbserial videodev 
snd_intel_dspcfg drm_kms_helper snd_hda_codec snd_usbmidi_lib 
aesni_intel snd_rawmidi snd_hda_core syscopyarea videobuf2_common 
snd_seq_device sysfillrect libaes sysimgblt input_leds snd_pcm 
crypto_simd mc led_class corsair_psu joydev cryptd snd_timer drm snd 
asus_ec_sensors evdev drm_panel_orientation_quirks rapl soundcore 
sp5100_tco pcspkr watchdog tiny_power_button wmi button loop fuse 
efi_pstore pstore efivarfs dmi_sysfs ip_tables x_tables autofs4 ext4 
crc32c_generic crc16 mbcache jbd2 hid_generic usbhid hid sd_mod ahci 
libahci xhci_pci libata xhci_hcd crc32c_intel i2c_piix4 scsi_mod nvme 
usbcore igb scsi_common usb_common
[  444.608829]  i2c_algo_bit nvme_core
[  444.608831] CPU: 7 PID: 901 Comm: chrome_crashpad Tainted: P          
 O       6.4.3 #1
[  444.608833] Hardware name: ASUS System Product Name/Pro WS X570-ACE, 
BIOS 4101 03/02/2022
[  444.608834] RIP: 0010:__get_user_pages+0x4c2/0x5b0
[  444.608836] Code: 00 00 48 8d 04 d0 e9 61 fc ff ff 48 8b 43 38 f0 48 
83 28 01 0f 85 f5 fd ff ff 48 8b 43 38 48 8d 7b 30 ff 50 08 e9 e5 fd ff 
ff <0f> 0b e9 b8 fb ff ff f6 c3 04 0f 85 7b ff ff ff 49 8b 17 48 8b 05
[  444.608837] RSP: 0018:ffff9d3466e07cd0 EFLAGS: 00010202
[  444.608838] RAX: ffff9d344651c5a0 RBX: 000000000005000a RCX: 
00007ffcc64cbfff
[  444.608839] RDX: ffff9d3444d27100 RSI: 00007f2918bba000 RDI: 
ffff9d3446c49e80
[  444.608840] RBP: ffff9d3444fe50c0 R08: ffff9d3444d27108 R09: 
0000000000000001
[  444.608841] R10: ffff9d3444d27180 R11: ffff9d3444d2710c R12: 
0000000000000000
[  444.608841] R13: ffff9d3466e07de8 R14: ffff9d344651c5a0 R15: 
ffff9d3466e07d7c
[  444.608842] FS:  00007f7abfb5e840(0000) GS:ffff9d432ebc0000(0000) 
knlGS:0000000000000000
[  444.608843] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[  444.608844] CR2: 000036340030d020 CR3: 000000010fc5d000 CR4: 
0000000000350ee0
[  444.608844] Call Trace:
[  444.608846]  <TASK>
[  444.608846]  ? __warn+0x6b/0xd0
[  444.608849]  ? __get_user_pages+0x4c2/0x5b0
[  444.608850]  ? report_bug+0x143/0x190
[  444.608853]  ? handle_bug+0x36/0x70
[  444.608854]  ? exc_invalid_op+0x13/0x60
[  444.608856]  ? asm_exc_invalid_op+0x16/0x20
[  444.608858]  ? __get_user_pages+0x4c2/0x5b0
[  444.608860]  get_user_pages_remote+0xfa/0x310
[  444.608861]  __access_remote_vm+0x151/0x340
[  444.608863]  mem_rw.isra.0+0xec/0x180
[  444.608865]  vfs_read+0x8e/0x2c0
[  444.608868]  ? __count_memcg_events+0x39/0x80
[  444.608869]  ? handle_mm_fault+0xac/0x260
[  444.608870]  ? __fget_light+0x8c/0xf0
[  444.608872]  __x64_sys_pread64+0x6d/0xa0
[  444.608874]  do_syscall_64+0x35/0x80
[  444.608875]  entry_SYSCALL_64_after_hwframe+0x46/0xb0
[  444.608876] RIP: 0033:0x7f7abfc58b97
[  444.608877] Code: 08 89 3c 24 48 89 4c 24 18 e8 e5 ee f8 ff 4c 8b 54 
24 18 48 8b 54 24 10 41 89 c0 48 8b 74 24 08 8b 3c 24 b8 11 00 00 00 0f 
05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 04 24 e8 35 ef f8 ff 48 8b
[  444.608878] RSP: 002b:00007fff80823d70 EFLAGS: 00000293 ORIG_RAX: 
0000000000000011
[  444.608879] RAX: ffffffffffffffda RBX: 0000000000001000 RCX: 
00007f7abfc58b97
[  444.608880] RDX: 0000000000001000 RSI: 00007fff80824060 RDI: 
0000000000000004
[  444.608881] RBP: 00007fff80823f10 R08: 0000000000000000 R09: 
000055c771a571c0
[  444.608881] R10: 00007f2918bb9880 R11: 0000000000000293 R12: 
00007f2918bb9880
[  444.608882] R13: 0000363400229880 R14: 00007fff80824060 R15: 
0000000000001000
[  444.608883]  </TASK>
[  444.608883] ---[ end trace 0000000000000000 ]---
[  444.618816] chrome[1508]: segfault at 0 ip 000055ae15e9a2d0 sp 
00007ffcc64c7bb0 error 6 in chrome[55ae11624000+a492000] likely on CPU 6 
(core 6, socket 0)
[  444.618822] Code: 41 5c 41 5e 41 5f 5d e9 de 9e 78 fb cc 0f 0b cc cc 
cc cc cc cc cc cc cc cc cc 55 48 89 e5 48 8d 3d 85 be 55 06 e8 20 2a 87 
fb <c7> 04 25 00 00 00 00 00 00 00 00 5d c3 cc cc cc 55 48 89 e5 53 50