[LU-20156] OSC LRU shrink panic on lov_io_slice_init()

• Type: Bug
• Resolution: Unresolved
• Priority: Medium
• Severity: 3
• Assignee: Qian Yingjin
• Reporter: Qian Yingjin

Description

the following crash on the client :

[532710.091021] BUG: unable to handle kernel NULL pointer dereference at 0000000000000033
[532710.099332] PGD 0 P4D 0
[532710.102144] Oops: 0000 #1 SMP NOPTI
[532710.106060] CPU: 15 PID: 17220 Comm: ptlrpcd_00_04 Kdump: loaded Tainted: P OE -------- - - 4.18.0-553.105.1.el8_10.x86_64 #1
[532710.119122] Hardware name: To be filled by O.E.M. To be filled by O.E.M./CER, BIOS BIOS_RME090.27.50.001 11/08/2023
[532710.129815] RIP: 0010:lov_io_slice_init+0x4e/0xb20 [lov]
[532710.135418] Code: e4 8c ff 02 0f 85 49 02 00 00 c7 83 48 01 00 00 00 00 00 00 4c 89 65 38 c7 85 30 02 00 00 fe ff ff ff 49 8b 84 24 90 00 00 00 <0f> b6 50 33 8b 03 83 f8 05 0f 84 29 07 00 00 0f 86 25 01 00 00 83
[532710.154649] RSP: 0018:ffffb7c69f9efb50 EFLAGS: 00010246
[532710.160144] RAX: 0000000000000000 RBX: ffff929f3e84c3b8 RCX: 0000000000000000
[532710.167582] RDX: ffff929f3e84c3b8 RSI: ffff92d408452bb8 RDI: ffff929f3e862d20
[532710.174988] RBP: ffff929f3e862d20 R08: ffff929f3e84c3d8 R09: ffff92c6a6800118
[532710.182435] R10: 0000000000000002 R11: ffffffffffffffff R12: ffff92d408452bb8
[532710.189834] R13: ffff92d408452bb8 R14: 0000000000000000 R15: ffffb7c69f9efea0
[532710.197235] FS: 0000000000000000(0000) GS:ffff92a64f9c0000(0000) knlGS:0000000000000000
[532710.205624] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[532710.211635] CR2: 0000000000000033 CR3: 0000001892d92000 CR4: 0000000000350ee0
[532710.219041] Call Trace:
[532710.221751] ? __die_body+0x1a/0x60
[532710.225542] ? no_context+0x1ba/0x3f0
[532710.229472] ? __bad_area_nosemaphore+0x157/0x180
[532710.234455] ? do_page_fault+0x37/0x12d
[532710.238560] ? page_fault+0x1e/0x30
[532710.242345] ? lov_io_slice_init+0x4e/0xb20 [lov]
[532710.247321] lov_io_init_composite+0xb1/0x300 [lov]
[532710.252487] lov_io_init+0xfa/0x340 [lov]
[532710.256761] cl_io_init0.isra.19+0xa6/0x160 [obdclass]
[532710.262203] osc_lru_list_shrink+0x3bc/0xba0 [osc]
[532710.267266] osc_lru_shrink+0x490/0x540 [osc]
[532710.271881] lru_queue_work+0xf2/0x230 [osc]
[532710.276412] work_interpreter+0x32/0x110 [ptlrpc]
[532710.281433] ptlrpc_check_set+0x52e/0x20e0 [ptlrpc]
[532710.286612] ? finish_task_switch+0xf0/0x2f0
[532710.291151] ptlrpcd_check+0x54c/0x5b0 [ptlrpc]
[532710.295966] ptlrpcd+0x461/0x4d0 [ptlrpc]
[532710.300287] ? finish_wait+0x80/0x80
[532710.304098] ? ptlrpcd_check+0x5b0/0x5b0 [ptlrpc]
[532710.309084] kthread+0x134/0x150
[532710.312544] ? set_kthread_struct+0x50/0x50
[532710.316957] ret_from_fork+0x35/0x40