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From:   Bruno Goncalves <bgoncalv@redhat.com>
Date:   Tue, 24 Aug 2021 10:09:52 +0200
Message-ID: <CA+QYu4q-sNwhHLOwCQLc=bFwXidH=g-Pnc=eUn_UXm4wm3TURA@mail.gmail.com>
Subject: BUG: sleeping function called from invalid context at mm/page_alloc.c:5169
To:     linux-kernel@vger.kernel.org
Cc:     CKI Project <cki-project@redhat.com>,
        Memory Management <mm-qe@redhat.com>
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Hello,

Since commit "002c0aef1090 - Merge tag 'block-5.14-2021-08-20'" we
started to see the following call trace when booting up, it seems to
be reproducible only on ppc64le.

[    4.112119] in_atomic(): 0, irqs_disabled(): 1, non_block: 0, pid:
1240, name: systemd-udevd
[    4.112150] 1 lock held by systemd-udevd/1240:
[    4.112173]  #0: c0000000026f41e0 (ftrace_lock){+.+.}-{3:3}, at:
ftrace_process_locs.isra.0+0x278/0x530
[    4.112230] irq event stamp: 40788
[    4.112241] hardirqs last  enabled at (40787): [<c0000000004ce300>]
bad_range+0x1d0/0x200
[    4.112281] hardirqs last disabled at (40788): [<c0000000000b09e4>]
patch_instruction+0x3b4/0x510
[    4.112322] softirqs last  enabled at (36242): [<c0000000011e7c1c>]
__do_softirq+0x60c/0x67c
[    4.112364] softirqs last disabled at (36233): [<c000000000165544>]
__irq_exit_rcu+0x234/0x240
[    4.112395] CPU: 56 PID: 1240 Comm: systemd-udevd Not tainted 5.14.0-rc6 #1
[    4.112432] Call Trace:
[    4.112451] [c00000004495f4d0] [c000000000971054]
dump_stack_lvl+0x98/0xe0 (unreliable)
[    4.112485] [c00000004495f510] [c0000000001a920c] ___might_sleep+0x2dc/0x300
[    4.112516] [c00000004495f5a0] [c0000000004cef8c]
prepare_alloc_pages.constprop.0+0x19c/0x280
[    4.112563] [c00000004495f5f0] [c0000000004d86bc] __alloc_pages+0x9c/0x350
[    4.112601] [c00000004495f670] [c00000000050ca0c] alloc_pages+0xcc/0x190
[    4.112643] [c00000004495f6c0] [c00000000008ed0c]
pte_fragment_alloc+0xdc/0x2e0
[    4.112682] [c00000004495f720] [c00000000049d620]
__pte_alloc_kernel+0x40/0xf0
[    4.112723] [c00000004495f770] [c00000000009d4dc]
__map_kernel_page+0x5dc/0x6d0
[    4.112765] [c00000004495f810] [c0000000000b09cc]
patch_instruction+0x39c/0x510
[    4.112807] [c00000004495f8b0] [c000000000077ab4] ftrace_make_nop+0x164/0x730
[    4.112849] [c00000004495f9b0] [c0000000003060ec]
ftrace_process_locs.isra.0+0x39c/0x530
[    4.112893] [c00000004495fa90] [c00000000029ab1c] load_module+0x322c/0x3cb0
[    4.112935] [c00000004495fca0] [c00000000029b8e4]
__do_sys_finit_module+0xc4/0x130
[    4.112977] [c00000004495fdb0] [c00000000002dd5c]
system_call_exception+0x11c/0x2f0
[    4.113021] [c00000004495fe10] [c00000000000c1f0]
system_call_vectored_common+0xf0/0x280
[    4.113064] --- interrupt: 3000 at 0x7fffb67ebeac
[    4.113099] NIP:  00007fffb67ebeac LR: 0000000000000000 CTR: 0000000000000000
[    4.113135] REGS: c00000004495fe80 TRAP: 3000   Not tainted  (5.14.0-rc6)
[    4.113170] MSR:  900000000000f033 <SF,HV,EE,PR,FP,ME,IR,DR,RI,LE>
CR: 48224244  XER: 00000000
[    4.113232] IRQMASK: 0
               GPR00: 0000000000000161 00007ffff63902d0
00007fffb68f6f00 0000000000000006
               GPR04: 00007fffb69cb678 0000000000000000
0000000000000006 0000000000000000
               GPR08: 0000000000000000 0000000000000000
0000000000000000 0000000000000000
               GPR12: 0000000000000000 00007fffb5627810
0000000020000000 0000000000000000
               GPR16: 0000000000000000 00000000000f4240
00007ffff6390828 000000011b8846e0
               GPR20: 0000000000000000 0000000124033bf0
00007fffb6d209d0 0000000124034070
               GPR24: 0000000000000000 0000000124032440
0000000000000007 00007fffb69cb678
               GPR28: 000000012402bd10 0000000000020000
00000001240342c0 0000000124032440
[    4.113534] NIP [00007fffb67ebeac] 0x7fffb67ebeac
[    4.113558] LR [0000000000000000] 0x0
[    4.113588] --- interrupt: 3000


More logs can be found checking out dmesg logs on:
https://arr-cki-prod-datawarehouse-public.s3.amazonaws.com/datawarehouse-public/2021/08/21/357093404/build_ppc64le_redhat%3A1522897150/tests/Boot_test/10527926_ppc64le_2_dmesg.log
https://arr-cki-prod-datawarehouse-public.s3.amazonaws.com/datawarehouse-public/2021/08/23/357988779/build_ppc64le_redhat%3A1526871701/tests/Reboot_test/10534932_ppc64le_2_dmesg.log

Thank you,
Bruno Goncalves