Greeting, FYI, we noticed the following commit (built with gcc-9): commit: 5478fcd0f48322e04ae6c173ad3a1959e066dc83 ("net: embed nr_ids in the xps maps") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: ltp version: ltp-x86_64-14c1f76-1_20210319 with following parameters: disk: 1HDD fs: xfs test: fs-02 ucode: 0xde test-description: The LTP testsuite contains a collection of tools for testing the Linux kernel and related features. test-url: http://linux-test-project.github.io/ on test machine: 8 threads Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz with 32G memory caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace): If you fix the issue, kindly add following tag Reported-by: kernel test robot [ 253.104647] BUG: sleeping function called from invalid context at include/linux/sched/mm.h:196 [ 253.113269] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 9371, name: read_all [ 253.121296] CPU: 1 PID: 9371 Comm: read_all Tainted: G I 5.12.0-rc2-00796-g5478fcd0f483 #1 [ 253.130887] Hardware name: Dell Inc. OptiPlex 7050/062KRH, BIOS 1.2.0 12/22/2016 [ 253.138288] Call Trace: [ 253.140734] dump_stack (kbuild/src/consumer/lib/dump_stack.c:122) [ 253.144055] ___might_sleep.cold (kbuild/src/consumer/kernel/sched/core.c:8331 kbuild/src/consumer/kernel/sched/core.c:8288) [ 253.148161] __kmalloc (kbuild/src/consumer/include/linux/sched/mm.h:196 kbuild/src/consumer/mm/slab.h:497 kbuild/src/consumer/mm/slub.c:2826 kbuild/src/consumer/mm/slub.c:2915 kbuild/src/consumer/mm/slub.c:4051) [ 253.151568] ? xps_rxqs_show (kbuild/src/consumer/net/core/net-sysfs.c:1498 (discriminator 2)) [ 253.155498] xps_rxqs_show (kbuild/src/consumer/net/core/net-sysfs.c:1498 (discriminator 2)) [ 253.159255] sysfs_kf_seq_show (kbuild/src/consumer/fs/sysfs/file.c:62) [ 253.163273] seq_read_iter (kbuild/src/consumer/fs/seq_file.c:227) [ 253.167030] new_sync_read (kbuild/src/consumer/fs/read_write.c:416 (discriminator 1)) [ 253.170787] vfs_read (kbuild/src/consumer/fs/read_write.c:496) [ 253.174105] ksys_read (kbuild/src/consumer/fs/read_write.c:634) [ 253.177334] do_syscall_64 (kbuild/src/consumer/arch/x86/entry/common.c:46) [ 253.180923] entry_SYSCALL_64_after_hwframe (kbuild/src/consumer/arch/x86/entry/entry_64.S:112) [ 253.185978] RIP: 0033:0x7fa906c7c50e [ 253.189555] Code: 48 8b 15 cd aa 00 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b6 0f 1f 80 00 00 00 00 8b 05 3a ef 00 00 85 c0 75 16 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5a c3 66 0f 1f 84 00 00 00 00 00 41 54 49 89 All code ======== 0: 48 8b 15 cd aa 00 00 mov 0xaacd(%rip),%rdx # 0xaad4 7: f7 d8 neg %eax 9: 64 89 02 mov %eax,%fs:(%rdx) c: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax 13: eb b6 jmp 0xffffffffffffffcb 15: 0f 1f 80 00 00 00 00 nopl 0x0(%rax) 1c: 8b 05 3a ef 00 00 mov 0xef3a(%rip),%eax # 0xef5c 22: 85 c0 test %eax,%eax 24: 75 16 jne 0x3c 26: 31 c0 xor %eax,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 5a ja 0x8c 32: c3 retq 33: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 3a: 00 00 3c: 41 54 push %r12 3e: 49 rex.WB 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 5a ja 0x62 8: c3 retq 9: 66 0f 1f 84 00 00 00 nopw 0x0(%rax,%rax,1) 10: 00 00 12: 41 54 push %r12 14: 49 rex.WB 15: 89 .byte 0x89 [ 253.208339] RSP: 002b:00007ffcb9e87038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 253.215926] RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fa906c7c50e [ 253.223064] RDX: 00000000000003ff RSI: 00007ffcb9e874f0 RDI: 0000000000000004 [ 253.230203] RBP: 00007fa906a9d000 R08: 0000000000000020 R09: 0000000000000000 [ 253.237342] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffcb9e870f0 [ 253.244481] R13: 0000000046178f11 R14: 00007ffcb9e870f1 R15: 00007ffcb9e874f0 [ 253.311298] WARNING! power/level is deprecated; use power/control instead [ 253.391095] bdi 8:16: the stable_pages_required attribute has been removed. Use the stable_writes queue attribute instead. [ 253.461822] LTP: starting fs_racer (fs_racer.sh -t 5) [ 253.462425] read_all.c:446: TPASS: Finished reading files [ 253.467003] [ 253.474072] [ 253.474074] [ 253.477410] Summary: [ 253.477413] [ 253.484390] passed 1 [ 253.484394] [ 253.489272] failed 0 [ 253.489275] [ 253.494226] broken 0 [ 253.494229] [ 253.498785] skipped 0 [ 253.498787] [ 253.503077] warnings 0 [ 253.503079] [ 253.507819] <<>> [ 253.507822] [ 253.513662] initiation_status="ok" [ 253.513665] [ 253.520191] duration=2 termination_type=exited termination_id=0 corefile=no [ 253.520195] [ 253.529408] cutime=31 cstime=146 [ 253.529411] [ 253.534670] <<>> [ 253.534673] [ 253.539491] <<>> [ 253.539493] [ 253.544909] tag=fs_racer stime=1616256119 [ 253.544912] [ 253.551150] cmdline="fs_racer.sh -t 5" [ 253.551153] [ 253.556903] contacts="" [ 253.556906] [ 253.561450] analysis=exit [ 253.561453] [ 253.566269] <<>> [ 253.566272] [ 253.571088] 1052827 [ 253.571091] [ 253.574964] 28626 [ 253.574967] [ 253.578713] 1968932 [ 253.578715] [ 253.582631] 1266945 [ 253.582634] [ 253.586490] 560991 [ 253.586492] [ 253.590260] 624408 [ 253.590263] [ 253.594108] 1824335 [ 253.594111] [ 253.597994] 544694 [ 253.597996] [ 253.601834] 1480574 [ 253.601837] [ 255.471244] 1313272 [ 255.471248] [ 255.475221] 86184 [ 255.475224] [ 255.479101] 1728568 [ 255.479104] [ 255.483123] 226081 [ 255.483126] [ 255.500155] 1048554 [ 255.500160] [ 255.504223] 1268410 [ 255.504225] [ 255.508281] 1717154 [ 255.508284] [ 255.512349] 1306802 [ 255.512352] [ 255.516330] 440748 [ 255.516333] [ 255.520196] 79348 [ 255.520200] [ 255.524114] 1129184 [ 255.524118] [ 255.528199] 1587817 [ 255.528202] [ 255.532269] 1389507 [ 255.532272] [ 255.536349] 1027069 [ 255.536352] [ 255.540361] 1513046 [ 255.540364] [ 255.544272] 449232 [ 255.544275] [ 255.866251] 83254 [ 255.866255] [ 255.870121] 1198889 To reproduce: git clone https://github.com/intel/lkp-tests.git cd lkp-tests bin/lkp install job.yaml # job file is attached in this email bin/lkp split-job --compatible job.yaml bin/lkp run compatible-job.yaml --- 0DAY/LKP+ Test Infrastructure Open Source Technology Center https://lists.01.org/hyperkitty/list/lkp@lists.01.org Intel Corporation Thanks, Oliver Sang