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Message-ID: <CAGXu5jKLVrgS8nWitpO0gkvLkSRF5TYNW4UMZEXJ6R4yGBA2tw@mail.gmail.com> Date: Mon, 13 Aug 2018 16:14:27 -0700 From: Kees Cook <keescook@...omium.org> To: kernel test robot <rong.a.chen@...el.com> Cc: LKML <linux-kernel@...r.kernel.org>, LKP <lkp@...org> Subject: Re: [LKP] ca90800a91 [ 3.251519] WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:4061 __alloc_pages_nodemask Hi, This is the expected output when running the lib/test_overflow.c tests. Thanks, -Kees On Sun, Aug 12, 2018 at 5:13 PM, kernel test robot <rong.a.chen@...el.com> wrote: > Greetings, > > 0day kernel testing robot got the below dmesg and the first bad commit is > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master > > commit ca90800a91ba723d78ded634d037c1d2df8b54d6 > Author: Kees Cook <keescook@...omium.org> > AuthorDate: Thu May 10 16:40:03 2018 -0700 > Commit: Kees Cook <keescook@...omium.org> > CommitDate: Tue Jun 5 12:16:51 2018 -0700 > > test_overflow: Add memory allocation overflow tests > > Make sure that the memory allocators are behaving as expected in the face > of overflows of multiplied arguments or when using the array_size()-family > helpers. > > Example output of new tests (with the expected __alloc_pages_slowpath > and vmalloc warnings about refusing giant allocations removed): > > [ 93.062076] test_overflow: kmalloc detected saturation > [ 93.062988] test_overflow: kmalloc_node detected saturation > [ 93.063818] test_overflow: kzalloc detected saturation > [ 93.064539] test_overflow: kzalloc_node detected saturation > [ 93.120386] test_overflow: kvmalloc detected saturation > [ 93.143458] test_overflow: kvmalloc_node detected saturation > [ 93.166861] test_overflow: kvzalloc detected saturation > [ 93.189924] test_overflow: kvzalloc_node detected saturation > [ 93.221671] test_overflow: vmalloc detected saturation > [ 93.246326] test_overflow: vmalloc_node detected saturation > [ 93.270260] test_overflow: vzalloc detected saturation > [ 93.293824] test_overflow: vzalloc_node detected saturation > [ 93.294597] test_overflow: devm_kmalloc detected saturation > [ 93.295383] test_overflow: devm_kzalloc detected saturation > [ 93.296217] test_overflow: all tests passed > > Signed-off-by: Kees Cook <keescook@...omium.org> > > 610b15c50e overflow.h: Add allocation size calculation helpers > ca90800a91 test_overflow: Add memory allocation overflow tests > ec0c96714e Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net > 4110b42356 Add linux-next specific files for 20180810 > +-----------------------------------------------------+------------+------------+------------+---------------+ > | | 610b15c50e | ca90800a91 | ec0c96714e | next-20180810 | > +-----------------------------------------------------+------------+------------+------------+---------------+ > | boot_successes | 72 | 0 | 0 | 0 | > | boot_failures | 1 | 49 | 18 | 20 | > | Mem-Info | 1 | 49 | 18 | 20 | > | WARNING:at_mm/page_alloc.c:#__alloc_pages_nodemask | 0 | 49 | 18 | 20 | > | EIP:__alloc_pages_nodemask | 0 | 49 | 18 | 20 | > | WARNING:at_arch/x86/mm/dump_pagetables.c:#note_page | 0 | 0 | 0 | 20 | > | EIP:note_page | 0 | 0 | 0 | 20 | > +-----------------------------------------------------+------------+------------+------------+---------------+ > > [ 3.249253] test_overflow: s8 : 19 tests > [ 3.249696] test_overflow: u16: 17 tests > [ 3.250151] test_overflow: s16: 17 tests > [ 3.250599] test_overflow: u32: 17 tests > [ 3.251039] test_overflow: s32: 17 tests > [ 3.251519] WARNING: CPU: 0 PID: 1 at mm/page_alloc.c:4061 __alloc_pages_nodemask+0x2e9/0xe12 > [ 3.252625] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G T 4.17.0-rc4-00006-gca90800 #1151 > [ 3.253474] EIP: __alloc_pages_nodemask+0x2e9/0xe12 > [ 3.253474] EFLAGS: 00210246 CPU: 0 > [ 3.253474] EAX: 00200140 EBX: 00000000 ECX: 00000000 EDX: 00000001 > [ 3.253474] ESI: 7a7af300 EDI: 014040c0 EBP: 7fc4fde4 ESP: 7fc4fd38 > [ 3.253474] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 > [ 3.253474] CR0: 80050033 CR2: 00000000 CR3: 02a90000 CR4: 000006d0 > [ 3.253474] Call Trace: > [ 3.253474] ? sched_clock_cpu+0x11c/0x155 > [ 3.253474] ? _raw_spin_unlock+0x2c/0x45 > [ 3.253474] ? free_one_page+0x28b/0x423 > [ 3.253474] ? kmalloc_order+0x20/0x2f > [ 3.253474] ? kmalloc_order_trace+0x1b/0xe0 > [ 3.253474] ? __kmalloc+0x180/0x227 > [ 3.253474] ? kfree+0x1d3/0x1f6 > [ 3.253474] ? test_kmalloc+0xe6/0x137 > [ 3.253474] ? test_module_init+0x2297/0x30e3 > [ 3.253474] ? preempt_count_sub+0xa/0x67 > [ 3.253474] ? preempt_count_sub+0x44/0x67 > [ 3.253474] ? _raw_spin_unlock_irqrestore+0x41/0x6a > [ 3.253474] ? add_device_randomness+0xb1/0x208 > [ 3.253474] ? test_kzalloc+0x137/0x137 > [ 3.253474] ? do_one_initcall+0x10d/0x392 > [ 3.253474] ? do_early_param+0xf7/0xf7 > [ 3.253474] ? kernel_init_freeable+0x2a1/0x42b > [ 3.253474] ? rest_init+0x10d/0x10d > [ 3.253474] ? kernel_init+0x10/0xf3 > [ 3.253474] ? schedule_tail_wrapper+0x9/0xc > [ 3.253474] ? ret_from_fork+0x19/0x24 > [ 3.253474] Code: 0c 8b 33 85 f6 75 e2 64 ff 0d c8 76 93 7a 74 05 e9 3a fe ff ff e8 42 ae ec ff e9 30 fe ff ff f7 c7 00 02 00 00 0f 85 11 fe ff ff <0f> 0b e9 0a fe ff ff 64 8b 15 cc 76 93 7a 83 ba 58 0a 00 00 63 > [ 3.253474] ---[ end trace 48b5392a6d84e6d7 ]--- > [ 3.269794] test_overflow: kmalloc detected saturation > > # HH:MM RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD > git bisect start e4f6a44c4aeca9eda153302abb0c14d053914f72 v4.17 -- > git bisect bad ec65e266ae548ea560c7f109c3d9749abcc877b5 # 04:54 B 0 1 78 31 staging:rtl8192u: typedef struct tx_fwinfo_819x_usb remove typedef > git bisect bad e62b4e21d1edf1cbe6d79e4c05fdbd56190a57aa # 05:13 B 0 2 46 30 staging: rtl8192u: Truncate block comments to 80 character length - Style > git bisect bad ab0b2e59323cd3972e5f011fbbf3868a4ec360dd # 05:27 B 0 1 17 2 Merge tag 'upstream-4.18-rc1' of git://git.infradead.org/linux-ubifs > git bisect good af6c5d5e01ad9f2c9ca38cccaae6b5d67ddd241f # 06:26 G 10 0 0 0 Merge branch 'for-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/wq > git bisect bad 68abbe729567cef128b2c2141f2ed2567f3b8372 # 06:26 B 0 50 115 0 Merge branch 'akpm' (patches from Andrew) > git bisect bad da315f6e03988a7127680bbc26e1028991b899b8 # 06:26 B 0 45 93 0 Merge tag 'fuse-update-4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse > git bisect good 0eb0061381b2bac082cc26d573fc48fe99db3922 # 07:25 G 10 0 0 0 Merge tag 'for-linus-4.18' of git://github.com/cminyard/linux-ipmi > git bisect good 8b5c6a3a49d9ebc7dc288870b9c56c4f946035d8 # 08:20 G 10 0 0 0 Merge tag 'audit-pr-20180605' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit > git bisect bad 285767604576148fc1be7fcd112e4a90eb0d6ad2 # 08:20 B 0 59 133 0 Merge tag 'overflow-v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux > git bisect good 5eb6eed7e0fe880dc8de8da203cc888716bbf196 # 09:38 G 10 0 0 0 Merge tag 'trace-v4.18' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace > git bisect bad ca90800a91ba723d78ded634d037c1d2df8b54d6 # 12:17 B 0 1 86 38 test_overflow: Add memory allocation overflow tests > git bisect good 6d3344324b5ae49fc8cb599a2c687e5607ba6e9f # 12:17 G 11 0 0 0 test_overflow: macrofy some more, do more tests for free > git bisect good 610b15c50e86eb1e4b77274fabcaea29ac72d6a8 # 12:17 G 19 0 0 3 overflow.h: Add allocation size calculation helpers > # first bad commit: [ca90800a91ba723d78ded634d037c1d2df8b54d6] test_overflow: Add memory allocation overflow tests > git bisect good 610b15c50e86eb1e4b77274fabcaea29ac72d6a8 # 13:08 G 30 0 0 4 overflow.h: Add allocation size calculation helpers > # extra tests on HEAD of chao-linux/erofs-dev > git bisect bad dfc9ffb5362ab48bdb5dec53f1e726965d7eb115 # 13:08 B 0 17 38 0 staging: erofs: fix race when the managed cache is enabled > # extra tests on tree/branch linus/master > git bisect bad ec0c96714e7ddeda4eccaa077f5646a0fd6e371f # 13:09 B 0 18 51 0 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net > # extra tests on tree/branch linux-next/master > git bisect bad 4110b42356f3f8e237659eb85b0ec1f479044cdf # 13:14 B 0 16 30 0 Add linux-next specific files for 20180810 > > --- > 0-DAY kernel test infrastructure Open Source Technology Center > https://lists.01.org/pipermail/lkp Intel Corporation -- Kees Cook Pixel Security
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