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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, Aug 19, 2021 at 2:28 PM Russell King (Oracle) wrote: > > On Thu, Aug 19, 2021 at 10:19:46AM -0700, Tim Harvey wrote: > > Greetings, > > > > Since commit a8e53c151fe7 "(ARM: 8737/1: mm: dump: add checking for > > writable and executable)" I've been seeing the following appear on my > > arm32 kernel: > > > > arm/mm: Found insecure W+X mapping at address 0xf087d000 > > ... > > Checked W+X mappings: FAILED, 1 W+X pages found > > > > As I haven't seen others report this I assume it's something unique to > > my kernel configuration. How do I debug what is causing the insecure > > page? > > If you check /proc/vmallocinfo, it should tell you the physical > address that was mapped there, and the function that created the > mapping. That should give enough clues to track it down. > Russell, Thanks for the tip! # dmesg | grep insecure [ 13.219582] arm/mm: Found insecure W+X mapping at address 0xf087d000 # cat /proc/vmallocinfo | grep 0xf0 0x5f3045dd-0xf0020e05 20480 imx6_pm_get_base+0x64/0x98 phys=0x020e0000 ioremap 0xf0020e05-0x6e748217 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x127639d7-0x334ee291 4096 iotable_init+0x0/0xf0 phys=0x00a00000 ioremap So this is saying its dma-coherent mapped from dma_common_continguous_remap? # cat /proc/vmallocinfo 0x572091e4-0x27690de5 20480 of_iomap+0x44/0x68 phys=0x020d8000 ioremap 0x27690de5-0x35897f01 8192 of_iomap+0x44/0x68 phys=0x00a01000 ioremap 0xe3186ca4-0x0f1ef5e3 20480 of_iomap+0x44/0x68 phys=0x020dc000 ioremap 0x0f1ef5e3-0x5ece7ccc 8192 l2x0_of_init+0x78/0x26c phys=0x00a02000 ioremap 0xb5c85079-0xc2ca2734 20480 of_iomap+0x44/0x68 phys=0x020c4000 ioremap 0xc2ca2734-0xaf3c42de 8192 of_iomap+0x44/0x68 phys=0x020c8000 ioremap 0x28e036be-0xd5974946 20480 of_iomap+0x44/0x68 phys=0x020c4000 ioremap 0xeae42964-0xc4e615a6 20480 of_iomap+0x44/0x68 phys=0x02098000 ioremap 0x6a6bab5f-0x3ecf3e8c 8192 bpf_prog_alloc_no_stats+0x2c/0x118 pages=1 vmalloc 0x3ecf3e8c-0xbb5cf07d 266240 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xbb5cf07d-0x1a6cd05a 8192 gen_pool_add_owner+0x34/0x94 pages=1 vmalloc 0x1a6cd05a-0xcafd679a 8192 of_syscon_register+0xb8/0x2a0 phys=0x020c8000 ioremap 0xcafd679a-0xab606572 8192 __devm_ioremap+0x94/0xa4 phys=0x020c9000 ioremap 0xab606572-0xd42260ec 8192 __devm_ioremap+0x94/0xa4 phys=0x020ca000 ioremap 0xd42260ec-0xcbe84677 8192 gen_pool_add_owner+0x34/0x94 pages=1 vmalloc 0xcbe84677-0x235c7c16 20480 of_iomap+0x44/0x68 phys=0x021b0000 ioremap 0x235c7c16-0xb235d3f3 8192 imx6_pm_common_init+0x118/0x36c phys=0x00900000 ioremap 0x47e7e130-0x808ca2d4 266240 __devm_ioremap+0x50/0xa4 phys=0x00900000 ioremap 0x808ca2d4-0xfccba85b 8192 imx6_pm_get_base+0x64/0x98 phys=0x00a02000 ioremap 0x800f4671-0xc7775acd 20480 imx6_pm_get_base+0x64/0x98 phys=0x021b0000 ioremap 0xc7775acd-0xa724d9e0 8192 of_syscon_register+0xb8/0x2a0 phys=0x020e0000 ioremap 0xb762f02e-0xed6991ca 20480 imx6_pm_get_base+0x64/0x98 phys=0x020d8000 ioremap 0xed6991ca-0xdbb588fa 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x5f3045dd-0xf0020e05 20480 imx6_pm_get_base+0x64/0x98 phys=0x020e0000 ioremap 0xf0020e05-0x6e748217 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x0b51e410-0x3d898417 20480 imx6_pm_get_base+0x64/0x98 phys=0x020dc000 ioremap 0x3d898417-0x86992438 8192 __devm_ioremap+0x94/0xa4 phys=0x02600000 ioremap 0x6464407c-0x60718db5 20480 __devm_ioremap+0x94/0xa4 phys=0x020e0000 ioremap 0x4c7be824-0xfe1fc1f2 20480 __devm_ioremap+0x94/0xa4 phys=0x0209c000 ioremap 0xfe1fc1f2-0x46954edf 8192 __devm_ioremap+0x94/0xa4 phys=0x02608000 ioremap 0x53446305-0x435a58b4 20480 __devm_ioremap+0x94/0xa4 phys=0x020a0000 ioremap 0x435a58b4-0x2e1fc59d 8192 __devm_ioremap+0x94/0xa4 phys=0x02630000 ioremap 0x3f2c2f34-0x01a2f43c 20480 __devm_ioremap+0x94/0xa4 phys=0x020a4000 ioremap 0x01a2f43c-0x6b20a97a 8192 __devm_ioremap+0x94/0xa4 phys=0x02638000 ioremap 0x6fd6457c-0xe0eb3463 20480 __devm_ioremap+0x94/0xa4 phys=0x020a8000 ioremap 0xe0eb3463-0xec4965e5 8192 __devm_ioremap+0x94/0xa4 phys=0x02620000 ioremap 0x5c03cdf7-0x3b1b3493 20480 __devm_ioremap+0x94/0xa4 phys=0x020ac000 ioremap 0x3b1b3493-0xad9aee67 8192 __devm_ioremap+0x94/0xa4 phys=0x02668000 ioremap 0x92feb1f5-0x7414f542 20480 __devm_ioremap+0x94/0xa4 phys=0x020b0000 ioremap 0x7414f542-0x7a40d77f 8192 __devm_ioremap+0x94/0xa4 phys=0x02640000 ioremap 0x8ee37216-0xbe006eb2 20480 __devm_ioremap+0x94/0xa4 phys=0x020b4000 ioremap 0x29a6ecde-0x80a7a60b 12288 __devm_ioremap+0x94/0xa4 phys=0x00110000 ioremap 0x80a7a60b-0x3db02e14 8192 __devm_ioremap+0x94/0xa4 phys=0x02648000 ioremap 0x60036855-0x1e6802e0 20480 __devm_ioremap+0x94/0xa4 phys=0x021a0000 ioremap 0x1e6802e0-0x62fd3e57 8192 __devm_ioremap+0x94/0xa4 phys=0x02658000 ioremap 0xabcb6908-0xa070b2ec 20480 __devm_ioremap+0x94/0xa4 phys=0x021a4000 ioremap 0xa070b2ec-0xe713ec73 8192 __devm_ioremap+0x94/0xa4 phys=0x02780000 ioremap 0x1d8444e1-0xcac4726c 20480 __devm_ioremap+0x94/0xa4 phys=0x021a8000 ioremap 0xcac4726c-0x8025cc0f 8192 __devm_ioremap+0x94/0xa4 phys=0x02660000 ioremap 0x1ae47ba3-0xf8c7f1ca 20480 __devm_ioremap+0x94/0xa4 phys=0x021d8000 ioremap 0xf8c7f1ca-0x32e09fa4 8192 __devm_ioremap+0x94/0xa4 phys=0x02740000 ioremap 0x4d10befe-0x60b4c1e9 20480 __devm_ioremap+0x94/0xa4 phys=0x01ffc000 ioremap 0x60b4c1e9-0xb3a54244 8192 __devm_ioremap+0x94/0xa4 phys=0x02650000 ioremap 0xe04d1c20-0x97be33d0 20480 __devm_ioremap+0x94/0xa4 phys=0x020ec000 ioremap 0x97be33d0-0xc1afe24c 8192 __devm_ioremap+0x94/0xa4 phys=0x02a00000 ioremap 0xac1caf35-0x7ceb30f1 20480 of_syscon_register+0xb8/0x2a0 phys=0x021bc000 ioremap 0x7ceb30f1-0x245e06af 8192 __devm_ioremap+0x94/0xa4 phys=0x02a08000 ioremap 0x6c5425e7-0x84bc25cc 20480 __devm_ioremap+0x94/0xa4 phys=0x020dc000 ioremap 0x84bc25cc-0x595056c5 8192 __devm_ioremap+0x94/0xa4 phys=0x02a30000 ioremap 0x074d8ed7-0x2e4d1a53 20480 __devm_ioremap+0x94/0xa4 phys=0x02020000 ioremap 0x2e4d1a53-0x95ed192f 8192 __devm_ioremap+0x94/0xa4 phys=0x02a38000 ioremap 0x19e0356d-0x45e14fed 20480 __devm_ioremap+0x94/0xa4 phys=0x021e8000 ioremap 0x45e14fed-0xe690f152 8192 __devm_ioremap+0x94/0xa4 phys=0x02a20000 ioremap 0x991fa501-0x9fdabf5a 20480 __devm_ioremap+0x94/0xa4 phys=0x021f4000 ioremap 0x9fdabf5a-0x3e67dae9 8192 __devm_ioremap+0x94/0xa4 phys=0x02a68000 ioremap 0x82e937d0-0x0811797e 40960 __devm_ioremap+0x94/0xa4 phys=0x00120000 ioremap 0x0811797e-0x923f8a88 8192 __devm_ioremap+0x94/0xa4 phys=0x02a40000 ioremap 0x923f8a88-0x206017e5 20480 __devm_ioremap+0x94/0xa4 phys=0x00130000 ioremap 0x206017e5-0x6c990a7b 8192 __devm_ioremap+0x94/0xa4 phys=0x02a48000 ioremap 0x99673e2c-0x2cac9053 20480 __devm_ioremap+0x94/0xa4 phys=0x00134000 ioremap 0x2cac9053-0x85ae7df8 8192 __devm_ioremap+0x94/0xa4 phys=0x02a58000 ioremap 0x85ae7df8-0x4405ccb4 8192 __devm_ioremap+0x94/0xa4 phys=0x02b80000 ioremap 0x4405ccb4-0xae8efb1a 8192 __devm_ioremap+0x94/0xa4 phys=0x02a60000 ioremap 0x126bbd24-0x2249ff6f 528384 devm_pci_remap_cfgspace+0x3c/0x74 phys=0x01f00000 ioremap 0x2249ff6f-0x8c2e304c 135168 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x8c2e304c-0x0bf3a28c 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x0bf3a28c-0x96e17d3f 20480 __devm_ioremap+0x94/0xa4 phys=0x02204000 ioremap 0x96e17d3f-0xa4daba8c 528384 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xa4daba8c-0xe6185530 8192 __devm_ioremap+0x94/0xa4 phys=0x02b40000 ioremap 0xe6185530-0x821c3b4a 8192 __devm_ioremap+0x94/0xa4 phys=0x02a50000 ioremap 0xbd3e3c5d-0x597081d3 135168 __devm_ioremap+0x94/0xa4 phys=0x02700000 ioremap 0x0f8ddd13-0x32e4fd76 12288 __devm_ioremap+0x94/0xa4 phys=0x00112000 ioremap 0x32e4fd76-0x811b112c 8192 __pci_enable_msix_range+0x1b4/0x50c phys=0x01420000 ioremap 0xce8aec4a-0xb2dd309c 69632 __devm_ioremap+0x94/0xa4 phys=0x02760000 ioremap 0xb2dd309c-0x5ff80254 81920 pcpu_create_chunk+0x14c/0x290 pages=19 vmalloc 0x6325b825-0xd6880a57 8192 __devm_ioremap+0x94/0xa4 phys=0x02184000 ioremap 0xd6880a57-0x01fdf853 135168 __devm_ioremap+0x94/0xa4 phys=0x02b00000 ioremap 0xfbfae5e4-0x34f66182 12288 __devm_ioremap+0x94/0xa4 phys=0x00114000 ioremap 0x34f66182-0x9759721e 8192 __devm_ioremap+0x94/0xa4 phys=0x02184000 ioremap 0xff9a433f-0x6ffcb3fc 69632 __devm_ioremap+0x94/0xa4 phys=0x02b60000 ioremap 0x6ffcb3fc-0x925370c6 4153344 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x89e10860-0x935fedfd 20480 __devm_ioremap+0x94/0xa4 phys=0x02200000 ioremap 0x935fedfd-0xb3e1eed1 98304 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xb3e1eed1-0xd19ae2f1 36864 iscsi_target_init_module+0xb4/0x234 pages=8 vmalloc 0xd19ae2f1-0x4ef92f29 20480 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x0e67a0eb-0x32add077 20480 __devm_ioremap+0x94/0xa4 phys=0x0200c000 ioremap 0x32add077-0xf2ae7966 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x24b26351-0x10c489ec 20480 __devm_ioremap+0x94/0xa4 phys=0x02188000 ioremap 0x10c489ec-0x99550a81 135168 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x99550a81-0xb8546101 36864 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xb757667d-0x00d14870 20480 __devm_ioremap+0x94/0xa4 phys=0x021e4000 ioremap 0x00d14870-0x4997051a 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xcd1bbc96-0x5470c56e 20480 __devm_ioremap+0x94/0xa4 phys=0x020c0000 ioremap 0x5470c56e-0x5041fe43 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x27c17eec-0x5f300c54 20480 __devm_ioremap+0x94/0xa4 phys=0x02198000 ioremap 0x5f300c54-0x779e324f 8192 __devm_ioremap+0x94/0xa4 phys=0x02184000 ioremap 0x71eda903-0x08c271b0 135168 igb_probe+0x150/0x10a4 phys=0x01400000 ioremap 0x08c271b0-0xaad09678 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x20320ae4-0x995de6c0 20480 __devm_ioremap+0x94/0xa4 phys=0x02034000 ioremap 0x995de6c0-0x53fe07bc 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x66a2a7f0-0x144dcde1 20480 __devm_ioremap+0x94/0xa4 phys=0x02028000 ioremap 0x144dcde1-0x28fcbfb5 8192 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xd4d631e6-0x89b9dbd5 20480 __devm_ioremap+0x94/0xa4 phys=0x0202c000 ioremap 0x89b9dbd5-0xba573900 16384 n_tty_open+0x10/0x9c pages=3 vmalloc 0xf1af7427-0x2dd3f3b0 528384 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x7ea79487-0xb5aa9a4a 528384 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0xb5aa9a4a-0x38706b86 1294336 zstd_comp_init+0x58/0xb0 pages=315 vmalloc 0x38706b86-0x2073eebb 163840 zstd_decomp_init+0x14/0x54 pages=39 vmalloc 0x2073eebb-0x0e3cf5f0 274432 deflate_comp_init+0x20/0x90 pages=66 vmalloc 0x0e3cf5f0-0x03c153c7 49152 deflate_decomp_init+0x14/0x58 pages=11 vmalloc 0x32a3b715-0x45627fc0 249856 __devm_ioremap+0x94/0xa4 phys=0x02040000 ioremap 0x45627fc0-0x8420dc4c 212992 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x8420dc4c-0x0268f3a7 528384 dma_common_contiguous_remap+0x88/0xa4 dma-coherent 0x127639d7-0x334ee291 4096 iotable_init+0x0/0xf0 phys=0x00a00000 ioremap 0x9569c0e1-0x413f89f0 2097152 pci_reserve_io+0x0/0x30 ioremap 0x1fa52fb4-0xe4568750 311296 pcpu_get_vm_areas+0x0/0x10c0 vmalloc 0xe4568750-0x2633c5e5 311296 pcpu_get_vm_areas+0x0/0x10c0 vmalloc 0x8276ef58-0x572091e4 16384 unpurged vm_area 0xd5974946-0xe417a989 8192 unpurged vm_area 0xc4e615a6-0x6a6bab5f 8192 unpurged vm_area 0x60718db5-0x4c7be824 15609856 unpurged vm_area 0x821c3b4a-0xbd3e3c5d 73728 unpurged vm_area 0x597081d3-0x0f8ddd13 36864 unpurged vm_area 0x5ff80254-0x6325b825 36864 unpurged vm_area 0x01fdf853-0xfbfae5e4 36864 unpurged vm_area 0x925370c6-0x208e0e7e 442368 unpurged vm_area 0xe1ca9db2-0xf1af7427 249856 unpurged vm_area 0x2dd3f3b0-0x7ea79487 36864 unpurged vm_area Thanks, Tim _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org 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