search for: sys_finit_module

...nitcall+0x54/0x284) [ 8.718980] [<c0102ed0>] (do_one_initcall) from [<c01b3dd4>] (do_init_module+0x64/0x214) [ 8.727079] [<c01b3dd4>] (do_init_module) from [<c01b61a4>] (load_module+0x21b8/0x246c) [ 8.735094] [<c01b61a4>] (load_module) from [<c01b66a4>] (sys_finit_module+0xc4/0xdc) [ 8.742937] [<c01b66a4>] (sys_finit_module) from [<c0101000>] (ret_fast_syscall+0x0/0x54) [ 8.751114] Exception stack(0xed527fa8 to 0xed527ff0) [ 8.756157] 7fa0: 004c0ec0 00000000 0000000f b6f761cc 00000000 00020000 [ 8.764333] 7fc0: 004c0ec0 000...

...call+0x54/0x284) [ 19.235557] [<c0202dbc>] (do_one_initcall) from [<c02b2880>] (do_init_module+0x64/0x214) [ 19.243643] [<c02b2880>] (do_init_module) from [<c02b48c8>] (load_module+0x1e30/0x24a8) [ 19.251643] [<c02b48c8>] (load_module) from [<c02b5188>] (sys_finit_module+0xc4/0xdc) [ 19.259470] [<c02b5188>] (sys_finit_module) from [<c02011d4>] (__sys_trace_return+0x0/0x2c) [ 19.267807] Exception stack(0xed5dffa8 to 0xed5dfff0) [ 19.272853] ffa0: 00000000 b6c51c58 0000000f b6c51c58 00000000 00559220 [ 19.281018] ffc0: 000000...

.../0xa0 [<ffffffff811c84a0>] v9fs_file_readn+0x10/0x20 [<ffffffff811c84e7>] v9fs_file_read+0x37/0x70 [<ffffffff8114e3fb>] vfs_read+0x9b/0x160 [<ffffffff81153571>] kernel_read+0x41/0x60 [<ffffffff810c83ab>] copy_module_from_fd.isra.34+0xfb/0x180 [<ffffffff810cc420>] SyS_finit_module+0x70/0xd0 [<ffffffff814a08fd>] system_call_fastpath+0x1a/0x1f [<ffffffffffffffff>] 0xffffffffffffffff This is easily reproducible by trying to load a module off virtfs. QEMU will print the message that I cited in the commit message and then kill itself. P.S. I omitted the CC list the...

.../0xa0 [<ffffffff811c84a0>] v9fs_file_readn+0x10/0x20 [<ffffffff811c84e7>] v9fs_file_read+0x37/0x70 [<ffffffff8114e3fb>] vfs_read+0x9b/0x160 [<ffffffff81153571>] kernel_read+0x41/0x60 [<ffffffff810c83ab>] copy_module_from_fd.isra.34+0xfb/0x180 [<ffffffff810cc420>] SyS_finit_module+0x70/0xd0 [<ffffffff814a08fd>] system_call_fastpath+0x1a/0x1f [<ffffffffffffffff>] 0xffffffffffffffff This is easily reproducible by trying to load a module off virtfs. QEMU will print the message that I cited in the commit message and then kill itself. P.S. I omitted the CC list the...

...t;] (do_one_initcall) from [<c01b3dd4>] > > (do_init_module+0x64/0x214) > > [ 8.727079] [<c01b3dd4>] (do_init_module) from [<c01b61a4>] > > (load_module+0x21b8/0x246c) > > [ 8.735094] [<c01b61a4>] (load_module) from [<c01b66a4>] > > (sys_finit_module+0xc4/0xdc) > > [ 8.742937] [<c01b66a4>] (sys_finit_module) from [<c0101000>] > > (ret_fast_syscall+0x0/0x54) > > [ 8.751114] Exception stack(0xed527fa8 to 0xed527ff0) > > [ 8.756157] 7fa0: 004c0ec0 00000000 0000000f > > b6f761cc 0...

...1530158>] nouveau_drm_init+0x158/0x10000 [nouveau] [77216.814922] [<ffff0000080831a8>] do_one_initcall+0x44/0x128 [77216.820483] [<ffff0000081cad6c>] do_init_module+0x68/0x1e0 [77216.825957] [<ffff000008150d84>] load_module+0xfac/0x12bc [77216.831343] [<ffff00000815132c>] SyS_finit_module+0xe4/0xf0 [77216.836902] [<ffff000008082b70>] el0_svc_naked+0x24/0x28 By default fedora is using a 64k page kernel, switching to a mainline 4.9-rc7 kernel using the same configuration the same problem exists (there are a couple others, mentioned briefly in the defect). Changing the mainline...

...) > [ 19.235557] [<c0202dbc>] (do_one_initcall) from [<c02b2880>] (do_init_module+0x64/0x214) > [ 19.243643] [<c02b2880>] (do_init_module) from [<c02b48c8>] (load_module+0x1e30/0x24a8) > [ 19.251643] [<c02b48c8>] (load_module) from [<c02b5188>] (sys_finit_module+0xc4/0xdc) > [ 19.259470] [<c02b5188>] (sys_finit_module) from [<c02011d4>] (__sys_trace_return+0x0/0x2c) > [ 19.267807] Exception stack(0xed5dffa8 to 0xed5dfff0) > [ 19.272853] ffa0: 00000000 b6c51c58 0000000f b6c51c58 00000000 00559220 > [ 19....

...] [<ffffffff8113a132>] ? __vunmap+0xb2/0x100 [ 657.802441] [<ffffffff810eeb26>] load_module+0x1966/0x21b0 [ 657.802446] [<ffffffff810ec070>] ? show_initstate+0x50/0x50 [ 657.802453] [<ffffffff8115bc94>] ? vfs_read+0x114/0x160 [ 657.802458] [<ffffffff810ef4a6>] SyS_finit_module+0x86/0x90 [ 657.802465] [<ffffffff817235e2>] system_call_fastpath+0x16/0x1b [ 657.802469] Code: 74 24 18 48 89 df e8 90 ff ff ff 48 8b 5d e8 4c 8b 65 f0 4c 8b 6d f8 c9 c3 66 90 55 48 89 e5 41 55 41 54 49 89 fc 53 48 83 ec 08 <48> 8b 87 88 00 00 00 4c 8b 2f 48 85 c0 74 1b 48 8b b8 90...

...[<ffffffff810fd8f4>] ? __vunmap+0x8c/0xc4 [ 71.125060] [<ffffffff810ad804>] ? load_module+0x18d3/0x1b9a [ 71.125060] [<ffffffff810ab117>] ? mod_kobject_put+0x42/0x42 [ 71.125060] [<ffffffff81118716>] ? vfs_read+0xf7/0x13e [ 71.125060] [<ffffffff810adbad>] ? SyS_finit_module+0x4e/0x62 [ 71.125060] [<ffffffff81420c8f>] ? tracesys+0xe1/0xe6 [ 71.125060] Code: 83 c4 18 5b 5d 41 5c 41 5d c3 8b 47 08 0f b7 57 02 83 e0 fe c1 e2 04 89 c1 83 c9 01 83 c2 0c 85 f6 0f 45 c1 48 63 d2 48 03 57 28 <89> 02 c3 48 8b 46 10 48 83 ef 48 48 85 c0 74 02 ff e0 48 c7 c...

...8.718980] [<c0102ed0>] (do_one_initcall) from [<c01b3dd4>] > (do_init_module+0x64/0x214) > [ 8.727079] [<c01b3dd4>] (do_init_module) from [<c01b61a4>] > (load_module+0x21b8/0x246c) > [ 8.735094] [<c01b61a4>] (load_module) from [<c01b66a4>] > (sys_finit_module+0xc4/0xdc) > [ 8.742937] [<c01b66a4>] (sys_finit_module) from [<c0101000>] > (ret_fast_syscall+0x0/0x54) > [ 8.751114] Exception stack(0xed527fa8 to 0xed527ff0) > [ 8.756157] 7fa0: 004c0ec0 00000000 0000000f > b6f761cc 00000000 00020000 > [...

...? free_unref_page_commit.isra.88+0xd5/0x176 [ 7.407771] ? kvfree+0x3c/0x3e [ 7.407864] ? __vunmap+0x89/0xef [ 7.407960] ? do_init_module+0x1a/0x23f [ 7.408055] do_init_module+0x82/0x23f [ 7.408153] load_module+0x243c/0x36ae [ 7.408253] ? kernel_read+0x4c/0xa1 [ 7.408350] SyS_finit_module+0x78/0x8d [ 7.408447] do_fast_syscall_32+0xc1/0x31b [ 7.408545] entry_SYSENTER_32+0x4e/0x7c [ 7.408640] EIP: 0xb7ee9ad5 [ 7.408730] EFLAGS: 00000296 CPU: 0 [ 7.408823] EAX: ffffffda EBX: 00000019 ECX: b7ce0bdd EDX: 00000000 [ 7.408920] ESI: 00eb6670 EDI: 00ebe610 EBP: 00000000 E...

...> > > (do_init_module+0x64/0x214) > > > > [ 8.727079] [<c01b3dd4>] (do_init_module) from [<c01b61a4>] > > > > (load_module+0x21b8/0x246c) > > > > [ 8.735094] [<c01b61a4>] (load_module) from [<c01b66a4>] > > > > (sys_finit_module+0xc4/0xdc) > > > > [ 8.742937] [<c01b66a4>] (sys_finit_module) from [<c0101000>] > > > > (ret_fast_syscall+0x0/0x54) > > > > [ 8.751114] Exception stack(0xed527fa8 to 0xed527ff0) > > > > [ 8.756157] 7fa0: 004c0ec...

...m [<c01b3dd4>] > > > (do_init_module+0x64/0x214) > > > [ 8.727079] [<c01b3dd4>] (do_init_module) from [<c01b61a4>] > > > (load_module+0x21b8/0x246c) > > > [ 8.735094] [<c01b61a4>] (load_module) from [<c01b66a4>] > > > (sys_finit_module+0xc4/0xdc) > > > [ 8.742937] [<c01b66a4>] (sys_finit_module) from [<c0101000>] > > > (ret_fast_syscall+0x0/0x54) > > > [ 8.751114] Exception stack(0xed527fa8 to 0xed527ff0) > > > [ 8.756157] 7fa0: 004c0ec0 00000000 0000000f...

..._drm_init+0x158/0x10000 [nouveau] > [77216.814922] [<ffff0000080831a8>] do_one_initcall+0x44/0x128 > [77216.820483] [<ffff0000081cad6c>] do_init_module+0x68/0x1e0 > [77216.825957] [<ffff000008150d84>] load_module+0xfac/0x12bc > [77216.831343] [<ffff00000815132c>] SyS_finit_module+0xe4/0xf0 > [77216.836902] [<ffff000008082b70>] el0_svc_naked+0x24/0x28 > > By default fedora is using a 64k page kernel, switching to a mainline > 4.9-rc7 kernel using the same configuration the same problem exists (there > are a couple others, mentioned briefly in the defect)...

...1530158>] nouveau_drm_init+0x158/0x10000 [nouveau] [77216.814922] [<ffff0000080831a8>] do_one_initcall+0x44/0x128 [77216.820483] [<ffff0000081cad6c>] do_init_module+0x68/0x1e0 [77216.825957] [<ffff000008150d84>] load_module+0xfac/0x12bc [77216.831343] [<ffff00000815132c>] SyS_finit_module+0xe4/0xf0 [77216.836902] [<ffff000008082b70>] el0_svc_naked+0x24/0x28 By default fedora is using a 64k page kernel, switching to a mainline 4.9-rc7 kernel using the same configuration the same problem exists (there are a couple others, mentioned briefly in the defect). Changing the mainli...

...gister+0x6c/0x118 > [ 12.051385] __platform_driver_register+0x54/0x60 > [ 12.051578] nouveau_drm_init+0x164/0x1000 [nouveau] > [ 12.051584] do_one_initcall+0x44/0x138 > [ 12.051588] do_init_module+0x64/0x1dc > [ 12.051590] load_module+0x12f4/0x14b8 > [ 12.051592] SyS_finit_module+0xd8/0xf0 > [ 12.051594] el0_svc_naked+0x20/0x24 > [ 12.051597] Code: 97fffa1e d2800000 d5384101 f9800271 (c85ffe62) > [ 12.051600] ---[ end trace 7e15532ee457d321 ]--- > [ 12.346156] iommu: Adding device 15220000.display to group 1 > [ 12.360735] tegra-dpaux 15040000.dpau...

...x2b8 [ 12.051384] driver_register+0x6c/0x118 [ 12.051385] __platform_driver_register+0x54/0x60 [ 12.051578] nouveau_drm_init+0x164/0x1000 [nouveau] [ 12.051584] do_one_initcall+0x44/0x138 [ 12.051588] do_init_module+0x64/0x1dc [ 12.051590] load_module+0x12f4/0x14b8 [ 12.051592] SyS_finit_module+0xd8/0xf0 [ 12.051594] el0_svc_naked+0x20/0x24 [ 12.051597] Code: 97fffa1e d2800000 d5384101 f9800271 (c85ffe62) [ 12.051600] ---[ end trace 7e15532ee457d321 ]--- [ 12.346156] iommu: Adding device 15220000.display to group 1 [ 12.360735] tegra-dpaux 15040000.dpaux: 15040000.dpaux supply...

..._cache_alloc_trace+0x159/0x1b0 [ 2.412007] ? do_init_module+0x27/0x1f8 [ 2.412007] do_init_module+0x5f/0x1f8 [ 2.412007] load_module+0x2651/0x2a20 [ 2.412007] ? __symbol_put+0x60/0x60 [ 2.412007] ? vfs_read+0x11b/0x130 [ 2.412007] SYSC_finit_module+0xdf/0x110 [ 2.412007] SyS_finit_module+0xe/0x10 [ 2.412007] do_syscall_64+0x67/0x180 [ 2.412007] entry_SYSCALL64_slow_path+0x25/0x25 [ 2.412007] RIP: 0033:0x7fc2eccc6bf9 [ 2.412007] RSP: 002b:00007ffc233ca698 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 2.412007] RAX: ffffffffffffffda RBX: 000055ffbe27ff60 RCX: 00007fc...

..._cache_alloc_trace+0x159/0x1b0 [ 2.412007] ? do_init_module+0x27/0x1f8 [ 2.412007] do_init_module+0x5f/0x1f8 [ 2.412007] load_module+0x2651/0x2a20 [ 2.412007] ? __symbol_put+0x60/0x60 [ 2.412007] ? vfs_read+0x11b/0x130 [ 2.412007] SYSC_finit_module+0xdf/0x110 [ 2.412007] SyS_finit_module+0xe/0x10 [ 2.412007] do_syscall_64+0x67/0x180 [ 2.412007] entry_SYSCALL64_slow_path+0x25/0x25 [ 2.412007] RIP: 0033:0x7fc2eccc6bf9 [ 2.412007] RSP: 002b:00007ffc233ca698 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 [ 2.412007] RAX: ffffffffffffffda RBX: 000055ffbe27ff60 RCX: 00007fc...

The 9p-virtio transport does zero copy on things larger than 1024 bytes in size. It accomplishes this by returning the physical addresses of pages to the virtio-pci device. At present, the translation is usually a bit shift. However, that approach produces an invalid page address when we read/write to vmalloc buffers, such as those used for Linux kernle modules. This causes QEMU to die printing: