bisecting cause commit starting from d2b6f8a179194de0ffc4886ffc2c4358d86047b8 building syzkaller on 77e2b66864e69c17416614228723a1ebd3581ddc testing commit d2b6f8a179194de0ffc4886ffc2c4358d86047b8 with gcc (GCC) 10.2.1 20210217 kernel signature: b7253b0050d1f751d90ce6b983fb4a7e7bf11d4a50d7f907247a56a5adb8f87d all runs: crashed: WARNING in do_proc_bulk testing release v5.12 testing commit 9f4ad9e425a1d3b6a34617b8ea226d56a119a717 with gcc (GCC) 10.2.1 20210217 kernel signature: 6d40b6f5a7f53d09bcc7ad172c8408bec51ae18bb9bd92c662d0f974261d6325 all runs: crashed: WARNING in do_proc_bulk testing release v5.11 testing commit f40ddce88593482919761f74910f42f4b84c004b with gcc (GCC) 10.2.1 20210217 kernel signature: 293e6579f0d65cbda46b2d20e15f30555f6e4ea292502f9356c74a1affb84b2f all runs: crashed: WARNING in do_proc_bulk testing release v5.10 testing commit 2c85ebc57b3e1817b6ce1a6b703928e113a90442 with gcc (GCC) 10.2.1 20210217 kernel signature: aa5dbcb7b6350e128566df7b79649d445731318f591bef7c95206222f351bb67 all runs: crashed: WARNING in do_proc_bulk testing release v5.9 testing commit bbf5c979011a099af5dc76498918ed7df445635b with gcc (GCC) 10.2.1 20210217 kernel signature: 5c24f3f4b62492843caa7e7e852285d332e09df8819536e003a2c6149fac4abc all runs: crashed: WARNING in do_proc_bulk testing release v5.8 testing commit bcf876870b95592b52519ed4aafcf9d95999bc9c with gcc (GCC) 8.4.1 20210217 kernel signature: e064f1b90e3cfa434cb136ae367ce886a75f83b37d3f635477c7b19461094f39 all runs: crashed: WARNING in proc_bulk testing release v5.7 testing commit 3d77e6a8804abcc0504c904bd6e5cdf3a5cf8162 with gcc (GCC) 8.4.1 20210217 kernel signature: 0c3b42a2623ff57e7e764989f96f47d87aded95e87d9e48275f1a3c8bd52969b all runs: crashed: WARNING in proc_bulk testing release v5.6 testing commit 7111951b8d4973bda27ff663f2cf18b663d15b48 with gcc (GCC) 8.4.1 20210217 kernel signature: d9f64012349e0d74c7c908ab911c6276e4b0f83458da87d57127cd8708aa9c37 all runs: crashed: WARNING in proc_bulk testing release v5.5 testing commit d5226fa6dbae0569ee43ecfc08bdcd6770fc4755 with gcc (GCC) 8.4.1 20210217 kernel signature: ba676d29733da0c4728588193fbc641be89b273270ae57d0f4d0c16812a703ca all runs: crashed: WARNING in proc_bulk testing release v5.4 testing commit 219d54332a09e8d8741c1e1982f5eae56099de85 with gcc (GCC) 8.4.1 20210217 kernel signature: 949001b74ebcba9a4ee8693b8e891d0971c58010c6cfc40dc44eae5156602299 all runs: crashed: WARNING in proc_bulk testing release v5.3 testing commit 4d856f72c10ecb060868ed10ff1b1453943fc6c8 with gcc (GCC) 8.4.1 20210217 kernel signature: 27db41da572d7dda09afa86fde3174208da7993bb7e612668a1cfabfaa835453 all runs: crashed: WARNING in proc_bulk testing release v5.2 testing commit 0ecfebd2b52404ae0c54a878c872bb93363ada36 with gcc (GCC) 8.4.1 20210217 kernel signature: fb55f61533c1f812a87ea4d303fbacd0bee896a9e9b47b9c03fd35c7e1df8fcb all runs: crashed: WARNING in proc_bulk testing release v5.1 testing commit e93c9c99a629c61837d5a7fc2120cd2b6c70dbdd with gcc (GCC) 8.4.1 20210217 kernel signature: 7ff787ec748fd4b4054fc566ed6baf33d0070560a739f8fe7451fac0d442fcdd all runs: crashed: WARNING in proc_bulk testing release v5.0 testing commit 1c163f4c7b3f621efff9b28a47abb36f7378d783 with gcc (GCC) 8.4.1 20210217 kernel signature: 81b3bf7f25380ba4392ce949e5929e3211138c41f890748c7daf296e91692a03 all runs: crashed: WARNING in proc_bulk testing release v4.20 testing commit 8fe28cb58bcb235034b64cbbb7550a8a43fd88be with gcc (GCC) 8.4.1 20210217 kernel signature: b4afd50dc65fd7832ede4a7eeefd7f17635e76d72e74d420051916264dd6c8e4 all runs: crashed: WARNING in proc_bulk testing release v4.19 testing commit 84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d with gcc (GCC) 8.4.1 20210217 kernel signature: c45f88d8247fc71bc54393d8694abc247384e172cc0b09aa0d5cfa76092854ba all runs: crashed: WARNING in proc_bulk testing release v4.18 testing commit 94710cac0ef4ee177a63b5227664b38c95bbf703 with gcc (GCC) 8.4.1 20210217 kernel signature: 95649ca167694092c08614cdab3828e0a61ca37a8ed50d9b0d33e126b6e99f0b all runs: crashed: WARNING in proc_bulk testing release v4.17 testing commit 29dcea88779c856c7dc92040a0c01233263101d4 with gcc (GCC) 8.4.1 20210217 failed to run ["make" "-j" "64" "ARCH=x86_64" "CC=/syzkaller/shared/bisect_bin/gcc-8.1.0/bin/gcc" "bzImage"]: exit status 2 testing release v4.16 testing commit 0adb32858b0bddf4ada5f364a84ed60b196dbcda with gcc (GCC) 8.4.1 20210217 orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.15 testing commit d8a5b80568a9cb66810e75b182018e9edb68e8ff with gcc (GCC) 8.4.1 20210217 orc_dump.c:106:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:111:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] elf.c:135:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:140:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.14 testing commit bebc6082da0a9f5d47a1ea2edc099bf671058bd4 with gcc (GCC) 8.4.1 20210217 orc_dump.c:105:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] orc_dump.c:110:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:36:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:134:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:139:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.13 testing commit 569dbb88e80deb68974ef6fdd6a13edb9d686261 with gcc (GCC) 8.4.1 20210217 pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:144:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:149:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.12 testing commit 6f7da290413ba713f0cdd9ff1a2a9bb129ef4f6c with gcc (GCC) 8.4.1 20210217 pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.11 testing commit a351e9b9fc24e982ec2f0e76379a49826036da12 with gcc (GCC) 7.5.0 elf.c:141:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:146:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.10 testing commit c470abd4fde40ea6a0846a2beab642a578c0b8cd with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.9 testing commit 69973b830859bc6529a7a0468ba0d80ee5117826 with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] pager.c:35:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.8 testing commit c8d2bc9bc39ebea8437fd974fdbc21847bb897a3 with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] elf.c:129:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:134:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] testing release v4.7 testing commit 523d939ef98fd712632d93a5a2b588e477a7565e with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] elf.c:122:2: error: 'elf_getshnum' is deprecated [-Werror=deprecated-declarations] elf.c:127:2: error: 'elf_getshstrndx' is deprecated [-Werror=deprecated-declarations] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] testing release v4.6 testing commit 2dcd0af568b0cf583645c8a317dd12e344b1c72a with gcc (GCC) 5.5.0 tools/include/linux/log2.h:19:1: error: ignoring attribute 'noreturn' because it conflicts with attribute 'const' [-Werror=attributes] pager.c:33:12: error: passing argument 2 to 'restrict'-qualified parameter aliases with argument 4 [-Werror=restrict] revisions tested: 17, total time: 2h58m30.380665051s (build: 2h0m36.733789046s, test: 52m53.793392273s) the crash already happened on the oldest tested release commit msg: Linux 4.18 crash: WARNING in proc_bulk usb usb9: usbfs: process 9966 (syz-executor.3) did not claim interface 0 before use usb usb9: usbfs: process 9970 (syz-executor.0) did not claim interface 0 before use usb usb9: usbfs: process 9968 (syz-executor.5) did not claim interface 0 before use WARNING: CPU: 1 PID: 9968 at mm/page_alloc.c:4065 __alloc_pages_slowpath mm/page_alloc.c:4065 [inline] WARNING: CPU: 1 PID: 9968 at mm/page_alloc.c:4065 __alloc_pages_nodemask+0x1ce1/0x2780 mm/page_alloc.c:4389 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 9968 Comm: syz-executor.5 Not tainted 4.18.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x15a/0x20d lib/dump_stack.c:113 panic+0x1c6/0x36b kernel/panic.c:184 __warn.cold.7+0x120/0x168 kernel/panic.c:536 report_bug+0x1a1/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:992 RIP: 0010:__alloc_pages_slowpath mm/page_alloc.c:4065 [inline] RIP: 0010:__alloc_pages_nodemask+0x1ce1/0x2780 mm/page_alloc.c:4389 Code: fd ff ff 85 c0 0f 85 d1 f7 ff ff c7 85 0c fe ff ff 00 00 00 00 e9 a8 ec ff ff f7 85 24 fe ff ff 00 02 00 00 0f 85 cd e6 ff ff <0f> 0b e9 c6 e6 ff ff 8b 9d 44 fe ff ff ba 10 00 00 00 48 8b 8d 28 RSP: 0018:ffff8800a348f650 EFLAGS: 00010246 RAX: ffff8800a348f878 RBX: 0000000000000000 RCX: ffff88013fffd1f0 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000006040c0 RBP: ffff8800a348f8a0 R08: 0000000000000000 R09: 00000000000f64ea R10: ffffed0047fff27c R11: ffff88023fff93e7 R12: ffff88008990b180 R13: ffff88013fffd1c0 R14: 0000000000000000 R15: 00000000006040c0 alloc_pages_current+0xd6/0x1b0 mm/mempolicy.c:2093 alloc_pages include/linux/gfp.h:492 [inline] kmalloc_order+0x1f/0x70 mm/slab_common.c:1183 kmalloc_order_trace+0x1f/0x1b0 mm/slab_common.c:1194 kmalloc_large include/linux/slab.h:447 [inline] __kmalloc+0x307/0x3a0 mm/slub.c:3742 kmalloc include/linux/slab.h:518 [inline] proc_bulk+0x241/0x640 drivers/usb/core/devio.c:1178 usbdev_do_ioctl+0x1133/0x27a0 drivers/usb/core/devio.c:2400 usbdev_ioctl+0x9/0x10 drivers/usb/core/devio.c:2550 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:500 [inline] do_vfs_ioctl+0x196/0x1050 fs/ioctl.c:684 ksys_ioctl+0x62/0x90 fs/ioctl.c:701 __do_sys_ioctl fs/ioctl.c:708 [inline] __se_sys_ioctl fs/ioctl.c:706 [inline] __x64_sys_ioctl+0x6e/0xb0 fs/ioctl.c:706 do_syscall_64+0xda/0x540 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x4665f9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f1967d40188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9 RDX: 0000000020000240 RSI: 00000000c0185502 RDI: 0000000000000004 RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 0000000000a9fb1f R14: 00007f1967d40300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..