================================================================== BUG: KASAN: vmalloc-out-of-bounds in elf_validity_check kernel/module.c:3073 [inline] BUG: KASAN: vmalloc-out-of-bounds in load_module+0x4dee/0x5950 kernel/module.c:4008 Read of size 1 at addr ffffc90000a7afff by task syz.0.15/469 CPU: 0 PID: 469 Comm: syz.0.15 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 Call Trace: __dump_stack+0x21/0x24 lib/dump_stack.c:77 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248 __kasan_report mm/kasan/report.c:435 [inline] kasan_report+0xe2/0x130 mm/kasan/report.c:452 __asan_report_load1_noabort+0x14/0x20 mm/kasan/report_generic.c:306 elf_validity_check kernel/module.c:3073 [inline] load_module+0x4dee/0x5950 kernel/module.c:4008 __do_sys_init_module kernel/module.c:4226 [inline] __se_sys_init_module+0x179/0x200 kernel/module.c:4209 __x64_sys_init_module+0x76/0x80 kernel/module.c:4209 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbc5eccdf39 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc5e74f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000af RAX: ffffffffffffffda RBX: 00007fbc5ee85f80 RCX: 00007fbc5eccdf39 RDX: 0000000000000000 RSI: 0000000000000578 RDI: 0000000020000040 RBP: 00007fbc5ed40216 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fbc5ee85f80 R15: 00007ffffd2946b8 Memory state around the buggy address: ffffc90000a7ae80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90000a7af00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 >ffffc90000a7af80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90000a7b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90000a7b080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== BUG: unable to handle page fault for address: ffffc90000a7afff #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 100000067 P4D 100000067 PUD 100132067 PMD 10b2ee067 PTE 0 Oops: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 469 Comm: syz.0.15 Tainted: G B syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025 RIP: 0010:elf_validity_check kernel/module.c:3073 [inline] RIP: 0010:load_module+0x3d4/0x5950 kernel/module.c:4008 Code: 48 ba 00 00 00 00 00 fc ff df 48 8b 03 48 89 44 24 50 49 8d 5c 07 ff 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 05 4a 00 00 <80> 3b 00 0f 85 18 14 00 00 49 8d 5c 24 04 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc90001d07b80 EFLAGS: 00010282 RAX: ffff888116512701 RBX: ffffc90000a7afff RCX: 0000000000000282 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 00000000ffffffff RBP: ffffc90001d07d70 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8ec48 R11: 1ffffffff0d8ec48 R12: ffffc90000a7b3c2 R13: 1ffff9200014f68c R14: ffffc90000a7b000 R15: ffffc90000a7b000 FS: 00007fbc5e74f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000a7afff CR3: 0000000117072000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __do_sys_init_module kernel/module.c:4226 [inline] __se_sys_init_module+0x179/0x200 kernel/module.c:4209 __x64_sys_init_module+0x76/0x80 kernel/module.c:4209 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x61/0xcb RIP: 0033:0x7fbc5eccdf39 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fbc5e74f038 EFLAGS: 00000246 ORIG_RAX: 00000000000000af RAX: ffffffffffffffda RBX: 00007fbc5ee85f80 RCX: 00007fbc5eccdf39 RDX: 0000000000000000 RSI: 0000000000000578 RDI: 0000000020000040 RBP: 00007fbc5ed40216 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007fbc5ee85f80 R15: 00007ffffd2946b8 Modules linked in: CR2: ffffc90000a7afff ---[ end trace a48f924e01a81d96 ]--- RIP: 0010:elf_validity_check kernel/module.c:3073 [inline] RIP: 0010:load_module+0x3d4/0x5950 kernel/module.c:4008 Code: 48 ba 00 00 00 00 00 fc ff df 48 8b 03 48 89 44 24 50 49 8d 5c 07 ff 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 05 4a 00 00 <80> 3b 00 0f 85 18 14 00 00 49 8d 5c 24 04 48 89 d8 48 c1 e8 03 0f RSP: 0018:ffffc90001d07b80 EFLAGS: 00010282 RAX: ffff888116512701 RBX: ffffc90000a7afff RCX: 0000000000000282 RDX: dffffc0000000000 RSI: 0000000000000001 RDI: 00000000ffffffff RBP: ffffc90001d07d70 R08: 0000000000000004 R09: 0000000000000003 R10: fffffbfff0d8ec48 R11: 1ffffffff0d8ec48 R12: ffffc90000a7b3c2 R13: 1ffff9200014f68c R14: ffffc90000a7b000 R15: ffffc90000a7b000 FS: 00007fbc5e74f6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffffc90000a7afff CR3: 0000000117072000 CR4: 00000000003506a0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 7: fc ff df a: 48 8b 03 mov (%rbx),%rax d: 48 89 44 24 50 mov %rax,0x50(%rsp) 12: 49 8d 5c 07 ff lea -0x1(%r15,%rax,1),%rbx 17: 48 89 d8 mov %rbx,%rax 1a: 48 c1 e8 03 shr $0x3,%rax 1e: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 22: 84 c0 test %al,%al 24: 0f 85 05 4a 00 00 jne 0x4a2f * 2a: 80 3b 00 cmpb $0x0,(%rbx) <-- trapping instruction 2d: 0f 85 18 14 00 00 jne 0x144b 33: 49 8d 5c 24 04 lea 0x4(%r12),%rbx 38: 48 89 d8 mov %rbx,%rax 3b: 48 c1 e8 03 shr $0x3,%rax 3f: 0f .byte 0xf