================================================================== BUG: KASAN: stack-out-of-bounds in idempotent kernel/module/main.c:3078 [inline] BUG: KASAN: stack-out-of-bounds in init_module_from_file+0x62c/0x6a0 kernel/module/main.c:3124 Read of size 8 at addr ffffc90028297e20 by task syz-executor.3/9313 CPU: 3 PID: 9313 Comm: syz-executor.3 Not tainted 6.4.0-syzkaller-10173-ga901a3568fd2 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:364 print_report mm/kasan/report.c:475 [inline] kasan_report+0x11d/0x130 mm/kasan/report.c:588 idempotent kernel/module/main.c:3078 [inline] init_module_from_file+0x62c/0x6a0 kernel/module/main.c:3124 __do_sys_finit_module kernel/module/main.c:3171 [inline] __se_sys_finit_module kernel/module/main.c:3154 [inline] __x64_sys_finit_module+0xfd/0x190 kernel/module/main.c:3154 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f124a88c389 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f124b649168 EFLAGS: 00000246 ORIG_RAX: 0000000000000139 RAX: ffffffffffffffda RBX: 00007f124a9abf80 RCX: 00007f124a88c389 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000003 RBP: 00007f124a8d7493 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffcdf75c6af R14: 00007f124b649300 R15: 0000000000022000 The buggy address belongs to the virtual mapping at [ffffc90028290000, ffffc90028299000) created by: kernel_clone+0xeb/0x890 kernel/fork.c:2911 The buggy address belongs to the physical page: page:ffffea0004602600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x118098 flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 057ff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 9292, tgid 9292 (syz-executor.1), ts 210552435997, free_ts 210517675602 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0xfed/0x2d30 mm/page_alloc.c:3221 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4477 alloc_pages+0x1aa/0x270 mm/mempolicy.c:2279 vm_area_alloc_pages mm/vmalloc.c:3059 [inline] __vmalloc_area_node mm/vmalloc.c:3135 [inline] __vmalloc_node_range+0xb1c/0x14c0 mm/vmalloc.c:3316 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct kernel/fork.c:1112 [inline] copy_process+0x13bb/0x75c0 kernel/fork.c:2329 kernel_clone+0xeb/0x890 kernel/fork.c:2911 __do_sys_clone+0xba/0x100 kernel/fork.c:3054 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2348 free_unref_page+0x33/0x370 mm/page_alloc.c:2443 __folio_put_small mm/swap.c:106 [inline] __folio_put+0xc5/0x140 mm/swap.c:129 folio_put include/linux/mm.h:1421 [inline] put_page include/linux/mm.h:1490 [inline] free_page_and_swap_cache+0x257/0x2c0 mm/swap_state.c:304 __tlb_remove_table arch/x86/include/asm/tlb.h:34 [inline] __tlb_remove_table_free mm/mmu_gather.c:153 [inline] tlb_remove_table_rcu+0x89/0xe0 mm/mmu_gather.c:208 rcu_do_batch kernel/rcu/tree.c:2135 [inline] rcu_core+0x802/0x1c10 kernel/rcu/tree.c:2399 __do_softirq+0x1d4/0x905 kernel/softirq.c:553 Memory state around the buggy address: ffffc90028297d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90028297d80: f1 f1 f1 f1 04 f3 f3 f3 00 00 00 00 00 00 00 00 >ffffc90028297e00: 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 00 00 ^ ffffc90028297e80: 00 00 f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 ffffc90028297f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================