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================================================================== BUG: KASAN: out-of-bounds in copy_from_kernel_nofault+0xa5/0x2e0 mm/maccess.c:36 Write of size 8 at addr ffffc90004497330 by task syz.3.34/5440 CPU: 1 UID: 0 PID: 5440 Comm: syz.3.34 Not tainted 6.11.0-rc4-next-20240821-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:377 [inline] print_report+0x169/0x550 mm/kasan/report.c:488 kasan_report+0x143/0x180 mm/kasan/report.c:601 copy_from_kernel_nofault+0xa5/0x2e0 mm/maccess.c:36 get_kernel_gp_address arch/x86/kernel/traps.c:554 [inline] __exc_general_protection arch/x86/kernel/traps.c:733 [inline] exc_general_protection+0x3c2/0x5d0 arch/x86/kernel/traps.c:693 </TASK> The buggy address belongs to stack of task syz.3.34/5440 The buggy address belongs to the virtual mapping at [ffffc90004490000, ffffc90004499000) created by: copy_process+0x5d1/0x3d50 kernel/fork.c:2206 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x3 pfn:0x7e3bc memcg:ffff88802b624182 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000003 0000000000000000 00000001ffffffff ffff88802b624182 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 5233, tgid 5233 (syz-executor), ts 66210599981, free_ts 66183164531 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1517 prep_new_page mm/page_alloc.c:1525 [inline] get_page_from_freelist+0x3004/0x30c0 mm/page_alloc.c:3476 __alloc_pages_noprof+0x29e/0x780 mm/page_alloc.c:4743 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 vm_area_alloc_pages mm/vmalloc.c:3600 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0xa40/0x1400 mm/vmalloc.c:3850 alloc_thread_stack_node kernel/fork.c:314 [inline] dup_task_struct+0x444/0x8c0 kernel/fork.c:1115 copy_process+0x5d1/0x3d50 kernel/fork.c:2206 kernel_clone+0x226/0x8f0 kernel/fork.c:2787 __do_sys_clone kernel/fork.c:2930 [inline] __se_sys_clone kernel/fork.c:2914 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2914 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5233 tgid 5233 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1098 [inline] free_unref_folios+0xe8a/0x1850 mm/page_alloc.c:2699 folios_put_refs+0x76e/0x860 mm/swap.c:1007 folio_batch_release include/linux/pagevec.h:101 [inline] mapping_try_invalidate+0x3b1/0x4f0 mm/truncate.c:515 ext4_put_super+0x666/0xd50 fs/ext4/super.c:1348 generic_shutdown_super+0x139/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1696 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7289 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x41f/0x4b0 fs/namespace.c:1373 task_work_run+0x24f/0x310 kernel/task_work.c:228 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] exit_to_user_mode_loop kernel/entry/common.c:114 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline] syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90004497200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004497280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004497300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffffc90004497380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004497400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
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2024/08/21 14:17 | linux-next | eb8c5ca373cb | db5852f9 | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-linux-next-kasan-gce-root | KASAN: out-of-bounds Write in copy_from_kernel_nofault |