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================================================================== BUG: KASAN: stack-out-of-bounds in user_mode arch/x86/include/asm/ptrace.h:214 [inline] BUG: KASAN: stack-out-of-bounds in unwind_next_frame+0x1ad1/0x22d0 arch/x86/kernel/unwind_orc.c:482 Read of size 2 at addr ffffc9000c20f430 by task syz.1.2167/14955 CPU: 1 UID: 0 PID: 14955 Comm: syz.1.2167 Not tainted 6.13.0-rc5-syzkaller-00161-g63676eefb7a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 user_mode arch/x86/include/asm/ptrace.h:214 [inline] unwind_next_frame+0x1ad1/0x22d0 arch/x86/kernel/unwind_orc.c:482 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save_tsk+0x24b/0x3d0 kernel/stacktrace.c:150 proc_pid_stack+0x12c/0x1e0 fs/proc/base.c:492 proc_single_show+0xff/0x1d0 fs/proc/base.c:812 traverse+0x1e1/0x550 fs/seq_file.c:111 seq_read_iter+0xc8c/0xd70 fs/seq_file.c:195 seq_read+0x3a9/0x4f0 fs/seq_file.c:162 vfs_read+0x1fe/0xb70 fs/read_write.c:563 ksys_pread64 fs/read_write.c:756 [inline] __do_sys_pread64 fs/read_write.c:764 [inline] __se_sys_pread64 fs/read_write.c:761 [inline] __x64_sys_pread64+0x1ac/0x240 fs/read_write.c:761 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 RIP: 0033:0x7f5100385d29 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:00007f51011f2038 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 00007f5100576160 RCX: 00007f5100385d29 RDX: 0000000000001005 RSI: 0000000020001580 RDI: 000000000000000b RBP: 00007f5100401b08 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f5100576160 R15: 00007ffe8dc42ec8 </TASK> The buggy address belongs to the virtual mapping at [ffffc9000c208000, ffffc9000c211000) created by: copy_process+0x5d1/0x3d50 kernel/fork.c:2224 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x38592 memcg:ffff88802fb63482 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88802fb63482 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 14937, tgid 14936 (syz.1.2167), ts 965469818304, free_ts 963821684441 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3476 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3846 alloc_thread_stack_node kernel/fork.c:314 [inline] dup_task_struct+0x444/0x8c0 kernel/fork.c:1116 copy_process+0x5d1/0x3d50 kernel/fork.c:2224 kernel_clone+0x226/0x8e0 kernel/fork.c:2806 __do_sys_clone kernel/fork.c:2949 [inline] __se_sys_clone kernel/fork.c:2933 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2933 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 14929 tgid 14922 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2659 vfree+0x1c3/0x360 mm/vmalloc.c:3383 free_partitions block/partitions/core.c:113 [inline] blk_add_partitions block/partitions/core.c:638 [inline] bdev_disk_changed+0xf3e/0x13f0 block/partitions/core.c:693 loop_reread_partitions drivers/block/loop.c:534 [inline] loop_set_status+0x70c/0x8f0 drivers/block/loop.c:1302 lo_ioctl+0xcbc/0x1f50 blkdev_ioctl+0x57f/0x6a0 block/ioctl.c:693 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf7/0x170 fs/ioctl.c:892 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 Memory state around the buggy address: ffffc9000c20f300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000c20f380: f1 f1 f1 f1 00 00 00 f2 f2 f2 f2 f2 04 f2 00 f2 >ffffc9000c20f400: f2 f2 00 00 f3 f3 f3 f3 00 00 00 00 00 00 00 00 ^ ffffc9000c20f480: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 ffffc9000c20f500: 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025/01/04 17:07 | upstream | 63676eefb7a0 | f3558dbf | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-root | KASAN: stack-out-of-bounds Read in unwind_next_frame |