Hi Kernel Maintainers, Our tool found the following kernel bug "KASAN: stack-out-of-bounds Write in end_buffer_read_sync" on: HEAD Commit: 6b0f8db921abf0520081d779876d3a41069dab95 Merge tag 'execve-v6.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux kernel config: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/.config repro log: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/d41d191102504ccfea2e8408a29f03973e4ccc81/repro.log syz repro: https://github.com/androidAppGuard/KernelBugs/blob/main/6b0f8db921abf0520081d779876d3a41069dab95/d41d191102504ccfea2e8408a29f03973e4ccc81/repro.prog Please let me know if there is anything I can help. Best, HuiGuo ====================================[cut here]=========================================== BUG: KASAN: stack-out-of-bounds in instrument_atomic_read_write data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/instrumented.h:96 [inline] BUG: KASAN: stack-out-of-bounds in atomic_dec data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/atomic/atomic-instrumented.h:592 [inline] BUG: KASAN: stack-out-of-bounds in put_bh data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/buffer_head.h:303 [inline] BUG: KASAN: stack-out-of-bounds in end_buffer_read_sync+0x93/0xe0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/fs/buffer.c:161 Write of size 4 at addr ffffc90009c9f828 by task ksoftirqd/0/16 CPU: 0 UID: 0 PID: 16 Comm: ksoftirqd/0 Not tainted 6.11.0-rc3-00013-g6b0f8db921ab #1 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014 Call Trace: <TASK> __dump_stack data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/lib/dump_stack.c:93 [inline] dump_stack_lvl+0x116/0x1b0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/lib/dump_stack.c:119 print_address_description data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/kasan/report.c:377 [inline] print_report+0xc0/0x5e0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/kasan/report.c:488 kasan_report+0xbd/0xf0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/kasan/report.c:601 check_region_inline data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/kasan/generic.c:183 [inline] kasan_check_range+0xf4/0x1a0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/kasan/generic.c:189 instrument_atomic_read_write data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/instrumented.h:96 [inline] atomic_dec data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/atomic/atomic-instrumented.h:592 [inline] put_bh data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/buffer_head.h:303 [inline] end_buffer_read_sync+0x93/0xe0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/fs/buffer.c:161 end_bio_bh_io_sync+0xe7/0x140 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/fs/buffer.c:2776 bio_endio+0x6d4/0x810 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/block/bio.c:1646 blk_update_request+0x5cb/0x1780 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/block/blk-mq.c:925 blk_mq_end_request+0x5d/0x610 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/block/blk-mq.c:1053 lo_complete_rq+0x235/0x300 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/drivers/block/loop.c:386 blk_complete_reqs+0xb2/0xf0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/block/blk-mq.c:1128 handle_softirqs+0x1d7/0x870 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:554 run_ksoftirqd data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:920 smpboot_thread_fn+0x63f/0x9f0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/smpboot.c:164 kthread+0x2ca/0x3b0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/kthread.c:389 ret_from_fork+0x48/0x80 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/entry/entry_64.S:244 </TASK> The buggy address belongs to the virtual mapping at [ffffc90009c98000, ffffc90009ca1000) created by: kernel_clone+0xeb/0x910 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:2781 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x51cc1 memcg:ffff888000798d02 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000001 0000000000000000 00000001ffffffff ffff888000798d02 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 30926, tgid 30926 (syz-executor.10), ts 987852775054, free_ts 987008041304 set_page_owner data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2e7/0x350 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:1493 prep_new_page data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:1501 [inline] get_page_from_freelist+0xbf3/0x2850 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:3442 __alloc_pages_noprof+0x214/0x21e0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:4700 alloc_pages_mpol_noprof+0x262/0x610 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/mempolicy.c:2263 vm_area_alloc_pages data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/vmalloc.c:3584 [inline] __vmalloc_area_node data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/vmalloc.c:3660 [inline] __vmalloc_node_range_noprof+0xd32/0x1410 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/vmalloc.c:3841 alloc_thread_stack_node data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:313 [inline] dup_task_struct data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:1113 [inline] copy_process+0x304d/0x6f20 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:2204 kernel_clone+0xeb/0x910 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:2781 __do_sys_clone3+0x1d7/0x250 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/fork.c:3085 do_syscall_x64 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcb/0x250 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 16 tgid 16 stack trace: reset_page_owner data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/./include/linux/page_owner.h:25 [inline] free_pages_prepare data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:1094 [inline] free_unref_page+0x655/0xe40 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/mm/page_alloc.c:2612 rcu_do_batch data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/rcu/tree.c:2569 [inline] rcu_core+0x829/0x16d0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/rcu/tree.c:2843 handle_softirqs+0x1d7/0x870 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:554 run_ksoftirqd data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:928 [inline] run_ksoftirqd+0x3a/0x60 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/softirq.c:920 smpboot_thread_fn+0x63f/0x9f0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/smpboot.c:164 kthread+0x2ca/0x3b0 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/kernel/kthread.c:389 ret_from_fork+0x48/0x80 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 data/ghui/docker_data/linux_kernel/upstream/6b0f8db921abf0520081d779876d3a41069dab95/arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffffc90009c9f700: f3 f3 f3 f3 f3 00 00 00 00 00 00 00 00 00 00 00 ffffc90009c9f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90009c9f800: 00 00 00 00 00 f1 f1 f1 f1 f1 f1 01 f2 00 f2 f2 ^ ffffc90009c9f880: f2 00 00 00 00 00 00 00 f3 f3 f3 f3 f3 00 00 00 ffffc90009c9f900: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 f3 f3 f3 ========================================================================================== This report is generated by reproducing the syz repro. It may contain errors.
