================================================================== BUG: KASAN: out-of-bounds in instrument_atomic_read_write include/linux/instrumented.h:96 [inline] BUG: KASAN: out-of-bounds in atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline] BUG: KASAN: out-of-bounds in put_bh include/linux/buffer_head.h:333 [inline] BUG: KASAN: out-of-bounds in end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161 Write of size 4 at addr ffffc90003e3f700 by task ksoftirqd/1/21 CPU: 1 PID: 21 Comm: ksoftirqd/1 Not tainted 6.5.0-syzkaller-01044-g36534782b584 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x175/0x1b0 mm/kasan/report.c:588 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:187 instrument_atomic_read_write include/linux/instrumented.h:96 [inline] atomic_dec include/linux/atomic/atomic-instrumented.h:592 [inline] put_bh include/linux/buffer_head.h:333 [inline] end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161 end_bio_bh_io_sync+0xb7/0x110 fs/buffer.c:2794 req_bio_endio block/blk-mq.c:782 [inline] blk_update_request+0x53f/0x1020 block/blk-mq.c:927 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1050 blk_complete_reqs block/blk-mq.c:1130 [inline] blk_done_softirq+0x103/0x150 block/blk-mq.c:1135 __do_softirq+0x2ab/0x908 kernel/softirq.c:553 run_ksoftirqd+0xc5/0x120 kernel/softirq.c:921 smpboot_thread_fn+0x533/0x9f0 kernel/smpboot.c:164 kthread+0x2b8/0x350 kernel/kthread.c:389 ret_from_fork+0x2e/0x60 arch/x86/kernel/process.c:145 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:304 The buggy address belongs to the virtual mapping at [ffffc90003e38000, ffffc90003e41000) created by: copy_process+0x5c8/0x4290 kernel/fork.c:2338 The buggy address belongs to the physical page: page:ffffea00008afc00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x22bf0 memcg:ffff88807dc33902 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff88807dc33902 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 8920, tgid 8920 (syz-executor.0), ts 289990223972, free_ts 288946384543 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x31e8/0x3370 mm/page_alloc.c:3221 __alloc_pages+0x255/0x670 mm/page_alloc.c:4477 vm_area_alloc_pages mm/vmalloc.c:3063 [inline] __vmalloc_area_node mm/vmalloc.c:3139 [inline] __vmalloc_node_range+0x9a3/0x1490 mm/vmalloc.c:3320 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct+0x3e5/0x7d0 kernel/fork.c:1121 copy_process+0x5c8/0x4290 kernel/fork.c:2338 kernel_clone+0x22d/0x7b0 kernel/fork.c:2920 __do_sys_clone3 kernel/fork.c:3221 [inline] __se_sys_clone3+0x2cb/0x340 kernel/fork.c:3205 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 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+0x903/0xa30 mm/page_alloc.c:2348 free_unref_page_list+0x596/0x830 mm/page_alloc.c:2489 release_pages+0x2193/0x2470 mm/swap.c:1042 tlb_batch_pages_flush mm/mmu_gather.c:97 [inline] tlb_flush_mmu_free mm/mmu_gather.c:292 [inline] tlb_flush_mmu+0x100/0x210 mm/mmu_gather.c:299 tlb_finish_mmu+0xd4/0x1f0 mm/mmu_gather.c:391 exit_mmap+0x3e2/0xad0 mm/mmap.c:3215 __mmput+0x115/0x3c0 kernel/fork.c:1356 exit_mm+0x21f/0x300 kernel/exit.c:567 do_exit+0x612/0x2290 kernel/exit.c:861 do_group_exit+0x206/0x2c0 kernel/exit.c:1024 get_signal+0x1709/0x17e0 kernel/signal.c:2881 arch_do_signal_or_restart+0x91/0x670 arch/x86/kernel/signal.c:308 exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168 exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:204 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline] syscall_exit_to_user_mode+0x64/0x280 kernel/entry/common.c:296 do_syscall_64+0x4d/0xc0 arch/x86/entry/common.c:86 Memory state around the buggy address: ffffc90003e3f600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 f2 ffffc90003e3f680: f2 f2 f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 >ffffc90003e3f700: 00 00 00 00 00 00 00 00 00 00 00 00 00 f2 f2 f2 ^ ffffc90003e3f780: f2 f2 f2 f2 f2 f2 00 00 00 00 00 00 00 00 00 00 ffffc90003e3f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================