================================================================== 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:303 [inline] BUG: KASAN: out-of-bounds in end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161 Write of size 4 at addr ffffc900040376c0 by task ksoftirqd/0/15 CPU: 0 PID: 15 Comm: ksoftirqd/0 Not tainted 6.9.0-rc4-syzkaller-00173-g3cdb45594619 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114 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 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 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:303 [inline] end_buffer_read_sync+0xc1/0xd0 fs/buffer.c:161 end_bio_bh_io_sync+0xbf/0x120 fs/buffer.c:2756 req_bio_endio block/blk-mq.c:786 [inline] blk_update_request+0x545/0x1020 block/blk-mq.c:931 blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1054 blk_complete_reqs block/blk-mq.c:1129 [inline] blk_done_softirq+0x100/0x150 block/blk-mq.c:1134 __do_softirq+0x2c6/0x980 kernel/softirq.c:554 run_ksoftirqd+0xc5/0x130 kernel/softirq.c:924 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:388 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 The buggy address belongs to the virtual mapping at [ffffc90004030000, ffffc90004039000) created by: copy_process+0x5d1/0x3df0 kernel/fork.c:2220 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21f4f flags: 0xfff80000000000(node=0|zone=1|lastcpupid=0xfff) page_type: 0xffffffff() raw: 00fff80000000000 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 0x2dc2(GFP_KERNEL|__GFP_HIGHMEM|__GFP_NOWARN|__GFP_ZERO), pid 5102, tgid -903788457 (syz-executor387), ts 5102, free_ts 595943558643 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0x3410/0x35b0 mm/page_alloc.c:3317 __alloc_pages+0x256/0x6c0 mm/page_alloc.c:4575 alloc_pages_mpol+0x3e8/0x680 mm/mempolicy.c:2264 vm_area_alloc_pages mm/vmalloc.c:3561 [inline] __vmalloc_area_node mm/vmalloc.c:3637 [inline] __vmalloc_node_range+0x9a4/0x1490 mm/vmalloc.c:3818 alloc_thread_stack_node kernel/fork.c:309 [inline] dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1115 copy_process+0x5d1/0x3df0 kernel/fork.c:2220 kernel_clone+0x223/0x870 kernel/fork.c:2797 __do_sys_clone kernel/fork.c:2940 [inline] __se_sys_clone kernel/fork.c:2924 [inline] __x64_sys_clone+0x258/0x2a0 kernel/fork.c:2924 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5171 tgid 5171 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1141 [inline] free_unref_page_prepare+0x97b/0xaa0 mm/page_alloc.c:2347 free_unref_folios+0x185/0xb30 mm/page_alloc.c:2536 folios_put_refs+0x8eb/0xa10 mm/swap.c:1034 folio_batch_release include/linux/pagevec.h:101 [inline] mapping_try_invalidate+0x4d4/0x620 mm/truncate.c:526 ntfs_loadlog_and_replay+0x348/0x4f0 fs/ntfs3/fsntfs.c:330 ntfs_fill_super+0x2ca2/0x49c0 fs/ntfs3/super.c:1278 get_tree_bdev+0x3f7/0x570 fs/super.c:1614 vfs_get_tree+0x90/0x2a0 fs/super.c:1779 do_new_mount+0x2be/0xb40 fs/namespace.c:3352 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount+0x2d9/0x3c0 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc90004037580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90004037600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90004037680: 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 00 00 f2 ^ ffffc90004037700: f2 f2 f2 f2 00 f2 f2 f2 01 f3 f3 f3 00 00 00 00 ffffc90004037780: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ==================================================================