loop2: rw=395265, sector=2040, nr_sectors = 2 limit=0 Buffer I/O error on dev loop2, logical block 1020, lost sync page write NILFS (loop2): unable to write superblock: err=-5 syz-executor.2: attempt to access beyond end of device loop2: rw=395265, sector=2, nr_sectors = 2 limit=0 Buffer I/O error on dev loop2, logical block 1, lost sync page write NILFS (loop2): unable to write superblock: err=-5 ================================================================== BUG: KASAN: slab-use-after-free in instrument_atomic_read include/linux/instrumented.h:68 [inline] BUG: KASAN: slab-use-after-free in _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] BUG: KASAN: slab-use-after-free in mapping_unevictable include/linux/pagemap.h:257 [inline] BUG: KASAN: slab-use-after-free in folio_evictable mm/internal.h:256 [inline] BUG: KASAN: slab-use-after-free in lru_add_fn+0x19b/0xd80 mm/swap.c:197 Read of size 8 at addr ffff8880614884a8 by task syz-executor.2/5088 CPU: 1 PID: 5088 Comm: syz-executor.2 Not tainted 6.9.0-rc6-syzkaller-00290-gb9158815de52 #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+0x116/0x1f0 lib/dump_stack.c:114 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc3/0x620 mm/kasan/report.c:488 kasan_report+0xd9/0x110 mm/kasan/report.c:601 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] mapping_unevictable include/linux/pagemap.h:257 [inline] folio_evictable mm/internal.h:256 [inline] lru_add_fn+0x19b/0xd80 mm/swap.c:197 folio_batch_move_lru+0x243/0x400 mm/swap.c:233 lru_add_drain_cpu+0x534/0x860 mm/swap.c:667 lru_add_drain+0x109/0x440 mm/swap.c:767 __folio_batch_release+0x68/0xb0 mm/swap.c:1091 folio_batch_release include/linux/pagevec.h:101 [inline] writeback_get_folio mm/page-writeback.c:2417 [inline] writeback_iter+0xda0/0x1160 mm/page-writeback.c:2520 writeback_use_writepage mm/page-writeback.c:2588 [inline] do_writepages+0x2d7/0x7f0 mm/page-writeback.c:2614 __writeback_single_inode+0x163/0xf90 fs/fs-writeback.c:1650 writeback_single_inode+0x2b5/0x5a0 fs/fs-writeback.c:1771 write_inode_now+0x174/0x1f0 fs/fs-writeback.c:2813 iput_final fs/inode.c:1728 [inline] iput.part.0+0x4a4/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 nilfs_put_super+0xb8/0x1b0 fs/nilfs2/super.c:508 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_block_super+0x3b/0x90 fs/super.c:1675 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 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+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f5aa7c7efd7 Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8 RSP: 002b:00007ffc96bea508 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000064 RCX: 00007f5aa7c7efd7 RDX: 0000000000000200 RSI: 0000000000000009 RDI: 00007ffc96beb6b0 RBP: 00007f5aa7cc83b9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffc96beb6b0 R13: 00007f5aa7cc83b9 R14: 00005555927cd430 R15: 000000000000001e Allocated by task 6030: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] kmem_cache_alloc_lru+0x142/0x6f0 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:155 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_locked+0xa1/0xe0 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x2f/0x1e0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0x12d/0x1d0 fs/nilfs2/super.c:558 nilfs_fill_super fs/nilfs2/super.c:1075 [inline] nilfs_mount+0x9b4/0xe70 fs/nilfs2/super.c:1298 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 vfs_get_tree+0x8f/0x380 fs/super.c:1779 do_new_mount fs/namespace.c:3352 [inline] path_mount+0x14e6/0x1f20 fs/namespace.c:3679 do_mount fs/namespace.c:3692 [inline] __do_sys_mount fs/namespace.c:3898 [inline] __se_sys_mount fs/namespace.c:3875 [inline] __x64_sys_mount+0x297/0x320 fs/namespace.c:3875 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 5088: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:579 poison_slab_object mm/kasan/common.c:240 [inline] __kasan_slab_free+0x11d/0x1a0 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2106 [inline] slab_free mm/slub.c:4280 [inline] kmem_cache_free+0x12e/0x380 mm/slub.c:4344 i_callback+0x43/0x70 fs/inode.c:250 rcu_do_batch kernel/rcu/tree.c:2196 [inline] rcu_core+0x828/0x16b0 kernel/rcu/tree.c:2471 __do_softirq+0x218/0x922 kernel/softirq.c:554 Last potentially related work creation: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xba/0xd0 mm/kasan/generic.c:541 __call_rcu_common.constprop.0+0x9a/0x790 kernel/rcu/tree.c:2734 destroy_inode+0x12c/0x1b0 fs/inode.c:316 iput_final fs/inode.c:1741 [inline] iput.part.0+0x5a8/0x7f0 fs/inode.c:1767 iput+0x5c/0x80 fs/inode.c:1757 nilfs_put_root+0xae/0xe0 fs/nilfs2/the_nilfs.c:910 nilfs_segctor_destroy fs/nilfs2/segment.c:2753 [inline] nilfs_detach_log_writer+0x5e0/0xa90 fs/nilfs2/segment.c:2816 nilfs_put_super+0x43/0x1b0 fs/nilfs2/super.c:499 generic_shutdown_super+0x159/0x3d0 fs/super.c:641 kill_block_super+0x3b/0x90 fs/super.c:1675 deactivate_locked_super+0xbe/0x1a0 fs/super.c:472 deactivate_super+0xde/0x100 fs/super.c:505 cleanup_mnt+0x222/0x450 fs/namespace.c:1267 task_work_run+0x14e/0x250 kernel/task_work.c:180 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+0x278/0x2a0 kernel/entry/common.c:218 do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888061488000 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff888061488000, ffff8880614885e8) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888061489338 pfn:0x61488 head: order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888023b2c201 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff88801afd1280 ffffea0001793000 0000000000000002 raw: ffff888061489338 0000000000130008 00000001ffffffff ffff888023b2c201 head: 00fff00000000840 ffff88801afd1280 ffffea0001793000 0000000000000002 head: ffff888061489338 0000000000130008 00000001ffffffff ffff888023b2c201 head: 00fff00000000003 ffffea0001852201 dead000000000122 00000000ffffffff head: 0000000800000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 5416, tgid 1100911256 (syz-executor.0), ts 5417, free_ts 100061637061 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d4/0x350 mm/page_alloc.c:1534 prep_new_page mm/page_alloc.c:1541 [inline] get_page_from_freelist+0xa28/0x3780 mm/page_alloc.c:3317 __alloc_pages+0x22b/0x2460 mm/page_alloc.c:4575 __alloc_pages_node include/linux/gfp.h:238 [inline] alloc_pages_node include/linux/gfp.h:261 [inline] alloc_slab_page mm/slub.c:2175 [inline] allocate_slab mm/slub.c:2338 [inline] new_slab+0xcc/0x3a0 mm/slub.c:2391 ___slab_alloc+0x66d/0x1790 mm/slub.c:3525 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3610 __slab_alloc_node mm/slub.c:3663 [inline] slab_alloc_node mm/slub.c:3835 [inline] kmem_cache_alloc_lru+0x379/0x6f0 mm/slub.c:3864 alloc_inode_sb include/linux/fs.h:3091 [inline] nilfs_alloc_inode+0x26/0x150 fs/nilfs2/super.c:155 alloc_inode+0x5d/0x230 fs/inode.c:261 iget5_locked fs/inode.c:1235 [inline] iget5_locked+0x1c9/0x2c0 fs/inode.c:1228 nilfs_iget_for_shadow+0xe4/0x2f0 fs/nilfs2/inode.c:742 nilfs_mdt_setup_shadow_map+0x8c/0x150 fs/nilfs2/mdt.c:523 nilfs_dat_read+0x26d/0x360 fs/nilfs2/dat.c:525 nilfs_load_super_root fs/nilfs2/the_nilfs.c:120 [inline] load_nilfs+0x383/0x12a0 fs/nilfs2/the_nilfs.c:301 nilfs_fill_super fs/nilfs2/super.c:1070 [inline] nilfs_mount+0x941/0xe70 fs/nilfs2/super.c:1298 legacy_get_tree+0x109/0x220 fs/fs_context.c:662 page last free pid 5089 tgid 5089 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+0x527/0xb10 mm/page_alloc.c:2347 free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:322 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3798 [inline] slab_alloc_node mm/slub.c:3845 [inline] __do_kmalloc_node mm/slub.c:3965 [inline] __kmalloc_node+0x1e9/0x480 mm/slub.c:3973 kmalloc_node include/linux/slab.h:648 [inline] kvmalloc_node+0x9d/0x1a0 mm/util.c:634 kvmalloc include/linux/slab.h:766 [inline] xt_alloc_table_info+0x3e/0xa0 net/netfilter/x_tables.c:1193 do_replace net/ipv6/netfilter/ip6_tables.c:1143 [inline] do_ip6t_set_ctl+0x59d/0xc40 net/ipv6/netfilter/ip6_tables.c:1644 nf_setsockopt+0x8a/0xf0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x133/0x1a0 net/ipv6/ipv6_sockglue.c:999 tcp_setsockopt+0xa4/0x100 net/ipv4/tcp.c:3737 do_sock_setsockopt+0x222/0x480 net/socket.c:2311 __sys_setsockopt+0x1a4/0x270 net/socket.c:2334 __do_sys_setsockopt net/socket.c:2343 [inline] __se_sys_setsockopt net/socket.c:2340 [inline] __x64_sys_setsockopt+0xbd/0x160 net/socket.c:2340 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83 Memory state around the buggy address: ffff888061488380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888061488400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888061488480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888061488500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888061488580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ==================================================================