Hello, syzbot found the following issue on: HEAD commit: 9221b2819b8a Add linux-next specific files for 20240503 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=1263897f180000 kernel config: https://syzkaller.appspot.com/x/.config?x=8ab537f51a6a0d98 dashboard link: https://syzkaller.appspot.com/bug?extid=d79afb004be235636ee8 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17d47450980000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/3e67dbdc3c37/disk-9221b281.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/ade618fa19f8/vmlinux-9221b281.xz kernel image: https://storage.googleapis.com/syzbot-assets/df12e5073c97/bzImage-9221b281.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/98f66c028d40/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d79afb004be235636ee8@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== 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:353 [inline] BUG: KASAN: slab-use-after-free in lru_add_fn+0x2cc/0x1a20 mm/swap.c:184 Read of size 8 at addr ffff88807ffa84a8 by task udevd/5139 CPU: 0 PID: 5139 Comm: udevd Not tainted 6.9.0-rc6-next-20240503-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Call Trace: <TASK> __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 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:353 [inline] lru_add_fn+0x2cc/0x1a20 mm/swap.c:184 folio_batch_move_lru+0x322/0x690 mm/swap.c:220 lru_add_drain_cpu+0x10e/0x8c0 mm/swap.c:657 lru_add_drain+0x123/0x3e0 mm/swap.c:757 wp_can_reuse_anon_folio mm/memory.c:3550 [inline] do_wp_page+0x2c65/0x5310 mm/memory.c:3662 handle_pte_fault+0x1189/0x70f0 mm/memory.c:5396 __handle_mm_fault mm/memory.c:5523 [inline] handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5688 do_user_addr_fault arch/x86/mm/fault.c:1338 [inline] handle_page_fault arch/x86/mm/fault.c:1481 [inline] exc_page_fault+0x459/0x8c0 arch/x86/mm/fault.c:1539 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fe7b90c72a4 Code: c0 02 49 8b 0c c6 64 8b 34 25 18 00 00 00 85 f6 75 22 48 39 cd 75 0c 48 8d 3d 24 e6 0e 00 e9 66 fe ff ff 48 c1 ea 0c 48 31 ca <48> 89 55 10 49 89 2c c6 eb 3c 89 d8 48 c1 ea 0c 48 89 ce 49 8d 3c RSP: 002b:00007ffc001e7800 EFLAGS: 00010206 RAX: 0000000000000003 RBX: 0000000000000003 RCX: 000055697463f110 RDX: 0000556c22f4b72b RSI: 0000000000000000 RDI: 000055697463b660 RBP: 000055697463b650 R08: 0000000000000007 R09: 729c72b1ba2b10a4 R10: f6f0f8c87f29ff62 R11: 0000000000000007 R12: 0000000000000000 R13: 000055697463b680 R14: 00007fe7b91f1aa0 R15: 0000556974631910 </TASK> Allocated by task 5122: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 unpoison_slab_object mm/kasan/common.c:312 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slub.c:3940 [inline] slab_alloc_node mm/slub.c:4000 [inline] kmem_cache_alloc_lru_noprof+0x139/0x2b0 mm/slub.c:4019 nilfs_alloc_inode+0x2e/0xf0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x280 fs/inode.c:1235 nilfs_iget_locked+0x12b/0x180 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x30/0x1b0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0xed/0x1a0 fs/nilfs2/super.c:557 nilfs_fill_super+0x380/0x6a0 fs/nilfs2/super.c:1067 nilfs_get_tree+0x4f9/0x920 fs/nilfs2/super.c:1211 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 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 Freed by task 0: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2195 [inline] slab_free mm/slub.c:4436 [inline] kmem_cache_free+0x145/0x350 mm/slub.c:4511 rcu_do_batch kernel/rcu/tree.c:2566 [inline] rcu_core+0xafd/0x1830 kernel/rcu/tree.c:2840 handle_softirqs+0x2d6/0x990 kernel/softirq.c:554 __do_softirq kernel/softirq.c:588 [inline] invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf4/0x1c0 kernel/softirq.c:637 irq_exit_rcu+0x9/0x30 kernel/softirq.c:649 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 Last potentially related work creation: kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:541 __call_rcu_common kernel/rcu/tree.c:3103 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3207 nilfs_put_root+0x97/0xc0 fs/nilfs2/the_nilfs.c:909 nilfs_segctor_destroy fs/nilfs2/segment.c:2753 [inline] nilfs_detach_log_writer+0x8bb/0xbe0 fs/nilfs2/segment.c:2816 nilfs_put_super+0x4d/0x160 fs/nilfs2/super.c:498 generic_shutdown_super+0x136/0x2d0 fs/super.c:642 kill_block_super+0x44/0x90 fs/super.c:1676 deactivate_locked_super+0xc4/0x130 fs/super.c:473 cleanup_mnt+0x426/0x4c0 fs/namespace.c:1267 task_work_run+0x24f/0x310 kernel/task_work.c:180 ptrace_notify+0x2d2/0x380 kernel/signal.c:2402 ptrace_report_syscall include/linux/ptrace.h:415 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:477 [inline] syscall_exit_work+0xc6/0x190 kernel/entry/common.c:173 syscall_exit_to_user_mode_prepare kernel/entry/common.c:200 [inline] __syscall_exit_to_user_mode_work kernel/entry/common.c:205 [inline] syscall_exit_to_user_mode+0x273/0x370 kernel/entry/common.c:218 do_syscall_64+0x102/0x240 arch/x86/entry/common.c:89 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff88807ffa8000 which belongs to the cache nilfs2_inode_cache of size 1512 The buggy address is located 1192 bytes inside of freed 1512-byte region [ffff88807ffa8000, ffff88807ffa85e8) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x7ffa8 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff88801f030301 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 00fff00000000040 ffff88801abec3c0 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080130013 00000001ffffefff ffff88801f030301 head: 00fff00000000040 ffff88801abec3c0 dead000000000122 0000000000000000 head: 0000000000000000 0000000080130013 00000001ffffefff ffff88801f030301 head: 00fff00000000003 ffffea0001ffea01 ffffffffffffffff 0000000000000000 head: 0000000000000008 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 5122, tgid 5122 (syz-executor.0), ts 74532588239, free_ts 16451630334 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1468 prep_new_page mm/page_alloc.c:1476 [inline] get_page_from_freelist+0x2ce2/0x2d90 mm/page_alloc.c:3438 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4696 __alloc_pages_node_noprof include/linux/gfp.h:244 [inline] alloc_pages_node_noprof include/linux/gfp.h:271 [inline] alloc_slab_page+0x5f/0x120 mm/slub.c:2264 allocate_slab+0x5a/0x2e0 mm/slub.c:2427 new_slab mm/slub.c:2480 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3666 __slab_alloc+0x58/0xa0 mm/slub.c:3756 __slab_alloc_node mm/slub.c:3809 [inline] slab_alloc_node mm/slub.c:3988 [inline] kmem_cache_alloc_lru_noprof+0x1c5/0x2b0 mm/slub.c:4019 nilfs_alloc_inode+0x2e/0xf0 fs/nilfs2/super.c:154 alloc_inode fs/inode.c:261 [inline] iget5_locked+0xa4/0x280 fs/inode.c:1235 nilfs_iget_locked+0x12b/0x180 fs/nilfs2/inode.c:606 nilfs_ifile_read+0x30/0x1b0 fs/nilfs2/ifile.c:192 nilfs_attach_checkpoint+0xed/0x1a0 fs/nilfs2/super.c:557 nilfs_fill_super+0x380/0x6a0 fs/nilfs2/super.c:1067 nilfs_get_tree+0x4f9/0x920 fs/nilfs2/super.c:1211 vfs_get_tree+0x90/0x2a0 fs/super.c:1780 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1088 [inline] free_unref_page+0xd22/0xea0 mm/page_alloc.c:2601 free_contig_range+0x9e/0x160 mm/page_alloc.c:6655 destroy_args+0x8a/0x890 mm/debug_vm_pgtable.c:1037 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1417 do_one_initcall+0x248/0x880 init/main.c:1265 do_initcall_level+0x157/0x210 init/main.c:1327 do_initcalls+0x3f/0x80 init/main.c:1343 kernel_init_freeable+0x435/0x5d0 init/main.c:1576 kernel_init+0x1d/0x2b0 init/main.c:1465 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffff88807ffa8380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ffa8400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88807ffa8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88807ffa8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88807ffa8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ================================================================== --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
