UDPLite: UDP-Lite is deprecated and scheduled to be removed in 2025, please contact the netdev mailing list loop0: detected capacity change from 0 to 32768 BTRFS: device fsid ed167579-eb65-4e76-9a50-61ac97e9b59d devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5315) BTRFS info (device loop0): first mount of filesystem ed167579-eb65-4e76-9a50-61ac97e9b59d BTRFS info (device loop0): using sha256 (sha256-avx2) checksum algorithm BTRFS info (device loop0): rebuilding free space tree BTRFS info (device loop0): disabling free space tree BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1) BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2) BTRFS info (device loop0): balance: start -d -m BTRFS info (device loop0): relocating block group 6881280 flags data|metadata BTRFS info (device loop0): relocating block group 5242880 flags data|metadata ================================================================== BUG: KASAN: slab-use-after-free in do_perf_trace_btrfs_cow_block include/trace/events/btrfs.h:1082 [inline] BUG: KASAN: slab-use-after-free in perf_trace_btrfs_cow_block+0x398/0x780 include/trace/events/btrfs.h:1082 Read of size 8 at addr ffff8880523493c0 by task syz.0.0/5315 CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted 6.13.0-rc1-syzkaller-00036-g5076001689e4 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 do_perf_trace_btrfs_cow_block include/trace/events/btrfs.h:1082 [inline] perf_trace_btrfs_cow_block+0x398/0x780 include/trace/events/btrfs.h:1082 trace_btrfs_cow_block include/trace/events/btrfs.h:1082 [inline] btrfs_cow_block+0x9d9/0xa40 fs/btrfs/ctree.c:757 btrfs_search_slot+0xc01/0x3180 fs/btrfs/ctree.c:2156 btrfs_update_root+0xf6/0xc70 fs/btrfs/root-tree.c:144 btrfs_update_reloc_root+0x904/0xaa0 fs/btrfs/relocation.c:877 insert_dirty_subvol fs/btrfs/relocation.c:1526 [inline] merge_reloc_root+0x1324/0x1ad0 fs/btrfs/relocation.c:1739 merge_reloc_roots+0x3b3/0x980 fs/btrfs/relocation.c:1942 relocate_block_group+0xb0a/0xd40 fs/btrfs/relocation.c:3748 btrfs_relocate_block_group+0x77d/0xd90 fs/btrfs/relocation.c:4081 btrfs_relocate_chunk+0x12c/0x3b0 fs/btrfs/volumes.c:3494 __btrfs_balance+0x1b0f/0x26b0 fs/btrfs/volumes.c:4278 btrfs_balance+0xbdc/0x10c0 fs/btrfs/volumes.c:4655 btrfs_ioctl_balance+0x493/0x7c0 fs/btrfs/ioctl.c:3670 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f8e7eb7ff19 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8e7f948058 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f8e7ed45fa0 RCX: 00007f8e7eb7ff19 RDX: 0000000020000180 RSI: 00000000c4009420 RDI: 0000000000000008 RBP: 00007f8e7ebf3986 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f8e7ed45fa0 R15: 00007ffc68d37678 Allocated by task 5315: 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:319 [inline] __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:345 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 __alloc_extent_buffer+0x33/0x170 fs/btrfs/extent_io.c:2617 alloc_extent_buffer+0x1ad/0x2740 fs/btrfs/extent_io.c:3019 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5019 [inline] btrfs_alloc_tree_block+0x28e/0x1440 fs/btrfs/extent-tree.c:5132 split_leaf+0xd4a/0x1960 fs/btrfs/ctree.c:3820 search_leaf fs/btrfs/ctree.c:2001 [inline] btrfs_search_slot+0x27fb/0x3180 fs/btrfs/ctree.c:2192 btrfs_insert_empty_items fs/btrfs/ctree.c:4354 [inline] btrfs_insert_empty_item fs/btrfs/ctree.h:669 [inline] btrfs_insert_item+0x1a0/0x3b0 fs/btrfs/ctree.c:4383 create_reloc_root+0x60f/0x9a0 fs/btrfs/relocation.c:741 btrfs_init_reloc_root+0x338/0x4f0 fs/btrfs/relocation.c:817 record_root_in_trans+0x2c9/0x360 fs/btrfs/transaction.c:450 btrfs_record_root_in_trans+0x164/0x190 fs/btrfs/transaction.c:496 select_reloc_root+0x27e/0xfd0 fs/btrfs/relocation.c:2101 do_relocation+0x329/0x1a50 fs/btrfs/relocation.c:2326 relocate_tree_block fs/btrfs/relocation.c:2658 [inline] relocate_tree_blocks+0xf34/0x1dd0 fs/btrfs/relocation.c:2712 relocate_block_group+0x755/0xd40 fs/btrfs/relocation.c:3680 btrfs_relocate_block_group+0x77d/0xd90 fs/btrfs/relocation.c:4081 btrfs_relocate_chunk+0x12c/0x3b0 fs/btrfs/volumes.c:3494 __btrfs_balance+0x1b0f/0x26b0 fs/btrfs/volumes.c:4278 btrfs_balance+0xbdc/0x10c0 fs/btrfs/volumes.c:4655 btrfs_ioctl_balance+0x493/0x7c0 fs/btrfs/ioctl.c:3670 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 16: 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:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2338 [inline] slab_free mm/slub.c:4598 [inline] kmem_cache_free+0x195/0x410 mm/slub.c:4700 rcu_do_batch kernel/rcu/tree.c:2567 [inline] rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823 handle_softirqs+0x2d4/0x9b0 kernel/softirq.c:554 run_ksoftirqd+0xca/0x130 kernel/softirq.c:943 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164 kthread+0x2f0/0x390 kernel/kthread.c:389 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 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:544 __call_rcu_common kernel/rcu/tree.c:3086 [inline] call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190 release_extent_buffer+0x206/0x2c0 fs/btrfs/extent_io.c:3230 btrfs_force_cow_block+0xf9c/0x1da0 fs/btrfs/ctree.c:659 btrfs_cow_block+0x35e/0xa40 fs/btrfs/ctree.c:754 btrfs_search_slot+0xc01/0x3180 fs/btrfs/ctree.c:2156 btrfs_update_root+0xf6/0xc70 fs/btrfs/root-tree.c:144 btrfs_update_reloc_root+0x904/0xaa0 fs/btrfs/relocation.c:877 insert_dirty_subvol fs/btrfs/relocation.c:1526 [inline] merge_reloc_root+0x1324/0x1ad0 fs/btrfs/relocation.c:1739 merge_reloc_roots+0x3b3/0x980 fs/btrfs/relocation.c:1942 relocate_block_group+0xb0a/0xd40 fs/btrfs/relocation.c:3748 btrfs_relocate_block_group+0x77d/0xd90 fs/btrfs/relocation.c:4081 btrfs_relocate_chunk+0x12c/0x3b0 fs/btrfs/volumes.c:3494 __btrfs_balance+0x1b0f/0x26b0 fs/btrfs/volumes.c:4278 btrfs_balance+0xbdc/0x10c0 fs/btrfs/volumes.c:4655 btrfs_ioctl_balance+0x493/0x7c0 fs/btrfs/ioctl.c:3670 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff8880523493c0 which belongs to the cache btrfs_extent_buffer of size 416 The buggy address is located 0 bytes inside of freed 416-byte region [ffff8880523493c0, ffff888052349560) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x52349 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 04fff00000000000 ffff888040d28640 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000080008 00000001f5000000 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 0x52c40(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5315, tgid 5314 (syz.0.0), ts 70071004037, free_ts 69946111678 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2265 alloc_slab_page+0x6a/0x140 mm/slub.c:2408 allocate_slab+0x5a/0x2f0 mm/slub.c:2574 new_slab mm/slub.c:2627 [inline] ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3815 __slab_alloc+0x58/0xa0 mm/slub.c:3905 __slab_alloc_node mm/slub.c:3980 [inline] slab_alloc_node mm/slub.c:4141 [inline] kmem_cache_alloc_noprof+0x268/0x380 mm/slub.c:4160 __alloc_extent_buffer+0x33/0x170 fs/btrfs/extent_io.c:2617 alloc_extent_buffer+0x1ad/0x2740 fs/btrfs/extent_io.c:3019 btrfs_init_new_buffer fs/btrfs/extent-tree.c:5019 [inline] btrfs_alloc_tree_block+0x28e/0x1440 fs/btrfs/extent-tree.c:5132 btrfs_force_cow_block+0x526/0x1da0 fs/btrfs/ctree.c:573 btrfs_cow_block+0x35e/0xa40 fs/btrfs/ctree.c:754 btrfs_search_slot+0xc01/0x3180 fs/btrfs/ctree.c:2156 btrfs_insert_empty_items fs/btrfs/ctree.c:4354 [inline] btrfs_insert_empty_item fs/btrfs/ctree.h:669 [inline] btrfs_insert_item+0x1a0/0x3b0 fs/btrfs/ctree.c:4383 page last free pid 5317 tgid 5317 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0xdef/0x1130 mm/page_alloc.c:2657 discard_slab mm/slub.c:2673 [inline] __put_partials+0xeb/0x130 mm/slub.c:3142 put_cpu_partial+0x17c/0x250 mm/slub.c:3217 __slab_free+0x2ea/0x3d0 mm/slub.c:4468 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4104 [inline] slab_alloc_node mm/slub.c:4153 [inline] kmem_cache_alloc_noprof+0x1d9/0x380 mm/slub.c:4160 getname_flags+0xb7/0x540 fs/namei.c:139 do_readlinkat+0xd8/0x3a0 fs/stat.c:561 __do_sys_readlink fs/stat.c:599 [inline] __se_sys_readlink fs/stat.c:596 [inline] __x64_sys_readlink+0x7f/0x90 fs/stat.c:596 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888052349280: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888052349300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888052349380: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb ^ ffff888052349400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888052349480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================