Hello, syzbot found the following issue on: HEAD commit: f03359bca01b Merge tag 'for-6.9-rc6-tag' of git://git.kern.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=177410a8980000 kernel config: https://syzkaller.appspot.com/x/.config?x=3310e643b6ef5d69 dashboard link: https://syzkaller.appspot.com/bug?extid=66b9b74f6520068596a9 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/1b4deeb2639b/disk-f03359bc.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/f3c3d98db8ef/vmlinux-f03359bc.xz kernel image: https://storage.googleapis.com/syzbot-assets/6f79ee1ae20f/bzImage-f03359bc.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+66b9b74f6520068596a9@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: slab-out-of-bounds in get_unaligned_le64 include/asm-generic/unaligned.h:37 [inline] BUG: KASAN: slab-out-of-bounds in bch2_varint_decode_fast+0x1b5/0x1e0 fs/bcachefs/varint.c:114 Read of size 8 at addr ffff888025fc6f7f by task syz-executor.3/19591 CPU: 1 PID: 19591 Comm: syz-executor.3 Not tainted 6.9.0-rc6-syzkaller-00131-gf03359bca01b #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+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 get_unaligned_le64 include/asm-generic/unaligned.h:37 [inline] bch2_varint_decode_fast+0x1b5/0x1e0 fs/bcachefs/varint.c:114 bch2_inode_unpack_v3+0xf3d/0x2060 fs/bcachefs/inode.c:270 bch2_inode_unpack fs/bcachefs/inode.c:323 [inline] __bch2_inode_invalid+0x1a2/0x4d0 fs/bcachefs/inode.c:449 bch2_inode_v3_invalid+0x1f1/0x2e0 fs/bcachefs/inode.c:529 bch2_bkey_val_invalid+0x1cb/0x290 fs/bcachefs/bkey_methods.c:140 bch2_bkey_invalid+0x86/0x90 fs/bcachefs/bkey_methods.c:231 __bch2_trans_commit+0x7ea/0x7880 fs/bcachefs/btree_trans_commit.c:1008 bch2_trans_commit fs/bcachefs/btree_update.h:168 [inline] bch2_extent_update+0x494/0xa40 fs/bcachefs/io_write.c:318 bch2_write_index_default+0x8d7/0xb70 fs/bcachefs/io_write.c:366 __bch2_write_index+0x5ee/0xa60 fs/bcachefs/io_write.c:520 bch2_write_data_inline fs/bcachefs/io_write.c:1538 [inline] bch2_write+0x1113/0x1400 fs/bcachefs/io_write.c:1606 bch2_writepages+0x136/0x200 fs/bcachefs/fs-io-buffered.c:660 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2612 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430 filemap_write_and_wait_range mm/filemap.c:685 [inline] filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:676 bch2_symlink+0x13a/0x200 fs/bcachefs/fs.c:587 vfs_symlink fs/namei.c:4481 [inline] vfs_symlink+0x3e8/0x630 fs/namei.c:4465 do_symlinkat+0x263/0x310 fs/namei.c:4507 __do_sys_symlinkat fs/namei.c:4523 [inline] __se_sys_symlinkat fs/namei.c:4520 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4520 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 RIP: 0033:0x7f8907c7dd29 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f8908a970c8 EFLAGS: 00000246 ORIG_RAX: 000000000000010a RAX: ffffffffffffffda RBX: 00007f8907dabf80 RCX: 00007f8907c7dd29 RDX: 0000000020000340 RSI: 0000000000000005 RDI: 0000000020000440 RBP: 00007f8907cca47e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f8907dabf80 R15: 00007ffd176e7b48 </TASK> Allocated by task 19591: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:3966 [inline] __kmalloc_node_track_caller+0x220/0x470 mm/slub.c:3986 __do_krealloc mm/slab_common.c:1192 [inline] krealloc+0x5d/0x100 mm/slab_common.c:1225 __bch2_trans_kmalloc+0x392/0xbf0 fs/bcachefs/btree_iter.c:2831 bch2_trans_kmalloc_nomemzero fs/bcachefs/btree_iter.h:537 [inline] __bch2_bkey_make_mut_noupdate.constprop.0+0x3c9/0x4e0 fs/bcachefs/btree_update.h:223 __bch2_bkey_get_mut_noupdate fs/bcachefs/btree_update.h:282 [inline] bch2_bkey_get_mut_noupdate fs/bcachefs/btree_update.h:293 [inline] bch2_extent_update_i_size_sectors+0x33d/0x760 fs/bcachefs/io_write.c:219 bch2_extent_update+0x3db/0xa40 fs/bcachefs/io_write.c:314 bch2_write_index_default+0x8d7/0xb70 fs/bcachefs/io_write.c:366 __bch2_write_index+0x5ee/0xa60 fs/bcachefs/io_write.c:520 bch2_write_data_inline fs/bcachefs/io_write.c:1538 [inline] bch2_write+0x1113/0x1400 fs/bcachefs/io_write.c:1606 bch2_writepages+0x136/0x200 fs/bcachefs/fs-io-buffered.c:660 do_writepages+0x1a3/0x7f0 mm/page-writeback.c:2612 filemap_fdatawrite_wbc mm/filemap.c:397 [inline] filemap_fdatawrite_wbc+0x148/0x1c0 mm/filemap.c:387 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:430 filemap_write_and_wait_range mm/filemap.c:685 [inline] filemap_write_and_wait_range+0xa3/0x130 mm/filemap.c:676 bch2_symlink+0x13a/0x200 fs/bcachefs/fs.c:587 vfs_symlink fs/namei.c:4481 [inline] vfs_symlink+0x3e8/0x630 fs/namei.c:4465 do_symlinkat+0x263/0x310 fs/namei.c:4507 __do_sys_symlinkat fs/namei.c:4523 [inline] __se_sys_symlinkat fs/namei.c:4520 [inline] __x64_sys_symlinkat+0x97/0xc0 fs/namei.c:4520 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 The buggy address belongs to the object at ffff888025fc6f00 which belongs to the cache kmalloc-128 of size 128 The buggy address is located 127 bytes inside of allocated 128-byte region [ffff888025fc6f00, ffff888025fc6f80) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x25fc6 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff8880150418c0 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080100010 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 0x12820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY), pid 5098, tgid -1144530164 (syz-executor.3), ts 5098, free_ts 114727813224 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] kmalloc_trace+0x2fb/0x330 mm/slub.c:3992 kmalloc include/linux/slab.h:628 [inline] __hw_addr_create net/core/dev_addr_lists.c:60 [inline] __hw_addr_add_ex+0x3c8/0x7c0 net/core/dev_addr_lists.c:118 __hw_addr_add net/core/dev_addr_lists.c:135 [inline] dev_uc_add+0xb6/0x110 net/core/dev_addr_lists.c:689 vlan_dev_set_mac_address+0x2d4/0x440 net/8021q/vlan_dev.c:344 dev_set_mac_address+0x301/0x4a0 net/core/dev.c:8950 dev_set_mac_address_user+0x30/0x50 net/core/dev.c:8969 do_setlink+0x901/0x3ff0 net/core/rtnetlink.c:2839 __rtnl_newlink+0xc35/0x1960 net/core/rtnetlink.c:3680 rtnl_newlink+0x67/0xa0 net/core/rtnetlink.c:3727 rtnetlink_rcv_msg+0x3c7/0xe60 net/core/rtnetlink.c:6595 page last free pid 5164 tgid 5164 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_folios+0x256/0xad0 mm/page_alloc.c:2536 folios_put_refs+0x487/0x6d0 mm/swap.c:1034 free_pages_and_swap_cache+0x262/0x4b0 mm/swap_state.c:329 __tlb_batch_free_encoded_pages+0xf9/0x290 mm/mmu_gather.c:136 tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] tlb_flush_mmu mm/mmu_gather.c:373 [inline] tlb_finish_mmu+0x168/0x7b0 mm/mmu_gather.c:465 exit_mmap+0x3da/0xb90 mm/mmap.c:3280 __mmput+0x12a/0x4d0 kernel/fork.c:1346 mmput+0x62/0x70 kernel/fork.c:1368 exit_mm kernel/exit.c:569 [inline] do_exit+0x999/0x2c10 kernel/exit.c:865 do_group_exit+0xd3/0x2a0 kernel/exit.c:1027 __do_sys_exit_group kernel/exit.c:1038 [inline] __se_sys_exit_group kernel/exit.c:1036 [inline] __x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036 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 Memory state around the buggy address: ffff888025fc6e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888025fc6f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888025fc6f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888025fc7000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888025fc7080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- 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 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
