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) ================================================================== BUG: KASAN: slab-out-of-bounds in btrfs_dev_replace_by_ioctl+0x1dc5/0x2010 fs/btrfs/dev-replace.c:744 Read of size 1 at addr ffff888021b2a421 by task syz-executor.0/5480 CPU: 1 PID: 5480 Comm: syz-executor.0 Not tainted 6.7.0-rc5-syzkaller-00200-g3bd7d7488169-dirty #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0x163/0x540 mm/kasan/report.c:475 kasan_report+0x142/0x170 mm/kasan/report.c:588 btrfs_dev_replace_by_ioctl+0x1dc5/0x2010 fs/btrfs/dev-replace.c:744 btrfs_ioctl_dev_replace+0x2c9/0x390 fs/btrfs/ioctl.c:3299 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b RIP: 0033:0x7f695d67cba9 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:00007f695e45a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f695d79bf80 RCX: 00007f695d67cba9 RDX: 0000000020000540 RSI: 00000000ca289435 RDI: 0000000000000005 RBP: 00007f695d6c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f695d79bf80 R15: 00007ffe9e2e6458 Allocated by task 5480: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4f/0x70 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:198 [inline] __do_kmalloc_node mm/slab_common.c:1007 [inline] __kmalloc_node_track_caller+0xb1/0x190 mm/slab_common.c:1027 memdup_user+0x2b/0xc0 mm/util.c:197 btrfs_ioctl_dev_replace+0xb8/0x390 fs/btrfs/ioctl.c:3286 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:871 [inline] __se_sys_ioctl+0xf8/0x170 fs/ioctl.c:857 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b The buggy address belongs to the object at ffff888021b2a000 which belongs to the cache kmalloc-2k of size 2048 The buggy address is located 15 bytes to the right of allocated 1042-byte region [ffff888021b2a000, ffff888021b2a412) The buggy address belongs to the physical page: page:ffffea000086ca00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x21b28 head:ffffea000086ca00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000840(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000840 ffff888012c42000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000080080008 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 4502, tgid 4502 (klogd), ts 85479727402, free_ts 85422702099 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x1e6/0x210 mm/page_alloc.c:1537 prep_new_page mm/page_alloc.c:1544 [inline] get_page_from_freelist+0x33ea/0x3570 mm/page_alloc.c:3312 __alloc_pages+0x255/0x680 mm/page_alloc.c:4568 alloc_pages_mpol+0x3de/0x640 mm/mempolicy.c:2133 alloc_slab_page+0x6a/0x170 mm/slub.c:1870 allocate_slab mm/slub.c:2017 [inline] new_slab+0x84/0x2f0 mm/slub.c:2070 ___slab_alloc+0xc8a/0x1330 mm/slub.c:3223 __slab_alloc mm/slub.c:3322 [inline] __slab_alloc_node mm/slub.c:3375 [inline] slab_alloc_node mm/slub.c:3468 [inline] __kmem_cache_alloc_node+0x21d/0x300 mm/slub.c:3517 kmalloc_trace+0x2a/0x60 mm/slab_common.c:1098 kmalloc include/linux/slab.h:600 [inline] syslog_print+0x121/0x9b0 kernel/printk/printk.c:1550 do_syslog+0x505/0x890 kernel/printk/printk.c:1728 __do_sys_syslog kernel/printk/printk.c:1820 [inline] __se_sys_syslog kernel/printk/printk.c:1818 [inline] __x64_sys_syslog+0x7c/0x90 kernel/printk/printk.c:1818 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x63/0x6b page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1137 [inline] free_unref_page_prepare+0x931/0xa60 mm/page_alloc.c:2347 free_unref_page+0x37/0x3f0 mm/page_alloc.c:2487 discard_slab mm/slub.c:2116 [inline] __unfreeze_partials+0x1e0/0x220 mm/slub.c:2655 put_cpu_partial+0x17b/0x250 mm/slub.c:2731 __slab_free+0x2b6/0x390 mm/slub.c:3679 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x75/0xe0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x14b/0x160 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x23/0x70 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:188 [inline] slab_post_alloc_hook+0x6c/0x3c0 mm/slab.h:763 slab_alloc_node mm/slub.c:3478 [inline] slab_alloc mm/slub.c:3486 [inline] __kmem_cache_alloc_lru mm/slub.c:3493 [inline] kmem_cache_alloc+0x19e/0x2b0 mm/slub.c:3502 alloc_reserved_tree_block fs/btrfs/extent-tree.c:4876 [inline] run_delayed_tree_ref fs/btrfs/extent-tree.c:1765 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1799 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2064 [inline] __btrfs_run_delayed_refs+0x14af/0x46c0 fs/btrfs/extent-tree.c:2134 btrfs_run_delayed_refs+0x188/0x2c0 fs/btrfs/extent-tree.c:2246 commit_cowonly_roots+0x66b/0x860 fs/btrfs/transaction.c:1416 btrfs_commit_transaction+0xff5/0x3740 fs/btrfs/transaction.c:2485 btrfs_rebuild_free_space_tree+0x1de/0x370 fs/btrfs/free-space-tree.c:1344 btrfs_start_pre_rw_mount+0xef3/0x1340 fs/btrfs/disk-io.c:2965 Memory state around the buggy address: ffff888021b2a300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888021b2a380: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff888021b2a400: 00 00 02 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888021b2a480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888021b2a500: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================