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+0xb6/0x2010 fs/btrfs/dev-replace.c:735 Read of size 8 at addr ffff8880239268d8 by task syz-executor.0/5475 CPU: 1 PID: 5475 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+0xb6/0x2010 fs/btrfs/dev-replace.c:735 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: 0033:0x7ff58447cba9 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:00007ff5852580c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007ff58459bf80 RCX: 00007ff58447cba9 RDX: 0000000020000540 RSI: 00000000ca289435 RDI: 0000000000000005 RBP: 00007ff5844c847a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007ff58459bf80 R15: 00007fff749803c8 Allocated by task 5475: 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 ffff8880239268c0 which belongs to the cache kmalloc-32 of size 32 The buggy address is located 7 bytes to the right of allocated 17-byte region [ffff8880239268c0, ffff8880239268d1) The buggy address belongs to the physical page: page:ffffea00008e4980 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x23926 flags: 0xfff00000000800(slab|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000000800 ffff888012c41500 ffffea000099dd40 dead000000000002 raw: 0000000000000000 0000000080400040 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 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 11104550106, free_ts 11081252843 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 __do_kmalloc_node mm/slab_common.c:1006 [inline] __kmalloc_node_track_caller+0xa0/0x190 mm/slab_common.c:1027 kvasprintf+0xdf/0x190 lib/kasprintf.c:25 __kthread_create_on_node+0x1a9/0x3c0 kernel/kthread.c:444 kthread_create_on_node+0xde/0x120 kernel/kthread.c:512 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1927 [inline] vivid_probe+0x5422/0x6fa0 drivers/media/test-drivers/vivid/vivid-core.c:2004 platform_probe+0x135/0x1b0 drivers/base/platform.c:1404 really_probe+0x294/0xc30 drivers/base/dd.c:658 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:800 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 mm_free_pgd kernel/fork.c:803 [inline] __mmdrop+0xb8/0x3d0 kernel/fork.c:919 free_bprm+0x144/0x330 fs/exec.c:1490 kernel_execve+0x8f7/0xa20 fs/exec.c:2024 call_usermodehelper_exec_async+0x233/0x370 kernel/umh.c:110 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242 Memory state around the buggy address: ffff888023926780: 00 00 00 00 fc fc fc fc 00 00 00 00 fc fc fc fc ffff888023926800: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc >ffff888023926880: fb fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc ^ ffff888023926900: 00 00 03 fc fc fc fc fc 00 00 00 fc fc fc fc fc ffff888023926980: fb fb fb fb fc fc fc fc fb fb fb fb fc fc fc fc ==================================================================