KASAN: slab-out-of-bounds Read in btrfs_qgroup

Title	Replies (including bot)	Last reply
Re: [PATCH] btrfs: qgroup: fix slab-out-of-bounds in btrfs_qgroup_inherit	1 (1)	2024/06/24 06:41
[PATCH] btrfs: qgroup: fix slab-out-of-bounds in btrfs_qgroup_inherit	3 (3)	2024/06/24 05:40
[syzbot] [btrfs?] KASAN: slab-out-of-bounds Read in btrfs_qgroup_inherit	0 (1)	2024/06/08 21:42

Created	Duration	User	Patch	Repo	Result
2024/06/20 18:29	14m	retest repro		upstream	error

Created

Duration

User

Patch

Repo

Result

2024/06/20 18:29

14m

retest repro

upstream

error

================================================================== BUG: KASAN: slab-out-of-bounds in btrfs_qgroup_inherit+0x42e/0x2e20 fs/btrfs/qgroup.c:3277 Read of size 8 at addr ffff88814628ca50 by task syz-executor318/5171 CPU: 0 PID: 5171 Comm: syz-executor318 Not tainted 6.10.0-rc2-syzkaller-00010-g2ab795141095 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024 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 btrfs_qgroup_inherit+0x42e/0x2e20 fs/btrfs/qgroup.c:3277 create_pending_snapshot+0x1359/0x29b0 fs/btrfs/transaction.c:1854 create_pending_snapshots+0x195/0x1d0 fs/btrfs/transaction.c:1922 btrfs_commit_transaction+0xf20/0x3740 fs/btrfs/transaction.c:2382 create_snapshot+0x6a1/0x9e0 fs/btrfs/ioctl.c:875 btrfs_mksubvol+0x58f/0x710 fs/btrfs/ioctl.c:1029 btrfs_mksnapshot+0xb5/0xf0 fs/btrfs/ioctl.c:1075 __btrfs_ioctl_snap_create+0x387/0x4b0 fs/btrfs/ioctl.c:1340 btrfs_ioctl_snap_create_v2+0x1f2/0x3a0 fs/btrfs/ioctl.c:1422 btrfs_ioctl+0x99e/0xc60 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 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: 0033:0x7fcbf1992509 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 81 18 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:00007fcbf1928218 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007fcbf1a1f618 RCX: 00007fcbf1992509 RDX: 0000000020000280 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 00007fcbf1a1f610 R08: 00007ffea1298e97 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcbf19eb660 R13: 00000000200002b8 R14: 00007fcbf19e60c0 R15: 0030656c69662f2e </TASK> Allocated by task 5171: kasan_save_stack mm/kasan/common.c:47 [inline] kasan_save_track+0x3f/0x80 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:370 [inline] __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:387 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slub.c:4121 [inline] kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4141 memdup_user+0x2b/0xc0 mm/util.c:214 btrfs_ioctl_snap_create_v2+0x2fd/0x3a0 fs/btrfs/ioctl.c:1411 btrfs_ioctl+0x99e/0xc60 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:907 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:893 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 ffff88814628ca00 which belongs to the cache kmalloc-96 of size 96 The buggy address is located 0 bytes to the right of allocated 80-byte region [ffff88814628ca00, ffff88814628ca50) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14628c flags: 0x57ff00000000000(node=1|zone=2|lastcpupid=0x7ff) page_type: 0xffffefff(slab) raw: 057ff00000000000 ffff888015041280 dead000000000100 dead000000000122 raw: 0000000000000000 0000000080200020 00000001ffffefff 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 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 1, tgid 1 (swapper/0), ts 7530129564, free_ts 7138110092 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+0x2e2d/0x2ee0 mm/page_alloc.c:3402 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4660 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline] alloc_pages_node_noprof include/linux/gfp.h:296 [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] kmalloc_node_trace_noprof+0x20c/0x300 mm/slub.c:4160 kmalloc_node_noprof include/linux/slab.h:677 [inline] alloc_node_nr_active kernel/workqueue.c:4833 [inline] alloc_workqueue+0x847/0x2060 kernel/workqueue.c:5713 nvmet_init+0x8d/0x150 drivers/nvme/target/core.c:1698 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 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+0xd19/0xea0 mm/page_alloc.c:2565 vfree+0x186/0x2e0 mm/vmalloc.c:3346 free_partitions block/partitions/core.c:110 [inline] check_partition block/partitions/core.c:169 [inline] blk_add_partitions block/partitions/core.c:579 [inline] bdev_disk_changed+0x80e/0x13d0 block/partitions/core.c:683 blkdev_get_whole+0x315/0x470 block/bdev.c:700 bdev_open+0x2e9/0xc60 block/bdev.c:909 bdev_file_open_by_dev+0x1b0/0x230 block/bdev.c:1011 disk_scan_partitions+0x1be/0x2b0 block/genhd.c:367 device_add_disk+0xca0/0xf90 block/genhd.c:510 add_disk include/linux/blkdev.h:715 [inline] brd_alloc+0x503/0x770 drivers/block/brd.c:373 brd_init+0xfd/0x1d0 drivers/block/brd.c:435 do_one_initcall+0x248/0x880 init/main.c:1267 do_initcall_level+0x157/0x210 init/main.c:1329 do_initcalls+0x3f/0x80 init/main.c:1345 kernel_init_freeable+0x435/0x5d0 init/main.c:1578 kernel_init+0x1d/0x2b0 init/main.c:1467 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 Memory state around the buggy address: ffff88814628c900: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88814628c980: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc >ffff88814628ca00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ^ ffff88814628ca80: fa fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc ffff88814628cb00: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/06/04 22:29	upstream	2ab795141095	11f2afa5	.config	strace log	report	syz / log	C		[disk image] [vmlinux] [kernel image] [mounted in repro]	ci2-upstream-fs	KASAN: slab-out-of-bounds Read in btrfs_qgroup_inherit
2024/06/04 21:35	upstream	2ab795141095	11f2afa5	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci2-upstream-fs	KASAN: slab-out-of-bounds Read in btrfs_qgroup_inherit

Crashes (2):

Assets (help?)