KASAN: use-after-free Read in diAlloc

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	KASAN: use-after-free Read in diAlloc	C		error	3	206d	250d	0/1	upstream: reported C repro on 2022/10/02 23:41
upstream	UBSAN: array-index-out-of-bounds in diAlloc jfs	C	error	inconclusive	35	57d	256d	0/24	upstream: reported C repro on 2022/09/27 11:45

linux-4.19

error

206d

250d

0/1

upstream: reported C repro on 2022/10/02 23:41

upstream

UBSAN: array-index-out-of-bounds in diAlloc jfs

error

inconclusive

57d

256d

0/24

upstream: reported C repro on 2022/09/27 11:45


Created	Duration	User	Repo	Result
2023/02/25 21:24	25m	bisect fix	linux-4.14.y	job log (0) log
2023/01/25 11:35	23m	bisect fix	linux-4.14.y	job log (0) log
2022/11/13 20:49	26m	bisect fix	linux-4.14.y	job log (0) log

================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:185 [inline] BUG: KASAN: use-after-free in atomic_read arch/x86/include/asm/atomic.h:27 [inline] BUG: KASAN: use-after-free in diAlloc+0xe7e/0x1230 fs/jfs/jfs_imap.c:1380 Read of size 4 at addr ffff8880b305e90c by task syz-executor178/7979 CPU: 0 PID: 7979 Comm: syz-executor178 Not tainted 4.14.295-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252 kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351 kasan_report mm/kasan/report.c:409 [inline] __asan_report_load4_noabort+0x68/0x70 mm/kasan/report.c:429 __read_once_size include/linux/compiler.h:185 [inline] atomic_read arch/x86/include/asm/atomic.h:27 [inline] diAlloc+0xe7e/0x1230 fs/jfs/jfs_imap.c:1380 ialloc+0x7b/0x940 fs/jfs/jfs_inode.c:70 jfs_create.part.0+0xf7/0x800 fs/jfs/namei.c:105 jfs_create+0x35/0x50 fs/jfs/namei.c:90 lookup_open+0x77a/0x1750 fs/namei.c:3241 do_last fs/namei.c:3334 [inline] path_openat+0xe08/0x2970 fs/namei.c:3571 do_filp_open+0x179/0x3c0 fs/namei.c:3605 do_sys_open+0x296/0x410 fs/open.c:1081 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7f04dea49eb9 RSP: 002b:00007ffdbf2222c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f04dea49eb9 RDX: 0000000000000000 RSI: 0000000000141042 RDI: 0000000020000200 RBP: 00007f04dea09720 R08: 00005555572832c0 R09: 0000000000000000 R10: 00007ffdbf222190 R11: 0000000000000246 R12: 0000000200000004 R13: 0000000000000000 R14: 00080000000000f8 R15: 0000000000000000 Allocated by task 6249: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551 kmem_cache_alloc+0x124/0x3c0 mm/slab.c:3552 skb_clone+0x126/0x9a0 net/core/skbuff.c:1291 do_one_broadcast net/netlink/af_netlink.c:1421 [inline] netlink_broadcast_filtered+0x815/0x9e0 net/netlink/af_netlink.c:1496 netlink_broadcast net/netlink/af_netlink.c:1520 [inline] netlink_sendmsg+0x9fd/0xbc0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb Freed by task 6249: save_stack mm/kasan/kasan.c:447 [inline] set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0xc3/0x1a0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kmem_cache_free+0x7c/0x2b0 mm/slab.c:3758 kfree_skbmem+0x98/0x100 net/core/skbuff.c:595 __kfree_skb net/core/skbuff.c:655 [inline] kfree_skb+0xf4/0x390 net/core/skbuff.c:672 do_one_broadcast net/netlink/af_netlink.c:1445 [inline] netlink_broadcast_filtered+0x575/0x9e0 net/netlink/af_netlink.c:1496 netlink_broadcast net/netlink/af_netlink.c:1520 [inline] netlink_sendmsg+0x9fd/0xbc0 net/netlink/af_netlink.c:1891 sock_sendmsg_nosec net/socket.c:646 [inline] sock_sendmsg+0xb5/0x100 net/socket.c:656 ___sys_sendmsg+0x6c8/0x800 net/socket.c:2062 __sys_sendmsg+0xa3/0x120 net/socket.c:2096 SYSC_sendmsg net/socket.c:2107 [inline] SyS_sendmsg+0x27/0x40 net/socket.c:2103 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb The buggy address belongs to the object at ffff8880b305e8c0 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 76 bytes inside of 232-byte region [ffff8880b305e8c0, ffff8880b305e9a8) The buggy address belongs to the page: page:ffffea0002cc1780 count:1 mapcount:0 mapping:ffff8880b305e000 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffff8880b305e000 0000000000000000 000000010000000c raw: ffffea00026e78a0 ffffea00026ed360 ffff8880b5538900 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8880b305e800: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc ffff8880b305e880: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb >ffff8880b305e900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8880b305e980: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc ffff8880b305ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================

Crashes (2):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets	Manager	Title
2022/10/03 09:45	linux-4.14.y	9d5c0b3a8e1a	feb56351	.config	console log	report	syz	C		[disk image] [vmlinux]	ci2-linux-4-14	KASAN: use-after-free Read in diAlloc
2022/10/14 20:48	linux-4.14.y	9d5c0b3a8e1a	4954e4b2	.config	console log	report	syz	C		[disk image] [vmlinux] [mounted in repro]	ci2-linux-4-14	BUG: unable to handle kernel paging request in diAlloc

Crashes (2):