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

Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.14	KASAN: slab-out-of-bounds Read in dbAllocDmapLev jfs	C			1	412d	476d	0/1	upstream: reported C repro on 2022/12/30 09:33
upstream	UBSAN: array-index-out-of-bounds in dbAllocDmapLev jfs	C	error		2	310d	483d	23/26	fixed on 2023/10/12 12:48

================================================================== BUG: KASAN: slab-out-of-bounds in dbAllocDmapLev+0x2e0/0x330 fs/jfs/jfs_dmap.c:2022 Read of size 1 at addr ffff888098d36fcd by task syz-executor110/8115 CPU: 0 PID: 8115 Comm: syz-executor110 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_address_description.cold+0x54/0x219 mm/kasan/report.c:256 kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354 kasan_report mm/kasan/report.c:412 [inline] __asan_report_load1_noabort+0x88/0x90 mm/kasan/report.c:430 dbAllocDmapLev+0x2e0/0x330 fs/jfs/jfs_dmap.c:2022 dbAllocCtl+0x4a2/0x700 fs/jfs/jfs_dmap.c:1866 dbAllocAG+0x7d1/0xb90 fs/jfs/jfs_dmap.c:1407 dbAlloc+0x472/0xb00 fs/jfs/jfs_dmap.c:863 dtSplitUp+0x365/0x4e70 fs/jfs/jfs_dtree.c:987 dtInsert+0x7fd/0xa00 fs/jfs/jfs_dtree.c:876 jfs_create.part.0+0x3c6/0x880 fs/jfs/namei.c:150 jfs_create+0x3f/0x60 fs/jfs/namei.c:90 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f2e9a3f87e9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcf416d9b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f2e9a3f87e9 RDX: 000000000000275a RSI: 0000000020000040 RDI: 00000000ffffff9c RBP: 00007f2e9a3b8080 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2e9a3b8110 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Allocated by task 8091: kmem_cache_alloc+0x122/0x370 mm/slab.c:3559 skb_clone+0x151/0x3d0 net/core/skbuff.c:1293 dev_queue_xmit_nit+0x326/0xa20 net/core/dev.c:2018 xmit_one net/core/dev.c:3252 [inline] dev_hard_start_xmit+0xaa/0x920 net/core/dev.c:3272 sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:395 [inline] __qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:3451 [inline] __dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 __tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3643 __tcp_send_ack net/ipv4/tcp_output.c:3649 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3649 tcp_cleanup_rbuf+0x30f/0x600 net/ipv4/tcp.c:1604 tcp_recvmsg+0xa8c/0x2a90 net/ipv4/tcp.c:2177 inet_recvmsg+0x124/0x5c0 net/ipv4/af_inet.c:830 sock_recvmsg_nosec net/socket.c:859 [inline] sock_recvmsg net/socket.c:866 [inline] sock_recvmsg net/socket.c:862 [inline] sock_read_iter+0x339/0x470 net/socket.c:944 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 8091: __cache_free mm/slab.c:3503 [inline] kmem_cache_free+0x7f/0x260 mm/slab.c:3765 kfree_skbmem+0xc1/0x140 net/core/skbuff.c:595 __kfree_skb net/core/skbuff.c:655 [inline] consume_skb+0x120/0x3d0 net/core/skbuff.c:714 packet_rcv+0xea/0x1490 net/packet/af_packet.c:2148 dev_queue_xmit_nit+0x756/0xa20 net/core/dev.c:2050 xmit_one net/core/dev.c:3252 [inline] dev_hard_start_xmit+0xaa/0x920 net/core/dev.c:3272 sch_direct_xmit+0x2d6/0xf70 net/sched/sch_generic.c:332 qdisc_restart net/sched/sch_generic.c:395 [inline] __qdisc_run+0x4d0/0x1640 net/sched/sch_generic.c:403 qdisc_run include/net/pkt_sched.h:120 [inline] __dev_xmit_skb net/core/dev.c:3451 [inline] __dev_queue_xmit+0x2102/0x2e00 net/core/dev.c:3807 neigh_hh_output include/net/neighbour.h:491 [inline] neigh_output include/net/neighbour.h:499 [inline] ip_finish_output2+0xb6d/0x15a0 net/ipv4/ip_output.c:230 ip_finish_output+0xae9/0x10b0 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:278 [inline] ip_output+0x203/0x5f0 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:455 [inline] ip_local_out+0xaf/0x170 net/ipv4/ip_output.c:125 __ip_queue_xmit+0x91e/0x1c10 net/ipv4/ip_output.c:507 __tcp_transmit_skb+0x1b9c/0x3400 net/ipv4/tcp_output.c:1148 __tcp_send_ack.part.0+0x3d9/0x5c0 net/ipv4/tcp_output.c:3643 __tcp_send_ack net/ipv4/tcp_output.c:3649 [inline] tcp_send_ack+0x7d/0xa0 net/ipv4/tcp_output.c:3649 tcp_cleanup_rbuf+0x30f/0x600 net/ipv4/tcp.c:1604 tcp_recvmsg+0xa8c/0x2a90 net/ipv4/tcp.c:2177 inet_recvmsg+0x124/0x5c0 net/ipv4/af_inet.c:830 sock_recvmsg_nosec net/socket.c:859 [inline] sock_recvmsg net/socket.c:866 [inline] sock_recvmsg net/socket.c:862 [inline] sock_read_iter+0x339/0x470 net/socket.c:944 call_read_iter include/linux/fs.h:1815 [inline] new_sync_read fs/read_write.c:406 [inline] __vfs_read+0x518/0x750 fs/read_write.c:418 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe The buggy address belongs to the object at ffff888098d36e40 which belongs to the cache skbuff_head_cache of size 232 The buggy address is located 165 bytes to the right of 232-byte region [ffff888098d36e40, ffff888098d36f28) The buggy address belongs to the page: page:ffffea0002634d80 count:1 mapcount:0 mapping:ffff8880b5b96900 index:0x0 flags: 0xfff00000000100(slab) raw: 00fff00000000100 ffffea0002ab7c08 ffffea0002821ec8 ffff8880b5b96900 raw: 0000000000000000 ffff888098d36080 000000010000000c 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888098d36e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888098d36f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc >ffff888098d36f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888098d37000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888098d37080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2023/01/02 11:37	linux-4.19.y	3f8a27f9e27b	ab32d508	.config	console log	report	syz	C		[disk image] [vmlinux] [mounted in repro]	ci2-linux-4-19	KASAN: slab-out-of-bounds Read in dbAllocDmapLev

Crashes (1):

Assets (help?)