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KASAN: slab-out-of-bounds Read in udf_get_filelongad (2)

Status: upstream: reported C repro on 2024/09/03 09:55
Subsystems: udf
[Documentation on labels]
Reported-by: syzbot+7a4842f0b1801230a989@syzkaller.appspotmail.com
Fix commit: c226964ec786 udf: refactor inode_bmap() to handle error
Patched on: [ci-qemu-gce-upstream-auto ci-qemu-native-arm64-kvm ci-qemu-upstream ci-qemu-upstream-386 ci-qemu2-arm32 ci-qemu2-arm64 ci-qemu2-arm64-compat ci-qemu2-arm64-mte ci-snapshot-upstream-root ci-upstream-bpf-kasan-gce ci-upstream-bpf-next-kasan-gce ci-upstream-gce-arm64 ci-upstream-gce-leak ci-upstream-kasan-badwrites-root ci-upstream-kasan-gce ci-upstream-kasan-gce-386 ci-upstream-kasan-gce-root ci-upstream-kasan-gce-selinux-root ci-upstream-kasan-gce-smack-root ci-upstream-kmsan-gce-386-root ci-upstream-kmsan-gce-root ci-upstream-linux-next-kasan-gce-root ci-upstream-net-kasan-gce ci-upstream-net-this-kasan-gce ci2-upstream-fs ci2-upstream-kcsan-gce ci2-upstream-usb], missing on: [ci-qemu2-riscv64]
First crash: 61d, last: 47d
▶ ▼ Discussions (6)
Title Replies (including bot) Last reply
[PATCH AUTOSEL 6.11 10/16] udf: refactor inode_bmap() to handle error 1 (1) 2024/10/12 11:26
[PATCH v3 3/3] udf: refactor inode_bmap() to handle error 1 (1) 2024/10/01 11:54
[syzbot] [udf?] KASAN: slab-out-of-bounds Read in udf_get_filelongad (2) 4 (10) 2024/10/01 00:18
[PATCH v2 3/3] udf: refactor inode_bmap() to handle error 2 (2) 2024/09/27 12:09
[PATCH 3/3] udf: refactor inode_bmap() to handle error 2 (2) 2024/09/20 16:00
[PATCH v1] udf: return EIO when ftrunctate access beyond end of device 3 (3) 2024/09/12 12:44
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-out-of-bounds Read in udf_get_filelongad udf C 2 692d 692d 22/28 fixed on 2023/06/08 14:41
linux-4.14 KASAN: use-after-free Read in udf_get_filelongad C 2 612d 701d 0/1 upstream: reported C repro on 2022/12/03 02:46
linux-4.19 KASAN: use-after-free Read in udf_get_filelongad C error 2 705d 708d 0/1 upstream: reported C repro on 2022/11/26 07:38
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2024/09/30 23:55 21m zhaomzhao@126.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 67784a74e258 OK log
2024/09/26 11:41 20m zhaomzhao@126.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 67784a74e258 OK log
2024/09/18 08:54 19m zhaomzhao@126.com patch git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 67784a74e258 OK log
2024/09/17 05:57 14m retest repro upstream report log
2024/09/17 05:57 14m retest repro upstream report log
2024/09/17 05:57 14m retest repro upstream report log
2024/09/11 09:44 19m zhaomengmeng@kylinos.cn patch upstream OK log
2024/09/10 07:28 14m zhaomengmeng@kylinos.cn patch upstream report log

Sample crash report:
loop0: rw=0, sector=117, nr_sectors = 1 limit=0
syz-executor135: attempt to access beyond end of device
loop0: rw=0, sector=117, nr_sectors = 1 limit=0
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_get_filelongad+0x167/0x1b0 fs/udf/directory.c:526
Read of size 4 at addr ffff888012113f30 by task syz-executor135/5106

CPU: 0 UID: 0 PID: 5106 Comm: syz-executor135 Not tainted 6.11.0-rc6-syzkaller-00019-g67784a74e258 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:93 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119
 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
 udf_get_filelongad+0x167/0x1b0 fs/udf/directory.c:526
 udf_current_aext+0x435/0x9e0 fs/udf/inode.c:2235
 udf_next_aext+0x8c/0x4a0 fs/udf/inode.c:2171
 udf_extend_file fs/udf/inode.c:677 [inline]
 udf_setsize+0xa8a/0x1280 fs/udf/inode.c:1265
 udf_setattr+0x3c7/0x5d0 fs/udf/file.c:236
 notify_change+0xbca/0xe90 fs/attr.c:503
 do_truncate fs/open.c:65 [inline]
 do_ftruncate+0x46b/0x590 fs/open.c:181
 do_sys_ftruncate fs/open.c:199 [inline]
 __do_sys_ftruncate fs/open.c:207 [inline]
 __se_sys_ftruncate fs/open.c:205 [inline]
 __x64_sys_ftruncate+0x95/0xf0 fs/open.c:205
 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: 0033:0x7f13639ac249
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff0302d508 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f13639ac249
RDX: 00007f13639ac249 RSI: 0000008002007ffb RDI: 0000000000000005
RBP: 00000000000013f1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff0302d550
R13: 00007fff0302d630 R14: 431bde82d7b634db R15: 00007f13639f501d
 </TASK>

Allocated by task 5061:
 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:4158 [inline]
 __kmalloc_node_track_caller_noprof+0x225/0x440 mm/slub.c:4177
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605
 pskb_expand_head+0x202/0x1390 net/core/skbuff.c:2259
 __skb_pad+0x329/0x5c0 net/core/skbuff.c:2537
 __skb_put_padto include/linux/skbuff.h:3720 [inline]
 skb_put_padto include/linux/skbuff.h:3739 [inline]
 eth_skb_pad include/linux/etherdevice.h:656 [inline]
 e1000_xmit_frame+0x3938/0x5130 drivers/net/ethernet/intel/e1000/e1000_main.c:3123
 __netdev_start_xmit include/linux/netdevice.h:4913 [inline]
 netdev_start_xmit include/linux/netdevice.h:4922 [inline]
 xmit_one net/core/dev.c:3580 [inline]
 dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596
 sch_direct_xmit+0x2b6/0x5f0 net/sched/sch_generic.c:343
 __dev_xmit_skb net/core/dev.c:3809 [inline]
 __dev_queue_xmit+0x1a7f/0x3e90 net/core/dev.c:4389
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:535
 __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
 tcp_cleanup_rbuf net/ipv4/tcp.c:1513 [inline]
 tcp_recvmsg_locked+0x1d00/0x2640 net/ipv4/tcp.c:2563
 tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2593
 inet_recvmsg+0x150/0x2d0 net/ipv4/af_inet.c:885
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg+0x1ae/0x280 net/socket.c:1068
 sock_read_iter+0x2ca/0x3e0 net/socket.c:1138
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x9bd/0xbc0 fs/read_write.c:476
 ksys_read+0x1a0/0x2c0 fs/read_write.c:619
 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

Freed by task 5061:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2252 [inline]
 slab_free mm/slub.c:4473 [inline]
 kfree+0x149/0x360 mm/slub.c:4594
 skb_kfree_head net/core/skbuff.c:1084 [inline]
 skb_free_head net/core/skbuff.c:1096 [inline]
 skb_release_data+0x676/0x880 net/core/skbuff.c:1123
 skb_release_all net/core/skbuff.c:1188 [inline]
 napi_consume_skb+0x146/0x1f0 net/core/skbuff.c:1508
 e1000_unmap_and_free_tx_resource drivers/net/ethernet/intel/e1000/e1000_main.c:1967 [inline]
 e1000_clean_tx_irq drivers/net/ethernet/intel/e1000/e1000_main.c:3857 [inline]
 e1000_clean+0x518/0x3ec0 drivers/net/ethernet/intel/e1000/e1000_main.c:3798
 __napi_poll+0xcb/0x490 net/core/dev.c:6772
 napi_poll net/core/dev.c:6841 [inline]
 net_rx_action+0x89b/0x1240 net/core/dev.c:6963
 handle_softirqs+0x2c4/0x970 kernel/softirq.c:554
 do_softirq+0x11b/0x1e0 kernel/softirq.c:455
 __local_bh_enable_ip+0x1bb/0x200 kernel/softirq.c:382
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 rcu_read_unlock_bh include/linux/rcupdate.h:908 [inline]
 __dev_queue_xmit+0x1763/0x3e90 net/core/dev.c:4450
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
 ip_local_out net/ipv4/ip_output.c:129 [inline]
 __ip_queue_xmit+0x118c/0x1b80 net/ipv4/ip_output.c:535
 __tcp_transmit_skb+0x2544/0x3b30 net/ipv4/tcp_output.c:1466
 tcp_cleanup_rbuf net/ipv4/tcp.c:1513 [inline]
 tcp_recvmsg_locked+0x1d00/0x2640 net/ipv4/tcp.c:2563
 tcp_recvmsg+0x25d/0x920 net/ipv4/tcp.c:2593
 inet_recvmsg+0x150/0x2d0 net/ipv4/af_inet.c:885
 sock_recvmsg_nosec net/socket.c:1046 [inline]
 sock_recvmsg+0x1ae/0x280 net/socket.c:1068
 sock_read_iter+0x2ca/0x3e0 net/socket.c:1138
 new_sync_read fs/read_write.c:395 [inline]
 vfs_read+0x9bd/0xbc0 fs/read_write.c:476
 ksys_read+0x1a0/0x2c0 fs/read_write.c:619
 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 ffff888012113800
 which belongs to the cache kmalloc-1k of size 1024
The buggy address is located 816 bytes to the right of
 allocated 1024-byte region [ffff888012113800, ffff888012113c00)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12110
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000040 ffff88801ac41dc0 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000
head: 00fff00000000040 ffff88801ac41dc0 dead000000000122 0000000000000000
head: 0000000000000000 0000000000080008 00000001fdffffff 0000000000000000
head: 00fff00000000002 ffffea0000484401 ffffffffffffffff 0000000000000000
head: ffff888000000004 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd2820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5061, tgid 5061 (sshd), ts 83597267288, free_ts 71025249904
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1493
 prep_new_page mm/page_alloc.c:1501 [inline]
 get_page_from_freelist+0x2e4c/0x2f10 mm/page_alloc.c:3439
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4695
 __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:2321
 allocate_slab+0x5a/0x2f0 mm/slub.c:2484
 new_slab mm/slub.c:2537 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3723
 __slab_alloc+0x58/0xa0 mm/slub.c:3813
 __slab_alloc_node mm/slub.c:3866 [inline]
 slab_alloc_node mm/slub.c:4025 [inline]
 __do_kmalloc_node mm/slub.c:4157 [inline]
 __kmalloc_node_track_caller_noprof+0x281/0x440 mm/slub.c:4177
 kmalloc_reserve+0x111/0x2a0 net/core/skbuff.c:605
 pskb_expand_head+0x202/0x1390 net/core/skbuff.c:2259
 __skb_pad+0x329/0x5c0 net/core/skbuff.c:2537
 __skb_put_padto include/linux/skbuff.h:3720 [inline]
 skb_put_padto include/linux/skbuff.h:3739 [inline]
 eth_skb_pad include/linux/etherdevice.h:656 [inline]
 e1000_xmit_frame+0x3938/0x5130 drivers/net/ethernet/intel/e1000/e1000_main.c:3123
 __netdev_start_xmit include/linux/netdevice.h:4913 [inline]
 netdev_start_xmit include/linux/netdevice.h:4922 [inline]
 xmit_one net/core/dev.c:3580 [inline]
 dev_hard_start_xmit+0x27a/0x7e0 net/core/dev.c:3596
 sch_direct_xmit+0x2b6/0x5f0 net/sched/sch_generic.c:343
 __dev_xmit_skb net/core/dev.c:3809 [inline]
 __dev_queue_xmit+0x1a7f/0x3e90 net/core/dev.c:4389
 dev_queue_xmit include/linux/netdevice.h:3105 [inline]
 neigh_hh_output include/net/neighbour.h:526 [inline]
 neigh_output include/net/neighbour.h:540 [inline]
 ip_finish_output2+0xd41/0x1390 net/ipv4/ip_output.c:235
page last free pid 8 tgid 8 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1094 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2612
 vfree+0x186/0x2e0 mm/vmalloc.c:3364
 delayed_vfree_work+0x56/0x80 mm/vmalloc.c:3285
 process_one_work kernel/workqueue.c:3231 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3312
 worker_thread+0x86d/0xd10 kernel/workqueue.c:3389
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff888012113e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888012113e80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888012113f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                                     ^
 ffff888012113f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888012114000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

Crashes (4):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/09/03 05:55 upstream 67784a74e258 0dd55198 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Read in udf_get_filelongad
2024/09/03 01:46 upstream 67784a74e258 0dd55198 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Read in udf_get_filelongad
2024/09/03 00:39 upstream 67784a74e258 0dd55198 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] [mounted in repro] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Read in udf_get_filelongad
2024/09/02 23:25 upstream 67784a74e258 0dd55198 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root KASAN: slab-out-of-bounds Read in udf_get_filelongad
* Struck through repros no longer work on HEAD.