> -----Original Message----- > From: Zhu Yanjun <yanjun.zhu@xxxxxxxxx> > Sent: Thursday, March 20, 2025 9:41 AM > To: syzbot <syzbot+17fb1664c4f5a2eeb36f@xxxxxxxxxxxxxxxxxxxxxxxxx>; > jgg@xxxxxxxx; leon@xxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; linux- > rdma@xxxxxxxxxxxxxxx; netdev@xxxxxxxxxxxxxxx; syzkaller- > bugs@xxxxxxxxxxxxxxxx > Subject: [EXTERNAL] Re: [syzbot] [rdma?] KASAN: slab-use-after-free Read in > ib_device_uevent (2) > > On 16.02.25 22:55, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 09fbf3d50205 Merge tag 'tomoyo-pr-20250211' of > git://git.c.. > > git tree: upstream > > console output: https% > 3A__syzkaller.appspot.com_x_log.txt-3Fx- > 3D140563f8580000&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4t > YSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEc > BAbeCqJelsb3Q&s=4HoaGCofTzC69mNNZLu7urW39zt-qZ0jHEwjCNq3e9Y&e= > > kernel config: https% > 3A__syzkaller.appspot.com_x_.config-3Fx- > 3D641fe3e3cfee64bb&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE > 4tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPx > EcBAbeCqJelsb3Q&s=jAjZbjn-w2sZsfK2gPXlLFltAGHvZLQFzWfk1TvVDc8&e= > > dashboard link: https% > 3A__syzkaller.appspot.com_bug-3Fextid- > 3D17fb1664c4f5a2eeb36f&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbh > vovE4tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ > 4gPxEcBAbeCqJelsb3Q&s=5B7eaLwpVQ_61Ux3yGd2CKLvh-uQsJf4-9v4bbRC0uk&e= > > compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for > Debian) 2.40 > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > Downloadable assets: > > disk image (non-bootable): > https% > 3A__storage.googleapis.com_syzbot-2Dassets_7feb34a89c2a_non-5Fbootable- > 5Fdisk- > 2D09fbf3d5.raw.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4 > tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxE > cBAbeCqJelsb3Q&s=hw8G10Pj-FRcaJZfChWmSKE8GaozuUeI85UvisfTHEQ&e= > > vmlinux: https% > 3A__storage.googleapis.com_syzbot-2Dassets_31b409a4b675_vmlinux- > 2D09fbf3d5.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb > qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb > eCqJelsb3Q&s=Ih8IyDMEvy9jwvc2noeIX5E0FgZRM8D2RmxTNE3nih4&e= > > kernel image: https% > 3A__storage.googleapis.com_syzbot-2Dassets_27f349d4d8cb_bzImage- > 2D09fbf3d5.xz&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb > qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb > eCqJelsb3Q&s=PMgqb590AII6znT2g--1TKjjkadAlznJi0aFX-v9Pnw&e= > > > > IMPORTANT: if you fix the issue, please add the following tag to the > commit: > > Reported-by: syzbot+17fb1664c4f5a2eeb36f@xxxxxxxxxxxxxxxxxxxxxxxxx > > To this problem, I just looked through this problem which occurred on > iwarp. I remember a similar problem which occurred on rxe. > To the problem on rxe, the solution > https% > 3A__patchwork.kernel.org_project_linux-2Drdma_patch_20250313092421.944658- > 2D1-2Dwangliang74- > 40huawei.com_&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSb > qxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAb > eCqJelsb3Q&s=YC4HmD2kVw28DToigJwJRY1U8oNFfvQgMF2S5wpatak&e= > seems to be able to fix it. > > I am not sure if this problem can also be fixed by the above solution or > not. > I would assume yes. The stack trace is very similar. Thanks, Bernard. > Best Regards, > Zhu Yanjun > > > > > ================================================================== > > BUG: KASAN: slab-use-after-free in string_nocheck lib/vsprintf.c:632 > [inline] > > BUG: KASAN: slab-use-after-free in string+0x4a6/0x4f0 lib/vsprintf.c:714 > > Read of size 1 at addr ffff88803e895ea0 by task udevd/6903 > > > > CPU: 1 UID: 0 PID: 6903 Comm: udevd Not tainted 6.14.0-rc2-syzkaller- > 00039-g09fbf3d50205 #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:94 [inline] > > dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 > > print_address_description mm/kasan/report.c:378 [inline] > > print_report+0xc3/0x620 mm/kasan/report.c:489 > > kasan_report+0xd9/0x110 mm/kasan/report.c:602 > > string_nocheck lib/vsprintf.c:632 [inline] > > string+0x4a6/0x4f0 lib/vsprintf.c:714 > > vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843 > > add_uevent_var+0x17c/0x3a0 lib/kobject_uevent.c:679 > > ib_device_uevent+0x4e/0xb0 drivers/infiniband/core/device.c:502 > > dev_uevent+0x28b/0x770 drivers/base/core.c:2673 > > uevent_show+0x1d8/0x3b0 drivers/base/core.c:2731 > > dev_attr_show+0x53/0xe0 drivers/base/core.c:2423 > > sysfs_kf_seq_show+0x23e/0x410 fs/sysfs/file.c:59 > > seq_read_iter+0x4f4/0x12b0 fs/seq_file.c:230 > > kernfs_fop_read_iter+0x414/0x580 fs/kernfs/file.c:279 > > new_sync_read fs/read_write.c:484 [inline] > > vfs_read+0x886/0xbf0 fs/read_write.c:565 > > ksys_read+0x12b/0x250 fs/read_write.c:708 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > RIP: 0033:0x7f7681378b6a > > Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 > c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 > ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83 > > RSP: 002b:00007ffcbdf9d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 > > RAX: ffffffffffffffda RBX: 000055efbec7de20 RCX: 00007f7681378b6a > > RDX: 0000000000001000 RSI: 000055efbeca9490 RDI: 0000000000000008 > > RBP: 000055efbec7de20 R08: 0000000000000008 R09: 0000000000020000 > > R10: 000000000000010f R11: 0000000000000246 R12: 0000000000000000 > > R13: 0000000000003fff R14: 00007ffcbdf9d518 R15: 000000000000000a > > </TASK> > > > > Allocated by task 12483: > > kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 > > kasan_save_track+0x14/0x30 mm/kasan/common.c:68 > > poison_kmalloc_redzone mm/kasan/common.c:377 [inline] > > __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 > > kasan_kmalloc include/linux/kasan.h:260 [inline] > > __do_kmalloc_node mm/slub.c:4294 [inline] > > __kmalloc_node_track_caller_noprof+0x222/0x510 mm/slub.c:4313 > > __kmemdup_nul mm/util.c:61 [inline] > > kstrdup+0x53/0x100 mm/util.c:81 > > kstrdup_const+0x63/0x80 mm/util.c:101 > > kvasprintf_const+0x164/0x1a0 lib/kasprintf.c:46 > > kobject_set_name_vargs+0x5a/0x140 lib/kobject.c:274 > > dev_set_name+0xc8/0x100 drivers/base/core.c:3468 > > assign_name drivers/infiniband/core/device.c:1202 [inline] > > ib_register_device+0x7e0/0xdf0 drivers/infiniband/core/device.c:1384 > > siw_device_register drivers/infiniband/sw/siw/siw_main.c:72 [inline] > > siw_newlink drivers/infiniband/sw/siw/siw_main.c:431 [inline] > > siw_newlink+0xb60/0xd70 drivers/infiniband/sw/siw/siw_main.c:413 > > nldev_newlink+0x38e/0x660 drivers/infiniband/core/nldev.c:1795 > > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195 > > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 > drivers/infiniband/core/netlink.c:239 > > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] > > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348 > > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892 > > sock_sendmsg_nosec net/socket.c:718 [inline] > > __sock_sendmsg net/socket.c:733 [inline] > > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 > > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 > > __sys_sendmsg+0x16e/0x220 net/socket.c:2659 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > > > Freed by task 12485: > > kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 > > kasan_save_track+0x14/0x30 mm/kasan/common.c:68 > > kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576 > > poison_slab_object mm/kasan/common.c:247 [inline] > > __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 > > kasan_slab_free include/linux/kasan.h:233 [inline] > > slab_free_hook mm/slub.c:2353 [inline] > > slab_free mm/slub.c:4609 [inline] > > kfree+0x2c4/0x4d0 mm/slub.c:4757 > > kfree_const+0x55/0x60 mm/util.c:43 > > kobject_rename+0x179/0x260 lib/kobject.c:524 > > device_rename+0x130/0x230 drivers/base/core.c:4525 > > ib_device_rename+0x114/0x5c0 drivers/infiniband/core/device.c:402 > > nldev_set_doit+0x3be/0x4c0 drivers/infiniband/core/nldev.c:1146 > > rdma_nl_rcv_msg+0x388/0x6e0 drivers/infiniband/core/netlink.c:195 > > rdma_nl_rcv_skb.constprop.0.isra.0+0x2e6/0x450 > drivers/infiniband/core/netlink.c:239 > > netlink_unicast_kernel net/netlink/af_netlink.c:1322 [inline] > > netlink_unicast+0x53c/0x7f0 net/netlink/af_netlink.c:1348 > > netlink_sendmsg+0x8b8/0xd70 net/netlink/af_netlink.c:1892 > > sock_sendmsg_nosec net/socket.c:718 [inline] > > __sock_sendmsg net/socket.c:733 [inline] > > ____sys_sendmsg+0xaaf/0xc90 net/socket.c:2573 > > ___sys_sendmsg+0x135/0x1e0 net/socket.c:2627 > > __sys_sendmsg+0x16e/0x220 net/socket.c:2659 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > > > The buggy address belongs to the object at ffff88803e895ea0 > > which belongs to the cache kmalloc-8 of size 8 > > The buggy address is located 0 bytes inside of > > freed 8-byte region [ffff88803e895ea0, ffff88803e895ea8) > > > > The buggy address belongs to the physical page: > > page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 > pfn:0x3e895 > > flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) > > page_type: f5(slab) > > raw: 00fff00000000000 ffff88801b042500 ffffea0000a05a00 dead000000000002 > > raw: 0000000000000000 0000000000800080 00000000f5000000 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 > 0x52cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 11986, tgid > 11985 (syz.1.1513), ts 150711065425, free_ts 150704805794 > > set_page_owner include/linux/page_owner.h:32 [inline] > > post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1551 > > prep_new_page mm/page_alloc.c:1559 [inline] > > get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3477 > > __alloc_frozen_pages_noprof+0x221/0x2470 mm/page_alloc.c:4739 > > alloc_pages_mpol+0x1fc/0x540 mm/mempolicy.c:2270 > > alloc_slab_page mm/slub.c:2423 [inline] > > allocate_slab mm/slub.c:2587 [inline] > > new_slab+0x23d/0x330 mm/slub.c:2640 > > ___slab_alloc+0xc5d/0x1720 mm/slub.c:3826 > > __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3916 > > __slab_alloc_node mm/slub.c:3991 [inline] > > slab_alloc_node mm/slub.c:4152 [inline] > > __do_kmalloc_node mm/slub.c:4293 [inline] > > __kmalloc_node_noprof+0x2f0/0x510 mm/slub.c:4300 > > __kvmalloc_node_noprof+0xad/0x1a0 mm/util.c:662 > > kvmalloc_array_node_noprof include/linux/slab.h:1063 [inline] > > __ptr_ring_init_queue_alloc_noprof include/linux/ptr_ring.h:471 > [inline] > > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:634 > [inline] > > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 > [inline] > > pfifo_fast_change_tx_queue_len+0x157/0xbb0 net/sched/sch_generic.c:909 > > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline] > > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457 > > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362 > > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608 > > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826 > > sock_do_ioctl+0x19e/0x280 net/socket.c:1213 > > sock_ioctl+0x228/0x6c0 net/socket.c:1318 > > page last free pid 11986 tgid 11985 stack trace: > > reset_page_owner include/linux/page_owner.h:25 [inline] > > free_pages_prepare mm/page_alloc.c:1127 [inline] > > free_frozen_pages+0x6db/0xfb0 mm/page_alloc.c:2660 > > __put_partials+0x14c/0x170 mm/slub.c:3153 > > qlink_free mm/kasan/quarantine.c:163 [inline] > > qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 > > kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 > > __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 > > kasan_slab_alloc include/linux/kasan.h:250 [inline] > > slab_post_alloc_hook mm/slub.c:4115 [inline] > > slab_alloc_node mm/slub.c:4164 [inline] > > __kmalloc_cache_noprof+0x243/0x410 mm/slub.c:4320 > > kmalloc_noprof include/linux/slab.h:901 [inline] > > kmalloc_array_noprof include/linux/slab.h:945 [inline] > > ptr_ring_resize_multiple_bh_noprof include/linux/ptr_ring.h:629 > [inline] > > skb_array_resize_multiple_bh_noprof include/linux/skb_array.h:208 > [inline] > > pfifo_fast_change_tx_queue_len+0xe1/0xbb0 net/sched/sch_generic.c:909 > > qdisc_change_tx_queue_len net/sched/sch_generic.c:1410 [inline] > > dev_qdisc_change_tx_queue_len+0x166/0x380 net/sched/sch_generic.c:1457 > > dev_change_tx_queue_len+0x1a3/0x1e0 net/core/dev.c:9362 > > dev_ifsioc+0xdfe/0x10d0 net/core/dev_ioctl.c:608 > > dev_ioctl+0x224/0x10c0 net/core/dev_ioctl.c:826 > > sock_do_ioctl+0x19e/0x280 net/socket.c:1213 > > sock_ioctl+0x228/0x6c0 net/socket.c:1318 > > vfs_ioctl fs/ioctl.c:51 [inline] > > __do_sys_ioctl fs/ioctl.c:906 [inline] > > __se_sys_ioctl fs/ioctl.c:892 [inline] > > __x64_sys_ioctl+0x190/0x200 fs/ioctl.c:892 > > do_syscall_x64 arch/x86/entry/common.c:52 [inline] > > do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 > > entry_SYSCALL_64_after_hwframe+0x77/0x7f > > > > Memory state around the buggy address: > > ffff88803e895d80: 05 fc fc fc fa fc fc fc 05 fc fc fc fa fc fc fc > > ffff88803e895e00: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc > >> ffff88803e895e80: 05 fc fc fc fa fc fc fc 05 fc fc fc 00 fc fc fc > > ^ > > ffff88803e895f00: 05 fc fc fc 05 fc fc fc 05 fc fc fc fa fc fc fc > > ffff88803e895f80: 05 fc fc fc 00 fc fc fc 05 fc fc fc fa fc fc fc > > ================================================================== > > > > > > --- > > This report is generated by a bot. It may contain errors. > > See https% > 3A__goo.gl_tpsmEJ&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4 > tYSbqxyOwdSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxE > cBAbeCqJelsb3Q&s=9KITFSQjSP-M8czK13OhII3KvAyuGKJaXzqd8UkFCUA&e= for more > information about syzbot. > > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > > > syzbot will keep track of this issue. See: > > https://goo.gl/tpsmEJ% > 23status&d=DwICaQ&c=BSDicqBQBDjDI9RkVyTcHQ&r=4ynb4Sj_4MUcZXbhvovE4tYSbqxyOw > dSiLedP4yO55g&m=srgskMI0sa3T0mS2H_izLLDgZ1Sh2TpNoxBofzPAozKcJ4gPxEcBAbeCqJe > lsb3Q&s=Jclx0sFtbIZqLvA1ZP_CtdN-lZHrwyGSFSAz6f8W4Ng&e= for how to > communicate with syzbot. > > > > If the report is already addressed, let syzbot know by replying with: > > #syz fix: exact-commit-title > > > > If you want to overwrite report's subsystems, reply with: > > #syz set subsystems: new-subsystem > > (See the list of subsystem names on the web dashboard) > > > > If the report is a duplicate of another one, reply with: > > #syz dup: exact-subject-of-another-report > > > > If you want to undo deduplication, reply with: > > #syz undup >
