Hello, syzbot found the following issue on: HEAD commit: 81e7cfa3a9eb Merge tag 'erofs-for-6.1-rc6-fixes' of git://.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=165645be880000 kernel config: https://syzkaller.appspot.com/x/.config?x=11d3fa0b3feb5055 dashboard link: https://syzkaller.appspot.com/bug?extid=12c0b1ffb9f94668586f compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/8b37d56c44e6/disk-81e7cfa3.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/73cad2fe5bfa/vmlinux-81e7cfa3.xz kernel image: https://storage.googleapis.com/syzbot-assets/961f30b0f25b/bzImage-81e7cfa3.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+12c0b1ffb9f94668586f@xxxxxxxxxxxxxxxxxxxxxxxxx ================================================================== BUG: KASAN: use-after-free in __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925 Read of size 8 at addr ffff888077f35e38 by task syz-executor.4/18398 CPU: 1 PID: 18398 Comm: syz-executor.4 Not tainted 6.1.0-rc5-syzkaller-00015-g81e7cfa3a9eb #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd1/0x138 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:284 [inline] print_report+0x15e/0x461 mm/kasan/report.c:395 kasan_report+0xbf/0x1f0 mm/kasan/report.c:495 __lock_acquire+0x3ee7/0x56d0 kernel/locking/lockdep.c:4925 lock_acquire kernel/locking/lockdep.c:5668 [inline] lock_acquire+0x1e3/0x630 kernel/locking/lockdep.c:5633 __raw_spin_lock_irq include/linux/spinlock_api_smp.h:119 [inline] _raw_spin_lock_irq+0x36/0x50 kernel/locking/spinlock.c:170 rwsem_down_write_slowpath+0x657/0x12e0 kernel/locking/rwsem.c:1194 __down_write_common kernel/locking/rwsem.c:1305 [inline] __down_write_common kernel/locking/rwsem.c:1302 [inline] __down_write kernel/locking/rwsem.c:1314 [inline] down_write+0x1e8/0x220 kernel/locking/rwsem.c:1563 hugetlb_vma_lock_write mm/hugetlb.c:6838 [inline] __unmap_hugepage_range_final+0x9b/0x350 mm/hugetlb.c:5202 unmap_single_vma+0x23d/0x2a0 mm/memory.c:1690 zap_page_range+0x392/0x530 mm/memory.c:1762 madvise_dontneed_single_vma mm/madvise.c:793 [inline] madvise_dontneed_free mm/madvise.c:886 [inline] madvise_vma_behavior+0x12df/0x2050 mm/madvise.c:1025 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1250 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1429 do_madvise mm/madvise.c:1442 [inline] __do_sys_madvise mm/madvise.c:1442 [inline] __se_sys_madvise mm/madvise.c:1440 [inline] __x64_sys_madvise+0x117/0x150 mm/madvise.c:1440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fe427c8b639 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007fe428987168 EFLAGS: 00000246 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 00007fe427dac120 RCX: 00007fe427c8b639 RDX: 0000000000000004 RSI: 0000000000800000 RDI: 0000000020800000 RBP: 00007fe427ce6ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff480924af R14: 00007fe428987300 R15: 0000000000022000 </TASK> Allocated by task 18391: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 ____kasan_kmalloc mm/kasan/common.c:371 [inline] ____kasan_kmalloc mm/kasan/common.c:330 [inline] __kasan_kmalloc+0xa3/0xb0 mm/kasan/common.c:380 kmalloc include/linux/slab.h:553 [inline] hugetlb_vma_lock_alloc.part.0+0x3f/0x130 mm/hugetlb.c:6930 hugetlb_vma_lock_alloc mm/hugetlb.c:6686 [inline] hugetlb_reserve_pages+0xa43/0xe90 mm/hugetlb.c:6555 hugetlbfs_file_mmap+0x410/0x5c0 fs/hugetlbfs/inode.c:167 call_mmap include/linux/fs.h:2196 [inline] mmap_region+0x6c3/0x1dd0 mm/mmap.c:2625 do_mmap+0x831/0xf60 mm/mmap.c:1412 vm_mmap_pgoff+0x1af/0x280 mm/util.c:520 ksys_mmap_pgoff+0x1c7/0x5a0 mm/mmap.c:1458 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 18396: kasan_save_stack+0x22/0x40 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:511 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x13b/0x1a0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:177 [inline] __cache_free mm/slab.c:3389 [inline] __do_kmem_cache_free mm/slab.c:3585 [inline] __kmem_cache_free+0xcd/0x3b0 mm/slab.c:3592 hugetlb_vma_lock_release mm/hugetlb.c:6875 [inline] kref_put include/linux/kref.h:65 [inline] __hugetlb_vma_unlock_write_put mm/hugetlb.c:6890 [inline] __hugetlb_vma_unlock_write_free mm/hugetlb.c:6898 [inline] __unmap_hugepage_range_final+0x2b1/0x350 mm/hugetlb.c:5215 unmap_single_vma+0x23d/0x2a0 mm/memory.c:1690 zap_page_range+0x392/0x530 mm/memory.c:1762 madvise_dontneed_single_vma mm/madvise.c:793 [inline] madvise_dontneed_free mm/madvise.c:886 [inline] madvise_vma_behavior+0x12df/0x2050 mm/madvise.c:1025 madvise_walk_vmas+0x1c7/0x2b0 mm/madvise.c:1250 do_madvise.part.0+0x24a/0x340 mm/madvise.c:1429 do_madvise mm/madvise.c:1442 [inline] __do_sys_madvise mm/madvise.c:1442 [inline] __se_sys_madvise mm/madvise.c:1440 [inline] __x64_sys_madvise+0x117/0x150 mm/madvise.c:1440 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd The buggy address belongs to the object at ffff888077f35e00 which belongs to the cache kmalloc-192 of size 192 The buggy address is located 56 bytes inside of 192-byte region [ffff888077f35e00, ffff888077f35ec0) The buggy address belongs to the physical page: page:ffffea0001dfcd40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x77f35 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 ffffea0001f70ac8 ffffea00005e87c8 ffff888012040000 raw: 0000000000000000 ffff888077f35000 0000000100000010 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 0x3420c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_COMP|__GFP_HARDWALL|__GFP_THISNODE), pid 16305, tgid 16297 (syz-executor.0), ts 943277514051, free_ts 941060075554 prep_new_page mm/page_alloc.c:2539 [inline] get_page_from_freelist+0x10b5/0x2d50 mm/page_alloc.c:4288 __alloc_pages+0x1cb/0x5b0 mm/page_alloc.c:5555 __alloc_pages_node include/linux/gfp.h:223 [inline] kmem_getpages mm/slab.c:1363 [inline] cache_grow_begin+0x75/0x360 mm/slab.c:2570 cache_alloc_refill+0x27f/0x380 mm/slab.c:2943 ____cache_alloc mm/slab.c:3019 [inline] ____cache_alloc mm/slab.c:3002 [inline] __do_cache_alloc mm/slab.c:3202 [inline] slab_alloc_node mm/slab.c:3250 [inline] __kmem_cache_alloc_node+0x44a/0x510 mm/slab.c:3549 kmalloc_trace+0x26/0x60 mm/slab_common.c:1045 kmalloc include/linux/slab.h:553 [inline] kzalloc include/linux/slab.h:689 [inline] push_stack+0x77/0x560 kernel/bpf/verifier.c:1282 check_cond_jmp_op kernel/bpf/verifier.c:10233 [inline] do_check kernel/bpf/verifier.c:12460 [inline] do_check_common+0x643f/0xcc80 kernel/bpf/verifier.c:14652 do_check_main kernel/bpf/verifier.c:14715 [inline] bpf_check+0x88dc/0xb8e0 kernel/bpf/verifier.c:15285 bpf_prog_load+0x1543/0x2220 kernel/bpf/syscall.c:2605 __sys_bpf+0x1436/0x4f40 kernel/bpf/syscall.c:4965 __do_sys_bpf kernel/bpf/syscall.c:5069 [inline] __se_sys_bpf kernel/bpf/syscall.c:5067 [inline] __x64_sys_bpf+0x79/0xc0 kernel/bpf/syscall.c:5067 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1459 [inline] free_pcp_prepare+0x65c/0xd90 mm/page_alloc.c:1509 free_unref_page_prepare mm/page_alloc.c:3387 [inline] free_unref_page+0x1d/0x4d0 mm/page_alloc.c:3483 slab_destroy mm/slab.c:1615 [inline] slabs_destroy+0x85/0xc0 mm/slab.c:1635 cache_flusharray mm/slab.c:3360 [inline] ___cache_free+0x2ac/0x3d0 mm/slab.c:3423 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x4f/0x1a0 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x184/0x210 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0x63/0x90 mm/kasan/common.c:302 kasan_slab_alloc include/linux/kasan.h:201 [inline] slab_post_alloc_hook mm/slab.h:737 [inline] slab_alloc_node mm/slab.c:3257 [inline] kmem_cache_alloc_node+0x28f/0x580 mm/slab.c:3537 __alloc_skb+0x214/0x300 net/core/skbuff.c:497 alloc_skb_fclone include/linux/skbuff.h:1317 [inline] tcp_stream_alloc_skb+0x3c/0x580 net/ipv4/tcp.c:862 tcp_connect+0xd1b/0x4240 net/ipv4/tcp_output.c:3855 tcp_v4_connect+0x19ad/0x2580 net/ipv4/tcp_ipv4.c:333 __inet_stream_connect+0x69e/0xed0 net/ipv4/af_inet.c:665 inet_stream_connect+0x57/0xa0 net/ipv4/af_inet.c:729 __sys_connect_file+0x153/0x1a0 net/socket.c:1976 io_connect+0x3cc/0x720 io_uring/net.c:1429 Memory state around the buggy address: ffff888077f35d00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888077f35d80: 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888077f35e00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888077f35e80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ffff888077f35f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ================================================================== --- This report is generated by a bot. 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