syzkaller login: [ 28.932973] BUG: Bad rss-counter state mm:00000000ea740f51 type:MM_FILEPAGES val:33 [ 28.934137] BUG: Bad rss-counter state mm:00000000ea740f51 type:MM_ANONPAGES val:22 [ 29.084771] ================================================================== [ 29.085695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.086644] Read of size 8 at addr ffff88800f6bf880 by task sshd/220 [ 29.087424] [ 29.087643] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.088670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.089658] Call Trace: [ 29.090016] [ 29.090316] dump_stack_lvl+0x91/0xf0 [ 29.090807] print_report+0xcc/0x620 [ 29.091298] ? __virt_addr_valid+0x102/0x340 [ 29.091854] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.092475] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.093093] kasan_report+0xbe/0xf0 [ 29.093572] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.094213] vma_interval_tree_remove+0xc75/0xec0 [ 29.094822] vma_prepare+0xc54/0x11a0 [ 29.095299] __split_vma+0x5af/0x950 [ 29.095770] ? __pfx___split_vma+0x10/0x10 [ 29.096307] ? find_held_lock+0x2c/0x110 [ 29.096839] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.097406] ? lock_is_held_type+0x9f/0x120 [ 29.097969] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.098573] ? mtree_range_walk+0x632/0x900 [ 29.099137] ? mas_walk+0x5c7/0x7c0 [ 29.099624] do_vmi_munmap+0x1f1/0x2b0 [ 29.100117] mmap_region+0x1f9/0x2660 [ 29.100598] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.101111] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.101838] ? __pfx_lock_acquire+0x10/0x10 [ 29.102379] ? __pfx_mmap_region+0x10/0x10 [ 29.102909] ? security_mmap_addr+0x7d/0xa0 [ 29.103446] ? get_unmapped_area+0x1f5/0x3f0 [ 29.104004] do_mmap+0x854/0xf00 [ 29.104450] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.104946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.105512] ksys_mmap_pgoff+0x3af/0x500 [ 29.106038] do_syscall_64+0x3f/0x90 [ 29.106529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.107186] RIP: 0033:0x7f226ef45d82 [ 29.107649] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 29.109790] RSP: 002b:00007ffff99cfb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.110694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f226ef45d82 [ 29.111543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f226e37f000 [ 29.112397] RBP: 00007f226e37f000 R08: 0000000000000009 R09: 0000000000001000 [ 29.113242] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f6eeb7ec0 [ 29.114091] R13: 00007ffff99cfba0 R14: 00007ffff99cfbd0 R15: 00007ffff99cff30 [ 29.114951] [ 29.115241] [ 29.115463] Allocated by task 213: [ 29.115891] kasan_save_stack+0x22/0x50 [ 29.116397] kasan_set_track+0x25/0x30 [ 29.116896] __kasan_slab_alloc+0x59/0x70 [ 29.117460] kmem_cache_alloc+0x16b/0x370 [ 29.118007] vm_area_dup+0x20/0x160 [ 29.118461] __split_vma+0x170/0x950 [ 29.118926] split_vma+0xc6/0x110 [ 29.119362] mprotect_fixup+0x8d2/0xb30 [ 29.119865] do_mprotect_pkey+0x87e/0xd40 [ 29.120384] __x64_sys_mprotect+0x78/0xc0 [ 29.120905] do_syscall_64+0x3f/0x90 [ 29.121392] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.122043] [ 29.122262] Freed by task 220: [ 29.122650] kasan_save_stack+0x22/0x50 [ 29.123150] kasan_set_track+0x25/0x30 [ 29.123652] kasan_save_free_info+0x2b/0x50 [ 29.124182] __kasan_slab_free+0x10a/0x190 [ 29.124714] kmem_cache_free+0x10d/0x4d0 [ 29.125228] rcu_core+0x8c8/0x2860 [ 29.125689] __do_softirq+0x1b7/0x7d4 [ 29.126178] [ 29.126396] Last potentially related work creation: [ 29.126981] kasan_save_stack+0x22/0x50 [ 29.127494] __kasan_record_aux_stack+0x8e/0xa0 [ 29.128075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.128718] remove_vma+0x139/0x170 [ 29.129173] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.129807] do_vmi_munmap+0x1f1/0x2b0 [ 29.130290] __vm_munmap+0x138/0x3a0 [ 29.130754] __x64_sys_munmap+0x59/0x80 [ 29.131253] do_syscall_64+0x3f/0x90 [ 29.131725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.132365] [ 29.132578] The buggy address belongs to the object at ffff88800f6bf828 [ 29.132578] which belongs to the cache vm_area_struct of size 168 [ 29.134068] The buggy address is located 88 bytes inside of [ 29.134068] freed 168-byte region [ffff88800f6bf828, ffff88800f6bf8d0) [ 29.135477] [ 29.135695] The buggy address belongs to the physical page: [ 29.136354] page:00000000f3932658 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf6bf [ 29.137429] memcg:ffff888016e4f201 [ 29.137868] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.138525] page_type: 0xffffffff() [ 29.138977] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.139911] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e4f201 [ 29.140819] page dumped because: kasan: bad access detected [ 29.141475] [ 29.141700] Memory state around the buggy address: [ 29.142288] ffff88800f6bf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.143145] ffff88800f6bf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.144025] >ffff88800f6bf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.144880] ^ [ 29.145298] ffff88800f6bf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.146171] ffff88800f6bf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.147020] ================================================================== [ 29.147947] Disabling lock debugging due to kernel taint [ 31.201568] BUG: Bad rss-counter state mm:00000000d39ed626 type:MM_FILEPAGES val:33 [ 31.202885] BUG: Bad rss-counter state mm:00000000d39ed626 type:MM_ANONPAGES val:22 [ 31.685190] BUG: Bad rss-counter state mm:000000009aa92702 type:MM_FILEPAGES val:33 [ 31.686213] BUG: Bad rss-counter state mm:000000009aa92702 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48360' (ECDSA) to the list of known hosts. 2023/06/21 02:07:03 fuzzer started 2023/06/21 02:07:03 dialing manager at localhost:36067 2023/06/21 02:07:03 checking machine... 2023/06/21 02:07:03 checking revisions... [ 32.382076] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:07:03 testing simple program... [ 32.437627] cgroup: Unknown subsys name 'net' [ 32.475315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:07:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8364da00 RDX=ffff888016660000 RSI=0000000000000000 RDI=0000000000000000 RBP=dffffc0000000000 RSP=ffff8880145c7a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=7fffffffffffffff R13=ffff88801592d800 R14=ffff8880145c7c48 R15=dffffc0000000000 RIP=ffffffff814c0408 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9e717fc900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f9e71db1650 CR3=000000001ca34000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f3fec0b4740 CR3=000000000d9ce000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=4e4e143255ef08a4b143722cf8a5bd28 XMM02=000000000011db40ec2efd57dc4c00df XMM03=00000000001222782dc9b463de969bf4 XMM04=324555d91a9be93800000000000ae988 XMM05=19e9129bd510f23500000000001320f0 XMM06=ce0fe3eec97d09a00000000000130f58 XMM07=e042d86d42eb936e00000000001224f8 XMM08=2dc9b463de969bf4000000000011dba0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000