syzkaller login: [ 45.044498] BUG: Bad rss-counter state mm:00000000923be6b5 type:MM_FILEPAGES val:33 [ 45.045877] BUG: Bad rss-counter state mm:00000000923be6b5 type:MM_ANONPAGES val:22 [ 45.087022] ================================================================== [ 45.088068] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.089137] Read of size 8 at addr ffff88800ce37a50 by task sshd/219 [ 45.089950] [ 45.090182] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.091108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.092143] Call Trace: [ 45.092482] [ 45.092784] dump_stack_lvl+0x91/0xf0 [ 45.093299] print_report+0xcc/0x620 [ 45.093816] ? __virt_addr_valid+0x102/0x340 [ 45.094399] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.095058] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.095751] kasan_report+0xbe/0xf0 [ 45.096275] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.096959] vma_interval_tree_remove+0xc75/0xec0 [ 45.097624] vma_prepare+0xc54/0x11a0 [ 45.098154] __split_vma+0x5af/0x950 [ 45.098672] ? __pfx___split_vma+0x10/0x10 [ 45.099251] ? find_held_lock+0x2c/0x110 [ 45.099845] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.100467] ? lock_is_held_type+0x9f/0x120 [ 45.101055] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.101730] ? mtree_range_walk+0x632/0x900 [ 45.102340] ? mas_walk+0x5c7/0x7c0 [ 45.102862] do_vmi_munmap+0x1f1/0x2b0 [ 45.103410] mmap_region+0x1f9/0x2660 [ 45.103945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.104503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.105284] ? __pfx_lock_acquire+0x10/0x10 [ 45.105870] ? __pfx_mmap_region+0x10/0x10 [ 45.106448] ? security_mmap_addr+0x7d/0xa0 [ 45.107035] ? get_unmapped_area+0x1f5/0x3f0 [ 45.107643] do_mmap+0x854/0xf00 [ 45.108142] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.108681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.109306] ksys_mmap_pgoff+0x3af/0x500 [ 45.109865] do_syscall_64+0x3f/0x90 [ 45.110385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.111090] RIP: 0033:0x7f57ae23ad82 [ 45.111593] 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 [ 45.113947] RSP: 002b:00007ffe2e74c838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.114951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57ae23ad82 [ 45.115890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57ad674000 [ 45.116831] RBP: 00007f57ad674000 R08: 0000000000000009 R09: 0000000000001000 [ 45.117772] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bd975dec0 [ 45.118720] R13: 00007ffe2e74c850 R14: 00007ffe2e74c880 R15: 00007ffe2e74cbe0 [ 45.119665] [ 45.120015] [ 45.120248] Allocated by task 212: [ 45.120765] kasan_save_stack+0x22/0x50 [ 45.121348] kasan_set_track+0x25/0x30 [ 45.121918] __kasan_slab_alloc+0x59/0x70 [ 45.122528] kmem_cache_alloc+0x16b/0x370 [ 45.123122] vm_area_dup+0x20/0x160 [ 45.123638] __split_vma+0x170/0x950 [ 45.124188] split_vma+0xc6/0x110 [ 45.124701] mprotect_fixup+0x8d2/0xb30 [ 45.125287] do_mprotect_pkey+0x87e/0xd40 [ 45.125892] __x64_sys_mprotect+0x78/0xc0 [ 45.126500] do_syscall_64+0x3f/0x90 [ 45.127045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.127797] [ 45.128047] Freed by task 212: [ 45.128496] kasan_save_stack+0x22/0x50 [ 45.129111] kasan_set_track+0x25/0x30 [ 45.129655] kasan_save_free_info+0x2b/0x50 [ 45.130242] __kasan_slab_free+0x10a/0x190 [ 45.130830] kmem_cache_free+0x10d/0x4d0 [ 45.131390] rcu_core+0x8c8/0x2860 [ 45.131885] __do_softirq+0x1b7/0x7d4 [ 45.132405] [ 45.132639] Last potentially related work creation: [ 45.133287] kasan_save_stack+0x22/0x50 [ 45.133841] __kasan_record_aux_stack+0x8e/0xa0 [ 45.134473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.135180] remove_vma+0x139/0x170 [ 45.135673] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.136310] do_vmi_munmap+0x1f1/0x2b0 [ 45.136844] __vm_munmap+0x138/0x3a0 [ 45.137388] __x64_sys_munmap+0x59/0x80 [ 45.137932] do_syscall_64+0x3f/0x90 [ 45.138456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.139162] [ 45.139399] Second to last potentially related work creation: [ 45.140160] kasan_save_stack+0x22/0x50 [ 45.140721] __kasan_record_aux_stack+0x8e/0xa0 [ 45.141356] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.142061] remove_vma+0x139/0x170 [ 45.142561] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.143173] do_vmi_munmap+0x1f1/0x2b0 [ 45.143705] mmap_region+0x1f9/0x2660 [ 45.144241] do_mmap+0x854/0xf00 [ 45.144715] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.145251] ksys_mmap_pgoff+0x3af/0x500 [ 45.145798] do_syscall_64+0x3f/0x90 [ 45.146322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.147025] [ 45.147260] The buggy address belongs to the object at ffff88800ce379f8 [ 45.147260] which belongs to the cache vm_area_struct of size 168 [ 45.148850] The buggy address is located 88 bytes inside of [ 45.148850] freed 168-byte region [ffff88800ce379f8, ffff88800ce37aa0) [ 45.150334] [ 45.150569] The buggy address belongs to the physical page: [ 45.151268] page:00000000ac0e1bae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xce37 [ 45.152434] memcg:ffff88800f108101 [ 45.152882] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.153622] page_type: 0xffffffff() [ 45.154100] raw: 0100000000000200 ffff88800879fc80 ffffea00003904c0 dead000000000005 [ 45.155072] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f108101 [ 45.156040] page dumped because: kasan: bad access detected [ 45.156743] [ 45.156970] Memory state around the buggy address: [ 45.157585] ffff88800ce37900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.158514] ffff88800ce37980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 45.159455] >ffff88800ce37a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.160406] ^ [ 45.161170] ffff88800ce37a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 45.162103] ffff88800ce37b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.163039] ================================================================== [ 45.164299] Disabling lock debugging due to kernel taint [ 47.089311] BUG: Bad rss-counter state mm:00000000e520c8cc type:MM_FILEPAGES val:33 [ 47.089811] BUG: Bad rss-counter state mm:00000000e520c8cc type:MM_ANONPAGES val:22 [ 47.512288] BUG: Bad rss-counter state mm:0000000013571d26 type:MM_FILEPAGES val:33 [ 47.513329] BUG: Bad rss-counter state mm:0000000013571d26 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59283' (ECDSA) to the list of known hosts. 2023/06/20 07:40:58 fuzzer started 2023/06/20 07:40:59 dialing manager at localhost:44161 2023/06/20 07:40:59 checking machine... 2023/06/20 07:40:59 checking revisions... [ 48.126246] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:40:59 testing simple program... [ 48.175631] cgroup: Unknown subsys name 'net' [ 48.220086] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:40:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000008 RSI=ffff888015e8f4a0 RDI=ffff888015e8f370 RBP=ffff888015e8f3c8 RSP=ffff888015e8f2f8 R8 =ffffffff860d68fa R9 =ffff888015e8f3b0 R10=0000000000038001 R11=0000000000010b7e R12=ffff888015e8f3d0 R13=ffff888015e8f3b8 R14=ffff888015e8f4a8 R15=ffff888015e8f370 RIP=ffffffff811303fa 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 00007f4029f4e900 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=00007ffcb69df000 CR3=000000000d762000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe620710830 CR3=000000000e05c000 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=2038353a30343a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a30343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000