syzkaller login: [ 31.634595] BUG: Bad rss-counter state mm:000000006207a135 type:MM_FILEPAGES val:33 [ 31.635867] BUG: Bad rss-counter state mm:000000006207a135 type:MM_ANONPAGES val:22 [ 31.779977] ================================================================== [ 31.781108] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.782258] Read of size 8 at addr ffff88800e332ed8 by task sshd/221 [ 31.783310] [ 31.783578] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.784639] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.785840] Call Trace: [ 31.786230] [ 31.786583] dump_stack_lvl+0x91/0xf0 [ 31.787240] print_report+0xcc/0x620 [ 31.787779] ? __virt_addr_valid+0x102/0x340 [ 31.788348] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.788997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789646] kasan_report+0xbe/0xf0 [ 31.790141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790796] vma_interval_tree_remove+0xc75/0xec0 [ 31.791436] vma_prepare+0xc54/0x11a0 [ 31.791930] __split_vma+0x5af/0x950 [ 31.792417] ? __pfx___split_vma+0x10/0x10 [ 31.792964] ? find_held_lock+0x2c/0x110 [ 31.793503] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.794081] ? lock_is_held_type+0x9f/0x120 [ 31.794645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.795287] ? mtree_range_walk+0x632/0x900 [ 31.795855] ? mas_walk+0x5c7/0x7c0 [ 31.796347] do_vmi_munmap+0x1f1/0x2b0 [ 31.796859] mmap_region+0x1f9/0x2660 [ 31.797361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.797889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.798626] ? __pfx_lock_acquire+0x10/0x10 [ 31.799176] ? __pfx_mmap_region+0x10/0x10 [ 31.799727] ? security_mmap_addr+0x7d/0xa0 [ 31.800276] ? get_unmapped_area+0x1f5/0x3f0 [ 31.800847] do_mmap+0x854/0xf00 [ 31.801302] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.801809] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.802389] ksys_mmap_pgoff+0x3af/0x500 [ 31.802918] do_syscall_64+0x3f/0x90 [ 31.803425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804094] RIP: 0033:0x7ffa0cf71d82 [ 31.804571] 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 [ 31.806771] RSP: 002b:00007fff01ff8c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807714] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa0cf71d82 [ 31.808606] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa0c3ab000 [ 31.809512] RBP: 00007ffa0c3ab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.810426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055565ae03d90 [ 31.811356] R13: 00007fff01ff8c90 R14: 00007fff01ff8cc0 R15: 00007fff01ff9020 [ 31.812280] [ 31.812592] [ 31.812819] Allocated by task 214: [ 31.813287] kasan_save_stack+0x22/0x50 [ 31.813829] kasan_set_track+0x25/0x30 [ 31.814356] __kasan_slab_alloc+0x59/0x70 [ 31.814920] kmem_cache_alloc+0x16b/0x370 [ 31.815493] vm_area_dup+0x20/0x160 [ 31.815980] __split_vma+0x170/0x950 [ 31.816481] split_vma+0xc6/0x110 [ 31.816954] mprotect_fixup+0x8d2/0xb30 [ 31.817492] do_mprotect_pkey+0x87e/0xd40 [ 31.818054] __x64_sys_mprotect+0x78/0xc0 [ 31.818616] do_syscall_64+0x3f/0x90 [ 31.819125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.819832] [ 31.820060] Freed by task 214: [ 31.820486] kasan_save_stack+0x22/0x50 [ 31.821032] kasan_set_track+0x25/0x30 [ 31.821571] kasan_save_free_info+0x2b/0x50 [ 31.822147] __kasan_slab_free+0x10a/0x190 [ 31.822726] kmem_cache_free+0x10d/0x4d0 [ 31.823287] rcu_core+0x8c8/0x2860 [ 31.823827] __do_softirq+0x1b7/0x7d4 [ 31.824341] [ 31.824573] Last potentially related work creation: [ 31.825205] kasan_save_stack+0x22/0x50 [ 31.825742] __kasan_record_aux_stack+0x8e/0xa0 [ 31.826358] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.827045] remove_vma+0x139/0x170 [ 31.827545] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.828146] do_vmi_munmap+0x1f1/0x2b0 [ 31.828666] __vm_munmap+0x138/0x3a0 [ 31.829163] __x64_sys_munmap+0x59/0x80 [ 31.829695] do_syscall_64+0x3f/0x90 [ 31.830205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.830899] [ 31.831127] Second to last potentially related work creation: [ 31.831883] kasan_save_stack+0x22/0x50 [ 31.832421] __kasan_record_aux_stack+0x8e/0xa0 [ 31.833036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.833733] remove_vma+0x139/0x170 [ 31.834228] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.834829] do_vmi_munmap+0x1f1/0x2b0 [ 31.835365] mmap_region+0x1f9/0x2660 [ 31.835880] do_mmap+0x854/0xf00 [ 31.836342] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.836862] ksys_mmap_pgoff+0x3af/0x500 [ 31.837403] do_syscall_64+0x3f/0x90 [ 31.837905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.838593] [ 31.838822] The buggy address belongs to the object at ffff88800e332e80 [ 31.838822] which belongs to the cache vm_area_struct of size 168 [ 31.840429] The buggy address is located 88 bytes inside of [ 31.840429] freed 168-byte region [ffff88800e332e80, ffff88800e332f28) [ 31.841956] [ 31.842184] The buggy address belongs to the physical page: [ 31.842902] page:00000000013aa65e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe332 [ 31.844091] memcg:ffff88800ecd5e01 [ 31.844552] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.845250] page_type: 0xffffffff() [ 31.845739] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.846734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecd5e01 [ 31.847722] page dumped because: kasan: bad access detected [ 31.848439] [ 31.848669] Memory state around the buggy address: [ 31.849294] ffff88800e332d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.850214] ffff88800e332e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.851135] >ffff88800e332e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.852094] ^ [ 31.852881] ffff88800e332f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.853797] ffff88800e332f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.854721] ================================================================== [ 31.855788] Disabling lock debugging due to kernel taint [ 33.608456] BUG: Bad rss-counter state mm:00000000dcf6f48b type:MM_FILEPAGES val:33 [ 33.609606] BUG: Bad rss-counter state mm:00000000dcf6f48b type:MM_ANONPAGES val:22 [ 34.043446] BUG: Bad rss-counter state mm:000000000216be56 type:MM_FILEPAGES val:33 [ 34.044651] BUG: Bad rss-counter state mm:000000000216be56 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23240' (ECDSA) to the list of known hosts. 2023/06/19 14:14:55 fuzzer started 2023/06/19 14:14:55 dialing manager at localhost:44161 2023/06/19 14:14:55 checking machine... 2023/06/19 14:14:55 checking revisions... [ 34.764574] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:14:55 testing simple program... [ 34.815076] cgroup: Unknown subsys name 'net' [ 34.859741] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888010279000 RCX=ffffffff8386a242 RDX=ffff88801421d1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880160305c8 RSP=ffff88800c9cf9b8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800c9cfe60 R13=ffff8880160305c0 R14=ffff88800c9cfa88 R15=00000000000000a4 RIP=ffffffff814c01fc 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 00007faebcdaa900 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=00007faebd361618 CR3=000000000d99c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=0000000000000001 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=00007f048e8667a0 CR3=000000000d5da000 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=7b11de377f6fb8a6e14f02c5a5856276 XMM02=ec2efd57dc4c00df000000000011e2e8 XMM03=8fd0afa915839422000000000011e3b8 XMM04=3c265440393b4c7000000000000ae988 XMM05=59d5b690e0af863b0000000000136658 XMM06=79c860c6df426e8200000000001354c0 XMM07=e042d86d42eb936e00000000001261f0 XMM08=8fd0afa915839422000000000011e3b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000