syzkaller login: [ 66.936174] BUG: Bad rss-counter state mm:00000000488e944b type:MM_FILEPAGES val:33 [ 66.937911] BUG: Bad rss-counter state mm:00000000488e944b type:MM_ANONPAGES val:22 [ 67.114775] ================================================================== [ 67.115921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.117080] Read of size 8 at addr ffff8880100d4a50 by task sshd/227 [ 67.117894] [ 67.118125] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 67.119055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.120133] Call Trace: [ 67.120475] [ 67.120776] dump_stack_lvl+0x91/0xf0 [ 67.121297] print_report+0xcc/0x620 [ 67.121814] ? __virt_addr_valid+0x102/0x340 [ 67.122402] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.123059] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.123747] kasan_report+0xbe/0xf0 [ 67.124282] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.124963] vma_interval_tree_remove+0xc75/0xec0 [ 67.125613] vma_prepare+0xc54/0x11a0 [ 67.126143] __split_vma+0x5af/0x950 [ 67.126648] ? __pfx___split_vma+0x10/0x10 [ 67.127237] ? find_held_lock+0x2c/0x110 [ 67.127803] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.128415] ? lock_is_held_type+0x9f/0x120 [ 67.129030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.129691] ? mtree_range_walk+0x632/0x900 [ 67.130284] ? mas_walk+0x5c7/0x7c0 [ 67.130806] do_vmi_munmap+0x1f1/0x2b0 [ 67.131352] mmap_region+0x1f9/0x2660 [ 67.131869] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.132420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.133185] ? __pfx_lock_acquire+0x10/0x10 [ 67.133775] ? __pfx_mmap_region+0x10/0x10 [ 67.134351] ? security_mmap_addr+0x7d/0xa0 [ 67.134933] ? get_unmapped_area+0x1f5/0x3f0 [ 67.135564] do_mmap+0x854/0xf00 [ 67.136048] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.136596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.137213] ksys_mmap_pgoff+0x3af/0x500 [ 67.137774] do_syscall_64+0x3f/0x90 [ 67.138302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.139025] RIP: 0033:0x7f493e80dd82 [ 67.139544] 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 [ 67.141847] RSP: 002b:00007ffea4e42528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.142825] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f493e80dd82 [ 67.143754] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f493dc47000 [ 67.144689] RBP: 00007f493dc47000 R08: 0000000000000009 R09: 0000000000001000 [ 67.145624] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f0914aec0 [ 67.146545] R13: 00007ffea4e42540 R14: 00007ffea4e42570 R15: 00007ffea4e428d0 [ 67.147483] [ 67.147806] [ 67.148039] Allocated by task 220: [ 67.148503] kasan_save_stack+0x22/0x50 [ 67.149063] kasan_set_track+0x25/0x30 [ 67.149620] __kasan_slab_alloc+0x59/0x70 [ 67.150197] kmem_cache_alloc+0x16b/0x370 [ 67.150763] vm_area_dup+0x20/0x160 [ 67.151275] __split_vma+0x170/0x950 [ 67.151791] split_vma+0xc6/0x110 [ 67.152278] mprotect_fixup+0x8d2/0xb30 [ 67.152833] do_mprotect_pkey+0x87e/0xd40 [ 67.153409] __x64_sys_mprotect+0x78/0xc0 [ 67.153977] do_syscall_64+0x3f/0x90 [ 67.154487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.155196] [ 67.155434] Freed by task 220: [ 67.155868] kasan_save_stack+0x22/0x50 [ 67.156405] kasan_set_track+0x25/0x30 [ 67.156936] kasan_save_free_info+0x2b/0x50 [ 67.157512] __kasan_slab_free+0x10a/0x190 [ 67.158084] kmem_cache_free+0x10d/0x4d0 [ 67.158634] rcu_core+0x8c8/0x2860 [ 67.159110] __do_softirq+0x1b7/0x7d4 [ 67.159637] [ 67.159872] Last potentially related work creation: [ 67.160497] kasan_save_stack+0x22/0x50 [ 67.161041] __kasan_record_aux_stack+0x8e/0xa0 [ 67.161663] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.162360] remove_vma+0x139/0x170 [ 67.162844] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.163455] do_vmi_munmap+0x1f1/0x2b0 [ 67.163975] __vm_munmap+0x138/0x3a0 [ 67.164486] __x64_sys_munmap+0x59/0x80 [ 67.165036] do_syscall_64+0x3f/0x90 [ 67.165563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.166263] [ 67.166503] The buggy address belongs to the object at ffff8880100d49f8 [ 67.166503] which belongs to the cache vm_area_struct of size 168 [ 67.168115] The buggy address is located 88 bytes inside of [ 67.168115] freed 168-byte region [ffff8880100d49f8, ffff8880100d4aa0) [ 67.169666] [ 67.169905] The buggy address belongs to the physical page: [ 67.170634] page:000000005477d94f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x100d4 [ 67.171843] memcg:ffff88801673c101 [ 67.172307] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.173021] page_type: 0xffffffff() [ 67.173514] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 67.174520] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801673c101 [ 67.175516] page dumped because: kasan: bad access detected [ 67.176237] [ 67.176473] Memory state around the buggy address: [ 67.177099] ffff8880100d4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.178021] ffff8880100d4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 67.178940] >ffff8880100d4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.179863] ^ [ 67.180612] ffff8880100d4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 67.181529] ffff8880100d4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.182452] ================================================================== [ 67.183616] Disabling lock debugging due to kernel taint [ 69.253669] BUG: Bad rss-counter state mm:000000002749c4f7 type:MM_FILEPAGES val:33 [ 69.255105] BUG: Bad rss-counter state mm:000000002749c4f7 type:MM_ANONPAGES val:22 [ 69.671477] BUG: Bad rss-counter state mm:00000000520ab5d5 type:MM_FILEPAGES val:33 [ 69.672055] BUG: Bad rss-counter state mm:00000000520ab5d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13095' (ECDSA) to the list of known hosts. 2023/06/19 18:02:48 fuzzer started 2023/06/19 18:02:48 dialing manager at localhost:44161 2023/06/19 18:02:48 checking machine... 2023/06/19 18:02:48 checking revisions... [ 70.241949] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:02:48 testing simple program... [ 70.302682] cgroup: Unknown subsys name 'net' [ 70.340425] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:02:47 Registers: info registers vcpu 0 RAX=ffff88801742ec00 RBX=ffff88800c979068 RCX=1ffff11001b2dc14 RDX=dffffc0000000000 RSI=ffff888017481000 RDI=ffff88800c979098 RBP=ffff88800e1e8eb8 RSP=ffff8880143cfcb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888017480000 R13=0000000000000000 R14=ffff888019c4bd58 R15=ffff888019c4bd10 RIP=ffffffff81847508 RFL=00000046 [---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 00007fc53528a900 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=00007fc534722680 CR3=000000000c980000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7748821c542f4b2c00000000000ae988 XMM05=2ac36dce7372b84b0000000000135c48 XMM06=e8008b1642ea3e6000000000001346c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff81534376 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800fc3ff58 RBP=ffff88800fc3ff58 RSP=ffff88800fc3ff28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000c1200000c12 R12=ffff88800fc3ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813909a0 RFL=00000002 [-------] 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 00007f348c8b0900 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=00007f348ce67618 CR3=000000001689c000 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=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