syzkaller login: [ 31.144729] BUG: Bad rss-counter state mm:0000000020d8be04 type:MM_FILEPAGES val:33 [ 31.146169] BUG: Bad rss-counter state mm:0000000020d8be04 type:MM_ANONPAGES val:22 [ 31.292958] ================================================================== [ 31.293879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.294833] Read of size 8 at addr ffff88801a3164e0 by task sshd/220 [ 31.295612] [ 31.295831] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.296806] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.297784] Call Trace: [ 31.298101] [ 31.298425] dump_stack_lvl+0x91/0xf0 [ 31.298940] print_report+0xcc/0x620 [ 31.299420] ? __virt_addr_valid+0x102/0x340 [ 31.299971] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.300617] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.301240] kasan_report+0xbe/0xf0 [ 31.301733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302373] vma_interval_tree_remove+0xc75/0xec0 [ 31.302980] vma_prepare+0xc54/0x11a0 [ 31.303460] __split_vma+0x5af/0x950 [ 31.303933] ? __pfx___split_vma+0x10/0x10 [ 31.304473] ? find_held_lock+0x2c/0x110 [ 31.305001] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.305572] ? lock_is_held_type+0x9f/0x120 [ 31.306134] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.306760] ? mtree_range_walk+0x632/0x900 [ 31.307335] ? mas_walk+0x5c7/0x7c0 [ 31.307832] do_vmi_munmap+0x1f1/0x2b0 [ 31.308347] mmap_region+0x1f9/0x2660 [ 31.308856] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.309383] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.310120] ? __pfx_lock_acquire+0x10/0x10 [ 31.310657] ? __pfx_mmap_region+0x10/0x10 [ 31.311191] ? security_mmap_addr+0x7d/0xa0 [ 31.311724] ? get_unmapped_area+0x1f5/0x3f0 [ 31.312272] do_mmap+0x854/0xf00 [ 31.312737] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.313240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.313819] ksys_mmap_pgoff+0x3af/0x500 [ 31.314351] do_syscall_64+0x3f/0x90 [ 31.314842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.315509] RIP: 0033:0x7fe45ade7d82 [ 31.315974] 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 [ 31.318114] RSP: 002b:00007ffe11aeef38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.319022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe45ade7d82 [ 31.319870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe45a221000 [ 31.320740] RBP: 00007fe45a221000 R08: 0000000000000009 R09: 0000000000001000 [ 31.321591] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b46360ff70 [ 31.322443] R13: 00007ffe11aeef50 R14: 00007ffe11aeef80 R15: 00007ffe11aef2e0 [ 31.323299] [ 31.323591] [ 31.323808] Allocated by task 213: [ 31.324239] kasan_save_stack+0x22/0x50 [ 31.324752] kasan_set_track+0x25/0x30 [ 31.325251] __kasan_slab_alloc+0x59/0x70 [ 31.325779] kmem_cache_alloc+0x16b/0x370 [ 31.326296] vm_area_dup+0x20/0x160 [ 31.326751] __split_vma+0x170/0x950 [ 31.327218] split_vma+0xc6/0x110 [ 31.327655] mprotect_fixup+0x8d2/0xb30 [ 31.328153] do_mprotect_pkey+0x87e/0xd40 [ 31.328687] __x64_sys_mprotect+0x78/0xc0 [ 31.329209] do_syscall_64+0x3f/0x90 [ 31.329679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.330317] [ 31.330535] Freed by task 213: [ 31.330931] kasan_save_stack+0x22/0x50 [ 31.331442] kasan_set_track+0x25/0x30 [ 31.331933] kasan_save_free_info+0x2b/0x50 [ 31.332481] __kasan_slab_free+0x10a/0x190 [ 31.333011] kmem_cache_free+0x10d/0x4d0 [ 31.333520] rcu_core+0x8c8/0x2860 [ 31.333963] __do_softirq+0x1b7/0x7d4 [ 31.334442] [ 31.334662] Last potentially related work creation: [ 31.335251] kasan_save_stack+0x22/0x50 [ 31.335752] __kasan_record_aux_stack+0x8e/0xa0 [ 31.336326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.336986] remove_vma+0x139/0x170 [ 31.337448] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.338014] do_vmi_munmap+0x1f1/0x2b0 [ 31.338497] __vm_munmap+0x138/0x3a0 [ 31.338969] __x64_sys_munmap+0x59/0x80 [ 31.339470] do_syscall_64+0x3f/0x90 [ 31.339953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340608] [ 31.340822] The buggy address belongs to the object at ffff88801a316488 [ 31.340822] which belongs to the cache vm_area_struct of size 168 [ 31.342289] The buggy address is located 88 bytes inside of [ 31.342289] freed 168-byte region [ffff88801a316488, ffff88801a316530) [ 31.343700] [ 31.343914] The buggy address belongs to the physical page: [ 31.344581] page:0000000054548c8c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a316 [ 31.345683] memcg:ffff888019ed6501 [ 31.346113] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.346766] page_type: 0xffffffff() [ 31.347212] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.348132] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ed6501 [ 31.349063] page dumped because: kasan: bad access detected [ 31.349733] [ 31.349949] Memory state around the buggy address: [ 31.350531] ffff88801a316380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.351381] ffff88801a316400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.352230] >ffff88801a316480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.353091] ^ [ 31.353845] ffff88801a316500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.354711] ffff88801a316580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355559] ================================================================== [ 31.356606] Disabling lock debugging due to kernel taint [ 33.928949] BUG: Bad rss-counter state mm:00000000701fd9c5 type:MM_FILEPAGES val:33 [ 33.929875] BUG: Bad rss-counter state mm:00000000701fd9c5 type:MM_ANONPAGES val:22 [ 34.393653] BUG: Bad rss-counter state mm:00000000fbe8dd75 type:MM_FILEPAGES val:33 [ 34.394828] BUG: Bad rss-counter state mm:00000000fbe8dd75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10553' (ECDSA) to the list of known hosts. 2023/06/20 21:23:02 fuzzer started 2023/06/20 21:23:03 dialing manager at localhost:36067 2023/06/20 21:23:03 checking machine... 2023/06/20 21:23:03 checking revisions... [ 35.105971] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:23:03 testing simple program... [ 35.160643] cgroup: Unknown subsys name 'net' [ 35.210707] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:23:02 Registers: info registers vcpu 0 RAX=1ffff11001287f43 RBX=ffff88800943f9e8 RCX=1ffff11001279686 RDX=dffffc0000000000 RSI=ffff888015dddd20 RDI=ffff88800943fa18 RBP=ffff8880093cb400 RSP=ffff888013a7f5f8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888015dddbe8 R13=0000000000000000 R14=ffff88800db47898 R15=ffff88800db47850 RIP=ffffffff8184767e 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 00007f369624a900 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=00007f36956e0650 CR3=000000000c612000 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=1152d5f06210bdc800000000000ae988 XMM05=b306b46162346bed00000000001331b0 XMM06=4fda316b135da52b0000000000131fa0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008f7a000 RCX=1ffff110011d8f9b RDX=1ffff11002bb0d09 RSI=0000000000000000 RDI=ffffffff854ee9e0 RBP=ffff888015d86840 RSP=ffff888008ec7d80 R8 =0000000000000004 R9 =0000000000000000 R10=00000000fffffffe R11=0000000000000000 R12=ffff888015d86a50 R13=ffff888015d86868 R14=ffff888015d86a68 R15=0000000000000000 RIP=ffffffff81483464 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 00007f0536a55900 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=00007ffc16309000 CR3=000000000967a000 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=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