syzkaller login: [ 32.984654] BUG: Bad rss-counter state mm:00000000e433f88a type:MM_FILEPAGES val:33 [ 32.985425] BUG: Bad rss-counter state mm:00000000e433f88a type:MM_ANONPAGES val:22 [ 33.110604] ================================================================== [ 33.111234] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.111866] Read of size 8 at addr ffff88800e1badf0 by task sshd/221 [ 33.112396] [ 33.112553] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.113216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.113893] Call Trace: [ 33.114108] [ 33.114303] dump_stack_lvl+0x91/0xf0 [ 33.114855] print_report+0xcc/0x620 [ 33.115247] ? __virt_addr_valid+0x102/0x340 [ 33.115626] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.116053] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.116475] kasan_report+0xbe/0xf0 [ 33.116852] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.117321] vma_interval_tree_remove+0xc75/0xec0 [ 33.117734] vma_prepare+0xc54/0x11a0 [ 33.118067] __split_vma+0x5af/0x950 [ 33.118398] ? __pfx___split_vma+0x10/0x10 [ 33.118765] ? find_held_lock+0x2c/0x110 [ 33.119131] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.119509] ? lock_is_held_type+0x9f/0x120 [ 33.119869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.120305] ? mtree_range_walk+0x632/0x900 [ 33.120668] ? mas_walk+0x5c7/0x7c0 [ 33.121012] do_vmi_munmap+0x1f1/0x2b0 [ 33.121339] mmap_region+0x1f9/0x2660 [ 33.121659] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.122032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.122540] ? __pfx_lock_acquire+0x10/0x10 [ 33.122885] ? __pfx_mmap_region+0x10/0x10 [ 33.123232] ? security_mmap_addr+0x7d/0xa0 [ 33.123593] ? get_unmapped_area+0x1f5/0x3f0 [ 33.123968] do_mmap+0x854/0xf00 [ 33.124238] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.124545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.124983] ksys_mmap_pgoff+0x3af/0x500 [ 33.125346] do_syscall_64+0x3f/0x90 [ 33.125687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.126142] RIP: 0033:0x7f875b96ed82 [ 33.126434] 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 [ 33.127779] RSP: 002b:00007ffcc5a7dcd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.128404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f875b96ed82 [ 33.129002] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f875ada8000 [ 33.129554] RBP: 00007f875ada8000 R08: 0000000000000009 R09: 0000000000001000 [ 33.130105] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dcdef8ec0 [ 33.130678] R13: 00007ffcc5a7dcf0 R14: 00007ffcc5a7dd20 R15: 00007ffcc5a7e080 [ 33.131250] [ 33.131448] [ 33.131595] Allocated by task 214: [ 33.131883] kasan_save_stack+0x22/0x50 [ 33.132241] kasan_set_track+0x25/0x30 [ 33.132570] __kasan_slab_alloc+0x59/0x70 [ 33.132948] kmem_cache_alloc+0x16b/0x370 [ 33.133284] vm_area_dup+0x20/0x160 [ 33.133584] __split_vma+0x170/0x950 [ 33.133899] split_vma+0xc6/0x110 [ 33.134192] mprotect_fixup+0x8d2/0xb30 [ 33.134524] do_mprotect_pkey+0x87e/0xd40 [ 33.134866] __x64_sys_mprotect+0x78/0xc0 [ 33.135218] do_syscall_64+0x3f/0x90 [ 33.135518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.135919] [ 33.136051] Freed by task 214: [ 33.136298] kasan_save_stack+0x22/0x50 [ 33.136606] kasan_set_track+0x25/0x30 [ 33.136958] kasan_save_free_info+0x2b/0x50 [ 33.137312] __kasan_slab_free+0x10a/0x190 [ 33.137673] kmem_cache_free+0x10d/0x4d0 [ 33.138027] rcu_core+0x8c8/0x2860 [ 33.138329] __do_softirq+0x1b7/0x7d4 [ 33.138645] [ 33.138794] Last potentially related work creation: [ 33.139185] kasan_save_stack+0x22/0x50 [ 33.139511] __kasan_record_aux_stack+0x8e/0xa0 [ 33.139885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.140309] remove_vma+0x139/0x170 [ 33.140606] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.140995] do_vmi_munmap+0x1f1/0x2b0 [ 33.141310] __vm_munmap+0x138/0x3a0 [ 33.141624] __x64_sys_munmap+0x59/0x80 [ 33.141950] do_syscall_64+0x3f/0x90 [ 33.142264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.142678] [ 33.142819] The buggy address belongs to the object at ffff88800e1bad98 [ 33.142819] which belongs to the cache vm_area_struct of size 168 [ 33.143804] The buggy address is located 88 bytes inside of [ 33.143804] freed 168-byte region [ffff88800e1bad98, ffff88800e1bae40) [ 33.144712] [ 33.144911] The buggy address belongs to the physical page: [ 33.145348] page:0000000005ad25fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1ba [ 33.146065] memcg:ffff8880096bca01 [ 33.146336] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.146759] page_type: 0xffffffff() [ 33.147044] raw: 0100000000000200 ffff88800879fc80 ffffea00005dd040 dead000000000004 [ 33.147637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880096bca01 [ 33.148225] page dumped because: kasan: bad access detected [ 33.148652] [ 33.148825] Memory state around the buggy address: [ 33.149215] ffff88800e1bac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.149777] ffff88800e1bad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.150318] >ffff88800e1bad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.150859] ^ [ 33.151394] ffff88800e1bae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.151962] ffff88800e1bae80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.152517] ================================================================== [ 33.153292] Disabling lock debugging due to kernel taint [ 35.023894] BUG: Bad rss-counter state mm:00000000ea777ef7 type:MM_FILEPAGES val:33 [ 35.024656] BUG: Bad rss-counter state mm:00000000ea777ef7 type:MM_ANONPAGES val:22 [ 35.373222] BUG: Bad rss-counter state mm:00000000ebaa3a5d type:MM_FILEPAGES val:33 [ 35.374495] BUG: Bad rss-counter state mm:00000000ebaa3a5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16107' (ECDSA) to the list of known hosts. 2023/06/20 09:19:23 fuzzer started 2023/06/20 09:19:23 dialing manager at localhost:44161 2023/06/20 09:19:23 checking machine... 2023/06/20 09:19:23 checking revisions... [ 35.957009] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:19:23 testing simple program... [ 35.991755] cgroup: Unknown subsys name 'net' [ 36.024257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:19:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83c62fbb RDX=ffff88800d949b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888016b376a0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff888016b87600 R13=0000000000000000 R14=0000000000000000 R15=ffff88801a118000 RIP=ffffffff814c07e4 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 00007f3c8d02b900 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=00007ffe92af3000 CR3=000000000e842000 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=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=00007fd5315e5470 CR3=0000000015836000 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=2032323a39313a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a39313a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000