syzkaller login: [ 33.043607] BUG: Bad rss-counter state mm:00000000ed1bb5fa type:MM_FILEPAGES val:33 [ 33.044859] BUG: Bad rss-counter state mm:00000000ed1bb5fa type:MM_ANONPAGES val:22 [ 33.086507] ================================================================== [ 33.087488] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.088679] Read of size 8 at addr ffff888009a22058 by task sshd/219 [ 33.089513] [ 33.089733] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.090596] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.091598] Call Trace: [ 33.091917] [ 33.092201] dump_stack_lvl+0x91/0xf0 [ 33.092702] print_report+0xcc/0x620 [ 33.093189] ? __virt_addr_valid+0x102/0x340 [ 33.093777] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.094394] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.095021] kasan_report+0xbe/0xf0 [ 33.095506] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.096128] vma_interval_tree_remove+0xc75/0xec0 [ 33.096735] vma_prepare+0xc54/0x11a0 [ 33.097215] __split_vma+0x5af/0x950 [ 33.097695] ? __pfx___split_vma+0x10/0x10 [ 33.098228] ? find_held_lock+0x2c/0x110 [ 33.098754] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.099327] ? lock_is_held_type+0x9f/0x120 [ 33.099870] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.100487] ? mtree_range_walk+0x632/0x900 [ 33.101045] ? mas_walk+0x5c7/0x7c0 [ 33.101529] do_vmi_munmap+0x1f1/0x2b0 [ 33.102031] mmap_region+0x1f9/0x2660 [ 33.102522] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.103046] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.103771] ? __pfx_lock_acquire+0x10/0x10 [ 33.104312] ? __pfx_mmap_region+0x10/0x10 [ 33.104847] ? security_mmap_addr+0x7d/0xa0 [ 33.105379] ? get_unmapped_area+0x1f5/0x3f0 [ 33.105963] do_mmap+0x854/0xf00 [ 33.106403] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.106904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.107476] ksys_mmap_pgoff+0x3af/0x500 [ 33.107984] do_syscall_64+0x3f/0x90 [ 33.108464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.109111] RIP: 0033:0x7f08aadcbd82 [ 33.109581] 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 [ 33.111740] RSP: 002b:00007ffd085f2b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.112662] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08aadcbd82 [ 33.113533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08aa205000 [ 33.114396] RBP: 00007f08aa205000 R08: 0000000000000009 R09: 0000000000001000 [ 33.115254] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556a9bb60ec0 [ 33.116111] R13: 00007ffd085f2b60 R14: 00007ffd085f2b90 R15: 00007ffd085f2ef0 [ 33.116983] [ 33.117278] [ 33.117507] Allocated by task 212: [ 33.117944] kasan_save_stack+0x22/0x50 [ 33.118450] kasan_set_track+0x25/0x30 [ 33.118952] __kasan_slab_alloc+0x59/0x70 [ 33.119479] kmem_cache_alloc+0x16b/0x370 [ 33.120001] vm_area_dup+0x20/0x160 [ 33.120454] __split_vma+0x170/0x950 [ 33.120927] split_vma+0xc6/0x110 [ 33.121370] mprotect_fixup+0x8d2/0xb30 [ 33.121889] do_mprotect_pkey+0x87e/0xd40 [ 33.122410] __x64_sys_mprotect+0x78/0xc0 [ 33.122944] do_syscall_64+0x3f/0x90 [ 33.123420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.124072] [ 33.124287] Freed by task 203: [ 33.124688] kasan_save_stack+0x22/0x50 [ 33.125198] kasan_set_track+0x25/0x30 [ 33.125700] kasan_save_free_info+0x2b/0x50 [ 33.126236] __kasan_slab_free+0x10a/0x190 [ 33.126776] kmem_cache_free+0x10d/0x4d0 [ 33.127295] rcu_core+0x8c8/0x2860 [ 33.127746] __do_softirq+0x1b7/0x7d4 [ 33.128225] [ 33.128441] Last potentially related work creation: [ 33.129035] kasan_save_stack+0x22/0x50 [ 33.129565] __kasan_record_aux_stack+0x8e/0xa0 [ 33.130154] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.130804] remove_vma+0x139/0x170 [ 33.131262] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.131821] do_vmi_munmap+0x1f1/0x2b0 [ 33.132310] __vm_munmap+0x138/0x3a0 [ 33.132780] __x64_sys_munmap+0x59/0x80 [ 33.133284] do_syscall_64+0x3f/0x90 [ 33.133765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.134406] [ 33.134620] The buggy address belongs to the object at ffff888009a22000 [ 33.134620] which belongs to the cache vm_area_struct of size 168 [ 33.136101] The buggy address is located 88 bytes inside of [ 33.136101] freed 168-byte region [ffff888009a22000, ffff888009a220a8) [ 33.137530] [ 33.137747] The buggy address belongs to the physical page: [ 33.138411] page:000000003683f07a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9a22 [ 33.139514] memcg:ffff88800df13001 [ 33.139943] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.140584] page_type: 0xffffffff() [ 33.141040] raw: 0100000000000200 ffff88800879fc80 ffffea00003844c0 dead000000000008 [ 33.141990] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df13001 [ 33.142906] page dumped because: kasan: bad access detected [ 33.143569] [ 33.143783] Memory state around the buggy address: [ 33.144368] ffff888009a21f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.145224] ffff888009a21f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.146092] >ffff888009a22000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.146938] ^ [ 33.147659] ffff888009a22080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 33.148521] ffff888009a22100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.149384] ================================================================== [ 33.150651] Disabling lock debugging due to kernel taint [ 35.060616] BUG: Bad rss-counter state mm:00000000fd47461c type:MM_FILEPAGES val:33 [ 35.061947] BUG: Bad rss-counter state mm:00000000fd47461c type:MM_ANONPAGES val:22 [ 35.471425] BUG: Bad rss-counter state mm:00000000bf4e5276 type:MM_FILEPAGES val:33 [ 35.472756] BUG: Bad rss-counter state mm:00000000bf4e5276 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56326' (ECDSA) to the list of known hosts. 2023/06/19 11:50:57 fuzzer started 2023/06/19 11:50:57 dialing manager at localhost:44161 2023/06/19 11:50:57 checking machine... 2023/06/19 11:50:57 checking revisions... [ 36.199661] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:50:57 testing simple program... [ 36.250582] cgroup: Unknown subsys name 'net' [ 36.312533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f38831628b0 CR3=0000000009616000 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=fab641778e9ec0ba574b0274a6637da3 XMM02=2c67c8bc2e329bc3000000000011f098 XMM03=fb795ef6d657705600000000001252a0 XMM04=fd907ce9eb3232a000000000000ae988 XMM05=dfcdbad4f1609c370000000000134ad8 XMM06=236370194a2ee75f0000000000133cb0 XMM07=e042d86d42eb936e0000000000125578 XMM08=b3198b2af2c96eb8000000000011f0f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000080000000 RDX=1ffff11001f36fd5 RSI=ffffffff844a2fee RDI=0000000000000005 RBP=ffff888008dbfc00 RSP=ffff88800f9b7b18 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=dffffc0000000000 R14=ffff88800f9b7e88 R15=ffff88800f9b7e70 RIP=ffffffff814c07f1 RFL=00000287 [--S--PC] 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 00007f5bbb305900 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=00007f5bbb2e4020 CR3=000000000ee44000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000