syzkaller login: [ 45.974761] BUG: Bad rss-counter state mm:00000000f0e55191 type:MM_FILEPAGES val:33 [ 45.975770] BUG: Bad rss-counter state mm:00000000f0e55191 type:MM_ANONPAGES val:22 [ 46.135738] ================================================================== [ 46.136733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.137728] Read of size 8 at addr ffff88800eb595c8 by task sshd/220 [ 46.138711] [ 46.138953] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.139870] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.140900] Call Trace: [ 46.141222] [ 46.141507] dump_stack_lvl+0x91/0xf0 [ 46.142010] print_report+0xcc/0x620 [ 46.142502] ? __virt_addr_valid+0x102/0x340 [ 46.143087] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.143719] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.144345] kasan_report+0xbe/0xf0 [ 46.144824] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.145440] vma_interval_tree_remove+0xc75/0xec0 [ 46.146042] vma_prepare+0xc54/0x11a0 [ 46.146530] __split_vma+0x5af/0x950 [ 46.147016] ? __pfx___split_vma+0x10/0x10 [ 46.147550] ? find_held_lock+0x2c/0x110 [ 46.148076] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.148642] ? lock_is_held_type+0x9f/0x120 [ 46.149181] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.149792] ? mtree_range_walk+0x632/0x900 [ 46.150344] ? mas_walk+0x5c7/0x7c0 [ 46.150837] do_vmi_munmap+0x1f1/0x2b0 [ 46.151335] mmap_region+0x1f9/0x2660 [ 46.151813] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.152331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.153045] ? __pfx_lock_acquire+0x10/0x10 [ 46.153575] ? __pfx_mmap_region+0x10/0x10 [ 46.154105] ? security_mmap_addr+0x7d/0xa0 [ 46.154645] ? get_unmapped_area+0x1f5/0x3f0 [ 46.155206] do_mmap+0x854/0xf00 [ 46.155649] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.156139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.156711] ksys_mmap_pgoff+0x3af/0x500 [ 46.157220] do_syscall_64+0x3f/0x90 [ 46.157694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.158436] RIP: 0033:0x7f30d34ecd82 [ 46.158960] 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 [ 46.161073] RSP: 002b:00007ffead2f20d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.162011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f30d34ecd82 [ 46.162892] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f30d2926000 [ 46.163767] RBP: 00007f30d2926000 R08: 0000000000000009 R09: 0000000000001000 [ 46.164604] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b1713aec0 [ 46.165450] R13: 00007ffead2f20f0 R14: 00007ffead2f2120 R15: 00007ffead2f2480 [ 46.166304] [ 46.166592] [ 46.166814] Allocated by task 213: [ 46.167245] kasan_save_stack+0x22/0x50 [ 46.167769] kasan_set_track+0x25/0x30 [ 46.168280] __kasan_slab_alloc+0x59/0x70 [ 46.168820] kmem_cache_alloc+0x16b/0x370 [ 46.169362] vm_area_dup+0x20/0x160 [ 46.169839] __split_vma+0x170/0x950 [ 46.170322] split_vma+0xc6/0x110 [ 46.170789] mprotect_fixup+0x8d2/0xb30 [ 46.171310] do_mprotect_pkey+0x87e/0xd40 [ 46.171853] __x64_sys_mprotect+0x78/0xc0 [ 46.172397] do_syscall_64+0x3f/0x90 [ 46.172885] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.173553] [ 46.173776] Freed by task 213: [ 46.174181] kasan_save_stack+0x22/0x50 [ 46.174721] kasan_set_track+0x25/0x30 [ 46.175233] kasan_save_free_info+0x2b/0x50 [ 46.175788] __kasan_slab_free+0x10a/0x190 [ 46.176341] kmem_cache_free+0x10d/0x4d0 [ 46.176856] rcu_core+0x8c8/0x2860 [ 46.177316] __do_softirq+0x1b7/0x7d4 [ 46.177811] [ 46.178033] Last potentially related work creation: [ 46.178644] kasan_save_stack+0x22/0x50 [ 46.179175] __kasan_record_aux_stack+0x8e/0xa0 [ 46.179847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.180513] remove_vma+0x139/0x170 [ 46.180986] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.181569] do_vmi_munmap+0x1f1/0x2b0 [ 46.182076] __vm_munmap+0x138/0x3a0 [ 46.182565] __x64_sys_munmap+0x59/0x80 [ 46.183107] do_syscall_64+0x3f/0x90 [ 46.183603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.184273] [ 46.184493] The buggy address belongs to the object at ffff88800eb59570 [ 46.184493] which belongs to the cache vm_area_struct of size 168 [ 46.186063] The buggy address is located 88 bytes inside of [ 46.186063] freed 168-byte region [ffff88800eb59570, ffff88800eb59618) [ 46.187550] [ 46.187769] The buggy address belongs to the physical page: [ 46.188448] page:00000000dcac7a4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb59 [ 46.189582] memcg:ffff88800f74ce01 [ 46.190018] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.190709] page_type: 0xffffffff() [ 46.191172] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.192124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f74ce01 [ 46.193068] page dumped because: kasan: bad access detected [ 46.193762] [ 46.193989] Memory state around the buggy address: [ 46.194588] ffff88800eb59480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.195486] ffff88800eb59500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 46.196398] >ffff88800eb59580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.197333] ^ [ 46.198071] ffff88800eb59600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 46.198987] ffff88800eb59680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.199892] ================================================================== [ 46.200849] Disabling lock debugging due to kernel taint [ 48.932801] BUG: Bad rss-counter state mm:000000002d16d09f type:MM_FILEPAGES val:33 [ 48.933811] BUG: Bad rss-counter state mm:000000002d16d09f type:MM_ANONPAGES val:22 [ 49.390946] BUG: Bad rss-counter state mm:000000004d2aa8cf type:MM_FILEPAGES val:33 [ 49.392005] BUG: Bad rss-counter state mm:000000004d2aa8cf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7645' (ECDSA) to the list of known hosts. 2023/06/19 19:30:10 fuzzer started 2023/06/19 19:30:10 dialing manager at localhost:44161 2023/06/19 19:30:11 checking machine... 2023/06/19 19:30:11 checking revisions... [ 50.113499] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:30:11 testing simple program... [ 50.163628] cgroup: Unknown subsys name 'net' [ 50.212720] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:29:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801989e178 RCX=0000000000000000 RDX=ffff8880101eb680 RSI=ffffffff818c6785 RDI=ffffffff84909488 RBP=ffffffff84909480 RSP=ffff88801024f820 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=3830306234386136 R12=0000000010000000 R13=ffff88801989e250 R14=0000000000000000 R15=ffff88801024f8a8 RIP=ffffffff814c081b 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 00007f83e28c3900 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=00007f55cdc83650 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b361800ab3d1a92200000000000ae988 XMM05=df15015d70896ae60000000000135408 XMM06=abb27933a49544f600000000001341a8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffd27a31c18 CR3=0000000016e02000 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=2030313a30333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a30333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000