syzkaller login: [ 31.070795] BUG: Bad rss-counter state mm:000000003ed4d826 type:MM_FILEPAGES val:33 [ 31.071564] BUG: Bad rss-counter state mm:000000003ed4d826 type:MM_ANONPAGES val:22 [ 31.202301] ================================================================== [ 31.203367] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.204585] Read of size 8 at addr ffff88801683fdf0 by task sshd/221 [ 31.205677] [ 31.205944] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207119] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208266] Call Trace: [ 31.208646] [ 31.208981] dump_stack_lvl+0x91/0xf0 [ 31.209568] print_report+0xcc/0x620 [ 31.210172] ? __virt_addr_valid+0x102/0x340 [ 31.210802] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211739] kasan_report+0xbe/0xf0 [ 31.212108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212590] vma_interval_tree_remove+0xc75/0xec0 [ 31.213051] vma_prepare+0xc54/0x11a0 [ 31.213420] __split_vma+0x5af/0x950 [ 31.213790] ? __pfx___split_vma+0x10/0x10 [ 31.214197] ? find_held_lock+0x2c/0x110 [ 31.214601] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215041] ? lock_is_held_type+0x9f/0x120 [ 31.215459] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.215929] ? mtree_range_walk+0x632/0x900 [ 31.216348] ? mas_walk+0x5c7/0x7c0 [ 31.216714] do_vmi_munmap+0x1f1/0x2b0 [ 31.217092] mmap_region+0x1f9/0x2660 [ 31.217461] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.217858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.218407] ? __pfx_lock_acquire+0x10/0x10 [ 31.218822] ? __pfx_mmap_region+0x10/0x10 [ 31.219226] ? security_mmap_addr+0x7d/0xa0 [ 31.219632] ? get_unmapped_area+0x1f5/0x3f0 [ 31.220052] do_mmap+0x854/0xf00 [ 31.220387] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.220769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.221202] ksys_mmap_pgoff+0x3af/0x500 [ 31.221590] do_syscall_64+0x3f/0x90 [ 31.221978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.222479] RIP: 0033:0x7f014d019d82 [ 31.222829] 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 [ 31.224474] RSP: 002b:00007ffc365244f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.225179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f014d019d82 [ 31.225861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f014c453000 [ 31.226505] RBP: 00007f014c453000 R08: 0000000000000009 R09: 0000000000001000 [ 31.227165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a5af3aec0 [ 31.227804] R13: 00007ffc36524510 R14: 00007ffc36524540 R15: 00007ffc365248a0 [ 31.228460] [ 31.228684] [ 31.228851] Allocated by task 214: [ 31.229180] kasan_save_stack+0x22/0x50 [ 31.229565] kasan_set_track+0x25/0x30 [ 31.229953] __kasan_slab_alloc+0x59/0x70 [ 31.230360] kmem_cache_alloc+0x16b/0x370 [ 31.230753] vm_area_dup+0x20/0x160 [ 31.231095] __split_vma+0x170/0x950 [ 31.231452] split_vma+0xc6/0x110 [ 31.231784] mprotect_fixup+0x8d2/0xb30 [ 31.232168] do_mprotect_pkey+0x87e/0xd40 [ 31.232566] __x64_sys_mprotect+0x78/0xc0 [ 31.232965] do_syscall_64+0x3f/0x90 [ 31.233323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.233822] [ 31.233986] Freed by task 214: [ 31.234283] kasan_save_stack+0x22/0x50 [ 31.234670] kasan_set_track+0x25/0x30 [ 31.235050] kasan_save_free_info+0x2b/0x50 [ 31.235456] __kasan_slab_free+0x10a/0x190 [ 31.235861] kmem_cache_free+0x10d/0x4d0 [ 31.236252] rcu_core+0x8c8/0x2860 [ 31.236593] __do_softirq+0x1b7/0x7d4 [ 31.236962] [ 31.237126] Last potentially related work creation: [ 31.237575] kasan_save_stack+0x22/0x50 [ 31.237969] __kasan_record_aux_stack+0x8e/0xa0 [ 31.238405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.238892] remove_vma+0x139/0x170 [ 31.239257] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.239688] do_vmi_munmap+0x1f1/0x2b0 [ 31.240070] __vm_munmap+0x138/0x3a0 [ 31.240430] __x64_sys_munmap+0x59/0x80 [ 31.240816] do_syscall_64+0x3f/0x90 [ 31.241177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.241686] [ 31.241852] The buggy address belongs to the object at ffff88801683fd98 [ 31.241852] which belongs to the cache vm_area_struct of size 168 [ 31.242988] The buggy address is located 88 bytes inside of [ 31.242988] freed 168-byte region [ffff88801683fd98, ffff88801683fe40) [ 31.244064] [ 31.244231] The buggy address belongs to the physical page: [ 31.244737] page:0000000046c7e041 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1683f [ 31.245581] memcg:ffff88800d972f01 [ 31.245918] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.246414] page_type: 0xffffffff() [ 31.246760] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.247464] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d972f01 [ 31.248236] page dumped because: kasan: bad access detected [ 31.248749] [ 31.248916] Memory state around the buggy address: [ 31.249360] ffff88801683fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.250035] ffff88801683fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.250692] >ffff88801683fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.251351] ^ [ 31.251981] ffff88801683fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.252644] ffff88801683fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.253299] ================================================================== [ 31.254008] Disabling lock debugging due to kernel taint [ 33.522839] BUG: Bad rss-counter state mm:00000000b982d079 type:MM_FILEPAGES val:33 [ 33.524047] BUG: Bad rss-counter state mm:00000000b982d079 type:MM_ANONPAGES val:22 [ 34.063897] BUG: Bad rss-counter state mm:00000000c0c34bd2 type:MM_FILEPAGES val:33 [ 34.065063] BUG: Bad rss-counter state mm:00000000c0c34bd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36814' (ECDSA) to the list of known hosts. 2023/06/21 03:07:33 fuzzer started 2023/06/21 03:07:33 dialing manager at localhost:36067 2023/06/21 03:07:33 checking machine... 2023/06/21 03:07:33 checking revisions... [ 34.667580] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:07:33 testing simple program... [ 34.710230] cgroup: Unknown subsys name 'net' [ 34.754067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:07:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f42985809d0 CR3=000000000c4e2000 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=30d2af5b875c6783154d2751bc7b57e4 XMM02=ec2efd57dc4c00df000000000011a560 XMM03=d3fa654d951b5efe000000000011a630 XMM04=676d3188b2e803e400000000000ae988 XMM05=e788d05e5501c0f60000000000131de8 XMM06=c291bd5c70af25b900000000001317e0 XMM07=e042d86d42eb936e0000000000121d90 XMM08=d3fa654d951b5efe000000000011a630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888018025210 RCX=0000000000000000 RDX=ffff888018041b40 RSI=ffffffff816e7516 RDI=ffff8880180251d8 RBP=dffffc0000000000 RSP=ffff88800f21f998 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888018025210 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff816e7533 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 00007f5c46019900 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=00007f5c45fe3008 CR3=000000000f206000 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