syzkaller login: [ 31.073464] BUG: Bad rss-counter state mm:00000000989ee3a2 type:MM_FILEPAGES val:33 [ 31.075091] BUG: Bad rss-counter state mm:00000000989ee3a2 type:MM_ANONPAGES val:22 [ 31.228693] ================================================================== [ 31.229769] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.230896] Read of size 8 at addr ffff888018580df0 by task sshd/220 [ 31.231833] [ 31.232107] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.233154] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.234354] Call Trace: [ 31.234741] [ 31.235091] dump_stack_lvl+0x91/0xf0 [ 31.235671] print_report+0xcc/0x620 [ 31.236288] ? __virt_addr_valid+0x102/0x340 [ 31.236964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.237710] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.238441] kasan_report+0xbe/0xf0 [ 31.239014] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.239756] vma_interval_tree_remove+0xc75/0xec0 [ 31.240441] vma_prepare+0xc54/0x11a0 [ 31.241001] __split_vma+0x5af/0x950 [ 31.241563] ? __pfx___split_vma+0x10/0x10 [ 31.242184] ? find_held_lock+0x2c/0x110 [ 31.242726] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.243317] ? lock_is_held_type+0x9f/0x120 [ 31.243871] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.244519] ? mtree_range_walk+0x632/0x900 [ 31.245089] ? mas_walk+0x5c7/0x7c0 [ 31.245640] do_vmi_munmap+0x1f1/0x2b0 [ 31.246193] mmap_region+0x1f9/0x2660 [ 31.246752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.247358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.248232] ? __pfx_lock_acquire+0x10/0x10 [ 31.248770] ? __pfx_mmap_region+0x10/0x10 [ 31.249308] ? security_mmap_addr+0x7d/0xa0 [ 31.249859] ? get_unmapped_area+0x1f5/0x3f0 [ 31.250457] do_mmap+0x854/0xf00 [ 31.250997] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.251503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.252088] ksys_mmap_pgoff+0x3af/0x500 [ 31.252609] do_syscall_64+0x3f/0x90 [ 31.253107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.253767] RIP: 0033:0x7f725f31ed82 [ 31.254235] 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 [ 31.256401] RSP: 002b:00007ffdcc1af4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.257339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f725f31ed82 [ 31.258211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f725e758000 [ 31.259066] RBP: 00007f725e758000 R08: 0000000000000009 R09: 0000000000001000 [ 31.259930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecb3f0aec0 [ 31.260811] R13: 00007ffdcc1af4d0 R14: 00007ffdcc1af500 R15: 00007ffdcc1af860 [ 31.261672] [ 31.261971] [ 31.262189] Allocated by task 213: [ 31.262644] kasan_save_stack+0x22/0x50 [ 31.263210] kasan_set_track+0x25/0x30 [ 31.263826] __kasan_slab_alloc+0x59/0x70 [ 31.264455] kmem_cache_alloc+0x16b/0x370 [ 31.265083] vm_area_dup+0x20/0x160 [ 31.265640] __split_vma+0x170/0x950 [ 31.266145] split_vma+0xc6/0x110 [ 31.266592] mprotect_fixup+0x8d2/0xb30 [ 31.267122] do_mprotect_pkey+0x87e/0xd40 [ 31.267674] __x64_sys_mprotect+0x78/0xc0 [ 31.268223] do_syscall_64+0x3f/0x90 [ 31.268785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.269484] [ 31.269716] Freed by task 213: [ 31.270127] kasan_save_stack+0x22/0x50 [ 31.270636] kasan_set_track+0x25/0x30 [ 31.271137] kasan_save_free_info+0x2b/0x50 [ 31.271679] __kasan_slab_free+0x10a/0x190 [ 31.272247] kmem_cache_free+0x10d/0x4d0 [ 31.272768] rcu_core+0x8c8/0x2860 [ 31.273226] __do_softirq+0x1b7/0x7d4 [ 31.273708] [ 31.273927] Last potentially related work creation: [ 31.274546] kasan_save_stack+0x22/0x50 [ 31.275065] __kasan_record_aux_stack+0x8e/0xa0 [ 31.275648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.276311] remove_vma+0x139/0x170 [ 31.276776] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.277333] do_vmi_munmap+0x1f1/0x2b0 [ 31.277833] __vm_munmap+0x138/0x3a0 [ 31.278311] __x64_sys_munmap+0x59/0x80 [ 31.278815] do_syscall_64+0x3f/0x90 [ 31.279290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.279937] [ 31.280160] The buggy address belongs to the object at ffff888018580d98 [ 31.280160] which belongs to the cache vm_area_struct of size 168 [ 31.281635] The buggy address is located 88 bytes inside of [ 31.281635] freed 168-byte region [ffff888018580d98, ffff888018580e40) [ 31.283047] [ 31.283265] The buggy address belongs to the physical page: [ 31.283930] page:000000001d73eb57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18580 [ 31.285079] memcg:ffff888016a1bd01 [ 31.285508] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.286217] page_type: 0xffffffff() [ 31.286670] raw: 0100000000000200 ffff88800879fc80 ffffea000057ee80 000000000000000d [ 31.287610] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a1bd01 [ 31.288549] page dumped because: kasan: bad access detected [ 31.289222] [ 31.289438] Memory state around the buggy address: [ 31.290029] ffff888018580c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.290891] ffff888018580d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.291755] >ffff888018580d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.292625] ^ [ 31.293461] ffff888018580e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.294328] ffff888018580e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.295174] ================================================================== [ 31.296612] Disabling lock debugging due to kernel taint [ 33.317894] BUG: Bad rss-counter state mm:000000000cc8b0cb type:MM_FILEPAGES val:33 [ 33.318960] BUG: Bad rss-counter state mm:000000000cc8b0cb type:MM_ANONPAGES val:22 [ 33.776004] BUG: Bad rss-counter state mm:00000000cd4f46d0 type:MM_FILEPAGES val:33 [ 33.777307] BUG: Bad rss-counter state mm:00000000cd4f46d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21740' (ECDSA) to the list of known hosts. 2023/06/20 04:48:32 fuzzer started 2023/06/20 04:48:32 dialing manager at localhost:44161 2023/06/20 04:48:32 checking machine... 2023/06/20 04:48:32 checking revisions... [ 34.379543] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:48:32 testing simple program... [ 34.435833] cgroup: Unknown subsys name 'net' [ 34.501488] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:48:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81895cd3 RCX=0000000000000001 RDX=1ffff11002ba1e4e RSI=ffff888015d0f848 RDI=ffffffff81895cd3 RBP=ffffffff81895cd3 RSP=ffff888015d0f1c0 R8 =0000000000000001 R9 =ffff888015d0f258 R10=0000000000038001 R11=0000000000024396 R12=ffff888015d0f2e0 R13=0000000000000000 R14=ffff8880164951c0 R15=0000000000092cc0 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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 00007f347330b900 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=00007f5a08b7e650 CR3=000000000d5e0000 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=cad5cec9514dc97400000000000ae988 XMM05=a20a3525d1532d930000000000134d90 XMM06=c291bd5c70af25b90000000000133b80 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007fffaf316358 CR3=0000000005482000 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=00007f70721265100000558c21181790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000