syzkaller login: [ 30.087449] BUG: Bad rss-counter state mm:00000000fb6d0198 type:MM_FILEPAGES val:33 [ 30.088696] BUG: Bad rss-counter state mm:00000000fb6d0198 type:MM_ANONPAGES val:22 [ 30.231517] ================================================================== [ 30.232467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.233411] Read of size 8 at addr ffff88800de52968 by task sshd/222 [ 30.234185] [ 30.234403] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.235455] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.236464] Call Trace: [ 30.236782] [ 30.237071] dump_stack_lvl+0x91/0xf0 [ 30.237571] print_report+0xcc/0x620 [ 30.238059] ? __virt_addr_valid+0x102/0x340 [ 30.238611] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239257] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.239885] kasan_report+0xbe/0xf0 [ 30.240392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.241017] vma_interval_tree_remove+0xc75/0xec0 [ 30.241618] vma_prepare+0xc54/0x11a0 [ 30.242120] __split_vma+0x5af/0x950 [ 30.242599] ? __pfx___split_vma+0x10/0x10 [ 30.243150] ? find_held_lock+0x2c/0x110 [ 30.243689] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.244296] ? lock_is_held_type+0x9f/0x120 [ 30.244834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.245450] ? mtree_range_walk+0x632/0x900 [ 30.246003] ? mas_walk+0x5c7/0x7c0 [ 30.246483] do_vmi_munmap+0x1f1/0x2b0 [ 30.246991] mmap_region+0x1f9/0x2660 [ 30.247516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.248070] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.248783] ? __pfx_lock_acquire+0x10/0x10 [ 30.249314] ? __pfx_mmap_region+0x10/0x10 [ 30.249847] ? security_mmap_addr+0x7d/0xa0 [ 30.250381] ? get_unmapped_area+0x1f5/0x3f0 [ 30.250927] do_mmap+0x854/0xf00 [ 30.251401] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.251909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.252496] ksys_mmap_pgoff+0x3af/0x500 [ 30.253005] do_syscall_64+0x3f/0x90 [ 30.253487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.254133] RIP: 0033:0x7fe2b4843d82 [ 30.254611] 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 [ 30.256792] RSP: 002b:00007ffff32707d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.257693] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2b4843d82 [ 30.258539] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2b3c7d000 [ 30.259397] RBP: 00007fe2b3c7d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.260267] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558bbb433ec0 [ 30.261112] R13: 00007ffff32707f0 R14: 00007ffff3270820 R15: 00007ffff3270b80 [ 30.261962] [ 30.262256] [ 30.262475] Allocated by task 215: [ 30.262904] kasan_save_stack+0x22/0x50 [ 30.263442] kasan_set_track+0x25/0x30 [ 30.263965] __kasan_slab_alloc+0x59/0x70 [ 30.264500] kmem_cache_alloc+0x16b/0x370 [ 30.265013] vm_area_dup+0x20/0x160 [ 30.265469] __split_vma+0x170/0x950 [ 30.265932] split_vma+0xc6/0x110 [ 30.266378] mprotect_fixup+0x8d2/0xb30 [ 30.266876] do_mprotect_pkey+0x87e/0xd40 [ 30.267411] __x64_sys_mprotect+0x78/0xc0 [ 30.267970] do_syscall_64+0x3f/0x90 [ 30.268470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.269120] [ 30.269341] Freed by task 204: [ 30.269737] kasan_save_stack+0x22/0x50 [ 30.270245] kasan_set_track+0x25/0x30 [ 30.270739] kasan_save_free_info+0x2b/0x50 [ 30.271300] __kasan_slab_free+0x10a/0x190 [ 30.271834] kmem_cache_free+0x10d/0x4d0 [ 30.272387] rcu_core+0x8c8/0x2860 [ 30.272834] __do_softirq+0x1b7/0x7d4 [ 30.273315] [ 30.273530] Last potentially related work creation: [ 30.274113] kasan_save_stack+0x22/0x50 [ 30.274616] __kasan_record_aux_stack+0x8e/0xa0 [ 30.275201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275973] remove_vma+0x139/0x170 [ 30.276436] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.276996] do_vmi_munmap+0x1f1/0x2b0 [ 30.277483] __vm_munmap+0x138/0x3a0 [ 30.277947] __x64_sys_munmap+0x59/0x80 [ 30.278443] do_syscall_64+0x3f/0x90 [ 30.278918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.279589] [ 30.279808] The buggy address belongs to the object at ffff88800de52910 [ 30.279808] which belongs to the cache vm_area_struct of size 168 [ 30.281309] The buggy address is located 88 bytes inside of [ 30.281309] freed 168-byte region [ffff88800de52910, ffff88800de529b8) [ 30.282709] [ 30.282927] The buggy address belongs to the physical page: [ 30.283604] page:00000000c3d4137f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde52 [ 30.284722] memcg:ffff8880164c3e01 [ 30.285149] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.285799] page_type: 0xffffffff() [ 30.286252] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.287180] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164c3e01 [ 30.288116] page dumped because: kasan: bad access detected [ 30.288775] [ 30.288989] Memory state around the buggy address: [ 30.289573] ffff88800de52800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.290423] ffff88800de52880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.291330] >ffff88800de52900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292209] ^ [ 30.292999] ffff88800de52980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.293873] ffff88800de52a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.294749] ================================================================== [ 30.295795] Disabling lock debugging due to kernel taint [ 32.266794] BUG: Bad rss-counter state mm:000000004e63a34b type:MM_FILEPAGES val:33 [ 32.267987] BUG: Bad rss-counter state mm:000000004e63a34b type:MM_ANONPAGES val:22 [ 32.765205] BUG: Bad rss-counter state mm:0000000092ac0695 type:MM_FILEPAGES val:33 [ 32.766461] BUG: Bad rss-counter state mm:0000000092ac0695 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44355' (ECDSA) to the list of known hosts. 2023/06/21 00:30:36 fuzzer started 2023/06/21 00:30:37 dialing manager at localhost:36067 2023/06/21 00:30:37 checking machine... 2023/06/21 00:30:37 checking revisions... [ 33.511722] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:30:37 testing simple program... [ 33.559089] cgroup: Unknown subsys name 'net' [ 33.598421] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:36 Registers: info registers vcpu 0 RAX=00000000000b547f RBX=0000000000000001 RCX=ffffffff845137d6 RDX=00000000000b5484 RSI=0000000000035137 RDI=000000000021fd8c RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b3802 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130859 RFL=00000297 [--S-APC] 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 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=00007ffd095a0e78 CR3=000000000eb3c000 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=2036333a30333a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a30333a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015f651c0 RCX=0000000000000000 RDX=ffff888015f651c0 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=00007fdfba885c64 RSP=ffff88800d717190 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007fdfba885c64 R13=0000000000000000 R14=ffff888015f651c0 R15=0000000000092cc0 RIP=ffffffff8135bd59 RFL=00000293 [--S-A-C] 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 00007fdfb9fcc900 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=00007f8715a4d650 CR3=000000000cad4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e68b9eca9635bcb400000000000ae988 XMM05=121e306474d8ec5e0000000000132710 XMM06=00c3ffa147b8d8570000000000131500 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000