syzkaller login: [ 31.308983] BUG: Bad rss-counter state mm:000000008c327148 type:MM_FILEPAGES val:33 [ 31.310172] BUG: Bad rss-counter state mm:000000008c327148 type:MM_ANONPAGES val:22 [ 31.349963] ================================================================== [ 31.350880] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.352044] Read of size 8 at addr ffff88800de7ded8 by task sshd/220 [ 31.353040] [ 31.353272] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.354272] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.355343] Call Trace: [ 31.355662] [ 31.355959] dump_stack_lvl+0x91/0xf0 [ 31.356535] print_report+0xcc/0x620 [ 31.357084] ? __virt_addr_valid+0x102/0x340 [ 31.357765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358390] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359007] kasan_report+0xbe/0xf0 [ 31.359485] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360151] vma_interval_tree_remove+0xc75/0xec0 [ 31.360764] vma_prepare+0xc54/0x11a0 [ 31.361252] __split_vma+0x5af/0x950 [ 31.361729] ? __pfx___split_vma+0x10/0x10 [ 31.362272] ? find_held_lock+0x2c/0x110 [ 31.362801] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.363424] ? lock_is_held_type+0x9f/0x120 [ 31.364015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.364638] ? mtree_range_walk+0x632/0x900 [ 31.365217] ? mas_walk+0x5c7/0x7c0 [ 31.365700] do_vmi_munmap+0x1f1/0x2b0 [ 31.366227] mmap_region+0x1f9/0x2660 [ 31.366726] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.367323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.368102] ? __pfx_lock_acquire+0x10/0x10 [ 31.368649] ? __pfx_mmap_region+0x10/0x10 [ 31.369211] ? security_mmap_addr+0x7d/0xa0 [ 31.369756] ? get_unmapped_area+0x1f5/0x3f0 [ 31.370331] do_mmap+0x854/0xf00 [ 31.370791] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.371347] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.371934] ksys_mmap_pgoff+0x3af/0x500 [ 31.372450] do_syscall_64+0x3f/0x90 [ 31.372933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373589] RIP: 0033:0x7fa6abfb0d82 [ 31.374055] 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 [ 31.376206] RSP: 002b:00007ffc1cfa2df8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.377129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6abfb0d82 [ 31.377987] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6ab3ea000 [ 31.378849] RBP: 00007fa6ab3ea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.379733] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d0998bb20 [ 31.380594] R13: 00007ffc1cfa2e10 R14: 00007ffc1cfa2e40 R15: 00007ffc1cfa31a0 [ 31.381462] [ 31.381760] [ 31.381983] Allocated by task 213: [ 31.382422] kasan_save_stack+0x22/0x50 [ 31.382939] kasan_set_track+0x25/0x30 [ 31.383436] __kasan_slab_alloc+0x59/0x70 [ 31.383976] kmem_cache_alloc+0x16b/0x370 [ 31.384510] vm_area_dup+0x20/0x160 [ 31.384974] __split_vma+0x170/0x950 [ 31.385445] split_vma+0xc6/0x110 [ 31.385896] mprotect_fixup+0x8d2/0xb30 [ 31.386410] do_mprotect_pkey+0x87e/0xd40 [ 31.386944] __x64_sys_mprotect+0x78/0xc0 [ 31.387473] do_syscall_64+0x3f/0x90 [ 31.387959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388618] [ 31.388834] Freed by task 213: [ 31.389231] kasan_save_stack+0x22/0x50 [ 31.389748] kasan_set_track+0x25/0x30 [ 31.390260] kasan_save_free_info+0x2b/0x50 [ 31.390808] __kasan_slab_free+0x10a/0x190 [ 31.391358] kmem_cache_free+0x10d/0x4d0 [ 31.391890] rcu_core+0x8c8/0x2860 [ 31.392343] __do_softirq+0x1b7/0x7d4 [ 31.392833] [ 31.393052] Last potentially related work creation: [ 31.393645] kasan_save_stack+0x22/0x50 [ 31.394151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.394810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.395455] remove_vma+0x139/0x170 [ 31.395933] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.396496] do_vmi_munmap+0x1f1/0x2b0 [ 31.396990] __vm_munmap+0x138/0x3a0 [ 31.397467] __x64_sys_munmap+0x59/0x80 [ 31.397971] do_syscall_64+0x3f/0x90 [ 31.398447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399093] [ 31.399309] The buggy address belongs to the object at ffff88800de7de80 [ 31.399309] which belongs to the cache vm_area_struct of size 168 [ 31.400812] The buggy address is located 88 bytes inside of [ 31.400812] freed 168-byte region [ffff88800de7de80, ffff88800de7df28) [ 31.402235] [ 31.402460] The buggy address belongs to the physical page: [ 31.403124] page:00000000b893c54a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde7d [ 31.404225] memcg:ffff888008c77001 [ 31.404659] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.405323] page_type: 0xffffffff() [ 31.405781] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.406712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008c77001 [ 31.407627] page dumped because: kasan: bad access detected [ 31.408314] [ 31.408534] Memory state around the buggy address: [ 31.409122] ffff88800de7dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409990] ffff88800de7de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.410861] >ffff88800de7de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411735] ^ [ 31.412473] ffff88800de7df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.413349] ffff88800de7df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.414211] ================================================================== [ 31.415218] Disabling lock debugging due to kernel taint [ 33.690247] BUG: Bad rss-counter state mm:00000000dc15ac6a type:MM_FILEPAGES val:33 [ 33.691447] BUG: Bad rss-counter state mm:00000000dc15ac6a type:MM_ANONPAGES val:22 [ 34.111322] BUG: Bad rss-counter state mm:00000000b1ea553c type:MM_FILEPAGES val:33 [ 34.112598] BUG: Bad rss-counter state mm:00000000b1ea553c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44133' (ECDSA) to the list of known hosts. 2023/06/20 17:33:25 fuzzer started 2023/06/20 17:33:26 dialing manager at localhost:36067 2023/06/20 17:33:26 checking machine... 2023/06/20 17:33:26 checking revisions... [ 34.837889] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:33:26 testing simple program... [ 34.883505] cgroup: Unknown subsys name 'net' [ 34.920586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:33:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002b8bee8 RSI=ffffffff8450cc7f RDI=ffff888015c5f5a8 RBP=ffff888015c5f640 RSP=ffff888015c5f5a8 R8 =0000000000000001 R9 =ffff888015c5f5e8 R10=0000000000038001 R11=000000000008abe0 R12=ffff888015c5f670 R13=0000000000000000 R14=ffff88800e63d1c0 R15=ffff888016f4f980 RIP=ffffffff810bd052 RFL=00000202 [-------] 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 00007f4a6f0c3900 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=00007f4a6e54c7d0 CR3=000000000cb48000 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=c63d3efa232670ba4f45dbdca02852f1 XMM02=000000000011ba28eff9b2d0a8fce9cb XMM03=000000000011baf82c67c8bc2e329bc3 XMM04=098bd6f8926c9c1000000000000ae988 XMM05=8bcbaf813a68f0e30000000000133bc0 XMM06=4fda316b135da52b00000000001329b0 XMM07=fb795ef6d65770560000000000122c48 XMM08=2c67c8bc2e329bc3000000000011ba98 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=0000000000000001 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11003032f76 RSP=ffff888018197b80 R8 =0000000000000000 R9 =0000000000000246 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff856d84b8 R13=ffffffff8180b006 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180f079 RFL=00000012 [----A--] 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 00007fe53af51900 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=00007ffea0a13fe8 CR3=00000000181a8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000