syzkaller login: [ 43.063301] BUG: Bad rss-counter state mm:00000000a73c84c9 type:MM_FILEPAGES val:33 [ 43.064310] BUG: Bad rss-counter state mm:00000000a73c84c9 type:MM_ANONPAGES val:22 [ 43.226575] ================================================================== [ 43.227672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.228774] Read of size 8 at addr ffff88800e1bf798 by task sshd/219 [ 43.229955] [ 43.230212] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.231227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.232458] Call Trace: [ 43.232795] [ 43.233091] dump_stack_lvl+0x91/0xf0 [ 43.233586] print_report+0xcc/0x620 [ 43.234069] ? __virt_addr_valid+0x102/0x340 [ 43.234633] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.235257] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.235873] kasan_report+0xbe/0xf0 [ 43.236344] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.236989] vma_interval_tree_remove+0xc75/0xec0 [ 43.237615] vma_prepare+0xc54/0x11a0 [ 43.238097] __split_vma+0x5af/0x950 [ 43.238570] ? __pfx___split_vma+0x10/0x10 [ 43.239092] ? find_held_lock+0x2c/0x110 [ 43.239611] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.240173] ? lock_is_held_type+0x9f/0x120 [ 43.240707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.241326] ? mtree_range_walk+0x632/0x900 [ 43.241875] ? mas_walk+0x5c7/0x7c0 [ 43.242355] do_vmi_munmap+0x1f1/0x2b0 [ 43.242872] mmap_region+0x1f9/0x2660 [ 43.243369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.243900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.244646] ? __pfx_lock_acquire+0x10/0x10 [ 43.245215] ? __pfx_mmap_region+0x10/0x10 [ 43.245768] ? security_mmap_addr+0x7d/0xa0 [ 43.246295] ? get_unmapped_area+0x1f5/0x3f0 [ 43.246852] do_mmap+0x854/0xf00 [ 43.247286] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.247783] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.248339] ksys_mmap_pgoff+0x3af/0x500 [ 43.248846] do_syscall_64+0x3f/0x90 [ 43.249342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.249994] RIP: 0033:0x7fd32429ad82 [ 43.250450] 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 [ 43.252647] RSP: 002b:00007ffc20da1658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.253611] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd32429ad82 [ 43.254490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3236d4000 [ 43.255375] RBP: 00007fd3236d4000 R08: 0000000000000009 R09: 0000000000001000 [ 43.256234] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a7600dd90 [ 43.257101] R13: 00007ffc20da1670 R14: 00007ffc20da16a0 R15: 00007ffc20da1a00 [ 43.257996] [ 43.258304] [ 43.258529] Allocated by task 212: [ 43.258983] kasan_save_stack+0x22/0x50 [ 43.259507] kasan_set_track+0x25/0x30 [ 43.260023] __kasan_slab_alloc+0x59/0x70 [ 43.260561] kmem_cache_alloc+0x16b/0x370 [ 43.261122] vm_area_dup+0x20/0x160 [ 43.261584] __split_vma+0x170/0x950 [ 43.262050] split_vma+0xc6/0x110 [ 43.262486] mprotect_fixup+0x8d2/0xb30 [ 43.262985] do_mprotect_pkey+0x87e/0xd40 [ 43.263508] __x64_sys_mprotect+0x78/0xc0 [ 43.264032] do_syscall_64+0x3f/0x90 [ 43.264509] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.265157] [ 43.265373] Freed by task 212: [ 43.265771] kasan_save_stack+0x22/0x50 [ 43.266273] kasan_set_track+0x25/0x30 [ 43.266770] kasan_save_free_info+0x2b/0x50 [ 43.267318] __kasan_slab_free+0x10a/0x190 [ 43.267870] kmem_cache_free+0x10d/0x4d0 [ 43.268398] rcu_core+0x8c8/0x2860 [ 43.268886] __do_softirq+0x1b7/0x7d4 [ 43.269390] [ 43.269612] Last potentially related work creation: [ 43.270226] kasan_save_stack+0x22/0x50 [ 43.270855] __kasan_record_aux_stack+0x8e/0xa0 [ 43.271451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.272128] remove_vma+0x139/0x170 [ 43.272590] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.273181] do_vmi_munmap+0x1f1/0x2b0 [ 43.273682] __vm_munmap+0x138/0x3a0 [ 43.274157] __x64_sys_munmap+0x59/0x80 [ 43.274664] do_syscall_64+0x3f/0x90 [ 43.275132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.275791] [ 43.276022] Second to last potentially related work creation: [ 43.276719] kasan_save_stack+0x22/0x50 [ 43.277243] __kasan_record_aux_stack+0x8e/0xa0 [ 43.277829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.278498] remove_vma+0x139/0x170 [ 43.278956] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.279512] do_vmi_munmap+0x1f1/0x2b0 [ 43.279998] mmap_region+0x1f9/0x2660 [ 43.280474] do_mmap+0x854/0xf00 [ 43.280916] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.281414] ksys_mmap_pgoff+0x3af/0x500 [ 43.281930] do_syscall_64+0x3f/0x90 [ 43.282405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.283045] [ 43.283262] The buggy address belongs to the object at ffff88800e1bf740 [ 43.283262] which belongs to the cache vm_area_struct of size 168 [ 43.284730] The buggy address is located 88 bytes inside of [ 43.284730] freed 168-byte region [ffff88800e1bf740, ffff88800e1bf7e8) [ 43.286139] [ 43.286356] The buggy address belongs to the physical page: [ 43.287022] page:0000000086b524e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1bf [ 43.288118] memcg:ffff88800dd77e01 [ 43.288548] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 43.289274] page_type: 0xffffffff() [ 43.289729] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 43.290651] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd77e01 [ 43.291549] page dumped because: kasan: bad access detected [ 43.292206] [ 43.292423] Memory state around the buggy address: [ 43.293008] ffff88800e1bf680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.293857] ffff88800e1bf700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 43.294700] >ffff88800e1bf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 43.295545] ^ [ 43.296037] ffff88800e1bf800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 43.296891] ffff88800e1bf880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 43.297738] ================================================================== [ 43.298758] Disabling lock debugging due to kernel taint [ 45.708387] BUG: Bad rss-counter state mm:00000000471afb23 type:MM_FILEPAGES val:33 [ 45.709901] BUG: Bad rss-counter state mm:00000000471afb23 type:MM_ANONPAGES val:22 [ 46.293331] BUG: Bad rss-counter state mm:0000000041f992c7 type:MM_FILEPAGES val:33 [ 46.294489] BUG: Bad rss-counter state mm:0000000041f992c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49152' (ECDSA) to the list of known hosts. 2023/06/19 21:47:35 fuzzer started 2023/06/19 21:47:35 dialing manager at localhost:44161 2023/06/19 21:47:35 checking machine... 2023/06/19 21:47:35 checking revisions... [ 46.905847] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:47:35 testing simple program... [ 46.960670] cgroup: Unknown subsys name 'net' [ 46.994639] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:47:30 Registers: info registers vcpu 0 RAX=00000000000000ba RBX=0000560db06d8360 RCX=00007f6ac26ead47 RDX=00000000ffffffff RSI=ffffffffffffffff RDI=0000560db06d8360 RBP=0000000000000057 RSP=00007fff18b25968 R8 =000000006490ccf7 R9 =00007fff18ba5080 R10=00007fff18ba5080 R11=0000000000000202 R12=0000000000000057 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84600010 RFL=00000002 [-------] 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 00007f6ac1e21900 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=00007f6ac125ef30 CR3=000000000d760000 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=000000000010c5582fccd54c36d8a3f3 XMM01=69848282e32d1e8da04272373aa99051 XMM02=000000000011cf40eff9b2d0a8fce9cb XMM03=000000000011d0102c67c8bc2e329bc3 XMM04=9e2eed3ffc38d37d00000000000ae988 XMM05=5eaae9c8d60a93840000000000135df0 XMM06=4fda316b135da52b0000000000134e90 XMM07=e042d86d42eb936e0000000000123bd0 XMM08=7654115a2c868136000000000011d010 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888019fddc60 RCX=ffffffff81370c61 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff88800f3cf8f0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81370c69 RFL=00000047 [---Z-PC] 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 00007f21c7291900 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=00007ffdf6a8e000 CR3=000000000ee7a000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000