syzkaller login: [ 42.599438] BUG: Bad rss-counter state mm:00000000189c3cbd type:MM_FILEPAGES val:33 [ 42.600763] BUG: Bad rss-counter state mm:00000000189c3cbd type:MM_ANONPAGES val:22 [ 42.680821] ================================================================== [ 42.681747] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.682676] Read of size 8 at addr ffff88800e982ed8 by task sshd/219 [ 42.683451] [ 42.683671] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.684660] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.685663] Call Trace: [ 42.685988] [ 42.686276] dump_stack_lvl+0x91/0xf0 [ 42.686798] print_report+0xcc/0x620 [ 42.687285] ? __virt_addr_valid+0x102/0x340 [ 42.687847] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.688459] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.689080] kasan_report+0xbe/0xf0 [ 42.689569] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.690205] vma_interval_tree_remove+0xc75/0xec0 [ 42.690816] vma_prepare+0xc54/0x11a0 [ 42.691303] __split_vma+0x5af/0x950 [ 42.691779] ? __pfx___split_vma+0x10/0x10 [ 42.692311] ? find_held_lock+0x2c/0x110 [ 42.692828] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.693387] ? lock_is_held_type+0x9f/0x120 [ 42.693952] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.694560] ? mtree_range_walk+0x632/0x900 [ 42.695109] ? mas_walk+0x5c7/0x7c0 [ 42.695586] do_vmi_munmap+0x1f1/0x2b0 [ 42.696078] mmap_region+0x1f9/0x2660 [ 42.696554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.697073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.697790] ? __pfx_lock_acquire+0x10/0x10 [ 42.698322] ? __pfx_mmap_region+0x10/0x10 [ 42.698864] ? security_mmap_addr+0x7d/0xa0 [ 42.699396] ? get_unmapped_area+0x1f5/0x3f0 [ 42.699948] do_mmap+0x854/0xf00 [ 42.700389] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.700879] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.701454] ksys_mmap_pgoff+0x3af/0x500 [ 42.701982] do_syscall_64+0x3f/0x90 [ 42.702458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.703104] RIP: 0033:0x7f952a8ebd82 [ 42.703561] 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 [ 42.705703] RSP: 002b:00007ffd97d10898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.706609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f952a8ebd82 [ 42.707459] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9529d25000 [ 42.708310] RBP: 00007f9529d25000 R08: 0000000000000009 R09: 0000000000001000 [ 42.709155] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580ef0d5f70 [ 42.710008] R13: 00007ffd97d108b0 R14: 00007ffd97d108e0 R15: 00007ffd97d10c40 [ 42.710871] [ 42.711164] [ 42.711379] Allocated by task 212: [ 42.711813] kasan_save_stack+0x22/0x50 [ 42.712317] kasan_set_track+0x25/0x30 [ 42.712813] __kasan_slab_alloc+0x59/0x70 [ 42.713341] kmem_cache_alloc+0x16b/0x370 [ 42.713875] vm_area_dup+0x20/0x160 [ 42.714333] __split_vma+0x170/0x950 [ 42.714802] split_vma+0xc6/0x110 [ 42.715241] mprotect_fixup+0x8d2/0xb30 [ 42.715744] do_mprotect_pkey+0x87e/0xd40 [ 42.716264] __x64_sys_mprotect+0x78/0xc0 [ 42.716789] do_syscall_64+0x3f/0x90 [ 42.717265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.717917] [ 42.718132] Freed by task 19: [ 42.718517] kasan_save_stack+0x22/0x50 [ 42.719022] kasan_set_track+0x25/0x30 [ 42.719516] kasan_save_free_info+0x2b/0x50 [ 42.720043] __kasan_slab_free+0x10a/0x190 [ 42.720580] kmem_cache_free+0x10d/0x4d0 [ 42.721092] rcu_core+0x8c8/0x2860 [ 42.721555] __do_softirq+0x1b7/0x7d4 [ 42.722033] [ 42.722250] Last potentially related work creation: [ 42.722831] kasan_save_stack+0x22/0x50 [ 42.723334] __kasan_record_aux_stack+0x8e/0xa0 [ 42.723916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.724554] remove_vma+0x139/0x170 [ 42.725010] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.725645] do_vmi_munmap+0x1f1/0x2b0 [ 42.726128] __vm_munmap+0x138/0x3a0 [ 42.726594] __x64_sys_munmap+0x59/0x80 [ 42.727091] do_syscall_64+0x3f/0x90 [ 42.727560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.728197] [ 42.728412] Second to last potentially related work creation: [ 42.729097] kasan_save_stack+0x22/0x50 [ 42.729603] __kasan_record_aux_stack+0x8e/0xa0 [ 42.730179] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.730824] remove_vma+0x139/0x170 [ 42.731279] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.731845] do_vmi_munmap+0x1f1/0x2b0 [ 42.732334] mmap_region+0x1f9/0x2660 [ 42.732808] do_mmap+0x854/0xf00 [ 42.733236] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.733738] ksys_mmap_pgoff+0x3af/0x500 [ 42.734238] do_syscall_64+0x3f/0x90 [ 42.734709] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.735351] [ 42.735569] The buggy address belongs to the object at ffff88800e982e80 [ 42.735569] which belongs to the cache vm_area_struct of size 168 [ 42.737041] The buggy address is located 88 bytes inside of [ 42.737041] freed 168-byte region [ffff88800e982e80, ffff88800e982f28) [ 42.738458] [ 42.738672] The buggy address belongs to the physical page: [ 42.739337] page:00000000ec6b307d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe982 [ 42.740423] memcg:ffff88800d9ecc01 [ 42.740856] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.741513] page_type: 0xffffffff() [ 42.741967] raw: 0100000000000200 ffff88800879fc80 ffffea00003a1980 dead000000000006 [ 42.742881] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d9ecc01 [ 42.743788] page dumped because: kasan: bad access detected [ 42.744449] [ 42.744663] Memory state around the buggy address: [ 42.745246] ffff88800e982d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.746106] ffff88800e982e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.746956] >ffff88800e982e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.747813] ^ [ 42.748544] ffff88800e982f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.749403] ffff88800e982f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.750262] ================================================================== [ 42.751190] Disabling lock debugging due to kernel taint [ 44.636822] BUG: Bad rss-counter state mm:00000000352e5d72 type:MM_FILEPAGES val:33 [ 44.638048] BUG: Bad rss-counter state mm:00000000352e5d72 type:MM_ANONPAGES val:22 [ 45.090312] BUG: Bad rss-counter state mm:00000000f6c982a2 type:MM_FILEPAGES val:33 [ 45.091318] BUG: Bad rss-counter state mm:00000000f6c982a2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3032' (ECDSA) to the list of known hosts. 2023/06/19 20:42:54 fuzzer started 2023/06/19 20:42:54 dialing manager at localhost:44161 2023/06/19 20:42:54 checking machine... 2023/06/19 20:42:54 checking revisions... [ 45.819962] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:42:54 testing simple program... [ 45.870219] cgroup: Unknown subsys name 'net' [ 45.923557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:42:50 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff37881a960 CR3=000000000d99c000 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=2033353a32343a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000000000000000d RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff87f94640 RSP=ffff888018f37b78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888018f37d28 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff838cec0d 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 00007f6596810900 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=00007ffeb8bf4000 CR3=000000000d66e000 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