syzkaller login: [ 38.095084] BUG: Bad rss-counter state mm:00000000c6435ae6 type:MM_FILEPAGES val:33 [ 38.096558] BUG: Bad rss-counter state mm:00000000c6435ae6 type:MM_ANONPAGES val:22 [ 38.235292] ================================================================== [ 38.236221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.237152] Read of size 8 at addr ffff88800d5e0df0 by task sshd/220 [ 38.238068] [ 38.238308] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.239166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.240149] Call Trace: [ 38.240468] [ 38.240754] dump_stack_lvl+0x91/0xf0 [ 38.241273] print_report+0xcc/0x620 [ 38.241763] ? __virt_addr_valid+0x102/0x340 [ 38.242321] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.242944] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.243574] kasan_report+0xbe/0xf0 [ 38.244053] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.244676] vma_interval_tree_remove+0xc75/0xec0 [ 38.245280] vma_prepare+0xc54/0x11a0 [ 38.245757] __split_vma+0x5af/0x950 [ 38.246245] ? __pfx___split_vma+0x10/0x10 [ 38.246785] ? find_held_lock+0x2c/0x110 [ 38.247306] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.247881] ? lock_is_held_type+0x9f/0x120 [ 38.248430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.249048] ? mtree_range_walk+0x632/0x900 [ 38.249600] ? mas_walk+0x5c7/0x7c0 [ 38.250092] do_vmi_munmap+0x1f1/0x2b0 [ 38.250589] mmap_region+0x1f9/0x2660 [ 38.251076] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.251610] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.252333] ? __pfx_lock_acquire+0x10/0x10 [ 38.252875] ? __pfx_mmap_region+0x10/0x10 [ 38.253424] ? security_mmap_addr+0x7d/0xa0 [ 38.253966] ? get_unmapped_area+0x1f5/0x3f0 [ 38.254519] do_mmap+0x854/0xf00 [ 38.254958] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.255463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.256040] ksys_mmap_pgoff+0x3af/0x500 [ 38.256549] do_syscall_64+0x3f/0x90 [ 38.257029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.257676] RIP: 0033:0x7f02cd0f0d82 [ 38.258143] 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 [ 38.260317] RSP: 002b:00007ffe2035cfc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.261226] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02cd0f0d82 [ 38.262081] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02cc52a000 [ 38.262932] RBP: 00007f02cc52a000 R08: 0000000000000009 R09: 0000000000001000 [ 38.263784] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569a28f2b20 [ 38.264648] R13: 00007ffe2035cfe0 R14: 00007ffe2035d010 R15: 00007ffe2035d370 [ 38.265518] [ 38.265812] [ 38.266027] Allocated by task 213: [ 38.266461] kasan_save_stack+0x22/0x50 [ 38.266974] kasan_set_track+0x25/0x30 [ 38.267474] __kasan_slab_alloc+0x59/0x70 [ 38.268010] kmem_cache_alloc+0x16b/0x370 [ 38.268526] vm_area_dup+0x20/0x160 [ 38.268987] __split_vma+0x170/0x950 [ 38.269460] split_vma+0xc6/0x110 [ 38.269905] mprotect_fixup+0x8d2/0xb30 [ 38.270416] do_mprotect_pkey+0x87e/0xd40 [ 38.270942] __x64_sys_mprotect+0x78/0xc0 [ 38.271477] do_syscall_64+0x3f/0x90 [ 38.271980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.272637] [ 38.272854] Freed by task 213: [ 38.273249] kasan_save_stack+0x22/0x50 [ 38.273753] kasan_set_track+0x25/0x30 [ 38.274253] kasan_save_free_info+0x2b/0x50 [ 38.274812] __kasan_slab_free+0x10a/0x190 [ 38.275351] kmem_cache_free+0x10d/0x4d0 [ 38.275878] rcu_core+0x8c8/0x2860 [ 38.276324] __do_softirq+0x1b7/0x7d4 [ 38.276810] [ 38.277027] Last potentially related work creation: [ 38.277626] kasan_save_stack+0x22/0x50 [ 38.278140] __kasan_record_aux_stack+0x8e/0xa0 [ 38.278717] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.279366] remove_vma+0x139/0x170 [ 38.279935] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.280500] do_vmi_munmap+0x1f1/0x2b0 [ 38.280988] __vm_munmap+0x138/0x3a0 [ 38.281462] __x64_sys_munmap+0x59/0x80 [ 38.281967] do_syscall_64+0x3f/0x90 [ 38.282450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.283098] [ 38.283316] Second to last potentially related work creation: [ 38.284014] kasan_save_stack+0x22/0x50 [ 38.284524] __kasan_record_aux_stack+0x8e/0xa0 [ 38.285098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.285743] remove_vma+0x139/0x170 [ 38.286205] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.286764] do_vmi_munmap+0x1f1/0x2b0 [ 38.287263] mmap_region+0x1f9/0x2660 [ 38.287751] do_mmap+0x854/0xf00 [ 38.288193] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.288686] ksys_mmap_pgoff+0x3af/0x500 [ 38.289198] do_syscall_64+0x3f/0x90 [ 38.289671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.290313] [ 38.290529] The buggy address belongs to the object at ffff88800d5e0d98 [ 38.290529] which belongs to the cache vm_area_struct of size 168 [ 38.292094] The buggy address is located 88 bytes inside of [ 38.292094] freed 168-byte region [ffff88800d5e0d98, ffff88800d5e0e40) [ 38.293519] [ 38.293739] The buggy address belongs to the physical page: [ 38.294401] page:00000000d70e82b1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd5e0 [ 38.295483] memcg:ffff88800e2be601 [ 38.295922] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.296582] page_type: 0xffffffff() [ 38.297045] raw: 0100000000000200 ffff88800879fc80 ffffea0000389100 dead000000000002 [ 38.297967] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2be601 [ 38.298876] page dumped because: kasan: bad access detected [ 38.299559] [ 38.299775] Memory state around the buggy address: [ 38.300368] ffff88800d5e0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.301234] ffff88800d5e0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.302099] >ffff88800d5e0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.302965] ^ [ 38.303787] ffff88800d5e0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.304668] ffff88800d5e0e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.305525] ================================================================== [ 38.306513] Disabling lock debugging due to kernel taint [ 40.547074] BUG: Bad rss-counter state mm:00000000efe7f017 type:MM_FILEPAGES val:33 [ 40.548314] BUG: Bad rss-counter state mm:00000000efe7f017 type:MM_ANONPAGES val:22 [ 40.984085] BUG: Bad rss-counter state mm:0000000055df6549 type:MM_FILEPAGES val:33 [ 40.985058] BUG: Bad rss-counter state mm:0000000055df6549 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6815' (ECDSA) to the list of known hosts. 2023/06/20 03:59:47 fuzzer started 2023/06/20 03:59:47 dialing manager at localhost:44161 2023/06/20 03:59:47 checking machine... 2023/06/20 03:59:47 checking revisions... [ 41.705469] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:59:47 testing simple program... [ 41.760369] cgroup: Unknown subsys name 'net' [ 41.808570] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:39 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801656f480 RCX=0000000000000001 RDX=1ffff11002cadea8 RSI=ffffffff83638916 RDI=ffff88801656f48c RBP=ffff88801656f540 RSP=ffff88801656f398 R8 =0000000000000001 R9 =ffff88801656f3f8 R10=0000000000038001 R11=000000000008a842 R12=ffff88801656f480 R13=0000000000000000 R14=ffff88800e678000 R15=ffff888017e99600 RIP=ffffffff813ad4f7 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 00007fd83939f900 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=00007ffca8b0f000 CR3=00000000097aa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f4d8f2dbc40 CR3=000000000e1e8000 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=2037343a39353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a39353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000