syzkaller login: [ 33.194802] BUG: Bad rss-counter state mm:00000000d6520c90 type:MM_FILEPAGES val:33 [ 33.196034] BUG: Bad rss-counter state mm:00000000d6520c90 type:MM_ANONPAGES val:22 [ 33.368956] ================================================================== [ 33.369902] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.370865] Read of size 8 at addr ffff88800947fa50 by task sshd/220 [ 33.371661] [ 33.371891] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.372908] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.373904] Call Trace: [ 33.374239] [ 33.374536] dump_stack_lvl+0x91/0xf0 [ 33.375044] print_report+0xcc/0x620 [ 33.375531] ? __virt_addr_valid+0x102/0x340 [ 33.376091] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.376713] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.377331] kasan_report+0xbe/0xf0 [ 33.377818] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.378442] vma_interval_tree_remove+0xc75/0xec0 [ 33.379055] vma_prepare+0xc54/0x11a0 [ 33.379536] __split_vma+0x5af/0x950 [ 33.380018] ? __pfx___split_vma+0x10/0x10 [ 33.380562] ? find_held_lock+0x2c/0x110 [ 33.381090] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.381713] ? lock_is_held_type+0x9f/0x120 [ 33.382267] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.382888] ? mtree_range_walk+0x632/0x900 [ 33.383459] ? mas_walk+0x5c7/0x7c0 [ 33.383949] do_vmi_munmap+0x1f1/0x2b0 [ 33.384454] mmap_region+0x1f9/0x2660 [ 33.384935] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.385471] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.386196] ? __pfx_lock_acquire+0x10/0x10 [ 33.386744] ? __pfx_mmap_region+0x10/0x10 [ 33.387298] ? security_mmap_addr+0x7d/0xa0 [ 33.387840] ? get_unmapped_area+0x1f5/0x3f0 [ 33.388395] do_mmap+0x854/0xf00 [ 33.388830] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.389323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.389899] ksys_mmap_pgoff+0x3af/0x500 [ 33.390413] do_syscall_64+0x3f/0x90 [ 33.390898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.391555] RIP: 0033:0x7f0abf5ded82 [ 33.392010] 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 [ 33.394133] RSP: 002b:00007ffd979fb6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.395027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0abf5ded82 [ 33.395890] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0abea18000 [ 33.396742] RBP: 00007f0abea18000 R08: 0000000000000009 R09: 0000000000001000 [ 33.397580] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fe0083f60 [ 33.398442] R13: 00007ffd979fb710 R14: 00007ffd979fb740 R15: 00007ffd979fbaa0 [ 33.399297] [ 33.399587] [ 33.399800] Allocated by task 213: [ 33.400337] kasan_save_stack+0x22/0x50 [ 33.401024] kasan_set_track+0x25/0x30 [ 33.401698] __kasan_slab_alloc+0x59/0x70 [ 33.402412] kmem_cache_alloc+0x16b/0x370 [ 33.403111] vm_area_dup+0x20/0x160 [ 33.403727] __split_vma+0x170/0x950 [ 33.404232] split_vma+0xc6/0x110 [ 33.404678] mprotect_fixup+0x8d2/0xb30 [ 33.405204] do_mprotect_pkey+0x87e/0xd40 [ 33.405772] __x64_sys_mprotect+0x78/0xc0 [ 33.406290] do_syscall_64+0x3f/0x90 [ 33.406781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.407421] [ 33.407635] Freed by task 213: [ 33.408057] kasan_save_stack+0x22/0x50 [ 33.408562] kasan_set_track+0x25/0x30 [ 33.409203] kasan_save_free_info+0x2b/0x50 [ 33.409761] __kasan_slab_free+0x10a/0x190 [ 33.410300] kmem_cache_free+0x10d/0x4d0 [ 33.410813] rcu_core+0x8c8/0x2860 [ 33.411258] __do_softirq+0x1b7/0x7d4 [ 33.411727] [ 33.411941] Last potentially related work creation: [ 33.412517] kasan_save_stack+0x22/0x50 [ 33.413016] __kasan_record_aux_stack+0x8e/0xa0 [ 33.413623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.414285] remove_vma+0x139/0x170 [ 33.414736] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.415290] do_vmi_munmap+0x1f1/0x2b0 [ 33.415783] __vm_munmap+0x138/0x3a0 [ 33.416248] __x64_sys_munmap+0x59/0x80 [ 33.416741] do_syscall_64+0x3f/0x90 [ 33.417219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.417870] [ 33.418084] The buggy address belongs to the object at ffff88800947f9f8 [ 33.418084] which belongs to the cache vm_area_struct of size 168 [ 33.419546] The buggy address is located 88 bytes inside of [ 33.419546] freed 168-byte region [ffff88800947f9f8, ffff88800947faa0) [ 33.420943] [ 33.421158] The buggy address belongs to the physical page: [ 33.421876] page:000000006707a905 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x947f [ 33.422992] memcg:ffff88800d286001 [ 33.423426] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.424095] page_type: 0xffffffff() [ 33.424556] raw: 0100000000000200 ffff88800879fc80 ffffea0000312b00 dead000000000008 [ 33.425505] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d286001 [ 33.426457] page dumped because: kasan: bad access detected [ 33.427163] [ 33.427381] Memory state around the buggy address: [ 33.428045] ffff88800947f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.428939] ffff88800947f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.429843] >ffff88800947fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.430729] ^ [ 33.431450] ffff88800947fa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 33.432363] ffff88800947fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.433251] ================================================================== [ 33.434251] Disabling lock debugging due to kernel taint [ 35.391265] BUG: Bad rss-counter state mm:00000000de29d645 type:MM_FILEPAGES val:33 [ 35.392539] BUG: Bad rss-counter state mm:00000000de29d645 type:MM_ANONPAGES val:22 [ 35.945955] BUG: Bad rss-counter state mm:000000008aac5ffb type:MM_FILEPAGES val:33 [ 35.947149] BUG: Bad rss-counter state mm:000000008aac5ffb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47775' (ECDSA) to the list of known hosts. 2023/06/19 10:56:43 fuzzer started 2023/06/19 10:56:43 dialing manager at localhost:44161 2023/06/19 10:56:43 checking machine... 2023/06/19 10:56:43 checking revisions... [ 36.688666] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:56:43 testing simple program... [ 36.743402] cgroup: Unknown subsys name 'net' [ 36.784140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:41 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002cabf53 RSI=ffffffff8363dd1c RDI=ffff88801655fb08 RBP=ffff88801655fad8 RSP=ffff88801655fa38 R8 =0000000000000001 R9 =ffff88801655fa80 R10=0000000000038001 R11=000000000008a6be R12=ffff88801655fb08 R13=0000000000000000 R14=ffff88800ea28000 R15=ffff88801b141390 RIP=ffffffff813ad42e RFL=00000282 [--S----] 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 00007fe8bfbb5900 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=00007fff57f1d000 CR3=000000000e9c6000 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=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 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=00007f0e97a28340 CR3=00000000101ea000 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=00000000000000000000000000000000 XMM01=a341a0b1104ae7855147f6235d05f3ad XMM02=2c67c8bc2e329bc3000000000011bc98 XMM03=fb795ef6d65770560000000000123d48 XMM04=73baf239f7f5992900000000000ae988 XMM05=e4cb8bb95a7664b600000000001338e8 XMM06=ba92335492309ef20000000000132750 XMM07=e042d86d42eb936e0000000000123fc8 XMM08=c313635795312d77000000000011bcf8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000