syzkaller login: [ 30.190100] BUG: Bad rss-counter state mm:000000009de3495c type:MM_FILEPAGES val:33 [ 30.191377] BUG: Bad rss-counter state mm:000000009de3495c type:MM_ANONPAGES val:22 [ 30.315408] ================================================================== [ 30.316355] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.317294] Read of size 8 at addr ffff88801a054798 by task sshd/221 [ 30.318060] [ 30.318425] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.319313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.320337] Call Trace: [ 30.320661] [ 30.320948] dump_stack_lvl+0x91/0xf0 [ 30.321445] print_report+0xcc/0x620 [ 30.321929] ? __virt_addr_valid+0x102/0x340 [ 30.322491] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323118] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.323737] kasan_report+0xbe/0xf0 [ 30.324214] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.324835] vma_interval_tree_remove+0xc75/0xec0 [ 30.325440] vma_prepare+0xc54/0x11a0 [ 30.325916] __split_vma+0x5af/0x950 [ 30.326390] ? __pfx___split_vma+0x10/0x10 [ 30.326911] ? find_held_lock+0x2c/0x110 [ 30.327429] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.327993] ? lock_is_held_type+0x9f/0x120 [ 30.328567] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.329172] ? mtree_range_walk+0x632/0x900 [ 30.329726] ? mas_walk+0x5c7/0x7c0 [ 30.330197] do_vmi_munmap+0x1f1/0x2b0 [ 30.330688] mmap_region+0x1f9/0x2660 [ 30.331167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.331669] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.332392] ? __pfx_lock_acquire+0x10/0x10 [ 30.332933] ? __pfx_mmap_region+0x10/0x10 [ 30.333461] ? security_mmap_addr+0x7d/0xa0 [ 30.333993] ? get_unmapped_area+0x1f5/0x3f0 [ 30.334551] do_mmap+0x854/0xf00 [ 30.334988] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.335481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.336049] ksys_mmap_pgoff+0x3af/0x500 [ 30.336562] do_syscall_64+0x3f/0x90 [ 30.337039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.337683] RIP: 0033:0x7f7a1d70cd82 [ 30.338139] 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 [ 30.340259] RSP: 002b:00007ffd2f17da48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.341166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a1d70cd82 [ 30.342007] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a1cb46000 [ 30.342838] RBP: 00007f7a1cb46000 R08: 0000000000000009 R09: 0000000000001000 [ 30.343699] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a35f25ec0 [ 30.344550] R13: 00007ffd2f17da60 R14: 00007ffd2f17da90 R15: 00007ffd2f17ddf0 [ 30.345406] [ 30.345695] [ 30.345906] Allocated by task 214: [ 30.346332] kasan_save_stack+0x22/0x50 [ 30.346838] kasan_set_track+0x25/0x30 [ 30.347329] __kasan_slab_alloc+0x59/0x70 [ 30.347846] kmem_cache_alloc+0x16b/0x370 [ 30.348381] vm_area_dup+0x20/0x160 [ 30.348838] __split_vma+0x170/0x950 [ 30.349305] split_vma+0xc6/0x110 [ 30.349746] mprotect_fixup+0x8d2/0xb30 [ 30.350242] do_mprotect_pkey+0x87e/0xd40 [ 30.350762] __x64_sys_mprotect+0x78/0xc0 [ 30.351276] do_syscall_64+0x3f/0x90 [ 30.351756] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.352402] [ 30.352619] Freed by task 214: [ 30.353010] kasan_save_stack+0x22/0x50 [ 30.353511] kasan_set_track+0x25/0x30 [ 30.354002] kasan_save_free_info+0x2b/0x50 [ 30.354533] __kasan_slab_free+0x10a/0x190 [ 30.355067] kmem_cache_free+0x10d/0x4d0 [ 30.355572] rcu_core+0x8c8/0x2860 [ 30.356014] __do_softirq+0x1b7/0x7d4 [ 30.356513] [ 30.356729] Last potentially related work creation: [ 30.357306] kasan_save_stack+0x22/0x50 [ 30.357809] __kasan_record_aux_stack+0x8e/0xa0 [ 30.358379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.359018] remove_vma+0x139/0x170 [ 30.359471] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.360023] do_vmi_munmap+0x1f1/0x2b0 [ 30.360605] __vm_munmap+0x138/0x3a0 [ 30.361069] __x64_sys_munmap+0x59/0x80 [ 30.361564] do_syscall_64+0x3f/0x90 [ 30.362036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.362718] [ 30.362983] Second to last potentially related work creation: [ 30.363827] kasan_save_stack+0x22/0x50 [ 30.364459] __kasan_record_aux_stack+0x8e/0xa0 [ 30.365170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.365962] remove_vma+0x139/0x170 [ 30.366515] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.367197] do_vmi_munmap+0x1f1/0x2b0 [ 30.367797] mmap_region+0x1f9/0x2660 [ 30.368396] do_mmap+0x854/0xf00 [ 30.368928] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.369526] ksys_mmap_pgoff+0x3af/0x500 [ 30.370138] do_syscall_64+0x3f/0x90 [ 30.370723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.371508] [ 30.371768] The buggy address belongs to the object at ffff88801a054740 [ 30.371768] which belongs to the cache vm_area_struct of size 168 [ 30.373570] The buggy address is located 88 bytes inside of [ 30.373570] freed 168-byte region [ffff88801a054740, ffff88801a0547e8) [ 30.375279] [ 30.375539] The buggy address belongs to the physical page: [ 30.376352] page:000000000382065c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a054 [ 30.377677] memcg:ffff888015be7401 [ 30.378193] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.378978] page_type: 0xffffffff() [ 30.379531] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.380668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015be7401 [ 30.381786] page dumped because: kasan: bad access detected [ 30.382604] [ 30.382862] Memory state around the buggy address: [ 30.383553] ffff88801a054680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.384601] ffff88801a054700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.385639] >ffff88801a054780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.386671] ^ [ 30.387274] ffff88801a054800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.388348] ffff88801a054880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.389395] ================================================================== [ 30.390575] Disabling lock debugging due to kernel taint [ 32.525346] BUG: Bad rss-counter state mm:00000000814f228a type:MM_FILEPAGES val:33 [ 32.526976] BUG: Bad rss-counter state mm:00000000814f228a type:MM_ANONPAGES val:22 [ 32.999544] BUG: Bad rss-counter state mm:0000000000e46450 type:MM_FILEPAGES val:33 [ 33.000561] BUG: Bad rss-counter state mm:0000000000e46450 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47363' (ECDSA) to the list of known hosts. 2023/06/20 19:39:05 fuzzer started 2023/06/20 19:39:06 dialing manager at localhost:36067 2023/06/20 19:39:06 checking machine... 2023/06/20 19:39:06 checking revisions... [ 33.722348] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:39:06 testing simple program... [ 33.784095] cgroup: Unknown subsys name 'net' [ 33.847856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:05 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=0000000043c0635a RCX=ffff88806c431ad0 RDX=000000000000000d RSI=0000000000000002 RDI=00000000e33ea114 RBP=ffff88800caf4d40 RSP=ffff88800db475f0 R8 =00000000c550c691 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800db47658 R15=000000000000000d RIP=ffffffff822704d3 RFL=00000206 [-----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 00007f4ec467e700 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=00007f5b899b5618 CR3=0000000018110000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035303a3933 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323234 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f94acbd1880 CR3=000000000cb0c000 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=326a691dae66e9a1c94ebab07f8bab02 XMM02=2c67c8bc2e329bc3000000000011b890 XMM03=fb795ef6d65770560000000000122598 XMM04=847a95f6ccf2254800000000000ae988 XMM05=e4cb8bb95a7664b60000000000133748 XMM06=b2fafb74c5e418f900000000001325b0 XMM07=e042d86d42eb936e0000000000122818 XMM08=53cad27cc234c02f000000000011b8f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000