syzkaller login: [ 30.092068] BUG: Bad rss-counter state mm:00000000cf2a01d1 type:MM_FILEPAGES val:33 [ 30.093285] BUG: Bad rss-counter state mm:00000000cf2a01d1 type:MM_ANONPAGES val:22 [ 30.242158] ================================================================== [ 30.243086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.244056] Read of size 8 at addr ffff88800ed33880 by task sshd/219 [ 30.245024] [ 30.245258] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.246166] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.247175] Call Trace: [ 30.247501] [ 30.247796] dump_stack_lvl+0x91/0xf0 [ 30.248307] print_report+0xcc/0x620 [ 30.248811] ? __virt_addr_valid+0x102/0x340 [ 30.249375] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250036] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.250668] kasan_report+0xbe/0xf0 [ 30.251179] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251815] vma_interval_tree_remove+0xc75/0xec0 [ 30.252419] vma_prepare+0xc54/0x11a0 [ 30.252923] __split_vma+0x5af/0x950 [ 30.253411] ? __pfx___split_vma+0x10/0x10 [ 30.253979] ? find_held_lock+0x2c/0x110 [ 30.254516] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.255111] ? lock_is_held_type+0x9f/0x120 [ 30.255656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.256296] ? mtree_range_walk+0x632/0x900 [ 30.256871] ? mas_walk+0x5c7/0x7c0 [ 30.257353] do_vmi_munmap+0x1f1/0x2b0 [ 30.257886] mmap_region+0x1f9/0x2660 [ 30.258378] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.258914] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.259634] ? __pfx_lock_acquire+0x10/0x10 [ 30.260204] ? __pfx_mmap_region+0x10/0x10 [ 30.260736] ? security_mmap_addr+0x7d/0xa0 [ 30.261291] ? get_unmapped_area+0x1f5/0x3f0 [ 30.261883] do_mmap+0x854/0xf00 [ 30.262332] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.262864] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.263437] ksys_mmap_pgoff+0x3af/0x500 [ 30.263976] do_syscall_64+0x3f/0x90 [ 30.264464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265143] RIP: 0033:0x7f0ec16dbd82 [ 30.265618] 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 [ 30.267825] RSP: 002b:00007ffff68db208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.268745] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ec16dbd82 [ 30.269641] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ec0b15000 [ 30.270510] RBP: 00007f0ec0b15000 R08: 0000000000000009 R09: 0000000000001000 [ 30.271377] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6cbd45b20 [ 30.272257] R13: 00007ffff68db220 R14: 00007ffff68db250 R15: 00007ffff68db5b0 [ 30.273143] [ 30.273448] [ 30.273684] Allocated by task 212: [ 30.274139] kasan_save_stack+0x22/0x50 [ 30.274666] kasan_set_track+0x25/0x30 [ 30.275171] __kasan_slab_alloc+0x59/0x70 [ 30.275669] kmem_cache_alloc+0x16b/0x370 [ 30.276183] vm_area_dup+0x20/0x160 [ 30.276615] __split_vma+0x170/0x950 [ 30.277081] split_vma+0xc6/0x110 [ 30.277505] mprotect_fixup+0x8d2/0xb30 [ 30.278003] do_mprotect_pkey+0x87e/0xd40 [ 30.278495] __x64_sys_mprotect+0x78/0xc0 [ 30.279009] do_syscall_64+0x3f/0x90 [ 30.279457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.280087] [ 30.280295] Freed by task 212: [ 30.280675] kasan_save_stack+0x22/0x50 [ 30.281166] kasan_set_track+0x25/0x30 [ 30.281657] kasan_save_free_info+0x2b/0x50 [ 30.282181] __kasan_slab_free+0x10a/0x190 [ 30.282686] kmem_cache_free+0x10d/0x4d0 [ 30.283179] rcu_core+0x8c8/0x2860 [ 30.283601] __do_softirq+0x1b7/0x7d4 [ 30.284078] [ 30.284289] Last potentially related work creation: [ 30.284875] kasan_save_stack+0x22/0x50 [ 30.285376] __kasan_record_aux_stack+0x8e/0xa0 [ 30.285979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.286621] remove_vma+0x139/0x170 [ 30.287086] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.287646] do_vmi_munmap+0x1f1/0x2b0 [ 30.288146] __vm_munmap+0x138/0x3a0 [ 30.288602] __x64_sys_munmap+0x59/0x80 [ 30.289103] do_syscall_64+0x3f/0x90 [ 30.289583] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.290234] [ 30.290453] Second to last potentially related work creation: [ 30.291151] kasan_save_stack+0x22/0x50 [ 30.291658] __kasan_record_aux_stack+0x8e/0xa0 [ 30.292242] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.292888] remove_vma+0x139/0x170 [ 30.293340] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.293929] do_vmi_munmap+0x1f1/0x2b0 [ 30.294404] mmap_region+0x1f9/0x2660 [ 30.294896] do_mmap+0x854/0xf00 [ 30.295325] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.295821] ksys_mmap_pgoff+0x3af/0x500 [ 30.296313] do_syscall_64+0x3f/0x90 [ 30.296797] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297445] [ 30.297668] The buggy address belongs to the object at ffff88800ed33828 [ 30.297668] which belongs to the cache vm_area_struct of size 168 [ 30.299063] The buggy address is located 88 bytes inside of [ 30.299063] freed 168-byte region [ffff88800ed33828, ffff88800ed338d0) [ 30.300393] [ 30.300607] The buggy address belongs to the physical page: [ 30.301262] page:00000000a46e6eb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed33 [ 30.302335] memcg:ffff88800f5d8201 [ 30.302757] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.303450] page_type: 0xffffffff() [ 30.303912] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.304835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f5d8201 [ 30.305742] page dumped because: kasan: bad access detected [ 30.306411] [ 30.306618] Memory state around the buggy address: [ 30.307207] ffff88800ed33780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.308062] ffff88800ed33800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.308933] >ffff88800ed33880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.309825] ^ [ 30.310240] ffff88800ed33900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.311133] ffff88800ed33980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.312014] ================================================================== [ 30.313031] Disabling lock debugging due to kernel taint [ 32.307300] BUG: Bad rss-counter state mm:0000000061545bdf type:MM_FILEPAGES val:33 [ 32.308842] BUG: Bad rss-counter state mm:0000000061545bdf type:MM_ANONPAGES val:22 [ 32.778096] BUG: Bad rss-counter state mm:00000000e9ae48f4 type:MM_FILEPAGES val:33 [ 32.779151] BUG: Bad rss-counter state mm:00000000e9ae48f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60993' (ECDSA) to the list of known hosts. 2023/06/21 00:01:58 fuzzer started 2023/06/21 00:01:58 dialing manager at localhost:36067 2023/06/21 00:01:58 checking machine... 2023/06/21 00:01:58 checking revisions... [ 33.572356] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:01:58 testing simple program... [ 33.625254] cgroup: Unknown subsys name 'net' [ 33.686297] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:01:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff888016b00000 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff8540a110 RSP=ffff88806ce09f80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000100 R13=0000000000000009 R14=0000000000000000 R15=0000000000000009 RIP=ffffffff8453806c RFL=00000046 [---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 00007f1fc7cf5700 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=00007f1bcac6c0b0 CR3=0000000019e0c000 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=3a5d3832325b646873732037353a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383730 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=00007f5f05292570 CR3=000000000c992000 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=294f4cc859b98795534e8af5bf01d7ed XMM02=000000000011b390eff9b2d0a8fce9cb XMM03=000000000011b4602c67c8bc2e329bc3 XMM04=67a0dbf49d5d0b3200000000000ae988 XMM05=dfcdbad4f1609c3700000000001331e0 XMM06=569a14707e21ba690000000000132048 XMM07=e042d86d42eb936e0000000000122350 XMM08=6493057ebc959230000000000011b460 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000