syzkaller login: [ 30.897033] BUG: Bad rss-counter state mm:00000000ac69e271 type:MM_FILEPAGES val:33 [ 30.898809] BUG: Bad rss-counter state mm:00000000ac69e271 type:MM_ANONPAGES val:22 [ 31.072410] ================================================================== [ 31.073368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.074325] Read of size 8 at addr ffff88801aa16880 by task sshd/223 [ 31.075185] [ 31.075404] CPU: 0 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.076278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.077291] Call Trace: [ 31.077609] [ 31.077900] dump_stack_lvl+0x91/0xf0 [ 31.078398] print_report+0xcc/0x620 [ 31.078890] ? __virt_addr_valid+0x102/0x340 [ 31.079473] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080728] kasan_report+0xbe/0xf0 [ 31.081211] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081832] vma_interval_tree_remove+0xc75/0xec0 [ 31.082446] vma_prepare+0xc54/0x11a0 [ 31.082926] __split_vma+0x5af/0x950 [ 31.083403] ? __pfx___split_vma+0x10/0x10 [ 31.083942] ? find_held_lock+0x2c/0x110 [ 31.084463] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.085031] ? lock_is_held_type+0x9f/0x120 [ 31.085570] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.086181] ? mtree_range_walk+0x632/0x900 [ 31.086729] ? mas_walk+0x5c7/0x7c0 [ 31.087208] do_vmi_munmap+0x1f1/0x2b0 [ 31.087714] mmap_region+0x1f9/0x2660 [ 31.088203] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.088716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.089437] ? __pfx_lock_acquire+0x10/0x10 [ 31.089974] ? __pfx_mmap_region+0x10/0x10 [ 31.090504] ? security_mmap_addr+0x7d/0xa0 [ 31.091038] ? get_unmapped_area+0x1f5/0x3f0 [ 31.091608] do_mmap+0x854/0xf00 [ 31.092049] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.092544] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.093108] ksys_mmap_pgoff+0x3af/0x500 [ 31.093615] do_syscall_64+0x3f/0x90 [ 31.094100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.094756] RIP: 0033:0x7fe347075d82 [ 31.095247] 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 [ 31.097383] RSP: 002b:00007ffd9f61bf08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.098299] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe347075d82 [ 31.099160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3464af000 [ 31.100051] RBP: 00007fe3464af000 R08: 0000000000000009 R09: 0000000000001000 [ 31.100915] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576a6751f70 [ 31.101780] R13: 00007ffd9f61bf20 R14: 00007ffd9f61bf50 R15: 00007ffd9f61c2b0 [ 31.102663] [ 31.102960] [ 31.103177] Allocated by task 216: [ 31.103620] kasan_save_stack+0x22/0x50 [ 31.104128] kasan_set_track+0x25/0x30 [ 31.104629] __kasan_slab_alloc+0x59/0x70 [ 31.105160] kmem_cache_alloc+0x16b/0x370 [ 31.105676] vm_area_dup+0x20/0x160 [ 31.106131] __split_vma+0x170/0x950 [ 31.106605] split_vma+0xc6/0x110 [ 31.107062] mprotect_fixup+0x8d2/0xb30 [ 31.107582] do_mprotect_pkey+0x87e/0xd40 [ 31.108108] __x64_sys_mprotect+0x78/0xc0 [ 31.108647] do_syscall_64+0x3f/0x90 [ 31.109126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.109786] [ 31.110006] Freed by task 216: [ 31.110408] kasan_save_stack+0x22/0x50 [ 31.110919] kasan_set_track+0x25/0x30 [ 31.111438] kasan_save_free_info+0x2b/0x50 [ 31.112002] __kasan_slab_free+0x10a/0x190 [ 31.112540] kmem_cache_free+0x10d/0x4d0 [ 31.113056] rcu_core+0x8c8/0x2860 [ 31.113511] __do_softirq+0x1b7/0x7d4 [ 31.113992] [ 31.114209] Last potentially related work creation: [ 31.114795] kasan_save_stack+0x22/0x50 [ 31.115304] __kasan_record_aux_stack+0x8e/0xa0 [ 31.115888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.116551] remove_vma+0x139/0x170 [ 31.117013] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.117574] do_vmi_munmap+0x1f1/0x2b0 [ 31.118069] __vm_munmap+0x138/0x3a0 [ 31.118538] __x64_sys_munmap+0x59/0x80 [ 31.119040] do_syscall_64+0x3f/0x90 [ 31.119560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.120215] [ 31.120434] The buggy address belongs to the object at ffff88801aa16828 [ 31.120434] which belongs to the cache vm_area_struct of size 168 [ 31.121932] The buggy address is located 88 bytes inside of [ 31.121932] freed 168-byte region [ffff88801aa16828, ffff88801aa168d0) [ 31.123344] [ 31.123579] The buggy address belongs to the physical page: [ 31.124273] page:0000000042db3839 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aa16 [ 31.125377] memcg:ffff88800b2f0401 [ 31.125814] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.126472] page_type: 0xffffffff() [ 31.126932] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.127867] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b2f0401 [ 31.128783] page dumped because: kasan: bad access detected [ 31.129449] [ 31.129665] Memory state around the buggy address: [ 31.130248] ffff88801aa16780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.131122] ffff88801aa16800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.132002] >ffff88801aa16880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.132864] ^ [ 31.133284] ffff88801aa16900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.134151] ffff88801aa16980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.135018] ================================================================== [ 31.136120] Disabling lock debugging due to kernel taint [ 32.984160] BUG: Bad rss-counter state mm:0000000046b9ac6a type:MM_FILEPAGES val:33 [ 32.985160] BUG: Bad rss-counter state mm:0000000046b9ac6a type:MM_ANONPAGES val:22 [ 33.441001] BUG: Bad rss-counter state mm:0000000083826c75 type:MM_FILEPAGES val:33 [ 33.441902] BUG: Bad rss-counter state mm:0000000083826c75 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7207' (ECDSA) to the list of known hosts. 2023/06/21 02:26:02 fuzzer started 2023/06/21 02:26:03 dialing manager at localhost:36067 2023/06/21 02:26:03 checking machine... 2023/06/21 02:26:03 checking revisions... [ 34.171326] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:26:03 testing simple program... [ 34.220297] cgroup: Unknown subsys name 'net' [ 34.269688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:26:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800f0b8488 RCX=ffffffff8145226b RDX=ffff88800fc751c0 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801827fce8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800e50b800 R13=ffff88800fc751c0 R14=ffff888016199000 R15=0000000000000000 RIP=ffffffff814c0860 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 00007fe59fc45900 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=00007ffc4c00b000 CR3=000000000ea26000 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=1ffffffff0c114ab RBX=0000000000000002 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff8608a558 RBP=ffff88806cf09aa8 RSP=ffff88806cf09990 R8 =ffffffff8608a55a R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09af8 R15=ffff88806cf09a50 RIP=ffffffff811311c7 RFL=00000212 [----A--] 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 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=00007ff540a28e50 CR3=0000000013a2c000 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=7086e4e092b0d887864b01cac5c300c7 XMM02=000000000011c250eff9b2d0a8fce9cb XMM03=000000000011c3202c67c8bc2e329bc3 XMM04=ac7d0aa80d7d450900000000000ae988 XMM05=5a9d233068761c4a0000000000132e60 XMM06=049c95b47fc433fd0000000000131cc8 XMM07=e042d86d42eb936e0000000000123288 XMM08=c5c54fc512b0dcfc000000000011c320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000