syzkaller login: [ 30.245367] BUG: Bad rss-counter state mm:000000009e80bb79 type:MM_FILEPAGES val:33 [ 30.246967] BUG: Bad rss-counter state mm:000000009e80bb79 type:MM_ANONPAGES val:22 [ 30.415505] ================================================================== [ 30.416649] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.417839] Read of size 8 at addr ffff88800e406228 by task sshd/218 [ 30.418909] [ 30.419188] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.420262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.421492] Call Trace: [ 30.421909] <TASK> [ 30.422274] dump_stack_lvl+0x91/0xf0 [ 30.422942] print_report+0xcc/0x620 [ 30.423582] ? __virt_addr_valid+0x102/0x340 [ 30.424326] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.425184] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.425958] kasan_report+0xbe/0xf0 [ 30.426462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.427112] vma_interval_tree_remove+0xc75/0xec0 [ 30.427747] vma_prepare+0xc54/0x11a0 [ 30.428250] __split_vma+0x5af/0x950 [ 30.428764] ? __pfx___split_vma+0x10/0x10 [ 30.429323] ? find_held_lock+0x2c/0x110 [ 30.429879] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.430479] ? lock_is_held_type+0x9f/0x120 [ 30.431052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.431694] ? mtree_range_walk+0x632/0x900 [ 30.432290] ? mas_walk+0x5c7/0x7c0 [ 30.432799] do_vmi_munmap+0x1f1/0x2b0 [ 30.433333] mmap_region+0x1f9/0x2660 [ 30.433861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.434399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.435155] ? __pfx_lock_acquire+0x10/0x10 [ 30.435704] ? __pfx_mmap_region+0x10/0x10 [ 30.436275] ? security_mmap_addr+0x7d/0xa0 [ 30.436877] ? get_unmapped_area+0x1f5/0x3f0 [ 30.437457] do_mmap+0x854/0xf00 [ 30.437934] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.438447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.439045] ksys_mmap_pgoff+0x3af/0x500 [ 30.439590] do_syscall_64+0x3f/0x90 [ 30.440101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.440821] RIP: 0033:0x7f2a0e399d82 [ 30.441319] 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 [ 30.443545] RSP: 002b:00007ffc772758c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.444491] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a0e399d82 [ 30.445410] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a0d7d3000 [ 30.446311] RBP: 00007f2a0d7d3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.447204] R10: 0000000000000812 R11: 0000000000000206 R12: 000055583f98dec0 [ 30.448102] R13: 00007ffc772758e0 R14: 00007ffc77275910 R15: 00007ffc77275c70 [ 30.449023] </TASK> [ 30.449330] [ 30.449557] Allocated by task 211: [ 30.450033] kasan_save_stack+0x22/0x50 [ 30.450562] kasan_set_track+0x25/0x30 [ 30.451078] __kasan_slab_alloc+0x59/0x70 [ 30.451632] kmem_cache_alloc+0x16b/0x370 [ 30.452184] vm_area_dup+0x20/0x160 [ 30.452669] __split_vma+0x170/0x950 [ 30.453208] split_vma+0xc6/0x110 [ 30.453728] mprotect_fixup+0x8d2/0xb30 [ 30.454294] do_mprotect_pkey+0x87e/0xd40 [ 30.454880] __x64_sys_mprotect+0x78/0xc0 [ 30.455441] do_syscall_64+0x3f/0x90 [ 30.455958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.456648] [ 30.456912] Freed by task 211: [ 30.457338] kasan_save_stack+0x22/0x50 [ 30.457893] kasan_set_track+0x25/0x30 [ 30.458409] kasan_save_free_info+0x2b/0x50 [ 30.459005] __kasan_slab_free+0x10a/0x190 [ 30.459555] kmem_cache_free+0x10d/0x4d0 [ 30.460095] rcu_core+0x8c8/0x2860 [ 30.460582] __do_softirq+0x1b7/0x7d4 [ 30.461122] [ 30.461347] Last potentially related work creation: [ 30.461964] kasan_save_stack+0x22/0x50 [ 30.462495] __kasan_record_aux_stack+0x8e/0xa0 [ 30.463117] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.463802] remove_vma+0x139/0x170 [ 30.464288] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.464928] do_vmi_munmap+0x1f1/0x2b0 [ 30.465436] __vm_munmap+0x138/0x3a0 [ 30.465936] __x64_sys_munmap+0x59/0x80 [ 30.466470] do_syscall_64+0x3f/0x90 [ 30.467010] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.467704] [ 30.467952] Second to last potentially related work creation: [ 30.468665] kasan_save_stack+0x22/0x50 [ 30.469222] __kasan_record_aux_stack+0x8e/0xa0 [ 30.469848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.470554] remove_vma+0x139/0x170 [ 30.471050] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.471649] do_vmi_munmap+0x1f1/0x2b0 [ 30.472194] mmap_region+0x1f9/0x2660 [ 30.472709] do_mmap+0x854/0xf00 [ 30.473217] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.473786] ksys_mmap_pgoff+0x3af/0x500 [ 30.474448] do_syscall_64+0x3f/0x90 [ 30.475064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.475858] [ 30.476133] The buggy address belongs to the object at ffff88800e4061d0 [ 30.476133] which belongs to the cache vm_area_struct of size 168 [ 30.478069] The buggy address is located 88 bytes inside of [ 30.478069] freed 168-byte region [ffff88800e4061d0, ffff88800e406278) [ 30.479881] [ 30.480122] The buggy address belongs to the physical page: [ 30.480817] page:0000000016ac7c9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe406 [ 30.482223] memcg:ffff88801449d801 [ 30.482676] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.483402] page_type: 0xffffffff() [ 30.483891] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.484884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801449d801 [ 30.485819] page dumped because: kasan: bad access detected [ 30.486501] [ 30.486725] Memory state around the buggy address: [ 30.487338] ffff88800e406100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.488263] ffff88800e406180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.489182] >ffff88800e406200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.490100] ^ [ 30.490692] ffff88800e406280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.491577] ffff88800e406300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.492474] ================================================================== [ 30.493671] Disabling lock debugging due to kernel taint [ 32.636874] BUG: Bad rss-counter state mm:00000000acd91705 type:MM_FILEPAGES val:33 [ 32.637699] BUG: Bad rss-counter state mm:00000000acd91705 type:MM_ANONPAGES val:22 [ 33.134317] BUG: Bad rss-counter state mm:00000000744977c9 type:MM_FILEPAGES val:33 [ 33.135513] BUG: Bad rss-counter state mm:00000000744977c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53031' (ECDSA) to the list of known hosts. 2023/06/21 01:56:54 fuzzer started 2023/06/21 01:56:54 dialing manager at localhost:36067 2023/06/21 01:56:54 checking machine... 2023/06/21 01:56:54 checking revisions... [ 33.895882] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:56:54 testing simple program... [ 33.923910] cgroup: Unknown subsys name 'net' [ 33.953264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:56:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d9b3680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888015aafb40 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888015aafdb0 R13=ffff888015aafdc8 R14=ffff888015aafe00 R15=dffffc0000000000 RIP=ffffffff814c0404 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 00007f77ea660900 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=00007f77eac180b0 CR3=000000000cb98000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=00007f717b4ef690 CR3=000000000ccf2000 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=7334a517658a41a9e24d06b93d231000 XMM02=000000000011b998ec2efd57dc4c00df XMM03=0000000000121ba0bb77682bc8b248db XMM04=72331a6c468f686800000000000ae988 XMM05=b1686e412a32f1fe0000000000134250 XMM06=bdf2e299e47b49d50000000000132988 XMM07=e042d86d42eb936e0000000000121e20 XMM08=bb77682bc8b248db000000000011b9f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000