syzkaller login: [ 35.592040] BUG: Bad rss-counter state mm:000000006d907634 type:MM_FILEPAGES val:33 [ 35.593924] BUG: Bad rss-counter state mm:000000006d907634 type:MM_ANONPAGES val:22 [ 35.761240] ================================================================== [ 35.762339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.763463] Read of size 8 at addr ffff88801a0306b0 by task sshd/220 [ 35.764500] [ 35.764770] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.765877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.767031] Call Trace: [ 35.767388] [ 35.767701] dump_stack_lvl+0x91/0xf0 [ 35.768253] print_report+0xcc/0x620 [ 35.768792] ? __virt_addr_valid+0x102/0x340 [ 35.769394] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.770068] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.770755] kasan_report+0xbe/0xf0 [ 35.771278] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.771942] vma_interval_tree_remove+0xc75/0xec0 [ 35.772621] vma_prepare+0xc54/0x11a0 [ 35.773141] __split_vma+0x5af/0x950 [ 35.773645] ? __pfx___split_vma+0x10/0x10 [ 35.774222] ? find_held_lock+0x2c/0x110 [ 35.774785] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.775407] ? lock_is_held_type+0x9f/0x120 [ 35.776010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.776682] ? mtree_range_walk+0x632/0x900 [ 35.777342] ? mas_walk+0x5c7/0x7c0 [ 35.777931] do_vmi_munmap+0x1f1/0x2b0 [ 35.778477] mmap_region+0x1f9/0x2660 [ 35.779009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.779573] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.780342] ? __pfx_lock_acquire+0x10/0x10 [ 35.780913] ? __pfx_mmap_region+0x10/0x10 [ 35.781483] ? security_mmap_addr+0x7d/0xa0 [ 35.782062] ? get_unmapped_area+0x1f5/0x3f0 [ 35.782668] do_mmap+0x854/0xf00 [ 35.783158] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.783703] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.784345] ksys_mmap_pgoff+0x3af/0x500 [ 35.784931] do_syscall_64+0x3f/0x90 [ 35.785448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.786160] RIP: 0033:0x7f3f6e308d82 [ 35.786669] 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 [ 35.789020] RSP: 002b:00007ffc48027c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.790021] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f6e308d82 [ 35.790951] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f6d742000 [ 35.791887] RBP: 00007f3f6d742000 R08: 0000000000000009 R09: 0000000000001000 [ 35.792877] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566e762bb20 [ 35.793830] R13: 00007ffc48027c90 R14: 00007ffc48027cc0 R15: 00007ffc48028020 [ 35.794741] [ 35.795056] [ 35.795285] Allocated by task 213: [ 35.795744] kasan_save_stack+0x22/0x50 [ 35.796295] kasan_set_track+0x25/0x30 [ 35.796821] __kasan_slab_alloc+0x59/0x70 [ 35.797376] kmem_cache_alloc+0x16b/0x370 [ 35.797928] vm_area_dup+0x20/0x160 [ 35.798414] __split_vma+0x170/0x950 [ 35.798913] split_vma+0xc6/0x110 [ 35.799384] mprotect_fixup+0x8d2/0xb30 [ 35.799931] do_mprotect_pkey+0x87e/0xd40 [ 35.800650] __x64_sys_mprotect+0x78/0xc0 [ 35.801297] do_syscall_64+0x3f/0x90 [ 35.801875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.802681] [ 35.802944] Freed by task 213: [ 35.803427] kasan_save_stack+0x22/0x50 [ 35.804026] kasan_set_track+0x25/0x30 [ 35.804749] kasan_save_free_info+0x2b/0x50 [ 35.805395] __kasan_slab_free+0x10a/0x190 [ 35.806019] kmem_cache_free+0x10d/0x4d0 [ 35.806626] rcu_core+0x8c8/0x2860 [ 35.807156] __do_softirq+0x1b7/0x7d4 [ 35.807726] [ 35.807982] Last potentially related work creation: [ 35.808729] kasan_save_stack+0x22/0x50 [ 35.809350] __kasan_record_aux_stack+0x8e/0xa0 [ 35.810078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.810916] remove_vma+0x139/0x170 [ 35.811465] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.812165] do_vmi_munmap+0x1f1/0x2b0 [ 35.812739] __vm_munmap+0x138/0x3a0 [ 35.813285] __x64_sys_munmap+0x59/0x80 [ 35.813861] do_syscall_64+0x3f/0x90 [ 35.814426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.815191] [ 35.815443] The buggy address belongs to the object at ffff88801a030658 [ 35.815443] which belongs to the cache vm_area_struct of size 168 [ 35.817164] The buggy address is located 88 bytes inside of [ 35.817164] freed 168-byte region [ffff88801a030658, ffff88801a030700) [ 35.818855] [ 35.819115] The buggy address belongs to the physical page: [ 35.819931] page:0000000099947a03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a030 [ 35.821192] memcg:ffff88800ca68701 [ 35.821618] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.822271] page_type: 0xffffffff() [ 35.822726] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 35.823650] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca68701 [ 35.824558] page dumped because: kasan: bad access detected [ 35.825225] [ 35.825441] Memory state around the buggy address: [ 35.826037] ffff88801a030580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.826927] ffff88801a030600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 35.827780] >ffff88801a030680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.828675] ^ [ 35.829275] ffff88801a030700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.830119] ffff88801a030780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.830972] ================================================================== [ 35.832111] Disabling lock debugging due to kernel taint [ 38.785091] BUG: Bad rss-counter state mm:0000000021aa63a6 type:MM_FILEPAGES val:33 [ 38.786114] BUG: Bad rss-counter state mm:0000000021aa63a6 type:MM_ANONPAGES val:22 [ 39.226678] BUG: Bad rss-counter state mm:00000000eb116d1b type:MM_FILEPAGES val:33 [ 39.227638] BUG: Bad rss-counter state mm:00000000eb116d1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24759' (ECDSA) to the list of known hosts. 2023/06/21 05:57:18 fuzzer started 2023/06/21 05:57:18 dialing manager at localhost:36067 2023/06/21 05:57:18 checking machine... 2023/06/21 05:57:18 checking revisions... [ 39.970723] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:57:18 testing simple program... [ 40.023467] cgroup: Unknown subsys name 'net' [ 40.076593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:57:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000081 RCX=0000000000000000 RDX=ffff888014698000 RSI=ffff88800df15180 RDI=fffffffffffff000 RBP=ffff88800db98138 RSP=ffff8880146978d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800df15180 R13=0000000010000000 R14=1ffff110028d2f1e R15=0000000000000000 RIP=ffffffff814c0430 RFL=00000293 [--S-A-C] 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 00007f462cea9900 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=00007f462c2d7470 CR3=000000000d906000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bf76132c45b127d100000000000ae988 XMM05=9be3d7f20dee7cad0000000000132318 XMM06=e4cb8bb95a7664b600000000001310f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001c1f05f RBX=ffff88800e0f82c8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e0f82f8 RBP=ffff88800c516780 RSP=ffff888009bc76f8 R8 =0000000000000001 R9 =ffffed1001378ed3 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800c592a00 R14=ffffffff83675648 R15=ffff888019d50600 RIP=ffffffff818464e2 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 00007fe818b0d900 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=00007fe8190c4618 CR3=000000001a330000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000