syzkaller login: [ 30.949152] BUG: Bad rss-counter state mm:00000000166385aa type:MM_FILEPAGES val:33 [ 30.950819] BUG: Bad rss-counter state mm:00000000166385aa type:MM_ANONPAGES val:22 [ 31.072223] ================================================================== [ 31.073383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.074544] Read of size 8 at addr ffff888009716ed8 by task sshd/223 [ 31.075594] [ 31.075876] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.076930] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.078110] Call Trace: [ 31.078451] [ 31.078735] dump_stack_lvl+0x91/0xf0 [ 31.079221] print_report+0xcc/0x620 [ 31.079712] ? __virt_addr_valid+0x102/0x340 [ 31.080262] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.080874] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.081504] kasan_report+0xbe/0xf0 [ 31.082016] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.082651] vma_interval_tree_remove+0xc75/0xec0 [ 31.083256] vma_prepare+0xc54/0x11a0 [ 31.083751] __split_vma+0x5af/0x950 [ 31.084239] ? __pfx___split_vma+0x10/0x10 [ 31.084793] ? find_held_lock+0x2c/0x110 [ 31.085311] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.085888] ? lock_is_held_type+0x9f/0x120 [ 31.086432] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.087033] ? mtree_range_walk+0x632/0x900 [ 31.087586] ? mas_walk+0x5c7/0x7c0 [ 31.088065] do_vmi_munmap+0x1f1/0x2b0 [ 31.088555] mmap_region+0x1f9/0x2660 [ 31.089041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.089558] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.090315] ? __pfx_lock_acquire+0x10/0x10 [ 31.090867] ? __pfx_mmap_region+0x10/0x10 [ 31.091401] ? security_mmap_addr+0x7d/0xa0 [ 31.091936] ? get_unmapped_area+0x1f5/0x3f0 [ 31.092491] do_mmap+0x854/0xf00 [ 31.092926] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.093435] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.094009] ksys_mmap_pgoff+0x3af/0x500 [ 31.094525] do_syscall_64+0x3f/0x90 [ 31.095005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095654] RIP: 0033:0x7ffb4ac49d82 [ 31.096113] 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 [ 31.098277] RSP: 002b:00007fff952c00c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.099205] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb4ac49d82 [ 31.100090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb4a083000 [ 31.100958] RBP: 00007ffb4a083000 R08: 0000000000000009 R09: 0000000000001000 [ 31.101830] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d133ac7ec0 [ 31.102678] R13: 00007fff952c00e0 R14: 00007fff952c0110 R15: 00007fff952c0470 [ 31.103571] [ 31.103865] [ 31.104089] Allocated by task 216: [ 31.104515] kasan_save_stack+0x22/0x50 [ 31.105019] kasan_set_track+0x25/0x30 [ 31.105520] __kasan_slab_alloc+0x59/0x70 [ 31.106056] kmem_cache_alloc+0x16b/0x370 [ 31.106569] vm_area_dup+0x20/0x160 [ 31.107031] __split_vma+0x170/0x950 [ 31.107493] split_vma+0xc6/0x110 [ 31.107945] mprotect_fixup+0x8d2/0xb30 [ 31.108450] do_mprotect_pkey+0x87e/0xd40 [ 31.108974] __x64_sys_mprotect+0x78/0xc0 [ 31.109508] do_syscall_64+0x3f/0x90 [ 31.110008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.110671] [ 31.110888] Freed by task 204: [ 31.111288] kasan_save_stack+0x22/0x50 [ 31.111803] kasan_set_track+0x25/0x30 [ 31.112299] kasan_save_free_info+0x2b/0x50 [ 31.112829] __kasan_slab_free+0x10a/0x190 [ 31.113381] kmem_cache_free+0x10d/0x4d0 [ 31.113916] rcu_core+0x8c8/0x2860 [ 31.114373] __do_softirq+0x1b7/0x7d4 [ 31.114852] [ 31.115076] Last potentially related work creation: [ 31.115663] kasan_save_stack+0x22/0x50 [ 31.116167] __kasan_record_aux_stack+0x8e/0xa0 [ 31.116783] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.117439] remove_vma+0x139/0x170 [ 31.117906] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.118472] do_vmi_munmap+0x1f1/0x2b0 [ 31.118962] __vm_munmap+0x138/0x3a0 [ 31.119430] __x64_sys_munmap+0x59/0x80 [ 31.119926] do_syscall_64+0x3f/0x90 [ 31.120406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121049] [ 31.121263] The buggy address belongs to the object at ffff888009716e80 [ 31.121263] which belongs to the cache vm_area_struct of size 168 [ 31.122753] The buggy address is located 88 bytes inside of [ 31.122753] freed 168-byte region [ffff888009716e80, ffff888009716f28) [ 31.124170] [ 31.124390] The buggy address belongs to the physical page: [ 31.125043] page:00000000851107f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9716 [ 31.126146] memcg:ffff88801a4ab501 [ 31.126585] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.127248] page_type: 0xffffffff() [ 31.127702] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.128631] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a4ab501 [ 31.129554] page dumped because: kasan: bad access detected [ 31.130230] [ 31.130447] Memory state around the buggy address: [ 31.131037] ffff888009716d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.131902] ffff888009716e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.132762] >ffff888009716e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.133640] ^ [ 31.134377] ffff888009716f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.135235] ffff888009716f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.136095] ================================================================== [ 31.137104] Disabling lock debugging due to kernel taint [ 33.241737] BUG: Bad rss-counter state mm:00000000b80c8f2a type:MM_FILEPAGES val:33 [ 33.242997] BUG: Bad rss-counter state mm:00000000b80c8f2a type:MM_ANONPAGES val:22 [ 33.857051] BUG: Bad rss-counter state mm:0000000030095642 type:MM_FILEPAGES val:33 [ 33.858323] BUG: Bad rss-counter state mm:0000000030095642 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35432' (ECDSA) to the list of known hosts. 2023/06/20 14:56:47 fuzzer started 2023/06/20 14:56:47 dialing manager at localhost:36067 2023/06/20 14:56:47 checking machine... 2023/06/20 14:56:47 checking revisions... [ 34.529850] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:56:47 testing simple program... [ 34.582947] cgroup: Unknown subsys name 'net' [ 34.625875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:56:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e53f4b8 RCX=0000000000000001 RDX=1ffff11001ca7e99 RSI=ffff88800e53fea0 RDI=ffff88800e53f4c8 RBP=ffff88800e53fea0 RSP=ffff88800e53f410 R8 =ffffffff8614277e R9 =ffff88800e53f4f8 R10=0000000000038001 R11=0000000000022713 R12=0000000000000008 R13=ffff88800e538000 R14=ffff88800e53fea8 R15=ffff88800e53f4b8 RIP=ffffffff81130468 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 00007f783ab27700 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=00007ffce0773ef8 CR3=000000000f30a000 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=2036343a36353a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3233 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3233325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a36353a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000246 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=ffffffff856d84a0 RSP=ffff88800da77620 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff8880087b8500 R13=ffff88800db2df80 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff845118ad 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 00007fcb12fb3900 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=00007f6d8e84e650 CR3=000000001017c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e3fdf5e8c5d9409300000000000ae988 XMM05=3b64fc65d25165100000000000133018 XMM06=db20f175d54767f00000000000131e08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000