syzkaller login: [ 36.709459] BUG: Bad rss-counter state mm:000000004c6b18cb type:MM_FILEPAGES val:33 [ 36.710658] BUG: Bad rss-counter state mm:000000004c6b18cb type:MM_ANONPAGES val:22 [ 36.751189] ================================================================== [ 36.752177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.753332] Read of size 8 at addr ffff88800d632a50 by task sshd/218 [ 36.754230] [ 36.754463] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.755325] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.756419] Call Trace: [ 36.756763] [ 36.757110] dump_stack_lvl+0x91/0xf0 [ 36.757738] print_report+0xcc/0x620 [ 36.758321] ? __virt_addr_valid+0x102/0x340 [ 36.758965] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.759666] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.760379] kasan_report+0xbe/0xf0 [ 36.760938] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.761627] vma_interval_tree_remove+0xc75/0xec0 [ 36.762312] vma_prepare+0xc54/0x11a0 [ 36.762790] __split_vma+0x5af/0x950 [ 36.763337] ? __pfx___split_vma+0x10/0x10 [ 36.763970] ? find_held_lock+0x2c/0x110 [ 36.764512] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.765070] ? lock_is_held_type+0x9f/0x120 [ 36.765603] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.766216] ? mtree_range_walk+0x632/0x900 [ 36.766772] ? mas_walk+0x5c7/0x7c0 [ 36.767251] do_vmi_munmap+0x1f1/0x2b0 [ 36.767748] mmap_region+0x1f9/0x2660 [ 36.768234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.768761] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.769468] ? __pfx_lock_acquire+0x10/0x10 [ 36.769994] ? __pfx_mmap_region+0x10/0x10 [ 36.770523] ? security_mmap_addr+0x7d/0xa0 [ 36.771059] ? get_unmapped_area+0x1f5/0x3f0 [ 36.771616] do_mmap+0x854/0xf00 [ 36.772058] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.772574] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.773147] ksys_mmap_pgoff+0x3af/0x500 [ 36.773662] do_syscall_64+0x3f/0x90 [ 36.774147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.774812] RIP: 0033:0x7f214724bd82 [ 36.775275] 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 [ 36.777429] RSP: 002b:00007ffe6dc86e58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.778343] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f214724bd82 [ 36.779195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2146685000 [ 36.780038] RBP: 00007f2146685000 R08: 0000000000000009 R09: 0000000000001000 [ 36.780913] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f56cfbfd90 [ 36.781761] R13: 00007ffe6dc86e70 R14: 00007ffe6dc86ea0 R15: 00007ffe6dc87200 [ 36.782609] [ 36.782902] [ 36.783117] Allocated by task 211: [ 36.783549] kasan_save_stack+0x22/0x50 [ 36.784053] kasan_set_track+0x25/0x30 [ 36.784553] __kasan_slab_alloc+0x59/0x70 [ 36.785082] kmem_cache_alloc+0x16b/0x370 [ 36.785588] vm_area_dup+0x20/0x160 [ 36.786046] __split_vma+0x170/0x950 [ 36.786509] split_vma+0xc6/0x110 [ 36.786942] mprotect_fixup+0x8d2/0xb30 [ 36.787451] do_mprotect_pkey+0x87e/0xd40 [ 36.787967] __x64_sys_mprotect+0x78/0xc0 [ 36.788493] do_syscall_64+0x3f/0x90 [ 36.788968] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.789614] [ 36.789827] Freed by task 211: [ 36.790223] kasan_save_stack+0x22/0x50 [ 36.790731] kasan_set_track+0x25/0x30 [ 36.791219] kasan_save_free_info+0x2b/0x50 [ 36.791753] __kasan_slab_free+0x10a/0x190 [ 36.792298] kmem_cache_free+0x10d/0x4d0 [ 36.792813] rcu_core+0x8c8/0x2860 [ 36.793262] __do_softirq+0x1b7/0x7d4 [ 36.793742] [ 36.793959] Last potentially related work creation: [ 36.794546] kasan_save_stack+0x22/0x50 [ 36.795051] __kasan_record_aux_stack+0x8e/0xa0 [ 36.795696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.796350] remove_vma+0x139/0x170 [ 36.796805] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.797358] do_vmi_munmap+0x1f1/0x2b0 [ 36.797844] __vm_munmap+0x138/0x3a0 [ 36.798309] __x64_sys_munmap+0x59/0x80 [ 36.798804] do_syscall_64+0x3f/0x90 [ 36.799282] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.799929] [ 36.800146] The buggy address belongs to the object at ffff88800d6329f8 [ 36.800146] which belongs to the cache vm_area_struct of size 168 [ 36.801621] The buggy address is located 88 bytes inside of [ 36.801621] freed 168-byte region [ffff88800d6329f8, ffff88800d632aa0) [ 36.803034] [ 36.803252] The buggy address belongs to the physical page: [ 36.803906] page:00000000681227ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd632 [ 36.804990] memcg:ffff88800f23a001 [ 36.805415] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.806059] page_type: 0xffffffff() [ 36.806510] raw: 0100000000000200 ffff8880087a0c80 ffffea0000399100 dead000000000008 [ 36.807458] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f23a001 [ 36.808395] page dumped because: kasan: bad access detected [ 36.809084] [ 36.809312] Memory state around the buggy address: [ 36.809904] ffff88800d632900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.810783] ffff88800d632980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 36.811682] >ffff88800d632a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.812566] ^ [ 36.813272] ffff88800d632a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.814141] ffff88800d632b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.815010] ================================================================== [ 36.815996] Disabling lock debugging due to kernel taint [ 38.829618] BUG: Bad rss-counter state mm:0000000027bd7b59 type:MM_FILEPAGES val:33 [ 38.830665] BUG: Bad rss-counter state mm:0000000027bd7b59 type:MM_ANONPAGES val:22 [ 39.391874] BUG: Bad rss-counter state mm:00000000824490af type:MM_FILEPAGES val:33 [ 39.393029] BUG: Bad rss-counter state mm:00000000824490af type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11115' (ECDSA) to the list of known hosts. 2023/06/20 21:55:38 fuzzer started 2023/06/20 21:55:39 dialing manager at localhost:36067 2023/06/20 21:55:39 checking machine... 2023/06/20 21:55:39 checking revisions... [ 39.996682] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:55:39 testing simple program... [ 40.043859] cgroup: Unknown subsys name 'net' [ 40.110160] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:55:38 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff8880164ed1c0 RSI=ffffffff83c60bc0 RDI=ffffffff87f97830 RBP=0000000000000000 RSP=ffff888019e976a0 R8 =0000000000000005 R9 =00000000000000ff R10=0000000000000085 R11=0000092c0000092c R12=0000000000000000 R13=0000000000000085 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0871 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 00007f31b0da0900 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=00007fff2726f000 CR3=00000000180d2000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fc8bf4c93b0 CR3=0000000015b80000 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=35353a3132203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000