syzkaller login: [ 39.646768] BUG: Bad rss-counter state mm:00000000a84b3a55 type:MM_FILEPAGES val:33 [ 39.647293] BUG: Bad rss-counter state mm:00000000a84b3a55 type:MM_ANONPAGES val:22 [ 39.789893] ================================================================== [ 39.790554] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.791212] Read of size 8 at addr ffff88801039f880 by task sshd/222 [ 39.791719] [ 39.791868] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.792439] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.793076] Call Trace: [ 39.793295] [ 39.793483] dump_stack_lvl+0x91/0xf0 [ 39.793819] print_report+0xcc/0x620 [ 39.794150] ? __virt_addr_valid+0x102/0x340 [ 39.794518] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.794976] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.795392] kasan_report+0xbe/0xf0 [ 39.795705] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.796113] vma_interval_tree_remove+0xc75/0xec0 [ 39.796503] vma_prepare+0xc54/0x11a0 [ 39.796821] __split_vma+0x5af/0x950 [ 39.797141] ? __pfx___split_vma+0x10/0x10 [ 39.797489] ? find_held_lock+0x2c/0x110 [ 39.797838] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.798209] ? lock_is_held_type+0x9f/0x120 [ 39.798562] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.798999] ? mtree_range_walk+0x632/0x900 [ 39.799683] ? mas_walk+0x5c7/0x7c0 [ 39.799983] do_vmi_munmap+0x1f1/0x2b0 [ 39.800301] mmap_region+0x1f9/0x2660 [ 39.800606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.800931] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.801381] ? __pfx_lock_acquire+0x10/0x10 [ 39.801717] ? __pfx_mmap_region+0x10/0x10 [ 39.802048] ? security_mmap_addr+0x7d/0xa0 [ 39.802394] ? get_unmapped_area+0x1f5/0x3f0 [ 39.802828] do_mmap+0x854/0xf00 [ 39.803151] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.803475] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.803840] ksys_mmap_pgoff+0x3af/0x500 [ 39.804197] do_syscall_64+0x3f/0x90 [ 39.804536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.804971] RIP: 0033:0x7f0500096d82 [ 39.805278] 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 [ 39.806670] RSP: 002b:00007ffe92b5b5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.807281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0500096d82 [ 39.807809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04ff4d0000 [ 39.808333] RBP: 00007f04ff4d0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.808854] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da38057b20 [ 39.809387] R13: 00007ffe92b5b5e0 R14: 00007ffe92b5b610 R15: 00007ffe92b5b970 [ 39.809924] [ 39.810111] [ 39.810246] Allocated by task 215: [ 39.810514] kasan_save_stack+0x22/0x50 [ 39.810871] kasan_set_track+0x25/0x30 [ 39.811221] __kasan_slab_alloc+0x59/0x70 [ 39.811561] kmem_cache_alloc+0x16b/0x370 [ 39.811901] vm_area_dup+0x20/0x160 [ 39.812207] __split_vma+0x170/0x950 [ 39.812515] split_vma+0xc6/0x110 [ 39.812813] mprotect_fixup+0x8d2/0xb30 [ 39.813145] do_mprotect_pkey+0x87e/0xd40 [ 39.813494] __x64_sys_mprotect+0x78/0xc0 [ 39.813844] do_syscall_64+0x3f/0x90 [ 39.814170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.814604] [ 39.814797] Freed by task 215: [ 39.815051] kasan_save_stack+0x22/0x50 [ 39.815367] kasan_set_track+0x25/0x30 [ 39.815674] kasan_save_free_info+0x2b/0x50 [ 39.816006] __kasan_slab_free+0x10a/0x190 [ 39.816351] kmem_cache_free+0x10d/0x4d0 [ 39.816674] rcu_core+0x8c8/0x2860 [ 39.816958] __do_softirq+0x1b7/0x7d4 [ 39.817262] [ 39.817401] Last potentially related work creation: [ 39.817769] kasan_save_stack+0x22/0x50 [ 39.818087] __kasan_record_aux_stack+0x8e/0xa0 [ 39.818458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.818943] remove_vma+0x139/0x170 [ 39.819235] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.819584] do_vmi_munmap+0x1f1/0x2b0 [ 39.819893] __vm_munmap+0x138/0x3a0 [ 39.820214] __x64_sys_munmap+0x59/0x80 [ 39.820528] do_syscall_64+0x3f/0x90 [ 39.820826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.821238] [ 39.821377] The buggy address belongs to the object at ffff88801039f828 [ 39.821377] which belongs to the cache vm_area_struct of size 168 [ 39.822299] The buggy address is located 88 bytes inside of [ 39.822299] freed 168-byte region [ffff88801039f828, ffff88801039f8d0) [ 39.823224] [ 39.823365] The buggy address belongs to the physical page: [ 39.823781] page:00000000852db4e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1039f [ 39.824467] memcg:ffff888018153c01 [ 39.824735] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.825147] page_type: 0xffffffff() [ 39.825435] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 39.826016] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018153c01 [ 39.826587] page dumped because: kasan: bad access detected [ 39.827054] [ 39.827208] Memory state around the buggy address: [ 39.827573] ffff88801039f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.828117] ffff88801039f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.828686] >ffff88801039f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.829247] ^ [ 39.829507] ffff88801039f900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.830043] ffff88801039f980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.830635] ================================================================== [ 39.831645] Disabling lock debugging due to kernel taint [ 43.034469] BUG: Bad rss-counter state mm:0000000033ad28af type:MM_FILEPAGES val:33 [ 43.035202] BUG: Bad rss-counter state mm:0000000033ad28af type:MM_ANONPAGES val:22 [ 43.891658] BUG: Bad rss-counter state mm:00000000b0f1a0ae type:MM_FILEPAGES val:33 [ 43.892355] BUG: Bad rss-counter state mm:00000000b0f1a0ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64545' (ECDSA) to the list of known hosts. 2023/06/20 09:59:24 fuzzer started 2023/06/20 09:59:24 dialing manager at localhost:44161 2023/06/20 09:59:24 checking machine... 2023/06/20 09:59:24 checking revisions... [ 44.678469] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:59:25 testing simple program... [ 44.742602] cgroup: Unknown subsys name 'net' [ 44.785850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:59:23 Registers: info registers vcpu 0 RAX=0000000001200011 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801828fe01 RSI=ffff88801828fdf8 RDI=ffff88801828fdf8 RBP=ffff88801828f6f8 RSP=ffff88801828f630 R8 =0000000000000001 R9 =ffff88801828f6e0 R10=0000000000038001 R11=000000000000712d R12=ffff88801828f700 R13=ffff88801828f6e8 R14=ffff88801828fdf8 R15=ffff88801828f6a0 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007faaed058900 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=00007feb14f49f20 CR3=000000000e7fe000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f58d8b2c328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000