syzkaller login: [ 31.766923] BUG: Bad rss-counter state mm:000000008d31aed7 type:MM_FILEPAGES val:33 [ 31.767728] BUG: Bad rss-counter state mm:000000008d31aed7 type:MM_ANONPAGES val:22 [ 31.798523] ================================================================== [ 31.799195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.799852] Read of size 8 at addr ffff8880162e74e0 by task sshd/220 [ 31.800358] [ 31.800497] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.801248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.801917] Call Trace: [ 31.802145] [ 31.802349] dump_stack_lvl+0x91/0xf0 [ 31.802687] print_report+0xcc/0x620 [ 31.802998] ? __virt_addr_valid+0x102/0x340 [ 31.803374] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.803824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.804225] kasan_report+0xbe/0xf0 [ 31.804530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.804942] vma_interval_tree_remove+0xc75/0xec0 [ 31.805330] vma_prepare+0xc54/0x11a0 [ 31.805650] __split_vma+0x5af/0x950 [ 31.805973] ? __pfx___split_vma+0x10/0x10 [ 31.806322] ? find_held_lock+0x2c/0x110 [ 31.806685] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.807079] ? lock_is_held_type+0x9f/0x120 [ 31.807441] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.807893] ? mtree_range_walk+0x632/0x900 [ 31.808272] ? mas_walk+0x5c7/0x7c0 [ 31.808600] do_vmi_munmap+0x1f1/0x2b0 [ 31.808958] mmap_region+0x1f9/0x2660 [ 31.809291] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.809649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.810150] ? __pfx_lock_acquire+0x10/0x10 [ 31.810535] ? __pfx_mmap_region+0x10/0x10 [ 31.810921] ? security_mmap_addr+0x7d/0xa0 [ 31.811289] ? get_unmapped_area+0x1f5/0x3f0 [ 31.811728] do_mmap+0x854/0xf00 [ 31.812029] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.812350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.812749] ksys_mmap_pgoff+0x3af/0x500 [ 31.813112] do_syscall_64+0x3f/0x90 [ 31.813446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.813907] RIP: 0033:0x7faebfa92d82 [ 31.814222] 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 [ 31.815870] RSP: 002b:00007ffda472b938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.816501] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faebfa92d82 [ 31.817077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faebeecc000 [ 31.817626] RBP: 00007faebeecc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.818204] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564235b4af70 [ 31.818804] R13: 00007ffda472b950 R14: 00007ffda472b980 R15: 00007ffda472bce0 [ 31.819396] [ 31.819632] [ 31.819789] Allocated by task 213: [ 31.820075] kasan_save_stack+0x22/0x50 [ 31.820421] kasan_set_track+0x25/0x30 [ 31.820763] __kasan_slab_alloc+0x59/0x70 [ 31.821119] kmem_cache_alloc+0x16b/0x370 [ 31.821454] vm_area_dup+0x20/0x160 [ 31.821774] __split_vma+0x170/0x950 [ 31.822098] split_vma+0xc6/0x110 [ 31.822402] mprotect_fixup+0x8d2/0xb30 [ 31.822757] do_mprotect_pkey+0x87e/0xd40 [ 31.823125] __x64_sys_mprotect+0x78/0xc0 [ 31.823481] do_syscall_64+0x3f/0x90 [ 31.823856] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.824207] [ 31.824326] Freed by task 213: [ 31.824540] kasan_save_stack+0x22/0x50 [ 31.824820] kasan_set_track+0x25/0x30 [ 31.825090] kasan_save_free_info+0x2b/0x50 [ 31.825377] __kasan_slab_free+0x10a/0x190 [ 31.825664] kmem_cache_free+0x10d/0x4d0 [ 31.825944] rcu_core+0x8c8/0x2860 [ 31.826189] __do_softirq+0x1b7/0x7d4 [ 31.826450] [ 31.826567] Last potentially related work creation: [ 31.826891] kasan_save_stack+0x22/0x50 [ 31.827164] __kasan_record_aux_stack+0x8e/0xa0 [ 31.827473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.827850] remove_vma+0x139/0x170 [ 31.828093] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.828400] do_vmi_munmap+0x1f1/0x2b0 [ 31.828666] __vm_munmap+0x138/0x3a0 [ 31.828920] __x64_sys_munmap+0x59/0x80 [ 31.829187] do_syscall_64+0x3f/0x90 [ 31.829443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.829800] [ 31.829918] Second to last potentially related work creation: [ 31.830291] kasan_save_stack+0x22/0x50 [ 31.830564] __kasan_record_aux_stack+0x8e/0xa0 [ 31.830877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.831221] remove_vma+0x139/0x170 [ 31.831464] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.831797] do_vmi_munmap+0x1f1/0x2b0 [ 31.832063] mmap_region+0x1f9/0x2660 [ 31.832323] do_mmap+0x854/0xf00 [ 31.832558] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.832824] ksys_mmap_pgoff+0x7d/0x500 [ 31.833092] do_syscall_64+0x3f/0x90 [ 31.833352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.833703] [ 31.833819] The buggy address belongs to the object at ffff8880162e7488 [ 31.833819] which belongs to the cache vm_area_struct of size 168 [ 31.834617] The buggy address is located 88 bytes inside of [ 31.834617] freed 168-byte region [ffff8880162e7488, ffff8880162e7530) [ 31.835392] [ 31.835622] The buggy address belongs to the physical page: [ 31.836040] page:0000000043e3cf98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x162e7 [ 31.836720] memcg:ffff8880100c2d01 [ 31.836986] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.837472] page_type: 0xffffffff() [ 31.837811] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 31.838438] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880100c2d01 [ 31.839045] page dumped because: kasan: bad access detected [ 31.839563] [ 31.839710] Memory state around the buggy address: [ 31.840076] ffff8880162e7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.840627] ffff8880162e7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.841219] >ffff8880162e7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.841794] ^ [ 31.842355] ffff8880162e7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.842939] ffff8880162e7580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.843534] ================================================================== [ 31.844280] Disabling lock debugging due to kernel taint [ 33.490688] BUG: Bad rss-counter state mm:00000000129e819f type:MM_FILEPAGES val:33 [ 33.491411] BUG: Bad rss-counter state mm:00000000129e819f type:MM_ANONPAGES val:22 [ 33.878508] BUG: Bad rss-counter state mm:00000000ea0b44b3 type:MM_FILEPAGES val:33 [ 33.879751] BUG: Bad rss-counter state mm:00000000ea0b44b3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20643' (ECDSA) to the list of known hosts. 2023/06/20 08:39:26 fuzzer started 2023/06/20 08:39:26 dialing manager at localhost:44161 2023/06/20 08:39:26 checking machine... 2023/06/20 08:39:26 checking revisions... [ 34.474838] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:39:26 testing simple program... [ 34.507429] cgroup: Unknown subsys name 'net' [ 34.548074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:39:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f7b587be310 CR3=000000000c6c8000 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=fd1bb31ce7467590224cf07a2f797f74 XMM02=000000000011dd88eff9b2d0a8fce9cb XMM03=000000000011de582c67c8bc2e329bc3 XMM04=1319425c01771a2d00000000000ae988 XMM05=19e9129bd510f2350000000000135728 XMM06=4fda316b135da52b00000000001355b0 XMM07=e042d86d42eb936e0000000000124748 XMM08=e55cfb27b0429310000000000011de58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff888016fbb680 RSI=ffffffff8184cdc1 RDI=ffff88801a1b2700 RBP=ffff88801a1b2724 RSP=ffff88801619f9f8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=ffff888016cf18c0 RIP=ffffffff811430ce 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 00007f9f47d6c900 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=00007ffeb49e5000 CR3=000000001000c000 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=6720646572637465733a4d41503d706f 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