syzkaller login: [ 30.718985] BUG: Bad rss-counter state mm:0000000027fcc959 type:MM_FILEPAGES val:33 [ 30.719801] BUG: Bad rss-counter state mm:0000000027fcc959 type:MM_ANONPAGES val:22 [ 30.838483] ================================================================== [ 30.839120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.839736] Read of size 8 at addr ffff888016372880 by task sshd/220 [ 30.840253] [ 30.840402] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.840984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.841606] Call Trace: [ 30.841809] [ 30.841989] dump_stack_lvl+0x91/0xf0 [ 30.842304] print_report+0xcc/0x620 [ 30.842613] ? __virt_addr_valid+0x102/0x340 [ 30.843174] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843586] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843985] kasan_report+0xbe/0xf0 [ 30.844305] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844756] vma_interval_tree_remove+0xc75/0xec0 [ 30.845144] vma_prepare+0xc54/0x11a0 [ 30.845473] __split_vma+0x5af/0x950 [ 30.845780] ? __pfx___split_vma+0x10/0x10 [ 30.846125] ? find_held_lock+0x2c/0x110 [ 30.846466] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.846834] ? lock_is_held_type+0x9f/0x120 [ 30.847187] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.847579] ? mtree_range_walk+0x632/0x900 [ 30.847933] ? mas_walk+0x5c7/0x7c0 [ 30.848240] do_vmi_munmap+0x1f1/0x2b0 [ 30.848556] mmap_region+0x1f9/0x2660 [ 30.848900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.849236] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.849691] ? __pfx_lock_acquire+0x10/0x10 [ 30.850030] ? __pfx_mmap_region+0x10/0x10 [ 30.850373] ? security_mmap_addr+0x7d/0xa0 [ 30.850718] ? get_unmapped_area+0x1f5/0x3f0 [ 30.851078] do_mmap+0x854/0xf00 [ 30.851367] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.851689] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.852055] ksys_mmap_pgoff+0x3af/0x500 [ 30.852391] do_syscall_64+0x3f/0x90 [ 30.852755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.853169] RIP: 0033:0x7f8a6d27ad82 [ 30.853464] 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 [ 30.854831] RSP: 002b:00007ffd24ef35d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.855414] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a6d27ad82 [ 30.855962] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a6c6b4000 [ 30.856528] RBP: 00007f8a6c6b4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.857113] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4dc113d90 [ 30.857666] R13: 00007ffd24ef35f0 R14: 00007ffd24ef3620 R15: 00007ffd24ef3980 [ 30.858212] [ 30.858402] [ 30.858541] Allocated by task 213: [ 30.858818] kasan_save_stack+0x22/0x50 [ 30.859155] kasan_set_track+0x25/0x30 [ 30.859478] __kasan_slab_alloc+0x59/0x70 [ 30.859812] kmem_cache_alloc+0x16b/0x370 [ 30.860142] vm_area_dup+0x20/0x160 [ 30.860434] __split_vma+0x170/0x950 [ 30.860776] split_vma+0xc6/0x110 [ 30.861057] mprotect_fixup+0x8d2/0xb30 [ 30.861377] do_mprotect_pkey+0x87e/0xd40 [ 30.861707] __x64_sys_mprotect+0x78/0xc0 [ 30.862037] do_syscall_64+0x3f/0x90 [ 30.862353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862769] [ 30.862907] Freed by task 213: [ 30.863161] kasan_save_stack+0x22/0x50 [ 30.863487] kasan_set_track+0x25/0x30 [ 30.863806] kasan_save_free_info+0x2b/0x50 [ 30.864157] __kasan_slab_free+0x10a/0x190 [ 30.864495] kmem_cache_free+0x10d/0x4d0 [ 30.864853] rcu_core+0x8c8/0x2860 [ 30.865137] __do_softirq+0x1b7/0x7d4 [ 30.865444] [ 30.865582] Last potentially related work creation: [ 30.865960] kasan_save_stack+0x22/0x50 [ 30.866281] __kasan_record_aux_stack+0x8e/0xa0 [ 30.866649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.867053] remove_vma+0x139/0x170 [ 30.867337] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.867688] do_vmi_munmap+0x1f1/0x2b0 [ 30.868008] __vm_munmap+0x138/0x3a0 [ 30.868307] __x64_sys_munmap+0x59/0x80 [ 30.868688] do_syscall_64+0x3f/0x90 [ 30.868995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.869413] [ 30.869547] The buggy address belongs to the object at ffff888016372828 [ 30.869547] which belongs to the cache vm_area_struct of size 168 [ 30.870482] The buggy address is located 88 bytes inside of [ 30.870482] freed 168-byte region [ffff888016372828, ffff8880163728d0) [ 30.871375] [ 30.871512] The buggy address belongs to the physical page: [ 30.871944] page:000000000143d9a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16372 [ 30.872661] memcg:ffff88801a24d801 [ 30.872932] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.873355] page_type: 0xffffffff() [ 30.873654] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.874269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a24d801 [ 30.874878] page dumped because: kasan: bad access detected [ 30.875309] [ 30.875448] Memory state around the buggy address: [ 30.875824] ffff888016372780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.876393] ffff888016372800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.876971] >ffff888016372880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.877519] ^ [ 30.877783] ffff888016372900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.878346] ffff888016372980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.878907] ================================================================== [ 30.879560] Disabling lock debugging due to kernel taint [ 32.563061] BUG: Bad rss-counter state mm:0000000091952435 type:MM_FILEPAGES val:33 [ 32.563756] BUG: Bad rss-counter state mm:0000000091952435 type:MM_ANONPAGES val:22 [ 32.910124] BUG: Bad rss-counter state mm:0000000019d3eede type:MM_FILEPAGES val:33 [ 32.910820] BUG: Bad rss-counter state mm:0000000019d3eede type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44988' (ECDSA) to the list of known hosts. 2023/06/21 09:00:45 fuzzer started 2023/06/21 09:00:45 dialing manager at localhost:36067 2023/06/21 09:00:45 checking machine... 2023/06/21 09:00:45 checking revisions... [ 33.467248] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:00:45 testing simple program... [ 33.501292] cgroup: Unknown subsys name 'net' [ 33.534287] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:45 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f2bf6b4d4a0 CR3=000000000c508000 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=b4d0bb6d15c20ea87348b2a2a8147600 XMM02=000000000011a1c0eff9b2d0a8fce9cb XMM03=000000000011a2902c67c8bc2e329bc3 XMM04=ddae68548bbd4a8c00000000000ae988 XMM05=19e9129bd510f2350000000000131668 XMM06=4fda316b135da52b00000000001314f0 XMM07=e042d86d42eb936e0000000000121a28 XMM08=bf44bd978c0e6bad000000000011a290 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800ce951c0 RSI=ffffffff8449fcef RDI=0000000000000005 RBP=ffff88800eeda658 RSP=ffff88801623edf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000003 R11=ffff88801cb4081c R12=0000000000000003 R13=ffff88800d6adcc0 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff814c0880 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 00007fd8d688e900 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=00007fd8d6847008 CR3=000000000e27e000 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