syzkaller login: [ 30.797527] BUG: Bad rss-counter state mm:000000003fc57476 type:MM_FILEPAGES val:33 [ 30.798750] BUG: Bad rss-counter state mm:000000003fc57476 type:MM_ANONPAGES val:22 [ 30.835641] ================================================================== [ 30.836620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.837555] Read of size 8 at addr ffff8880182913f8 by task sshd/221 [ 30.838433] [ 30.838650] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.839520] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.840700] Call Trace: [ 30.841085] [ 30.841435] dump_stack_lvl+0x91/0xf0 [ 30.842015] print_report+0xcc/0x620 [ 30.842585] ? __virt_addr_valid+0x102/0x340 [ 30.843233] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843955] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844702] kasan_report+0xbe/0xf0 [ 30.845268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846009] vma_interval_tree_remove+0xc75/0xec0 [ 30.846725] vma_prepare+0xc54/0x11a0 [ 30.847291] __split_vma+0x5af/0x950 [ 30.847850] ? __pfx___split_vma+0x10/0x10 [ 30.848472] ? find_held_lock+0x2c/0x110 [ 30.849087] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.849777] ? lock_is_held_type+0x9f/0x120 [ 30.850339] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.850945] ? mtree_range_walk+0x632/0x900 [ 30.851494] ? mas_walk+0x5c7/0x7c0 [ 30.851972] do_vmi_munmap+0x1f1/0x2b0 [ 30.852460] mmap_region+0x1f9/0x2660 [ 30.852944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.853466] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854184] ? __pfx_lock_acquire+0x10/0x10 [ 30.854705] ? __pfx_mmap_region+0x10/0x10 [ 30.855236] ? security_mmap_addr+0x7d/0xa0 [ 30.855766] ? get_unmapped_area+0x1f5/0x3f0 [ 30.856315] do_mmap+0x854/0xf00 [ 30.856748] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.857249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.857812] ksys_mmap_pgoff+0x3af/0x500 [ 30.858311] do_syscall_64+0x3f/0x90 [ 30.858794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859431] RIP: 0033:0x7f7b61899d82 [ 30.859892] 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 [ 30.862013] RSP: 002b:00007fffc88c3ce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.862918] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b61899d82 [ 30.863760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b60cd3000 [ 30.864593] RBP: 00007f7b60cd3000 R08: 0000000000000009 R09: 0000000000001000 [ 30.865434] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e04a81ec0 [ 30.866272] R13: 00007fffc88c3d00 R14: 00007fffc88c3d30 R15: 00007fffc88c4090 [ 30.867109] [ 30.867396] [ 30.867612] Allocated by task 214: [ 30.868043] kasan_save_stack+0x22/0x50 [ 30.868545] kasan_set_track+0x25/0x30 [ 30.869031] __kasan_slab_alloc+0x59/0x70 [ 30.869571] kmem_cache_alloc+0x16b/0x370 [ 30.870088] vm_area_dup+0x20/0x160 [ 30.870540] __split_vma+0x170/0x950 [ 30.871012] split_vma+0xc6/0x110 [ 30.871452] mprotect_fixup+0x8d2/0xb30 [ 30.871961] do_mprotect_pkey+0x87e/0xd40 [ 30.872479] __x64_sys_mprotect+0x78/0xc0 [ 30.872994] do_syscall_64+0x3f/0x90 [ 30.873482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874129] [ 30.874340] Freed by task 204: [ 30.874734] kasan_save_stack+0x22/0x50 [ 30.875237] kasan_set_track+0x25/0x30 [ 30.875727] kasan_save_free_info+0x2b/0x50 [ 30.876260] __kasan_slab_free+0x10a/0x190 [ 30.876793] kmem_cache_free+0x10d/0x4d0 [ 30.877306] rcu_core+0x8c8/0x2860 [ 30.877745] __do_softirq+0x1b7/0x7d4 [ 30.878224] [ 30.878436] Last potentially related work creation: [ 30.879010] kasan_save_stack+0x22/0x50 [ 30.879510] __kasan_record_aux_stack+0x8e/0xa0 [ 30.880077] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.880724] remove_vma+0x139/0x170 [ 30.881176] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.881748] do_vmi_munmap+0x1f1/0x2b0 [ 30.882231] __vm_munmap+0x138/0x3a0 [ 30.882694] __x64_sys_munmap+0x59/0x80 [ 30.883180] do_syscall_64+0x3f/0x90 [ 30.883657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884297] [ 30.884509] The buggy address belongs to the object at ffff8880182913a0 [ 30.884509] which belongs to the cache vm_area_struct of size 168 [ 30.885973] The buggy address is located 88 bytes inside of [ 30.885973] freed 168-byte region [ffff8880182913a0, ffff888018291448) [ 30.887377] [ 30.887592] The buggy address belongs to the physical page: [ 30.888250] page:00000000cf158e34 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18291 [ 30.889345] memcg:ffff888019eb9e01 [ 30.889772] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.890465] page_type: 0xffffffff() [ 30.890920] raw: 0100000000000200 ffff8880087a0c80 ffffea000060a580 dead000000000005 [ 30.891832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019eb9e01 [ 30.892727] page dumped because: kasan: bad access detected [ 30.893395] [ 30.893610] Memory state around the buggy address: [ 30.894185] ffff888018291280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.895084] ffff888018291300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.895949] >ffff888018291380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.896790] ^ [ 30.897638] ffff888018291400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.898495] ffff888018291480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.899341] ================================================================== [ 30.900439] Disabling lock debugging due to kernel taint [ 33.772941] BUG: Bad rss-counter state mm:000000008fb35e8c type:MM_FILEPAGES val:33 [ 33.774106] BUG: Bad rss-counter state mm:000000008fb35e8c type:MM_ANONPAGES val:22 [ 34.223166] BUG: Bad rss-counter state mm:000000005ada9985 type:MM_FILEPAGES val:33 [ 34.224314] BUG: Bad rss-counter state mm:000000005ada9985 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31552' (ECDSA) to the list of known hosts. 2023/06/20 11:25:37 fuzzer started 2023/06/20 11:25:37 dialing manager at localhost:36067 2023/06/20 11:25:37 checking machine... 2023/06/20 11:25:37 checking revisions... [ 34.850343] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:25:37 testing simple program... [ 34.905405] cgroup: Unknown subsys name 'net' [ 34.963249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:25:36 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=00007f51f22db000 CR3=00000000094c2000 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=2036333a35323a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a35323a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff81807029 RSP=ffff88800f677668 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=ffffffff81806f71 R12=ffff88800844f780 R13=ffff88806cf3de20 R14=ffff88806cf3de20 R15=ffff88806cf3de00 RIP=ffffffff8135b935 RFL=00000047 [---Z-PC] 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 00007fc804d0d900 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=00007ffcd53f8000 CR3=000000000edaa000 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