syzkaller login: [ 31.761933] BUG: Bad rss-counter state mm:000000008f913fb7 type:MM_FILEPAGES val:33 [ 31.763473] BUG: Bad rss-counter state mm:000000008f913fb7 type:MM_ANONPAGES val:22 [ 31.939971] ================================================================== [ 31.941190] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.942410] Read of size 8 at addr ffff888019b69df0 by task sshd/221 [ 31.943317] [ 31.943580] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.944651] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.945804] Call Trace: [ 31.946184] [ 31.946522] dump_stack_lvl+0x91/0xf0 [ 31.947099] print_report+0xcc/0x620 [ 31.947675] ? __virt_addr_valid+0x102/0x340 [ 31.948337] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.949106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.949871] kasan_report+0xbe/0xf0 [ 31.950454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.951233] vma_interval_tree_remove+0xc75/0xec0 [ 31.951985] vma_prepare+0xc54/0x11a0 [ 31.952593] __split_vma+0x5af/0x950 [ 31.953086] ? __pfx___split_vma+0x10/0x10 [ 31.953631] ? find_held_lock+0x2c/0x110 [ 31.954163] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.954742] ? lock_is_held_type+0x9f/0x120 [ 31.955294] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.955916] ? mtree_range_walk+0x632/0x900 [ 31.956490] ? mas_walk+0x5c7/0x7c0 [ 31.956979] do_vmi_munmap+0x1f1/0x2b0 [ 31.957484] mmap_region+0x1f9/0x2660 [ 31.957977] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.958500] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.959256] ? __pfx_lock_acquire+0x10/0x10 [ 31.959803] ? __pfx_mmap_region+0x10/0x10 [ 31.960367] ? security_mmap_addr+0x7d/0xa0 [ 31.960919] ? get_unmapped_area+0x1f5/0x3f0 [ 31.961483] do_mmap+0x854/0xf00 [ 31.961939] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.962445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.963021] ksys_mmap_pgoff+0x3af/0x500 [ 31.963540] do_syscall_64+0x3f/0x90 [ 31.964030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.964702] RIP: 0033:0x7f4d68cbdd82 [ 31.965174] 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 [ 31.967362] RSP: 002b:00007ffe91baaf68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.968309] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d68cbdd82 [ 31.969182] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d680f7000 [ 31.970049] RBP: 00007f4d680f7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.970916] R10: 0000000000000812 R11: 0000000000000206 R12: 00005558ee90dec0 [ 31.971785] R13: 00007ffe91baaf80 R14: 00007ffe91baafb0 R15: 00007ffe91bab310 [ 31.972690] [ 31.972986] [ 31.973203] Allocated by task 214: [ 31.973646] kasan_save_stack+0x22/0x50 [ 31.974159] kasan_set_track+0x25/0x30 [ 31.974662] __kasan_slab_alloc+0x59/0x70 [ 31.975210] kmem_cache_alloc+0x16b/0x370 [ 31.975734] vm_area_dup+0x20/0x160 [ 31.976210] __split_vma+0x170/0x950 [ 31.976688] split_vma+0xc6/0x110 [ 31.977137] mprotect_fixup+0x8d2/0xb30 [ 31.977662] do_mprotect_pkey+0x87e/0xd40 [ 31.978201] __x64_sys_mprotect+0x78/0xc0 [ 31.978731] do_syscall_64+0x3f/0x90 [ 31.979216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.979875] [ 31.980095] Freed by task 214: [ 31.980517] kasan_save_stack+0x22/0x50 [ 31.981036] kasan_set_track+0x25/0x30 [ 31.981537] kasan_save_free_info+0x2b/0x50 [ 31.982084] __kasan_slab_free+0x10a/0x190 [ 31.982628] kmem_cache_free+0x10d/0x4d0 [ 31.983144] rcu_core+0x8c8/0x2860 [ 31.983595] __do_softirq+0x1b7/0x7d4 [ 31.984082] [ 31.984316] Last potentially related work creation: [ 31.984923] kasan_save_stack+0x22/0x50 [ 31.985437] __kasan_record_aux_stack+0x8e/0xa0 [ 31.986023] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.986682] remove_vma+0x139/0x170 [ 31.987139] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.987709] do_vmi_munmap+0x1f1/0x2b0 [ 31.988218] __vm_munmap+0x138/0x3a0 [ 31.988700] __x64_sys_munmap+0x59/0x80 [ 31.989210] do_syscall_64+0x3f/0x90 [ 31.989695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.990352] [ 31.990572] The buggy address belongs to the object at ffff888019b69d98 [ 31.990572] which belongs to the cache vm_area_struct of size 168 [ 31.992086] The buggy address is located 88 bytes inside of [ 31.992086] freed 168-byte region [ffff888019b69d98, ffff888019b69e40) [ 31.993539] [ 31.993759] The buggy address belongs to the physical page: [ 31.994439] page:00000000a7aa0cac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b69 [ 31.995562] memcg:ffff888015b8f701 [ 31.995999] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.996678] page_type: 0xffffffff() [ 31.997147] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.998094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b8f701 [ 31.999019] page dumped because: kasan: bad access detected [ 31.999701] [ 31.999920] Memory state around the buggy address: [ 32.000528] ffff888019b69c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.001404] ffff888019b69d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.002285] >ffff888019b69d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.003154] ^ [ 32.003985] ffff888019b69e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.004870] ffff888019b69e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.005741] ================================================================== [ 32.006934] Disabling lock debugging due to kernel taint [ 34.076170] BUG: Bad rss-counter state mm:00000000ce9b9679 type:MM_FILEPAGES val:33 [ 34.077111] BUG: Bad rss-counter state mm:00000000ce9b9679 type:MM_ANONPAGES val:22 [ 34.555932] BUG: Bad rss-counter state mm:0000000028074851 type:MM_FILEPAGES val:33 [ 34.557089] BUG: Bad rss-counter state mm:0000000028074851 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14607' (ECDSA) to the list of known hosts. 2023/06/19 11:19:20 fuzzer started 2023/06/19 11:19:20 dialing manager at localhost:44161 2023/06/19 11:19:20 checking machine... 2023/06/19 11:19:20 checking revisions... [ 35.271370] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:19:20 testing simple program... [ 35.309396] cgroup: Unknown subsys name 'net' [ 35.348522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:19:18 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=0000000000000001 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=00007eff0c944970 CR3=000000000c7b6000 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=a4cbe053e07195a0a94cb707764b4baf XMM02=2c67c8bc2e329bc3000000000011d348 XMM03=fb795ef6d657705600000000001248c0 XMM04=c8b76773aea39a8900000000000ae988 XMM05=e4cb8bb95a7664b60000000000134468 XMM06=6612b49b1487375100000000001332d0 XMM07=e042d86d42eb936e0000000000124b40 XMM08=88546ce8e46c56fd000000000011d3a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100134afb5 RBX=ffff888009a57d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888009a57da8 RBP=ffff88800e52d000 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e543b80 R14=ffffffff8186b9c5 R15=ffff88800ee44f00 RIP=ffffffff81846362 RFL=00000046 [---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 00007f19b1719900 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=00007fff70714000 CR3=000000001bfac000 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