syzkaller login: [ 29.077683] BUG: Bad rss-counter state mm:0000000006e22b30 type:MM_FILEPAGES val:33 [ 29.078691] BUG: Bad rss-counter state mm:0000000006e22b30 type:MM_ANONPAGES val:22 [ 29.232893] ================================================================== [ 29.233791] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.234723] Read of size 8 at addr ffff8880169285c8 by task sshd/220 [ 29.235491] [ 29.235718] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.236747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.237721] Call Trace: [ 29.238049] [ 29.238332] dump_stack_lvl+0x91/0xf0 [ 29.238839] print_report+0xcc/0x620 [ 29.239320] ? __virt_addr_valid+0x102/0x340 [ 29.239877] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.240539] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.241257] kasan_report+0xbe/0xf0 [ 29.241744] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.242373] vma_interval_tree_remove+0xc75/0xec0 [ 29.242977] vma_prepare+0xc54/0x11a0 [ 29.243459] __split_vma+0x5af/0x950 [ 29.243926] ? __pfx___split_vma+0x10/0x10 [ 29.244464] ? find_held_lock+0x2c/0x110 [ 29.244986] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.245552] ? lock_is_held_type+0x9f/0x120 [ 29.246087] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.246698] ? mtree_range_walk+0x632/0x900 [ 29.247254] ? mas_walk+0x5c7/0x7c0 [ 29.247728] do_vmi_munmap+0x1f1/0x2b0 [ 29.248237] mmap_region+0x1f9/0x2660 [ 29.248719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.249234] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.249947] ? __pfx_lock_acquire+0x10/0x10 [ 29.250478] ? __pfx_mmap_region+0x10/0x10 [ 29.251003] ? security_mmap_addr+0x7d/0xa0 [ 29.251535] ? get_unmapped_area+0x1f5/0x3f0 [ 29.252096] do_mmap+0x854/0xf00 [ 29.252539] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.253028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.253592] ksys_mmap_pgoff+0x3af/0x500 [ 29.254094] do_syscall_64+0x3f/0x90 [ 29.254570] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.255210] RIP: 0033:0x7f8e6427dd82 [ 29.255662] 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 [ 29.257792] RSP: 002b:00007ffec7e9e978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.258688] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e6427dd82 [ 29.259531] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e636b7000 [ 29.260389] RBP: 00007f8e636b7000 R08: 0000000000000009 R09: 0000000000001000 [ 29.261240] R10: 0000000000000812 R11: 0000000000000206 R12: 000055624c0bfec0 [ 29.262078] R13: 00007ffec7e9e990 R14: 00007ffec7e9e9c0 R15: 00007ffec7e9ed20 [ 29.262930] [ 29.263222] [ 29.263439] Allocated by task 213: [ 29.263865] kasan_save_stack+0x22/0x50 [ 29.264375] kasan_set_track+0x25/0x30 [ 29.264868] __kasan_slab_alloc+0x59/0x70 [ 29.265390] kmem_cache_alloc+0x16b/0x370 [ 29.265900] vm_area_dup+0x20/0x160 [ 29.266348] __split_vma+0x170/0x950 [ 29.266808] split_vma+0xc6/0x110 [ 29.267248] mprotect_fixup+0x8d2/0xb30 [ 29.267749] do_mprotect_pkey+0x87e/0xd40 [ 29.268269] __x64_sys_mprotect+0x78/0xc0 [ 29.268788] do_syscall_64+0x3f/0x90 [ 29.269261] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.269894] [ 29.270104] Freed by task 213: [ 29.270492] kasan_save_stack+0x22/0x50 [ 29.270994] kasan_set_track+0x25/0x30 [ 29.271479] kasan_save_free_info+0x2b/0x50 [ 29.272005] __kasan_slab_free+0x10a/0x190 [ 29.272553] kmem_cache_free+0x10d/0x4d0 [ 29.273059] rcu_core+0x8c8/0x2860 [ 29.273502] __do_softirq+0x1b7/0x7d4 [ 29.273977] [ 29.274189] Last potentially related work creation: [ 29.274778] kasan_save_stack+0x22/0x50 [ 29.275282] __kasan_record_aux_stack+0x8e/0xa0 [ 29.275854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.276501] remove_vma+0x139/0x170 [ 29.276955] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.277508] do_vmi_munmap+0x1f1/0x2b0 [ 29.278071] __vm_munmap+0x138/0x3a0 [ 29.278542] __x64_sys_munmap+0x59/0x80 [ 29.279037] do_syscall_64+0x3f/0x90 [ 29.279513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.280171] [ 29.280389] The buggy address belongs to the object at ffff888016928570 [ 29.280389] which belongs to the cache vm_area_struct of size 168 [ 29.281847] The buggy address is located 88 bytes inside of [ 29.281847] freed 168-byte region [ffff888016928570, ffff888016928618) [ 29.283246] [ 29.283465] The buggy address belongs to the physical page: [ 29.284132] page:0000000022aec2c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16928 [ 29.285229] memcg:ffff88800949b001 [ 29.285660] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.286303] page_type: 0xffffffff() [ 29.286753] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.287673] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800949b001 [ 29.288584] page dumped because: kasan: bad access detected [ 29.289245] [ 29.289461] Memory state around the buggy address: [ 29.290042] ffff888016928480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.290888] ffff888016928500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 29.291737] >ffff888016928580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.292622] ^ [ 29.293284] ffff888016928600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.294133] ffff888016928680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.294976] ================================================================== [ 29.295982] Disabling lock debugging due to kernel taint [ 32.074358] BUG: Bad rss-counter state mm:00000000f3fcbcfc type:MM_FILEPAGES val:33 [ 32.075445] BUG: Bad rss-counter state mm:00000000f3fcbcfc type:MM_ANONPAGES val:22 [ 32.673723] BUG: Bad rss-counter state mm:000000007eee4f05 type:MM_FILEPAGES val:33 [ 32.674934] BUG: Bad rss-counter state mm:000000007eee4f05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65103' (ECDSA) to the list of known hosts. 2023/06/21 05:50:43 fuzzer started 2023/06/21 05:50:43 dialing manager at localhost:36067 2023/06/21 05:50:43 checking machine... 2023/06/21 05:50:43 checking revisions... [ 33.324099] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:50:43 testing simple program... [ 33.383414] cgroup: Unknown subsys name 'net' [ 33.436661] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:50:43 Registers: info registers vcpu 0 RAX=1ffffffff0bc04ae RBX=ffffffff85e02570 RCX=ffffffff8184725b RDX=0000000000000000 RSI=ffffffff8613f678 RDI=ffffffff85e02564 RBP=ffffffff85e02564 RSP=ffff88800dadf7c0 R8 =ffffffff8613f678 R9 =ffff88800dadf8b8 R10=0000000000038001 R11=0000000000021ee8 R12=ffffffff85e02580 R13=ffffffff85e02564 R14=ffffffff85e02564 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f66788ce900 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=00007f6678e83650 CR3=0000000016c9e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100285df19 RBX=1ffff1100285df19 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff8880142ef8b8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ecd RFL=00000282 [--S----] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2ddd9f8900 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=00007f2ddcf16010 CR3=000000000c978000 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=7e8a42789393c4b7000000000011a330 XMM01=eff9b2d0a8fce9cb000000000011a548 XMM02=2c67c8bc2e329bc3000000000011a670 XMM03=fb795ef6d65770560000000000121aa8 XMM04=77c755e9403cea8a00000000000ae988 XMM05=509090414763696b0000000000132778 XMM06=4fda316b135da52b0000000000131818 XMM07=e042d86d42eb936e0000000000121d28 XMM08=caa47b7e50dc6da7000000000011a6d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000