syzkaller login: [ 30.784475] BUG: Bad rss-counter state mm:0000000044c6f444 type:MM_FILEPAGES val:33 [ 30.785497] BUG: Bad rss-counter state mm:0000000044c6f444 type:MM_ANONPAGES val:22 [ 30.939889] ================================================================== [ 30.940779] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.941738] Read of size 8 at addr ffff8880159d0140 by task sshd/220 [ 30.942526] [ 30.942744] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.943714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944721] Call Trace: [ 30.945041] [ 30.945324] dump_stack_lvl+0x91/0xf0 [ 30.945837] print_report+0xcc/0x620 [ 30.946333] ? __virt_addr_valid+0x102/0x340 [ 30.946887] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947508] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948135] kasan_report+0xbe/0xf0 [ 30.948620] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.949242] vma_interval_tree_remove+0xc75/0xec0 [ 30.949866] vma_prepare+0xc54/0x11a0 [ 30.950358] __split_vma+0x5af/0x950 [ 30.950839] ? __pfx___split_vma+0x10/0x10 [ 30.951365] ? find_held_lock+0x2c/0x110 [ 30.951889] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952458] ? lock_is_held_type+0x9f/0x120 [ 30.953006] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953618] ? mtree_range_walk+0x632/0x900 [ 30.954186] ? mas_walk+0x5c7/0x7c0 [ 30.954666] do_vmi_munmap+0x1f1/0x2b0 [ 30.955163] mmap_region+0x1f9/0x2660 [ 30.955650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.956163] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.956885] ? __pfx_lock_acquire+0x10/0x10 [ 30.957419] ? __pfx_mmap_region+0x10/0x10 [ 30.957969] ? security_mmap_addr+0x7d/0xa0 [ 30.958510] ? get_unmapped_area+0x1f5/0x3f0 [ 30.959064] do_mmap+0x854/0xf00 [ 30.959515] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.960018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.960581] ksys_mmap_pgoff+0x3af/0x500 [ 30.961101] do_syscall_64+0x3f/0x90 [ 30.961586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.962249] RIP: 0033:0x7f0e6e8b0d82 [ 30.962702] 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 [ 30.964864] RSP: 002b:00007ffc230a6478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.965790] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0e6e8b0d82 [ 30.966719] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0e6dcea000 [ 30.967634] RBP: 00007f0e6dcea000 R08: 0000000000000009 R09: 0000000000001000 [ 30.968546] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a776e6f70 [ 30.969452] R13: 00007ffc230a6490 R14: 00007ffc230a64c0 R15: 00007ffc230a6820 [ 30.970380] [ 30.970687] [ 30.970916] Allocated by task 213: [ 30.971378] kasan_save_stack+0x22/0x50 [ 30.971911] kasan_set_track+0x25/0x30 [ 30.972439] __kasan_slab_alloc+0x59/0x70 [ 30.972999] kmem_cache_alloc+0x16b/0x370 [ 30.973546] vm_area_dup+0x20/0x160 [ 30.974050] __split_vma+0x170/0x950 [ 30.974530] split_vma+0xc6/0x110 [ 30.974987] mprotect_fixup+0x8d2/0xb30 [ 30.975508] do_mprotect_pkey+0x87e/0xd40 [ 30.976055] __x64_sys_mprotect+0x78/0xc0 [ 30.976604] do_syscall_64+0x3f/0x90 [ 30.977098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977763] [ 30.978002] Freed by task 213: [ 30.978418] kasan_save_stack+0x22/0x50 [ 30.978942] kasan_set_track+0x25/0x30 [ 30.979455] kasan_save_free_info+0x2b/0x50 [ 30.980009] __kasan_slab_free+0x10a/0x190 [ 30.980563] kmem_cache_free+0x10d/0x4d0 [ 30.981095] rcu_core+0x8c8/0x2860 [ 30.981562] __do_softirq+0x1b7/0x7d4 [ 30.982068] [ 30.982297] Last potentially related work creation: [ 30.982910] kasan_save_stack+0x22/0x50 [ 30.983440] __kasan_record_aux_stack+0x8e/0xa0 [ 30.984036] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.984764] remove_vma+0x139/0x170 [ 30.985232] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.985828] do_vmi_munmap+0x1f1/0x2b0 [ 30.986339] __vm_munmap+0x138/0x3a0 [ 30.986821] __x64_sys_munmap+0x59/0x80 [ 30.987343] do_syscall_64+0x3f/0x90 [ 30.987837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.988513] [ 30.988736] The buggy address belongs to the object at ffff8880159d00e8 [ 30.988736] which belongs to the cache vm_area_struct of size 168 [ 30.990282] The buggy address is located 88 bytes inside of [ 30.990282] freed 168-byte region [ffff8880159d00e8, ffff8880159d0190) [ 30.991741] [ 30.991972] The buggy address belongs to the physical page: [ 30.992662] page:0000000029e3e299 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159d0 [ 30.993827] memcg:ffff88800ed5ea01 [ 30.994276] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.994952] page_type: 0xffffffff() [ 30.995425] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.996384] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed5ea01 [ 30.997326] page dumped because: kasan: bad access detected [ 30.998026] [ 30.998246] Memory state around the buggy address: [ 30.998855] ffff8880159d0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.999749] ffff8880159d0080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.000653] >ffff8880159d0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.001552] ^ [ 31.002233] ffff8880159d0180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.003131] ffff8880159d0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.004017] ================================================================== [ 31.004975] Disabling lock debugging due to kernel taint [ 32.930169] BUG: Bad rss-counter state mm:00000000e4bbde9d type:MM_FILEPAGES val:33 [ 32.931342] BUG: Bad rss-counter state mm:00000000e4bbde9d type:MM_ANONPAGES val:22 [ 33.483636] BUG: Bad rss-counter state mm:0000000017ded3c7 type:MM_FILEPAGES val:33 [ 33.484781] BUG: Bad rss-counter state mm:0000000017ded3c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50749' (ECDSA) to the list of known hosts. 2023/06/20 12:40:19 fuzzer started 2023/06/20 12:40:20 dialing manager at localhost:36067 2023/06/20 12:40:20 checking machine... 2023/06/20 12:40:20 checking revisions... [ 34.091879] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:40:20 testing simple program... [ 34.139235] cgroup: Unknown subsys name 'net' [ 34.184908] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:40:19 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=00007f29f4e82650 CR3=000000000e922000 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=30343a3231203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039313a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff8880107eebe2 RCX=ffffffff81f3493d RDX=ffff888015b151c0 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000000000002 RSP=ffff8880165d7980 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000000002 R11=0000000000000000 R12=0000000000000700 R13=ffff8880107eebe0 R14=dffffc0000000000 R15=0000000000000002 RIP=ffffffff814c086b 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 00007f29f48cd900 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=00007f29f4e84618 CR3=000000000ddee000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000