syzkaller login: [ 70.120167] BUG: Bad rss-counter state mm:0000000037b2c370 type:MM_FILEPAGES val:33 [ 70.121328] BUG: Bad rss-counter state mm:0000000037b2c370 type:MM_ANONPAGES val:22 [ 70.286006] ================================================================== [ 70.286911] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.287864] Read of size 8 at addr ffff88800df35140 by task sshd/227 [ 70.288659] [ 70.288979] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 70.289853] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.290852] Call Trace: [ 70.291199] [ 70.291487] dump_stack_lvl+0x91/0xf0 [ 70.291976] print_report+0xcc/0x620 [ 70.292477] ? __virt_addr_valid+0x102/0x340 [ 70.293047] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.293658] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.294287] kasan_report+0xbe/0xf0 [ 70.294765] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.295396] vma_interval_tree_remove+0xc75/0xec0 [ 70.296011] vma_prepare+0xc54/0x11a0 [ 70.296496] __split_vma+0x5af/0x950 [ 70.296994] ? __pfx___split_vma+0x10/0x10 [ 70.297523] ? find_held_lock+0x2c/0x110 [ 70.298053] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.298621] ? lock_is_held_type+0x9f/0x120 [ 70.299159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.299772] ? mtree_range_walk+0x632/0x900 [ 70.300330] ? mas_walk+0x5c7/0x7c0 [ 70.300817] do_vmi_munmap+0x1f1/0x2b0 [ 70.301311] mmap_region+0x1f9/0x2660 [ 70.301800] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.302327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.303037] ? __pfx_lock_acquire+0x10/0x10 [ 70.303587] ? __pfx_mmap_region+0x10/0x10 [ 70.304132] ? security_mmap_addr+0x7d/0xa0 [ 70.304675] ? get_unmapped_area+0x1f5/0x3f0 [ 70.305227] do_mmap+0x854/0xf00 [ 70.305675] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.306185] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.306754] ksys_mmap_pgoff+0x3af/0x500 [ 70.307279] do_syscall_64+0x3f/0x90 [ 70.307769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.308421] RIP: 0033:0x7f4cbe1cad82 [ 70.308900] 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 [ 70.311013] RSP: 002b:00007ffdaca31728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.311919] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cbe1cad82 [ 70.312777] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cbd604000 [ 70.313623] RBP: 00007f4cbd604000 R08: 0000000000000009 R09: 0000000000001000 [ 70.314460] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6bf8edb20 [ 70.315300] R13: 00007ffdaca31740 R14: 00007ffdaca31770 R15: 00007ffdaca31ad0 [ 70.316143] [ 70.316437] [ 70.316659] Allocated by task 220: [ 70.317082] kasan_save_stack+0x22/0x50 [ 70.317581] kasan_set_track+0x25/0x30 [ 70.318073] __kasan_slab_alloc+0x59/0x70 [ 70.318596] kmem_cache_alloc+0x16b/0x370 [ 70.319105] vm_area_dup+0x20/0x160 [ 70.319560] __split_vma+0x170/0x950 [ 70.320024] split_vma+0xc6/0x110 [ 70.320468] mprotect_fixup+0x8d2/0xb30 [ 70.320982] do_mprotect_pkey+0x87e/0xd40 [ 70.321508] __x64_sys_mprotect+0x78/0xc0 [ 70.322029] do_syscall_64+0x3f/0x90 [ 70.322504] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.323144] [ 70.323359] Freed by task 19: [ 70.323737] kasan_save_stack+0x22/0x50 [ 70.324240] kasan_set_track+0x25/0x30 [ 70.324737] kasan_save_free_info+0x2b/0x50 [ 70.325269] __kasan_slab_free+0x10a/0x190 [ 70.325810] kmem_cache_free+0x10d/0x4d0 [ 70.326315] rcu_core+0x8c8/0x2860 [ 70.326763] __do_softirq+0x1b7/0x7d4 [ 70.327242] [ 70.327460] Last potentially related work creation: [ 70.328040] kasan_save_stack+0x22/0x50 [ 70.328537] __kasan_record_aux_stack+0x8e/0xa0 [ 70.329132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.329778] remove_vma+0x139/0x170 [ 70.330225] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.330786] do_vmi_munmap+0x1f1/0x2b0 [ 70.331270] __vm_munmap+0x138/0x3a0 [ 70.331742] __x64_sys_munmap+0x59/0x80 [ 70.332233] do_syscall_64+0x3f/0x90 [ 70.332729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.333372] [ 70.333588] The buggy address belongs to the object at ffff88800df350e8 [ 70.333588] which belongs to the cache vm_area_struct of size 168 [ 70.335056] The buggy address is located 88 bytes inside of [ 70.335056] freed 168-byte region [ffff88800df350e8, ffff88800df35190) [ 70.336450] [ 70.336674] The buggy address belongs to the physical page: [ 70.337323] page:00000000331f5a71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf35 [ 70.338398] memcg:ffff888016a11701 [ 70.338818] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.339462] page_type: 0xffffffff() [ 70.339910] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 70.340931] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a11701 [ 70.341914] page dumped because: kasan: bad access detected [ 70.342586] [ 70.342805] Memory state around the buggy address: [ 70.343409] ffff88800df35000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 70.344283] ffff88800df35080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 70.345157] >ffff88800df35100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.346027] ^ [ 70.346685] ffff88800df35180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 70.347579] ffff88800df35200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 70.348459] ================================================================== [ 70.349477] Disabling lock debugging due to kernel taint [ 72.111515] BUG: Bad rss-counter state mm:000000009dc7beb3 type:MM_FILEPAGES val:33 [ 72.112283] BUG: Bad rss-counter state mm:000000009dc7beb3 type:MM_ANONPAGES val:22 [ 72.612208] BUG: Bad rss-counter state mm:00000000326aabcc type:MM_FILEPAGES val:33 [ 72.613458] BUG: Bad rss-counter state mm:00000000326aabcc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29504' (ECDSA) to the list of known hosts. 2023/06/20 05:20:13 fuzzer started 2023/06/20 05:20:13 dialing manager at localhost:44161 2023/06/20 05:20:13 checking machine... 2023/06/20 05:20:13 checking revisions... [ 73.239364] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:20:13 testing simple program... [ 73.289500] cgroup: Unknown subsys name 'net' [ 73.335536] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:20:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff8450e288 RDI=ffff88806ce09b68 RBP=000000000000000e RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba99 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800cae47a0 RIP=ffffffff813ad47f RFL=00000283 [--S---C] 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 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=00007fbb7e91a360 CR3=000000000c70e000 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=2033313a30323a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30323a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019c851c0 RSI=ffffffff81709cda RDI=0000000000000007 RBP=ffff88800dfe0bc8 RSP=ffff88800eca7a20 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000000 R14=0000000000000000 R15=00007fc605ad8000 RIP=ffffffff814c07e0 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 00007fc605aec900 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=00007fc605acb020 CR3=000000000e838000 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