syzkaller login: [ 42.124653] BUG: Bad rss-counter state mm:0000000017a49d22 type:MM_FILEPAGES val:33 [ 42.125465] BUG: Bad rss-counter state mm:0000000017a49d22 type:MM_ANONPAGES val:22 [ 42.285386] ================================================================== [ 42.285951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.286538] Read of size 8 at addr ffff88800e1deed8 by task sshd/227 [ 42.287018] [ 42.287158] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.287667] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.288243] Call Trace: [ 42.288447] [ 42.288622] dump_stack_lvl+0x91/0xf0 [ 42.288923] print_report+0xcc/0x620 [ 42.289251] ? __virt_addr_valid+0x102/0x340 [ 42.289587] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.289954] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.290327] kasan_report+0xbe/0xf0 [ 42.291576] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.291980] vma_interval_tree_remove+0xc75/0xec0 [ 42.292410] vma_prepare+0xc54/0x11a0 [ 42.292710] __split_vma+0x5af/0x950 [ 42.293000] ? __pfx___split_vma+0x10/0x10 [ 42.293379] ? find_held_lock+0x2c/0x110 [ 42.293697] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.294038] ? lock_is_held_type+0x9f/0x120 [ 42.294419] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.295483] ? mtree_range_walk+0x632/0x900 [ 42.295826] ? mas_walk+0x5c7/0x7c0 [ 42.296114] do_vmi_munmap+0x1f1/0x2b0 [ 42.296469] mmap_region+0x1f9/0x2660 [ 42.296760] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.297068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.297586] ? __pfx_lock_acquire+0x10/0x10 [ 42.297910] ? __pfx_mmap_region+0x10/0x10 [ 42.298303] ? security_mmap_addr+0x7d/0xa0 [ 42.298799] ? get_unmapped_area+0x1f5/0x3f0 [ 42.299126] do_mmap+0x854/0xf00 [ 42.299437] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.299729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.300058] ksys_mmap_pgoff+0x3af/0x500 [ 42.300491] do_syscall_64+0x3f/0x90 [ 42.300781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.301247] RIP: 0033:0x7fb029ec6d82 [ 42.301531] 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 [ 42.302947] RSP: 002b:00007fff17fa2548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.303684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb029ec6d82 [ 42.304203] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb029300000 [ 42.304766] RBP: 00007fb029300000 R08: 0000000000000009 R09: 0000000000001000 [ 42.305398] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564af3c1dec0 [ 42.305916] R13: 00007fff17fa2560 R14: 00007fff17fa2590 R15: 00007fff17fa28f0 [ 42.306712] [ 42.306906] [ 42.307029] Allocated by task 220: [ 42.307336] kasan_save_stack+0x22/0x50 [ 42.307646] kasan_set_track+0x25/0x30 [ 42.307937] __kasan_slab_alloc+0x59/0x70 [ 42.308314] kmem_cache_alloc+0x16b/0x370 [ 42.308634] vm_area_dup+0x20/0x160 [ 42.308916] __split_vma+0x170/0x950 [ 42.309274] split_vma+0xc6/0x110 [ 42.309573] mprotect_fixup+0x8d2/0xb30 [ 42.309890] do_mprotect_pkey+0x87e/0xd40 [ 42.310325] __x64_sys_mprotect+0x78/0xc0 [ 42.310664] do_syscall_64+0x3f/0x90 [ 42.310955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.311445] [ 42.311577] Freed by task 220: [ 42.311821] kasan_save_stack+0x22/0x50 [ 42.312134] kasan_set_track+0x25/0x30 [ 42.312529] kasan_save_free_info+0x2b/0x50 [ 42.312851] __kasan_slab_free+0x10a/0x190 [ 42.313193] kmem_cache_free+0x10d/0x4d0 [ 42.313558] rcu_core+0x8c8/0x2860 [ 42.313832] __do_softirq+0x1b7/0x7d4 [ 42.314117] [ 42.314329] Last potentially related work creation: [ 42.314773] kasan_save_stack+0x22/0x50 [ 42.315090] __kasan_record_aux_stack+0x8e/0xa0 [ 42.315551] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.315932] remove_vma+0x139/0x170 [ 42.316205] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.316587] do_vmi_munmap+0x1f1/0x2b0 [ 42.316873] __vm_munmap+0x138/0x3a0 [ 42.317157] __x64_sys_munmap+0x59/0x80 [ 42.317552] do_syscall_64+0x3f/0x90 [ 42.317842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.318315] [ 42.318448] The buggy address belongs to the object at ffff88800e1dee80 [ 42.318448] which belongs to the cache vm_area_struct of size 168 [ 42.319494] The buggy address is located 88 bytes inside of [ 42.319494] freed 168-byte region [ffff88800e1dee80, ffff88800e1def28) [ 42.320462] [ 42.320600] The buggy address belongs to the physical page: [ 42.320997] page:00000000428a2685 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1de [ 42.321746] memcg:ffff88800e843501 [ 42.322004] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.322438] page_type: 0xffffffff() [ 42.322782] raw: 0100000000000200 ffff88800879fc80 ffffea00003799c0 dead000000000006 [ 42.323418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e843501 [ 42.323968] page dumped because: kasan: bad access detected [ 42.324468] [ 42.324609] Memory state around the buggy address: [ 42.324964] ffff88800e1ded80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.325552] ffff88800e1dee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 42.326084] >ffff88800e1dee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.326788] ^ [ 42.327302] ffff88800e1def00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 42.327868] ffff88800e1def80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.328472] ================================================================== [ 42.338748] Disabling lock debugging due to kernel taint [ 44.887187] BUG: Bad rss-counter state mm:00000000fecba441 type:MM_FILEPAGES val:33 [ 44.887859] BUG: Bad rss-counter state mm:00000000fecba441 type:MM_ANONPAGES val:22 [ 45.496743] BUG: Bad rss-counter state mm:00000000025d2849 type:MM_FILEPAGES val:33 [ 45.497456] BUG: Bad rss-counter state mm:00000000025d2849 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6906' (ECDSA) to the list of known hosts. 2023/06/20 10:09:27 fuzzer started 2023/06/20 10:09:28 dialing manager at localhost:44161 2023/06/20 10:09:28 checking machine... 2023/06/20 10:09:28 checking revisions... 2023/06/20 10:09:28 testing simple program... [ 46.338630] kmemleak: Automatic memory scanning thread ended [ 46.395884] cgroup: Unknown subsys name 'net' [ 46.572753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:25 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800dc37798 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=0000000000000000 R15=0000000000002800 RIP=ffffffff8180f004 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 00007fd20e4c8900 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=00007f5123ae5000 CR3=000000000db98000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801664f8f0 RCX=0000000000000001 RDX=ffff88801664f908 RSI=ffff88801664f8f0 RDI=ffff88801664f868 RBP=dffffc0000000000 RSP=ffff88801664f7f8 R8 =0000000000000001 R9 =ffff88801664f898 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1002cc9f0d R13=ffffed1002cc9f0c R14=ffff88801664f8a0 R15=ffff88801664f858 RIP=ffffffff81130937 RFL=00000292 [--S-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 0000000000000000 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=00007f307bcd7328 CR3=0000000005482000 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