syzkaller login: [ 32.292536] BUG: Bad rss-counter state mm:00000000ef2ec335 type:MM_FILEPAGES val:33 [ 32.293751] BUG: Bad rss-counter state mm:00000000ef2ec335 type:MM_ANONPAGES val:22 [ 32.330960] ================================================================== [ 32.331581] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.332217] Read of size 8 at addr ffff888019287798 by task sshd/220 [ 32.332726] [ 32.332873] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.333550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.334253] Call Trace: [ 32.334467] [ 32.334660] dump_stack_lvl+0x91/0xf0 [ 32.334993] print_report+0xcc/0x620 [ 32.335317] ? __virt_addr_valid+0x102/0x340 [ 32.335700] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.336122] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.336534] kasan_report+0xbe/0xf0 [ 32.336859] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.337281] vma_interval_tree_remove+0xc75/0xec0 [ 32.337708] vma_prepare+0xc54/0x11a0 [ 32.338038] __split_vma+0x5af/0x950 [ 32.338360] ? __pfx___split_vma+0x10/0x10 [ 32.338719] ? find_held_lock+0x2c/0x110 [ 32.339077] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.339458] ? lock_is_held_type+0x9f/0x120 [ 32.339825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.340240] ? mtree_range_walk+0x632/0x900 [ 32.340621] ? mas_walk+0x5c7/0x7c0 [ 32.340943] do_vmi_munmap+0x1f1/0x2b0 [ 32.341280] mmap_region+0x1f9/0x2660 [ 32.341620] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.341970] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.342452] ? __pfx_lock_acquire+0x10/0x10 [ 32.342815] ? __pfx_mmap_region+0x10/0x10 [ 32.343183] ? security_mmap_addr+0x7d/0xa0 [ 32.343540] ? get_unmapped_area+0x1f5/0x3f0 [ 32.343912] do_mmap+0x854/0xf00 [ 32.344207] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.344541] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.344921] ksys_mmap_pgoff+0x3af/0x500 [ 32.345267] do_syscall_64+0x3f/0x90 [ 32.345606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.346045] RIP: 0033:0x7fd354169d82 [ 32.346357] 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 [ 32.347778] RSP: 002b:00007ffe6452c328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.348393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd354169d82 [ 32.348965] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd3535a3000 [ 32.349531] RBP: 00007fd3535a3000 R08: 0000000000000009 R09: 0000000000001000 [ 32.350109] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562223caaec0 [ 32.350679] R13: 00007ffe6452c340 R14: 00007ffe6452c370 R15: 00007ffe6452c6d0 [ 32.351257] [ 32.351456] [ 32.351602] Allocated by task 213: [ 32.351896] kasan_save_stack+0x22/0x50 [ 32.352236] kasan_set_track+0x25/0x30 [ 32.352564] __kasan_slab_alloc+0x59/0x70 [ 32.352916] kmem_cache_alloc+0x16b/0x370 [ 32.353264] vm_area_dup+0x20/0x160 [ 32.353580] __split_vma+0x170/0x950 [ 32.353901] split_vma+0xc6/0x110 [ 32.354199] mprotect_fixup+0x8d2/0xb30 [ 32.354538] do_mprotect_pkey+0x87e/0xd40 [ 32.354885] __x64_sys_mprotect+0x78/0xc0 [ 32.355232] do_syscall_64+0x3f/0x90 [ 32.355548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.355975] [ 32.356119] Freed by task 213: [ 32.356381] kasan_save_stack+0x22/0x50 [ 32.356716] kasan_set_track+0x25/0x30 [ 32.357051] kasan_save_free_info+0x2b/0x50 [ 32.357412] __kasan_slab_free+0x10a/0x190 [ 32.357779] kmem_cache_free+0x10d/0x4d0 [ 32.358117] rcu_core+0x8c8/0x2860 [ 32.358418] __do_softirq+0x1b7/0x7d4 [ 32.358738] [ 32.358883] Last potentially related work creation: [ 32.359275] kasan_save_stack+0x22/0x50 [ 32.359615] __kasan_record_aux_stack+0x8e/0xa0 [ 32.359996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.360427] remove_vma+0x139/0x170 [ 32.360729] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.361100] do_vmi_munmap+0x1f1/0x2b0 [ 32.361424] __vm_munmap+0x138/0x3a0 [ 32.361740] __x64_sys_munmap+0x59/0x80 [ 32.362071] do_syscall_64+0x3f/0x90 [ 32.362385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.362808] [ 32.362953] The buggy address belongs to the object at ffff888019287740 [ 32.362953] which belongs to the cache vm_area_struct of size 168 [ 32.363926] The buggy address is located 88 bytes inside of [ 32.363926] freed 168-byte region [ffff888019287740, ffff8880192877e8) [ 32.364859] [ 32.365010] The buggy address belongs to the physical page: [ 32.365444] page:00000000ef33e67a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19287 [ 32.366178] memcg:ffff888016a59701 [ 32.366461] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.366888] page_type: 0xffffffff() [ 32.367185] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.367795] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a59701 [ 32.368402] page dumped because: kasan: bad access detected [ 32.368836] [ 32.368979] Memory state around the buggy address: [ 32.369361] ffff888019287680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.369866] ffff888019287700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.370314] >ffff888019287780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.370759] ^ [ 32.371017] ffff888019287800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.371464] ffff888019287880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.371908] ================================================================== [ 32.372530] Disabling lock debugging due to kernel taint [ 34.930065] BUG: Bad rss-counter state mm:0000000004edae37 type:MM_FILEPAGES val:33 [ 34.931249] BUG: Bad rss-counter state mm:0000000004edae37 type:MM_ANONPAGES val:22 [ 35.302276] BUG: Bad rss-counter state mm:000000000b213234 type:MM_FILEPAGES val:33 [ 35.303222] BUG: Bad rss-counter state mm:000000000b213234 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33718' (ECDSA) to the list of known hosts. 2023/06/20 04:05:11 fuzzer started 2023/06/20 04:05:11 dialing manager at localhost:44161 2023/06/20 04:05:11 checking machine... 2023/06/20 04:05:11 checking revisions... [ 36.032312] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:05:11 testing simple program... [ 36.078555] cgroup: Unknown subsys name 'net' [ 36.117774] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:09 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801c9d6400 RCX=ffffffff8449bb5a RDX=ffff88800d8dd1c0 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c83cc26 RSP=ffff88800f1e7a90 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800c83cc00 R13=ffff88800f1e7e88 R14=0000000000000002 R15=ffff88800f1e7e70 RIP=ffffffff814c07e4 RFL=00000202 [-------] 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 00007f2a9c72e900 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=00007f2a9c70d020 CR3=000000000eb2e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f21e9837840 CR3=000000000ee2c000 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=2030313a35303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a35303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000