syzkaller login: [ 24.363106] BUG: Bad rss-counter state mm:000000003aabbd21 type:MM_FILEPAGES val:33 [ 24.364296] BUG: Bad rss-counter state mm:000000003aabbd21 type:MM_ANONPAGES val:22 [ 24.516573] ================================================================== [ 24.517657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.518863] Read of size 8 at addr ffff888016864310 by task sshd/219 [ 24.519807] [ 24.520036] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.520864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.521824] Call Trace: [ 24.522126] [ 24.522395] dump_stack_lvl+0x91/0xf0 [ 24.522857] print_report+0xcc/0x620 [ 24.523313] ? __virt_addr_valid+0x102/0x340 [ 24.523838] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.524436] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.525025] kasan_report+0xbe/0xf0 [ 24.525474] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.526066] vma_interval_tree_remove+0xc75/0xec0 [ 24.526637] vma_prepare+0xc54/0x11a0 [ 24.527090] __split_vma+0x5af/0x950 [ 24.527538] ? __pfx___split_vma+0x10/0x10 [ 24.528039] ? find_held_lock+0x2c/0x110 [ 24.528554] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.529090] ? lock_is_held_type+0x9f/0x120 [ 24.529595] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.530180] ? mtree_range_walk+0x632/0x900 [ 24.530697] ? mas_walk+0x5c7/0x7c0 [ 24.531152] do_vmi_munmap+0x1f1/0x2b0 [ 24.531621] mmap_region+0x1f9/0x2660 [ 24.532073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.532563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.533236] ? __pfx_lock_acquire+0x10/0x10 [ 24.533742] ? __pfx_mmap_region+0x10/0x10 [ 24.534253] ? security_mmap_addr+0x7d/0xa0 [ 24.534749] ? get_unmapped_area+0x1f5/0x3f0 [ 24.535269] do_mmap+0x854/0xf00 [ 24.535688] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.536173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.536712] ksys_mmap_pgoff+0x3af/0x500 [ 24.537188] do_syscall_64+0x3f/0x90 [ 24.537637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.538250] RIP: 0033:0x7f1fcd656d82 [ 24.538751] 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 [ 24.540815] RSP: 002b:00007ffefaada708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.541664] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1fcd656d82 [ 24.542461] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1fcca90000 [ 24.543252] RBP: 00007f1fcca90000 R08: 0000000000000009 R09: 0000000000001000 [ 24.544046] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0c2157ec0 [ 24.544846] R13: 00007ffefaada720 R14: 00007ffefaada750 R15: 00007ffefaadaab0 [ 24.545646] [ 24.545918] [ 24.546122] Allocated by task 212: [ 24.546526] kasan_save_stack+0x22/0x50 [ 24.546993] kasan_set_track+0x25/0x30 [ 24.547456] __kasan_slab_alloc+0x59/0x70 [ 24.547942] kmem_cache_alloc+0x16b/0x370 [ 24.548444] vm_area_dup+0x20/0x160 [ 24.548870] __split_vma+0x170/0x950 [ 24.549311] split_vma+0xc6/0x110 [ 24.549719] mprotect_fixup+0x8d2/0xb30 [ 24.550188] do_mprotect_pkey+0x87e/0xd40 [ 24.550676] __x64_sys_mprotect+0x78/0xc0 [ 24.551165] do_syscall_64+0x3f/0x90 [ 24.551607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.552203] [ 24.552413] Freed by task 212: [ 24.552785] kasan_save_stack+0x22/0x50 [ 24.553253] kasan_set_track+0x25/0x30 [ 24.553711] kasan_save_free_info+0x2b/0x50 [ 24.554210] __kasan_slab_free+0x10a/0x190 [ 24.554705] kmem_cache_free+0x10d/0x4d0 [ 24.555182] rcu_core+0x8c8/0x2860 [ 24.555604] __do_softirq+0x1b7/0x7d4 [ 24.556047] [ 24.556263] Last potentially related work creation: [ 24.556862] kasan_save_stack+0x22/0x50 [ 24.557329] __kasan_record_aux_stack+0x8e/0xa0 [ 24.557865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.558471] remove_vma+0x139/0x170 [ 24.558894] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.559418] do_vmi_munmap+0x1f1/0x2b0 [ 24.559873] __vm_munmap+0x138/0x3a0 [ 24.560343] __x64_sys_munmap+0x59/0x80 [ 24.560898] do_syscall_64+0x3f/0x90 [ 24.561342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.561939] [ 24.562139] The buggy address belongs to the object at ffff8880168642b8 [ 24.562139] which belongs to the cache vm_area_struct of size 168 [ 24.563514] The buggy address is located 88 bytes inside of [ 24.563514] freed 168-byte region [ffff8880168642b8, ffff888016864360) [ 24.564849] [ 24.565051] The buggy address belongs to the physical page: [ 24.565672] page:0000000023bc4fd7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16864 [ 24.566693] memcg:ffff88800da87001 [ 24.567095] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.567750] page_type: 0xffffffff() [ 24.568173] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 24.569054] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da87001 [ 24.569898] page dumped because: kasan: bad access detected [ 24.570513] [ 24.570717] Memory state around the buggy address: [ 24.571255] ffff888016864200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.572049] ffff888016864280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.572860] >ffff888016864300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.573658] ^ [ 24.574095] ffff888016864380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.574891] ffff888016864400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.575690] ================================================================== [ 24.576645] Disabling lock debugging due to kernel taint [ 26.769331] BUG: Bad rss-counter state mm:000000008c356529 type:MM_FILEPAGES val:33 [ 26.770093] BUG: Bad rss-counter state mm:000000008c356529 type:MM_ANONPAGES val:22 [ 27.219050] BUG: Bad rss-counter state mm:000000006c477295 type:MM_FILEPAGES val:33 [ 27.220123] BUG: Bad rss-counter state mm:000000006c477295 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39049' (ECDSA) to the list of known hosts. 2023/06/19 23:49:34 fuzzer started 2023/06/19 23:49:34 dialing manager at localhost:44161 2023/06/19 23:49:34 checking machine... 2023/06/19 23:49:34 checking revisions... [ 27.928728] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:49:34 testing simple program... [ 27.980358] cgroup: Unknown subsys name 'net' [ 28.054844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe62273a8f0 CR3=000000001424e000 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=2033333a39343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39343a3332203931 XMM08=00007fa390004b400000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=8000000000000025 RCX=0000000000000000 RDX=ffff88800fcc9b40 RSI=ffffffff8170b757 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff888010317798 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=800000001af81025 R13=00007f8ed19ff000 R14=ffff8880102b6ff0 R15=dffffc0000000000 RIP=ffffffff8170b757 RFL=00000293 [--S-A-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 00007f8ed1a3d900 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=00007f8ed1a02008 CR3=000000000e16e000 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