syzkaller login: [ 28.694201] BUG: Bad rss-counter state mm:00000000afb21959 type:MM_FILEPAGES val:33 [ 28.696206] BUG: Bad rss-counter state mm:00000000afb21959 type:MM_ANONPAGES val:22 [ 28.899438] ================================================================== [ 28.900506] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.901462] Read of size 8 at addr ffff8880166e7df0 by task sshd/221 [ 28.902335] [ 28.902554] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.903435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904440] Call Trace: [ 28.904765] [ 28.905054] dump_stack_lvl+0x91/0xf0 [ 28.905546] print_report+0xcc/0x620 [ 28.906031] ? __virt_addr_valid+0x102/0x340 [ 28.906584] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907211] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907864] kasan_report+0xbe/0xf0 [ 28.908345] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908981] vma_interval_tree_remove+0xc75/0xec0 [ 28.909588] vma_prepare+0xc54/0x11a0 [ 28.910073] __split_vma+0x5af/0x950 [ 28.910546] ? __pfx___split_vma+0x10/0x10 [ 28.911072] ? find_held_lock+0x2c/0x110 [ 28.911606] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.912173] ? lock_is_held_type+0x9f/0x120 [ 28.912716] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913322] ? mtree_range_walk+0x632/0x900 [ 28.913882] ? mas_walk+0x5c7/0x7c0 [ 28.914357] do_vmi_munmap+0x1f1/0x2b0 [ 28.914849] mmap_region+0x1f9/0x2660 [ 28.915330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.915866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.916577] ? __pfx_lock_acquire+0x10/0x10 [ 28.917110] ? __pfx_mmap_region+0x10/0x10 [ 28.917639] ? security_mmap_addr+0x7d/0xa0 [ 28.918174] ? get_unmapped_area+0x1f5/0x3f0 [ 28.918724] do_mmap+0x854/0xf00 [ 28.919165] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.919679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.920247] ksys_mmap_pgoff+0x3af/0x500 [ 28.920756] do_syscall_64+0x3f/0x90 [ 28.921239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.921896] RIP: 0033:0x7f96713c4d82 [ 28.922354] 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 [ 28.924475] RSP: 002b:00007ffddb2396e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.925376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96713c4d82 [ 28.926247] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96707fe000 [ 28.927111] RBP: 00007f96707fe000 R08: 0000000000000009 R09: 0000000000001000 [ 28.927983] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b6c212eb20 [ 28.928828] R13: 00007ffddb239700 R14: 00007ffddb239730 R15: 00007ffddb239a90 [ 28.929701] [ 28.930000] [ 28.930216] Allocated by task 212: [ 28.930651] kasan_save_stack+0x22/0x50 [ 28.931166] kasan_set_track+0x25/0x30 [ 28.931673] __kasan_slab_alloc+0x59/0x70 [ 28.932193] kmem_cache_alloc+0x16b/0x370 [ 28.932712] vm_area_dup+0x20/0x160 [ 28.933170] __split_vma+0x170/0x950 [ 28.933637] split_vma+0xc6/0x110 [ 28.934086] mprotect_fixup+0x8d2/0xb30 [ 28.934591] do_mprotect_pkey+0x87e/0xd40 [ 28.935122] __x64_sys_mprotect+0x78/0xc0 [ 28.935656] do_syscall_64+0x3f/0x90 [ 28.936135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.936776] [ 28.936989] Freed by task 212: [ 28.937385] kasan_save_stack+0x22/0x50 [ 28.937887] kasan_set_track+0x25/0x30 [ 28.938383] kasan_save_free_info+0x2b/0x50 [ 28.938914] __kasan_slab_free+0x10a/0x190 [ 28.939464] kmem_cache_free+0x10d/0x4d0 [ 28.939983] rcu_core+0x8c8/0x2860 [ 28.940428] __do_softirq+0x1b7/0x7d4 [ 28.940902] [ 28.941115] Last potentially related work creation: [ 28.941700] kasan_save_stack+0x22/0x50 [ 28.942202] __kasan_record_aux_stack+0x8e/0xa0 [ 28.942868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.943527] remove_vma+0x139/0x170 [ 28.943982] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.944538] do_vmi_munmap+0x1f1/0x2b0 [ 28.945039] __vm_munmap+0x138/0x3a0 [ 28.945509] __x64_sys_munmap+0x59/0x80 [ 28.946003] do_syscall_64+0x3f/0x90 [ 28.946476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947114] [ 28.947336] The buggy address belongs to the object at ffff8880166e7d98 [ 28.947336] which belongs to the cache vm_area_struct of size 168 [ 28.948804] The buggy address is located 88 bytes inside of [ 28.948804] freed 168-byte region [ffff8880166e7d98, ffff8880166e7e40) [ 28.950200] [ 28.950418] The buggy address belongs to the physical page: [ 28.951078] page:000000001783e024 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x166e7 [ 28.952169] memcg:ffff88800e3d5101 [ 28.952597] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.953293] page_type: 0xffffffff() [ 28.953749] raw: 0100000000000200 ffff8880087a0c80 ffffea00003fef80 dead000000000007 [ 28.954668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3d5101 [ 28.955579] page dumped because: kasan: bad access detected [ 28.956239] [ 28.956456] Memory state around the buggy address: [ 28.957038] ffff8880166e7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.957886] ffff8880166e7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.958745] >ffff8880166e7d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.959602] ^ [ 28.960417] ffff8880166e7e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.961279] ffff8880166e7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.962117] ================================================================== [ 28.963079] Disabling lock debugging due to kernel taint [ 31.629621] BUG: Bad rss-counter state mm:0000000080e8b729 type:MM_FILEPAGES val:33 [ 31.631012] BUG: Bad rss-counter state mm:0000000080e8b729 type:MM_ANONPAGES val:22 [ 32.019598] BUG: Bad rss-counter state mm:00000000276ab171 type:MM_FILEPAGES val:33 [ 32.020579] BUG: Bad rss-counter state mm:00000000276ab171 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28924' (ECDSA) to the list of known hosts. 2023/06/20 12:19:21 fuzzer started 2023/06/20 12:19:21 dialing manager at localhost:36067 2023/06/20 12:19:21 checking machine... 2023/06/20 12:19:21 checking revisions... [ 32.730043] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:19:21 testing simple program... [ 32.780789] cgroup: Unknown subsys name 'net' [ 32.832400] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:19:20 Registers: info registers vcpu 0 RAX=0000561483b87000 RBX=0000561483b87c50 RCX=ffffffff81402571 RDX=ffff8880146d3680 RSI=0000561483b87c50 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff888016b07bc8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000c50 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff814c0438 RFL=00000206 [-----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 00007f794ffff700 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=00007f9aad5f7020 CR3=000000000aaee000 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=2030323a39313a3231203032206e754a XMM01=5f687373203a726f727265203a5d3733 XMM02=632079746972756365732078756e694c XMM03=742064656c696146203a656d616e7962 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39313a3231203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000008 RCX=ffffffff844a504f RDX=0000000000000008 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88800fbefa08 RSP=ffff88800ed0fce0 R8 =0000000000000000 R9 =0000000000000001 R10=0000000000000008 R11=0000000000000000 R12=0000000000000001 R13=0000000000000008 R14=00005611687b8f40 R15=0000561168420fff RIP=ffffffff814c0250 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faff267f900 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=00005611687b8f40 CR3=000000001caa8000 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