syzkaller login: [ 35.602027] BUG: Bad rss-counter state mm:00000000983c4c86 type:MM_FILEPAGES val:33 [ 35.603482] BUG: Bad rss-counter state mm:00000000983c4c86 type:MM_ANONPAGES val:22 [ 35.771701] ================================================================== [ 35.772616] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.773567] Read of size 8 at addr ffff888016129228 by task sshd/226 [ 35.774419] [ 35.774635] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.775491] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.776621] Call Trace: [ 35.776942] [ 35.777227] dump_stack_lvl+0x91/0xf0 [ 35.777718] print_report+0xcc/0x620 [ 35.778195] ? __virt_addr_valid+0x102/0x340 [ 35.778738] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.779352] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.779971] kasan_report+0xbe/0xf0 [ 35.780448] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.781068] vma_interval_tree_remove+0xc75/0xec0 [ 35.781667] vma_prepare+0xc54/0x11a0 [ 35.782142] __split_vma+0x5af/0x950 [ 35.782614] ? __pfx___split_vma+0x10/0x10 [ 35.783143] ? find_held_lock+0x2c/0x110 [ 35.783662] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.784228] ? lock_is_held_type+0x9f/0x120 [ 35.784769] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.785379] ? mtree_range_walk+0x632/0x900 [ 35.785927] ? mas_walk+0x5c7/0x7c0 [ 35.786401] do_vmi_munmap+0x1f1/0x2b0 [ 35.786893] mmap_region+0x1f9/0x2660 [ 35.787376] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.787888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.788620] ? __pfx_lock_acquire+0x10/0x10 [ 35.789155] ? __pfx_mmap_region+0x10/0x10 [ 35.789684] ? security_mmap_addr+0x7d/0xa0 [ 35.790210] ? get_unmapped_area+0x1f5/0x3f0 [ 35.790762] do_mmap+0x854/0xf00 [ 35.791205] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.791697] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.792267] ksys_mmap_pgoff+0x3af/0x500 [ 35.792774] do_syscall_64+0x3f/0x90 [ 35.793250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.793896] RIP: 0033:0x7fe629628d82 [ 35.794353] 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 [ 35.796494] RSP: 002b:00007ffc2c765c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.797396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe629628d82 [ 35.798245] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe628a62000 [ 35.799090] RBP: 00007fe628a62000 R08: 0000000000000009 R09: 0000000000001000 [ 35.799951] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c50ae97d90 [ 35.800789] R13: 00007ffc2c765ca0 R14: 00007ffc2c765cd0 R15: 00007ffc2c766030 [ 35.801648] [ 35.801942] [ 35.802159] Allocated by task 219: [ 35.802589] kasan_save_stack+0x22/0x50 [ 35.803098] kasan_set_track+0x25/0x30 [ 35.803588] __kasan_slab_alloc+0x59/0x70 [ 35.804115] kmem_cache_alloc+0x16b/0x370 [ 35.804626] vm_area_dup+0x20/0x160 [ 35.805087] __split_vma+0x170/0x950 [ 35.805554] split_vma+0xc6/0x110 [ 35.805995] mprotect_fixup+0x8d2/0xb30 [ 35.806496] do_mprotect_pkey+0x87e/0xd40 [ 35.807015] __x64_sys_mprotect+0x78/0xc0 [ 35.807533] do_syscall_64+0x3f/0x90 [ 35.808019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.808657] [ 35.808874] Freed by task 204: [ 35.809264] kasan_save_stack+0x22/0x50 [ 35.809771] kasan_set_track+0x25/0x30 [ 35.810261] kasan_save_free_info+0x2b/0x50 [ 35.810793] __kasan_slab_free+0x10a/0x190 [ 35.811320] kmem_cache_free+0x10d/0x4d0 [ 35.811831] rcu_core+0x8c8/0x2860 [ 35.812285] __do_softirq+0x1b7/0x7d4 [ 35.812759] [ 35.812976] Last potentially related work creation: [ 35.813564] kasan_save_stack+0x22/0x50 [ 35.814065] __kasan_record_aux_stack+0x8e/0xa0 [ 35.814642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.815284] remove_vma+0x139/0x170 [ 35.815734] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.816319] do_vmi_munmap+0x1f1/0x2b0 [ 35.816811] __vm_munmap+0x138/0x3a0 [ 35.817278] __x64_sys_munmap+0x59/0x80 [ 35.817778] do_syscall_64+0x3f/0x90 [ 35.818256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.818895] [ 35.819117] The buggy address belongs to the object at ffff8880161291d0 [ 35.819117] which belongs to the cache vm_area_struct of size 168 [ 35.820596] The buggy address is located 88 bytes inside of [ 35.820596] freed 168-byte region [ffff8880161291d0, ffff888016129278) [ 35.821999] [ 35.822214] The buggy address belongs to the physical page: [ 35.822874] page:0000000007b3d392 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16129 [ 35.823982] memcg:ffff88800e7dff01 [ 35.824409] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.825082] page_type: 0xffffffff() [ 35.825554] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.826508] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7dff01 [ 35.827451] page dumped because: kasan: bad access detected [ 35.828149] [ 35.828367] Memory state around the buggy address: [ 35.828973] ffff888016129100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.829878] ffff888016129180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.830775] >ffff888016129200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.831651] ^ [ 35.832256] ffff888016129280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.833156] ffff888016129300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.834031] ================================================================== [ 35.835217] Disabling lock debugging due to kernel taint [ 38.535353] BUG: Bad rss-counter state mm:0000000049d8f454 type:MM_FILEPAGES val:33 [ 38.536425] BUG: Bad rss-counter state mm:0000000049d8f454 type:MM_ANONPAGES val:22 [ 39.021623] BUG: Bad rss-counter state mm:000000003c9a0ca8 type:MM_FILEPAGES val:33 [ 39.022799] BUG: Bad rss-counter state mm:000000003c9a0ca8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34566' (ECDSA) to the list of known hosts. 2023/06/20 04:33:33 fuzzer started 2023/06/20 04:33:34 dialing manager at localhost:44161 2023/06/20 04:33:34 checking machine... 2023/06/20 04:33:34 checking revisions... [ 39.717749] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:33:34 testing simple program... [ 39.775101] cgroup: Unknown subsys name 'net' [ 39.821099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:33 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=1ffffffff0ba7a02 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110011aff7c RSP=ffff888008d7fbd0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88806ce361a0 R13=ffffffff81839a5a R14=00000000fffffab8 R15=0000000000000000 RIP=ffffffff812d86c0 RFL=00000012 [----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 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=00007fc6abdef2c0 CR3=0000000009a8a000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4ca9ff49a666ee0300000000000ae988 XMM05=815f7a830bcea3e90000000000135110 XMM06=13e856d8d71426c80000000000133e40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000020000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e57978 RCX=ffffffff861375e0 RDX=1ffff110011caf2f RSI=ffff888008e57d08 RDI=ffff888008e57978 RBP=ffff888008e57d08 RSP=ffff888008e578d0 R8 =ffffffff861375e4 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff888008e579c0 R14=ffff888008e57d10 R15=ffff888008e57978 RIP=ffffffff81130416 RFL=00000282 [--S----] 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=00007ffcf892d000 CR3=000000000f3ee000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000