syzkaller login: [ 29.130120] BUG: Bad rss-counter state mm:00000000c0fe5cd4 type:MM_FILEPAGES val:33 [ 29.131934] BUG: Bad rss-counter state mm:00000000c0fe5cd4 type:MM_ANONPAGES val:22 [ 29.295697] ================================================================== [ 29.296784] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.297934] Read of size 8 at addr ffff88801997a058 by task sshd/219 [ 29.298943] [ 29.299219] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.300284] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.301506] Call Trace: [ 29.301892] [ 29.302239] dump_stack_lvl+0x91/0xf0 [ 29.302831] print_report+0xcc/0x620 [ 29.303421] ? __virt_addr_valid+0x102/0x340 [ 29.304107] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.304863] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.305636] kasan_report+0xbe/0xf0 [ 29.306214] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.306980] vma_interval_tree_remove+0xc75/0xec0 [ 29.307718] vma_prepare+0xc54/0x11a0 [ 29.308305] __split_vma+0x5af/0x950 [ 29.308886] ? __pfx___split_vma+0x10/0x10 [ 29.309538] ? find_held_lock+0x2c/0x110 [ 29.310172] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.310871] ? lock_is_held_type+0x9f/0x120 [ 29.311519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.312272] ? mtree_range_walk+0x632/0x900 [ 29.312947] ? mas_walk+0x5c7/0x7c0 [ 29.313532] do_vmi_munmap+0x1f1/0x2b0 [ 29.314139] mmap_region+0x1f9/0x2660 [ 29.314730] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.315345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.316227] ? __pfx_lock_acquire+0x10/0x10 [ 29.316880] ? __pfx_mmap_region+0x10/0x10 [ 29.317545] ? security_mmap_addr+0x7d/0xa0 [ 29.318198] ? get_unmapped_area+0x1f5/0x3f0 [ 29.318868] do_mmap+0x854/0xf00 [ 29.319403] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.320009] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.320696] ksys_mmap_pgoff+0x3af/0x500 [ 29.321322] do_syscall_64+0x3f/0x90 [ 29.321800] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.322413] RIP: 0033:0x7f809d599d82 [ 29.322845] 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 [ 29.324847] RSP: 002b:00007fff87804e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.325722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f809d599d82 [ 29.326527] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f809c9d3000 [ 29.327322] RBP: 00007f809c9d3000 R08: 0000000000000009 R09: 0000000000001000 [ 29.328117] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562807149ec0 [ 29.328920] R13: 00007fff87804e40 R14: 00007fff87804e70 R15: 00007fff878051d0 [ 29.329742] [ 29.330023] [ 29.330230] Allocated by task 212: [ 29.330638] kasan_save_stack+0x22/0x50 [ 29.331148] kasan_set_track+0x25/0x30 [ 29.331647] __kasan_slab_alloc+0x59/0x70 [ 29.332177] kmem_cache_alloc+0x16b/0x370 [ 29.332693] vm_area_dup+0x20/0x160 [ 29.333149] __split_vma+0x170/0x950 [ 29.333653] split_vma+0xc6/0x110 [ 29.334088] mprotect_fixup+0x8d2/0xb30 [ 29.334586] do_mprotect_pkey+0x87e/0xd40 [ 29.335116] __x64_sys_mprotect+0x78/0xc0 [ 29.335642] do_syscall_64+0x3f/0x90 [ 29.336119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.336753] [ 29.336969] Freed by task 212: [ 29.337364] kasan_save_stack+0x22/0x50 [ 29.337880] kasan_set_track+0x25/0x30 [ 29.338379] kasan_save_free_info+0x2b/0x50 [ 29.338915] __kasan_slab_free+0x10a/0x190 [ 29.339456] kmem_cache_free+0x10d/0x4d0 [ 29.339966] rcu_core+0x8c8/0x2860 [ 29.340416] __do_softirq+0x1b7/0x7d4 [ 29.340903] [ 29.341123] Last potentially related work creation: [ 29.341729] kasan_save_stack+0x22/0x50 [ 29.342225] __kasan_record_aux_stack+0x8e/0xa0 [ 29.342788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.343437] remove_vma+0x139/0x170 [ 29.343896] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.344448] do_vmi_munmap+0x1f1/0x2b0 [ 29.344932] __vm_munmap+0x138/0x3a0 [ 29.345418] __x64_sys_munmap+0x59/0x80 [ 29.345921] do_syscall_64+0x3f/0x90 [ 29.346393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.347036] [ 29.347249] The buggy address belongs to the object at ffff88801997a000 [ 29.347249] which belongs to the cache vm_area_struct of size 168 [ 29.348735] The buggy address is located 88 bytes inside of [ 29.348735] freed 168-byte region [ffff88801997a000, ffff88801997a0a8) [ 29.350159] [ 29.350377] The buggy address belongs to the physical page: [ 29.351046] page:0000000059285c46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1997a [ 29.352158] memcg:ffff88800eaeea01 [ 29.352589] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.353237] page_type: 0xffffffff() [ 29.353715] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.354646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eaeea01 [ 29.355563] page dumped because: kasan: bad access detected [ 29.356231] [ 29.356449] Memory state around the buggy address: [ 29.357052] ffff888019979f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 29.357921] ffff888019979f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.358780] >ffff88801997a000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.359632] ^ [ 29.360362] ffff88801997a080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.361222] ffff88801997a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.362084] ================================================================== [ 29.363174] Disabling lock debugging due to kernel taint [ 31.259864] BUG: Bad rss-counter state mm:00000000f0dd2144 type:MM_FILEPAGES val:33 [ 31.260861] BUG: Bad rss-counter state mm:00000000f0dd2144 type:MM_ANONPAGES val:22 [ 31.831954] BUG: Bad rss-counter state mm:0000000060faa501 type:MM_FILEPAGES val:33 [ 31.832962] BUG: Bad rss-counter state mm:0000000060faa501 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18890' (ECDSA) to the list of known hosts. 2023/06/21 00:27:26 fuzzer started 2023/06/21 00:27:26 dialing manager at localhost:36067 2023/06/21 00:27:26 checking machine... 2023/06/21 00:27:26 checking revisions... [ 32.472620] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:27:27 testing simple program... [ 32.515434] cgroup: Unknown subsys name 'net' [ 32.557626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:27:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000081 RCX=ffffffff81f172c1 RDX=ffff8880169351c0 RSI=0000000000000000 RDI=0000000000000003 RBP=ffff88800895efa8 RSP=ffff88801814f8d8 R8 =0000000000000003 R9 =0000000000004000 R10=0000000000004000 R11=0000000000000001 R12=0000000000004000 R13=0000000000000001 R14=1ffff11003029f1e R15=0000000000000000 RIP=ffffffff814c0860 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 00007f7d0e9ff900 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=00007fffccd79000 CR3=0000000010198000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd4b4846000 CR3=000000000f490000 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=e652c605c9ce87a7524e6f5a4f93752c XMM02=2c67c8bc2e329bc3000000000011d4c8 XMM03=fb795ef6d65770560000000000121960 XMM04=c833af1b332781a000000000000ae988 XMM05=19e9129bd510f2350000000000131b10 XMM06=4fda316b135da52b0000000000131998 XMM07=e042d86d42eb936e0000000000121be0 XMM08=17e5457b6b00af88000000000011d528 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000