syzkaller login: [ 31.097924] BUG: Bad rss-counter state mm:00000000019eabdd type:MM_FILEPAGES val:33 [ 31.099573] BUG: Bad rss-counter state mm:00000000019eabdd type:MM_ANONPAGES val:22 [ 31.262087] ================================================================== [ 31.263046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264006] Read of size 8 at addr ffff88800dba1a50 by task sshd/220 [ 31.264817] [ 31.265047] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.266052] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.267071] Call Trace: [ 31.267438] <TASK> [ 31.267737] dump_stack_lvl+0x91/0xf0 [ 31.268236] print_report+0xcc/0x620 [ 31.268733] ? __virt_addr_valid+0x102/0x340 [ 31.269314] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.269948] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270589] kasan_report+0xbe/0xf0 [ 31.271084] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271726] vma_interval_tree_remove+0xc75/0xec0 [ 31.272361] vma_prepare+0xc54/0x11a0 [ 31.272880] __split_vma+0x5af/0x950 [ 31.273367] ? __pfx___split_vma+0x10/0x10 [ 31.273935] ? find_held_lock+0x2c/0x110 [ 31.274471] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.275060] ? lock_is_held_type+0x9f/0x120 [ 31.275623] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.276247] ? mtree_range_walk+0x632/0x900 [ 31.276839] ? mas_walk+0x5c7/0x7c0 [ 31.277326] do_vmi_munmap+0x1f1/0x2b0 [ 31.277840] mmap_region+0x1f9/0x2660 [ 31.278345] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.278883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279618] ? __pfx_lock_acquire+0x10/0x10 [ 31.280181] ? __pfx_mmap_region+0x10/0x10 [ 31.280737] ? security_mmap_addr+0x7d/0xa0 [ 31.281308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.281893] do_mmap+0x854/0xf00 [ 31.282352] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.283469] ksys_mmap_pgoff+0x3af/0x500 [ 31.284005] do_syscall_64+0x3f/0x90 [ 31.284500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285185] RIP: 0033:0x7f9afe447d82 [ 31.285659] 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 [ 31.287924] RSP: 002b:00007ffdf0bae908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.288902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9afe447d82 [ 31.289803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9afd881000 [ 31.290700] RBP: 00007f9afd881000 R08: 0000000000000009 R09: 0000000000001000 [ 31.291587] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b386417ec0 [ 31.292470] R13: 00007ffdf0bae920 R14: 00007ffdf0bae950 R15: 00007ffdf0baecb0 [ 31.293393] </TASK> [ 31.293697] [ 31.293921] Allocated by task 213: [ 31.294367] kasan_save_stack+0x22/0x50 [ 31.294894] kasan_set_track+0x25/0x30 [ 31.295411] __kasan_slab_alloc+0x59/0x70 [ 31.295969] kmem_cache_alloc+0x16b/0x370 [ 31.296502] vm_area_dup+0x20/0x160 [ 31.296989] __split_vma+0x170/0x950 [ 31.297480] split_vma+0xc6/0x110 [ 31.297941] mprotect_fixup+0x8d2/0xb30 [ 31.298459] do_mprotect_pkey+0x87e/0xd40 [ 31.299009] __x64_sys_mprotect+0x78/0xc0 [ 31.299549] do_syscall_64+0x3f/0x90 [ 31.300034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.300710] [ 31.300951] Freed by task 203: [ 31.301363] kasan_save_stack+0x22/0x50 [ 31.301896] kasan_set_track+0x25/0x30 [ 31.302416] kasan_save_free_info+0x2b/0x50 [ 31.302976] __kasan_slab_free+0x10a/0x190 [ 31.303534] kmem_cache_free+0x10d/0x4d0 [ 31.304062] rcu_core+0x8c8/0x2860 [ 31.304520] __do_softirq+0x1b7/0x7d4 [ 31.305028] [ 31.305249] Last potentially related work creation: [ 31.305866] kasan_save_stack+0x22/0x50 [ 31.306398] __kasan_record_aux_stack+0x8e/0xa0 [ 31.306995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.307673] remove_vma+0x139/0x170 [ 31.308141] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.308727] do_vmi_munmap+0x1f1/0x2b0 [ 31.309250] __vm_munmap+0x138/0x3a0 [ 31.309745] __x64_sys_munmap+0x59/0x80 [ 31.310266] do_syscall_64+0x3f/0x90 [ 31.310768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311444] [ 31.311670] The buggy address belongs to the object at ffff88800dba19f8 [ 31.311670] which belongs to the cache vm_area_struct of size 168 [ 31.313224] The buggy address is located 88 bytes inside of [ 31.313224] freed 168-byte region [ffff88800dba19f8, ffff88800dba1aa0) [ 31.314723] [ 31.314952] The buggy address belongs to the physical page: [ 31.315647] page:00000000fe5ca620 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdba1 [ 31.316819] memcg:ffff88800dad3c01 [ 31.317265] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.317951] page_type: 0xffffffff() [ 31.318427] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.319393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dad3c01 [ 31.320353] page dumped because: kasan: bad access detected [ 31.321041] [ 31.321252] Memory state around the buggy address: [ 31.321826] ffff88800dba1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.322687] ffff88800dba1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.323533] >ffff88800dba1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.324399] ^ [ 31.325111] ffff88800dba1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.325963] ffff88800dba1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326824] ================================================================== [ 31.327875] Disabling lock debugging due to kernel taint [ 33.947382] BUG: Bad rss-counter state mm:0000000091bab414 type:MM_FILEPAGES val:33 [ 33.948400] BUG: Bad rss-counter state mm:0000000091bab414 type:MM_ANONPAGES val:22 [ 34.462891] BUG: Bad rss-counter state mm:00000000c3f09621 type:MM_FILEPAGES val:33 [ 34.463890] BUG: Bad rss-counter state mm:00000000c3f09621 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30759' (ECDSA) to the list of known hosts. 2023/06/19 13:46:32 fuzzer started 2023/06/19 13:46:32 dialing manager at localhost:44161 2023/06/19 13:46:32 checking machine... 2023/06/19 13:46:32 checking revisions... [ 35.185722] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:46:33 testing simple program... [ 35.230537] cgroup: Unknown subsys name 'net' [ 35.281533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:46:31 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000d4 RCX=00007f8a4fa8a7b2 RDX=0000000000000000 RSI=0000000000000080 RDI=000055e80fb7be90 RBP=000055e80fb7be68 RSP=00007f8a4ec49ac0 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000000 R11=0000000000000282 R12=0000000000000000 R13=000055e80fb7bc50 R14=000055e80fb7be90 R15=00007f8a4ec49af0 RIP=00007f8a4fa8a7b8 RFL=00000207 [-----PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8a4ec4a700 00000000 00000000 GS =0000 0000000000000000 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=00007f58620089f0 CR3=0000000015870000 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=2032333a36343a3331203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a36343a3331203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f506242f618 CR3=0000000015870000 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=36343a3331203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303736 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000