syzkaller login: [ 62.473371] BUG: Bad rss-counter state mm:00000000f727bf91 type:MM_FILEPAGES val:33 [ 62.474813] BUG: Bad rss-counter state mm:00000000f727bf91 type:MM_ANONPAGES val:22 [ 62.624108] ================================================================== [ 62.625028] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.626007] Read of size 8 at addr ffff888016a57a50 by task sshd/220 [ 62.626781] [ 62.627005] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.627975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.628952] Call Trace: [ 62.629317] [ 62.629606] dump_stack_lvl+0x91/0xf0 [ 62.630097] print_report+0xcc/0x620 [ 62.630581] ? __virt_addr_valid+0x102/0x340 [ 62.631134] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.631754] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.632379] kasan_report+0xbe/0xf0 [ 62.632856] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.633489] vma_interval_tree_remove+0xc75/0xec0 [ 62.634083] vma_prepare+0xc54/0x11a0 [ 62.634571] __split_vma+0x5af/0x950 [ 62.635041] ? __pfx___split_vma+0x10/0x10 [ 62.635565] ? find_held_lock+0x2c/0x110 [ 62.636081] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.636641] ? lock_is_held_type+0x9f/0x120 [ 62.637197] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.637807] ? mtree_range_walk+0x632/0x900 [ 62.638352] ? mas_walk+0x5c7/0x7c0 [ 62.638823] do_vmi_munmap+0x1f1/0x2b0 [ 62.639310] mmap_region+0x1f9/0x2660 [ 62.639787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.640293] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.641002] ? __pfx_lock_acquire+0x10/0x10 [ 62.641543] ? __pfx_mmap_region+0x10/0x10 [ 62.642076] ? security_mmap_addr+0x7d/0xa0 [ 62.642604] ? get_unmapped_area+0x1f5/0x3f0 [ 62.643149] do_mmap+0x854/0xf00 [ 62.643587] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.644084] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.644642] ksys_mmap_pgoff+0x3af/0x500 [ 62.645152] do_syscall_64+0x3f/0x90 [ 62.645627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.646270] RIP: 0033:0x7f4dcb80dd82 [ 62.646721] 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 [ 62.648840] RSP: 002b:00007ffc2d254c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.649767] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dcb80dd82 [ 62.650620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dcac47000 [ 62.651458] RBP: 00007f4dcac47000 R08: 0000000000000009 R09: 0000000000001000 [ 62.652299] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d2c7d2ec0 [ 62.653153] R13: 00007ffc2d254c20 R14: 00007ffc2d254c50 R15: 00007ffc2d254fb0 [ 62.654006] [ 62.654297] [ 62.654511] Allocated by task 213: [ 62.654946] kasan_save_stack+0x22/0x50 [ 62.655449] kasan_set_track+0x25/0x30 [ 62.655939] __kasan_slab_alloc+0x59/0x70 [ 62.656463] kmem_cache_alloc+0x16b/0x370 [ 62.656979] vm_area_dup+0x20/0x160 [ 62.657451] __split_vma+0x170/0x950 [ 62.657912] split_vma+0xc6/0x110 [ 62.658348] mprotect_fixup+0x8d2/0xb30 [ 62.658848] do_mprotect_pkey+0x87e/0xd40 [ 62.659370] __x64_sys_mprotect+0x78/0xc0 [ 62.659889] do_syscall_64+0x3f/0x90 [ 62.660358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.660991] [ 62.661222] Freed by task 13: [ 62.661610] kasan_save_stack+0x22/0x50 [ 62.662106] kasan_set_track+0x25/0x30 [ 62.662594] kasan_save_free_info+0x2b/0x50 [ 62.663123] __kasan_slab_free+0x10a/0x190 [ 62.663664] kmem_cache_free+0x10d/0x4d0 [ 62.664168] rcu_core+0x8c8/0x2860 [ 62.664610] __do_softirq+0x1b7/0x7d4 [ 62.665078] [ 62.665301] Last potentially related work creation: [ 62.665889] kasan_save_stack+0x22/0x50 [ 62.666392] __kasan_record_aux_stack+0x8e/0xa0 [ 62.666974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.667608] remove_vma+0x139/0x170 [ 62.668059] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.668614] do_vmi_munmap+0x1f1/0x2b0 [ 62.669097] __vm_munmap+0x138/0x3a0 [ 62.669583] __x64_sys_munmap+0x59/0x80 [ 62.670073] do_syscall_64+0x3f/0x90 [ 62.670541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.671180] [ 62.671398] The buggy address belongs to the object at ffff888016a579f8 [ 62.671398] which belongs to the cache vm_area_struct of size 168 [ 62.672872] The buggy address is located 88 bytes inside of [ 62.672872] freed 168-byte region [ffff888016a579f8, ffff888016a57aa0) [ 62.674281] [ 62.674495] The buggy address belongs to the physical page: [ 62.675144] page:000000009f0eb9aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a57 [ 62.676247] memcg:ffff88800f0b8f01 [ 62.676674] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.677321] page_type: 0xffffffff() [ 62.677771] raw: 0100000000000200 ffff88800879fc80 ffffea00003c28c0 dead000000000002 [ 62.678683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0b8f01 [ 62.679631] page dumped because: kasan: bad access detected [ 62.680338] [ 62.680559] Memory state around the buggy address: [ 62.681151] ffff888016a57900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.682026] ffff888016a57980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 62.682888] >ffff888016a57a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.683737] ^ [ 62.684429] ffff888016a57a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 62.685289] ffff888016a57b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.686128] ================================================================== [ 62.687105] Disabling lock debugging due to kernel taint [ 64.996029] BUG: Bad rss-counter state mm:000000002c3786f4 type:MM_FILEPAGES val:33 [ 64.997034] BUG: Bad rss-counter state mm:000000002c3786f4 type:MM_ANONPAGES val:22 [ 65.481279] BUG: Bad rss-counter state mm:0000000051ae4af5 type:MM_FILEPAGES val:33 [ 65.482530] BUG: Bad rss-counter state mm:0000000051ae4af5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44390' (ECDSA) to the list of known hosts. 2023/06/19 21:51:13 fuzzer started 2023/06/19 21:51:13 dialing manager at localhost:44161 2023/06/19 21:51:13 checking machine... 2023/06/19 21:51:13 checking revisions... [ 66.206826] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:51:13 testing simple program... [ 66.260927] cgroup: Unknown subsys name 'net' [ 66.297869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:51:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff110033ddea8 RDX=dffffc0000000000 RSI=ffffffff83644344 RDI=ffff888019eef4e8 RBP=ffff888019eef540 RSP=ffff888019eef478 R8 =0000000000000001 R9 =ffff888019eef528 R10=0000000000038001 R11=000000000008ab54 R12=ffff888019eef548 R13=ffff888019eef530 R14=ffff888019eef529 R15=ffff888019eef4e8 RIP=ffffffff81130706 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 00007f7ee14b8700 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=00007f9b75f73960 CR3=0000000016ad4000 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=00000000000000000000000000000000 XMM01=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363239 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=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=00007fffebe9e000 CR3=00000000161da000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000