syzkaller login: [ 37.628112] BUG: Bad rss-counter state mm:000000004922d6ac type:MM_FILEPAGES val:33 [ 37.628796] BUG: Bad rss-counter state mm:000000004922d6ac type:MM_ANONPAGES val:22 [ 37.830397] ================================================================== [ 37.831065] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.831728] Read of size 8 at addr ffff8880161414e0 by task sshd/223 [ 37.832296] [ 37.832456] CPU: 1 PID: 223 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.833076] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.833777] Call Trace: [ 37.834012] [ 37.834228] dump_stack_lvl+0x91/0xf0 [ 37.834586] print_report+0xcc/0x620 [ 37.834937] ? __virt_addr_valid+0x102/0x340 [ 37.835341] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.835777] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.837831] kasan_report+0xbe/0xf0 [ 37.838228] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.838662] vma_interval_tree_remove+0xc75/0xec0 [ 37.839139] vma_prepare+0xc54/0x11a0 [ 37.850151] __split_vma+0x5af/0x950 [ 37.850522] ? __pfx___split_vma+0x10/0x10 [ 37.850923] ? find_held_lock+0x2c/0x110 [ 37.851321] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.851732] ? lock_is_held_type+0x9f/0x120 [ 37.852145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.852591] ? mtree_range_walk+0x632/0x900 [ 37.853012] ? mas_walk+0x5c7/0x7c0 [ 37.853358] do_vmi_munmap+0x1f1/0x2b0 [ 37.853739] mmap_region+0x1f9/0x2660 [ 37.854100] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.854484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.855020] ? __pfx_lock_acquire+0x10/0x10 [ 37.855414] ? __pfx_mmap_region+0x10/0x10 [ 37.855800] ? security_mmap_addr+0x7d/0xa0 [ 37.856385] ? get_unmapped_area+0x1f5/0x3f0 [ 37.856796] do_mmap+0x854/0xf00 [ 37.857184] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.857555] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.857952] ksys_mmap_pgoff+0x3af/0x500 [ 37.858381] do_syscall_64+0x3f/0x90 [ 37.858751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.859298] RIP: 0033:0x7f809b332d82 [ 37.859655] 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 [ 37.861446] RSP: 002b:00007fff540497e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.862101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f809b332d82 [ 37.862663] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f809a76c000 [ 37.863305] RBP: 00007f809a76c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.863953] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b6be1ef60 [ 37.864708] R13: 00007fff54049800 R14: 00007fff54049830 R15: 00007fff54049b90 [ 37.865395] [ 37.865620] [ 37.865778] Allocated by task 214: [ 37.866156] kasan_save_stack+0x22/0x50 [ 37.866532] kasan_set_track+0x25/0x30 [ 37.866921] __kasan_slab_alloc+0x59/0x70 [ 37.867359] kmem_cache_alloc+0x16b/0x370 [ 37.867704] vm_area_dup+0x20/0x160 [ 37.868189] __split_vma+0x170/0x950 [ 37.868508] split_vma+0xc6/0x110 [ 37.868797] mprotect_fixup+0x8d2/0xb30 [ 37.869210] do_mprotect_pkey+0x87e/0xd40 [ 37.869561] __x64_sys_mprotect+0x78/0xc0 [ 37.869906] do_syscall_64+0x3f/0x90 [ 37.870306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.870741] [ 37.870886] Freed by task 214: [ 37.871224] kasan_save_stack+0x22/0x50 [ 37.871556] kasan_set_track+0x25/0x30 [ 37.871886] kasan_save_free_info+0x2b/0x50 [ 37.872669] __kasan_slab_free+0x10a/0x190 [ 37.872969] kmem_cache_free+0x10d/0x4d0 [ 37.873917] rcu_core+0x8c8/0x2860 [ 37.874825] __do_softirq+0x1b7/0x7d4 [ 37.875885] [ 37.876398] Last potentially related work creation: [ 37.877909] kasan_save_stack+0x22/0x50 [ 37.879127] __kasan_record_aux_stack+0x8e/0xa0 [ 37.880487] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.881925] remove_vma+0x139/0x170 [ 37.883081] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.884402] do_vmi_munmap+0x1f1/0x2b0 [ 37.885363] __vm_munmap+0x138/0x3a0 [ 37.886300] __x64_sys_munmap+0x59/0x80 [ 37.887311] do_syscall_64+0x3f/0x90 [ 37.888283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.889966] [ 37.890401] Second to last potentially related work creation: [ 37.891889] kasan_save_stack+0x22/0x50 [ 37.893146] __kasan_record_aux_stack+0x8e/0xa0 [ 37.894425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.895704] remove_vma+0x139/0x170 [ 37.896678] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.897800] do_vmi_munmap+0x1f1/0x2b0 [ 37.898767] mmap_region+0x1f9/0x2660 [ 37.899759] do_mmap+0x854/0xf00 [ 37.900702] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.901732] ksys_mmap_pgoff+0x3af/0x500 [ 37.902816] do_syscall_64+0x3f/0x90 [ 37.903834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.905316] [ 37.905725] The buggy address belongs to the object at ffff888016141488 [ 37.905725] which belongs to the cache vm_area_struct of size 168 [ 37.909480] The buggy address is located 88 bytes inside of [ 37.909480] freed 168-byte region [ffff888016141488, ffff888016141530) [ 37.912953] [ 37.913447] The buggy address belongs to the physical page: [ 37.914909] page:000000006386c9ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16141 [ 37.917480] memcg:ffff88800fe78c01 [ 37.918419] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.919898] page_type: 0xffffffff() [ 37.920900] raw: 0100000000000200 ffff88800879fc80 ffffea00003c0340 0000000000000007 [ 37.923162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe78c01 [ 37.925496] page dumped because: kasan: bad access detected [ 37.927123] [ 37.927564] Memory state around the buggy address: [ 37.928984] ffff888016141380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.931189] ffff888016141400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 37.933243] >ffff888016141480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.935279] ^ [ 37.937218] ffff888016141500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 37.939316] ffff888016141580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.941322] ================================================================== [ 37.943386] Disabling lock debugging due to kernel taint [ 40.377319] BUG: Bad rss-counter state mm:00000000c923385f type:MM_FILEPAGES val:33 [ 40.377899] BUG: Bad rss-counter state mm:00000000c923385f type:MM_ANONPAGES val:22 [ 40.692830] BUG: Bad rss-counter state mm:00000000535167fb type:MM_FILEPAGES val:33 [ 40.693621] BUG: Bad rss-counter state mm:00000000535167fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35348' (ECDSA) to the list of known hosts. 2023/06/20 00:02:59 fuzzer started 2023/06/20 00:02:59 dialing manager at localhost:44161 2023/06/20 00:02:59 checking machine... 2023/06/20 00:02:59 checking revisions... [ 41.236814] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:02:59 testing simple program... [ 41.276243] cgroup: Unknown subsys name 'net' [ 41.330504] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:02:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fe1f3745950 CR3=000000000d89e000 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=2038353a32303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a32303a3030203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a8d8 RBX=ffffffff860546c4 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546c4 RSP=ffff88806cf099e0 R8 =ffffffff864baff8 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546c4 R13=ffffffff8605469c R14=ffffffff860546c0 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007f8bf307f900 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=00007f8bf301c008 CR3=000000000fd54000 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