syzkaller login: [ 33.145482] BUG: Bad rss-counter state mm:00000000901c4fb3 type:MM_FILEPAGES val:33 [ 33.147466] BUG: Bad rss-counter state mm:00000000901c4fb3 type:MM_ANONPAGES val:22 [ 33.312470] ================================================================== [ 33.313657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.314970] Read of size 8 at addr ffff888008f3b968 by task sshd/220 [ 33.315864] [ 33.316115] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.317108] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.318220] Call Trace: [ 33.318586] [ 33.318908] dump_stack_lvl+0x91/0xf0 [ 33.319472] print_report+0xcc/0x620 [ 33.320020] ? __virt_addr_valid+0x102/0x340 [ 33.320628] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.321323] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.322018] kasan_report+0xbe/0xf0 [ 33.322562] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.323282] vma_interval_tree_remove+0xc75/0xec0 [ 33.323961] vma_prepare+0xc54/0x11a0 [ 33.324508] __split_vma+0x5af/0x950 [ 33.325043] ? __pfx___split_vma+0x10/0x10 [ 33.325648] ? find_held_lock+0x2c/0x110 [ 33.326241] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.326885] ? lock_is_held_type+0x9f/0x120 [ 33.327509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.328201] ? mtree_range_walk+0x632/0x900 [ 33.328829] ? mas_walk+0x5c7/0x7c0 [ 33.329365] do_vmi_munmap+0x1f1/0x2b0 [ 33.329926] mmap_region+0x1f9/0x2660 [ 33.330480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.331060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.331895] ? __pfx_lock_acquire+0x10/0x10 [ 33.332505] ? __pfx_mmap_region+0x10/0x10 [ 33.333106] ? security_mmap_addr+0x7d/0xa0 [ 33.333715] ? get_unmapped_area+0x1f5/0x3f0 [ 33.334342] do_mmap+0x854/0xf00 [ 33.334841] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.335414] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.336048] ksys_mmap_pgoff+0x3af/0x500 [ 33.336626] do_syscall_64+0x3f/0x90 [ 33.337172] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.337907] RIP: 0033:0x7fe6af861d82 [ 33.338428] 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 [ 33.340879] RSP: 002b:00007ffc4df53b38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.341909] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6af861d82 [ 33.342881] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6aec9b000 [ 33.343930] RBP: 00007fe6aec9b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.344897] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fad0b98b20 [ 33.345867] R13: 00007ffc4df53b50 R14: 00007ffc4df53b80 R15: 00007ffc4df53ee0 [ 33.346838] [ 33.347170] [ 33.347436] Allocated by task 213: [ 33.347916] kasan_save_stack+0x22/0x50 [ 33.348475] kasan_set_track+0x25/0x30 [ 33.349031] __kasan_slab_alloc+0x59/0x70 [ 33.349615] kmem_cache_alloc+0x16b/0x370 [ 33.350198] vm_area_dup+0x20/0x160 [ 33.350704] __split_vma+0x170/0x950 [ 33.351236] split_vma+0xc6/0x110 [ 33.351725] mprotect_fixup+0x8d2/0xb30 [ 33.352287] do_mprotect_pkey+0x87e/0xd40 [ 33.352866] __x64_sys_mprotect+0x78/0xc0 [ 33.353446] do_syscall_64+0x3f/0x90 [ 33.353981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.354708] [ 33.354956] Freed by task 213: [ 33.355421] kasan_save_stack+0x22/0x50 [ 33.355999] kasan_set_track+0x25/0x30 [ 33.356558] kasan_save_free_info+0x2b/0x50 [ 33.357159] __kasan_slab_free+0x10a/0x190 [ 33.357766] kmem_cache_free+0x10d/0x4d0 [ 33.358341] rcu_core+0x8c8/0x2860 [ 33.358841] __do_softirq+0x1b7/0x7d4 [ 33.359399] [ 33.359649] Last potentially related work creation: [ 33.360322] kasan_save_stack+0x22/0x50 [ 33.360897] __kasan_record_aux_stack+0x8e/0xa0 [ 33.361533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.362250] remove_vma+0x139/0x170 [ 33.362743] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.363380] do_vmi_munmap+0x1f1/0x2b0 [ 33.363927] __vm_munmap+0x138/0x3a0 [ 33.364438] __x64_sys_munmap+0x59/0x80 [ 33.364992] do_syscall_64+0x3f/0x90 [ 33.365515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.366225] [ 33.366467] Second to last potentially related work creation: [ 33.367229] kasan_save_stack+0x22/0x50 [ 33.367789] __kasan_record_aux_stack+0x8e/0xa0 [ 33.368422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.369129] remove_vma+0x139/0x170 [ 33.369628] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.370248] do_vmi_munmap+0x1f1/0x2b0 [ 33.370782] mmap_region+0x1f9/0x2660 [ 33.371319] do_mmap+0x854/0xf00 [ 33.371801] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.372342] ksys_mmap_pgoff+0x7d/0x500 [ 33.372891] do_syscall_64+0x3f/0x90 [ 33.373414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.374130] [ 33.374365] The buggy address belongs to the object at ffff888008f3b910 [ 33.374365] which belongs to the cache vm_area_struct of size 168 [ 33.376025] The buggy address is located 88 bytes inside of [ 33.376025] freed 168-byte region [ffff888008f3b910, ffff888008f3b9b8) [ 33.377590] [ 33.377831] The buggy address belongs to the physical page: [ 33.378565] page:00000000841060d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8f3b [ 33.379774] memcg:ffff888008f3a101 [ 33.380255] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.380972] page_type: 0xffffffff() [ 33.381476] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.382500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008f3a101 [ 33.383518] page dumped because: kasan: bad access detected [ 33.384245] [ 33.384486] Memory state around the buggy address: [ 33.385130] ffff888008f3b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.386082] ffff888008f3b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.387036] >ffff888008f3b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.388017] ^ [ 33.388886] ffff888008f3b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.389832] ffff888008f3ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.390766] ================================================================== [ 33.392170] Disabling lock debugging due to kernel taint [ 35.307974] BUG: Bad rss-counter state mm:00000000fb88b7bd type:MM_FILEPAGES val:33 [ 35.309068] BUG: Bad rss-counter state mm:00000000fb88b7bd type:MM_ANONPAGES val:22 [ 35.706680] BUG: Bad rss-counter state mm:000000007f638e72 type:MM_FILEPAGES val:33 [ 35.708356] BUG: Bad rss-counter state mm:000000007f638e72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9050' (ECDSA) to the list of known hosts. 2023/06/20 04:45:01 fuzzer started 2023/06/20 04:45:02 dialing manager at localhost:44161 2023/06/20 04:45:02 checking machine... 2023/06/20 04:45:02 checking revisions... [ 36.360265] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:45:02 testing simple program... [ 36.417370] cgroup: Unknown subsys name 'net' [ 36.464380] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:44:58 Registers: info registers vcpu 0 RAX=1ffffffff0c0901a RBX=ffffffff860480d4 RCX=ffffffff844984a5 RDX=0000000000000000 RSI=ffffffff864a8734 RDI=ffffffff860480c4 RBP=ffffffff860480c4 RSP=ffff888015946ee0 R8 =ffffffff864a8734 R9 =ffff888015946fd8 R10=0000000000038001 R11=00000000000b3b3c R12=ffffffff860480e4 R13=ffffffff860480c4 R14=ffffffff860480c4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007f50f6902900 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=00007f50f68c7008 CR3=000000000ebb2000 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=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 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=00007fe414725c00 CR3=00000000174d2000 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=2031303a35343a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a35343a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000