syzkaller login: [ 23.728341] BUG: Bad rss-counter state mm:00000000f2122458 type:MM_FILEPAGES val:33 [ 23.729567] BUG: Bad rss-counter state mm:00000000f2122458 type:MM_ANONPAGES val:22 [ 23.893546] ================================================================== [ 23.894467] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.895408] Read of size 8 at addr ffff88800ea9e140 by task sshd/220 [ 23.896170] [ 23.896383] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.897390] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.898392] Call Trace: [ 23.898713] [ 23.898995] dump_stack_lvl+0x91/0xf0 [ 23.899482] print_report+0xcc/0x620 [ 23.899968] ? __virt_addr_valid+0x102/0x340 [ 23.900528] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901171] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.901814] kasan_report+0xbe/0xf0 [ 23.902316] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.902968] vma_interval_tree_remove+0xc75/0xec0 [ 23.903578] vma_prepare+0xc54/0x11a0 [ 23.904064] __split_vma+0x5af/0x950 [ 23.904541] ? __pfx___split_vma+0x10/0x10 [ 23.905079] ? find_held_lock+0x2c/0x110 [ 23.905614] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.906179] ? lock_is_held_type+0x9f/0x120 [ 23.906738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.907352] ? mtree_range_walk+0x632/0x900 [ 23.907916] ? mas_walk+0x5c7/0x7c0 [ 23.908398] do_vmi_munmap+0x1f1/0x2b0 [ 23.908901] mmap_region+0x1f9/0x2660 [ 23.909395] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.909911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.910640] ? __pfx_lock_acquire+0x10/0x10 [ 23.911181] ? __pfx_mmap_region+0x10/0x10 [ 23.911725] ? security_mmap_addr+0x7d/0xa0 [ 23.912270] ? get_unmapped_area+0x1f5/0x3f0 [ 23.912835] do_mmap+0x854/0xf00 [ 23.913281] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.913786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.914351] ksys_mmap_pgoff+0x3af/0x500 [ 23.914879] do_syscall_64+0x3f/0x90 [ 23.915363] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.916022] RIP: 0033:0x7f0849bdad82 [ 23.916481] 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 [ 23.918629] RSP: 002b:00007fff7c6ed0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.919549] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0849bdad82 [ 23.920409] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0849014000 [ 23.921263] RBP: 00007f0849014000 R08: 0000000000000009 R09: 0000000000001000 [ 23.922131] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a7c393f70 [ 23.922993] R13: 00007fff7c6ed0e0 R14: 00007fff7c6ed110 R15: 00007fff7c6ed470 [ 23.923864] [ 23.924163] [ 23.924381] Allocated by task 213: [ 23.924814] kasan_save_stack+0x22/0x50 [ 23.925324] kasan_set_track+0x25/0x30 [ 23.925813] __kasan_slab_alloc+0x59/0x70 [ 23.926342] kmem_cache_alloc+0x16b/0x370 [ 23.926879] vm_area_dup+0x20/0x160 [ 23.927343] __split_vma+0x170/0x950 [ 23.927825] split_vma+0xc6/0x110 [ 23.928266] mprotect_fixup+0x8d2/0xb30 [ 23.928777] do_mprotect_pkey+0x87e/0xd40 [ 23.929306] __x64_sys_mprotect+0x78/0xc0 [ 23.929833] do_syscall_64+0x3f/0x90 [ 23.930316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930970] [ 23.931189] Freed by task 213: [ 23.931587] kasan_save_stack+0x22/0x50 [ 23.932096] kasan_set_track+0x25/0x30 [ 23.932601] kasan_save_free_info+0x2b/0x50 [ 23.933140] __kasan_slab_free+0x10a/0x190 [ 23.933675] kmem_cache_free+0x10d/0x4d0 [ 23.934182] rcu_core+0x8c8/0x2860 [ 23.934640] __do_softirq+0x1b7/0x7d4 [ 23.935124] [ 23.935341] Last potentially related work creation: [ 23.935927] kasan_save_stack+0x22/0x50 [ 23.936431] __kasan_record_aux_stack+0x8e/0xa0 [ 23.937006] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.937655] remove_vma+0x139/0x170 [ 23.938107] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.938687] do_vmi_munmap+0x1f1/0x2b0 [ 23.939174] __vm_munmap+0x138/0x3a0 [ 23.939652] __x64_sys_munmap+0x59/0x80 [ 23.940153] do_syscall_64+0x3f/0x90 [ 23.940629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.941283] [ 23.941500] Second to last potentially related work creation: [ 23.942179] kasan_save_stack+0x22/0x50 [ 23.942700] __kasan_record_aux_stack+0x8e/0xa0 [ 23.943280] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.943929] remove_vma+0x139/0x170 [ 23.944383] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.944941] do_vmi_munmap+0x1f1/0x2b0 [ 23.945434] mmap_region+0x1f9/0x2660 [ 23.945908] do_mmap+0x854/0xf00 [ 23.946335] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.946840] ksys_mmap_pgoff+0x3af/0x500 [ 23.947348] do_syscall_64+0x3f/0x90 [ 23.947826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.948471] [ 23.948684] The buggy address belongs to the object at ffff88800ea9e0e8 [ 23.948684] which belongs to the cache vm_area_struct of size 168 [ 23.950145] The buggy address is located 88 bytes inside of [ 23.950145] freed 168-byte region [ffff88800ea9e0e8, ffff88800ea9e190) [ 23.951563] [ 23.951780] The buggy address belongs to the physical page: [ 23.952437] page:000000006bf515bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea9e [ 23.953525] memcg:ffff88800e9b6a01 [ 23.953958] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.954670] page_type: 0xffffffff() [ 23.955123] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c5000 dead000000000007 [ 23.956055] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9b6a01 [ 23.956977] page dumped because: kasan: bad access detected [ 23.957648] [ 23.957861] Memory state around the buggy address: [ 23.958457] ffff88800ea9e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.959323] ffff88800ea9e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.960191] >ffff88800ea9e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.961074] ^ [ 23.961735] ffff88800ea9e180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.962656] ffff88800ea9e200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.963562] ================================================================== [ 23.964860] Disabling lock debugging due to kernel taint [ 26.222555] BUG: Bad rss-counter state mm:00000000415f2c17 type:MM_FILEPAGES val:33 [ 26.223713] BUG: Bad rss-counter state mm:00000000415f2c17 type:MM_ANONPAGES val:22 [ 26.719341] BUG: Bad rss-counter state mm:0000000095492316 type:MM_FILEPAGES val:33 [ 26.721023] BUG: Bad rss-counter state mm:0000000095492316 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60016' (ECDSA) to the list of known hosts. 2023/06/20 20:03:52 fuzzer started 2023/06/20 20:03:52 dialing manager at localhost:36067 2023/06/20 20:03:52 checking machine... 2023/06/20 20:03:52 checking revisions... [ 27.450185] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:03:52 testing simple program... [ 27.499032] cgroup: Unknown subsys name 'net' [ 27.542621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:52 Registers: info registers vcpu 0 RAX=ffff888014758001 RBX=ffff8880147578d8 RCX=0000000000000001 RDX=ffff888014757d01 RSI=ffff888014757d80 RDI=ffff8880147578e8 RBP=ffff888014757d80 RSP=ffff888014757830 R8 =0000000000000001 R9 =ffff888014757918 R10=0000000000038001 R11=0000000000023548 R12=0000000000000008 R13=ffff888014750000 R14=ffff888014757d80 R15=ffff8880147578d8 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007f6b3d826900 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=00007f6b3cc13500 CR3=000000000d7b0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2079f20938323ae300000000000ae988 XMM05=c74fa437ab3119bc0000000000134728 XMM06=19e9129bd510f2350000000000133250 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff8880166178c0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007fb06eaff900 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=00007ffe467ad000 CR3=0000000015ea6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000