syzkaller login: [ 47.644989] BUG: Bad rss-counter state mm:00000000d461e233 type:MM_FILEPAGES val:33 [ 47.645671] BUG: Bad rss-counter state mm:00000000d461e233 type:MM_ANONPAGES val:22 [ 47.809773] ================================================================== [ 47.810403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.811009] Read of size 8 at addr ffff88800df2eed8 by task sshd/219 [ 47.811524] [ 47.811668] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.812217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.812929] Call Trace: [ 47.813150] [ 47.813342] dump_stack_lvl+0x91/0xf0 [ 47.813674] print_report+0xcc/0x620 [ 47.825185] ? __virt_addr_valid+0x102/0x340 [ 47.825569] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.825987] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.826402] kasan_report+0xbe/0xf0 [ 47.826723] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.827140] vma_interval_tree_remove+0xc75/0xec0 [ 47.827548] vma_prepare+0xc54/0x11a0 [ 47.827878] __split_vma+0x5af/0x950 [ 47.828201] ? __pfx___split_vma+0x10/0x10 [ 47.828558] ? find_held_lock+0x2c/0x110 [ 47.832966] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.833349] ? lock_is_held_type+0x9f/0x120 [ 47.833711] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.834112] ? mtree_range_walk+0x632/0x900 [ 47.834491] ? mas_walk+0x5c7/0x7c0 [ 47.834807] do_vmi_munmap+0x1f1/0x2b0 [ 47.835141] mmap_region+0x1f9/0x2660 [ 47.835469] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.835812] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.836292] ? __pfx_lock_acquire+0x10/0x10 [ 47.836646] ? __pfx_mmap_region+0x10/0x10 [ 47.837051] ? security_mmap_addr+0x7d/0xa0 [ 47.837409] ? get_unmapped_area+0x1f5/0x3f0 [ 47.837778] do_mmap+0x854/0xf00 [ 47.838076] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.838411] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.838788] ksys_mmap_pgoff+0x3af/0x500 [ 47.839126] do_syscall_64+0x3f/0x90 [ 47.839457] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.839896] RIP: 0033:0x7fdf8498bd82 [ 47.840204] 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 [ 47.845608] RSP: 002b:00007ffe06c3f758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.846208] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdf8498bd82 [ 47.846792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdf83dc5000 [ 47.847346] RBP: 00007fdf83dc5000 R08: 0000000000000009 R09: 0000000000001000 [ 47.847955] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a981ff3ec0 [ 47.848521] R13: 00007ffe06c3f770 R14: 00007ffe06c3f7a0 R15: 00007ffe06c3fb00 [ 47.855469] [ 47.856003] [ 47.856470] Allocated by task 212: [ 47.857436] kasan_save_stack+0x22/0x50 [ 47.858564] kasan_set_track+0x25/0x30 [ 47.859521] __kasan_slab_alloc+0x59/0x70 [ 47.860529] kmem_cache_alloc+0x16b/0x370 [ 47.861778] vm_area_dup+0x20/0x160 [ 47.862864] __split_vma+0x170/0x950 [ 47.863713] split_vma+0xc6/0x110 [ 47.864503] mprotect_fixup+0x8d2/0xb30 [ 47.865505] do_mprotect_pkey+0x87e/0xd40 [ 47.866465] __x64_sys_mprotect+0x78/0xc0 [ 47.867418] do_syscall_64+0x3f/0x90 [ 47.868278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.869595] [ 47.870036] Freed by task 19: [ 47.870747] kasan_save_stack+0x22/0x50 [ 47.871665] kasan_set_track+0x25/0x30 [ 47.872554] kasan_save_free_info+0x2b/0x50 [ 47.873573] __kasan_slab_free+0x10a/0x190 [ 47.874569] kmem_cache_free+0x10d/0x4d0 [ 47.875545] rcu_core+0x8c8/0x2860 [ 47.876379] __do_softirq+0x1b7/0x7d4 [ 47.877257] [ 47.877632] Last potentially related work creation: [ 47.878761] kasan_save_stack+0x22/0x50 [ 47.884817] __kasan_record_aux_stack+0x8e/0xa0 [ 47.885955] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.887146] remove_vma+0x139/0x170 [ 47.888015] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.889063] do_vmi_munmap+0x1f1/0x2b0 [ 47.889946] __vm_munmap+0x138/0x3a0 [ 47.890834] __x64_sys_munmap+0x59/0x80 [ 47.891818] do_syscall_64+0x3f/0x90 [ 47.892678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.896589] [ 47.897069] Second to last potentially related work creation: [ 47.898510] kasan_save_stack+0x22/0x50 [ 47.899595] __kasan_record_aux_stack+0x8e/0xa0 [ 47.900784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.902000] remove_vma+0x139/0x170 [ 47.902841] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.903884] do_vmi_munmap+0x1f1/0x2b0 [ 47.904774] __vm_munmap+0x138/0x3a0 [ 47.908374] __x64_sys_munmap+0x59/0x80 [ 47.909484] do_syscall_64+0x3f/0x90 [ 47.910364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.911578] [ 47.911968] The buggy address belongs to the object at ffff88800df2ee80 [ 47.911968] which belongs to the cache vm_area_struct of size 168 [ 47.914915] The buggy address is located 88 bytes inside of [ 47.914915] freed 168-byte region [ffff88800df2ee80, ffff88800df2ef28) [ 47.916599] [ 47.916758] The buggy address belongs to the physical page: [ 47.917215] page:00000000d518f232 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf2e [ 47.917925] memcg:ffff8880141e9201 [ 47.918205] flags: 0x100000000000200(slab|node=0|zone=1) [ 47.918634] page_type: 0xffffffff() [ 47.918934] raw: 0100000000000200 ffff88800879fc80 ffffea00003c2980 dead000000000006 [ 47.919538] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141e9201 [ 47.920134] page dumped because: kasan: bad access detected [ 47.920592] [ 47.920751] Memory state around the buggy address: [ 47.921174] ffff88800df2ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.921765] ffff88800df2ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 47.922316] >ffff88800df2ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.922870] ^ [ 47.923342] ffff88800df2ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 47.923894] ffff88800df2ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 47.924445] ================================================================== [ 47.925874] Disabling lock debugging due to kernel taint [ 50.360854] BUG: Bad rss-counter state mm:000000004b7c70d7 type:MM_FILEPAGES val:33 [ 50.361499] BUG: Bad rss-counter state mm:000000004b7c70d7 type:MM_ANONPAGES val:22 [ 50.800129] BUG: Bad rss-counter state mm:00000000873fd8d6 type:MM_FILEPAGES val:33 [ 50.800829] BUG: Bad rss-counter state mm:00000000873fd8d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46603' (ECDSA) to the list of known hosts. 2023/06/20 08:18:29 fuzzer started 2023/06/20 08:18:29 dialing manager at localhost:44161 2023/06/20 08:18:29 checking machine... 2023/06/20 08:18:29 checking revisions... [ 51.532580] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:18:29 testing simple program... [ 51.573995] cgroup: Unknown subsys name 'net' [ 51.637178] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:18:20 Registers: info registers vcpu 0 RAX=ffff88800dfbebe0 RBX=0000000000000000 RCX=00000000800d000d RDX=00000000800d0009 RSI=ffffffff81806c6b RDI=0000000000000000 RBP=ffff8880162a7820 RSP=ffff8880162a7760 R8 =00000000800d000d R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffffffff81806df1 R12=ffff88800844f780 R13=ffff88800dfbe980 R14=ffffea000037ef80 R15=ffff88806ce3de00 RIP=ffffffff818072a6 RFL=00000082 [--S----] 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 00007f8923ed7900 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=00007f72f26919f0 CR3=0000000016f8c000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85dbc1f8 RCX=ffffffff813ad6cf RDX=0000000000000000 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1f4 RSP=ffff88806cf099e0 R8 =ffffffff860d68c0 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1f0 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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=00007f53a3549328 CR3=0000000005482000 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