syzkaller login: [ 35.397743] BUG: Bad rss-counter state mm:0000000015477cd6 type:MM_FILEPAGES val:33 [ 35.399011] BUG: Bad rss-counter state mm:0000000015477cd6 type:MM_ANONPAGES val:22 [ 35.557890] ================================================================== [ 35.558965] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.560094] Read of size 8 at addr ffff88800e90a5c8 by task sshd/219 [ 35.561196] [ 35.561453] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.562465] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.563717] Call Trace: [ 35.564097] [ 35.564453] dump_stack_lvl+0x91/0xf0 [ 35.565030] print_report+0xcc/0x620 [ 35.565595] ? __virt_addr_valid+0x102/0x340 [ 35.566264] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.567013] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.567766] kasan_report+0xbe/0xf0 [ 35.568364] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.569134] vma_interval_tree_remove+0xc75/0xec0 [ 35.569876] vma_prepare+0xc54/0x11a0 [ 35.570460] __split_vma+0x5af/0x950 [ 35.571038] ? __pfx___split_vma+0x10/0x10 [ 35.571689] ? find_held_lock+0x2c/0x110 [ 35.572354] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.572962] ? lock_is_held_type+0x9f/0x120 [ 35.573514] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.574124] ? mtree_range_walk+0x632/0x900 [ 35.574675] ? mas_walk+0x5c7/0x7c0 [ 35.575150] do_vmi_munmap+0x1f1/0x2b0 [ 35.575642] mmap_region+0x1f9/0x2660 [ 35.576122] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.576643] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.577359] ? __pfx_lock_acquire+0x10/0x10 [ 35.577881] ? __pfx_mmap_region+0x10/0x10 [ 35.578420] ? security_mmap_addr+0x7d/0xa0 [ 35.578949] ? get_unmapped_area+0x1f5/0x3f0 [ 35.579510] do_mmap+0x854/0xf00 [ 35.579959] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.580491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.581061] ksys_mmap_pgoff+0x3af/0x500 [ 35.581566] do_syscall_64+0x3f/0x90 [ 35.582063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.582728] RIP: 0033:0x7ff8042bfd82 [ 35.583196] 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 [ 35.585358] RSP: 002b:00007ffeed9f1698 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.586275] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8042bfd82 [ 35.587127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8036f9000 [ 35.587983] RBP: 00007ff8036f9000 R08: 0000000000000009 R09: 0000000000001000 [ 35.588829] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557aa355dec0 [ 35.589679] R13: 00007ffeed9f16b0 R14: 00007ffeed9f16e0 R15: 00007ffeed9f1a40 [ 35.590539] [ 35.590833] [ 35.591051] Allocated by task 212: [ 35.591485] kasan_save_stack+0x22/0x50 [ 35.591990] kasan_set_track+0x25/0x30 [ 35.592504] __kasan_slab_alloc+0x59/0x70 [ 35.593028] kmem_cache_alloc+0x16b/0x370 [ 35.593556] vm_area_dup+0x20/0x160 [ 35.594014] __split_vma+0x170/0x950 [ 35.594480] split_vma+0xc6/0x110 [ 35.594920] mprotect_fixup+0x8d2/0xb30 [ 35.595433] do_mprotect_pkey+0x87e/0xd40 [ 35.595960] __x64_sys_mprotect+0x78/0xc0 [ 35.596504] do_syscall_64+0x3f/0x90 [ 35.596981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.597632] [ 35.597848] Freed by task 203: [ 35.598246] kasan_save_stack+0x22/0x50 [ 35.598754] kasan_set_track+0x25/0x30 [ 35.599251] kasan_save_free_info+0x2b/0x50 [ 35.599786] __kasan_slab_free+0x10a/0x190 [ 35.600346] kmem_cache_free+0x10d/0x4d0 [ 35.600856] rcu_core+0x8c8/0x2860 [ 35.601293] __do_softirq+0x1b7/0x7d4 [ 35.601780] [ 35.602086] Last potentially related work creation: [ 35.602695] kasan_save_stack+0x22/0x50 [ 35.603205] __kasan_record_aux_stack+0x8e/0xa0 [ 35.603790] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.604449] remove_vma+0x139/0x170 [ 35.604902] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.605460] do_vmi_munmap+0x1f1/0x2b0 [ 35.605953] __vm_munmap+0x138/0x3a0 [ 35.606419] __x64_sys_munmap+0x59/0x80 [ 35.606914] do_syscall_64+0x3f/0x90 [ 35.607386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.608063] [ 35.608293] The buggy address belongs to the object at ffff88800e90a570 [ 35.608293] which belongs to the cache vm_area_struct of size 168 [ 35.609819] The buggy address is located 88 bytes inside of [ 35.609819] freed 168-byte region [ffff88800e90a570, ffff88800e90a618) [ 35.611244] [ 35.611464] The buggy address belongs to the physical page: [ 35.612125] page:00000000a21aabee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe90a [ 35.613232] memcg:ffff888017f25301 [ 35.613656] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.614297] page_type: 0xffffffff() [ 35.614750] raw: 0100000000000200 ffff8880087a0c80 ffffea00003713c0 dead000000000008 [ 35.615658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f25301 [ 35.616586] page dumped because: kasan: bad access detected [ 35.617254] [ 35.617471] Memory state around the buggy address: [ 35.618047] ffff88800e90a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.618902] ffff88800e90a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 35.619789] >ffff88800e90a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.620664] ^ [ 35.621333] ffff88800e90a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 35.622194] ffff88800e90a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.623059] ================================================================== [ 35.624026] Disabling lock debugging due to kernel taint [ 37.639414] BUG: Bad rss-counter state mm:000000002a6753ee type:MM_FILEPAGES val:33 [ 37.640110] BUG: Bad rss-counter state mm:000000002a6753ee type:MM_ANONPAGES val:22 [ 37.986633] BUG: Bad rss-counter state mm:000000006824b20f type:MM_FILEPAGES val:33 [ 37.987897] BUG: Bad rss-counter state mm:000000006824b20f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12555' (ECDSA) to the list of known hosts. 2023/06/21 04:46:34 fuzzer started 2023/06/21 04:46:35 dialing manager at localhost:36067 2023/06/21 04:46:35 checking machine... 2023/06/21 04:46:35 checking revisions... [ 38.580426] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:46:35 testing simple program... [ 38.637668] cgroup: Unknown subsys name 'net' [ 38.678709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:46:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f97ae9c7000 CR3=000000000966a000 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=2034333a36343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a36343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f2bdcc39400 RCX=ffffffff813a0b19 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffffffffffffff RSP=ffff88801988f7b0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800d5a51c0 R15=0000000000092cc0 RIP=ffffffff814c0250 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 00007f2bdc746900 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=00007ffc07467000 CR3=000000000ebec000 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