syzkaller login: [ 58.924256] BUG: Bad rss-counter state mm:000000007c0045a5 type:MM_FILEPAGES val:33 [ 58.925261] BUG: Bad rss-counter state mm:000000007c0045a5 type:MM_ANONPAGES val:22 [ 59.086471] ================================================================== [ 59.087384] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.088361] Read of size 8 at addr ffff88800fb45ed8 by task sshd/219 [ 59.089132] [ 59.089352] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.090568] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.091562] Call Trace: [ 59.091920] [ 59.092210] dump_stack_lvl+0x91/0xf0 [ 59.092724] print_report+0xcc/0x620 [ 59.093208] ? __virt_addr_valid+0x102/0x340 [ 59.093761] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.094404] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.095035] kasan_report+0xbe/0xf0 [ 59.095523] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.096194] vma_interval_tree_remove+0xc75/0xec0 [ 59.096803] vma_prepare+0xc54/0x11a0 [ 59.097289] __split_vma+0x5af/0x950 [ 59.097776] ? __pfx___split_vma+0x10/0x10 [ 59.098316] ? find_held_lock+0x2c/0x110 [ 59.098851] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.099425] ? lock_is_held_type+0x9f/0x120 [ 59.099989] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.100609] ? mtree_range_walk+0x632/0x900 [ 59.101159] ? mas_walk+0x5c7/0x7c0 [ 59.101639] do_vmi_munmap+0x1f1/0x2b0 [ 59.102140] mmap_region+0x1f9/0x2660 [ 59.102625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.103138] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.103854] ? __pfx_lock_acquire+0x10/0x10 [ 59.104394] ? __pfx_mmap_region+0x10/0x10 [ 59.104926] ? security_mmap_addr+0x7d/0xa0 [ 59.105460] ? get_unmapped_area+0x1f5/0x3f0 [ 59.106011] do_mmap+0x854/0xf00 [ 59.106457] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.106959] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.107522] ksys_mmap_pgoff+0x3af/0x500 [ 59.108047] do_syscall_64+0x3f/0x90 [ 59.108536] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.109183] RIP: 0033:0x7fc2ac217d82 [ 59.109642] 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 [ 59.111801] RSP: 002b:00007ffc5a774c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.112706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2ac217d82 [ 59.113560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2ab651000 [ 59.114412] RBP: 00007fc2ab651000 R08: 0000000000000009 R09: 0000000000001000 [ 59.115264] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556842b6b980 [ 59.116188] R13: 00007ffc5a774ca0 R14: 00007ffc5a774cd0 R15: 00007ffc5a775030 [ 59.117048] [ 59.117343] [ 59.117562] Allocated by task 212: [ 59.117992] kasan_save_stack+0x22/0x50 [ 59.118503] kasan_set_track+0x25/0x30 [ 59.118998] __kasan_slab_alloc+0x59/0x70 [ 59.119526] kmem_cache_alloc+0x16b/0x370 [ 59.120068] vm_area_dup+0x20/0x160 [ 59.120525] __split_vma+0x170/0x950 [ 59.121004] split_vma+0xc6/0x110 [ 59.121486] mprotect_fixup+0x8d2/0xb30 [ 59.121993] do_mprotect_pkey+0x87e/0xd40 [ 59.122517] __x64_sys_mprotect+0x78/0xc0 [ 59.123047] do_syscall_64+0x3f/0x90 [ 59.123528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.124188] [ 59.124406] Freed by task 19: [ 59.124793] kasan_save_stack+0x22/0x50 [ 59.125303] kasan_set_track+0x25/0x30 [ 59.125798] kasan_save_free_info+0x2b/0x50 [ 59.126334] __kasan_slab_free+0x10a/0x190 [ 59.126870] kmem_cache_free+0x10d/0x4d0 [ 59.127381] rcu_core+0x8c8/0x2860 [ 59.127835] __do_softirq+0x1b7/0x7d4 [ 59.128317] [ 59.128532] Last potentially related work creation: [ 59.129123] kasan_save_stack+0x22/0x50 [ 59.129627] __kasan_record_aux_stack+0x8e/0xa0 [ 59.130206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.130932] remove_vma+0x139/0x170 [ 59.131388] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.131954] do_vmi_munmap+0x1f1/0x2b0 [ 59.132446] __vm_munmap+0x138/0x3a0 [ 59.132917] __x64_sys_munmap+0x59/0x80 [ 59.133413] do_syscall_64+0x3f/0x90 [ 59.133892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.134543] [ 59.134760] The buggy address belongs to the object at ffff88800fb45e80 [ 59.134760] which belongs to the cache vm_area_struct of size 168 [ 59.136254] The buggy address is located 88 bytes inside of [ 59.136254] freed 168-byte region [ffff88800fb45e80, ffff88800fb45f28) [ 59.137659] [ 59.137873] The buggy address belongs to the physical page: [ 59.138536] page:000000009cd00ce3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfb45 [ 59.139632] memcg:ffff8880195cee01 [ 59.140079] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.140731] page_type: 0xffffffff() [ 59.141184] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.142111] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880195cee01 [ 59.143021] page dumped because: kasan: bad access detected [ 59.143689] [ 59.143918] Memory state around the buggy address: [ 59.144500] ffff88800fb45d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 59.145361] ffff88800fb45e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 59.146222] >ffff88800fb45e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.147084] ^ [ 59.147837] ffff88800fb45f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 59.148699] ffff88800fb45f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.149563] ================================================================== [ 59.150484] Disabling lock debugging due to kernel taint [ 61.503198] BUG: Bad rss-counter state mm:000000002a194351 type:MM_FILEPAGES val:33 [ 61.504284] BUG: Bad rss-counter state mm:000000002a194351 type:MM_ANONPAGES val:22 [ 61.983246] BUG: Bad rss-counter state mm:00000000fabbe8fb type:MM_FILEPAGES val:33 [ 61.984125] BUG: Bad rss-counter state mm:00000000fabbe8fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60826' (ECDSA) to the list of known hosts. 2023/06/19 20:01:11 fuzzer started 2023/06/19 20:01:11 dialing manager at localhost:44161 2023/06/19 20:01:11 checking machine... 2023/06/19 20:01:11 checking revisions... [ 62.609992] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:01:11 testing simple program... [ 62.655104] cgroup: Unknown subsys name 'net' [ 62.720281] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:00:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88800b9b8000 RCX=0000000000000100 RDX=000000000001c060 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800b9b8000 RSP=ffff88806ce096f8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c060 R11=0000000000000000 R12=000000000001c060 R13=ffff88800b9bc4c8 R14=ffff88800b9b8234 R15=0000000000000001 RIP=ffffffff821920cf RFL=00000046 [---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 00007f6dd3f6f900 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=00007fd97adaf380 CR3=000000000c9bc000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007f6dd3f04000 CR3=000000000e22e000 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=2030313a31303a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000