syzkaller login: [ 28.748351] BUG: Bad rss-counter state mm:00000000c80a03a6 type:MM_FILEPAGES val:33 [ 28.749894] BUG: Bad rss-counter state mm:00000000c80a03a6 type:MM_ANONPAGES val:22 [ 28.908575] ================================================================== [ 28.909508] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.910443] Read of size 8 at addr ffff88800db1b058 by task sshd/219 [ 28.911316] [ 28.911538] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.912409] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.913395] Call Trace: [ 28.913725] <TASK> [ 28.914020] dump_stack_lvl+0x91/0xf0 [ 28.914517] print_report+0xcc/0x620 [ 28.915011] ? __virt_addr_valid+0x102/0x340 [ 28.915592] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.916215] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.916827] kasan_report+0xbe/0xf0 [ 28.917320] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.917958] vma_interval_tree_remove+0xc75/0xec0 [ 28.918586] vma_prepare+0xc54/0x11a0 [ 28.919067] __split_vma+0x5af/0x950 [ 28.919556] ? __pfx___split_vma+0x10/0x10 [ 28.920082] ? find_held_lock+0x2c/0x110 [ 28.920602] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.921169] ? lock_is_held_type+0x9f/0x120 [ 28.921715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.922322] ? mtree_range_walk+0x632/0x900 [ 28.922878] ? mas_walk+0x5c7/0x7c0 [ 28.923368] do_vmi_munmap+0x1f1/0x2b0 [ 28.923872] mmap_region+0x1f9/0x2660 [ 28.924365] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.924877] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.925599] ? __pfx_lock_acquire+0x10/0x10 [ 28.926139] ? __pfx_mmap_region+0x10/0x10 [ 28.926680] ? security_mmap_addr+0x7d/0xa0 [ 28.927244] ? get_unmapped_area+0x1f5/0x3f0 [ 28.927793] do_mmap+0x854/0xf00 [ 28.928232] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.928727] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.929295] ksys_mmap_pgoff+0x3af/0x500 [ 28.929803] do_syscall_64+0x3f/0x90 [ 28.930296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.930945] RIP: 0033:0x7fc4a8be6d82 [ 28.931412] 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 [ 28.933563] RSP: 002b:00007ffc8ae28f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.934526] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4a8be6d82 [ 28.935393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4a8020000 [ 28.936241] RBP: 00007fc4a8020000 R08: 0000000000000009 R09: 0000000000001000 [ 28.937090] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eeb7c25ec0 [ 28.937940] R13: 00007ffc8ae28f70 R14: 00007ffc8ae28fa0 R15: 00007ffc8ae29300 [ 28.938804] </TASK> [ 28.939098] [ 28.939320] Allocated by task 212: [ 28.939752] kasan_save_stack+0x22/0x50 [ 28.940267] kasan_set_track+0x25/0x30 [ 28.940765] __kasan_slab_alloc+0x59/0x70 [ 28.941294] kmem_cache_alloc+0x16b/0x370 [ 28.941815] vm_area_dup+0x20/0x160 [ 28.942285] __split_vma+0x170/0x950 [ 28.942757] split_vma+0xc6/0x110 [ 28.943206] mprotect_fixup+0x8d2/0xb30 [ 28.943709] do_mprotect_pkey+0x87e/0xd40 [ 28.944231] __x64_sys_mprotect+0x78/0xc0 [ 28.944754] do_syscall_64+0x3f/0x90 [ 28.945239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.945894] [ 28.946108] Freed by task 212: [ 28.946501] kasan_save_stack+0x22/0x50 [ 28.947009] kasan_set_track+0x25/0x30 [ 28.947521] kasan_save_free_info+0x2b/0x50 [ 28.948051] __kasan_slab_free+0x10a/0x190 [ 28.948584] kmem_cache_free+0x10d/0x4d0 [ 28.949090] rcu_core+0x8c8/0x2860 [ 28.949535] __do_softirq+0x1b7/0x7d4 [ 28.950025] [ 28.950240] Last potentially related work creation: [ 28.950828] kasan_save_stack+0x22/0x50 [ 28.951339] __kasan_record_aux_stack+0x8e/0xa0 [ 28.951936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.952596] remove_vma+0x139/0x170 [ 28.953052] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.953614] do_vmi_munmap+0x1f1/0x2b0 [ 28.954101] __vm_munmap+0x138/0x3a0 [ 28.954572] __x64_sys_munmap+0x59/0x80 [ 28.955074] do_syscall_64+0x3f/0x90 [ 28.955560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.956204] [ 28.956422] The buggy address belongs to the object at ffff88800db1b000 [ 28.956422] which belongs to the cache vm_area_struct of size 168 [ 28.957886] The buggy address is located 88 bytes inside of [ 28.957886] freed 168-byte region [ffff88800db1b000, ffff88800db1b0a8) [ 28.959300] [ 28.959519] The buggy address belongs to the physical page: [ 28.960183] page:0000000019d40386 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb1b [ 28.961264] memcg:ffff88800ef19c01 [ 28.961685] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.962388] page_type: 0xffffffff() [ 28.962839] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.963761] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef19c01 [ 28.964679] page dumped because: kasan: bad access detected [ 28.965343] [ 28.965562] Memory state around the buggy address: [ 28.966136] ffff88800db1af00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 28.966997] ffff88800db1af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.967857] >ffff88800db1b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.968720] ^ [ 28.969453] ffff88800db1b080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 28.970326] ffff88800db1b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.971219] ================================================================== [ 28.972308] Disabling lock debugging due to kernel taint [ 30.904208] BUG: Bad rss-counter state mm:000000006471ceda type:MM_FILEPAGES val:33 [ 30.905141] BUG: Bad rss-counter state mm:000000006471ceda type:MM_ANONPAGES val:22 [ 31.425400] BUG: Bad rss-counter state mm:000000002b731a71 type:MM_FILEPAGES val:33 [ 31.426574] BUG: Bad rss-counter state mm:000000002b731a71 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32663' (ECDSA) to the list of known hosts. 2023/06/20 23:37:36 fuzzer started 2023/06/20 23:37:36 dialing manager at localhost:36067 2023/06/20 23:37:36 checking machine... 2023/06/20 23:37:36 checking revisions... [ 32.051374] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:37:36 testing simple program... [ 32.102397] cgroup: Unknown subsys name 'net' [ 32.163974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:37:36 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=00007f5c6fe9ce70 CR3=0000000018118000 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=2036333a37333a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a37333a3332203032 XMM08=3d64696720303d64697520612f6e3d64 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016e06828 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019871b40 RSI=ffffffff8170af58 RDI=0000000000000001 RBP=ffff888016e06828 RSP=ffff888016bc7798 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007f1cbd06e000 R13=00007f1cbd06f000 R14=00007f1cbd06f000 R15=00007f1cbd06e000 RIP=ffffffff8170af5d RFL=00000293 [--S-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 00007f1cbd0a3900 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=00007f1cbd072008 CR3=000000001a340000 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