syzkaller login: [ 31.830856] BUG: Bad rss-counter state mm:00000000158c3d9b type:MM_FILEPAGES val:33 [ 31.832052] BUG: Bad rss-counter state mm:00000000158c3d9b type:MM_ANONPAGES val:22 [ 31.869665] ================================================================== [ 31.870646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.871804] Read of size 8 at addr ffff88801685ab38 by task sshd/221 [ 31.872634] [ 31.872851] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.873712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.874700] Call Trace: [ 31.875022] [ 31.875311] dump_stack_lvl+0x91/0xf0 [ 31.875820] print_report+0xcc/0x620 [ 31.876309] ? __virt_addr_valid+0x102/0x340 [ 31.876858] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.877479] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.878125] kasan_report+0xbe/0xf0 [ 31.878605] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.879492] vma_interval_tree_remove+0xc75/0xec0 [ 31.880100] vma_prepare+0xc54/0x11a0 [ 31.880596] __split_vma+0x5af/0x950 [ 31.881068] ? __pfx___split_vma+0x10/0x10 [ 31.881628] ? find_held_lock+0x2c/0x110 [ 31.882161] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.882720] ? lock_is_held_type+0x9f/0x120 [ 31.883266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.883871] ? mtree_range_walk+0x632/0x900 [ 31.884432] ? mas_walk+0x5c7/0x7c0 [ 31.884918] do_vmi_munmap+0x1f1/0x2b0 [ 31.885411] mmap_region+0x1f9/0x2660 [ 31.885902] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.886417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.887136] ? __pfx_lock_acquire+0x10/0x10 [ 31.887666] ? __pfx_mmap_region+0x10/0x10 [ 31.888195] ? security_mmap_addr+0x7d/0xa0 [ 31.888731] ? get_unmapped_area+0x1f5/0x3f0 [ 31.889279] do_mmap+0x854/0xf00 [ 31.889715] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.890227] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.890789] ksys_mmap_pgoff+0x3af/0x500 [ 31.891293] do_syscall_64+0x3f/0x90 [ 31.891775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.892426] RIP: 0033:0x7f84ba9a7d82 [ 31.892879] 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 [ 31.895027] RSP: 002b:00007fff58c20188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.895933] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f84ba9a7d82 [ 31.896784] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f84b9de1000 [ 31.897630] RBP: 00007f84b9de1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.898491] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569a0721b20 [ 31.899340] R13: 00007fff58c201a0 R14: 00007fff58c201d0 R15: 00007fff58c20530 [ 31.900194] [ 31.900488] [ 31.900710] Allocated by task 214: [ 31.901137] kasan_save_stack+0x22/0x50 [ 31.901654] kasan_set_track+0x25/0x30 [ 31.902165] __kasan_slab_alloc+0x59/0x70 [ 31.902681] kmem_cache_alloc+0x16b/0x370 [ 31.903194] vm_area_dup+0x20/0x160 [ 31.903650] __split_vma+0x170/0x950 [ 31.904137] split_vma+0xc6/0x110 [ 31.904575] mprotect_fixup+0x8d2/0xb30 [ 31.905076] do_mprotect_pkey+0x87e/0xd40 [ 31.905591] __x64_sys_mprotect+0x78/0xc0 [ 31.906113] do_syscall_64+0x3f/0x90 [ 31.906586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.907227] [ 31.907441] Freed by task 214: [ 31.907842] kasan_save_stack+0x22/0x50 [ 31.908341] kasan_set_track+0x25/0x30 [ 31.908837] kasan_save_free_info+0x2b/0x50 [ 31.909373] __kasan_slab_free+0x10a/0x190 [ 31.909909] kmem_cache_free+0x10d/0x4d0 [ 31.910421] rcu_core+0x8c8/0x2860 [ 31.910867] __do_softirq+0x1b7/0x7d4 [ 31.911357] [ 31.911576] Last potentially related work creation: [ 31.912157] kasan_save_stack+0x22/0x50 [ 31.912656] __kasan_record_aux_stack+0x8e/0xa0 [ 31.913229] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.913891] remove_vma+0x139/0x170 [ 31.914356] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.914918] do_vmi_munmap+0x1f1/0x2b0 [ 31.915401] __vm_munmap+0x138/0x3a0 [ 31.915867] __x64_sys_munmap+0x59/0x80 [ 31.916367] do_syscall_64+0x3f/0x90 [ 31.916847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.917491] [ 31.917704] The buggy address belongs to the object at ffff88801685aae0 [ 31.917704] which belongs to the cache vm_area_struct of size 168 [ 31.919194] The buggy address is located 88 bytes inside of [ 31.919194] freed 168-byte region [ffff88801685aae0, ffff88801685ab88) [ 31.920589] [ 31.920807] The buggy address belongs to the physical page: [ 31.921462] page:00000000d2197a98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1685a [ 31.922588] memcg:ffff88801a05ed01 [ 31.923029] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.923679] page_type: 0xffffffff() [ 31.924136] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.925141] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a05ed01 [ 31.926069] page dumped because: kasan: bad access detected [ 31.926748] [ 31.926965] Memory state around the buggy address: [ 31.927545] ffff88801685aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.928410] ffff88801685aa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.929278] >ffff88801685ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.930142] ^ [ 31.930774] ffff88801685ab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.931644] ffff88801685ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.932495] ================================================================== [ 31.933479] Disabling lock debugging due to kernel taint [ 34.091360] BUG: Bad rss-counter state mm:000000002463cb27 type:MM_FILEPAGES val:33 [ 34.092409] BUG: Bad rss-counter state mm:000000002463cb27 type:MM_ANONPAGES val:22 [ 34.573072] BUG: Bad rss-counter state mm:000000004fcceefe type:MM_FILEPAGES val:33 [ 34.574176] BUG: Bad rss-counter state mm:000000004fcceefe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59640' (ECDSA) to the list of known hosts. 2023/06/20 11:06:33 fuzzer started 2023/06/20 11:06:33 dialing manager at localhost:36067 2023/06/20 11:06:34 checking machine... 2023/06/20 11:06:34 checking revisions... [ 35.311798] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:06:34 testing simple program... [ 35.367929] cgroup: Unknown subsys name 'net' [ 35.411336] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:06:33 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=00007f27f9742ac0 CR3=000000000d6aa000 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=2033333a36303a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a36303a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880144f1100 RCX=ffff8880144f1100 RDX=0000000000070005 RSI=ffff8880144f1100 RDI=ffff8880087b83c0 RBP=ffff8880168b7a28 RSP=ffff8880168b7990 R8 =0000000000070004 R9 =0000000000000000 R10=ffffea0000513c00 R11=000000008080004e R12=ffffea0000513c00 R13=ffff8880144f2200 R14=0000000000070004 R15=ffff8880087b83c0 RIP=ffffffff81809672 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 00007f43936a9900 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=00007ffce6588000 CR3=0000000018046000 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=6720646572637465733a4d41503d706f 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