syzkaller login: [ 38.511875] BUG: Bad rss-counter state mm:0000000005a4c1a0 type:MM_FILEPAGES val:33 [ 38.512566] BUG: Bad rss-counter state mm:0000000005a4c1a0 type:MM_ANONPAGES val:22 [ 38.726605] ================================================================== [ 38.727209] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.727790] Read of size 8 at addr ffff88801991c058 by task sshd/224 [ 38.728264] [ 38.728402] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.728984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.729589] Call Trace: [ 38.729821] [ 38.734000] dump_stack_lvl+0x91/0xf0 [ 38.734307] print_report+0xcc/0x620 [ 38.734604] ? __virt_addr_valid+0x102/0x340 [ 38.734957] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.735343] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.735729] kasan_report+0xbe/0xf0 [ 38.736027] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.736410] vma_interval_tree_remove+0xc75/0xec0 [ 38.736780] vma_prepare+0xc54/0x11a0 [ 38.737079] __split_vma+0x5af/0x950 [ 38.737368] ? __pfx___split_vma+0x10/0x10 [ 38.737693] ? find_held_lock+0x2c/0x110 [ 38.738059] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.738414] ? lock_is_held_type+0x9f/0x120 [ 38.738755] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.739148] ? mtree_range_walk+0x632/0x900 [ 38.739501] ? mas_walk+0x5c7/0x7c0 [ 38.739837] do_vmi_munmap+0x1f1/0x2b0 [ 38.740147] mmap_region+0x1f9/0x2660 [ 38.740449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.740771] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.741258] ? __pfx_lock_acquire+0x10/0x10 [ 38.741594] ? __pfx_mmap_region+0x10/0x10 [ 38.742175] ? security_mmap_addr+0x7d/0xa0 [ 38.742507] ? get_unmapped_area+0x1f5/0x3f0 [ 38.742874] do_mmap+0x854/0xf00 [ 38.743177] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.743491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.743868] ksys_mmap_pgoff+0x3af/0x500 [ 38.744185] do_syscall_64+0x3f/0x90 [ 38.744487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.744927] RIP: 0033:0x7fbd79b88d82 [ 38.745229] 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 [ 38.746562] RSP: 002b:00007fffd0eeada8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.747175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd79b88d82 [ 38.747704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd78fc2000 [ 38.748231] RBP: 00007fbd78fc2000 R08: 0000000000000009 R09: 0000000000001000 [ 38.748753] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564563c9bb20 [ 38.749287] R13: 00007fffd0eeadc0 R14: 00007fffd0eeadf0 R15: 00007fffd0eeb150 [ 38.749846] [ 38.750038] [ 38.750175] Allocated by task 215: [ 38.750446] kasan_save_stack+0x22/0x50 [ 38.750763] kasan_set_track+0x25/0x30 [ 38.751074] __kasan_slab_alloc+0x59/0x70 [ 38.751400] kmem_cache_alloc+0x16b/0x370 [ 38.751722] vm_area_dup+0x20/0x160 [ 38.752018] __split_vma+0x170/0x950 [ 38.752311] split_vma+0xc6/0x110 [ 38.752587] mprotect_fixup+0x8d2/0xb30 [ 38.752906] do_mprotect_pkey+0x87e/0xd40 [ 38.753234] __x64_sys_mprotect+0x78/0xc0 [ 38.753565] do_syscall_64+0x3f/0x90 [ 38.753896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.754310] [ 38.754451] Freed by task 13: [ 38.754696] kasan_save_stack+0x22/0x50 [ 38.755042] kasan_set_track+0x25/0x30 [ 38.755352] kasan_save_free_info+0x2b/0x50 [ 38.755688] __kasan_slab_free+0x10a/0x190 [ 38.756071] kmem_cache_free+0x10d/0x4d0 [ 38.756392] rcu_core+0x8c8/0x2860 [ 38.756674] __do_softirq+0x1b7/0x7d4 [ 38.756999] [ 38.757137] Last potentially related work creation: [ 38.757504] kasan_save_stack+0x22/0x50 [ 38.757858] __kasan_record_aux_stack+0x8e/0xa0 [ 38.758267] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.758673] remove_vma+0x139/0x170 [ 38.758991] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.759340] do_vmi_munmap+0x1f1/0x2b0 [ 38.759646] __vm_munmap+0x138/0x3a0 [ 38.759982] __x64_sys_munmap+0x59/0x80 [ 38.760301] do_syscall_64+0x3f/0x90 [ 38.760604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.761039] [ 38.761175] The buggy address belongs to the object at ffff88801991c000 [ 38.761175] which belongs to the cache vm_area_struct of size 168 [ 38.766194] The buggy address is located 88 bytes inside of [ 38.766194] freed 168-byte region [ffff88801991c000, ffff88801991c0a8) [ 38.767069] [ 38.767205] The buggy address belongs to the physical page: [ 38.767614] page:0000000027d7f0ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1991c [ 38.768302] memcg:ffff88801991d001 [ 38.768570] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.769007] page_type: 0xffffffff() [ 38.769289] raw: 0100000000000200 ffff8880087a0c80 ffffea0000589340 0000000000000009 [ 38.773937] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801991d001 [ 38.774525] page dumped because: kasan: bad access detected [ 38.774968] [ 38.775103] Memory state around the buggy address: [ 38.775464] ffff88801991bf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.776039] ffff88801991bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.776574] >ffff88801991c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.777103] ^ [ 38.777552] ffff88801991c080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.778121] ffff88801991c100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.778652] ================================================================== [ 38.779303] Disabling lock debugging due to kernel taint [ 42.881306] BUG: Bad rss-counter state mm:000000001e9eeeb2 type:MM_FILEPAGES val:33 [ 42.882005] BUG: Bad rss-counter state mm:000000001e9eeeb2 type:MM_ANONPAGES val:22 [ 43.357161] BUG: Bad rss-counter state mm:00000000e74c7cbb type:MM_FILEPAGES val:33 [ 43.357918] BUG: Bad rss-counter state mm:00000000e74c7cbb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50603' (ECDSA) to the list of known hosts. 2023/06/21 10:23:32 fuzzer started 2023/06/21 10:23:32 dialing manager at localhost:36067 2023/06/21 10:23:32 checking machine... 2023/06/21 10:23:32 checking revisions... [ 44.200323] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:23:32 testing simple program... [ 44.262514] cgroup: Unknown subsys name 'net' [ 44.344182] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:23:32 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=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 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=00007f0fdf6d2328 CR3=0000000005482000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fc4062ad1b0 CR3=000000000d7b4000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=097b99212e35e08800000000001344a0 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=7d063c38ddca8e9200000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000