syzkaller login: [ 38.714012] BUG: Bad rss-counter state mm:00000000b55e8478 type:MM_FILEPAGES val:33 [ 38.714802] BUG: Bad rss-counter state mm:00000000b55e8478 type:MM_ANONPAGES val:22 [ 38.748421] ================================================================== [ 38.749149] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.749804] Read of size 8 at addr ffff88801937e880 by task sshd/226 [ 38.750466] [ 38.750648] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.751298] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.751997] Call Trace: [ 38.752205] [ 38.752389] dump_stack_lvl+0x91/0xf0 [ 38.752710] print_report+0xcc/0x620 [ 38.753381] ? __virt_addr_valid+0x102/0x340 [ 38.753794] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.754209] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.754631] kasan_report+0xbe/0xf0 [ 38.755001] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.755450] vma_interval_tree_remove+0xc75/0xec0 [ 38.755862] vma_prepare+0xc54/0x11a0 [ 38.756173] __split_vma+0x5af/0x950 [ 38.756478] ? __pfx___split_vma+0x10/0x10 [ 38.756837] ? find_held_lock+0x2c/0x110 [ 38.757183] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.757551] ? lock_is_held_type+0x9f/0x120 [ 38.757907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.758299] ? mtree_range_walk+0x632/0x900 [ 38.758660] ? mas_walk+0x5c7/0x7c0 [ 38.759033] do_vmi_munmap+0x1f1/0x2b0 [ 38.759378] mmap_region+0x1f9/0x2660 [ 38.759686] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.760029] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.760516] ? __pfx_lock_acquire+0x10/0x10 [ 38.760910] ? __pfx_mmap_region+0x10/0x10 [ 38.761312] ? security_mmap_addr+0x7d/0xa0 [ 38.761709] ? get_unmapped_area+0x1f5/0x3f0 [ 38.762078] do_mmap+0x854/0xf00 [ 38.762376] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.762792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.763187] ksys_mmap_pgoff+0x3af/0x500 [ 38.763556] do_syscall_64+0x3f/0x90 [ 38.763924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.764382] RIP: 0033:0x7f880e2b4d82 [ 38.764737] 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 [ 38.766186] RSP: 002b:00007ffc5ef041d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.766827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f880e2b4d82 [ 38.767469] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f880d6ee000 [ 38.768092] RBP: 00007f880d6ee000 R08: 0000000000000009 R09: 0000000000001000 [ 38.768706] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556573434ec0 [ 38.769283] R13: 00007ffc5ef041f0 R14: 00007ffc5ef04220 R15: 00007ffc5ef04580 [ 38.769928] [ 38.770151] [ 38.770311] Allocated by task 219: [ 38.770598] kasan_save_stack+0x22/0x50 [ 38.770945] kasan_set_track+0x25/0x30 [ 38.771271] __kasan_slab_alloc+0x59/0x70 [ 38.771630] kmem_cache_alloc+0x16b/0x370 [ 38.771971] vm_area_dup+0x20/0x160 [ 38.772273] __split_vma+0x170/0x950 [ 38.772629] split_vma+0xc6/0x110 [ 38.772969] mprotect_fixup+0x8d2/0xb30 [ 38.773300] do_mprotect_pkey+0x87e/0xd40 [ 38.773658] __x64_sys_mprotect+0x78/0xc0 [ 38.774023] do_syscall_64+0x3f/0x90 [ 38.774370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.774834] [ 38.775035] Freed by task 19: [ 38.775303] kasan_save_stack+0x22/0x50 [ 38.775653] kasan_set_track+0x25/0x30 [ 38.776004] kasan_save_free_info+0x2b/0x50 [ 38.776376] __kasan_slab_free+0x10a/0x190 [ 38.776779] kmem_cache_free+0x10d/0x4d0 [ 38.777133] rcu_core+0x8c8/0x2860 [ 38.777441] __do_softirq+0x1b7/0x7d4 [ 38.777790] [ 38.777943] Last potentially related work creation: [ 38.778351] kasan_save_stack+0x22/0x50 [ 38.778700] __kasan_record_aux_stack+0x8e/0xa0 [ 38.779087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.779526] remove_vma+0x139/0x170 [ 38.779850] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.780236] do_vmi_munmap+0x1f1/0x2b0 [ 38.780577] __vm_munmap+0x138/0x3a0 [ 38.780902] __x64_sys_munmap+0x59/0x80 [ 38.781264] do_syscall_64+0x3f/0x90 [ 38.781629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.782103] [ 38.782254] The buggy address belongs to the object at ffff88801937e828 [ 38.782254] which belongs to the cache vm_area_struct of size 168 [ 38.783299] The buggy address is located 88 bytes inside of [ 38.783299] freed 168-byte region [ffff88801937e828, ffff88801937e8d0) [ 38.784233] [ 38.784375] The buggy address belongs to the physical page: [ 38.784833] page:000000007c57d25a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1937e [ 38.785595] memcg:ffff88800d595401 [ 38.785891] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.786354] page_type: 0xffffffff() [ 38.786717] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.787430] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d595401 [ 38.788041] page dumped because: kasan: bad access detected [ 38.788496] [ 38.788649] Memory state around the buggy address: [ 38.789121] ffff88801937e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 38.789718] ffff88801937e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.790299] >ffff88801937e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.790911] ^ [ 38.791200] ffff88801937e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.791784] ffff88801937e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 38.792339] ================================================================== [ 38.793152] Disabling lock debugging due to kernel taint [ 40.647392] BUG: Bad rss-counter state mm:00000000bb7db85c type:MM_FILEPAGES val:33 [ 40.648097] BUG: Bad rss-counter state mm:00000000bb7db85c type:MM_ANONPAGES val:22 [ 40.946137] BUG: Bad rss-counter state mm:000000006e3bc607 type:MM_FILEPAGES val:33 [ 40.947081] BUG: Bad rss-counter state mm:000000006e3bc607 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37347' (ECDSA) to the list of known hosts. 2023/06/21 09:00:11 fuzzer started 2023/06/21 09:00:11 dialing manager at localhost:36067 2023/06/21 09:00:11 checking machine... 2023/06/21 09:00:11 checking revisions... [ 41.565296] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:00:11 testing simple program... [ 41.604282] cgroup: Unknown subsys name 'net' [ 41.637694] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:00:11 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=1ffff11002b24f16 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888015927880 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180f09a RFL=00000286 [--S--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 00007fd8d22c5900 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=00007ffce06cd000 CR3=000000000d56e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007ffea5876268 CR3=000000000e2e8000 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=2030313a30303a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a30303a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000