syzkaller login: [ 30.560283] BUG: Bad rss-counter state mm:0000000073dd8b9e type:MM_FILEPAGES val:33 [ 30.561740] BUG: Bad rss-counter state mm:0000000073dd8b9e type:MM_ANONPAGES val:22 [ 30.729653] ================================================================== [ 30.730555] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.731495] Read of size 8 at addr ffff88801914ba50 by task sshd/219 [ 30.732378] [ 30.732597] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.733480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.734482] Call Trace: [ 30.734799] [ 30.735083] dump_stack_lvl+0x91/0xf0 [ 30.735583] print_report+0xcc/0x620 [ 30.736063] ? __virt_addr_valid+0x102/0x340 [ 30.736643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.737872] kasan_report+0xbe/0xf0 [ 30.738348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738969] vma_interval_tree_remove+0xc75/0xec0 [ 30.739590] vma_prepare+0xc54/0x11a0 [ 30.740096] __split_vma+0x5af/0x950 [ 30.740579] ? __pfx___split_vma+0x10/0x10 [ 30.741116] ? find_held_lock+0x2c/0x110 [ 30.741639] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.742213] ? lock_is_held_type+0x9f/0x120 [ 30.742768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.743385] ? mtree_range_walk+0x632/0x900 [ 30.743948] ? mas_walk+0x5c7/0x7c0 [ 30.744441] do_vmi_munmap+0x1f1/0x2b0 [ 30.744949] mmap_region+0x1f9/0x2660 [ 30.745431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.745948] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.746688] ? __pfx_lock_acquire+0x10/0x10 [ 30.747216] ? __pfx_mmap_region+0x10/0x10 [ 30.747753] ? security_mmap_addr+0x7d/0xa0 [ 30.748316] ? get_unmapped_area+0x1f5/0x3f0 [ 30.748878] do_mmap+0x854/0xf00 [ 30.749322] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.749824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.750417] ksys_mmap_pgoff+0x3af/0x500 [ 30.750942] do_syscall_64+0x3f/0x90 [ 30.751425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.752089] RIP: 0033:0x7f5b3b65fd82 [ 30.752566] 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 [ 30.754748] RSP: 002b:00007ffef4b34608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.755673] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5b3b65fd82 [ 30.756541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5b3aa99000 [ 30.757404] RBP: 00007f5b3aa99000 R08: 0000000000000009 R09: 0000000000001000 [ 30.758252] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc06ef4f70 [ 30.759127] R13: 00007ffef4b34620 R14: 00007ffef4b34650 R15: 00007ffef4b349b0 [ 30.760006] [ 30.760311] [ 30.760530] Allocated by task 212: [ 30.760966] kasan_save_stack+0x22/0x50 [ 30.761478] kasan_set_track+0x25/0x30 [ 30.761993] __kasan_slab_alloc+0x59/0x70 [ 30.762524] kmem_cache_alloc+0x16b/0x370 [ 30.763052] vm_area_dup+0x20/0x160 [ 30.763505] __split_vma+0x170/0x950 [ 30.763975] split_vma+0xc6/0x110 [ 30.764430] mprotect_fixup+0x8d2/0xb30 [ 30.764941] do_mprotect_pkey+0x87e/0xd40 [ 30.765474] __x64_sys_mprotect+0x78/0xc0 [ 30.766003] do_syscall_64+0x3f/0x90 [ 30.766531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767183] [ 30.767407] Freed by task 202: [ 30.767810] kasan_save_stack+0x22/0x50 [ 30.768350] kasan_set_track+0x25/0x30 [ 30.768869] kasan_save_free_info+0x2b/0x50 [ 30.769417] __kasan_slab_free+0x10a/0x190 [ 30.769970] kmem_cache_free+0x10d/0x4d0 [ 30.770507] rcu_core+0x8c8/0x2860 [ 30.770959] __do_softirq+0x1b7/0x7d4 [ 30.771475] [ 30.771696] Last potentially related work creation: [ 30.772304] kasan_save_stack+0x22/0x50 [ 30.772810] __kasan_record_aux_stack+0x8e/0xa0 [ 30.773420] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.774089] remove_vma+0x139/0x170 [ 30.774555] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.775131] do_vmi_munmap+0x1f1/0x2b0 [ 30.775654] __vm_munmap+0x138/0x3a0 [ 30.776129] __x64_sys_munmap+0x59/0x80 [ 30.776655] do_syscall_64+0x3f/0x90 [ 30.777142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.777800] [ 30.778021] The buggy address belongs to the object at ffff88801914b9f8 [ 30.778021] which belongs to the cache vm_area_struct of size 168 [ 30.779512] The buggy address is located 88 bytes inside of [ 30.779512] freed 168-byte region [ffff88801914b9f8, ffff88801914baa0) [ 30.781016] [ 30.781231] The buggy address belongs to the physical page: [ 30.781907] page:00000000b18b274a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1914b [ 30.783023] memcg:ffff88800eb15401 [ 30.783462] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.784134] page_type: 0xffffffff() [ 30.784620] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.785588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb15401 [ 30.786510] page dumped because: kasan: bad access detected [ 30.787182] [ 30.787406] Memory state around the buggy address: [ 30.788010] ffff88801914b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.788909] ffff88801914b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.789800] >ffff88801914ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.790696] ^ [ 30.791417] ffff88801914ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.792319] ffff88801914bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.793196] ================================================================== [ 30.794349] Disabling lock debugging due to kernel taint [ 33.398713] BUG: Bad rss-counter state mm:0000000031e70755 type:MM_FILEPAGES val:33 [ 33.399758] BUG: Bad rss-counter state mm:0000000031e70755 type:MM_ANONPAGES val:22 [ 33.871321] BUG: Bad rss-counter state mm:00000000b36f57c0 type:MM_FILEPAGES val:33 [ 33.872326] BUG: Bad rss-counter state mm:00000000b36f57c0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25319' (ECDSA) to the list of known hosts. 2023/06/20 16:00:00 fuzzer started 2023/06/20 16:00:00 dialing manager at localhost:36067 2023/06/20 16:00:00 checking machine... 2023/06/20 16:00:00 checking revisions... [ 34.509841] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:01 testing simple program... [ 34.557376] cgroup: Unknown subsys name 'net' [ 34.642533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028f9e82 RSI=ffffffff818d554e RDI=ffff8880147cf3d0 RBP=ffff8880147cf428 RSP=ffff8880147cf360 R8 =0000000000000001 R9 =ffff8880147cf410 R10=0000000000038001 R11=00000000000240a4 R12=ffff8880147cf430 R13=ffff8880147cf418 R14=ffff8880147cf411 R15=ffff8880147cf3d0 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007f7d64c30900 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=00007ff3811c2650 CR3=000000000d4d4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0d51444845fed9ff00000000000ae988 XMM05=0e98c028dc09ab9e00000000001329e8 XMM06=dfcdbad4f1609c3700000000001318a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffcdfed8cd8 CR3=00000000096f0000 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=2030303a30303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a30303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000