syzkaller login: [ 32.514369] BUG: Bad rss-counter state mm:00000000c0d7d9ac type:MM_FILEPAGES val:33 [ 32.515560] BUG: Bad rss-counter state mm:00000000c0d7d9ac type:MM_ANONPAGES val:22 [ 32.674512] ================================================================== [ 32.675627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.676618] Read of size 8 at addr ffff888019dce968 by task sshd/219 [ 32.677492] [ 32.677713] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.678565] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.679557] Call Trace: [ 32.679874] [ 32.680165] dump_stack_lvl+0x91/0xf0 [ 32.680657] print_report+0xcc/0x620 [ 32.681140] ? __virt_addr_valid+0x102/0x340 [ 32.681697] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.682313] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.682934] kasan_report+0xbe/0xf0 [ 32.683422] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.684040] vma_interval_tree_remove+0xc75/0xec0 [ 32.684633] vma_prepare+0xc54/0x11a0 [ 32.685111] __split_vma+0x5af/0x950 [ 32.685577] ? __pfx___split_vma+0x10/0x10 [ 32.686103] ? find_held_lock+0x2c/0x110 [ 32.686616] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.687200] ? lock_is_held_type+0x9f/0x120 [ 32.687734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.688336] ? mtree_range_walk+0x632/0x900 [ 32.688877] ? mas_walk+0x5c7/0x7c0 [ 32.689349] do_vmi_munmap+0x1f1/0x2b0 [ 32.689835] mmap_region+0x1f9/0x2660 [ 32.690311] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.690823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.691544] ? __pfx_lock_acquire+0x10/0x10 [ 32.692077] ? __pfx_mmap_region+0x10/0x10 [ 32.692599] ? security_mmap_addr+0x7d/0xa0 [ 32.693137] ? get_unmapped_area+0x1f5/0x3f0 [ 32.693714] do_mmap+0x854/0xf00 [ 32.694176] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.694696] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.695289] ksys_mmap_pgoff+0x3af/0x500 [ 32.695811] do_syscall_64+0x3f/0x90 [ 32.696324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.696991] RIP: 0033:0x7fa515822d82 [ 32.697462] 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 [ 32.699666] RSP: 002b:00007ffc516f9c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.700597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa515822d82 [ 32.701473] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa514c5c000 [ 32.702342] RBP: 00007fa514c5c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.703218] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562fd7f92f70 [ 32.704074] R13: 00007ffc516f9c90 R14: 00007ffc516f9cc0 R15: 00007ffc516fa020 [ 32.704952] [ 32.705261] [ 32.705482] Allocated by task 212: [ 32.705921] kasan_save_stack+0x22/0x50 [ 32.706432] kasan_set_track+0x25/0x30 [ 32.706940] __kasan_slab_alloc+0x59/0x70 [ 32.707487] kmem_cache_alloc+0x16b/0x370 [ 32.708010] vm_area_dup+0x20/0x160 [ 32.708480] __split_vma+0x170/0x950 [ 32.708947] split_vma+0xc6/0x110 [ 32.709389] mprotect_fixup+0x8d2/0xb30 [ 32.709906] do_mprotect_pkey+0x87e/0xd40 [ 32.710436] __x64_sys_mprotect+0x78/0xc0 [ 32.710964] do_syscall_64+0x3f/0x90 [ 32.711477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.712133] [ 32.712352] Freed by task 212: [ 32.712753] kasan_save_stack+0x22/0x50 [ 32.713274] kasan_set_track+0x25/0x30 [ 32.713769] kasan_save_free_info+0x2b/0x50 [ 32.714301] __kasan_slab_free+0x10a/0x190 [ 32.714841] kmem_cache_free+0x10d/0x4d0 [ 32.715376] rcu_core+0x8c8/0x2860 [ 32.715841] __do_softirq+0x1b7/0x7d4 [ 32.716333] [ 32.716552] Last potentially related work creation: [ 32.717159] kasan_save_stack+0x22/0x50 [ 32.717678] __kasan_record_aux_stack+0x8e/0xa0 [ 32.718266] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.718917] remove_vma+0x139/0x170 [ 32.719393] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.719970] do_vmi_munmap+0x1f1/0x2b0 [ 32.720458] __vm_munmap+0x138/0x3a0 [ 32.720937] __x64_sys_munmap+0x59/0x80 [ 32.721446] do_syscall_64+0x3f/0x90 [ 32.721920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.722568] [ 32.722786] The buggy address belongs to the object at ffff888019dce910 [ 32.722786] which belongs to the cache vm_area_struct of size 168 [ 32.724276] The buggy address is located 88 bytes inside of [ 32.724276] freed 168-byte region [ffff888019dce910, ffff888019dce9b8) [ 32.725709] [ 32.725928] The buggy address belongs to the physical page: [ 32.726597] page:00000000c8090c3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dce [ 32.727741] memcg:ffff888008f3cf01 [ 32.728174] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.728821] page_type: 0xffffffff() [ 32.729310] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.730249] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888008f3cf01 [ 32.731179] page dumped because: kasan: bad access detected [ 32.731856] [ 32.732075] Memory state around the buggy address: [ 32.732673] ffff888019dce800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.733539] ffff888019dce880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.734407] >ffff888019dce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.735267] ^ [ 32.736057] ffff888019dce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.736926] ffff888019dcea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.737799] ================================================================== [ 32.738859] Disabling lock debugging due to kernel taint [ 34.336854] BUG: Bad rss-counter state mm:0000000098addbd4 type:MM_FILEPAGES val:33 [ 34.337681] BUG: Bad rss-counter state mm:0000000098addbd4 type:MM_ANONPAGES val:22 [ 34.699004] BUG: Bad rss-counter state mm:0000000085e3b21e type:MM_FILEPAGES val:33 [ 34.699732] BUG: Bad rss-counter state mm:0000000085e3b21e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25999' (ECDSA) to the list of known hosts. 2023/06/19 22:29:18 fuzzer started 2023/06/19 22:29:18 dialing manager at localhost:44161 2023/06/19 22:29:18 checking machine... 2023/06/19 22:29:18 checking revisions... [ 35.285808] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:29:18 testing simple program... [ 35.328011] cgroup: Unknown subsys name 'net' [ 35.367193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:29:16 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=ffffffff815d9739 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88806ce34b60 RSP=ffff88806ce09d60 R8 =0000000000000000 R9 =ffffed100d9c72a0 R10=ffff88806ce39503 R11=0000000000000001 R12=ffff88806ce39500 R13=ffff88806ce39518 R14=0000000000000000 R15=ffff88800e5e51c0 RIP=ffffffff814c0388 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 00007f3fb4202900 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=00007f3fb41e1020 CR3=0000000017772000 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=ffffffff810bd033 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57901 RSI=ffff888008e57970 RDI=ffff888008e57970 RBP=ffff888008e579d0 RSP=ffff888008e578b8 R8 =ffffffff8609675a R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000006097 R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e57978 R15=ffff888008e57978 RIP=ffffffff81131041 RFL=00000202 [-------] 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 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=00007f921a4502e0 CR3=000000000d884000 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=2037313a39323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000