syzkaller login: [ 30.809248] BUG: Bad rss-counter state mm:00000000d2f13849 type:MM_FILEPAGES val:33 [ 30.810441] BUG: Bad rss-counter state mm:00000000d2f13849 type:MM_ANONPAGES val:22 [ 30.854237] ================================================================== [ 30.855139] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.856073] Read of size 8 at addr ffff88800c9ce968 by task sshd/220 [ 30.857012] [ 30.857230] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.858082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.859075] Call Trace: [ 30.859396] [ 30.859681] dump_stack_lvl+0x91/0xf0 [ 30.860204] print_report+0xcc/0x620 [ 30.860712] ? __virt_addr_valid+0x102/0x340 [ 30.861266] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.861900] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.862513] kasan_report+0xbe/0xf0 [ 30.862989] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.863627] vma_interval_tree_remove+0xc75/0xec0 [ 30.864278] vma_prepare+0xc54/0x11a0 [ 30.864783] __split_vma+0x5af/0x950 [ 30.865276] ? __pfx___split_vma+0x10/0x10 [ 30.865825] ? find_held_lock+0x2c/0x110 [ 30.866376] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.866966] ? lock_is_held_type+0x9f/0x120 [ 30.867541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.868196] ? mtree_range_walk+0x632/0x900 [ 30.868774] ? mas_walk+0x5c7/0x7c0 [ 30.869270] do_vmi_munmap+0x1f1/0x2b0 [ 30.869786] mmap_region+0x1f9/0x2660 [ 30.870299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.870837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871593] ? __pfx_lock_acquire+0x10/0x10 [ 30.872131] ? __pfx_mmap_region+0x10/0x10 [ 30.872664] ? security_mmap_addr+0x7d/0xa0 [ 30.873195] ? get_unmapped_area+0x1f5/0x3f0 [ 30.873738] do_mmap+0x854/0xf00 [ 30.874171] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.874662] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.875224] ksys_mmap_pgoff+0x3af/0x500 [ 30.875729] do_syscall_64+0x3f/0x90 [ 30.876230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.876876] RIP: 0033:0x7eff324c6d82 [ 30.877331] 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 [ 30.879466] RSP: 002b:00007ffe2a3ac2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.880384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff324c6d82 [ 30.881243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff31900000 [ 30.882096] RBP: 00007eff31900000 R08: 0000000000000009 R09: 0000000000001000 [ 30.882961] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d1a079b20 [ 30.883820] R13: 00007ffe2a3ac2c0 R14: 00007ffe2a3ac2f0 R15: 00007ffe2a3ac650 [ 30.884692] [ 30.884983] [ 30.885196] Allocated by task 213: [ 30.885626] kasan_save_stack+0x22/0x50 [ 30.886132] kasan_set_track+0x25/0x30 [ 30.886623] __kasan_slab_alloc+0x59/0x70 [ 30.887154] kmem_cache_alloc+0x16b/0x370 [ 30.887675] vm_area_dup+0x20/0x160 [ 30.888146] __split_vma+0x170/0x950 [ 30.888630] split_vma+0xc6/0x110 [ 30.889079] mprotect_fixup+0x8d2/0xb30 [ 30.889594] do_mprotect_pkey+0x87e/0xd40 [ 30.890138] __x64_sys_mprotect+0x78/0xc0 [ 30.890675] do_syscall_64+0x3f/0x90 [ 30.891175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891839] [ 30.892063] Freed by task 213: [ 30.892481] kasan_save_stack+0x22/0x50 [ 30.892999] kasan_set_track+0x25/0x30 [ 30.893510] kasan_save_free_info+0x2b/0x50 [ 30.894066] __kasan_slab_free+0x10a/0x190 [ 30.894616] kmem_cache_free+0x10d/0x4d0 [ 30.895150] rcu_core+0x8c8/0x2860 [ 30.895726] __do_softirq+0x1b7/0x7d4 [ 30.896245] [ 30.896462] Last potentially related work creation: [ 30.897072] kasan_save_stack+0x22/0x50 [ 30.897599] __kasan_record_aux_stack+0x8e/0xa0 [ 30.898190] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.898855] remove_vma+0x139/0x170 [ 30.899320] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.899898] do_vmi_munmap+0x1f1/0x2b0 [ 30.900407] __vm_munmap+0x138/0x3a0 [ 30.900889] __x64_sys_munmap+0x59/0x80 [ 30.901410] do_syscall_64+0x3f/0x90 [ 30.901903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.902574] [ 30.902792] The buggy address belongs to the object at ffff88800c9ce910 [ 30.902792] which belongs to the cache vm_area_struct of size 168 [ 30.904329] The buggy address is located 88 bytes inside of [ 30.904329] freed 168-byte region [ffff88800c9ce910, ffff88800c9ce9b8) [ 30.905784] [ 30.906009] The buggy address belongs to the physical page: [ 30.906698] page:0000000008df5002 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9ce [ 30.907818] memcg:ffff888019e1aa01 [ 30.908289] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.908964] page_type: 0xffffffff() [ 30.909433] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.910389] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e1aa01 [ 30.911344] page dumped because: kasan: bad access detected [ 30.912038] [ 30.912269] Memory state around the buggy address: [ 30.912879] ffff88800c9ce800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.913785] ffff88800c9ce880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.914677] >ffff88800c9ce900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.915570] ^ [ 30.916422] ffff88800c9ce980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.917307] ffff88800c9cea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.918184] ================================================================== [ 30.919134] Disabling lock debugging due to kernel taint [ 33.587755] BUG: Bad rss-counter state mm:00000000b9c30f4b type:MM_FILEPAGES val:33 [ 33.588772] BUG: Bad rss-counter state mm:00000000b9c30f4b type:MM_ANONPAGES val:22 [ 34.051187] BUG: Bad rss-counter state mm:00000000ebd3ec08 type:MM_FILEPAGES val:33 [ 34.052167] BUG: Bad rss-counter state mm:00000000ebd3ec08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31849' (ECDSA) to the list of known hosts. 2023/06/21 06:02:23 fuzzer started 2023/06/21 06:02:23 dialing manager at localhost:36067 2023/06/21 06:02:23 checking machine... 2023/06/21 06:02:23 checking revisions... [ 34.693355] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:02:23 testing simple program... [ 34.736436] cgroup: Unknown subsys name 'net' [ 34.799903] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:02:23 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88800f65fc60 RSP=ffff88800f65fb90 R8 =0000000000000001 R9 =ffffed1001ecbf7e R10=ffff88800f65fbf7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f16fb679900 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=00007ffc0c312000 CR3=0000000009cc2000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=62207473756d20736d65746920656572 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=00000000000000810000363532616873 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=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=00007f1a50656a80 CR3=000000000ec22000 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=2032323a32303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a32303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000