syzkaller login: [ 35.802803] BUG: Bad rss-counter state mm:00000000dcb814b2 type:MM_FILEPAGES val:33 [ 35.803978] BUG: Bad rss-counter state mm:00000000dcb814b2 type:MM_ANONPAGES val:22 [ 35.843736] ================================================================== [ 35.844727] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.845841] Read of size 8 at addr ffff888019a8e798 by task sshd/221 [ 35.846643] [ 35.846882] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.847810] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.848825] Call Trace: [ 35.849160] [ 35.849467] dump_stack_lvl+0x91/0xf0 [ 35.849986] print_report+0xcc/0x620 [ 35.850499] ? __virt_addr_valid+0x102/0x340 [ 35.851091] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.851741] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.852391] kasan_report+0xbe/0xf0 [ 35.852894] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.853546] vma_interval_tree_remove+0xc75/0xec0 [ 35.854185] vma_prepare+0xc54/0x11a0 [ 35.854690] __split_vma+0x5af/0x950 [ 35.855215] ? __pfx___split_vma+0x10/0x10 [ 35.855771] ? find_held_lock+0x2c/0x110 [ 35.856323] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.856925] ? lock_is_held_type+0x9f/0x120 [ 35.857493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.858130] ? mtree_range_walk+0x632/0x900 [ 35.858704] ? mas_walk+0x5c7/0x7c0 [ 35.859212] do_vmi_munmap+0x1f1/0x2b0 [ 35.859730] mmap_region+0x1f9/0x2660 [ 35.860233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.860767] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.861517] ? __pfx_lock_acquire+0x10/0x10 [ 35.862075] ? __pfx_mmap_region+0x10/0x10 [ 35.862632] ? security_mmap_addr+0x7d/0xa0 [ 35.863200] ? get_unmapped_area+0x1f5/0x3f0 [ 35.863772] do_mmap+0x854/0xf00 [ 35.864231] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.864749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.865336] ksys_mmap_pgoff+0x3af/0x500 [ 35.865871] do_syscall_64+0x3f/0x90 [ 35.866368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.867063] RIP: 0033:0x7f7cc18e5d82 [ 35.867541] 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 [ 35.869737] RSP: 002b:00007ffeabd08d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.870676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cc18e5d82 [ 35.871567] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cc0d1f000 [ 35.872445] RBP: 00007f7cc0d1f000 R08: 0000000000000009 R09: 0000000000001000 [ 35.873327] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561298716ec0 [ 35.874206] R13: 00007ffeabd08d90 R14: 00007ffeabd08dc0 R15: 00007ffeabd09120 [ 35.875105] [ 35.875413] [ 35.875641] Allocated by task 214: [ 35.876088] kasan_save_stack+0x22/0x50 [ 35.876625] kasan_set_track+0x25/0x30 [ 35.877142] __kasan_slab_alloc+0x59/0x70 [ 35.877694] kmem_cache_alloc+0x16b/0x370 [ 35.878234] vm_area_dup+0x20/0x160 [ 35.878711] __split_vma+0x170/0x950 [ 35.879236] split_vma+0xc6/0x110 [ 35.879694] mprotect_fixup+0x8d2/0xb30 [ 35.880215] do_mprotect_pkey+0x87e/0xd40 [ 35.880757] __x64_sys_mprotect+0x78/0xc0 [ 35.881296] do_syscall_64+0x3f/0x90 [ 35.881790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.882453] [ 35.882678] Freed by task 214: [ 35.883099] kasan_save_stack+0x22/0x50 [ 35.883621] kasan_set_track+0x25/0x30 [ 35.884133] kasan_save_free_info+0x2b/0x50 [ 35.884679] __kasan_slab_free+0x10a/0x190 [ 35.885230] kmem_cache_free+0x10d/0x4d0 [ 35.885755] rcu_core+0x8c8/0x2860 [ 35.886218] __do_softirq+0x1b7/0x7d4 [ 35.886715] [ 35.886955] Last potentially related work creation: [ 35.887565] kasan_save_stack+0x22/0x50 [ 35.888128] __kasan_record_aux_stack+0x8e/0xa0 [ 35.888756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.889472] remove_vma+0x139/0x170 [ 35.889964] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.890558] do_vmi_munmap+0x1f1/0x2b0 [ 35.891093] __vm_munmap+0x138/0x3a0 [ 35.891599] __x64_sys_munmap+0x59/0x80 [ 35.892135] do_syscall_64+0x3f/0x90 [ 35.892650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.893342] [ 35.893580] Second to last potentially related work creation: [ 35.894308] kasan_save_stack+0x22/0x50 [ 35.894853] __kasan_record_aux_stack+0x8e/0xa0 [ 35.895499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.896197] remove_vma+0x139/0x170 [ 35.896681] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.897283] do_vmi_munmap+0x1f1/0x2b0 [ 35.897805] mmap_region+0x1f9/0x2660 [ 35.898312] do_mmap+0x854/0xf00 [ 35.898780] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.899326] ksys_mmap_pgoff+0x3af/0x500 [ 35.899860] do_syscall_64+0x3f/0x90 [ 35.900360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.901044] [ 35.901269] The buggy address belongs to the object at ffff888019a8e740 [ 35.901269] which belongs to the cache vm_area_struct of size 168 [ 35.902826] The buggy address is located 88 bytes inside of [ 35.902826] freed 168-byte region [ffff888019a8e740, ffff888019a8e7e8) [ 35.904353] [ 35.904584] The buggy address belongs to the physical page: [ 35.905289] page:000000000a08ab8d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a8e [ 35.906441] memcg:ffff88800ed99401 [ 35.906894] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.907669] page_type: 0xffffffff() [ 35.908149] raw: 0100000000000200 ffff88800879fc80 ffffea0000379740 dead000000000007 [ 35.909124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed99401 [ 35.910094] page dumped because: kasan: bad access detected [ 35.910799] [ 35.911039] Memory state around the buggy address: [ 35.911658] ffff888019a8e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.912569] ffff888019a8e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.913482] >ffff888019a8e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 35.914383] ^ [ 35.914918] ffff888019a8e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.915856] ffff888019a8e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.916757] ================================================================== [ 35.917908] Disabling lock debugging due to kernel taint [ 38.330844] BUG: Bad rss-counter state mm:00000000e14e0d5e type:MM_FILEPAGES val:33 [ 38.332106] BUG: Bad rss-counter state mm:00000000e14e0d5e type:MM_ANONPAGES val:22 [ 38.794061] BUG: Bad rss-counter state mm:00000000e59db095 type:MM_FILEPAGES val:33 [ 38.795052] BUG: Bad rss-counter state mm:00000000e59db095 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56022' (ECDSA) to the list of known hosts. 2023/06/19 16:08:17 fuzzer started 2023/06/19 16:08:17 dialing manager at localhost:44161 2023/06/19 16:08:17 checking machine... 2023/06/19 16:08:17 checking revisions... [ 39.427409] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:08:17 testing simple program... [ 39.491004] cgroup: Unknown subsys name 'net' [ 39.553149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ec8f9a8 RCX=0000000000000001 RDX=1ffff11001d91f36 RSI=ffff88800ec8f9a0 RDI=ffff88800ec8f9b0 RBP=ffff88800ec8f9a0 RSP=ffff88800ec8f8b0 R8 =ffffffff8609675a R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800ec8f9f0 R14=ffff88800ec8f9a8 R15=ffff88800ec8f9a8 RIP=ffffffff81130445 RFL=00000246 [---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 00007f16b483b900 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=00007ffc77b9d000 CR3=000000000ddbc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fa529e76000 CR3=000000000ecf2000 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=2037313a38303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a38303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000