syzkaller login: [ 30.604467] BUG: Bad rss-counter state mm:000000003fe2f3aa type:MM_FILEPAGES val:33 [ 30.606081] BUG: Bad rss-counter state mm:000000003fe2f3aa type:MM_ANONPAGES val:22 [ 30.786298] ================================================================== [ 30.787242] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.788166] Read of size 8 at addr ffff88801a3bea50 by task sshd/220 [ 30.788934] [ 30.789265] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.790141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.791135] Call Trace: [ 30.791469] [ 30.791756] dump_stack_lvl+0x91/0xf0 [ 30.792247] print_report+0xcc/0x620 [ 30.792731] ? __virt_addr_valid+0x102/0x340 [ 30.793287] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.793913] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794538] kasan_report+0xbe/0xf0 [ 30.795018] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795640] vma_interval_tree_remove+0xc75/0xec0 [ 30.796252] vma_prepare+0xc54/0x11a0 [ 30.796735] __split_vma+0x5af/0x950 [ 30.797207] ? __pfx___split_vma+0x10/0x10 [ 30.797732] ? find_held_lock+0x2c/0x110 [ 30.798252] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.798839] ? lock_is_held_type+0x9f/0x120 [ 30.799372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.799984] ? mtree_range_walk+0x632/0x900 [ 30.800534] ? mas_walk+0x5c7/0x7c0 [ 30.801014] do_vmi_munmap+0x1f1/0x2b0 [ 30.801512] mmap_region+0x1f9/0x2660 [ 30.801995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.802512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.803223] ? __pfx_lock_acquire+0x10/0x10 [ 30.803761] ? __pfx_mmap_region+0x10/0x10 [ 30.804292] ? security_mmap_addr+0x7d/0xa0 [ 30.804849] ? get_unmapped_area+0x1f5/0x3f0 [ 30.805412] do_mmap+0x854/0xf00 [ 30.805852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.806345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.806936] ksys_mmap_pgoff+0x3af/0x500 [ 30.807450] do_syscall_64+0x3f/0x90 [ 30.807936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808579] RIP: 0033:0x7f2e3480dd82 [ 30.809032] 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 [ 30.811191] RSP: 002b:00007ffc4f599068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.812107] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e3480dd82 [ 30.812969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e33c47000 [ 30.813834] RBP: 00007f2e33c47000 R08: 0000000000000009 R09: 0000000000001000 [ 30.814696] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589ee848f70 [ 30.815547] R13: 00007ffc4f599080 R14: 00007ffc4f5990b0 R15: 00007ffc4f599410 [ 30.816396] [ 30.816690] [ 30.816905] Allocated by task 213: [ 30.817333] kasan_save_stack+0x22/0x50 [ 30.817842] kasan_set_track+0x25/0x30 [ 30.818336] __kasan_slab_alloc+0x59/0x70 [ 30.818883] kmem_cache_alloc+0x16b/0x370 [ 30.819401] vm_area_dup+0x20/0x160 [ 30.819856] __split_vma+0x170/0x950 [ 30.820319] split_vma+0xc6/0x110 [ 30.820758] mprotect_fixup+0x8d2/0xb30 [ 30.821261] do_mprotect_pkey+0x87e/0xd40 [ 30.821790] __x64_sys_mprotect+0x78/0xc0 [ 30.822308] do_syscall_64+0x3f/0x90 [ 30.822793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823437] [ 30.823656] Freed by task 213: [ 30.824048] kasan_save_stack+0x22/0x50 [ 30.824549] kasan_set_track+0x25/0x30 [ 30.825042] kasan_save_free_info+0x2b/0x50 [ 30.825575] __kasan_slab_free+0x10a/0x190 [ 30.826102] kmem_cache_free+0x10d/0x4d0 [ 30.826624] rcu_core+0x8c8/0x2860 [ 30.827065] __do_softirq+0x1b7/0x7d4 [ 30.827541] [ 30.827757] Last potentially related work creation: [ 30.828343] kasan_save_stack+0x22/0x50 [ 30.828847] __kasan_record_aux_stack+0x8e/0xa0 [ 30.829416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.830056] remove_vma+0x139/0x170 [ 30.830587] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.831170] do_vmi_munmap+0x1f1/0x2b0 [ 30.831664] __vm_munmap+0x138/0x3a0 [ 30.832134] __x64_sys_munmap+0x59/0x80 [ 30.832627] do_syscall_64+0x3f/0x90 [ 30.833100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.833745] [ 30.833958] The buggy address belongs to the object at ffff88801a3be9f8 [ 30.833958] which belongs to the cache vm_area_struct of size 168 [ 30.835437] The buggy address is located 88 bytes inside of [ 30.835437] freed 168-byte region [ffff88801a3be9f8, ffff88801a3beaa0) [ 30.836833] [ 30.837051] The buggy address belongs to the physical page: [ 30.837714] page:000000005d38656c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3be [ 30.838825] memcg:ffff888019c69501 [ 30.839252] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.839913] page_type: 0xffffffff() [ 30.840365] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.841319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c69501 [ 30.842239] page dumped because: kasan: bad access detected [ 30.842906] [ 30.843122] Memory state around the buggy address: [ 30.843715] ffff88801a3be900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.844579] ffff88801a3be980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.845449] >ffff88801a3bea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.846347] ^ [ 30.847062] ffff88801a3bea80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.847919] ffff88801a3beb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.848776] ================================================================== [ 30.849719] Disabling lock debugging due to kernel taint [ 32.813156] BUG: Bad rss-counter state mm:000000009d9a5109 type:MM_FILEPAGES val:33 [ 32.814342] BUG: Bad rss-counter state mm:000000009d9a5109 type:MM_ANONPAGES val:22 [ 33.165836] BUG: Bad rss-counter state mm:00000000e74a4b29 type:MM_FILEPAGES val:33 [ 33.166842] BUG: Bad rss-counter state mm:00000000e74a4b29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4103' (ECDSA) to the list of known hosts. 2023/06/19 16:51:30 fuzzer started 2023/06/19 16:51:30 dialing manager at localhost:44161 2023/06/19 16:51:30 checking machine... 2023/06/19 16:51:30 checking revisions... [ 33.834502] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:51:31 testing simple program... [ 33.880300] cgroup: Unknown subsys name 'net' [ 33.918343] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:51:30 Registers: info registers vcpu 0 RAX=1ffff11001a87439 RBX=ffff88800d43a198 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d43a1c8 RBP=ffff88800c68b180 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800c68a280 R14=ffffffff8186b9c5 R15=ffff88800caadc00 RIP=ffffffff8184636c 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 0000000000000000 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=00007f8e45821720 CR3=000000000d858000 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=f2caed21554c8ca7e344bd16bfff99cd XMM02=000000000011d908eff9b2d0a8fce9cb XMM03=000000000011d9d82c67c8bc2e329bc3 XMM04=9861f9edc15c22dc00000000000ae988 XMM05=19e9129bd510f2350000000000134328 XMM06=4fda316b135da52b00000000001341b0 XMM07=e042d86d42eb936e00000000001249a0 XMM08=a5ae87751d3d3160000000000011d9d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a138730 RBX=ffff888016968788 RCX=1ffff11001faf886 RDX=dffffc0000000000 RSI=ffff88801a138638 RDI=ffff8880169687b8 RBP=ffff888016419b28 RSP=ffff88801023fca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88801a1385c0 R13=0000000000000000 R14=ffff88800fc6f178 R15=ffff88800fc6f130 RIP=ffffffff81847508 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 00007fde3183f900 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=00007fff9f1d7000 CR3=000000001650a000 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=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