syzkaller login: [ 30.840145] BUG: Bad rss-counter state mm:0000000048571f8b type:MM_FILEPAGES val:33 [ 30.841610] BUG: Bad rss-counter state mm:0000000048571f8b type:MM_ANONPAGES val:22 [ 30.879122] ================================================================== [ 30.880107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.881030] Read of size 8 at addr ffff888019f4c140 by task sshd/220 [ 30.881789] [ 30.882002] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.882896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.883866] Call Trace: [ 30.884191] [ 30.884476] dump_stack_lvl+0x91/0xf0 [ 30.884961] print_report+0xcc/0x620 [ 30.885451] ? __virt_addr_valid+0x102/0x340 [ 30.886004] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.886638] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.887263] kasan_report+0xbe/0xf0 [ 30.887740] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.888359] vma_interval_tree_remove+0xc75/0xec0 [ 30.888969] vma_prepare+0xc54/0x11a0 [ 30.889449] __split_vma+0x5af/0x950 [ 30.889921] ? __pfx___split_vma+0x10/0x10 [ 30.890463] ? find_held_lock+0x2c/0x110 [ 30.890993] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.891564] ? lock_is_held_type+0x9f/0x120 [ 30.892103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.892702] ? mtree_range_walk+0x632/0x900 [ 30.893262] ? mas_walk+0x5c7/0x7c0 [ 30.893731] do_vmi_munmap+0x1f1/0x2b0 [ 30.894246] mmap_region+0x1f9/0x2660 [ 30.894725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.895240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.895954] ? __pfx_lock_acquire+0x10/0x10 [ 30.896484] ? __pfx_mmap_region+0x10/0x10 [ 30.897014] ? security_mmap_addr+0x7d/0xa0 [ 30.897546] ? get_unmapped_area+0x1f5/0x3f0 [ 30.898093] do_mmap+0x854/0xf00 [ 30.898535] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.899038] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.899607] ksys_mmap_pgoff+0x3af/0x500 [ 30.900107] do_syscall_64+0x3f/0x90 [ 30.900588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901244] RIP: 0033:0x7f7c01da1d82 [ 30.901699] 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 [ 30.903805] RSP: 002b:00007ffcb1e34288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.904711] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c01da1d82 [ 30.905578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c011db000 [ 30.906454] RBP: 00007f7c011db000 R08: 0000000000000009 R09: 0000000000001000 [ 30.907502] R10: 0000000000000812 R11: 0000000000000206 R12: 000055957f308b20 [ 30.908346] R13: 00007ffcb1e342a0 R14: 00007ffcb1e342d0 R15: 00007ffcb1e34630 [ 30.909220] [ 30.909513] [ 30.909733] Allocated by task 213: [ 30.910172] kasan_save_stack+0x22/0x50 [ 30.910684] kasan_set_track+0x25/0x30 [ 30.911189] __kasan_slab_alloc+0x59/0x70 [ 30.911713] kmem_cache_alloc+0x16b/0x370 [ 30.912241] vm_area_dup+0x20/0x160 [ 30.912765] __split_vma+0x170/0x950 [ 30.913265] split_vma+0xc6/0x110 [ 30.913719] mprotect_fixup+0x8d2/0xb30 [ 30.914271] do_mprotect_pkey+0x87e/0xd40 [ 30.914815] __x64_sys_mprotect+0x78/0xc0 [ 30.915366] do_syscall_64+0x3f/0x90 [ 30.915868] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.916544] [ 30.916768] Freed by task 213: [ 30.917183] kasan_save_stack+0x22/0x50 [ 30.917706] kasan_set_track+0x25/0x30 [ 30.918228] kasan_save_free_info+0x2b/0x50 [ 30.918781] __kasan_slab_free+0x10a/0x190 [ 30.919341] kmem_cache_free+0x10d/0x4d0 [ 30.919868] rcu_core+0x8c8/0x2860 [ 30.920329] __do_softirq+0x1b7/0x7d4 [ 30.920826] [ 30.921050] Last potentially related work creation: [ 30.921668] kasan_save_stack+0x22/0x50 [ 30.922200] __kasan_record_aux_stack+0x8e/0xa0 [ 30.922805] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.923468] remove_vma+0x139/0x170 [ 30.923936] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.924517] do_vmi_munmap+0x1f1/0x2b0 [ 30.925024] __vm_munmap+0x138/0x3a0 [ 30.925515] __x64_sys_munmap+0x59/0x80 [ 30.926032] do_syscall_64+0x3f/0x90 [ 30.926554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.927234] [ 30.927459] The buggy address belongs to the object at ffff888019f4c0e8 [ 30.927459] which belongs to the cache vm_area_struct of size 168 [ 30.929037] The buggy address is located 88 bytes inside of [ 30.929037] freed 168-byte region [ffff888019f4c0e8, ffff888019f4c190) [ 30.930565] [ 30.930801] The buggy address belongs to the physical page: [ 30.931521] page:0000000081dc2a3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f4c [ 30.932711] memcg:ffff888019e3a201 [ 30.933176] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.933871] page_type: 0xffffffff() [ 30.934366] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.935344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e3a201 [ 30.936312] page dumped because: kasan: bad access detected [ 30.937031] [ 30.937255] Memory state around the buggy address: [ 30.937889] ffff888019f4c000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.938820] ffff888019f4c080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.939754] >ffff888019f4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.940666] ^ [ 30.941361] ffff888019f4c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.942290] ffff888019f4c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.943149] ================================================================== [ 30.944472] Disabling lock debugging due to kernel taint [ 32.856151] BUG: Bad rss-counter state mm:0000000077b370f6 type:MM_FILEPAGES val:33 [ 32.856989] BUG: Bad rss-counter state mm:0000000077b370f6 type:MM_ANONPAGES val:22 [ 33.377365] BUG: Bad rss-counter state mm:00000000261abde7 type:MM_FILEPAGES val:33 [ 33.378580] BUG: Bad rss-counter state mm:00000000261abde7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16092' (ECDSA) to the list of known hosts. 2023/06/19 14:18:03 fuzzer started 2023/06/19 14:18:03 dialing manager at localhost:44161 2023/06/19 14:18:03 checking machine... 2023/06/19 14:18:03 checking revisions... [ 34.023588] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:18:03 testing simple program... [ 34.073389] cgroup: Unknown subsys name 'net' [ 34.131848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff81c61c84 RDI=ffff8880181e7528 RBP=ffff8880181e7580 RSP=ffff8880181e74b8 R8 =0000000000000001 R9 =ffff8880181e7568 R10=0000000000038001 R11=0000000000020c48 R12=ffff8880181e7588 R13=ffff8880181e7570 R14=ffff8880181e7569 R15=ffff8880181e7528 RIP=ffffffff811306e0 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 00007f7d91c9f700 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=00007fff4dd03000 CR3=00000000141ac000 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=2032303a38313a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38313a3431203931 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f05c0f3d020 CR3=00000000101f8000 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=cb60e80cedfd60ae8e444918ddc095db XMM02=2c67c8bc2e329bc3000000000011d2e8 XMM03=fb795ef6d65770560000000000124010 XMM04=d9f42017b549542b00000000000ae988 XMM05=19e9129bd510f2350000000000133b08 XMM06=5c15a817448d4f210000000000132970 XMM07=e042d86d42eb936e0000000000124290 XMM08=5cef0a532eccd40e000000000011d348 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000