syzkaller login: [ 50.306110] BUG: Bad rss-counter state mm:00000000fa6cb04e type:MM_FILEPAGES val:33 [ 50.307152] BUG: Bad rss-counter state mm:00000000fa6cb04e type:MM_ANONPAGES val:22 [ 50.473777] ================================================================== [ 50.474736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.475730] Read of size 8 at addr ffff88800de79310 by task sshd/220 [ 50.476563] [ 50.476863] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.477767] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.478781] Call Trace: [ 50.479122] [ 50.479422] dump_stack_lvl+0x91/0xf0 [ 50.479958] print_report+0xcc/0x620 [ 50.480471] ? __virt_addr_valid+0x102/0x340 [ 50.481054] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.481709] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.482357] kasan_report+0xbe/0xf0 [ 50.482876] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.483544] vma_interval_tree_remove+0xc75/0xec0 [ 50.484208] vma_prepare+0xc54/0x11a0 [ 50.484725] __split_vma+0x5af/0x950 [ 50.485242] ? __pfx___split_vma+0x10/0x10 [ 50.485815] ? find_held_lock+0x2c/0x110 [ 50.486381] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.486989] ? lock_is_held_type+0x9f/0x120 [ 50.487572] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.488230] ? mtree_range_walk+0x632/0x900 [ 50.488829] ? mas_walk+0x5c7/0x7c0 [ 50.489342] do_vmi_munmap+0x1f1/0x2b0 [ 50.489871] mmap_region+0x1f9/0x2660 [ 50.490397] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.490943] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.491719] ? __pfx_lock_acquire+0x10/0x10 [ 50.492319] ? __pfx_mmap_region+0x10/0x10 [ 50.492895] ? security_mmap_addr+0x7d/0xa0 [ 50.493475] ? get_unmapped_area+0x1f5/0x3f0 [ 50.494071] do_mmap+0x854/0xf00 [ 50.494616] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.495174] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.495931] ksys_mmap_pgoff+0x3af/0x500 [ 50.496575] do_syscall_64+0x3f/0x90 [ 50.497098] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.497796] RIP: 0033:0x7f9dd928bd82 [ 50.498295] 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 [ 50.500595] RSP: 002b:00007ffdf645d2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.501563] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dd928bd82 [ 50.502460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dd86c5000 [ 50.503353] RBP: 00007f9dd86c5000 R08: 0000000000000009 R09: 0000000000001000 [ 50.504269] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b264d13ec0 [ 50.505165] R13: 00007ffdf645d2f0 R14: 00007ffdf645d320 R15: 00007ffdf645d680 [ 50.506071] [ 50.506380] [ 50.506612] Allocated by task 213: [ 50.507070] kasan_save_stack+0x22/0x50 [ 50.507612] kasan_set_track+0x25/0x30 [ 50.508131] __kasan_slab_alloc+0x59/0x70 [ 50.508648] kmem_cache_alloc+0x16b/0x370 [ 50.509210] vm_area_dup+0x20/0x160 [ 50.509705] __split_vma+0x170/0x950 [ 50.510213] split_vma+0xc6/0x110 [ 50.510698] mprotect_fixup+0x8d2/0xb30 [ 50.511244] do_mprotect_pkey+0x87e/0xd40 [ 50.511815] __x64_sys_mprotect+0x78/0xc0 [ 50.512398] do_syscall_64+0x3f/0x90 [ 50.512917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.513609] [ 50.513847] Freed by task 213: [ 50.514273] kasan_save_stack+0x22/0x50 [ 50.514827] kasan_set_track+0x25/0x30 [ 50.515345] kasan_save_free_info+0x2b/0x50 [ 50.515906] __kasan_slab_free+0x10a/0x190 [ 50.516474] kmem_cache_free+0x10d/0x4d0 [ 50.517020] rcu_core+0x8c8/0x2860 [ 50.517488] __do_softirq+0x1b7/0x7d4 [ 50.517988] [ 50.518214] Last potentially related work creation: [ 50.518829] kasan_save_stack+0x22/0x50 [ 50.519363] __kasan_record_aux_stack+0x8e/0xa0 [ 50.519984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.520667] remove_vma+0x139/0x170 [ 50.521165] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.521751] do_vmi_munmap+0x1f1/0x2b0 [ 50.522261] __vm_munmap+0x138/0x3a0 [ 50.522756] __x64_sys_munmap+0x59/0x80 [ 50.523285] do_syscall_64+0x3f/0x90 [ 50.523781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.524466] [ 50.524694] The buggy address belongs to the object at ffff88800de792b8 [ 50.524694] which belongs to the cache vm_area_struct of size 168 [ 50.526264] The buggy address is located 88 bytes inside of [ 50.526264] freed 168-byte region [ffff88800de792b8, ffff88800de79360) [ 50.527744] [ 50.527988] The buggy address belongs to the physical page: [ 50.528677] page:00000000c1d2b2ec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde79 [ 50.529820] memcg:ffff8880097d1f01 [ 50.530279] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.530962] page_type: 0xffffffff() [ 50.531437] raw: 0100000000000200 ffff88800879fc80 ffffea000056ee40 dead000000000006 [ 50.532418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d1f01 [ 50.533378] page dumped because: kasan: bad access detected [ 50.534077] [ 50.534303] Memory state around the buggy address: [ 50.534920] ffff88800de79200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 50.535823] ffff88800de79280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 50.536737] >ffff88800de79300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 50.537634] ^ [ 50.538125] ffff88800de79380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 50.539042] ffff88800de79400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 50.539946] ================================================================== [ 50.541088] Disabling lock debugging due to kernel taint [ 51.892733] BUG: Bad rss-counter state mm:000000009db0d81b type:MM_FILEPAGES val:33 [ 51.893284] BUG: Bad rss-counter state mm:000000009db0d81b type:MM_ANONPAGES val:22 [ 52.213317] BUG: Bad rss-counter state mm:00000000b809e5c5 type:MM_FILEPAGES val:33 [ 52.214408] BUG: Bad rss-counter state mm:00000000b809e5c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10610' (ECDSA) to the list of known hosts. 2023/06/20 00:26:30 fuzzer started 2023/06/20 00:26:31 dialing manager at localhost:44161 2023/06/20 00:26:31 checking machine... 2023/06/20 00:26:31 checking revisions... [ 52.849396] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:26:31 testing simple program... [ 52.905553] cgroup: Unknown subsys name 'net' [ 52.970885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:26:11 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffc43b97b58 CR3=0000000005482000 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=00007f811f364510000056316628d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000ec095198 RBX=0000000009fcbdcd RCX=ffff88800f2dee58 RDX=0000000000000011 RSI=0000000000000010 RDI=000000006c89542a RBP=0000000000000000 RSP=ffff88800f2deda8 R8 =000000007f7ffd6e R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f2dee10 R15=0000000000000011 RIP=ffffffff82270ee2 RFL=00000a92 [-OS-A--] 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 00007f065a40a900 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=00007f065a3d4008 CR3=0000000016716000 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=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