syzkaller login: [ 29.709126] BUG: Bad rss-counter state mm:000000004bef6fa9 type:MM_FILEPAGES val:33 [ 29.710398] BUG: Bad rss-counter state mm:000000004bef6fa9 type:MM_ANONPAGES val:22 [ 29.749200] ================================================================== [ 29.750370] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.751470] Read of size 8 at addr ffff88800e821b38 by task sshd/219 [ 29.752562] [ 29.752796] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.753772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.754793] Call Trace: [ 29.755129] [ 29.755431] dump_stack_lvl+0x91/0xf0 [ 29.755953] print_report+0xcc/0x620 [ 29.756460] ? __virt_addr_valid+0x102/0x340 [ 29.757042] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.757692] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.758344] kasan_report+0xbe/0xf0 [ 29.758845] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.759501] vma_interval_tree_remove+0xc75/0xec0 [ 29.760148] vma_prepare+0xc54/0x11a0 [ 29.760658] __split_vma+0x5af/0x950 [ 29.761151] ? __pfx___split_vma+0x10/0x10 [ 29.761709] ? find_held_lock+0x2c/0x110 [ 29.762263] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.762860] ? lock_is_held_type+0x9f/0x120 [ 29.763423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.764093] ? mtree_range_walk+0x632/0x900 [ 29.764679] ? mas_walk+0x5c7/0x7c0 [ 29.765180] do_vmi_munmap+0x1f1/0x2b0 [ 29.765697] mmap_region+0x1f9/0x2660 [ 29.766214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.766759] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.767520] ? __pfx_lock_acquire+0x10/0x10 [ 29.768108] ? __pfx_mmap_region+0x10/0x10 [ 29.768675] ? security_mmap_addr+0x7d/0xa0 [ 29.769243] ? get_unmapped_area+0x1f5/0x3f0 [ 29.769830] do_mmap+0x854/0xf00 [ 29.770302] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.770833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.771434] ksys_mmap_pgoff+0x3af/0x500 [ 29.771977] do_syscall_64+0x3f/0x90 [ 29.772489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.773179] RIP: 0033:0x7f062bfd7d82 [ 29.773670] 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 [ 29.775988] RSP: 002b:00007fff19ab09e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.776951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f062bfd7d82 [ 29.777853] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f062b411000 [ 29.778757] RBP: 00007f062b411000 R08: 0000000000000009 R09: 0000000000001000 [ 29.779667] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640ca3dfec0 [ 29.780579] R13: 00007fff19ab0a00 R14: 00007fff19ab0a30 R15: 00007fff19ab0d90 [ 29.781487] [ 29.781796] [ 29.782027] Allocated by task 212: [ 29.782482] kasan_save_stack+0x22/0x50 [ 29.783018] kasan_set_track+0x25/0x30 [ 29.783537] __kasan_slab_alloc+0x59/0x70 [ 29.784112] kmem_cache_alloc+0x16b/0x370 [ 29.784667] vm_area_dup+0x20/0x160 [ 29.785149] __split_vma+0x170/0x950 [ 29.785654] split_vma+0xc6/0x110 [ 29.786123] mprotect_fixup+0x8d2/0xb30 [ 29.786660] do_mprotect_pkey+0x87e/0xd40 [ 29.787222] __x64_sys_mprotect+0x78/0xc0 [ 29.787795] do_syscall_64+0x3f/0x90 [ 29.788302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.788990] [ 29.789216] Freed by task 212: [ 29.789630] kasan_save_stack+0x22/0x50 [ 29.790214] kasan_set_track+0x25/0x30 [ 29.790737] kasan_save_free_info+0x2b/0x50 [ 29.791314] __kasan_slab_free+0x10a/0x190 [ 29.791894] kmem_cache_free+0x10d/0x4d0 [ 29.792435] rcu_core+0x8c8/0x2860 [ 29.792908] __do_softirq+0x1b7/0x7d4 [ 29.793414] [ 29.793640] Last potentially related work creation: [ 29.794259] kasan_save_stack+0x22/0x50 [ 29.794796] __kasan_record_aux_stack+0x8e/0xa0 [ 29.795405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.796138] remove_vma+0x139/0x170 [ 29.796632] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.797224] do_vmi_munmap+0x1f1/0x2b0 [ 29.797761] __vm_munmap+0x138/0x3a0 [ 29.798274] __x64_sys_munmap+0x59/0x80 [ 29.798824] do_syscall_64+0x3f/0x90 [ 29.799346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.800076] [ 29.800311] The buggy address belongs to the object at ffff88800e821ae0 [ 29.800311] which belongs to the cache vm_area_struct of size 168 [ 29.801957] The buggy address is located 88 bytes inside of [ 29.801957] freed 168-byte region [ffff88800e821ae0, ffff88800e821b88) [ 29.803514] [ 29.803755] The buggy address belongs to the physical page: [ 29.804485] page:00000000bb5e67ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe821 [ 29.805689] memcg:ffff88800e824f01 [ 29.806166] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.806936] page_type: 0xffffffff() [ 29.807439] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3a80 dead000000000003 [ 29.808482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e824f01 [ 29.809490] page dumped because: kasan: bad access detected [ 29.810193] [ 29.810419] Memory state around the buggy address: [ 29.811045] ffff88800e821a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.811969] ffff88800e821a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.812886] >ffff88800e821b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.813802] ^ [ 29.814446] ffff88800e821b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 29.815361] ffff88800e821c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.816278] ================================================================== [ 29.817274] Disabling lock debugging due to kernel taint [ 32.846793] BUG: Bad rss-counter state mm:00000000beecac77 type:MM_FILEPAGES val:33 [ 32.847997] BUG: Bad rss-counter state mm:00000000beecac77 type:MM_ANONPAGES val:22 [ 33.349345] BUG: Bad rss-counter state mm:000000009b5370ec type:MM_FILEPAGES val:33 [ 33.350521] BUG: Bad rss-counter state mm:000000009b5370ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8787' (ECDSA) to the list of known hosts. 2023/06/19 18:36:16 fuzzer started 2023/06/19 18:36:17 dialing manager at localhost:44161 2023/06/19 18:36:17 checking machine... 2023/06/19 18:36:17 checking revisions... [ 34.081989] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:36:17 testing simple program... [ 34.130799] cgroup: Unknown subsys name 'net' [ 34.182067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=000055df56f6aed0 RCX=0000000000000005 RDX=00000000000005fb RSI=000000000000000a RDI=000055df56f79e45 RBP=00007ffd91f17880 RSP=00007ffd91f17820 R8 =000055df56f79e45 R9 =00007fb714f3cbe0 R10=0000000000000100 R11=0000000000000246 R12=00007fb71498a900 R13=000055df56f79e46 R14=00000000000005fb R15=0000000000000000 RIP=00007fb714df3818 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb71498a900 00000000 00000000 GS =0000 0000000000000000 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=00007ffd91f12000 CR3=000000000e154000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=0000000000000000000000000000ff00 XMM02=ffffffffffffff00ffff000000000000 XMM03=73657909454d4f485f544c5541464544 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffff00ffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f39c2c5a0d0 CR3=0000000009bda000 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=a765c831188b4986c2448fb91693d02b XMM02=ec2efd57dc4c00df000000000011c678 XMM03=20ad36502c23b47f000000000011c748 XMM04=a03950d7459f39f800000000000ae988 XMM05=19e9129bd510f2350000000000133820 XMM06=4fda316b135da52b00000000001336a8 XMM07=e042d86d42eb936e00000000001236b8 XMM08=20ad36502c23b47f000000000011c748 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000