syzkaller login: [ 30.358296] BUG: Bad rss-counter state mm:000000002c474db9 type:MM_FILEPAGES val:33 [ 30.359392] BUG: Bad rss-counter state mm:000000002c474db9 type:MM_ANONPAGES val:22 [ 30.532187] ================================================================== [ 30.533560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.534621] Read of size 8 at addr ffff888016f27310 by task sshd/220 [ 30.535456] [ 30.535674] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.536577] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.537588] Call Trace: [ 30.537919] [ 30.538232] dump_stack_lvl+0x91/0xf0 [ 30.538740] print_report+0xcc/0x620 [ 30.539241] ? __virt_addr_valid+0x102/0x340 [ 30.539801] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.540450] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.541115] kasan_report+0xbe/0xf0 [ 30.541599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.542253] vma_interval_tree_remove+0xc75/0xec0 [ 30.542861] vma_prepare+0xc54/0x11a0 [ 30.543354] __split_vma+0x5af/0x950 [ 30.543831] ? __pfx___split_vma+0x10/0x10 [ 30.544377] ? find_held_lock+0x2c/0x110 [ 30.544923] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.545506] ? lock_is_held_type+0x9f/0x120 [ 30.546081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.546693] ? mtree_range_walk+0x632/0x900 [ 30.547269] ? mas_walk+0x5c7/0x7c0 [ 30.547749] do_vmi_munmap+0x1f1/0x2b0 [ 30.548261] mmap_region+0x1f9/0x2660 [ 30.548751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.549284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.550034] ? __pfx_lock_acquire+0x10/0x10 [ 30.550568] ? __pfx_mmap_region+0x10/0x10 [ 30.551127] ? security_mmap_addr+0x7d/0xa0 [ 30.551672] ? get_unmapped_area+0x1f5/0x3f0 [ 30.552246] do_mmap+0x854/0xf00 [ 30.552717] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.553242] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.553808] ksys_mmap_pgoff+0x3af/0x500 [ 30.554359] do_syscall_64+0x3f/0x90 [ 30.554843] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.555516] RIP: 0033:0x7f7502dedd82 [ 30.555996] 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 [ 30.558291] RSP: 002b:00007fff44ef2888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.559230] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7502dedd82 [ 30.560091] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7502227000 [ 30.560975] RBP: 00007f7502227000 R08: 0000000000000009 R09: 0000000000001000 [ 30.561822] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eab41add90 [ 30.562692] R13: 00007fff44ef28a0 R14: 00007fff44ef28d0 R15: 00007fff44ef2c30 [ 30.563628] [ 30.563936] [ 30.564159] Allocated by task 213: [ 30.564585] kasan_save_stack+0x22/0x50 [ 30.565133] kasan_set_track+0x25/0x30 [ 30.565652] __kasan_slab_alloc+0x59/0x70 [ 30.566207] kmem_cache_alloc+0x16b/0x370 [ 30.566751] vm_area_dup+0x20/0x160 [ 30.567233] __split_vma+0x170/0x950 [ 30.567727] split_vma+0xc6/0x110 [ 30.568201] mprotect_fixup+0x8d2/0xb30 [ 30.568741] do_mprotect_pkey+0x87e/0xd40 [ 30.569293] __x64_sys_mprotect+0x78/0xc0 [ 30.569836] do_syscall_64+0x3f/0x90 [ 30.570340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.571022] [ 30.571244] Freed by task 210: [ 30.571637] kasan_save_stack+0x22/0x50 [ 30.572162] kasan_set_track+0x25/0x30 [ 30.572676] kasan_save_free_info+0x2b/0x50 [ 30.573253] __kasan_slab_free+0x10a/0x190 [ 30.573798] kmem_cache_free+0x10d/0x4d0 [ 30.574349] rcu_core+0x8c8/0x2860 [ 30.574807] __do_softirq+0x1b7/0x7d4 [ 30.575347] [ 30.575573] Last potentially related work creation: [ 30.576205] kasan_save_stack+0x22/0x50 [ 30.576758] __kasan_record_aux_stack+0x8e/0xa0 [ 30.577376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.578079] remove_vma+0x139/0x170 [ 30.578552] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.579149] do_vmi_munmap+0x1f1/0x2b0 [ 30.579661] __vm_munmap+0x138/0x3a0 [ 30.580173] __x64_sys_munmap+0x59/0x80 [ 30.580723] do_syscall_64+0x3f/0x90 [ 30.581247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.581922] [ 30.582155] The buggy address belongs to the object at ffff888016f272b8 [ 30.582155] which belongs to the cache vm_area_struct of size 168 [ 30.583704] The buggy address is located 88 bytes inside of [ 30.583704] freed 168-byte region [ffff888016f272b8, ffff888016f27360) [ 30.585258] [ 30.585484] The buggy address belongs to the physical page: [ 30.586178] page:000000004fe9dc13 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f27 [ 30.587327] memcg:ffff88801a10d001 [ 30.587770] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.588459] page_type: 0xffffffff() [ 30.588955] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.589954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a10d001 [ 30.590908] page dumped because: kasan: bad access detected [ 30.591601] [ 30.591822] Memory state around the buggy address: [ 30.592464] ffff888016f27200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.593423] ffff888016f27280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.594331] >ffff888016f27300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.595228] ^ [ 30.595717] ffff888016f27380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.596632] ffff888016f27400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.597567] ================================================================== [ 30.598724] Disabling lock debugging due to kernel taint [ 32.557008] BUG: Bad rss-counter state mm:00000000dee682be type:MM_FILEPAGES val:33 [ 32.558013] BUG: Bad rss-counter state mm:00000000dee682be type:MM_ANONPAGES val:22 [ 33.109641] BUG: Bad rss-counter state mm:00000000333603e9 type:MM_FILEPAGES val:33 [ 33.110831] BUG: Bad rss-counter state mm:00000000333603e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50967' (ECDSA) to the list of known hosts. 2023/06/21 00:23:48 fuzzer started 2023/06/21 00:23:48 dialing manager at localhost:36067 2023/06/21 00:23:48 checking machine... 2023/06/21 00:23:48 checking revisions... [ 33.762221] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:23:48 testing simple program... [ 33.822657] cgroup: Unknown subsys name 'net' [ 33.900143] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:23:48 Registers: info registers vcpu 0 RAX=1ffffffff0c27ed4 RBX=0000000000000001 RCX=ffffffff8613f6a2 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff8613f6a4 RBP=ffff88801033f6f0 RSP=ffff88801033f628 R8 =ffffffff8613f6a6 R9 =ffff88801033f6d8 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88801033f6f8 R13=ffff88801033f6e0 R14=ffff88801033fad0 R15=ffff88801033f698 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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 00007f4418513900 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=00007ffe829be000 CR3=0000000008ed4000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f421423d6e0 CR3=00000000167b8000 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=2037343a33323a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a33323a3030203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000