syzkaller login: [ 31.491717] BUG: Bad rss-counter state mm:0000000070994fc9 type:MM_FILEPAGES val:33 [ 31.492476] BUG: Bad rss-counter state mm:0000000070994fc9 type:MM_ANONPAGES val:22 [ 31.523510] ================================================================== [ 31.524294] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.524995] Read of size 8 at addr ffff88800e0763f8 by task sshd/220 [ 31.525585] [ 31.525745] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.526366] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.527280] Call Trace: [ 31.527507] [ 31.527740] dump_stack_lvl+0x91/0xf0 [ 31.528115] print_report+0xcc/0x620 [ 31.528474] ? __virt_addr_valid+0x102/0x340 [ 31.528898] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529394] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.529849] kasan_report+0xbe/0xf0 [ 31.530196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.530653] vma_interval_tree_remove+0xc75/0xec0 [ 31.531084] vma_prepare+0xc54/0x11a0 [ 31.531435] __split_vma+0x5af/0x950 [ 31.531776] ? __pfx___split_vma+0x10/0x10 [ 31.532203] ? find_held_lock+0x2c/0x110 [ 31.532576] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.532975] ? lock_is_held_type+0x9f/0x120 [ 31.533352] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.533781] ? mtree_range_walk+0x632/0x900 [ 31.534174] ? mas_walk+0x5c7/0x7c0 [ 31.534520] do_vmi_munmap+0x1f1/0x2b0 [ 31.534876] mmap_region+0x1f9/0x2660 [ 31.535216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.535591] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.536118] ? __pfx_lock_acquire+0x10/0x10 [ 31.536499] ? __pfx_mmap_region+0x10/0x10 [ 31.536879] ? security_mmap_addr+0x7d/0xa0 [ 31.537258] ? get_unmapped_area+0x1f5/0x3f0 [ 31.537648] do_mmap+0x854/0xf00 [ 31.537969] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.538327] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.538725] ksys_mmap_pgoff+0x3af/0x500 [ 31.539088] do_syscall_64+0x3f/0x90 [ 31.539435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.539931] RIP: 0033:0x7f5e56511d82 [ 31.540257] 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 [ 31.541749] RSP: 002b:00007ffe403a0528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.542385] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e56511d82 [ 31.542991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e5594b000 [ 31.543594] RBP: 00007f5e5594b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.544213] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed6e4aef70 [ 31.544805] R13: 00007ffe403a0540 R14: 00007ffe403a0570 R15: 00007ffe403a08d0 [ 31.545413] [ 31.545621] [ 31.545767] Allocated by task 213: [ 31.546061] kasan_save_stack+0x22/0x50 [ 31.546422] kasan_set_track+0x25/0x30 [ 31.546759] __kasan_slab_alloc+0x59/0x70 [ 31.547124] kmem_cache_alloc+0x16b/0x370 [ 31.547468] vm_area_dup+0x20/0x160 [ 31.547778] __split_vma+0x170/0x950 [ 31.548136] split_vma+0xc6/0x110 [ 31.548454] mprotect_fixup+0x8d2/0xb30 [ 31.548790] do_mprotect_pkey+0x87e/0xd40 [ 31.549152] __x64_sys_mprotect+0x78/0xc0 [ 31.549516] do_syscall_64+0x3f/0x90 [ 31.549845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550305] [ 31.550459] Freed by task 213: [ 31.550737] kasan_save_stack+0x22/0x50 [ 31.551090] kasan_set_track+0x25/0x30 [ 31.551435] kasan_save_free_info+0x2b/0x50 [ 31.551800] __kasan_slab_free+0x10a/0x190 [ 31.552212] kmem_cache_free+0x10d/0x4d0 [ 31.552563] rcu_core+0x8c8/0x2860 [ 31.552868] __do_softirq+0x1b7/0x7d4 [ 31.553204] [ 31.553352] Last potentially related work creation: [ 31.553765] kasan_save_stack+0x22/0x50 [ 31.554116] __kasan_record_aux_stack+0x8e/0xa0 [ 31.554508] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.554948] remove_vma+0x139/0x170 [ 31.555261] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.555620] do_vmi_munmap+0x1f1/0x2b0 [ 31.555958] __vm_munmap+0x138/0x3a0 [ 31.556273] __x64_sys_munmap+0x59/0x80 [ 31.556604] do_syscall_64+0x3f/0x90 [ 31.556938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.557372] [ 31.557524] Second to last potentially related work creation: [ 31.557996] kasan_save_stack+0x22/0x50 [ 31.558345] __kasan_record_aux_stack+0x8e/0xa0 [ 31.558738] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.559176] remove_vma+0x139/0x170 [ 31.559511] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.559934] do_vmi_munmap+0x1f1/0x2b0 [ 31.560259] mmap_region+0x1f9/0x2660 [ 31.560590] do_mmap+0x854/0xf00 [ 31.560889] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.561212] ksys_mmap_pgoff+0x3af/0x500 [ 31.561560] do_syscall_64+0x3f/0x90 [ 31.561876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.562318] [ 31.562478] The buggy address belongs to the object at ffff88800e0763a0 [ 31.562478] which belongs to the cache vm_area_struct of size 168 [ 31.563502] The buggy address is located 88 bytes inside of [ 31.563502] freed 168-byte region [ffff88800e0763a0, ffff88800e076448) [ 31.564479] [ 31.564623] The buggy address belongs to the physical page: [ 31.565070] page:000000006474b410 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe076 [ 31.565799] memcg:ffff88800df0aa01 [ 31.566087] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.566531] page_type: 0xffffffff() [ 31.566835] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.567470] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df0aa01 [ 31.568128] page dumped because: kasan: bad access detected [ 31.568576] [ 31.568729] Memory state around the buggy address: [ 31.569130] ffff88800e076280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.569719] ffff88800e076300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.570291] >ffff88800e076380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.570871] ^ [ 31.571448] ffff88800e076400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.572076] ffff88800e076480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.572660] ================================================================== [ 31.573428] Disabling lock debugging due to kernel taint [ 33.411112] BUG: Bad rss-counter state mm:00000000d152c592 type:MM_FILEPAGES val:33 [ 33.411800] BUG: Bad rss-counter state mm:00000000d152c592 type:MM_ANONPAGES val:22 [ 33.784334] BUG: Bad rss-counter state mm:000000007ffee3bb type:MM_FILEPAGES val:33 [ 33.785035] BUG: Bad rss-counter state mm:000000007ffee3bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58320' (ECDSA) to the list of known hosts. 2023/06/21 09:18:03 fuzzer started 2023/06/21 09:18:03 dialing manager at localhost:36067 2023/06/21 09:18:03 checking machine... 2023/06/21 09:18:03 checking revisions... [ 34.354348] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:18:04 testing simple program... [ 34.395639] cgroup: Unknown subsys name 'net' [ 34.441259] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:18:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffdc05b7c58 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=00007f54ce989510000055620eee6790 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=0000000000000004 RBX=00000000fffcbb92 RCX=ffffffff81363cba RDX=0000000000000002 RSI=0000000000000008 RDI=ffffffff85618108 RBP=ffff888008d91b40 RSP=ffff888008da7d60 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=1ffff1100d9e7479 R12=0000000000000000 R13=ffff88806cf35000 R14=0000000000000000 R15=ffff888008d91b40 RIP=ffffffff81360936 RFL=00000002 [-------] 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=00007f46f169bdb0 CR3=000000000e55e000 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=38313a3930203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343938 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000