syzkaller login: [ 68.723869] BUG: Bad rss-counter state mm:000000005e6893ec type:MM_FILEPAGES val:33 [ 68.725111] BUG: Bad rss-counter state mm:000000005e6893ec type:MM_ANONPAGES val:22 [ 68.893853] ================================================================== [ 68.895155] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.896598] Read of size 8 at addr ffff88800def13f8 by task sshd/228 [ 68.897630] [ 68.897896] CPU: 0 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.898944] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.900140] Call Trace: [ 68.900533] [ 68.900880] dump_stack_lvl+0x91/0xf0 [ 68.901466] print_report+0xcc/0x620 [ 68.902053] ? __virt_addr_valid+0x102/0x340 [ 68.902724] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.903474] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.904218] kasan_report+0xbe/0xf0 [ 68.904787] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.905535] vma_interval_tree_remove+0xc75/0xec0 [ 68.906279] vma_prepare+0xc54/0x11a0 [ 68.906864] __split_vma+0x5af/0x950 [ 68.907430] ? __pfx___split_vma+0x10/0x10 [ 68.908060] ? find_held_lock+0x2c/0x110 [ 68.908683] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.909361] ? lock_is_held_type+0x9f/0x120 [ 68.910029] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.910763] ? mtree_range_walk+0x632/0x900 [ 68.911447] ? mas_walk+0x5c7/0x7c0 [ 68.912025] do_vmi_munmap+0x1f1/0x2b0 [ 68.912613] mmap_region+0x1f9/0x2660 [ 68.913198] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.913826] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.914707] ? __pfx_lock_acquire+0x10/0x10 [ 68.915356] ? __pfx_mmap_region+0x10/0x10 [ 68.916004] ? security_mmap_addr+0x7d/0xa0 [ 68.916659] ? get_unmapped_area+0x1f5/0x3f0 [ 68.917333] do_mmap+0x854/0xf00 [ 68.917884] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.918484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.919168] ksys_mmap_pgoff+0x3af/0x500 [ 68.919776] do_syscall_64+0x3f/0x90 [ 68.920374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.921153] RIP: 0033:0x7fe121db3d82 [ 68.921718] 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 [ 68.924308] RSP: 002b:00007fff7bc5f818 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.925423] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe121db3d82 [ 68.926457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1211ed000 [ 68.927481] RBP: 00007fe1211ed000 R08: 0000000000000009 R09: 0000000000001000 [ 68.928511] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557df6dc3ec0 [ 68.929549] R13: 00007fff7bc5f830 R14: 00007fff7bc5f860 R15: 00007fff7bc5fbc0 [ 68.930625] [ 68.930991] [ 68.931248] Allocated by task 221: [ 68.931766] kasan_save_stack+0x22/0x50 [ 68.932379] kasan_set_track+0x25/0x30 [ 68.932988] __kasan_slab_alloc+0x59/0x70 [ 68.933623] kmem_cache_alloc+0x16b/0x370 [ 68.934244] vm_area_dup+0x20/0x160 [ 68.934781] __split_vma+0x170/0x950 [ 68.935348] split_vma+0xc6/0x110 [ 68.935883] mprotect_fixup+0x8d2/0xb30 [ 68.936487] do_mprotect_pkey+0x87e/0xd40 [ 68.937128] __x64_sys_mprotect+0x78/0xc0 [ 68.937780] do_syscall_64+0x3f/0x90 [ 68.938353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.939135] [ 68.939395] Freed by task 221: [ 68.939871] kasan_save_stack+0x22/0x50 [ 68.940480] kasan_set_track+0x25/0x30 [ 68.941082] kasan_save_free_info+0x2b/0x50 [ 68.941752] __kasan_slab_free+0x10a/0x190 [ 68.942407] kmem_cache_free+0x10d/0x4d0 [ 68.943027] rcu_core+0x8c8/0x2860 [ 68.943564] __do_softirq+0x1b7/0x7d4 [ 68.944149] [ 68.944418] Last potentially related work creation: [ 68.945148] kasan_save_stack+0x22/0x50 [ 68.945772] __kasan_record_aux_stack+0x8e/0xa0 [ 68.946396] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.947050] remove_vma+0x139/0x170 [ 68.947513] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.948066] do_vmi_munmap+0x1f1/0x2b0 [ 68.948557] __vm_munmap+0x138/0x3a0 [ 68.949025] __x64_sys_munmap+0x59/0x80 [ 68.949521] do_syscall_64+0x3f/0x90 [ 68.950013] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.950660] [ 68.950877] Second to last potentially related work creation: [ 68.951566] kasan_save_stack+0x22/0x50 [ 68.952078] __kasan_record_aux_stack+0x8e/0xa0 [ 68.952653] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.953298] remove_vma+0x139/0x170 [ 68.953862] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.954530] do_vmi_munmap+0x1f1/0x2b0 [ 68.955108] move_vma.constprop.0+0x88a/0x1ba0 [ 68.955805] __do_sys_mremap+0xb78/0x1780 [ 68.956429] do_syscall_64+0x3f/0x90 [ 68.956997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.957790] [ 68.958052] The buggy address belongs to the object at ffff88800def13a0 [ 68.958052] which belongs to the cache vm_area_struct of size 168 [ 68.959808] The buggy address is located 88 bytes inside of [ 68.959808] freed 168-byte region [ffff88800def13a0, ffff88800def1448) [ 68.961633] [ 68.961848] The buggy address belongs to the physical page: [ 68.962513] page:00000000c76c7600 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef1 [ 68.963617] memcg:ffff88800dfbd701 [ 68.964047] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 68.964753] page_type: 0xffffffff() [ 68.965224] raw: 0100000000000200 ffff8880087a0c80 ffffea0000376e00 dead000000000005 [ 68.966156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfbd701 [ 68.967109] page dumped because: kasan: bad access detected [ 68.967839] [ 68.968064] Memory state around the buggy address: [ 68.968659] ffff88800def1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 68.969517] ffff88800def1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 68.970400] >ffff88800def1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 68.971249] ^ [ 68.972096] ffff88800def1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 68.972952] ffff88800def1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.973820] ================================================================== [ 68.974917] Disabling lock debugging due to kernel taint [ 71.278186] BUG: Bad rss-counter state mm:00000000082df03f type:MM_FILEPAGES val:33 [ 71.279224] BUG: Bad rss-counter state mm:00000000082df03f type:MM_ANONPAGES val:22 [ 71.757996] BUG: Bad rss-counter state mm:0000000065b1f9e0 type:MM_FILEPAGES val:33 [ 71.759220] BUG: Bad rss-counter state mm:0000000065b1f9e0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42792' (ECDSA) to the list of known hosts. 2023/06/21 03:34:20 fuzzer started 2023/06/21 03:34:20 dialing manager at localhost:36067 2023/06/21 03:34:20 checking machine... 2023/06/21 03:34:20 checking revisions... [ 72.475189] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:34:21 testing simple program... [ 72.532591] cgroup: Unknown subsys name 'net' [ 72.585934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:34:20 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=00007ffe17a56fd8 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=00007fdee1860510000055e6d6194790 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=ffffffff83872833 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100197ae36 RSI=ffffffff83872833 RDI=ffff88800cbd7220 RBP=ffff88800cbd71f0 RSP=ffff88800cbd7150 R8 =0000000000000001 R9 =ffff88800cbd7198 R10=0000000000038001 R11=0000000000091bc9 R12=ffff88800cbd7220 R13=0000000000000000 R14=ffff88801681b680 R15=0000000000092cc0 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007f0ecbed0900 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=00007f0ecc487618 CR3=0000000015e50000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000