syzkaller login: [ 30.259187] BUG: Bad rss-counter state mm:00000000e950ac62 type:MM_FILEPAGES val:33 [ 30.260504] BUG: Bad rss-counter state mm:00000000e950ac62 type:MM_ANONPAGES val:22 [ 30.306815] ================================================================== [ 30.307859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.308843] Read of size 8 at addr ffff8880103283f8 by task sshd/220 [ 30.309660] [ 30.309888] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.310792] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.311815] Call Trace: [ 30.312148] [ 30.312447] dump_stack_lvl+0x91/0xf0 [ 30.312964] print_report+0xcc/0x620 [ 30.313500] ? __virt_addr_valid+0x102/0x340 [ 30.314083] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.314734] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.315378] kasan_report+0xbe/0xf0 [ 30.315881] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.316538] vma_interval_tree_remove+0xc75/0xec0 [ 30.317175] vma_prepare+0xc54/0x11a0 [ 30.317692] __split_vma+0x5af/0x950 [ 30.318191] ? __pfx___split_vma+0x10/0x10 [ 30.318748] ? find_held_lock+0x2c/0x110 [ 30.319298] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.319894] ? lock_is_held_type+0x9f/0x120 [ 30.320462] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.321097] ? mtree_range_walk+0x632/0x900 [ 30.321697] ? mas_walk+0x5c7/0x7c0 [ 30.322197] do_vmi_munmap+0x1f1/0x2b0 [ 30.322722] mmap_region+0x1f9/0x2660 [ 30.323233] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.323772] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.324533] ? __pfx_lock_acquire+0x10/0x10 [ 30.325104] ? __pfx_mmap_region+0x10/0x10 [ 30.325673] ? security_mmap_addr+0x7d/0xa0 [ 30.326235] ? get_unmapped_area+0x1f5/0x3f0 [ 30.326818] do_mmap+0x854/0xf00 [ 30.327283] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.327802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.328398] ksys_mmap_pgoff+0x3af/0x500 [ 30.328937] do_syscall_64+0x3f/0x90 [ 30.329449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.330134] RIP: 0033:0x7fc520a1bd82 [ 30.330618] 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 [ 30.332982] RSP: 002b:00007ffedbc53168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.333946] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc520a1bd82 [ 30.334846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc51fe55000 [ 30.335738] RBP: 00007fc51fe55000 R08: 0000000000000009 R09: 0000000000001000 [ 30.336632] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592eaa9df70 [ 30.337531] R13: 00007ffedbc53180 R14: 00007ffedbc531b0 R15: 00007ffedbc53510 [ 30.338443] [ 30.338751] [ 30.338981] Allocated by task 213: [ 30.339436] kasan_save_stack+0x22/0x50 [ 30.339967] kasan_set_track+0x25/0x30 [ 30.340489] __kasan_slab_alloc+0x59/0x70 [ 30.341048] kmem_cache_alloc+0x16b/0x370 [ 30.341617] vm_area_dup+0x20/0x160 [ 30.342098] __split_vma+0x170/0x950 [ 30.342592] split_vma+0xc6/0x110 [ 30.343051] mprotect_fixup+0x8d2/0xb30 [ 30.343585] do_mprotect_pkey+0x87e/0xd40 [ 30.344136] __x64_sys_mprotect+0x78/0xc0 [ 30.344691] do_syscall_64+0x3f/0x90 [ 30.345190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.345878] [ 30.346107] Freed by task 213: [ 30.346524] kasan_save_stack+0x22/0x50 [ 30.347055] kasan_set_track+0x25/0x30 [ 30.347581] kasan_save_free_info+0x2b/0x50 [ 30.348144] __kasan_slab_free+0x10a/0x190 [ 30.348710] kmem_cache_free+0x10d/0x4d0 [ 30.349246] rcu_core+0x8c8/0x2860 [ 30.349741] __do_softirq+0x1b7/0x7d4 [ 30.350247] [ 30.350477] Last potentially related work creation: [ 30.351091] kasan_save_stack+0x22/0x50 [ 30.351623] __kasan_record_aux_stack+0x8e/0xa0 [ 30.352231] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.352912] remove_vma+0x139/0x170 [ 30.353399] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.353984] do_vmi_munmap+0x1f1/0x2b0 [ 30.354497] __vm_munmap+0x138/0x3a0 [ 30.354989] __x64_sys_munmap+0x59/0x80 [ 30.355519] do_syscall_64+0x3f/0x90 [ 30.356018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.356699] [ 30.356931] The buggy address belongs to the object at ffff8880103283a0 [ 30.356931] which belongs to the cache vm_area_struct of size 168 [ 30.358489] The buggy address is located 88 bytes inside of [ 30.358489] freed 168-byte region [ffff8880103283a0, ffff888010328448) [ 30.359973] [ 30.360202] The buggy address belongs to the physical page: [ 30.360904] page:0000000005943da2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10328 [ 30.362074] memcg:ffff888016a27d01 [ 30.362528] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.363206] page_type: 0xffffffff() [ 30.363683] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.364646] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a27d01 [ 30.365612] page dumped because: kasan: bad access detected [ 30.366308] [ 30.366538] Memory state around the buggy address: [ 30.367150] ffff888010328280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.368052] ffff888010328300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.368959] >ffff888010328380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.369869] ^ [ 30.370760] ffff888010328400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.371668] ffff888010328480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.372563] ================================================================== [ 30.374068] Disabling lock debugging due to kernel taint [ 32.204716] BUG: Bad rss-counter state mm:000000008a9e3536 type:MM_FILEPAGES val:33 [ 32.205686] BUG: Bad rss-counter state mm:000000008a9e3536 type:MM_ANONPAGES val:22 [ 32.704429] BUG: Bad rss-counter state mm:00000000d34b9383 type:MM_FILEPAGES val:33 [ 32.706119] BUG: Bad rss-counter state mm:00000000d34b9383 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53957' (ECDSA) to the list of known hosts. 2023/06/21 05:03:43 fuzzer started 2023/06/21 05:03:43 dialing manager at localhost:36067 2023/06/21 05:03:43 checking machine... 2023/06/21 05:03:43 checking revisions... [ 33.436821] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:03:43 testing simple program... [ 33.484834] cgroup: Unknown subsys name 'net' [ 33.536168] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000006 RCX=ffffffff83723e30 RDX=ffff888018668000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000007 RSP=ffff88800f1ff7b8 R8 =0000000000000005 R9 =0000000000000011 R10=0000000000000006 R11=00000000000b6a61 R12=0000000000000002 R13=ffffffff87f99b10 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0261 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 00007ff77ad31900 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=00007fffe575f000 CR3=000000000d7c2000 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=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffa8fa66e30 CR3=000000000d88c000 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=2032343a33303a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33303a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000