syzkaller login: [ 100.807818] BUG: Bad rss-counter state mm:000000002cbcd97f type:MM_FILEPAGES val:33 [ 100.808852] BUG: Bad rss-counter state mm:000000002cbcd97f type:MM_ANONPAGES val:22 [ 100.986749] ================================================================== [ 100.987663] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 100.988620] Read of size 8 at addr ffff88800ddfb310 by task sshd/230 [ 100.989490] [ 100.989709] CPU: 0 PID: 230 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 100.990737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 100.991725] Call Trace: [ 100.992044] [ 100.992339] dump_stack_lvl+0x91/0xf0 [ 100.992826] print_report+0xcc/0x620 [ 100.993310] ? __virt_addr_valid+0x102/0x340 [ 100.993864] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.994477] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.995098] kasan_report+0xbe/0xf0 [ 100.995575] ? vma_interval_tree_remove+0xc75/0xec0 [ 100.996211] vma_interval_tree_remove+0xc75/0xec0 [ 100.996815] vma_prepare+0xc54/0x11a0 [ 100.997300] __split_vma+0x5af/0x950 [ 100.997768] ? __pfx___split_vma+0x10/0x10 [ 100.998300] ? find_held_lock+0x2c/0x110 [ 100.998820] do_vmi_align_munmap+0x2ba/0x11f0 [ 100.999386] ? lock_is_held_type+0x9f/0x120 [ 100.999927] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 101.000557] ? mtree_range_walk+0x632/0x900 [ 101.001119] ? mas_walk+0x5c7/0x7c0 [ 101.001594] do_vmi_munmap+0x1f1/0x2b0 [ 101.002088] mmap_region+0x1f9/0x2660 [ 101.002582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 101.003093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 101.003809] ? __pfx_lock_acquire+0x10/0x10 [ 101.004354] ? __pfx_mmap_region+0x10/0x10 [ 101.004888] ? security_mmap_addr+0x7d/0xa0 [ 101.005423] ? get_unmapped_area+0x1f5/0x3f0 [ 101.005971] do_mmap+0x854/0xf00 [ 101.006413] vm_mmap_pgoff+0x1a6/0x3a0 [ 101.006909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 101.007478] ksys_mmap_pgoff+0x3af/0x500 [ 101.007986] do_syscall_64+0x3f/0x90 [ 101.008474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.009121] RIP: 0033:0x7f7c41d37d82 [ 101.009577] 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 [ 101.011683] RSP: 002b:00007ffdb8002058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 101.012603] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c41d37d82 [ 101.013452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c41171000 [ 101.014306] RBP: 00007f7c41171000 R08: 0000000000000009 R09: 0000000000001000 [ 101.015159] R10: 0000000000000812 R11: 0000000000000206 R12: 000055972de44ec0 [ 101.016022] R13: 00007ffdb8002070 R14: 00007ffdb80020a0 R15: 00007ffdb8002400 [ 101.016896] [ 101.017192] [ 101.017407] Allocated by task 220: [ 101.017839] kasan_save_stack+0x22/0x50 [ 101.018346] kasan_set_track+0x25/0x30 [ 101.018836] __kasan_slab_alloc+0x59/0x70 [ 101.019362] kmem_cache_alloc+0x16b/0x370 [ 101.019877] vm_area_dup+0x20/0x160 [ 101.020343] __split_vma+0x170/0x950 [ 101.020807] split_vma+0xc6/0x110 [ 101.021249] mprotect_fixup+0x8d2/0xb30 [ 101.021747] do_mprotect_pkey+0x87e/0xd40 [ 101.022268] __x64_sys_mprotect+0x78/0xc0 [ 101.022797] do_syscall_64+0x3f/0x90 [ 101.023274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.023923] [ 101.024143] Freed by task 203: [ 101.024555] kasan_save_stack+0x22/0x50 [ 101.025062] kasan_set_track+0x25/0x30 [ 101.025556] kasan_save_free_info+0x2b/0x50 [ 101.026088] __kasan_slab_free+0x10a/0x190 [ 101.026623] kmem_cache_free+0x10d/0x4d0 [ 101.027128] rcu_core+0x8c8/0x2860 [ 101.027582] __do_softirq+0x1b7/0x7d4 [ 101.028054] [ 101.028282] Last potentially related work creation: [ 101.028866] kasan_save_stack+0x22/0x50 [ 101.029371] __kasan_record_aux_stack+0x8e/0xa0 [ 101.029946] __call_rcu_common.constprop.0+0x6a/0xb90 [ 101.030584] remove_vma+0x139/0x170 [ 101.031031] do_vmi_align_munmap+0xd4a/0x11f0 [ 101.031592] do_vmi_munmap+0x1f1/0x2b0 [ 101.032080] __vm_munmap+0x138/0x3a0 [ 101.032568] __x64_sys_munmap+0x59/0x80 [ 101.033064] do_syscall_64+0x3f/0x90 [ 101.033537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.034185] [ 101.034400] Second to last potentially related work creation: [ 101.035081] kasan_save_stack+0x22/0x50 [ 101.035589] __kasan_record_aux_stack+0x8e/0xa0 [ 101.036161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 101.036823] remove_vma+0x139/0x170 [ 101.037279] do_vmi_align_munmap+0xd4a/0x11f0 [ 101.037840] do_vmi_munmap+0x1f1/0x2b0 [ 101.038334] mmap_region+0x1f9/0x2660 [ 101.038816] do_mmap+0x854/0xf00 [ 101.039246] vm_mmap_pgoff+0x1a6/0x3a0 [ 101.039741] ksys_mmap_pgoff+0x3af/0x500 [ 101.040269] do_syscall_64+0x3f/0x90 [ 101.040748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 101.041391] [ 101.041606] The buggy address belongs to the object at ffff88800ddfb2b8 [ 101.041606] which belongs to the cache vm_area_struct of size 168 [ 101.043073] The buggy address is located 88 bytes inside of [ 101.043073] freed 168-byte region [ffff88800ddfb2b8, ffff88800ddfb360) [ 101.044482] [ 101.044696] The buggy address belongs to the physical page: [ 101.045350] page:00000000b19d93aa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddfb [ 101.046426] memcg:ffff88800c643a01 [ 101.046857] flags: 0x100000000000200(slab|node=0|zone=1) [ 101.047501] page_type: 0xffffffff() [ 101.047951] raw: 0100000000000200 ffff88800879fc80 ffffea000032ba40 dead000000000008 [ 101.048878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c643a01 [ 101.049811] page dumped because: kasan: bad access detected [ 101.050475] [ 101.050690] Memory state around the buggy address: [ 101.051268] ffff88800ddfb200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 101.052119] ffff88800ddfb280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 101.052986] >ffff88800ddfb300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 101.053844] ^ [ 101.054308] ffff88800ddfb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 101.055161] ffff88800ddfb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 101.056008] ================================================================== [ 101.057054] Disabling lock debugging due to kernel taint [ 102.964784] BUG: Bad rss-counter state mm:00000000eaf97703 type:MM_FILEPAGES val:33 [ 102.965971] BUG: Bad rss-counter state mm:00000000eaf97703 type:MM_ANONPAGES val:22 [ 103.464161] BUG: Bad rss-counter state mm:00000000955226f6 type:MM_FILEPAGES val:33 [ 103.465688] BUG: Bad rss-counter state mm:00000000955226f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32206' (ECDSA) to the list of known hosts. 2023/06/20 03:24:51 fuzzer started 2023/06/20 03:24:51 dialing manager at localhost:44161 2023/06/20 03:24:51 checking machine... 2023/06/20 03:24:51 checking revisions... [ 104.241613] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:24:51 testing simple program... [ 104.294146] cgroup: Unknown subsys name 'net' [ 104.356103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:24:18 Registers: info registers vcpu 0 RAX=ffffffff860d68fb RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c1ad1f RBP=ffff88800dc0f900 RSP=ffff88800dc0f838 R8 =ffffffff860d68fa R9 =ffff88800dc0f8e8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800dc0f908 R13=ffff88800dc0f8f0 R14=ffff88800dc0f9e0 R15=ffff88800dc0f8a8 RIP=ffffffff81131127 RFL=00000212 [----A--] 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 00007ff070dbe900 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=00007ff071373650 CR3=000000000cc80000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002021d8f RBX=ffff88801010ec48 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801010ec78 RBP=ffff88800b57cd38 RSP=ffff88806cf09db8 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800b5c0000 R14=ffffffff818d9dc6 R15=ffff88800eef8780 RIP=ffffffff81846362 RFL=00000046 [---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 00007fcd6ea4f700 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=00007efc106e3420 CR3=000000000e388000 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=2030353a34323a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3733 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3733325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34323a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000