syzkaller login: [ 34.795049] BUG: Bad rss-counter state mm:0000000081d86f8e type:MM_FILEPAGES val:33 [ 34.796410] BUG: Bad rss-counter state mm:0000000081d86f8e type:MM_ANONPAGES val:22 [ 34.967721] ================================================================== [ 34.968896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.970235] Read of size 8 at addr ffff8880164e7a50 by task sshd/220 [ 34.971249] [ 34.971541] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.972752] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.974144] Call Trace: [ 34.974601] [ 34.975004] dump_stack_lvl+0x91/0xf0 [ 34.975715] print_report+0xcc/0x620 [ 34.976399] ? __virt_addr_valid+0x102/0x340 [ 34.977190] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.978035] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.978722] kasan_report+0xbe/0xf0 [ 34.979249] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.979955] vma_interval_tree_remove+0xc75/0xec0 [ 34.980635] vma_prepare+0xc54/0x11a0 [ 34.981156] __split_vma+0x5af/0x950 [ 34.981683] ? __pfx___split_vma+0x10/0x10 [ 34.982251] ? find_held_lock+0x2c/0x110 [ 34.982824] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.983444] ? lock_is_held_type+0x9f/0x120 [ 34.984050] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.984728] ? mtree_range_walk+0x632/0x900 [ 34.985349] ? mas_walk+0x5c7/0x7c0 [ 34.985857] do_vmi_munmap+0x1f1/0x2b0 [ 34.986397] mmap_region+0x1f9/0x2660 [ 34.986917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.987478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.988272] ? __pfx_lock_acquire+0x10/0x10 [ 34.988860] ? __pfx_mmap_region+0x10/0x10 [ 34.989436] ? security_mmap_addr+0x7d/0xa0 [ 34.990002] ? get_unmapped_area+0x1f5/0x3f0 [ 34.990607] do_mmap+0x854/0xf00 [ 34.991085] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.991648] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.992265] ksys_mmap_pgoff+0x3af/0x500 [ 34.992831] do_syscall_64+0x3f/0x90 [ 34.993366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.994069] RIP: 0033:0x7f848aadfd82 [ 34.994580] 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 [ 34.996911] RSP: 002b:00007ffe717af5c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.997904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f848aadfd82 [ 34.998825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8489f19000 [ 34.999790] RBP: 00007f8489f19000 R08: 0000000000000009 R09: 0000000000001000 [ 35.000715] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ccfd637ec0 [ 35.001643] R13: 00007ffe717af5e0 R14: 00007ffe717af610 R15: 00007ffe717af970 [ 35.002584] [ 35.002899] [ 35.003133] Allocated by task 213: [ 35.003625] kasan_save_stack+0x22/0x50 [ 35.004188] kasan_set_track+0x25/0x30 [ 35.004732] __kasan_slab_alloc+0x59/0x70 [ 35.005312] kmem_cache_alloc+0x16b/0x370 [ 35.005876] vm_area_dup+0x20/0x160 [ 35.006377] __split_vma+0x170/0x950 [ 35.006879] split_vma+0xc6/0x110 [ 35.007361] mprotect_fixup+0x8d2/0xb30 [ 35.007936] do_mprotect_pkey+0x87e/0xd40 [ 35.008517] __x64_sys_mprotect+0x78/0xc0 [ 35.009076] do_syscall_64+0x3f/0x90 [ 35.009609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.010315] [ 35.010554] Freed by task 213: [ 35.010990] kasan_save_stack+0x22/0x50 [ 35.011643] kasan_set_track+0x25/0x30 [ 35.012175] kasan_save_free_info+0x2b/0x50 [ 35.012752] __kasan_slab_free+0x10a/0x190 [ 35.013354] kmem_cache_free+0x10d/0x4d0 [ 35.013903] rcu_core+0x8c8/0x2860 [ 35.014400] __do_softirq+0x1b7/0x7d4 [ 35.014926] [ 35.015159] Last potentially related work creation: [ 35.015812] kasan_save_stack+0x22/0x50 [ 35.016369] __kasan_record_aux_stack+0x8e/0xa0 [ 35.016982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.017698] remove_vma+0x139/0x170 [ 35.018187] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.018803] do_vmi_munmap+0x1f1/0x2b0 [ 35.019345] __vm_munmap+0x138/0x3a0 [ 35.019867] __x64_sys_munmap+0x59/0x80 [ 35.020410] do_syscall_64+0x3f/0x90 [ 35.020915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.021623] [ 35.021855] The buggy address belongs to the object at ffff8880164e79f8 [ 35.021855] which belongs to the cache vm_area_struct of size 168 [ 35.023449] The buggy address is located 88 bytes inside of [ 35.023449] freed 168-byte region [ffff8880164e79f8, ffff8880164e7aa0) [ 35.024971] [ 35.025214] The buggy address belongs to the physical page: [ 35.025936] page:00000000a1593e09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x164e7 [ 35.027122] memcg:ffff888019f30801 [ 35.027603] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.028348] page_type: 0xffffffff() [ 35.028840] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.029859] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f30801 [ 35.030852] page dumped because: kasan: bad access detected [ 35.031587] [ 35.031841] Memory state around the buggy address: [ 35.032480] ffff8880164e7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.033438] ffff8880164e7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.034376] >ffff8880164e7a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.035299] ^ [ 35.036075] ffff8880164e7a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.037014] ffff8880164e7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.037958] ================================================================== [ 35.039100] Disabling lock debugging due to kernel taint [ 36.937342] BUG: Bad rss-counter state mm:00000000930ee346 type:MM_FILEPAGES val:33 [ 36.938202] BUG: Bad rss-counter state mm:00000000930ee346 type:MM_ANONPAGES val:22 [ 37.554977] BUG: Bad rss-counter state mm:00000000783beb12 type:MM_FILEPAGES val:33 [ 37.556175] BUG: Bad rss-counter state mm:00000000783beb12 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7390' (ECDSA) to the list of known hosts. 2023/06/19 19:09:35 fuzzer started 2023/06/19 19:09:35 dialing manager at localhost:44161 2023/06/19 19:09:35 checking machine... 2023/06/19 19:09:35 checking revisions... [ 38.195561] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:09:35 testing simple program... [ 38.241712] cgroup: Unknown subsys name 'net' [ 38.295718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:09:31 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=000055e923fcc218 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=00007f1a588ad51000005595d5d72790 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=0000000000000007 RBX=0000000000000001 RCX=ffffffff8186cb25 RDX=00000000000086cb RSI=00000000000086cb RDI=ffffffff865096ec RBP=ffff88801a37f750 RSP=ffff88801a37f688 R8 =0000000000000000 R9 =ffff88801a37f738 R10=0000000000038001 R11=00000000000229c7 R12=ffff88801a37f758 R13=ffff88801a37f740 R14=ffff88801a37f739 R15=ffff88801a37f6f8 RIP=ffffffff811307c2 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 00007f6b25a54900 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=00007f6b2600c0b0 CR3=0000000013438000 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=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