syzkaller login: [ 30.798630] BUG: Bad rss-counter state mm:00000000cde93c52 type:MM_FILEPAGES val:33 [ 30.800064] BUG: Bad rss-counter state mm:00000000cde93c52 type:MM_ANONPAGES val:22 [ 30.958551] ================================================================== [ 30.959510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.960463] Read of size 8 at addr ffff888016ae6880 by task sshd/220 [ 30.961256] [ 30.961477] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.962449] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.963422] Call Trace: [ 30.963742] [ 30.964027] dump_stack_lvl+0x91/0xf0 [ 30.964522] print_report+0xcc/0x620 [ 30.965010] ? __virt_addr_valid+0x102/0x340 [ 30.965560] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.966201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.966824] kasan_report+0xbe/0xf0 [ 30.967301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.967919] vma_interval_tree_remove+0xc75/0xec0 [ 30.968526] vma_prepare+0xc54/0x11a0 [ 30.969008] __split_vma+0x5af/0x950 [ 30.969480] ? __pfx___split_vma+0x10/0x10 [ 30.970027] ? find_held_lock+0x2c/0x110 [ 30.970547] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.971116] ? lock_is_held_type+0x9f/0x120 [ 30.971656] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.972262] ? mtree_range_walk+0x632/0x900 [ 30.972814] ? mas_walk+0x5c7/0x7c0 [ 30.973293] do_vmi_munmap+0x1f1/0x2b0 [ 30.973791] mmap_region+0x1f9/0x2660 [ 30.974274] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.974781] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.975490] ? __pfx_lock_acquire+0x10/0x10 [ 30.976019] ? __pfx_mmap_region+0x10/0x10 [ 30.976547] ? security_mmap_addr+0x7d/0xa0 [ 30.977077] ? get_unmapped_area+0x1f5/0x3f0 [ 30.977622] do_mmap+0x854/0xf00 [ 30.978081] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.978576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.979135] ksys_mmap_pgoff+0x3af/0x500 [ 30.979643] do_syscall_64+0x3f/0x90 [ 30.980124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.980775] RIP: 0033:0x7ff0bdb8dd82 [ 30.981226] 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 [ 30.983370] RSP: 002b:00007ffc92a28648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.984281] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff0bdb8dd82 [ 30.985115] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0bcfc7000 [ 30.986000] RBP: 00007ff0bcfc7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.986861] R10: 0000000000000812 R11: 0000000000000206 R12: 00005615a0c8bd90 [ 30.987715] R13: 00007ffc92a28660 R14: 00007ffc92a28690 R15: 00007ffc92a289f0 [ 30.988581] [ 30.988870] [ 30.989087] Allocated by task 213: [ 30.989514] kasan_save_stack+0x22/0x50 [ 30.990031] kasan_set_track+0x25/0x30 [ 30.990522] __kasan_slab_alloc+0x59/0x70 [ 30.991045] kmem_cache_alloc+0x16b/0x370 [ 30.991562] vm_area_dup+0x20/0x160 [ 30.992023] __split_vma+0x170/0x950 [ 30.992490] split_vma+0xc6/0x110 [ 30.992931] mprotect_fixup+0x8d2/0xb30 [ 30.993438] do_mprotect_pkey+0x87e/0xd40 [ 30.993968] __x64_sys_mprotect+0x78/0xc0 [ 30.994490] do_syscall_64+0x3f/0x90 [ 30.994964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995609] [ 30.995826] Freed by task 19: [ 30.996205] kasan_save_stack+0x22/0x50 [ 30.996715] kasan_set_track+0x25/0x30 [ 30.997226] kasan_save_free_info+0x2b/0x50 [ 30.997787] __kasan_slab_free+0x10a/0x190 [ 30.998361] kmem_cache_free+0x10d/0x4d0 [ 30.998880] rcu_core+0x8c8/0x2860 [ 30.999325] __do_softirq+0x1b7/0x7d4 [ 30.999814] [ 31.000041] Last potentially related work creation: [ 31.000629] kasan_save_stack+0x22/0x50 [ 31.001151] __kasan_record_aux_stack+0x8e/0xa0 [ 31.001732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.002416] remove_vma+0x139/0x170 [ 31.002885] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.003448] do_vmi_munmap+0x1f1/0x2b0 [ 31.003954] __vm_munmap+0x138/0x3a0 [ 31.004430] __x64_sys_munmap+0x59/0x80 [ 31.004939] do_syscall_64+0x3f/0x90 [ 31.005419] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.006109] [ 31.006328] The buggy address belongs to the object at ffff888016ae6828 [ 31.006328] which belongs to the cache vm_area_struct of size 168 [ 31.007833] The buggy address is located 88 bytes inside of [ 31.007833] freed 168-byte region [ffff888016ae6828, ffff888016ae68d0) [ 31.009263] [ 31.009480] The buggy address belongs to the physical page: [ 31.010184] page:0000000027d2db46 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae6 [ 31.011284] memcg:ffff88800e897d01 [ 31.011706] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.012377] page_type: 0xffffffff() [ 31.012850] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.013820] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e897d01 [ 31.014747] page dumped because: kasan: bad access detected [ 31.015431] [ 31.015649] Memory state around the buggy address: [ 31.016240] ffff888016ae6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.017117] ffff888016ae6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.018032] >ffff888016ae6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.018934] ^ [ 31.019344] ffff888016ae6900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.020220] ffff888016ae6980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.021097] ================================================================== [ 31.022127] Disabling lock debugging due to kernel taint [ 32.884479] BUG: Bad rss-counter state mm:00000000a8cccbe6 type:MM_FILEPAGES val:33 [ 32.885419] BUG: Bad rss-counter state mm:00000000a8cccbe6 type:MM_ANONPAGES val:22 [ 33.359867] BUG: Bad rss-counter state mm:00000000aeaad366 type:MM_FILEPAGES val:33 [ 33.360814] BUG: Bad rss-counter state mm:00000000aeaad366 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7680' (ECDSA) to the list of known hosts. 2023/06/21 01:25:41 fuzzer started 2023/06/21 01:25:41 dialing manager at localhost:36067 2023/06/21 01:25:41 checking machine... 2023/06/21 01:25:41 checking revisions... [ 34.081706] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:25:41 testing simple program... [ 34.145041] cgroup: Unknown subsys name 'net' [ 34.183778] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:25:41 Registers: info registers vcpu 0 RAX=ffffffff8608a55b RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019b07a38 RSP=ffff888019b07920 R8 =ffffffff8608a55a R9 =ffff888019b07a20 R10=0000000000038001 R11=0000000000003c0d R12=ffff888019b07a40 R13=ffff888019b07a28 R14=ffff888019b07a21 R15=ffff888019b079e0 RIP=ffffffff81130ab5 RFL=00000293 [--S-A-C] 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 00007f6445538900 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=00007f6445af00b0 CR3=000000000ed88000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007fb6cd7c7b60 CR3=000000000e02c000 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=2031343a35323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35323a3130203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000