syzkaller login: [ 30.922987] BUG: Bad rss-counter state mm:000000009977a260 type:MM_FILEPAGES val:33 [ 30.923721] BUG: Bad rss-counter state mm:000000009977a260 type:MM_ANONPAGES val:22 [ 30.955608] ================================================================== [ 30.956674] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.957789] Read of size 8 at addr ffff888016936ed8 by task sshd/221 [ 30.958802] [ 30.959043] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.960043] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.961233] Call Trace: [ 30.961577] [ 30.961880] dump_stack_lvl+0x91/0xf0 [ 30.962408] print_report+0xcc/0x620 [ 30.962919] ? __virt_addr_valid+0x102/0x340 [ 30.963500] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964150] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964814] kasan_report+0xbe/0xf0 [ 30.965317] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.965977] vma_interval_tree_remove+0xc75/0xec0 [ 30.966611] vma_prepare+0xc54/0x11a0 [ 30.967122] __split_vma+0x5af/0x950 [ 30.967625] ? __pfx___split_vma+0x10/0x10 [ 30.968184] ? find_held_lock+0x2c/0x110 [ 30.968749] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.969359] ? lock_is_held_type+0x9f/0x120 [ 30.969933] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.970585] ? mtree_range_walk+0x632/0x900 [ 30.971169] ? mas_walk+0x5c7/0x7c0 [ 30.971683] do_vmi_munmap+0x1f1/0x2b0 [ 30.972209] mmap_region+0x1f9/0x2660 [ 30.972743] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.973288] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.974045] ? __pfx_lock_acquire+0x10/0x10 [ 30.974608] ? __pfx_mmap_region+0x10/0x10 [ 30.975178] ? security_mmap_addr+0x7d/0xa0 [ 30.975754] ? get_unmapped_area+0x1f5/0x3f0 [ 30.976355] do_mmap+0x854/0xf00 [ 30.976831] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.977357] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.977956] ksys_mmap_pgoff+0x3af/0x500 [ 30.978490] do_syscall_64+0x3f/0x90 [ 30.978997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.979684] RIP: 0033:0x7f6d53181d82 [ 30.980170] 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 [ 30.982441] RSP: 002b:00007ffcf8389958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.983403] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d53181d82 [ 30.984314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d525bb000 [ 30.985219] RBP: 00007f6d525bb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.986137] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590a7946ec0 [ 30.987038] R13: 00007ffcf8389970 R14: 00007ffcf83899a0 R15: 00007ffcf8389d00 [ 30.987947] [ 30.988262] [ 30.988490] Allocated by task 214: [ 30.988950] kasan_save_stack+0x22/0x50 [ 30.989489] kasan_set_track+0x25/0x30 [ 30.990010] __kasan_slab_alloc+0x59/0x70 [ 30.990567] kmem_cache_alloc+0x16b/0x370 [ 30.991119] vm_area_dup+0x20/0x160 [ 30.991603] __split_vma+0x170/0x950 [ 30.992095] split_vma+0xc6/0x110 [ 30.992562] mprotect_fixup+0x8d2/0xb30 [ 30.993113] do_mprotect_pkey+0x87e/0xd40 [ 30.993663] __x64_sys_mprotect+0x78/0xc0 [ 30.994223] do_syscall_64+0x3f/0x90 [ 30.994729] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.995416] [ 30.995644] Freed by task 13: [ 30.996053] kasan_save_stack+0x22/0x50 [ 30.996585] kasan_set_track+0x25/0x30 [ 30.997129] kasan_save_free_info+0x2b/0x50 [ 30.997693] __kasan_slab_free+0x10a/0x190 [ 30.998262] kmem_cache_free+0x10d/0x4d0 [ 30.998807] rcu_core+0x8c8/0x2860 [ 30.999278] __do_softirq+0x1b7/0x7d4 [ 30.999848] [ 31.000076] Last potentially related work creation: [ 31.000717] kasan_save_stack+0x22/0x50 [ 31.001252] __kasan_record_aux_stack+0x8e/0xa0 [ 31.001865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.002546] remove_vma+0x139/0x170 [ 31.003022] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.003610] do_vmi_munmap+0x1f1/0x2b0 [ 31.004123] __vm_munmap+0x138/0x3a0 [ 31.004623] __x64_sys_munmap+0x59/0x80 [ 31.005146] do_syscall_64+0x3f/0x90 [ 31.005652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.006337] [ 31.006564] The buggy address belongs to the object at ffff888016936e80 [ 31.006564] which belongs to the cache vm_area_struct of size 168 [ 31.008126] The buggy address is located 88 bytes inside of [ 31.008126] freed 168-byte region [ffff888016936e80, ffff888016936f28) [ 31.009615] [ 31.009843] The buggy address belongs to the physical page: [ 31.010543] page:0000000097c9e28b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16936 [ 31.011703] memcg:ffff88800f045301 [ 31.012157] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.012916] page_type: 0xffffffff() [ 31.013396] raw: 0100000000000200 ffff8880087a0c80 ffffea00003969c0 dead000000000007 [ 31.014369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f045301 [ 31.015334] page dumped because: kasan: bad access detected [ 31.016036] [ 31.016264] Memory state around the buggy address: [ 31.016893] ffff888016936d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.017806] ffff888016936e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.018711] >ffff888016936e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.019640] ^ [ 31.020422] ffff888016936f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.021342] ffff888016936f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.022245] ================================================================== [ 31.023242] Disabling lock debugging due to kernel taint [ 32.984948] BUG: Bad rss-counter state mm:00000000eb11b3b1 type:MM_FILEPAGES val:33 [ 32.985948] BUG: Bad rss-counter state mm:00000000eb11b3b1 type:MM_ANONPAGES val:22 [ 33.544418] BUG: Bad rss-counter state mm:000000001b6229e1 type:MM_FILEPAGES val:33 [ 33.545597] BUG: Bad rss-counter state mm:000000001b6229e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24450' (ECDSA) to the list of known hosts. 2023/06/20 17:04:58 fuzzer started 2023/06/20 17:04:58 dialing manager at localhost:36067 2023/06/20 17:04:58 checking machine... 2023/06/20 17:04:58 checking revisions... [ 34.200022] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:04:58 testing simple program... [ 34.253189] cgroup: Unknown subsys name 'net' [ 34.295481] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:04:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000058 RCX=0000000000000000 RDX=ffff888019078000 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=0000000000000059 RSP=ffff88800efb77b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99da0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c089b 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 00007fc8ba15d900 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=00007ffd8760c000 CR3=000000000dc68000 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=00007f012aaebf00 CR3=000000000cf2e000 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=2037353a34303a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34303a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000