syzkaller login: [ 30.792477] BUG: Bad rss-counter state mm:00000000fd80a552 type:MM_FILEPAGES val:33 [ 30.793480] BUG: Bad rss-counter state mm:00000000fd80a552 type:MM_ANONPAGES val:22 [ 30.953398] ================================================================== [ 30.954321] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.955272] Read of size 8 at addr ffff888018388228 by task sshd/220 [ 30.956104] [ 30.956362] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.957250] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.958238] Call Trace: [ 30.958561] [ 30.958854] dump_stack_lvl+0x91/0xf0 [ 30.959359] print_report+0xcc/0x620 [ 30.959847] ? __virt_addr_valid+0x102/0x340 [ 30.960398] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961059] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.961676] kasan_report+0xbe/0xf0 [ 30.962148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.962772] vma_interval_tree_remove+0xc75/0xec0 [ 30.963385] vma_prepare+0xc54/0x11a0 [ 30.963885] __split_vma+0x5af/0x950 [ 30.964366] ? __pfx___split_vma+0x10/0x10 [ 30.964919] ? find_held_lock+0x2c/0x110 [ 30.965450] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.966013] ? lock_is_held_type+0x9f/0x120 [ 30.966561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.967166] ? mtree_range_walk+0x632/0x900 [ 30.967717] ? mas_walk+0x5c7/0x7c0 [ 30.968201] do_vmi_munmap+0x1f1/0x2b0 [ 30.968693] mmap_region+0x1f9/0x2660 [ 30.969191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.969703] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.970424] ? __pfx_lock_acquire+0x10/0x10 [ 30.970957] ? __pfx_mmap_region+0x10/0x10 [ 30.971484] ? security_mmap_addr+0x7d/0xa0 [ 30.972018] ? get_unmapped_area+0x1f5/0x3f0 [ 30.972575] do_mmap+0x854/0xf00 [ 30.973038] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.973535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.974100] ksys_mmap_pgoff+0x3af/0x500 [ 30.974612] do_syscall_64+0x3f/0x90 [ 30.975091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975746] RIP: 0033:0x7fcaac622d82 [ 30.976205] 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 [ 30.978361] RSP: 002b:00007ffe61ce87f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.979294] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcaac622d82 [ 30.980170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcaaba5c000 [ 30.981044] RBP: 00007fcaaba5c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.981907] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa29ebef70 [ 30.982779] R13: 00007ffe61ce8810 R14: 00007ffe61ce8840 R15: 00007ffe61ce8ba0 [ 30.983651] [ 30.983945] [ 30.984165] Allocated by task 213: [ 30.984594] kasan_save_stack+0x22/0x50 [ 30.985130] kasan_set_track+0x25/0x30 [ 30.985624] __kasan_slab_alloc+0x59/0x70 [ 30.986160] kmem_cache_alloc+0x16b/0x370 [ 30.986678] vm_area_dup+0x20/0x160 [ 30.987145] __split_vma+0x170/0x950 [ 30.987631] split_vma+0xc6/0x110 [ 30.988082] mprotect_fixup+0x8d2/0xb30 [ 30.988587] do_mprotect_pkey+0x87e/0xd40 [ 30.989115] __x64_sys_mprotect+0x78/0xc0 [ 30.989642] do_syscall_64+0x3f/0x90 [ 30.990121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.990771] [ 30.990987] Freed by task 213: [ 30.991392] kasan_save_stack+0x22/0x50 [ 30.991897] kasan_set_track+0x25/0x30 [ 30.992389] kasan_save_free_info+0x2b/0x50 [ 30.992939] __kasan_slab_free+0x10a/0x190 [ 30.993474] kmem_cache_free+0x10d/0x4d0 [ 30.993988] rcu_core+0x8c8/0x2860 [ 30.994437] __do_softirq+0x1b7/0x7d4 [ 30.994912] [ 30.995128] Last potentially related work creation: [ 30.995712] kasan_save_stack+0x22/0x50 [ 30.996218] __kasan_record_aux_stack+0x8e/0xa0 [ 30.996798] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.997461] remove_vma+0x139/0x170 [ 30.997917] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.998475] do_vmi_munmap+0x1f1/0x2b0 [ 30.998961] __vm_munmap+0x138/0x3a0 [ 30.999435] __x64_sys_munmap+0x59/0x80 [ 30.999936] do_syscall_64+0x3f/0x90 [ 31.000413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.001076] [ 31.001298] Second to last potentially related work creation: [ 31.001980] kasan_save_stack+0x22/0x50 [ 31.002485] __kasan_record_aux_stack+0x8e/0xa0 [ 31.003059] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.003712] remove_vma+0x139/0x170 [ 31.004167] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.004734] do_vmi_munmap+0x1f1/0x2b0 [ 31.005230] mmap_region+0x1f9/0x2660 [ 31.005709] do_mmap+0x854/0xf00 [ 31.006143] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.006633] ksys_mmap_pgoff+0x3af/0x500 [ 31.007144] do_syscall_64+0x3f/0x90 [ 31.007618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.008270] [ 31.008488] The buggy address belongs to the object at ffff8880183881d0 [ 31.008488] which belongs to the cache vm_area_struct of size 168 [ 31.009981] The buggy address is located 88 bytes inside of [ 31.009981] freed 168-byte region [ffff8880183881d0, ffff888018388278) [ 31.011398] [ 31.011616] The buggy address belongs to the physical page: [ 31.012276] page:000000001ed614e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18388 [ 31.013388] memcg:ffff88801839f401 [ 31.013821] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.014464] page_type: 0xffffffff() [ 31.014920] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.015848] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801839f401 [ 31.016758] page dumped because: kasan: bad access detected [ 31.017425] [ 31.017640] Memory state around the buggy address: [ 31.018223] ffff888018388100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.019076] ffff888018388180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.019942] >ffff888018388200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.020802] ^ [ 31.021373] ffff888018388280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.022236] ffff888018388300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.023089] ================================================================== [ 31.024006] Disabling lock debugging due to kernel taint [ 33.423710] BUG: Bad rss-counter state mm:000000001bb390d0 type:MM_FILEPAGES val:33 [ 33.424710] BUG: Bad rss-counter state mm:000000001bb390d0 type:MM_ANONPAGES val:22 [ 33.827667] BUG: Bad rss-counter state mm:000000008fdb8e1b type:MM_FILEPAGES val:33 [ 33.828707] BUG: Bad rss-counter state mm:000000008fdb8e1b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55669' (ECDSA) to the list of known hosts. 2023/06/19 11:49:23 fuzzer started 2023/06/19 11:49:24 dialing manager at localhost:44161 2023/06/19 11:49:24 checking machine... 2023/06/19 11:49:24 checking revisions... [ 34.547118] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:49:24 testing simple program... [ 34.601188] cgroup: Unknown subsys name 'net' [ 34.654075] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:49:23 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=00007ffd4b22a578 CR3=00000000096da000 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=2033323a39343a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a39343a3131203931 XMM08=656b3a725f6d65747379733a755f6d65 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fac42b8d000 CR3=000000000d646000 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=7e88f24f317ec3a1384c04f17745f5de XMM02=2c67c8bc2e329bc3000000000011c6a8 XMM03=fb795ef6d65770560000000000123918 XMM04=d110a7277a8eebf200000000000ae988 XMM05=19e9129bd510f2350000000000134a28 XMM06=24070e7d16f94bfb0000000000133890 XMM07=e042d86d42eb936e0000000000123b98 XMM08=f77090ae5e1a8e34000000000011c708 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000