syzkaller login: [ 39.744357] BUG: Bad rss-counter state mm:000000008f26bcf9 type:MM_FILEPAGES val:33 [ 39.745515] BUG: Bad rss-counter state mm:000000008f26bcf9 type:MM_ANONPAGES val:22 [ 39.784239] ================================================================== [ 39.785156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.786103] Read of size 8 at addr ffff88800decbd08 by task sshd/220 [ 39.786882] [ 39.787115] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.788064] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.789095] Call Trace: [ 39.789425] [ 39.789721] dump_stack_lvl+0x91/0xf0 [ 39.790216] print_report+0xcc/0x620 [ 39.790729] ? __virt_addr_valid+0x102/0x340 [ 39.791312] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.791946] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.792579] kasan_report+0xbe/0xf0 [ 39.793063] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.793698] vma_interval_tree_remove+0xc75/0xec0 [ 39.794314] vma_prepare+0xc54/0x11a0 [ 39.794808] __split_vma+0x5af/0x950 [ 39.795306] ? __pfx___split_vma+0x10/0x10 [ 39.795846] ? find_held_lock+0x2c/0x110 [ 39.796384] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.796962] ? lock_is_held_type+0x9f/0x120 [ 39.797510] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.798134] ? mtree_range_walk+0x632/0x900 [ 39.798698] ? mas_walk+0x5c7/0x7c0 [ 39.799205] do_vmi_munmap+0x1f1/0x2b0 [ 39.799713] mmap_region+0x1f9/0x2660 [ 39.800206] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.800732] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.801458] ? __pfx_lock_acquire+0x10/0x10 [ 39.802000] ? __pfx_mmap_region+0x10/0x10 [ 39.802546] ? security_mmap_addr+0x7d/0xa0 [ 39.803096] ? get_unmapped_area+0x1f5/0x3f0 [ 39.803663] do_mmap+0x854/0xf00 [ 39.804111] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.804620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.805196] ksys_mmap_pgoff+0x3af/0x500 [ 39.805717] do_syscall_64+0x3f/0x90 [ 39.806208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.806860] RIP: 0033:0x7f29d7541d82 [ 39.807471] 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 [ 39.809729] RSP: 002b:00007fff3b875ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.810690] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f29d7541d82 [ 39.811611] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f29d697b000 [ 39.812509] RBP: 00007f29d697b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.813419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b29af6ec0 [ 39.814326] R13: 00007fff3b875ef0 R14: 00007fff3b875f20 R15: 00007fff3b876280 [ 39.815248] [ 39.815563] [ 39.815788] Allocated by task 213: [ 39.816238] kasan_save_stack+0x22/0x50 [ 39.816766] kasan_set_track+0x25/0x30 [ 39.817290] __kasan_slab_alloc+0x59/0x70 [ 39.817841] kmem_cache_alloc+0x16b/0x370 [ 39.818390] vm_area_dup+0x20/0x160 [ 39.818867] __split_vma+0x170/0x950 [ 39.819391] split_vma+0xc6/0x110 [ 39.819862] mprotect_fixup+0x8d2/0xb30 [ 39.820401] do_mprotect_pkey+0x87e/0xd40 [ 39.820958] __x64_sys_mprotect+0x78/0xc0 [ 39.821507] do_syscall_64+0x3f/0x90 [ 39.822008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.822688] [ 39.822920] Freed by task 213: [ 39.823354] kasan_save_stack+0x22/0x50 [ 39.823885] kasan_set_track+0x25/0x30 [ 39.824403] kasan_save_free_info+0x2b/0x50 [ 39.824959] __kasan_slab_free+0x10a/0x190 [ 39.825523] kmem_cache_free+0x10d/0x4d0 [ 39.826063] rcu_core+0x8c8/0x2860 [ 39.826539] __do_softirq+0x1b7/0x7d4 [ 39.827052] [ 39.827283] Last potentially related work creation: [ 39.827896] kasan_save_stack+0x22/0x50 [ 39.828432] __kasan_record_aux_stack+0x8e/0xa0 [ 39.829062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.829737] remove_vma+0x139/0x170 [ 39.830214] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.830808] do_vmi_munmap+0x1f1/0x2b0 [ 39.831327] __vm_munmap+0x138/0x3a0 [ 39.831831] __x64_sys_munmap+0x59/0x80 [ 39.832353] do_syscall_64+0x3f/0x90 [ 39.832852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.833529] [ 39.833757] Second to last potentially related work creation: [ 39.834478] kasan_save_stack+0x22/0x50 [ 39.835034] __kasan_record_aux_stack+0x8e/0xa0 [ 39.835647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.836333] remove_vma+0x139/0x170 [ 39.836818] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.837404] do_vmi_munmap+0x1f1/0x2b0 [ 39.837921] mmap_region+0x1f9/0x2660 [ 39.838429] do_mmap+0x854/0xf00 [ 39.838883] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.839426] ksys_mmap_pgoff+0x3af/0x500 [ 39.839949] do_syscall_64+0x3f/0x90 [ 39.840450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.841128] [ 39.841353] The buggy address belongs to the object at ffff88800decbcb0 [ 39.841353] which belongs to the cache vm_area_struct of size 168 [ 39.842922] The buggy address is located 88 bytes inside of [ 39.842922] freed 168-byte region [ffff88800decbcb0, ffff88800decbd58) [ 39.844408] [ 39.844642] The buggy address belongs to the physical page: [ 39.845343] page:0000000096b03ed1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdecb [ 39.846482] memcg:ffff88800ddf5201 [ 39.846944] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.847637] page_type: 0xffffffff() [ 39.848120] raw: 0100000000000200 ffff88800879fc80 ffffea0000359280 dead000000000004 [ 39.849107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddf5201 [ 39.850065] page dumped because: kasan: bad access detected [ 39.850776] [ 39.851028] Memory state around the buggy address: [ 39.851664] ffff88800decbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.852562] ffff88800decbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.853472] >ffff88800decbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.854388] ^ [ 39.854863] ffff88800decbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.855777] ffff88800decbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.856692] ================================================================== [ 39.857739] Disabling lock debugging due to kernel taint [ 42.660435] BUG: Bad rss-counter state mm:00000000a981e7cb type:MM_FILEPAGES val:33 [ 42.661532] BUG: Bad rss-counter state mm:00000000a981e7cb type:MM_ANONPAGES val:22 [ 43.248810] BUG: Bad rss-counter state mm:00000000427f8c24 type:MM_FILEPAGES val:33 [ 43.249973] BUG: Bad rss-counter state mm:00000000427f8c24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25654' (ECDSA) to the list of known hosts. 2023/06/19 10:52:56 fuzzer started 2023/06/19 10:52:56 dialing manager at localhost:44161 2023/06/19 10:52:56 checking machine... 2023/06/19 10:52:56 checking revisions... [ 43.915177] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:52:57 testing simple program... [ 43.957621] cgroup: Unknown subsys name 'net' [ 43.996957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:52:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffff888008d7f9d0 RDX=1ffff110011aff2e RSI=ffffffff813ad6d0 RDI=ffff888008d7f930 RBP=ffff888008d7f988 RSP=ffff888008d7f8c0 R8 =0000000000000001 R9 =ffff888008d7f970 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d7f990 R13=ffff888008d7f978 R14=ffff888008d7f971 R15=ffff888008d7f930 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 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=00007f81e54d2870 CR3=000000000c7b4000 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=752b05d83474c3bfc24ce5484ef7511e XMM02=ec2efd57dc4c00df000000000011d228 XMM03=187ddcd0e5a62979000000000011d2f8 XMM04=3cc8c4f6b5a2541a00000000000ae988 XMM05=19e9129bd510f2350000000000134cb0 XMM06=4fda316b135da52b0000000000134b38 XMM07=e042d86d42eb936e0000000000124318 XMM08=187ddcd0e5a62979000000000011d2f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f3e83844618 CR3=000000001c8e6000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000