syzkaller login: [ 30.606158] BUG: Bad rss-counter state mm:00000000d2689203 type:MM_FILEPAGES val:33 [ 30.607491] BUG: Bad rss-counter state mm:00000000d2689203 type:MM_ANONPAGES val:22 [ 30.788895] ================================================================== [ 30.790036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.791219] Read of size 8 at addr ffff88800e3a35c8 by task sshd/221 [ 30.792016] [ 30.792245] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.793165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.794189] Call Trace: [ 30.794527] [ 30.794827] dump_stack_lvl+0x91/0xf0 [ 30.795343] print_report+0xcc/0x620 [ 30.795858] ? __virt_addr_valid+0x102/0x340 [ 30.796440] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.797735] kasan_report+0xbe/0xf0 [ 30.798239] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.798897] vma_interval_tree_remove+0xc75/0xec0 [ 30.799535] vma_prepare+0xc54/0x11a0 [ 30.800042] __split_vma+0x5af/0x950 [ 30.800540] ? __pfx___split_vma+0x10/0x10 [ 30.801097] ? find_held_lock+0x2c/0x110 [ 30.801646] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.802262] ? lock_is_held_type+0x9f/0x120 [ 30.802832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.803472] ? mtree_range_walk+0x632/0x900 [ 30.804065] ? mas_walk+0x5c7/0x7c0 [ 30.804568] do_vmi_munmap+0x1f1/0x2b0 [ 30.805090] mmap_region+0x1f9/0x2660 [ 30.805602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.806157] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.806911] ? __pfx_lock_acquire+0x10/0x10 [ 30.807476] ? __pfx_mmap_region+0x10/0x10 [ 30.808037] ? security_mmap_addr+0x7d/0xa0 [ 30.808593] ? get_unmapped_area+0x1f5/0x3f0 [ 30.809177] do_mmap+0x854/0xf00 [ 30.809642] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.810173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.810760] ksys_mmap_pgoff+0x3af/0x500 [ 30.811288] do_syscall_64+0x3f/0x90 [ 30.811787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.812459] RIP: 0033:0x7f6008134d82 [ 30.812937] 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 [ 30.815160] RSP: 002b:00007ffefc149118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.816109] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6008134d82 [ 30.816993] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f600756e000 [ 30.817885] RBP: 00007f600756e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.818778] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559be17f1d90 [ 30.819664] R13: 00007ffefc149130 R14: 00007ffefc149160 R15: 00007ffefc1494c0 [ 30.820563] [ 30.820867] [ 30.821095] Allocated by task 214: [ 30.821538] kasan_save_stack+0x22/0x50 [ 30.822096] kasan_set_track+0x25/0x30 [ 30.822611] __kasan_slab_alloc+0x59/0x70 [ 30.823161] kmem_cache_alloc+0x16b/0x370 [ 30.823698] vm_area_dup+0x20/0x160 [ 30.824167] __split_vma+0x170/0x950 [ 30.824652] split_vma+0xc6/0x110 [ 30.825103] mprotect_fixup+0x8d2/0xb30 [ 30.825624] do_mprotect_pkey+0x87e/0xd40 [ 30.826168] __x64_sys_mprotect+0x78/0xc0 [ 30.826704] do_syscall_64+0x3f/0x90 [ 30.827194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.827854] [ 30.828077] Freed by task 214: [ 30.828482] kasan_save_stack+0x22/0x50 [ 30.829000] kasan_set_track+0x25/0x30 [ 30.829509] kasan_save_free_info+0x2b/0x50 [ 30.830073] __kasan_slab_free+0x10a/0x190 [ 30.830622] kmem_cache_free+0x10d/0x4d0 [ 30.831151] rcu_core+0x8c8/0x2860 [ 30.831609] __do_softirq+0x1b7/0x7d4 [ 30.832106] [ 30.832330] Last potentially related work creation: [ 30.832934] kasan_save_stack+0x22/0x50 [ 30.833454] __kasan_record_aux_stack+0x8e/0xa0 [ 30.834057] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.834813] remove_vma+0x139/0x170 [ 30.835282] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.835856] do_vmi_munmap+0x1f1/0x2b0 [ 30.836352] __vm_munmap+0x138/0x3a0 [ 30.836827] __x64_sys_munmap+0x59/0x80 [ 30.837332] do_syscall_64+0x3f/0x90 [ 30.837817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838499] [ 30.838720] Second to last potentially related work creation: [ 30.839419] kasan_save_stack+0x22/0x50 [ 30.839940] __kasan_record_aux_stack+0x8e/0xa0 [ 30.840528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.841190] remove_vma+0x139/0x170 [ 30.841649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.842226] do_vmi_munmap+0x1f1/0x2b0 [ 30.842725] mmap_region+0x1f9/0x2660 [ 30.843215] do_mmap+0x854/0xf00 [ 30.843664] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.844159] ksys_mmap_pgoff+0x3af/0x500 [ 30.844673] do_syscall_64+0x3f/0x90 [ 30.845162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845820] [ 30.846045] The buggy address belongs to the object at ffff88800e3a3570 [ 30.846045] which belongs to the cache vm_area_struct of size 168 [ 30.847534] The buggy address is located 88 bytes inside of [ 30.847534] freed 168-byte region [ffff88800e3a3570, ffff88800e3a3618) [ 30.848958] [ 30.849175] The buggy address belongs to the physical page: [ 30.849844] page:000000002994958a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3a3 [ 30.850967] memcg:ffff88800e069301 [ 30.851398] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.852050] page_type: 0xffffffff() [ 30.852511] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d4900 dead000000000002 [ 30.853437] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e069301 [ 30.854356] page dumped because: kasan: bad access detected [ 30.855020] [ 30.855237] Memory state around the buggy address: [ 30.855822] ffff88800e3a3480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.856683] ffff88800e3a3500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.857548] >ffff88800e3a3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.858416] ^ [ 30.859082] ffff88800e3a3600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 30.859950] ffff88800e3a3680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.860814] ================================================================== [ 30.861959] Disabling lock debugging due to kernel taint [ 32.760416] BUG: Bad rss-counter state mm:0000000045e85850 type:MM_FILEPAGES val:33 [ 32.761452] BUG: Bad rss-counter state mm:0000000045e85850 type:MM_ANONPAGES val:22 [ 33.326446] BUG: Bad rss-counter state mm:00000000d7494177 type:MM_FILEPAGES val:33 [ 33.327652] BUG: Bad rss-counter state mm:00000000d7494177 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55456' (ECDSA) to the list of known hosts. 2023/06/21 03:46:52 fuzzer started 2023/06/21 03:46:52 dialing manager at localhost:36067 2023/06/21 03:46:52 checking machine... 2023/06/21 03:46:52 checking revisions... [ 34.070319] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:46:52 testing simple program... [ 34.117536] cgroup: Unknown subsys name 'net' [ 34.168555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:46:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff0322c9a8 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=00007fce8e4f951000005560ce7ea790 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=1ffffffff0bf49eb RBX=ffffffff85fa4f5c RCX=ffffffff8363b5a6 RDX=0000000000000000 RSI=ffffffff863b353c RDI=ffffffff85fa4f3c RBP=ffffffff85fa4f5c RSP=ffff8880167f78a8 R8 =ffffffff863b353c R9 =ffff8880167f79a0 R10=0000000000038001 R11=000000000008a95e R12=ffffffff85fa4f5c R13=ffffffff85fa4f3c R14=ffffffff85fa4f58 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f453283c900 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=00007f4532df3618 CR3=000000000dfce000 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=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