syzkaller login: [ 30.115375] BUG: Bad rss-counter state mm:000000009e3c0f46 type:MM_FILEPAGES val:33 [ 30.116768] BUG: Bad rss-counter state mm:000000009e3c0f46 type:MM_ANONPAGES val:22 [ 30.273100] ================================================================== [ 30.274197] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.275445] Read of size 8 at addr ffff88800e2c7b38 by task sshd/220 [ 30.276322] [ 30.276556] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.277495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.278536] Call Trace: [ 30.278893] [ 30.279203] dump_stack_lvl+0x91/0xf0 [ 30.279732] print_report+0xcc/0x620 [ 30.280256] ? __virt_addr_valid+0x102/0x340 [ 30.280855] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.281522] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.282189] kasan_report+0xbe/0xf0 [ 30.282716] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.283400] vma_interval_tree_remove+0xc75/0xec0 [ 30.284067] vma_prepare+0xc54/0x11a0 [ 30.284598] __split_vma+0x5af/0x950 [ 30.285120] ? __pfx___split_vma+0x10/0x10 [ 30.285698] ? find_held_lock+0x2c/0x110 [ 30.286278] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.286917] ? lock_is_held_type+0x9f/0x120 [ 30.287511] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.288177] ? mtree_range_walk+0x632/0x900 [ 30.288789] ? mas_walk+0x5c7/0x7c0 [ 30.289312] do_vmi_munmap+0x1f1/0x2b0 [ 30.289853] mmap_region+0x1f9/0x2660 [ 30.290380] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.290952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.291740] ? __pfx_lock_acquire+0x10/0x10 [ 30.292325] ? __pfx_mmap_region+0x10/0x10 [ 30.292912] ? security_mmap_addr+0x7d/0xa0 [ 30.293492] ? get_unmapped_area+0x1f5/0x3f0 [ 30.294101] do_mmap+0x854/0xf00 [ 30.294579] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.295137] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.295753] ksys_mmap_pgoff+0x3af/0x500 [ 30.296318] do_syscall_64+0x3f/0x90 [ 30.296848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.297554] RIP: 0033:0x7f7eb1ad8d82 [ 30.298058] 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 [ 30.300432] RSP: 002b:00007ffc16aa0798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.301433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7eb1ad8d82 [ 30.302375] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7eb0f12000 [ 30.303330] RBP: 00007f7eb0f12000 R08: 0000000000000009 R09: 0000000000001000 [ 30.304274] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2f9cbcec0 [ 30.305212] R13: 00007ffc16aa07b0 R14: 00007ffc16aa07e0 R15: 00007ffc16aa0b40 [ 30.306157] [ 30.306477] [ 30.306730] Allocated by task 213: [ 30.307206] kasan_save_stack+0x22/0x50 [ 30.307766] kasan_set_track+0x25/0x30 [ 30.308307] __kasan_slab_alloc+0x59/0x70 [ 30.308888] kmem_cache_alloc+0x16b/0x370 [ 30.309456] vm_area_dup+0x20/0x160 [ 30.309959] __split_vma+0x170/0x950 [ 30.310472] split_vma+0xc6/0x110 [ 30.310961] mprotect_fixup+0x8d2/0xb30 [ 30.311519] do_mprotect_pkey+0x87e/0xd40 [ 30.312092] __x64_sys_mprotect+0x78/0xc0 [ 30.312661] do_syscall_64+0x3f/0x90 [ 30.313182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.313890] [ 30.314127] Freed by task 26: [ 30.314541] kasan_save_stack+0x22/0x50 [ 30.315111] kasan_set_track+0x25/0x30 [ 30.315654] kasan_save_free_info+0x2b/0x50 [ 30.316245] __kasan_slab_free+0x10a/0x190 [ 30.316836] kmem_cache_free+0x10d/0x4d0 [ 30.317390] rcu_core+0x8c8/0x2860 [ 30.317880] __do_softirq+0x1b7/0x7d4 [ 30.318400] [ 30.318637] Last potentially related work creation: [ 30.319291] kasan_save_stack+0x22/0x50 [ 30.319847] __kasan_record_aux_stack+0x8e/0xa0 [ 30.320480] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.321191] remove_vma+0x139/0x170 [ 30.321691] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.322301] do_vmi_munmap+0x1f1/0x2b0 [ 30.322836] __vm_munmap+0x138/0x3a0 [ 30.323352] __x64_sys_munmap+0x59/0x80 [ 30.323899] do_syscall_64+0x3f/0x90 [ 30.324429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.325142] [ 30.325383] The buggy address belongs to the object at ffff88800e2c7ae0 [ 30.325383] which belongs to the cache vm_area_struct of size 168 [ 30.327043] The buggy address is located 88 bytes inside of [ 30.327043] freed 168-byte region [ffff88800e2c7ae0, ffff88800e2c7b88) [ 30.328638] [ 30.328872] The buggy address belongs to the physical page: [ 30.329597] page:0000000044480209 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c7 [ 30.330801] memcg:ffff8880099c0201 [ 30.331274] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.332053] page_type: 0xffffffff() [ 30.332549] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.333531] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099c0201 [ 30.334526] page dumped because: kasan: bad access detected [ 30.335255] [ 30.335494] Memory state around the buggy address: [ 30.336145] ffff88800e2c7a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.337100] ffff88800e2c7a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.338053] >ffff88800e2c7b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.339006] ^ [ 30.339691] ffff88800e2c7b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.340650] ffff88800e2c7c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.341603] ================================================================== [ 30.342764] Disabling lock debugging due to kernel taint [ 32.982259] BUG: Bad rss-counter state mm:000000007862b187 type:MM_FILEPAGES val:33 [ 32.983464] BUG: Bad rss-counter state mm:000000007862b187 type:MM_ANONPAGES val:22 [ 33.473765] BUG: Bad rss-counter state mm:00000000f72b234e type:MM_FILEPAGES val:33 [ 33.474883] BUG: Bad rss-counter state mm:00000000f72b234e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65023' (ECDSA) to the list of known hosts. 2023/06/21 06:46:32 fuzzer started 2023/06/21 06:46:32 dialing manager at localhost:36067 2023/06/21 06:46:33 checking machine... 2023/06/21 06:46:33 checking revisions... [ 34.207752] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:46:33 testing simple program... [ 34.257326] cgroup: Unknown subsys name 'net' [ 34.319310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:46:32 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=00007fe0a06650d0 CR3=000000000ca88000 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=5347d6adbe70fab53449269a4fe7ba8f XMM02=ec2efd57dc4c00df0000000000119e18 XMM03=cf7b72a8e0a1f0840000000000119ee8 XMM04=de830d49177edbbb00000000000ae988 XMM05=53547f0b6a6829590000000000132418 XMM06=f9b763c0e8aeb5aa00000000001311b8 XMM07=fb795ef6d65770560000000000121400 XMM08=2c67c8bc2e329bc30000000000119e88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=1ffff110018aae34 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800c5571b0 RSP=ffff88800c5570e8 R8 =ffffffff86138eb4 R9 =ffff88800c557198 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800c5571b8 R13=ffff88800c5571a0 R14=0000000000000005 R15=ffff88800c557158 RIP=ffffffff81130b54 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 00007ff369b93900 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=00007ff36a14a618 CR3=000000001c8c6000 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