syzkaller login: [ 32.224030] BUG: Bad rss-counter state mm:00000000a31d9967 type:MM_FILEPAGES val:33 [ 32.225252] BUG: Bad rss-counter state mm:00000000a31d9967 type:MM_ANONPAGES val:22 [ 32.262115] ================================================================== [ 32.263075] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.264075] Read of size 8 at addr ffff88800f0c4c20 by task sshd/221 [ 32.264843] [ 32.265060] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.265946] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.267009] Call Trace: [ 32.267331] [ 32.267635] dump_stack_lvl+0x91/0xf0 [ 32.268161] print_report+0xcc/0x620 [ 32.268658] ? __virt_addr_valid+0x102/0x340 [ 32.269255] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.269879] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.270485] kasan_report+0xbe/0xf0 [ 32.270958] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.271581] vma_interval_tree_remove+0xc75/0xec0 [ 32.272203] vma_prepare+0xc54/0x11a0 [ 32.272693] __split_vma+0x5af/0x950 [ 32.273191] ? __pfx___split_vma+0x10/0x10 [ 32.273708] ? find_held_lock+0x2c/0x110 [ 32.274230] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.274786] ? lock_is_held_type+0x9f/0x120 [ 32.275318] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.275919] ? mtree_range_walk+0x632/0x900 [ 32.276494] ? mas_walk+0x5c7/0x7c0 [ 32.277000] do_vmi_munmap+0x1f1/0x2b0 [ 32.277528] mmap_region+0x1f9/0x2660 [ 32.278037] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.278557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.279316] ? __pfx_lock_acquire+0x10/0x10 [ 32.279867] ? __pfx_mmap_region+0x10/0x10 [ 32.280425] ? security_mmap_addr+0x7d/0xa0 [ 32.281018] ? get_unmapped_area+0x1f5/0x3f0 [ 32.281592] do_mmap+0x854/0xf00 [ 32.282065] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.282586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.283169] ksys_mmap_pgoff+0x3af/0x500 [ 32.283696] do_syscall_64+0x3f/0x90 [ 32.284197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.284885] RIP: 0033:0x7f5580687d82 [ 32.285369] 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 [ 32.287628] RSP: 002b:00007fff03df30e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.288556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5580687d82 [ 32.289474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f557fac1000 [ 32.290343] RBP: 00007f557fac1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.291229] R10: 0000000000000812 R11: 0000000000000206 R12: 000055984b507ec0 [ 32.292108] R13: 00007fff03df3100 R14: 00007fff03df3130 R15: 00007fff03df3490 [ 32.293051] [ 32.293360] [ 32.293588] Allocated by task 214: [ 32.294070] kasan_save_stack+0x22/0x50 [ 32.294590] kasan_set_track+0x25/0x30 [ 32.295096] __kasan_slab_alloc+0x59/0x70 [ 32.295615] kmem_cache_alloc+0x16b/0x370 [ 32.296134] vm_area_dup+0x20/0x160 [ 32.296640] __split_vma+0x170/0x950 [ 32.297142] split_vma+0xc6/0x110 [ 32.297621] mprotect_fixup+0x8d2/0xb30 [ 32.298139] do_mprotect_pkey+0x87e/0xd40 [ 32.298683] __x64_sys_mprotect+0x78/0xc0 [ 32.299231] do_syscall_64+0x3f/0x90 [ 32.299711] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.300374] [ 32.300591] Freed by task 214: [ 32.301017] kasan_save_stack+0x22/0x50 [ 32.301539] kasan_set_track+0x25/0x30 [ 32.302046] kasan_save_free_info+0x2b/0x50 [ 32.302600] __kasan_slab_free+0x10a/0x190 [ 32.303141] kmem_cache_free+0x10d/0x4d0 [ 32.303660] rcu_core+0x8c8/0x2860 [ 32.304131] __do_softirq+0x1b7/0x7d4 [ 32.304633] [ 32.304892] Last potentially related work creation: [ 32.305522] kasan_save_stack+0x22/0x50 [ 32.306065] __kasan_record_aux_stack+0x8e/0xa0 [ 32.306675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.307357] remove_vma+0x139/0x170 [ 32.307836] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.308437] do_vmi_munmap+0x1f1/0x2b0 [ 32.308975] __vm_munmap+0x138/0x3a0 [ 32.309477] __x64_sys_munmap+0x59/0x80 [ 32.310024] do_syscall_64+0x3f/0x90 [ 32.310542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.311232] [ 32.311469] The buggy address belongs to the object at ffff88800f0c4bc8 [ 32.311469] which belongs to the cache vm_area_struct of size 168 [ 32.313077] The buggy address is located 88 bytes inside of [ 32.313077] freed 168-byte region [ffff88800f0c4bc8, ffff88800f0c4c70) [ 32.314567] [ 32.314782] The buggy address belongs to the physical page: [ 32.315475] page:00000000996185a1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0c4 [ 32.316613] memcg:ffff88800ff23801 [ 32.317079] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.317746] page_type: 0xffffffff() [ 32.318229] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.319217] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff23801 [ 32.320141] page dumped because: kasan: bad access detected [ 32.320806] [ 32.321023] Memory state around the buggy address: [ 32.321592] ffff88800f0c4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.322503] ffff88800f0c4b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.323410] >ffff88800f0c4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.324320] ^ [ 32.324885] ffff88800f0c4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.325801] ffff88800f0c4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.326694] ================================================================== [ 32.327819] Disabling lock debugging due to kernel taint [ 34.382153] BUG: Bad rss-counter state mm:00000000c52a28b7 type:MM_FILEPAGES val:33 [ 34.383334] BUG: Bad rss-counter state mm:00000000c52a28b7 type:MM_ANONPAGES val:22 [ 34.782927] BUG: Bad rss-counter state mm:0000000047171edd type:MM_FILEPAGES val:33 [ 34.783992] BUG: Bad rss-counter state mm:0000000047171edd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42135' (ECDSA) to the list of known hosts. 2023/06/19 15:10:40 fuzzer started 2023/06/19 15:10:40 dialing manager at localhost:44161 2023/06/19 15:10:40 checking machine... 2023/06/19 15:10:40 checking revisions... [ 35.535588] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:10:40 testing simple program... [ 35.600674] cgroup: Unknown subsys name 'net' [ 35.651409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:10:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa2ee4 RCX=ffffffff83634882 RDX=0000000000000000 RSI=ffffffff863b0c40 RDI=ffffffff85fa2ecc RBP=ffffffff85fa2ee8 RSP=ffff888016837820 R8 =ffffffff863b0c40 R9 =ffff888016837918 R10=0000000000038001 R11=000000000008a6be R12=ffffffff85fa2ee8 R13=ffffffff85fa2ecc R14=ffffffff85fa2ee4 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000256 [---ZAP-] 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 00007fbf32e6f900 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=00007fbf33424650 CR3=000000000e1e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007ffc63fd7f58 CR3=000000000dd74000 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=2030343a30313a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a30313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000