syzkaller login: [ 30.291320] BUG: Bad rss-counter state mm:000000006e7d7471 type:MM_FILEPAGES val:33 [ 30.292669] BUG: Bad rss-counter state mm:000000006e7d7471 type:MM_ANONPAGES val:22 [ 30.368262] ================================================================== [ 30.369162] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.370112] Read of size 8 at addr ffff88800def85c8 by task sshd/221 [ 30.370905] [ 30.371137] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.372129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.373119] Call Trace: [ 30.373439] [ 30.373723] dump_stack_lvl+0x91/0xf0 [ 30.374230] print_report+0xcc/0x620 [ 30.374736] ? __virt_addr_valid+0x102/0x340 [ 30.375301] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.375941] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.376599] kasan_report+0xbe/0xf0 [ 30.377081] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.377706] vma_interval_tree_remove+0xc75/0xec0 [ 30.378320] vma_prepare+0xc54/0x11a0 [ 30.378800] __split_vma+0x5af/0x950 [ 30.379290] ? __pfx___split_vma+0x10/0x10 [ 30.379827] ? find_held_lock+0x2c/0x110 [ 30.380377] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.380949] ? lock_is_held_type+0x9f/0x120 [ 30.381489] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.382099] ? mtree_range_walk+0x632/0x900 [ 30.382660] ? mas_walk+0x5c7/0x7c0 [ 30.383140] do_vmi_munmap+0x1f1/0x2b0 [ 30.383640] mmap_region+0x1f9/0x2660 [ 30.384134] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.384650] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.385367] ? __pfx_lock_acquire+0x10/0x10 [ 30.385908] ? __pfx_mmap_region+0x10/0x10 [ 30.386446] ? security_mmap_addr+0x7d/0xa0 [ 30.386985] ? get_unmapped_area+0x1f5/0x3f0 [ 30.387544] do_mmap+0x854/0xf00 [ 30.387997] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.388799] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.389575] ksys_mmap_pgoff+0x3af/0x500 [ 30.390265] do_syscall_64+0x3f/0x90 [ 30.390908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.391794] RIP: 0033:0x7f2a8c222d82 [ 30.392442] 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 [ 30.395542] RSP: 002b:00007fff3f2ed958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.396900] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a8c222d82 [ 30.397597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a8b65c000 [ 30.398217] RBP: 00007f2a8b65c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.398836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562a3e4acec0 [ 30.399455] R13: 00007fff3f2ed970 R14: 00007fff3f2ed9a0 R15: 00007fff3f2edd00 [ 30.400083] [ 30.400303] [ 30.400464] Allocated by task 214: [ 30.400778] kasan_save_stack+0x22/0x50 [ 30.401151] kasan_set_track+0x25/0x30 [ 30.401512] __kasan_slab_alloc+0x59/0x70 [ 30.401897] kmem_cache_alloc+0x16b/0x370 [ 30.402279] vm_area_dup+0x20/0x160 [ 30.402615] __split_vma+0x170/0x950 [ 30.402958] split_vma+0xc6/0x110 [ 30.403282] mprotect_fixup+0x8d2/0xb30 [ 30.403654] do_mprotect_pkey+0x87e/0xd40 [ 30.404051] __x64_sys_mprotect+0x78/0xc0 [ 30.404497] do_syscall_64+0x3f/0x90 [ 30.404909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405465] [ 30.405653] Freed by task 214: [ 30.405990] kasan_save_stack+0x22/0x50 [ 30.406424] kasan_set_track+0x25/0x30 [ 30.406845] kasan_save_free_info+0x2b/0x50 [ 30.407306] __kasan_slab_free+0x10a/0x190 [ 30.407763] kmem_cache_free+0x10d/0x4d0 [ 30.408204] rcu_core+0x8c8/0x2860 [ 30.408588] __do_softirq+0x1b7/0x7d4 [ 30.408996] [ 30.409186] Last potentially related work creation: [ 30.409685] kasan_save_stack+0x22/0x50 [ 30.410115] __kasan_record_aux_stack+0x8e/0xa0 [ 30.410607] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.411156] remove_vma+0x139/0x170 [ 30.411553] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.412043] do_vmi_munmap+0x1f1/0x2b0 [ 30.412424] __vm_munmap+0x138/0x3a0 [ 30.412767] __x64_sys_munmap+0x59/0x80 [ 30.413138] do_syscall_64+0x3f/0x90 [ 30.413487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.413962] [ 30.414122] Second to last potentially related work creation: [ 30.414623] kasan_save_stack+0x22/0x50 [ 30.414992] __kasan_record_aux_stack+0x8e/0xa0 [ 30.415410] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.415884] remove_vma+0x139/0x170 [ 30.416231] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.416643] do_vmi_munmap+0x1f1/0x2b0 [ 30.417000] mmap_region+0x1f9/0x2660 [ 30.417355] do_mmap+0x854/0xf00 [ 30.417678] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.418039] ksys_mmap_pgoff+0x3af/0x500 [ 30.418413] do_syscall_64+0x3f/0x90 [ 30.418760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.419235] [ 30.419396] The buggy address belongs to the object at ffff88800def8570 [ 30.419396] which belongs to the cache vm_area_struct of size 168 [ 30.420479] The buggy address is located 88 bytes inside of [ 30.420479] freed 168-byte region [ffff88800def8570, ffff88800def8618) [ 30.421509] [ 30.421674] The buggy address belongs to the physical page: [ 30.422159] page:0000000009c2a261 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdef8 [ 30.422948] memcg:ffff88800dc36101 [ 30.423267] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.423740] page_type: 0xffffffff() [ 30.424090] raw: 0100000000000200 ffff8880087a0c80 ffffea0000393740 dead000000000002 [ 30.424772] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc36101 [ 30.425429] page dumped because: kasan: bad access detected [ 30.425910] [ 30.426069] Memory state around the buggy address: [ 30.426493] ffff88800def8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.427113] ffff88800def8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.427737] >ffff88800def8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.428390] ^ [ 30.428872] ffff88800def8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.429498] ffff88800def8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.430115] ================================================================== [ 30.430919] Disabling lock debugging due to kernel taint [ 32.401705] BUG: Bad rss-counter state mm:0000000093cc8c9a type:MM_FILEPAGES val:33 [ 32.402686] BUG: Bad rss-counter state mm:0000000093cc8c9a type:MM_ANONPAGES val:22 [ 32.873293] BUG: Bad rss-counter state mm:00000000c39b44b2 type:MM_FILEPAGES val:33 [ 32.874944] BUG: Bad rss-counter state mm:00000000c39b44b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37113' (ECDSA) to the list of known hosts. 2023/06/20 15:44:54 fuzzer started 2023/06/20 15:44:55 dialing manager at localhost:36067 2023/06/20 15:44:55 checking machine... 2023/06/20 15:44:55 checking revisions... [ 33.631843] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:44:55 testing simple program... [ 33.677652] cgroup: Unknown subsys name 'net' [ 33.744045] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:54 Registers: info registers vcpu 0 RAX=0000000005b100f3 RBX=0000000032cd7e10 RCX=ffff88806cabf080 RDX=ba5be7076ac59300 RSI=ffffffff84537da7 RDI=0000000000000000 RBP=ffff88800f6d9b10 RSP=ffff888008d9f9d0 R8 =0000000069581d57 R9 =ffff888008d9f940 R10=0000000000038001 R11=0000000000000128 R12=0000000000000000 R13=0000000000000000 R14=ffff888008d9fa38 R15=0000000000000008 RIP=ffffffff822703fd 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 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=00007fe464be78e0 CR3=000000000ca2c000 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=f1188ef902097a89b049584e2dbcc779 XMM02=000000000011a968eff9b2d0a8fce9cb XMM03=000000000011aa382c67c8bc2e329bc3 XMM04=28e21034a8fe4cfe00000000000ae988 XMM05=d5dd2ad9984181830000000000133f08 XMM06=c291bd5c70af25b90000000000132fb8 XMM07=fb795ef6d65770560000000000121f08 XMM08=2c67c8bc2e329bc3000000000011a9d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=1ffffffff0c271d2 RDI=ffffffff85dfe000 RBP=ffff88801990f8d0 RSP=ffff88801990f808 R8 =ffffffff86138e62 R9 =ffff88801990f8b8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801990f8d8 R13=ffff88801990f8c0 R14=ffff88801990f8b9 R15=ffff88801990f878 RIP=ffffffff81130a5b 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 00007f25de3c0900 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=00007f25de9780b0 CR3=00000000160e0000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000