syzkaller login: [ 33.083064] BUG: Bad rss-counter state mm:00000000195df48f type:MM_FILEPAGES val:33 [ 33.083844] BUG: Bad rss-counter state mm:00000000195df48f type:MM_ANONPAGES val:22 [ 33.254996] ================================================================== [ 33.256210] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.257546] Read of size 8 at addr ffff88800dd8adf0 by task sshd/219 [ 33.258431] [ 33.258680] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.259656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.260754] Call Trace: [ 33.261118] [ 33.261438] dump_stack_lvl+0x91/0xf0 [ 33.262006] print_report+0xcc/0x620 [ 33.262565] ? __virt_addr_valid+0x102/0x340 [ 33.263192] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.263899] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.264597] kasan_report+0xbe/0xf0 [ 33.265151] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.265874] vma_interval_tree_remove+0xc75/0xec0 [ 33.266673] vma_prepare+0xc54/0x11a0 [ 33.267182] __split_vma+0x5af/0x950 [ 33.267686] ? __pfx___split_vma+0x10/0x10 [ 33.268232] ? find_held_lock+0x2c/0x110 [ 33.268765] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.269328] ? lock_is_held_type+0x9f/0x120 [ 33.269869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.270516] ? mtree_range_walk+0x632/0x900 [ 33.271083] ? mas_walk+0x5c7/0x7c0 [ 33.271558] do_vmi_munmap+0x1f1/0x2b0 [ 33.272058] mmap_region+0x1f9/0x2660 [ 33.272547] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.273059] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.273781] ? __pfx_lock_acquire+0x10/0x10 [ 33.274330] ? __pfx_mmap_region+0x10/0x10 [ 33.274862] ? security_mmap_addr+0x7d/0xa0 [ 33.275391] ? get_unmapped_area+0x1f5/0x3f0 [ 33.275943] do_mmap+0x854/0xf00 [ 33.276384] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.276878] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.277438] ksys_mmap_pgoff+0x3af/0x500 [ 33.277965] do_syscall_64+0x3f/0x90 [ 33.278445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.279101] RIP: 0033:0x7f83fade3d82 [ 33.279560] 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 [ 33.281702] RSP: 002b:00007ffc6aa1dd08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.282633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f83fade3d82 [ 33.283481] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83fa21d000 [ 33.284329] RBP: 00007f83fa21d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.285171] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bab0a3bf60 [ 33.286030] R13: 00007ffc6aa1dd20 R14: 00007ffc6aa1dd50 R15: 00007ffc6aa1e0b0 [ 33.286892] [ 33.287183] [ 33.287398] Allocated by task 212: [ 33.287839] kasan_save_stack+0x22/0x50 [ 33.288347] kasan_set_track+0x25/0x30 [ 33.288848] __kasan_slab_alloc+0x59/0x70 [ 33.289375] kmem_cache_alloc+0x16b/0x370 [ 33.289890] vm_area_dup+0x20/0x160 [ 33.290377] __split_vma+0x170/0x950 [ 33.290847] split_vma+0xc6/0x110 [ 33.291291] mprotect_fixup+0x8d2/0xb30 [ 33.291795] do_mprotect_pkey+0x87e/0xd40 [ 33.292315] __x64_sys_mprotect+0x78/0xc0 [ 33.292829] do_syscall_64+0x3f/0x90 [ 33.293303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.293948] [ 33.294164] Freed by task 212: [ 33.294563] kasan_save_stack+0x22/0x50 [ 33.295064] kasan_set_track+0x25/0x30 [ 33.295557] kasan_save_free_info+0x2b/0x50 [ 33.296089] __kasan_slab_free+0x10a/0x190 [ 33.296622] kmem_cache_free+0x10d/0x4d0 [ 33.297135] rcu_core+0x8c8/0x2860 [ 33.297584] __do_softirq+0x1b7/0x7d4 [ 33.298067] [ 33.298282] Last potentially related work creation: [ 33.298874] kasan_save_stack+0x22/0x50 [ 33.299378] __kasan_record_aux_stack+0x8e/0xa0 [ 33.299954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.300601] remove_vma+0x139/0x170 [ 33.301051] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.301608] do_vmi_munmap+0x1f1/0x2b0 [ 33.302117] __vm_munmap+0x138/0x3a0 [ 33.302587] __x64_sys_munmap+0x59/0x80 [ 33.303082] do_syscall_64+0x3f/0x90 [ 33.303555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.304191] [ 33.304407] The buggy address belongs to the object at ffff88800dd8ad98 [ 33.304407] which belongs to the cache vm_area_struct of size 168 [ 33.305875] The buggy address is located 88 bytes inside of [ 33.305875] freed 168-byte region [ffff88800dd8ad98, ffff88800dd8ae40) [ 33.307290] [ 33.307508] The buggy address belongs to the physical page: [ 33.308164] page:0000000027541c4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd8a [ 33.309263] memcg:ffff88801422bd01 [ 33.309687] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.310336] page_type: 0xffffffff() [ 33.310784] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.311703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801422bd01 [ 33.312608] page dumped because: kasan: bad access detected [ 33.313267] [ 33.313482] Memory state around the buggy address: [ 33.314088] ffff88800dd8ac80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 33.314944] ffff88800dd8ad00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 33.315803] >ffff88800dd8ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.316655] ^ [ 33.317459] ffff88800dd8ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.318327] ffff88800dd8ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.319192] ================================================================== [ 33.320266] Disabling lock debugging due to kernel taint [ 35.283488] BUG: Bad rss-counter state mm:00000000441a814c type:MM_FILEPAGES val:33 [ 35.284545] BUG: Bad rss-counter state mm:00000000441a814c type:MM_ANONPAGES val:22 [ 35.729570] BUG: Bad rss-counter state mm:00000000b15e4d7f type:MM_FILEPAGES val:33 [ 35.730338] BUG: Bad rss-counter state mm:00000000b15e4d7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42892' (ECDSA) to the list of known hosts. 2023/06/19 20:31:14 fuzzer started 2023/06/19 20:31:14 dialing manager at localhost:44161 2023/06/19 20:31:14 checking machine... 2023/06/19 20:31:14 checking revisions... [ 36.442889] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:31:15 testing simple program... [ 36.500337] cgroup: Unknown subsys name 'net' [ 36.539145] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:31:11 Registers: info registers vcpu 0 RAX=ffffffff86096756 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86096756 RDI=ffffffff85d91630 RBP=ffff888008d7f9d0 RSP=ffff888008d7f8b0 R8 =ffffffff86096756 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff888008d7f9d8 R13=ffff888008d7f9c0 R14=ffff888008d7f9b9 R15=ffff888008d7f978 RIP=ffffffff8112fcc1 RFL=00000282 [--S----] 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=00007fe099d08d20 CR3=000000000d84a000 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=31333a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303730 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8363c466 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001dfcf4b RSI=ffffffff8363c466 RDI=ffff88800efe7ac8 RBP=ffff88800efe7a98 RSP=ffff88800efe79f8 R8 =0000000000000001 R9 =ffff88800efe7a40 R10=0000000000038001 R11=0000000000091a6c R12=ffff88800efe7ac8 R13=0000000000000000 R14=ffff8880166b3680 R15=ffff888016ae2d10 RIP=ffffffff813ad420 RFL=00000286 [--S--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 00007fcc27325900 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=00007fff42f7e000 CR3=000000000e576000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000