syzkaller login: [ 30.110289] BUG: Bad rss-counter state mm:00000000692d834d type:MM_FILEPAGES val:33 [ 30.111061] BUG: Bad rss-counter state mm:00000000692d834d type:MM_ANONPAGES val:22 [ 30.226215] ================================================================== [ 30.227283] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.228415] Read of size 8 at addr ffff8880196d74e0 by task sshd/219 [ 30.229314] [ 30.229570] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.230716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.231869] Call Trace: [ 30.232321] [ 30.232692] dump_stack_lvl+0x91/0xf0 [ 30.233327] print_report+0xcc/0x620 [ 30.233993] ? __virt_addr_valid+0x102/0x340 [ 30.234687] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235472] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.236254] kasan_report+0xbe/0xf0 [ 30.236885] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.237732] vma_interval_tree_remove+0xc75/0xec0 [ 30.238517] vma_prepare+0xc54/0x11a0 [ 30.239129] __split_vma+0x5af/0x950 [ 30.239685] ? __pfx___split_vma+0x10/0x10 [ 30.240405] ? find_held_lock+0x2c/0x110 [ 30.241085] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.241787] ? lock_is_held_type+0x9f/0x120 [ 30.242361] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.242977] ? mtree_range_walk+0x632/0x900 [ 30.243620] ? mas_walk+0x5c7/0x7c0 [ 30.244173] do_vmi_munmap+0x1f1/0x2b0 [ 30.244767] mmap_region+0x1f9/0x2660 [ 30.245361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.245989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.246840] ? __pfx_lock_acquire+0x10/0x10 [ 30.247472] ? __pfx_mmap_region+0x10/0x10 [ 30.248087] ? security_mmap_addr+0x7d/0xa0 [ 30.248653] ? get_unmapped_area+0x1f5/0x3f0 [ 30.249208] do_mmap+0x854/0xf00 [ 30.249700] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.250197] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.250769] ksys_mmap_pgoff+0x3af/0x500 [ 30.251287] do_syscall_64+0x3f/0x90 [ 30.251783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.252459] RIP: 0033:0x7fd9a9005d82 [ 30.252915] 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 [ 30.255128] RSP: 002b:00007ffe086477e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.256058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9a9005d82 [ 30.256955] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9a843f000 [ 30.257860] RBP: 00007fd9a843f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.258708] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff6af6db20 [ 30.259581] R13: 00007ffe08647800 R14: 00007ffe08647830 R15: 00007ffe08647b90 [ 30.260471] [ 30.260774] [ 30.261001] Allocated by task 212: [ 30.261474] kasan_save_stack+0x22/0x50 [ 30.262004] kasan_set_track+0x25/0x30 [ 30.262504] __kasan_slab_alloc+0x59/0x70 [ 30.263050] kmem_cache_alloc+0x16b/0x370 [ 30.263583] vm_area_dup+0x20/0x160 [ 30.264043] __split_vma+0x170/0x950 [ 30.264556] split_vma+0xc6/0x110 [ 30.265021] mprotect_fixup+0x8d2/0xb30 [ 30.265587] do_mprotect_pkey+0x87e/0xd40 [ 30.266141] __x64_sys_mprotect+0x78/0xc0 [ 30.266667] do_syscall_64+0x3f/0x90 [ 30.267159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267826] [ 30.268047] Freed by task 212: [ 30.268474] kasan_save_stack+0x22/0x50 [ 30.269006] kasan_set_track+0x25/0x30 [ 30.269570] kasan_save_free_info+0x2b/0x50 [ 30.270137] __kasan_slab_free+0x10a/0x190 [ 30.270696] kmem_cache_free+0x10d/0x4d0 [ 30.271297] rcu_core+0x8c8/0x2860 [ 30.271746] __do_softirq+0x1b7/0x7d4 [ 30.272252] [ 30.272511] Last potentially related work creation: [ 30.273129] kasan_save_stack+0x22/0x50 [ 30.273699] __kasan_record_aux_stack+0x8e/0xa0 [ 30.274301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.274977] remove_vma+0x139/0x170 [ 30.275458] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.276030] do_vmi_munmap+0x1f1/0x2b0 [ 30.276566] __vm_munmap+0x138/0x3a0 [ 30.277074] __x64_sys_munmap+0x59/0x80 [ 30.277637] do_syscall_64+0x3f/0x90 [ 30.278149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278828] [ 30.279056] The buggy address belongs to the object at ffff8880196d7488 [ 30.279056] which belongs to the cache vm_area_struct of size 168 [ 30.280541] The buggy address is located 88 bytes inside of [ 30.280541] freed 168-byte region [ffff8880196d7488, ffff8880196d7530) [ 30.282102] [ 30.282334] The buggy address belongs to the physical page: [ 30.283045] page:00000000adc61085 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x196d7 [ 30.284238] memcg:ffff88800e7fe101 [ 30.284716] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.285463] page_type: 0xffffffff() [ 30.285956] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.286951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7fe101 [ 30.287887] page dumped because: kasan: bad access detected [ 30.288611] [ 30.288850] Memory state around the buggy address: [ 30.289522] ffff8880196d7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.290458] ffff8880196d7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.291374] >ffff8880196d7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292282] ^ [ 30.293052] ffff8880196d7500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.294004] ffff8880196d7580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.294928] ================================================================== [ 30.295912] Disabling lock debugging due to kernel taint [ 32.123800] BUG: Bad rss-counter state mm:0000000091103e32 type:MM_FILEPAGES val:33 [ 32.125338] BUG: Bad rss-counter state mm:0000000091103e32 type:MM_ANONPAGES val:22 [ 32.678934] BUG: Bad rss-counter state mm:00000000e603e81b type:MM_FILEPAGES val:33 [ 32.680086] BUG: Bad rss-counter state mm:00000000e603e81b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9859' (ECDSA) to the list of known hosts. 2023/06/20 18:09:00 fuzzer started 2023/06/20 18:09:00 dialing manager at localhost:36067 2023/06/20 18:09:00 checking machine... 2023/06/20 18:09:00 checking revisions... [ 33.291731] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:09:01 testing simple program... [ 33.344075] cgroup: Unknown subsys name 'net' [ 33.400725] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:09:00 Registers: info registers vcpu 0 RAX=ffffffff85d98e9c RBX=ffffffff85d98e88 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff860a1416 RDI=ffffffff85d98e78 RBP=ffffffff85d98e8c RSP=ffff88806ce099e0 R8 =ffffffff860a1416 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d98e9c R13=ffffffff85d98e78 R14=ffffffff85d98e88 R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000202 [-------] 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=00007fb2028d3040 CR3=00000000197e4000 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=2030303a39303a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a39303a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff1100330fe78 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801987f3a8 R8 =0000000000000001 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d84b8 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---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 00007f5ceeb6a900 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=00007fff704b3000 CR3=000000001cd78000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000