[ 36.374538] BUG: Bad rss-counter state mm:00000000348d17e9 type:MM_FILEPAGES val:33 [ 36.374568] BUG: Bad rss-counter state mm:00000000348d17e9 type:MM_ANONPAGES val:22 [ 36.537596] ================================================================== [ 36.538360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.539145] Read of size 8 at addr ffff88801bc58310 by task sshd/219 [ 36.539829] [ 36.540016] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.540907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.541745] Call Trace: [ 36.542011] [ 36.542251] dump_stack_lvl+0x91/0xf0 [ 36.542662] print_report+0xcc/0x620 [ 36.543073] ? __virt_addr_valid+0x102/0x340 [ 36.543537] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.544060] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.544605] kasan_report+0xbe/0xf0 [ 36.545011] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.545536] vma_interval_tree_remove+0xc75/0xec0 [ 36.546048] vma_prepare+0xc54/0x11a0 [ 36.546455] __split_vma+0x5af/0x950 [ 36.546858] ? __pfx___split_vma+0x10/0x10 [ 36.547306] ? find_held_lock+0x2c/0x110 [ 36.547746] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.548222] ? lock_is_held_type+0x9f/0x120 [ 36.548684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.549193] ? mtree_range_walk+0x632/0x900 [ 36.549665] ? mas_walk+0x5c7/0x7c0 [ 36.550065] do_vmi_munmap+0x1f1/0x2b0 [ 36.550481] mmap_region+0x1f9/0x2660 [ 36.550896] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.551331] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.551943] ? __pfx_lock_acquire+0x10/0x10 [ 36.552405] ? __pfx_mmap_region+0x10/0x10 [ 36.552847] ? security_mmap_addr+0x7d/0xa0 [ 36.553295] ? get_unmapped_area+0x1f5/0x3f0 [ 36.553758] do_mmap+0x854/0xf00 [ 36.554131] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.554547] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.555023] ksys_mmap_pgoff+0x3af/0x500 [ 36.555443] do_syscall_64+0x3f/0x90 [ 36.555837] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.556400] RIP: 0033:0x7f614dcf3d82 [ 36.556777] 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 [ 36.558542] RSP: 002b:00007ffd12c3c738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.559302] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f614dcf3d82 [ 36.560009] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f614d12d000 [ 36.560732] RBP: 00007f614d12d000 R08: 0000000000000009 R09: 0000000000001000 [ 36.561445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0a6920ec0 [ 36.562157] R13: 00007ffd12c3c750 R14: 00007ffd12c3c780 R15: 00007ffd12c3cae0 [ 36.562866] [ 36.563108] [ 36.563292] Allocated by task 208: [ 36.563652] kasan_save_stack+0x22/0x50 [ 36.564074] kasan_set_track+0x25/0x30 [ 36.564504] __kasan_slab_alloc+0x59/0x70 [ 36.564945] kmem_cache_alloc+0x16b/0x370 [ 36.565374] vm_area_dup+0x20/0x160 [ 36.565755] __split_vma+0x170/0x950 [ 36.566145] split_vma+0xc6/0x110 [ 36.566519] mprotect_fixup+0x8d2/0xb30 [ 36.566939] do_mprotect_pkey+0x87e/0xd40 [ 36.567376] __x64_sys_mprotect+0x78/0xc0 [ 36.567815] do_syscall_64+0x3f/0x90 [ 36.568206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.568748] [ 36.568931] Freed by task 203: [ 36.569259] kasan_save_stack+0x22/0x50 [ 36.569676] kasan_set_track+0x25/0x30 [ 36.570089] kasan_save_free_info+0x2b/0x50 [ 36.570534] __kasan_slab_free+0x10a/0x190 [ 36.570974] kmem_cache_free+0x10d/0x4d0 [ 36.571396] rcu_core+0x8c8/0x2860 [ 36.571766] __do_softirq+0x1b7/0x7d4 [ 36.572163] [ 36.572350] Last potentially related work creation: [ 36.572840] kasan_save_stack+0x22/0x50 [ 36.573266] __kasan_record_aux_stack+0x8e/0xa0 [ 36.573749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.574281] remove_vma+0x139/0x170 [ 36.574656] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.575113] do_vmi_munmap+0x1f1/0x2b0 [ 36.575516] __vm_munmap+0x138/0x3a0 [ 36.575898] __x64_sys_munmap+0x59/0x80 [ 36.576307] do_syscall_64+0x3f/0x90 [ 36.576723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.577253] [ 36.577430] The buggy address belongs to the object at ffff88801bc582b8 [ 36.577430] which belongs to the cache vm_area_struct of size 168 [ 36.578644] The buggy address is located 88 bytes inside of [ 36.578644] freed 168-byte region [ffff88801bc582b8, ffff88801bc58360) [ 36.579808] [ 36.579988] The buggy address belongs to the physical page: [ 36.580547] page:000000003d8bd266 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc58 [ 36.581441] memcg:ffff88801a3dfc01 [ 36.581795] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.582338] page_type: 0xffffffff() [ 36.582715] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.583477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3dfc01 [ 36.584231] page dumped because: kasan: bad access detected [ 36.584783] [ 36.584961] Memory state around the buggy address: [ 36.585441] ffff88801bc58200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 36.586143] ffff88801bc58280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.586847] >ffff88801bc58300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.587551] ^ [ 36.587942] ffff88801bc58380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.588666] ffff88801bc58400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.589367] ================================================================== [ 36.590364] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.321287] BUG: Bad rss-counter state mm:000000000a4fe792 type:MM_FILEPAGES val:33 [ 38.322460] BUG: Bad rss-counter state mm:000000000a4fe792 type:MM_ANONPAGES val:22 [ 38.747460] BUG: Bad rss-counter state mm:00000000dbe7cdfd type:MM_FILEPAGES val:33 [ 38.748171] BUG: Bad rss-counter state mm:00000000dbe7cdfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45543' (ECDSA) to the list of known hosts. 2023/06/20 03:35:14 fuzzer started 2023/06/20 03:35:15 dialing manager at localhost:44161 2023/06/20 03:35:15 checking machine... 2023/06/20 03:35:15 checking revisions... [ 39.442134] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:35:15 testing simple program... [ 39.495836] cgroup: Unknown subsys name 'net' [ 39.552286] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:35:09 Registers: info registers vcpu 0 RAX=00000016880cd408 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=00000000000540ec RBP=ffff88806ce28140 RSP=ffff88800f6efe28 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f09dc R11=0000000000000001 R12=00000000000540ec R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5c321e8900 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=00007f5c32d8b0f0 CR3=000000000b374000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000058 RBX=ffff88800bb10000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffff88800bb100b8 RSP=ffff88800f61fc80 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000000 R12=0000000000010177 R13=ffff88800bb10000 R14=ffffed1001762001 R15=ffffffff85a237a0 RIP=ffffffff821920cf RFL=00000093 [--S-A-C] 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 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=00007feb7876a540 CR3=000000000d5f4000 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=63950937223189a8724fbb7b2d28ce29 XMM02=000000000011dd78ec2efd57dc4c00df XMM03=0000000000123a88b4f39e2457e852d3 XMM04=eda3ce6b30ad716500000000000ae988 XMM05=dfcdbad4f1609c370000000000133fd8 XMM06=c573f115e92779c90000000000133178 XMM07=e042d86d42eb936e0000000000123d60 XMM08=b4f39e2457e852d3000000000011ddd8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000