[ 23.850593] BUG: Bad rss-counter state mm:000000005d594637 type:MM_FILEPAGES val:33 [ 23.851486] BUG: Bad rss-counter state mm:000000005d594637 type:MM_ANONPAGES val:22 [ 23.982205] ================================================================== [ 23.982927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.983674] Read of size 8 at addr ffff88800e279310 by task sshd/220 [ 23.984281] [ 23.984460] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.985143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.985922] Call Trace: [ 23.986177] [ 23.986488] dump_stack_lvl+0x91/0xf0 [ 23.986887] print_report+0xcc/0x620 [ 23.987270] ? __virt_addr_valid+0x102/0x340 [ 23.987715] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.988210] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.988714] kasan_report+0xbe/0xf0 [ 23.989095] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.989591] vma_interval_tree_remove+0xc75/0xec0 [ 23.990095] vma_prepare+0xc54/0x11a0 [ 23.990475] __split_vma+0x5af/0x950 [ 23.990825] ? __pfx___split_vma+0x10/0x10 [ 23.991225] ? find_held_lock+0x2c/0x110 [ 23.991600] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.992016] ? lock_is_held_type+0x9f/0x120 [ 23.992416] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.992857] ? mtree_range_walk+0x632/0x900 [ 23.993266] ? mas_walk+0x5c7/0x7c0 [ 23.993613] do_vmi_munmap+0x1f1/0x2b0 [ 23.993980] mmap_region+0x1f9/0x2660 [ 23.994325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.994701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.995222] ? __pfx_lock_acquire+0x10/0x10 [ 23.995612] ? __pfx_mmap_region+0x10/0x10 [ 23.996007] ? security_mmap_addr+0x7d/0xa0 [ 23.996398] ? get_unmapped_area+0x1f5/0x3f0 [ 23.996795] do_mmap+0x854/0xf00 [ 23.997121] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.997481] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.997899] ksys_mmap_pgoff+0x3af/0x500 [ 23.998274] do_syscall_64+0x3f/0x90 [ 23.998625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.999101] RIP: 0033:0x7fcf945acd82 [ 23.999441] 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 [ 24.001007] RSP: 002b:00007ffc67101ac8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.001670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf945acd82 [ 24.002314] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf939e6000 [ 24.002930] RBP: 00007fcf939e6000 R08: 0000000000000009 R09: 0000000000001000 [ 24.003556] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d3d91dd90 [ 24.004177] R13: 00007ffc67101ae0 R14: 00007ffc67101b10 R15: 00007ffc67101e70 [ 24.004811] [ 24.005026] [ 24.005183] Allocated by task 213: [ 24.005504] kasan_save_stack+0x22/0x50 [ 24.005878] kasan_set_track+0x25/0x30 [ 24.006239] __kasan_slab_alloc+0x59/0x70 [ 24.006624] kmem_cache_alloc+0x16b/0x370 [ 24.007001] vm_area_dup+0x20/0x160 [ 24.007336] __split_vma+0x170/0x950 [ 24.007678] split_vma+0xc6/0x110 [ 24.008002] mprotect_fixup+0x8d2/0xb30 [ 24.008369] do_mprotect_pkey+0x87e/0xd40 [ 24.008754] __x64_sys_mprotect+0x78/0xc0 [ 24.009137] do_syscall_64+0x3f/0x90 [ 24.009486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.009979] [ 24.010138] Freed by task 211: [ 24.010423] kasan_save_stack+0x22/0x50 [ 24.010793] kasan_set_track+0x25/0x30 [ 24.011158] kasan_save_free_info+0x2b/0x50 [ 24.011561] __kasan_slab_free+0x10a/0x190 [ 24.011952] kmem_cache_free+0x10d/0x4d0 [ 24.012322] rcu_core+0x8c8/0x2860 [ 24.012651] __do_softirq+0x1b7/0x7d4 [ 24.013003] [ 24.013160] Last potentially related work creation: [ 24.013588] kasan_save_stack+0x22/0x50 [ 24.013967] __kasan_record_aux_stack+0x8e/0xa0 [ 24.014389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.014860] remove_vma+0x139/0x170 [ 24.015190] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.015599] do_vmi_munmap+0x1f1/0x2b0 [ 24.015954] __vm_munmap+0x138/0x3a0 [ 24.016298] __x64_sys_munmap+0x59/0x80 [ 24.016665] do_syscall_64+0x3f/0x90 [ 24.017014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.017483] [ 24.017642] The buggy address belongs to the object at ffff88800e2792b8 [ 24.017642] which belongs to the cache vm_area_struct of size 168 [ 24.018733] The buggy address is located 88 bytes inside of [ 24.018733] freed 168-byte region [ffff88800e2792b8, ffff88800e279360) [ 24.019769] [ 24.019929] The buggy address belongs to the physical page: [ 24.020420] page:0000000016d8c1f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe279 [ 24.021227] memcg:ffff88800e08b101 [ 24.021539] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.022072] page_type: 0xffffffff() [ 24.022404] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.023081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e08b101 [ 24.023753] page dumped because: kasan: bad access detected [ 24.024240] [ 24.024399] Memory state around the buggy address: [ 24.024835] ffff88800e279200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.025459] ffff88800e279280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.026107] >ffff88800e279300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.026733] ^ [ 24.027080] ffff88800e279380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.027711] ffff88800e279400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.028327] ================================================================== [ 24.029095] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.369918] BUG: Bad rss-counter state mm:0000000017797a49 type:MM_FILEPAGES val:33 [ 25.370674] BUG: Bad rss-counter state mm:0000000017797a49 type:MM_ANONPAGES val:22 [ 25.717830] BUG: Bad rss-counter state mm:000000000dbc8b7b type:MM_FILEPAGES val:33 [ 25.718350] BUG: Bad rss-counter state mm:000000000dbc8b7b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55117' (ECDSA) to the list of known hosts. 2023/06/21 04:24:15 fuzzer started 2023/06/21 04:24:15 dialing manager at localhost:36067 2023/06/21 04:24:15 checking machine... 2023/06/21 04:24:15 checking revisions... [ 26.358761] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:24:15 testing simple program... [ 26.409474] cgroup: Unknown subsys name 'net' [ 26.461992] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:24:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016e1ef98 RCX=0000000000000001 RDX=1ffff11002dc3dfe RSI=ffff888016e1fae0 RDI=ffff888016e1ef98 RBP=ffff888016e1eff0 RSP=ffff888016e1ef80 R8 =0000000000000001 R9 =ffff888016e1efd8 R10=0000000000038001 R11=00000000000b3f70 R12=ffff888016e1f060 R13=0000000000000000 R14=ffff888016fc9b40 R15=0000000000092800 RIP=ffffffff8113038e 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 00007f0841a09900 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=000055f3e13a2380 CR3=0000000019aac000 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=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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f153cbfd720 CR3=0000000016498000 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=2034313a34323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a34323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000