[ 24.018284] BUG: Bad rss-counter state mm:00000000ce566a03 type:MM_FILEPAGES val:33 [ 24.019571] BUG: Bad rss-counter state mm:00000000ce566a03 type:MM_ANONPAGES val:22 [ 24.175761] ================================================================== [ 24.176679] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.177635] Read of size 8 at addr ffff888017f9d798 by task sshd/220 [ 24.178533] [ 24.178758] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.179619] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.180629] Call Trace: [ 24.180952] [ 24.181246] dump_stack_lvl+0x91/0xf0 [ 24.181745] print_report+0xcc/0x620 [ 24.182229] ? __virt_addr_valid+0x102/0x340 [ 24.182779] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.183404] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.184027] kasan_report+0xbe/0xf0 [ 24.184502] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.185122] vma_interval_tree_remove+0xc75/0xec0 [ 24.185748] vma_prepare+0xc54/0x11a0 [ 24.186231] __split_vma+0x5af/0x950 [ 24.186704] ? __pfx___split_vma+0x10/0x10 [ 24.187248] ? find_held_lock+0x2c/0x110 [ 24.187769] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.188344] ? lock_is_held_type+0x9f/0x120 [ 24.188885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.189570] ? mtree_range_walk+0x632/0x900 [ 24.190133] ? mas_walk+0x5c7/0x7c0 [ 24.190613] do_vmi_munmap+0x1f1/0x2b0 [ 24.191112] mmap_region+0x1f9/0x2660 [ 24.191595] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.192114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.192837] ? __pfx_lock_acquire+0x10/0x10 [ 24.193384] ? __pfx_mmap_region+0x10/0x10 [ 24.193914] ? security_mmap_addr+0x7d/0xa0 [ 24.194462] ? get_unmapped_area+0x1f5/0x3f0 [ 24.195023] do_mmap+0x854/0xf00 [ 24.195469] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.195975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.196549] ksys_mmap_pgoff+0x3af/0x500 [ 24.197071] do_syscall_64+0x3f/0x90 [ 24.197572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.198224] RIP: 0033:0x7f22913d3d82 [ 24.198684] 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 [ 24.200843] RSP: 002b:00007ffd841d7e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.201780] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f22913d3d82 [ 24.202647] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f229080d000 [ 24.203515] RBP: 00007f229080d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.204383] R10: 0000000000000812 R11: 0000000000000206 R12: 000055963744fec0 [ 24.205253] R13: 00007ffd841d7e80 R14: 00007ffd841d7eb0 R15: 00007ffd841d8210 [ 24.206113] [ 24.206412] [ 24.206630] Allocated by task 213: [ 24.207080] kasan_save_stack+0x22/0x50 [ 24.207599] kasan_set_track+0x25/0x30 [ 24.208136] __kasan_slab_alloc+0x59/0x70 [ 24.208682] kmem_cache_alloc+0x16b/0x370 [ 24.209243] vm_area_dup+0x20/0x160 [ 24.209738] __split_vma+0x170/0x950 [ 24.210265] split_vma+0xc6/0x110 [ 24.210711] mprotect_fixup+0x8d2/0xb30 [ 24.211229] do_mprotect_pkey+0x87e/0xd40 [ 24.211755] __x64_sys_mprotect+0x78/0xc0 [ 24.212287] do_syscall_64+0x3f/0x90 [ 24.212768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.213444] [ 24.213666] Freed by task 213: [ 24.214066] kasan_save_stack+0x22/0x50 [ 24.214574] kasan_set_track+0x25/0x30 [ 24.215070] kasan_save_free_info+0x2b/0x50 [ 24.215604] __kasan_slab_free+0x10a/0x190 [ 24.216145] kmem_cache_free+0x10d/0x4d0 [ 24.216658] rcu_core+0x8c8/0x2860 [ 24.217108] __do_softirq+0x1b7/0x7d4 [ 24.217614] [ 24.217833] Last potentially related work creation: [ 24.218419] kasan_save_stack+0x22/0x50 [ 24.218924] __kasan_record_aux_stack+0x8e/0xa0 [ 24.219499] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.220151] remove_vma+0x139/0x170 [ 24.220609] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.221179] do_vmi_munmap+0x1f1/0x2b0 [ 24.221670] __vm_munmap+0x138/0x3a0 [ 24.222141] __x64_sys_munmap+0x59/0x80 [ 24.222682] do_syscall_64+0x3f/0x90 [ 24.223162] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.223808] [ 24.224034] The buggy address belongs to the object at ffff888017f9d740 [ 24.224034] which belongs to the cache vm_area_struct of size 168 [ 24.225555] The buggy address is located 88 bytes inside of [ 24.225555] freed 168-byte region [ffff888017f9d740, ffff888017f9d7e8) [ 24.226994] [ 24.227214] The buggy address belongs to the physical page: [ 24.227882] page:000000002539bbe9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17f9d [ 24.229013] memcg:ffff88801a36e301 [ 24.229465] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.230120] page_type: 0xffffffff() [ 24.230584] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.231556] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a36e301 [ 24.232498] page dumped because: kasan: bad access detected [ 24.233189] [ 24.233412] Memory state around the buggy address: [ 24.233998] ffff888017f9d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.234865] ffff888017f9d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.235718] >ffff888017f9d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.236603] ^ [ 24.237096] ffff888017f9d800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.238011] ffff888017f9d880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.238871] ================================================================== [ 24.239909] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.991900] BUG: Bad rss-counter state mm:00000000d14a468e type:MM_FILEPAGES val:33 [ 25.993085] BUG: Bad rss-counter state mm:00000000d14a468e type:MM_ANONPAGES val:22 [ 26.388352] BUG: Bad rss-counter state mm:000000001b6770ab type:MM_FILEPAGES val:33 [ 26.389404] BUG: Bad rss-counter state mm:000000001b6770ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39065' (ECDSA) to the list of known hosts. 2023/06/20 23:55:04 fuzzer started 2023/06/20 23:55:04 dialing manager at localhost:36067 2023/06/20 23:55:04 checking machine... 2023/06/20 23:55:04 checking revisions... [ 27.094854] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:55:04 testing simple program... [ 27.147911] cgroup: Unknown subsys name 'net' [ 27.188624] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f091a24b080 CR3=000000000e2c6000 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=2033303a35353a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a35353a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000040 RBX=ffff88806cf09b40 RCX=ffffffff86129a01 RDX=1ffff1100d9e1388 RSI=ffffffff8450cc7f RDI=ffff88806cf09b4c RBP=ffff88806cf09c40 RSP=ffff88806cf09a58 R8 =ffffffff86129ab2 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000001e4ed R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff888017d63680 R15=ffff88800ff55580 RIP=ffffffff813ad553 RFL=00000283 [--S---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 00007eff09341900 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=00007eff0930b008 CR3=000000000e1e6000 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=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