[ 36.423353] BUG: Bad rss-counter state mm:00000000e869599a type:MM_FILEPAGES val:33 [ 36.425573] BUG: Bad rss-counter state mm:00000000e869599a type:MM_ANONPAGES val:22 [ 36.601614] ================================================================== [ 36.602927] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.604211] Read of size 8 at addr ffff88800edbda50 by task sshd/218 [ 36.605277] [ 36.605594] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.606778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.608108] Call Trace: [ 36.608551] [ 36.608949] dump_stack_lvl+0x91/0xf0 [ 36.609628] print_report+0xcc/0x620 [ 36.610302] ? __virt_addr_valid+0x102/0x340 [ 36.611075] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.611946] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.612804] kasan_report+0xbe/0xf0 [ 36.613473] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.614363] vma_interval_tree_remove+0xc75/0xec0 [ 36.615212] vma_prepare+0xc54/0x11a0 [ 36.615888] __split_vma+0x5af/0x950 [ 36.616554] ? __pfx___split_vma+0x10/0x10 [ 36.617303] ? find_held_lock+0x2c/0x110 [ 36.618037] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.618816] ? lock_is_held_type+0x9f/0x120 [ 36.619573] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.620415] ? mtree_range_walk+0x632/0x900 [ 36.621178] ? mas_walk+0x5c7/0x7c0 [ 36.621856] do_vmi_munmap+0x1f1/0x2b0 [ 36.622543] mmap_region+0x1f9/0x2660 [ 36.623220] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.623945] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.624937] ? __pfx_lock_acquire+0x10/0x10 [ 36.625705] ? __pfx_mmap_region+0x10/0x10 [ 36.626461] ? security_mmap_addr+0x7d/0xa0 [ 36.627212] ? get_unmapped_area+0x1f5/0x3f0 [ 36.627975] do_mmap+0x854/0xf00 [ 36.628598] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.629286] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.630068] ksys_mmap_pgoff+0x3af/0x500 [ 36.630695] do_syscall_64+0x3f/0x90 [ 36.631276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.632058] RIP: 0033:0x7fc46b76dd82 [ 36.632617] 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 [ 36.635234] RSP: 002b:00007fff8e18d578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.636345] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc46b76dd82 [ 36.637386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc46aba7000 [ 36.638397] RBP: 00007fc46aba7000 R08: 0000000000000009 R09: 0000000000001000 [ 36.639243] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf1821ef70 [ 36.640081] R13: 00007fff8e18d590 R14: 00007fff8e18d5c0 R15: 00007fff8e18d920 [ 36.640937] [ 36.641233] [ 36.641448] Allocated by task 211: [ 36.641883] kasan_save_stack+0x22/0x50 [ 36.642392] kasan_set_track+0x25/0x30 [ 36.642892] __kasan_slab_alloc+0x59/0x70 [ 36.643475] kmem_cache_alloc+0x16b/0x370 [ 36.644001] vm_area_dup+0x20/0x160 [ 36.644454] __split_vma+0x170/0x950 [ 36.644922] split_vma+0xc6/0x110 [ 36.645361] mprotect_fixup+0x8d2/0xb30 [ 36.645887] do_mprotect_pkey+0x87e/0xd40 [ 36.646416] __x64_sys_mprotect+0x78/0xc0 [ 36.646945] do_syscall_64+0x3f/0x90 [ 36.647433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.648073] [ 36.648291] Freed by task 211: [ 36.648679] kasan_save_stack+0x22/0x50 [ 36.649178] kasan_set_track+0x25/0x30 [ 36.649681] kasan_save_free_info+0x2b/0x50 [ 36.650212] __kasan_slab_free+0x10a/0x190 [ 36.650741] kmem_cache_free+0x10d/0x4d0 [ 36.651248] rcu_core+0x8c8/0x2860 [ 36.651700] __do_softirq+0x1b7/0x7d4 [ 36.652172] [ 36.652390] Last potentially related work creation: [ 36.652973] kasan_save_stack+0x22/0x50 [ 36.653474] __kasan_record_aux_stack+0x8e/0xa0 [ 36.654054] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.654699] remove_vma+0x139/0x170 [ 36.655149] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.655704] do_vmi_munmap+0x1f1/0x2b0 [ 36.656193] __vm_munmap+0x138/0x3a0 [ 36.656662] __x64_sys_munmap+0x59/0x80 [ 36.657158] do_syscall_64+0x3f/0x90 [ 36.657651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.658294] [ 36.658513] Second to last potentially related work creation: [ 36.659191] kasan_save_stack+0x22/0x50 [ 36.659699] __kasan_record_aux_stack+0x8e/0xa0 [ 36.660272] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.660919] remove_vma+0x139/0x170 [ 36.661371] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.661932] do_vmi_munmap+0x1f1/0x2b0 [ 36.662425] mmap_region+0x1f9/0x2660 [ 36.662900] do_mmap+0x854/0xf00 [ 36.663335] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.663824] ksys_mmap_pgoff+0x3af/0x500 [ 36.664327] do_syscall_64+0x3f/0x90 [ 36.664801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.665446] [ 36.665684] The buggy address belongs to the object at ffff88800edbd9f8 [ 36.665684] which belongs to the cache vm_area_struct of size 168 [ 36.667178] The buggy address is located 88 bytes inside of [ 36.667178] freed 168-byte region [ffff88800edbd9f8, ffff88800edbdaa0) [ 36.668625] [ 36.668837] The buggy address belongs to the physical page: [ 36.669510] page:0000000059330dfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedbd [ 36.670599] memcg:ffff888009c2d601 [ 36.671022] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.671665] page_type: 0xffffffff() [ 36.672121] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7b00 dead000000000004 [ 36.673046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009c2d601 [ 36.673953] page dumped because: kasan: bad access detected [ 36.674608] [ 36.674823] Memory state around the buggy address: [ 36.675401] ffff88800edbd900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.676247] ffff88800edbd980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.677101] >ffff88800edbda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.677961] ^ [ 36.678661] ffff88800edbda80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.679530] ffff88800edbdb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.680385] ================================================================== [ 36.681426] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.738303] BUG: Bad rss-counter state mm:000000007a31cdaa type:MM_FILEPAGES val:33 [ 38.739540] BUG: Bad rss-counter state mm:000000007a31cdaa type:MM_ANONPAGES val:22 [ 39.209496] BUG: Bad rss-counter state mm:00000000a5f2bf57 type:MM_FILEPAGES val:33 [ 39.210513] BUG: Bad rss-counter state mm:00000000a5f2bf57 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23371' (ECDSA) to the list of known hosts. 2023/06/19 21:01:02 fuzzer started 2023/06/19 21:01:02 dialing manager at localhost:44161 2023/06/19 21:01:02 checking machine... 2023/06/19 21:01:02 checking revisions... [ 39.937923] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:03 testing simple program... [ 39.991632] cgroup: Unknown subsys name 'net' [ 40.036776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:00:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f4ed991e008 CR3=000000000de4e000 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=2032303a31303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a31303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86127e3c RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86127e3e RBP=ffff888019cef1b0 RSP=ffff888019cef0e8 R8 =0000000000000001 R9 =ffff888019cef198 R10=0000000000038001 R11=000000000001e468 R12=ffff888019cef1b8 R13=ffff888019cef1a0 R14=ffff888019ceff28 R15=ffff888019cef158 RIP=ffffffff81131204 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 00007f1369909900 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=00007f13698e8020 CR3=00000000094d8000 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