[ 23.766761] BUG: Bad rss-counter state mm:000000001da28aa9 type:MM_FILEPAGES val:33 [ 23.767326] BUG: Bad rss-counter state mm:000000001da28aa9 type:MM_ANONPAGES val:22 [ 23.866040] ================================================================== [ 23.867116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.867830] Read of size 8 at addr ffff88800c75a5c8 by task sshd/221 [ 23.868468] [ 23.868649] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.869307] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.870053] Call Trace: [ 23.870295] [ 23.870513] dump_stack_lvl+0x91/0xf0 [ 23.870930] print_report+0xcc/0x620 [ 23.871319] ? __virt_addr_valid+0x102/0x340 [ 23.871743] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.872228] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.872701] kasan_report+0xbe/0xf0 [ 23.873067] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.873547] vma_interval_tree_remove+0xc75/0xec0 [ 23.874015] vma_prepare+0xc54/0x11a0 [ 23.874390] __split_vma+0x5af/0x950 [ 23.874766] ? __pfx___split_vma+0x10/0x10 [ 23.875175] ? find_held_lock+0x2c/0x110 [ 23.875571] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.876005] ? lock_is_held_type+0x9f/0x120 [ 23.876424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.876892] ? mtree_range_walk+0x632/0x900 [ 23.877317] ? mas_walk+0x5c7/0x7c0 [ 23.877683] do_vmi_munmap+0x1f1/0x2b0 [ 23.878062] mmap_region+0x1f9/0x2660 [ 23.878433] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.878847] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.879303] ? __pfx_lock_acquire+0x10/0x10 [ 23.879599] ? __pfx_mmap_region+0x10/0x10 [ 23.879899] ? security_mmap_addr+0x7d/0xa0 [ 23.880225] ? get_unmapped_area+0x1f5/0x3f0 [ 23.880560] do_mmap+0x854/0xf00 [ 23.880832] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.881139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.881477] ksys_mmap_pgoff+0x3af/0x500 [ 23.881781] do_syscall_64+0x3f/0x90 [ 23.882071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.882470] RIP: 0033:0x7f0603bc6d82 [ 23.882756] 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 [ 23.884064] RSP: 002b:00007fff278bb178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.884629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0603bc6d82 [ 23.885140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0603000000 [ 23.885660] RBP: 00007f0603000000 R08: 0000000000000009 R09: 0000000000001000 [ 23.886172] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556049bb0b20 [ 23.886706] R13: 00007fff278bb190 R14: 00007fff278bb1c0 R15: 00007fff278bb520 [ 23.887231] [ 23.887416] [ 23.887549] Allocated by task 214: [ 23.887810] kasan_save_stack+0x22/0x50 [ 23.888110] kasan_set_track+0x25/0x30 [ 23.888401] __kasan_slab_alloc+0x59/0x70 [ 23.888719] kmem_cache_alloc+0x16b/0x370 [ 23.889024] vm_area_dup+0x20/0x160 [ 23.889304] __split_vma+0x170/0x950 [ 23.889593] split_vma+0xc6/0x110 [ 23.889856] mprotect_fixup+0x8d2/0xb30 [ 23.890161] do_mprotect_pkey+0x87e/0xd40 [ 23.890475] __x64_sys_mprotect+0x78/0xc0 [ 23.890799] do_syscall_64+0x3f/0x90 [ 23.891080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.891463] [ 23.891591] Freed by task 0: [ 23.891807] kasan_save_stack+0x22/0x50 [ 23.892105] kasan_set_track+0x25/0x30 [ 23.892406] kasan_save_free_info+0x2b/0x50 [ 23.892718] __kasan_slab_free+0x10a/0x190 [ 23.893032] kmem_cache_free+0x10d/0x4d0 [ 23.893334] rcu_core+0x8c8/0x2860 [ 23.893592] __do_softirq+0x1b7/0x7d4 [ 23.893878] [ 23.894006] Last potentially related work creation: [ 23.894357] kasan_save_stack+0x22/0x50 [ 23.894653] __kasan_record_aux_stack+0x8e/0xa0 [ 23.894998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.895386] remove_vma+0x139/0x170 [ 23.895651] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.895983] do_vmi_munmap+0x1f1/0x2b0 [ 23.896268] __vm_munmap+0x138/0x3a0 [ 23.896547] __x64_sys_munmap+0x59/0x80 [ 23.896833] do_syscall_64+0x3f/0x90 [ 23.897109] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.897485] [ 23.897609] The buggy address belongs to the object at ffff88800c75a570 [ 23.897609] which belongs to the cache vm_area_struct of size 168 [ 23.898463] The buggy address is located 88 bytes inside of [ 23.898463] freed 168-byte region [ffff88800c75a570, ffff88800c75a618) [ 23.899284] [ 23.899405] The buggy address belongs to the physical page: [ 23.899786] page:000000006501095a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc75a [ 23.900395] memcg:ffff88800e0ba001 [ 23.900643] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.901016] page_type: 0xffffffff() [ 23.901276] raw: 0100000000000200 ffff8880087a0c80 ffffea0000262780 0000000000000004 [ 23.901808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0ba001 [ 23.902337] page dumped because: kasan: bad access detected [ 23.902725] [ 23.902851] Memory state around the buggy address: [ 23.903183] ffff88800c75a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.903676] ffff88800c75a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 23.904166] >ffff88800c75a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.904655] ^ [ 23.905038] ffff88800c75a600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 23.905535] ffff88800c75a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.906027] ================================================================== [ 23.906622] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.688900] BUG: Bad rss-counter state mm:000000005954b2bc type:MM_FILEPAGES val:33 [ 25.690184] BUG: Bad rss-counter state mm:000000005954b2bc type:MM_ANONPAGES val:22 [ 26.142483] BUG: Bad rss-counter state mm:000000001debce3a type:MM_FILEPAGES val:33 [ 26.143423] BUG: Bad rss-counter state mm:000000001debce3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37664' (ECDSA) to the list of known hosts. 2023/06/21 03:06:50 fuzzer started 2023/06/21 03:06:50 dialing manager at localhost:36067 2023/06/21 03:06:50 checking machine... 2023/06/21 03:06:50 checking revisions... [ 26.808773] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:06:50 testing simple program... [ 26.855943] cgroup: Unknown subsys name 'net' [ 26.901384] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:06:50 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=0000000000000001 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=000055cebfe93f08 CR3=0000000005482000 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=00007f01d33805100000556d42cc5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888017dd7c38 RCX=ffffffff81f7594b RDX=ffff888015a4d1c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888009b81008 RSP=ffff888017dd79c8 R8 =0000000000000004 R9 =0000000000000031 R10=0000000000000083 R11=0000000000000000 R12=0000000000000031 R13=ffff888009bb40e0 R14=1ffff11002fbaf3e R15=0000000000000083 RIP=ffffffff814c0860 RFL=00000293 [--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 00007f9723ff6900 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=00007fffb61c9000 CR3=000000000df26000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000