syzkaller login: [ 38.724695] BUG: Bad rss-counter state mm:00000000f3144c74 type:MM_FILEPAGES val:33 [ 38.726105] BUG: Bad rss-counter state mm:00000000f3144c74 type:MM_ANONPAGES val:22 [ 38.880728] ================================================================== [ 38.881733] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.882734] Read of size 8 at addr ffff888016edd968 by task sshd/219 [ 38.883563] [ 38.883893] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.884816] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.885863] Call Trace: [ 38.886215] [ 38.886522] dump_stack_lvl+0x91/0xf0 [ 38.887043] print_report+0xcc/0x620 [ 38.887597] ? __virt_addr_valid+0x102/0x340 [ 38.888186] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.888847] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.889502] kasan_report+0xbe/0xf0 [ 38.890009] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.890679] vma_interval_tree_remove+0xc75/0xec0 [ 38.891319] vma_prepare+0xc54/0x11a0 [ 38.891842] __split_vma+0x5af/0x950 [ 38.892347] ? __pfx___split_vma+0x10/0x10 [ 38.892908] ? find_held_lock+0x2c/0x110 [ 38.893468] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.894068] ? lock_is_held_type+0x9f/0x120 [ 38.894646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.895301] ? mtree_range_walk+0x632/0x900 [ 38.895913] ? mas_walk+0x5c7/0x7c0 [ 38.896421] do_vmi_munmap+0x1f1/0x2b0 [ 38.896946] mmap_region+0x1f9/0x2660 [ 38.897457] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.897999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.898764] ? __pfx_lock_acquire+0x10/0x10 [ 38.899332] ? __pfx_mmap_region+0x10/0x10 [ 38.899955] ? security_mmap_addr+0x7d/0xa0 [ 38.900526] ? get_unmapped_area+0x1f5/0x3f0 [ 38.901117] do_mmap+0x854/0xf00 [ 38.901584] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902115] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.902715] ksys_mmap_pgoff+0x3af/0x500 [ 38.903258] do_syscall_64+0x3f/0x90 [ 38.903796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904500] RIP: 0033:0x7f92525c4d82 [ 38.905011] 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 [ 38.907368] RSP: 002b:00007ffe5f3a7218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908395] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92525c4d82 [ 38.909331] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92519fe000 [ 38.910271] RBP: 00007f92519fe000 R08: 0000000000000009 R09: 0000000000001000 [ 38.911214] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651046d5b20 [ 38.912158] R13: 00007ffe5f3a7230 R14: 00007ffe5f3a7260 R15: 00007ffe5f3a75c0 [ 38.913103] [ 38.913426] [ 38.913661] Allocated by task 212: [ 38.914134] kasan_save_stack+0x22/0x50 [ 38.914690] kasan_set_track+0x25/0x30 [ 38.915240] __kasan_slab_alloc+0x59/0x70 [ 38.915826] kmem_cache_alloc+0x16b/0x370 [ 38.916401] vm_area_dup+0x20/0x160 [ 38.916903] __split_vma+0x170/0x950 [ 38.917421] split_vma+0xc6/0x110 [ 38.917909] mprotect_fixup+0x8d2/0xb30 [ 38.918471] do_mprotect_pkey+0x87e/0xd40 [ 38.919049] __x64_sys_mprotect+0x78/0xc0 [ 38.919652] do_syscall_64+0x3f/0x90 [ 38.920179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920881] [ 38.921120] Freed by task 212: [ 38.921560] kasan_save_stack+0x22/0x50 [ 38.922119] kasan_set_track+0x25/0x30 [ 38.922674] kasan_save_free_info+0x2b/0x50 [ 38.923269] __kasan_slab_free+0x10a/0x190 [ 38.923874] kmem_cache_free+0x10d/0x4d0 [ 38.924436] rcu_core+0x8c8/0x2860 [ 38.924984] __do_softirq+0x1b7/0x7d4 [ 38.925517] [ 38.925757] Last potentially related work creation: [ 38.926409] kasan_save_stack+0x22/0x50 [ 38.926971] __kasan_record_aux_stack+0x8e/0xa0 [ 38.927622] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.928333] remove_vma+0x139/0x170 [ 38.928829] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.929447] do_vmi_munmap+0x1f1/0x2b0 [ 38.929988] __vm_munmap+0x138/0x3a0 [ 38.930510] __x64_sys_munmap+0x59/0x80 [ 38.931060] do_syscall_64+0x3f/0x90 [ 38.931606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932321] [ 38.932558] The buggy address belongs to the object at ffff888016edd910 [ 38.932558] which belongs to the cache vm_area_struct of size 168 [ 38.934174] The buggy address is located 88 bytes inside of [ 38.934174] freed 168-byte region [ffff888016edd910, ffff888016edd9b8) [ 38.935741] [ 38.935980] The buggy address belongs to the physical page: [ 38.936716] page:00000000597cae1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16edd [ 38.937928] memcg:ffff88800e056201 [ 38.938401] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.939114] page_type: 0xffffffff() [ 38.939616] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ae400 dead000000000002 [ 38.940643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e056201 [ 38.941648] page dumped because: kasan: bad access detected [ 38.942383] [ 38.942621] Memory state around the buggy address: [ 38.943267] ffff888016edd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.944233] ffff888016edd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.945192] >ffff888016edd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.946146] ^ [ 38.947018] ffff888016edd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.947980] ffff888016edda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.948927] ================================================================== [ 38.950081] Disabling lock debugging due to kernel taint [ 40.674535] BUG: Bad rss-counter state mm:0000000078a47fdc type:MM_FILEPAGES val:33 [ 40.675263] BUG: Bad rss-counter state mm:0000000078a47fdc type:MM_ANONPAGES val:22 [ 41.121188] BUG: Bad rss-counter state mm:00000000229df4a5 type:MM_FILEPAGES val:33 [ 41.121895] BUG: Bad rss-counter state mm:00000000229df4a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61976' (ECDSA) to the list of known hosts. 2023/06/21 05:28:26 fuzzer started 2023/06/21 05:28:26 dialing manager at localhost:36067 2023/06/21 05:28:27 checking machine... 2023/06/21 05:28:27 checking revisions... [ 41.829580] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:28:27 testing simple program... [ 41.863150] cgroup: Unknown subsys name 'net' [ 41.895881] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:28:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c1354 RSI=ffff8880192afc90 RDI=ffff88806ce09aa0 RBP=ffff8880192afc90 RSP=ffff88806ce099f0 R8 =ffffffff86138eb4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d9c R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff8880192afc98 R15=ffff88806ce09a98 RIP=ffffffff81130445 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 00007f3ec97c7900 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=00007ffffd06b000 CR3=000000000e08a000 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=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 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=00007f20828aaea0 CR3=000000000d9e4000 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=88c5d1afd19b9db9a74486ff0793661c XMM02=ec2efd57dc4c00df000000000011ace0 XMM03=e482629915578e1c000000000011adb0 XMM04=472e17f3149970df00000000000ae988 XMM05=19e9129bd510f2350000000000131330 XMM06=4fda316b135da52b00000000001311b8 XMM07=e042d86d42eb936e0000000000121990 XMM08=e482629915578e1c000000000011adb0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000