[ 23.733985] BUG: Bad rss-counter state mm:00000000ae2ff7ba type:MM_FILEPAGES val:33 [ 23.735491] BUG: Bad rss-counter state mm:00000000ae2ff7ba type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 23.890897] ================================================================== [ 23.891821] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.892753] Read of size 8 at addr ffff88800e20a4e0 by task sshd/220 [ 23.893580] [ 23.893873] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.894776] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.895762] Call Trace: [ 23.896100] [ 23.896384] dump_stack_lvl+0x91/0xf0 [ 23.896872] print_report+0xcc/0x620 [ 23.897356] ? __virt_addr_valid+0x102/0x340 [ 23.897906] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.898566] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.899187] kasan_report+0xbe/0xf0 [ 23.899674] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.900317] vma_interval_tree_remove+0xc75/0xec0 [ 23.900930] vma_prepare+0xc54/0x11a0 [ 23.901409] __split_vma+0x5af/0x950 [ 23.901886] ? __pfx___split_vma+0x10/0x10 [ 23.902446] ? find_held_lock+0x2c/0x110 [ 23.902972] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.903532] ? lock_is_held_type+0x9f/0x120 [ 23.904081] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.904686] ? mtree_range_walk+0x632/0x900 [ 23.905237] ? mas_walk+0x5c7/0x7c0 [ 23.905713] do_vmi_munmap+0x1f1/0x2b0 [ 23.906237] mmap_region+0x1f9/0x2660 [ 23.906721] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.907232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.907972] ? __pfx_lock_acquire+0x10/0x10 [ 23.908498] ? __pfx_mmap_region+0x10/0x10 [ 23.909030] ? security_mmap_addr+0x7d/0xa0 [ 23.909558] ? get_unmapped_area+0x1f5/0x3f0 [ 23.910100] do_mmap+0x854/0xf00 [ 23.910578] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.911073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.911635] ksys_mmap_pgoff+0x3af/0x500 [ 23.912153] do_syscall_64+0x3f/0x90 [ 23.912629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.913275] RIP: 0033:0x7f4b61096d82 [ 23.913729] 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 [ 23.915910] RSP: 002b:00007fff4f521a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.916810] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b61096d82 [ 23.917650] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b604d0000 [ 23.918523] RBP: 00007f4b604d0000 R08: 0000000000000009 R09: 0000000000001000 [ 23.919374] R10: 0000000000000812 R11: 0000000000000206 R12: 00005614ebaf4ec0 [ 23.920226] R13: 00007fff4f521a20 R14: 00007fff4f521a50 R15: 00007fff4f521db0 [ 23.921078] [ 23.921368] [ 23.921582] Allocated by task 213: [ 23.922009] kasan_save_stack+0x22/0x50 [ 23.922549] kasan_set_track+0x25/0x30 [ 23.923041] __kasan_slab_alloc+0x59/0x70 [ 23.923565] kmem_cache_alloc+0x16b/0x370 [ 23.924108] vm_area_dup+0x20/0x160 [ 23.924561] __split_vma+0x170/0x950 [ 23.925026] split_vma+0xc6/0x110 [ 23.925464] mprotect_fixup+0x8d2/0xb30 [ 23.925971] do_mprotect_pkey+0x87e/0xd40 [ 23.926528] __x64_sys_mprotect+0x78/0xc0 [ 23.927054] do_syscall_64+0x3f/0x90 [ 23.927529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.928180] [ 23.928395] Freed by task 13: [ 23.928782] kasan_save_stack+0x22/0x50 [ 23.929285] kasan_set_track+0x25/0x30 [ 23.929778] kasan_save_free_info+0x2b/0x50 [ 23.930349] __kasan_slab_free+0x10a/0x190 [ 23.930883] kmem_cache_free+0x10d/0x4d0 [ 23.931392] rcu_core+0x8c8/0x2860 [ 23.931865] __do_softirq+0x1b7/0x7d4 [ 23.932347] [ 23.932566] Last potentially related work creation: [ 23.933156] kasan_save_stack+0x22/0x50 [ 23.933663] __kasan_record_aux_stack+0x8e/0xa0 [ 23.934270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.934968] remove_vma+0x139/0x170 [ 23.935419] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.936004] do_vmi_munmap+0x1f1/0x2b0 [ 23.936518] __vm_munmap+0x138/0x3a0 [ 23.936985] __x64_sys_munmap+0x59/0x80 [ 23.937486] do_syscall_64+0x3f/0x90 [ 23.937958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.938640] [ 23.938856] Second to last potentially related work creation: [ 23.939550] kasan_save_stack+0x22/0x50 [ 23.940068] __kasan_record_aux_stack+0x8e/0xa0 [ 23.940642] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.941304] remove_vma+0x139/0x170 [ 23.941757] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.942349] do_vmi_munmap+0x1f1/0x2b0 [ 23.942835] mmap_region+0x1f9/0x2660 [ 23.943311] do_mmap+0x854/0xf00 [ 23.943773] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.944263] ksys_mmap_pgoff+0x3af/0x500 [ 23.944762] do_syscall_64+0x3f/0x90 [ 23.945232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.945869] [ 23.946084] The buggy address belongs to the object at ffff88800e20a488 [ 23.946084] which belongs to the cache vm_area_struct of size 168 [ 23.947569] The buggy address is located 88 bytes inside of [ 23.947569] freed 168-byte region [ffff88800e20a488, ffff88800e20a530) [ 23.948973] [ 23.949194] The buggy address belongs to the physical page: [ 23.949841] page:0000000022f82b9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe20a [ 23.950955] memcg:ffff88800eb0cb01 [ 23.951385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.952172] page_type: 0xffffffff() [ 23.952626] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7400 dead000000000003 [ 23.953542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb0cb01 [ 23.954481] page dumped because: kasan: bad access detected [ 23.955150] [ 23.955363] Memory state around the buggy address: [ 23.955966] ffff88800e20a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.956812] ffff88800e20a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 23.957667] >ffff88800e20a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.958544] ^ [ 23.959291] ffff88800e20a500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 23.960160] ffff88800e20a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.961008] ================================================================== [ 23.961931] Disabling lock debugging due to kernel taint [ 26.559160] BUG: Bad rss-counter state mm:00000000abea1020 type:MM_FILEPAGES val:33 [ 26.560249] BUG: Bad rss-counter state mm:00000000abea1020 type:MM_ANONPAGES val:22 [ 27.039787] BUG: Bad rss-counter state mm:000000003285f02a type:MM_FILEPAGES val:33 [ 27.040784] BUG: Bad rss-counter state mm:000000003285f02a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28996' (ECDSA) to the list of known hosts. 2023/06/20 12:00:22 fuzzer started 2023/06/20 12:00:22 dialing manager at localhost:36067 2023/06/20 12:00:22 checking machine... 2023/06/20 12:00:22 checking revisions... [ 27.696383] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:00:22 testing simple program... [ 27.745124] cgroup: Unknown subsys name 'net' [ 27.868452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:00:21 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=00007f9e4df45670 CR3=000000000f79a000 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=2031323a30303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a30303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800e90a630 RCX=ffffffff812bc70c RDX=1ffff11001d214c7 RSI=0000000000000008 RDI=ffff88800e90a6a0 RBP=ffff8880191c8001 RSP=ffff8880140c7e30 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88800e90a63f R11=0000000000000000 R12=1ffff11002818fc8 R13=ffff88800e90a638 R14=ffff8880191c8000 R15=ffff88800e90a500 RIP=ffffffff812bc79c 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9856802900 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=00007f98567e1020 CR3=000000001ca2c000 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