[ 32.251479] BUG: Bad rss-counter state mm:000000005b70d74b type:MM_FILEPAGES val:33 [ 32.252498] BUG: Bad rss-counter state mm:000000005b70d74b type:MM_ANONPAGES val:22 [ 32.291804] ================================================================== [ 32.292737] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.293675] Read of size 8 at addr ffff88800e1b5df0 by task sshd/219 [ 32.294527] [ 32.294753] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.295630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.296607] Call Trace: [ 32.296932] [ 32.297214] dump_stack_lvl+0x91/0xf0 [ 32.297703] print_report+0xcc/0x620 [ 32.298183] ? __virt_addr_valid+0x102/0x340 [ 32.298732] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.299401] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.300035] kasan_report+0xbe/0xf0 [ 32.300504] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.301113] vma_interval_tree_remove+0xc75/0xec0 [ 32.301720] vma_prepare+0xc54/0x11a0 [ 32.302199] __split_vma+0x5af/0x950 [ 32.302669] ? __pfx___split_vma+0x10/0x10 [ 32.303191] ? find_held_lock+0x2c/0x110 [ 32.303732] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.304313] ? lock_is_held_type+0x9f/0x120 [ 32.304849] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.305453] ? mtree_range_walk+0x632/0x900 [ 32.306021] ? mas_walk+0x5c7/0x7c0 [ 32.306499] do_vmi_munmap+0x1f1/0x2b0 [ 32.306963] mmap_region+0x1f9/0x2660 [ 32.307423] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.307916] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.308627] ? __pfx_lock_acquire+0x10/0x10 [ 32.309158] ? __pfx_mmap_region+0x10/0x10 [ 32.309688] ? security_mmap_addr+0x7d/0xa0 [ 32.310227] ? get_unmapped_area+0x1f5/0x3f0 [ 32.310791] do_mmap+0x854/0xf00 [ 32.311227] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.311770] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.312312] ksys_mmap_pgoff+0x3af/0x500 [ 32.312793] do_syscall_64+0x3f/0x90 [ 32.313241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.313849] RIP: 0033:0x7f17acaa7d82 [ 32.314283] 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 [ 32.316364] RSP: 002b:00007fffdf768788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.317315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17acaa7d82 [ 32.318195] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17abee1000 [ 32.319082] RBP: 00007f17abee1000 R08: 0000000000000009 R09: 0000000000001000 [ 32.319961] R10: 0000000000000812 R11: 0000000000000206 R12: 000056499728af70 [ 32.320845] R13: 00007fffdf7687a0 R14: 00007fffdf7687d0 R15: 00007fffdf768b30 [ 32.321732] [ 32.322038] [ 32.322267] Allocated by task 212: [ 32.322704] kasan_save_stack+0x22/0x50 [ 32.323227] kasan_set_track+0x25/0x30 [ 32.323761] __kasan_slab_alloc+0x59/0x70 [ 32.324306] kmem_cache_alloc+0x16b/0x370 [ 32.324843] vm_area_dup+0x20/0x160 [ 32.325304] __split_vma+0x170/0x950 [ 32.325791] split_vma+0xc6/0x110 [ 32.326252] mprotect_fixup+0x8d2/0xb30 [ 32.326779] do_mprotect_pkey+0x87e/0xd40 [ 32.327325] __x64_sys_mprotect+0x78/0xc0 [ 32.327871] do_syscall_64+0x3f/0x90 [ 32.328357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.329026] [ 32.329246] Freed by task 212: [ 32.329650] kasan_save_stack+0x22/0x50 [ 32.330181] kasan_set_track+0x25/0x30 [ 32.330693] kasan_save_free_info+0x2b/0x50 [ 32.331261] __kasan_slab_free+0x10a/0x190 [ 32.331840] kmem_cache_free+0x10d/0x4d0 [ 32.332369] rcu_core+0x8c8/0x2860 [ 32.332840] __do_softirq+0x1b7/0x7d4 [ 32.333337] [ 32.333560] Last potentially related work creation: [ 32.334184] kasan_save_stack+0x22/0x50 [ 32.334710] __kasan_record_aux_stack+0x8e/0xa0 [ 32.335302] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.336000] remove_vma+0x139/0x170 [ 32.336470] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.337050] do_vmi_munmap+0x1f1/0x2b0 [ 32.337563] __vm_munmap+0x138/0x3a0 [ 32.338047] __x64_sys_munmap+0x59/0x80 [ 32.338565] do_syscall_64+0x3f/0x90 [ 32.339073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.339748] [ 32.339969] Second to last potentially related work creation: [ 32.340693] kasan_save_stack+0x22/0x50 [ 32.341214] __kasan_record_aux_stack+0x8e/0xa0 [ 32.341818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.342481] remove_vma+0x139/0x170 [ 32.342949] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.343539] do_vmi_munmap+0x1f1/0x2b0 [ 32.344040] mmap_region+0x1f9/0x2660 [ 32.344537] do_mmap+0x854/0xf00 [ 32.344984] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.345492] ksys_mmap_pgoff+0x3af/0x500 [ 32.346021] do_syscall_64+0x3f/0x90 [ 32.346514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.347183] [ 32.347415] The buggy address belongs to the object at ffff88800e1b5d98 [ 32.347415] which belongs to the cache vm_area_struct of size 168 [ 32.348982] The buggy address is located 88 bytes inside of [ 32.348982] freed 168-byte region [ffff88800e1b5d98, ffff88800e1b5e40) [ 32.350446] [ 32.350671] The buggy address belongs to the physical page: [ 32.351359] page:0000000083b10e72 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b5 [ 32.352486] memcg:ffff88800e1a6901 [ 32.352928] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.353653] page_type: 0xffffffff() [ 32.354137] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.355091] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a6901 [ 32.356037] page dumped because: kasan: bad access detected [ 32.356722] [ 32.356944] Memory state around the buggy address: [ 32.357546] ffff88800e1b5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.358430] ffff88800e1b5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.359326] >ffff88800e1b5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.360212] ^ [ 32.361068] ffff88800e1b5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.361981] ffff88800e1b5e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.362869] ================================================================== [ 32.363958] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.048037] BUG: Bad rss-counter state mm:00000000f1cd8a06 type:MM_FILEPAGES val:33 [ 34.049079] BUG: Bad rss-counter state mm:00000000f1cd8a06 type:MM_ANONPAGES val:22 [ 34.437406] BUG: Bad rss-counter state mm:0000000035fe06cb type:MM_FILEPAGES val:33 [ 34.438065] BUG: Bad rss-counter state mm:0000000035fe06cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42375' (ECDSA) to the list of known hosts. 2023/06/19 18:34:51 fuzzer started 2023/06/19 18:34:51 dialing manager at localhost:44161 2023/06/19 18:34:51 checking machine... 2023/06/19 18:34:51 checking revisions... [ 35.076959] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:34:51 testing simple program... [ 35.126697] cgroup: Unknown subsys name 'net' [ 35.164756] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:34:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800ed1f158 RCX=0000000000000001 RDX=1ffff11001da3e2c RSI=ffff88800ed1f1f8 RDI=ffff88800ed1f160 RBP=ffff88800ed1f1f8 RSP=ffff88800ed1f060 R8 =ffffffff86088c1e R9 =ffff88800ed1f198 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff88800ed1f1a0 R14=ffff88800ed1f200 R15=ffff88800ed1f158 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 00007fedf994d900 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=00007fedf9912008 CR3=0000000010354000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fd58191f0a8 CR3=000000000db0c000 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=2030353a34333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34333a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000