[ 31.046803] BUG: Bad rss-counter state mm:00000000034b5f63 type:MM_FILEPAGES val:33 [ 31.048094] BUG: Bad rss-counter state mm:00000000034b5f63 type:MM_ANONPAGES val:22 [ 31.091919] ================================================================== [ 31.092824] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.093935] Read of size 8 at addr ffff88800df4fed8 by task sshd/220 [ 31.094753] [ 31.094972] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.095992] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.096966] Call Trace: [ 31.097284] [ 31.097587] dump_stack_lvl+0x91/0xf0 [ 31.098082] print_report+0xcc/0x620 [ 31.098615] ? __virt_addr_valid+0x102/0x340 [ 31.099187] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.099831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.100440] kasan_report+0xbe/0xf0 [ 31.100928] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.101551] vma_interval_tree_remove+0xc75/0xec0 [ 31.102147] vma_prepare+0xc54/0x11a0 [ 31.102634] __split_vma+0x5af/0x950 [ 31.103101] ? __pfx___split_vma+0x10/0x10 [ 31.103634] ? find_held_lock+0x2c/0x110 [ 31.104190] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.104754] ? lock_is_held_type+0x9f/0x120 [ 31.105288] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.105881] ? mtree_range_walk+0x632/0x900 [ 31.106427] ? mas_walk+0x5c7/0x7c0 [ 31.106896] do_vmi_munmap+0x1f1/0x2b0 [ 31.107393] mmap_region+0x1f9/0x2660 [ 31.107886] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.108395] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.109106] ? __pfx_lock_acquire+0x10/0x10 [ 31.109643] ? __pfx_mmap_region+0x10/0x10 [ 31.110170] ? security_mmap_addr+0x7d/0xa0 [ 31.110707] ? get_unmapped_area+0x1f5/0x3f0 [ 31.111249] do_mmap+0x854/0xf00 [ 31.111691] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.112221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.112784] ksys_mmap_pgoff+0x3af/0x500 [ 31.113297] do_syscall_64+0x3f/0x90 [ 31.113781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.114418] RIP: 0033:0x7f63df521d82 [ 31.114878] 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 [ 31.116999] RSP: 002b:00007ffeaabbb408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.117916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f63df521d82 [ 31.118745] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f63de95b000 [ 31.119596] RBP: 00007f63de95b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.120464] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b0a338db20 [ 31.121300] R13: 00007ffeaabbb420 R14: 00007ffeaabbb450 R15: 00007ffeaabbb7b0 [ 31.122156] [ 31.122448] [ 31.122669] Allocated by task 208: [ 31.123094] kasan_save_stack+0x22/0x50 [ 31.123594] kasan_set_track+0x25/0x30 [ 31.124108] __kasan_slab_alloc+0x59/0x70 [ 31.124625] kmem_cache_alloc+0x16b/0x370 [ 31.125143] vm_area_dup+0x20/0x160 [ 31.125591] __split_vma+0x170/0x950 [ 31.126050] split_vma+0xc6/0x110 [ 31.126493] mprotect_fixup+0x8d2/0xb30 [ 31.126989] do_mprotect_pkey+0x87e/0xd40 [ 31.127519] __x64_sys_mprotect+0x78/0xc0 [ 31.128054] do_syscall_64+0x3f/0x90 [ 31.128533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129166] [ 31.129390] Freed by task 204: [ 31.129778] kasan_save_stack+0x22/0x50 [ 31.130272] kasan_set_track+0x25/0x30 [ 31.130766] kasan_save_free_info+0x2b/0x50 [ 31.131302] __kasan_slab_free+0x10a/0x190 [ 31.131852] kmem_cache_free+0x10d/0x4d0 [ 31.132360] rcu_core+0x8c8/0x2860 [ 31.132806] __do_softirq+0x1b7/0x7d4 [ 31.133300] [ 31.133513] Last potentially related work creation: [ 31.134096] kasan_save_stack+0x22/0x50 [ 31.134607] __kasan_record_aux_stack+0x8e/0xa0 [ 31.135174] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.135828] remove_vma+0x139/0x170 [ 31.136289] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.136931] do_vmi_munmap+0x1f1/0x2b0 [ 31.137417] __vm_munmap+0x138/0x3a0 [ 31.137882] __x64_sys_munmap+0x59/0x80 [ 31.138378] do_syscall_64+0x3f/0x90 [ 31.138848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.139494] [ 31.139710] Second to last potentially related work creation: [ 31.140459] kasan_save_stack+0x22/0x50 [ 31.140955] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141532] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.142175] remove_vma+0x139/0x170 [ 31.142639] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.143196] do_vmi_munmap+0x1f1/0x2b0 [ 31.143693] mmap_region+0x1f9/0x2660 [ 31.144189] do_mmap+0x854/0xf00 [ 31.144630] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.145128] ksys_mmap_pgoff+0x3af/0x500 [ 31.145631] do_syscall_64+0x3f/0x90 [ 31.146100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146748] [ 31.146962] The buggy address belongs to the object at ffff88800df4fe80 [ 31.146962] which belongs to the cache vm_area_struct of size 168 [ 31.148441] The buggy address is located 88 bytes inside of [ 31.148441] freed 168-byte region [ffff88800df4fe80, ffff88800df4ff28) [ 31.149853] [ 31.150067] The buggy address belongs to the physical page: [ 31.150747] page:000000007cc91c83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf4f [ 31.151840] memcg:ffff888013f95701 [ 31.152275] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.152966] page_type: 0xffffffff() [ 31.153421] raw: 0100000000000200 ffff88800879fc80 ffffea0000357340 dead000000000007 [ 31.154346] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f95701 [ 31.155254] page dumped because: kasan: bad access detected [ 31.155921] [ 31.156142] Memory state around the buggy address: [ 31.156718] ffff88800df4fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.157583] ffff88800df4fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.158445] >ffff88800df4fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.159301] ^ [ 31.160042] ffff88800df4ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.160890] ffff88800df4ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.161738] ================================================================== [ 31.162669] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.122509] BUG: Bad rss-counter state mm:00000000168daadc type:MM_FILEPAGES val:33 [ 33.123532] BUG: Bad rss-counter state mm:00000000168daadc type:MM_ANONPAGES val:22 [ 33.666098] BUG: Bad rss-counter state mm:00000000b608a1be type:MM_FILEPAGES val:33 [ 33.667363] BUG: Bad rss-counter state mm:00000000b608a1be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6843' (ECDSA) to the list of known hosts. 2023/06/19 18:14:50 fuzzer started 2023/06/19 18:14:50 dialing manager at localhost:44161 2023/06/19 18:14:50 checking machine... 2023/06/19 18:14:50 checking revisions... [ 34.359521] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:14:51 testing simple program... [ 34.407971] cgroup: Unknown subsys name 'net' [ 34.459857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:14:50 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=000055fee1878000 CR3=000000000f5fc000 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=2030353a34313a3831203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a34313a3831203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff7fffffffffff RBX=ffff888009a5f6a8 RCX=ffffffff83ab403d RDX=0000000000000000 RSI=0000000000000004 RDI=ffffffff87f94e40 RBP=ffffffff87f94e40 RSP=ffff888016b0f4e8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff87f94e43 R11=00000b5000000b50 R12=0000000000000000 R13=00000000000000d5 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180eef9 RFL=00000216 [----AP-] 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 00007f4e774d9900 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=00007f4e77a90618 CR3=000000000f0e8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000