[ 31.117803] BUG: Bad rss-counter state mm:00000000372fe720 type:MM_FILEPAGES val:33 [ 31.119040] BUG: Bad rss-counter state mm:00000000372fe720 type:MM_ANONPAGES val:22 [ 31.294600] ================================================================== [ 31.295746] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.297059] Read of size 8 at addr ffff88801a39bb38 by task sshd/226 [ 31.297886] [ 31.298120] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.299057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.300171] Call Trace: [ 31.300550] [ 31.300858] dump_stack_lvl+0x91/0xf0 [ 31.301388] print_report+0xcc/0x620 [ 31.301936] ? __virt_addr_valid+0x102/0x340 [ 31.302567] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303953] kasan_report+0xbe/0xf0 [ 31.304506] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.305195] vma_interval_tree_remove+0xc75/0xec0 [ 31.305871] vma_prepare+0xc54/0x11a0 [ 31.306422] __split_vma+0x5af/0x950 [ 31.306955] ? __pfx___split_vma+0x10/0x10 [ 31.307553] ? find_held_lock+0x2c/0x110 [ 31.308131] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.308788] ? lock_is_held_type+0x9f/0x120 [ 31.309386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.310072] ? mtree_range_walk+0x632/0x900 [ 31.310703] ? mas_walk+0x5c7/0x7c0 [ 31.311224] do_vmi_munmap+0x1f1/0x2b0 [ 31.311773] mmap_region+0x1f9/0x2660 [ 31.312298] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.312884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.313685] ? __pfx_lock_acquire+0x10/0x10 [ 31.314283] ? __pfx_mmap_region+0x10/0x10 [ 31.314881] ? security_mmap_addr+0x7d/0xa0 [ 31.315477] ? get_unmapped_area+0x1f5/0x3f0 [ 31.316079] do_mmap+0x854/0xf00 [ 31.316584] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.317129] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.317765] ksys_mmap_pgoff+0x3af/0x500 [ 31.318343] do_syscall_64+0x3f/0x90 [ 31.318882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.319597] RIP: 0033:0x7fcf66464d82 [ 31.320088] 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 [ 31.322420] RSP: 002b:00007ffe84bb4828 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.323405] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf66464d82 [ 31.324319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf6589e000 [ 31.325255] RBP: 00007fcf6589e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.326173] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564229f4dec0 [ 31.327119] R13: 00007ffe84bb4840 R14: 00007ffe84bb4870 R15: 00007ffe84bb4bd0 [ 31.328040] [ 31.328353] [ 31.328595] Allocated by task 208: [ 31.329057] kasan_save_stack+0x22/0x50 [ 31.329618] kasan_set_track+0x25/0x30 [ 31.330145] __kasan_slab_alloc+0x59/0x70 [ 31.330737] kmem_cache_alloc+0x16b/0x370 [ 31.331286] vm_area_dup+0x20/0x160 [ 31.331786] __split_vma+0x170/0x950 [ 31.332282] split_vma+0xc6/0x110 [ 31.332761] mprotect_fixup+0x8d2/0xb30 [ 31.333295] do_mprotect_pkey+0x87e/0xd40 [ 31.333876] __x64_sys_mprotect+0x78/0xc0 [ 31.334465] do_syscall_64+0x3f/0x90 [ 31.334969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335654] [ 31.335883] Freed by task 208: [ 31.336297] kasan_save_stack+0x22/0x50 [ 31.336839] kasan_set_track+0x25/0x30 [ 31.337360] kasan_save_free_info+0x2b/0x50 [ 31.337953] __kasan_slab_free+0x10a/0x190 [ 31.338606] kmem_cache_free+0x10d/0x4d0 [ 31.339146] rcu_core+0x8c8/0x2860 [ 31.339629] __do_softirq+0x1b7/0x7d4 [ 31.340135] [ 31.340363] Last potentially related work creation: [ 31.340997] kasan_save_stack+0x22/0x50 [ 31.341553] __kasan_record_aux_stack+0x8e/0xa0 [ 31.342160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.342878] remove_vma+0x139/0x170 [ 31.343360] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.343959] do_vmi_munmap+0x1f1/0x2b0 [ 31.344488] __vm_munmap+0x138/0x3a0 [ 31.344989] __x64_sys_munmap+0x59/0x80 [ 31.345544] do_syscall_64+0x3f/0x90 [ 31.346047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346750] [ 31.346979] The buggy address belongs to the object at ffff88801a39bae0 [ 31.346979] which belongs to the cache vm_area_struct of size 168 [ 31.348523] The buggy address is located 88 bytes inside of [ 31.348523] freed 168-byte region [ffff88801a39bae0, ffff88801a39bb88) [ 31.350004] [ 31.350256] The buggy address belongs to the physical page: [ 31.350963] page:00000000733f4dad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a39b [ 31.352124] memcg:ffff88801a39c001 [ 31.352580] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.353257] page_type: 0xffffffff() [ 31.353741] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.354746] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a39c001 [ 31.355711] page dumped because: kasan: bad access detected [ 31.356400] [ 31.356642] Memory state around the buggy address: [ 31.357255] ffff88801a39ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.358157] ffff88801a39ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.359083] >ffff88801a39bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.359982] ^ [ 31.360627] ffff88801a39bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.361523] ffff88801a39bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.362428] ================================================================== [ 31.363472] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.262807] BUG: Bad rss-counter state mm:000000008b322217 type:MM_FILEPAGES val:33 [ 33.264315] BUG: Bad rss-counter state mm:000000008b322217 type:MM_ANONPAGES val:22 [ 33.746104] BUG: Bad rss-counter state mm:000000009cf842b8 type:MM_FILEPAGES val:33 [ 33.747147] BUG: Bad rss-counter state mm:000000009cf842b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39122' (ECDSA) to the list of known hosts. 2023/06/19 12:43:34 fuzzer started 2023/06/19 12:43:35 dialing manager at localhost:44161 2023/06/19 12:43:35 checking machine... 2023/06/19 12:43:35 checking revisions... [ 34.479575] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:43:35 testing simple program... [ 34.538640] cgroup: Unknown subsys name 'net' [ 34.576497] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:34 Registers: info registers vcpu 0 RAX=ffff88800c778001 RBX=ffff88806ce09a70 RCX=0000000000000001 RDX=ffff88800c777d01 RSI=ffff88800c777d48 RDI=ffff88806ce09a80 RBP=ffff88800c777d48 RSP=ffff88806ce099c8 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020c48 R12=0000000000000008 R13=ffff88800c770000 R14=ffff88800c777d48 R15=ffff88806ce09a70 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007f40de5d8900 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=00007f40deb8f618 CR3=000000001bdbe000 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=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 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=00007ffe86049538 CR3=000000000dd70000 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=2034333a33343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33343a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000