[ 34.807448] BUG: Bad rss-counter state mm:000000008fba3157 type:MM_FILEPAGES val:33 [ 34.808395] BUG: Bad rss-counter state mm:000000008fba3157 type:MM_ANONPAGES val:22 [ 34.846057] ================================================================== [ 34.847095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.848164] Read of size 8 at addr ffff88800e7bd6b0 by task sshd/219 [ 34.849116] [ 34.849333] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.850358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.851352] Call Trace: [ 34.851672] [ 34.851963] dump_stack_lvl+0x91/0xf0 [ 34.852472] print_report+0xcc/0x620 [ 34.852961] ? __virt_addr_valid+0x102/0x340 [ 34.853517] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.854152] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.854778] kasan_report+0xbe/0xf0 [ 34.855261] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.855891] vma_interval_tree_remove+0xc75/0xec0 [ 34.856509] vma_prepare+0xc54/0x11a0 [ 34.856995] __split_vma+0x5af/0x950 [ 34.857474] ? __pfx___split_vma+0x10/0x10 [ 34.858029] ? find_held_lock+0x2c/0x110 [ 34.858548] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.859113] ? lock_is_held_type+0x9f/0x120 [ 34.859671] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.860284] ? mtree_range_walk+0x632/0x900 [ 34.860837] ? mas_walk+0x5c7/0x7c0 [ 34.861310] do_vmi_munmap+0x1f1/0x2b0 [ 34.861816] mmap_region+0x1f9/0x2660 [ 34.862305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.862825] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.863556] ? __pfx_lock_acquire+0x10/0x10 [ 34.864091] ? __pfx_mmap_region+0x10/0x10 [ 34.864629] ? security_mmap_addr+0x7d/0xa0 [ 34.865161] ? get_unmapped_area+0x1f5/0x3f0 [ 34.865715] do_mmap+0x854/0xf00 [ 34.866181] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.866677] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.867248] ksys_mmap_pgoff+0x3af/0x500 [ 34.867762] do_syscall_64+0x3f/0x90 [ 34.868248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.868891] RIP: 0033:0x7fa758ae7d82 [ 34.869356] 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 [ 34.871530] RSP: 002b:00007fffe88c8278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.872452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa758ae7d82 [ 34.873315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa757f21000 [ 34.874188] RBP: 00007fa757f21000 R08: 0000000000000009 R09: 0000000000001000 [ 34.875036] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644258b3ec0 [ 34.875896] R13: 00007fffe88c8290 R14: 00007fffe88c82c0 R15: 00007fffe88c8620 [ 34.876766] [ 34.877064] [ 34.877288] Allocated by task 212: [ 34.877730] kasan_save_stack+0x22/0x50 [ 34.878249] kasan_set_track+0x25/0x30 [ 34.878748] __kasan_slab_alloc+0x59/0x70 [ 34.879286] kmem_cache_alloc+0x16b/0x370 [ 34.879807] vm_area_dup+0x20/0x160 [ 34.880264] __split_vma+0x170/0x950 [ 34.880735] split_vma+0xc6/0x110 [ 34.881184] mprotect_fixup+0x8d2/0xb30 [ 34.881693] do_mprotect_pkey+0x87e/0xd40 [ 34.882244] __x64_sys_mprotect+0x78/0xc0 [ 34.882777] do_syscall_64+0x3f/0x90 [ 34.883254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.883898] [ 34.884119] Freed by task 203: [ 34.884527] kasan_save_stack+0x22/0x50 [ 34.885038] kasan_set_track+0x25/0x30 [ 34.885543] kasan_save_free_info+0x2b/0x50 [ 34.886103] __kasan_slab_free+0x10a/0x190 [ 34.886632] kmem_cache_free+0x10d/0x4d0 [ 34.887155] rcu_core+0x8c8/0x2860 [ 34.887608] __do_softirq+0x1b7/0x7d4 [ 34.888093] [ 34.888308] Last potentially related work creation: [ 34.888900] kasan_save_stack+0x22/0x50 [ 34.889439] __kasan_record_aux_stack+0x8e/0xa0 [ 34.890042] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.890691] remove_vma+0x139/0x170 [ 34.891158] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.891722] do_vmi_munmap+0x1f1/0x2b0 [ 34.892223] __vm_munmap+0x138/0x3a0 [ 34.892699] __x64_sys_munmap+0x59/0x80 [ 34.893214] do_syscall_64+0x3f/0x90 [ 34.893705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.894371] [ 34.894592] Second to last potentially related work creation: [ 34.895298] kasan_save_stack+0x22/0x50 [ 34.895815] __kasan_record_aux_stack+0x8e/0xa0 [ 34.896398] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.897048] remove_vma+0x139/0x170 [ 34.897502] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.898081] do_vmi_munmap+0x1f1/0x2b0 [ 34.898572] mmap_region+0x1f9/0x2660 [ 34.899055] do_mmap+0x854/0xf00 [ 34.899495] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.900000] ksys_mmap_pgoff+0x3af/0x500 [ 34.900506] do_syscall_64+0x3f/0x90 [ 34.900982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.901646] [ 34.901873] The buggy address belongs to the object at ffff88800e7bd658 [ 34.901873] which belongs to the cache vm_area_struct of size 168 [ 34.903374] The buggy address is located 88 bytes inside of [ 34.903374] freed 168-byte region [ffff88800e7bd658, ffff88800e7bd700) [ 34.904810] [ 34.905028] The buggy address belongs to the physical page: [ 34.905703] page:00000000b91fa7f6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7bd [ 34.906830] memcg:ffff88800e7ab501 [ 34.907261] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.907971] page_type: 0xffffffff() [ 34.908430] raw: 0100000000000200 ffff88800879fc80 ffffea000038d480 dead000000000007 [ 34.909358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7ab501 [ 34.910280] page dumped because: kasan: bad access detected [ 34.910981] [ 34.911202] Memory state around the buggy address: [ 34.911788] ffff88800e7bd580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.912665] ffff88800e7bd600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.913549] >ffff88800e7bd680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.914445] ^ [ 34.915043] ffff88800e7bd700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 34.915917] ffff88800e7bd780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.916845] ================================================================== [ 34.917783] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.749381] BUG: Bad rss-counter state mm:0000000054229814 type:MM_FILEPAGES val:33 [ 36.750682] BUG: Bad rss-counter state mm:0000000054229814 type:MM_ANONPAGES val:22 [ 37.258325] BUG: Bad rss-counter state mm:00000000412bfa9a type:MM_FILEPAGES val:33 [ 37.259486] BUG: Bad rss-counter state mm:00000000412bfa9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5516' (ECDSA) to the list of known hosts. 2023/06/19 18:58:39 fuzzer started 2023/06/19 18:58:39 dialing manager at localhost:44161 2023/06/19 18:58:40 checking machine... 2023/06/19 18:58:40 checking revisions... [ 37.919807] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:58:40 testing simple program... [ 37.973016] cgroup: Unknown subsys name 'net' [ 38.027698] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:58:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff81847452 RCX=ffffffff8613da01 RDX=1ffff11002bf2f53 RSI=0000000000000000 RDI=ffffffff81847452 RBP=ffffffff81847452 RSP=ffff888015f979e8 R8 =ffffffff8613daa0 R9 =ffff888015f97a80 R10=0000000000038001 R11=0000000000021e78 R12=ffff888015f97b08 R13=0000000000000000 R14=ffff8880145cb680 R15=ffff888009601130 RIP=ffffffff811fc6f7 RFL=00000286 [--S--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 00007f635f1bd900 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=00007f635f774618 CR3=0000000019c70000 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=ffff888008c58400 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=00007fd983dd1140 CR3=000000000d7d0000 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=ef47f3d8aa4534b2ff49368dd884dbcf XMM02=2c67c8bc2e329bc3000000000011ce80 XMM03=fb795ef6d657705600000000001240a8 XMM04=4b8ac1e66ec2a5f600000000000ae988 XMM05=dfcdbad4f1609c370000000000134d30 XMM06=806171799158d9670000000000134bb8 XMM07=e042d86d42eb936e0000000000124380 XMM08=9beffa5e8c84f1c4000000000011cee0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000