[ 24.154608] BUG: Bad rss-counter state mm:000000004d270a76 type:MM_FILEPAGES val:33 [ 24.155825] BUG: Bad rss-counter state mm:000000004d270a76 type:MM_ANONPAGES val:22 [ 24.296312] ================================================================== [ 24.297360] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.298483] Read of size 8 at addr ffff88800f058c20 by task sshd/219 [ 24.299342] [ 24.299555] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.300395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.301350] Call Trace: [ 24.301676] [ 24.301957] dump_stack_lvl+0x91/0xf0 [ 24.302435] print_report+0xcc/0x620 [ 24.302915] ? __virt_addr_valid+0x102/0x340 [ 24.303463] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.304068] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.304674] kasan_report+0xbe/0xf0 [ 24.305139] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.305763] vma_interval_tree_remove+0xc75/0xec0 [ 24.306364] vma_prepare+0xc54/0x11a0 [ 24.306840] __split_vma+0x5af/0x950 [ 24.307313] ? __pfx___split_vma+0x10/0x10 [ 24.307836] ? find_held_lock+0x2c/0x110 [ 24.308354] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.308916] ? lock_is_held_type+0x9f/0x120 [ 24.309454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.310071] ? mtree_range_walk+0x632/0x900 [ 24.310622] ? mas_walk+0x5c7/0x7c0 [ 24.311094] do_vmi_munmap+0x1f1/0x2b0 [ 24.311583] mmap_region+0x1f9/0x2660 [ 24.312060] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.312564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.313271] ? __pfx_lock_acquire+0x10/0x10 [ 24.313803] ? __pfx_mmap_region+0x10/0x10 [ 24.314329] ? security_mmap_addr+0x7d/0xa0 [ 24.314858] ? get_unmapped_area+0x1f5/0x3f0 [ 24.315403] do_mmap+0x854/0xf00 [ 24.315848] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.316341] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.316901] ksys_mmap_pgoff+0x3af/0x500 [ 24.317407] do_syscall_64+0x3f/0x90 [ 24.317892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.318530] RIP: 0033:0x7f2b3f372d82 [ 24.318981] 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 [ 24.321061] RSP: 002b:00007ffc7b9d3338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.321969] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b3f372d82 [ 24.322810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b3e7ac000 [ 24.323652] RBP: 00007f2b3e7ac000 R08: 0000000000000009 R09: 0000000000001000 [ 24.324489] R10: 0000000000000812 R11: 0000000000000206 R12: 000055744200ed90 [ 24.325332] R13: 00007ffc7b9d3350 R14: 00007ffc7b9d3380 R15: 00007ffc7b9d36e0 [ 24.326185] [ 24.326478] [ 24.326691] Allocated by task 212: [ 24.327113] kasan_save_stack+0x22/0x50 [ 24.327613] kasan_set_track+0x25/0x30 [ 24.328106] __kasan_slab_alloc+0x59/0x70 [ 24.328622] kmem_cache_alloc+0x16b/0x370 [ 24.329132] vm_area_dup+0x20/0x160 [ 24.329581] __split_vma+0x170/0x950 [ 24.330066] split_vma+0xc6/0x110 [ 24.330501] mprotect_fixup+0x8d2/0xb30 [ 24.330999] do_mprotect_pkey+0x87e/0xd40 [ 24.331520] __x64_sys_mprotect+0x78/0xc0 [ 24.332039] do_syscall_64+0x3f/0x90 [ 24.332513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.333150] [ 24.333364] Freed by task 13: [ 24.333749] kasan_save_stack+0x22/0x50 [ 24.334252] kasan_set_track+0x25/0x30 [ 24.334741] kasan_save_free_info+0x2b/0x50 [ 24.335269] __kasan_slab_free+0x10a/0x190 [ 24.335798] kmem_cache_free+0x10d/0x4d0 [ 24.336304] rcu_core+0x8c8/0x2860 [ 24.336744] __do_softirq+0x1b7/0x7d4 [ 24.337218] [ 24.337430] Last potentially related work creation: [ 24.338022] kasan_save_stack+0x22/0x50 [ 24.338520] __kasan_record_aux_stack+0x8e/0xa0 [ 24.339087] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.339726] remove_vma+0x139/0x170 [ 24.340174] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.340733] do_vmi_munmap+0x1f1/0x2b0 [ 24.341215] __vm_munmap+0x138/0x3a0 [ 24.341691] __x64_sys_munmap+0x59/0x80 [ 24.342181] do_syscall_64+0x3f/0x90 [ 24.342651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.343289] [ 24.343503] The buggy address belongs to the object at ffff88800f058bc8 [ 24.343503] which belongs to the cache vm_area_struct of size 168 [ 24.344952] The buggy address is located 88 bytes inside of [ 24.344952] freed 168-byte region [ffff88800f058bc8, ffff88800f058c70) [ 24.346336] [ 24.346553] The buggy address belongs to the physical page: [ 24.347202] page:0000000020afb125 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf058 [ 24.348267] memcg:ffff88800df61001 [ 24.348691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.349381] page_type: 0xffffffff() [ 24.349833] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.350742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df61001 [ 24.351637] page dumped because: kasan: bad access detected [ 24.352291] [ 24.352508] Memory state around the buggy address: [ 24.353079] ffff88800f058b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.353937] ffff88800f058b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.354782] >ffff88800f058c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.355627] ^ [ 24.356150] ffff88800f058c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.357129] ffff88800f058d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.357984] ================================================================== [ 24.358986] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.217460] BUG: Bad rss-counter state mm:0000000030469056 type:MM_FILEPAGES val:33 [ 26.218574] BUG: Bad rss-counter state mm:0000000030469056 type:MM_ANONPAGES val:22 [ 26.686679] BUG: Bad rss-counter state mm:00000000bf146b89 type:MM_FILEPAGES val:33 [ 26.687686] BUG: Bad rss-counter state mm:00000000bf146b89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43048' (ECDSA) to the list of known hosts. 2023/06/20 17:42:41 fuzzer started 2023/06/20 17:42:41 dialing manager at localhost:36067 2023/06/20 17:42:41 checking machine... 2023/06/20 17:42:41 checking revisions... [ 27.467943] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:42:42 testing simple program... [ 27.513810] cgroup: Unknown subsys name 'net' [ 27.556591] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:41 Registers: info registers vcpu 0 RAX=1ffff110028cffa5 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffff815a72af RDI=ffffc9000068d3a1 RBP=ffff88801467fd28 RSP=ffff88801467fc60 R8 =0000000000000006 R9 =0000000000000101 R10=000000000000005f R11=0000000000000000 R12=ffff88801467fd28 R13=ffff88801467fd60 R14=0000000000000015 R15=ffffc9000068d3a0 RIP=ffffffff815a72e8 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 00007f2b8aceb900 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=00007fba0d0d4650 CR3=000000000c77a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=3d4610aa65f5375a00000000000ae988 XMM05=276006cb985fda5a0000000000132318 XMM06=c2941bde25834d940000000000130a78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffde41bc728 CR3=000000001015a000 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=2031343a32343a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32343a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000