[ 45.131348] BUG: Bad rss-counter state mm:000000006312114a type:MM_FILEPAGES val:33 [ 45.133116] BUG: Bad rss-counter state mm:000000006312114a type:MM_ANONPAGES val:22 [ 45.298880] ================================================================== [ 45.299928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.300918] Read of size 8 at addr ffff88800e37c880 by task sshd/219 [ 45.301816] [ 45.302045] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.302965] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.304086] Call Trace: [ 45.304447] [ 45.304770] dump_stack_lvl+0x91/0xf0 [ 45.305313] print_report+0xcc/0x620 [ 45.305833] ? __virt_addr_valid+0x102/0x340 [ 45.306420] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.307079] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.307763] kasan_report+0xbe/0xf0 [ 45.308273] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.308934] vma_interval_tree_remove+0xc75/0xec0 [ 45.309575] vma_prepare+0xc54/0x11a0 [ 45.310083] __split_vma+0x5af/0x950 [ 45.310587] ? __pfx___split_vma+0x10/0x10 [ 45.311152] ? find_held_lock+0x2c/0x110 [ 45.311710] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.312317] ? lock_is_held_type+0x9f/0x120 [ 45.312886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.313533] ? mtree_range_walk+0x632/0x900 [ 45.314114] ? mas_walk+0x5c7/0x7c0 [ 45.314619] do_vmi_munmap+0x1f1/0x2b0 [ 45.315142] mmap_region+0x1f9/0x2660 [ 45.315687] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.316232] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.316998] ? __pfx_lock_acquire+0x10/0x10 [ 45.317619] ? __pfx_mmap_region+0x10/0x10 [ 45.318229] ? security_mmap_addr+0x7d/0xa0 [ 45.318837] ? get_unmapped_area+0x1f5/0x3f0 [ 45.319471] do_mmap+0x854/0xf00 [ 45.319971] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.320540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.321190] ksys_mmap_pgoff+0x3af/0x500 [ 45.321771] do_syscall_64+0x3f/0x90 [ 45.322315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.323072] RIP: 0033:0x7f8c3e7fed82 [ 45.323618] 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 [ 45.326077] RSP: 002b:00007ffc7874b5d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.327113] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c3e7fed82 [ 45.328106] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c3dc38000 [ 45.329078] RBP: 00007f8c3dc38000 R08: 0000000000000009 R09: 0000000000001000 [ 45.330045] R10: 0000000000000812 R11: 0000000000000206 R12: 000055600c094ec0 [ 45.331012] R13: 00007ffc7874b5f0 R14: 00007ffc7874b620 R15: 00007ffc7874b980 [ 45.332003] [ 45.332337] [ 45.332578] Allocated by task 212: [ 45.333085] kasan_save_stack+0x22/0x50 [ 45.333663] kasan_set_track+0x25/0x30 [ 45.334229] __kasan_slab_alloc+0x59/0x70 [ 45.334831] kmem_cache_alloc+0x16b/0x370 [ 45.335439] vm_area_dup+0x20/0x160 [ 45.335967] __split_vma+0x170/0x950 [ 45.336502] split_vma+0xc6/0x110 [ 45.337006] mprotect_fixup+0x8d2/0xb30 [ 45.337579] do_mprotect_pkey+0x87e/0xd40 [ 45.338177] __x64_sys_mprotect+0x78/0xc0 [ 45.338778] do_syscall_64+0x3f/0x90 [ 45.339324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.340065] [ 45.340309] Freed by task 212: [ 45.340760] kasan_save_stack+0x22/0x50 [ 45.341341] kasan_set_track+0x25/0x30 [ 45.341904] kasan_save_free_info+0x2b/0x50 [ 45.342519] __kasan_slab_free+0x10a/0x190 [ 45.343125] kmem_cache_free+0x10d/0x4d0 [ 45.343713] rcu_core+0x8c8/0x2860 [ 45.344220] __do_softirq+0x1b7/0x7d4 [ 45.344765] [ 45.345007] Last potentially related work creation: [ 45.345679] kasan_save_stack+0x22/0x50 [ 45.346252] __kasan_record_aux_stack+0x8e/0xa0 [ 45.346883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.347605] remove_vma+0x139/0x170 [ 45.348102] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.348728] do_vmi_munmap+0x1f1/0x2b0 [ 45.349254] __vm_munmap+0x138/0x3a0 [ 45.349771] __x64_sys_munmap+0x59/0x80 [ 45.350334] do_syscall_64+0x3f/0x90 [ 45.350884] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.351614] [ 45.351850] The buggy address belongs to the object at ffff88800e37c828 [ 45.351850] which belongs to the cache vm_area_struct of size 168 [ 45.353464] The buggy address is located 88 bytes inside of [ 45.353464] freed 168-byte region [ffff88800e37c828, ffff88800e37c8d0) [ 45.355012] [ 45.355246] The buggy address belongs to the physical page: [ 45.355993] page:00000000e11a365b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe37c [ 45.357210] memcg:ffff88800f017701 [ 45.357690] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 45.358454] page_type: 0xffffffff() [ 45.358958] raw: 0100000000000200 ffff88800879fc80 ffffea0000383f40 dead000000000007 [ 45.360003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f017701 [ 45.360987] page dumped because: kasan: bad access detected [ 45.361722] [ 45.361963] Memory state around the buggy address: [ 45.362596] ffff88800e37c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 45.363559] ffff88800e37c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 45.364477] >ffff88800e37c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 45.365395] ^ [ 45.365850] ffff88800e37c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.366803] ffff88800e37c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 45.367788] ================================================================== [ 45.369291] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 47.574284] BUG: Bad rss-counter state mm:000000000bf595d1 type:MM_FILEPAGES val:33 [ 47.575306] BUG: Bad rss-counter state mm:000000000bf595d1 type:MM_ANONPAGES val:22 [ 48.125483] BUG: Bad rss-counter state mm:00000000bde5e8d5 type:MM_FILEPAGES val:33 [ 48.126659] BUG: Bad rss-counter state mm:00000000bde5e8d5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36416' (ECDSA) to the list of known hosts. 2023/06/20 03:13:25 fuzzer started 2023/06/20 03:13:26 dialing manager at localhost:44161 2023/06/20 03:13:26 checking machine... 2023/06/20 03:13:26 checking revisions... [ 48.813689] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:13:26 testing simple program... [ 48.863096] cgroup: Unknown subsys name 'net' [ 48.914647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:13:04 Registers: info registers vcpu 0 RAX=0000000080000100 RBX=ffffffff856529e0 RCX=ffffffff814c8421 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09a18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007ff6b4ed8e8e R13=0000000000000000 R14=ffff88801006b680 R15=ffff88800d8768d0 RIP=ffffffff814c01d0 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 00007ff6b49f6900 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=00007fffb5717000 CR3=00000000164ec000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=7720656c62697461706d6f63206d6874 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=706d6f63206d687469726f676c612023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007f7b60688590 CR3=0000000019cda000 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=2035323a33313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a33313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000