[ 40.170901] BUG: Bad rss-counter state mm:000000000b31ede2 type:MM_FILEPAGES val:33 [ 40.172148] BUG: Bad rss-counter state mm:000000000b31ede2 type:MM_ANONPAGES val:22 [ 40.287628] ================================================================== [ 40.288423] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.289228] Read of size 8 at addr ffff88800db9ba50 by task sshd/218 [ 40.289900] [ 40.290087] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.290832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.291667] Call Trace: [ 40.292119] [ 40.292373] dump_stack_lvl+0x91/0xf0 [ 40.292802] print_report+0xcc/0x620 [ 40.293227] ? __virt_addr_valid+0x102/0x340 [ 40.293709] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.294364] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.295027] kasan_report+0xbe/0xf0 [ 40.295637] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.296424] vma_interval_tree_remove+0xc75/0xec0 [ 40.297191] vma_prepare+0xc54/0x11a0 [ 40.297825] __split_vma+0x5af/0x950 [ 40.298441] ? __pfx___split_vma+0x10/0x10 [ 40.299131] ? find_held_lock+0x2c/0x110 [ 40.299819] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.300570] ? lock_is_held_type+0x9f/0x120 [ 40.301266] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.302066] ? mtree_range_walk+0x632/0x900 [ 40.302795] ? mas_walk+0x5c7/0x7c0 [ 40.303409] do_vmi_munmap+0x1f1/0x2b0 [ 40.304056] mmap_region+0x1f9/0x2660 [ 40.304708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.305387] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.306310] ? __pfx_lock_acquire+0x10/0x10 [ 40.306890] ? __pfx_mmap_region+0x10/0x10 [ 40.307464] ? security_mmap_addr+0x7d/0xa0 [ 40.308041] ? get_unmapped_area+0x1f5/0x3f0 [ 40.308598] do_mmap+0x854/0xf00 [ 40.309043] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.309581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.310208] ksys_mmap_pgoff+0x3af/0x500 [ 40.310760] do_syscall_64+0x3f/0x90 [ 40.311280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.311982] RIP: 0033:0x7f1efc27cd82 [ 40.312481] 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 [ 40.314831] RSP: 002b:00007ffee42b9fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.315827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1efc27cd82 [ 40.316751] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1efb6b6000 [ 40.317658] RBP: 00007f1efb6b6000 R08: 0000000000000009 R09: 0000000000001000 [ 40.318603] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d76cdaf70 [ 40.319533] R13: 00007ffee42b9fd0 R14: 00007ffee42ba000 R15: 00007ffee42ba360 [ 40.320444] [ 40.320745] [ 40.320960] Allocated by task 211: [ 40.321423] kasan_save_stack+0x22/0x50 [ 40.321993] kasan_set_track+0x25/0x30 [ 40.322553] __kasan_slab_alloc+0x59/0x70 [ 40.323138] kmem_cache_alloc+0x16b/0x370 [ 40.323656] vm_area_dup+0x20/0x160 [ 40.324113] __split_vma+0x170/0x950 [ 40.324635] split_vma+0xc6/0x110 [ 40.325140] mprotect_fixup+0x8d2/0xb30 [ 40.325742] do_mprotect_pkey+0x87e/0xd40 [ 40.326342] __x64_sys_mprotect+0x78/0xc0 [ 40.326947] do_syscall_64+0x3f/0x90 [ 40.327493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.328215] [ 40.328430] Freed by task 211: [ 40.328836] kasan_save_stack+0x22/0x50 [ 40.329368] kasan_set_track+0x25/0x30 [ 40.329944] kasan_save_free_info+0x2b/0x50 [ 40.330563] __kasan_slab_free+0x10a/0x190 [ 40.331164] kmem_cache_free+0x10d/0x4d0 [ 40.331668] rcu_core+0x8c8/0x2860 [ 40.332132] __do_softirq+0x1b7/0x7d4 [ 40.332663] [ 40.332903] Last potentially related work creation: [ 40.333548] kasan_save_stack+0x22/0x50 [ 40.334113] __kasan_record_aux_stack+0x8e/0xa0 [ 40.334746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.335432] remove_vma+0x139/0x170 [ 40.335883] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.336440] do_vmi_munmap+0x1f1/0x2b0 [ 40.336929] __vm_munmap+0x138/0x3a0 [ 40.337433] __x64_sys_munmap+0x59/0x80 [ 40.338000] do_syscall_64+0x3f/0x90 [ 40.338531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.339232] [ 40.339447] The buggy address belongs to the object at ffff88800db9b9f8 [ 40.339447] which belongs to the cache vm_area_struct of size 168 [ 40.340996] The buggy address is located 88 bytes inside of [ 40.340996] freed 168-byte region [ffff88800db9b9f8, ffff88800db9baa0) [ 40.342594] [ 40.342838] The buggy address belongs to the physical page: [ 40.343526] page:000000009e360629 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb9b [ 40.344681] memcg:ffff88800e479e01 [ 40.345163] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.345867] page_type: 0xffffffff() [ 40.346349] raw: 0100000000000200 ffff88800879fc80 ffffea000037dd00 dead000000000003 [ 40.347388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e479e01 [ 40.348315] page dumped because: kasan: bad access detected [ 40.349064] [ 40.349291] Memory state around the buggy address: [ 40.349893] ffff88800db9b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.350841] ffff88800db9b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 40.351829] >ffff88800db9ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.352728] ^ [ 40.353434] ffff88800db9ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.354350] ffff88800db9bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.355348] ================================================================== [ 40.356652] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 42.383874] BUG: Bad rss-counter state mm:00000000879cdf70 type:MM_FILEPAGES val:33 [ 42.384941] BUG: Bad rss-counter state mm:00000000879cdf70 type:MM_ANONPAGES val:22 [ 42.924283] BUG: Bad rss-counter state mm:00000000a3da39f7 type:MM_FILEPAGES val:33 [ 42.925469] BUG: Bad rss-counter state mm:00000000a3da39f7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28788' (ECDSA) to the list of known hosts. 2023/06/20 06:29:13 fuzzer started 2023/06/20 06:29:13 dialing manager at localhost:44161 2023/06/20 06:29:13 checking machine... 2023/06/20 06:29:13 checking revisions... [ 43.591985] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:29:13 testing simple program... [ 43.634028] cgroup: Unknown subsys name 'net' [ 43.674264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:28:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000077 RCX=ffffffff83726394 RDX=ffff88800f159b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000078 RSP=ffff888015d477b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96e98 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 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 00007f777b84f900 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=00007f777be06618 CR3=000000000907c000 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=00007f65c9f20150 CR3=000000000cae0000 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=0f9c560b0970dea0454162c95deccab1 XMM02=2c67c8bc2e329bc3000000000011ce28 XMM03=fb795ef6d65770560000000000123c78 XMM04=aa332ec784043e3800000000000ae988 XMM05=751b9502027dc0b90000000000133558 XMM06=7787ef8f59797af50000000000132730 XMM07=e042d86d42eb936e0000000000123f50 XMM08=e5f7438254f919d2000000000011ce88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000