[ 39.240344] BUG: Bad rss-counter state mm:000000007cef4c2a type:MM_FILEPAGES val:33 [ 39.241020] BUG: Bad rss-counter state mm:000000007cef4c2a type:MM_ANONPAGES val:22 [ 39.367194] ================================================================== [ 39.367863] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.368521] Read of size 8 at addr ffff88800c51b310 by task sshd/225 [ 39.369019] [ 39.369165] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.369728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.370374] Call Trace: [ 39.370587] [ 39.370776] dump_stack_lvl+0x91/0xf0 [ 39.371109] print_report+0xcc/0x620 [ 39.371478] ? __virt_addr_valid+0x102/0x340 [ 39.372116] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.372588] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.373031] kasan_report+0xbe/0xf0 [ 39.373378] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.373851] vma_interval_tree_remove+0xc75/0xec0 [ 39.374302] vma_prepare+0xc54/0x11a0 [ 39.374649] __split_vma+0x5af/0x950 [ 39.375029] ? __pfx___split_vma+0x10/0x10 [ 39.375409] ? find_held_lock+0x2c/0x110 [ 39.375866] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.376285] ? lock_is_held_type+0x9f/0x120 [ 39.376682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.377144] ? mtree_range_walk+0x632/0x900 [ 39.377554] ? mas_walk+0x5c7/0x7c0 [ 39.377913] do_vmi_munmap+0x1f1/0x2b0 [ 39.378304] mmap_region+0x1f9/0x2660 [ 39.378674] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.379075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.379640] ? __pfx_lock_acquire+0x10/0x10 [ 39.380019] ? __pfx_mmap_region+0x10/0x10 [ 39.380404] ? security_mmap_addr+0x7d/0xa0 [ 39.380793] ? get_unmapped_area+0x1f5/0x3f0 [ 39.381202] do_mmap+0x854/0xf00 [ 39.381525] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.381912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.382327] ksys_mmap_pgoff+0x3af/0x500 [ 39.382693] do_syscall_64+0x3f/0x90 [ 39.383045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.383528] RIP: 0033:0x7f92db0e4d82 [ 39.383866] 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 [ 39.385466] RSP: 002b:00007ffd32ccb758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.386148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f92db0e4d82 [ 39.386790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f92da51e000 [ 39.387419] RBP: 00007f92da51e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.388085] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddbd3faf70 [ 39.388717] R13: 00007ffd32ccb770 R14: 00007ffd32ccb7a0 R15: 00007ffd32ccbb00 [ 39.389345] [ 39.389565] [ 39.389724] Allocated by task 212: [ 39.390032] kasan_save_stack+0x22/0x50 [ 39.390397] kasan_set_track+0x25/0x30 [ 39.390761] __kasan_slab_alloc+0x59/0x70 [ 39.391157] kmem_cache_alloc+0x16b/0x370 [ 39.391533] vm_area_dup+0x20/0x160 [ 39.391889] __split_vma+0x170/0x950 [ 39.392243] split_vma+0xc6/0x110 [ 39.392572] mprotect_fixup+0x8d2/0xb30 [ 39.392948] do_mprotect_pkey+0x87e/0xd40 [ 39.393343] __x64_sys_mprotect+0x78/0xc0 [ 39.393723] do_syscall_64+0x3f/0x90 [ 39.394067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.394534] [ 39.394682] Freed by task 203: [ 39.394969] kasan_save_stack+0x22/0x50 [ 39.395330] kasan_set_track+0x25/0x30 [ 39.395682] kasan_save_free_info+0x2b/0x50 [ 39.396066] __kasan_slab_free+0x10a/0x190 [ 39.396459] kmem_cache_free+0x10d/0x4d0 [ 39.396812] rcu_core+0x8c8/0x2860 [ 39.397151] __do_softirq+0x1b7/0x7d4 [ 39.397502] [ 39.397651] Last potentially related work creation: [ 39.398092] kasan_save_stack+0x22/0x50 [ 39.398454] __kasan_record_aux_stack+0x8e/0xa0 [ 39.398874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.399334] remove_vma+0x139/0x170 [ 39.399658] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.400077] do_vmi_munmap+0x1f1/0x2b0 [ 39.400439] __vm_munmap+0x138/0x3a0 [ 39.400773] __x64_sys_munmap+0x59/0x80 [ 39.401133] do_syscall_64+0x3f/0x90 [ 39.401466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.401935] [ 39.402091] Second to last potentially related work creation: [ 39.402594] kasan_save_stack+0x22/0x50 [ 39.402942] __kasan_record_aux_stack+0x8e/0xa0 [ 39.403377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.404373] remove_vma+0x139/0x170 [ 39.404704] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.405101] do_vmi_munmap+0x1f1/0x2b0 [ 39.405443] mmap_region+0x1f9/0x2660 [ 39.405801] do_mmap+0x854/0xf00 [ 39.406101] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.406440] ksys_mmap_pgoff+0x3af/0x500 [ 39.406794] do_syscall_64+0x3f/0x90 [ 39.407135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.407591] [ 39.407786] The buggy address belongs to the object at ffff88800c51b2b8 [ 39.407786] which belongs to the cache vm_area_struct of size 168 [ 39.408845] The buggy address is located 88 bytes inside of [ 39.408845] freed 168-byte region [ffff88800c51b2b8, ffff88800c51b360) [ 39.409836] [ 39.409992] The buggy address belongs to the physical page: [ 39.410467] page:00000000e7a8cab6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc51b [ 39.411244] memcg:ffff8880095ecf01 [ 39.411535] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.411995] page_type: 0xffffffff() [ 39.412303] raw: 0100000000000200 ffff88800879fc80 ffffea00003194c0 dead000000000002 [ 39.413067] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095ecf01 [ 39.413714] page dumped because: kasan: bad access detected [ 39.414201] [ 39.414365] Memory state around the buggy address: [ 39.414792] ffff88800c51b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.415428] ffff88800c51b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.416093] >ffff88800c51b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.416725] ^ [ 39.417072] ffff88800c51b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.417691] ffff88800c51b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.418341] ================================================================== [ 39.419073] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 41.269533] BUG: Bad rss-counter state mm:000000005026ccff type:MM_FILEPAGES val:33 [ 41.270305] BUG: Bad rss-counter state mm:000000005026ccff type:MM_ANONPAGES val:22 [ 41.639600] BUG: Bad rss-counter state mm:000000006ff5c54a type:MM_FILEPAGES val:33 [ 41.640653] BUG: Bad rss-counter state mm:000000006ff5c54a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32181' (ECDSA) to the list of known hosts. 2023/06/20 08:44:36 fuzzer started 2023/06/20 08:44:36 dialing manager at localhost:44161 2023/06/20 08:44:36 checking machine... 2023/06/20 08:44:36 checking revisions... [ 42.319826] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:44:36 testing simple program... [ 42.362835] cgroup: Unknown subsys name 'net' [ 42.408609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:27 Registers: info registers vcpu 0 RAX=1ffffffff0bb1081 RBX=ffffffff85d8840c RCX=ffffffff810bd046 RDX=0000000000000002 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff88806ce099e0 R8 =ffffffff86088c1a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88410 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000217 [----APC] 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 00007f904672e900 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=00007f9046ce5618 CR3=000000001038e000 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=00007fbefa801338 CR3=000000000e2b8000 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=2036333a34343a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000