[ 42.876353] BUG: Bad rss-counter state mm:000000002dd9b329 type:MM_FILEPAGES val:33 [ 42.877383] BUG: Bad rss-counter state mm:000000002dd9b329 type:MM_ANONPAGES val:22 [ 43.047429] ================================================================== [ 43.048348] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.049297] Read of size 8 at addr ffff88800e1663f8 by task sshd/219 [ 43.050080] [ 43.050302] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.051273] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.052283] Call Trace: [ 43.052624] [ 43.052923] dump_stack_lvl+0x91/0xf0 [ 43.053418] print_report+0xcc/0x620 [ 43.053911] ? __virt_addr_valid+0x102/0x340 [ 43.054467] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.055084] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.055705] kasan_report+0xbe/0xf0 [ 43.056200] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.056838] vma_interval_tree_remove+0xc75/0xec0 [ 43.057455] vma_prepare+0xc54/0x11a0 [ 43.057937] __split_vma+0x5af/0x950 [ 43.058411] ? __pfx___split_vma+0x10/0x10 [ 43.058942] ? find_held_lock+0x2c/0x110 [ 43.059464] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.060044] ? lock_is_held_type+0x9f/0x120 [ 43.060591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.061201] ? mtree_range_walk+0x632/0x900 [ 43.061755] ? mas_walk+0x5c7/0x7c0 [ 43.062230] do_vmi_munmap+0x1f1/0x2b0 [ 43.062727] mmap_region+0x1f9/0x2660 [ 43.063217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.063738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.064489] ? __pfx_lock_acquire+0x10/0x10 [ 43.065032] ? __pfx_mmap_region+0x10/0x10 [ 43.065571] ? security_mmap_addr+0x7d/0xa0 [ 43.066141] ? get_unmapped_area+0x1f5/0x3f0 [ 43.066698] do_mmap+0x854/0xf00 [ 43.067147] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.067654] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.068226] ksys_mmap_pgoff+0x3af/0x500 [ 43.068738] do_syscall_64+0x3f/0x90 [ 43.069226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.069870] RIP: 0033:0x7f7cd9db1d82 [ 43.070334] 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 [ 43.072507] RSP: 002b:00007ffeee1fdeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.073431] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cd9db1d82 [ 43.074302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cd91eb000 [ 43.075147] RBP: 00007f7cd91eb000 R08: 0000000000000009 R09: 0000000000001000 [ 43.076014] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621b8b7d980 [ 43.076871] R13: 00007ffeee1fded0 R14: 00007ffeee1fdf00 R15: 00007ffeee1fe260 [ 43.077736] [ 43.078036] [ 43.078255] Allocated by task 211: [ 43.078684] kasan_save_stack+0x22/0x50 [ 43.079197] kasan_set_track+0x25/0x30 [ 43.079699] __kasan_slab_alloc+0x59/0x70 [ 43.080238] kmem_cache_alloc+0x16b/0x370 [ 43.080755] vm_area_dup+0x20/0x160 [ 43.081211] __split_vma+0x170/0x950 [ 43.081682] split_vma+0xc6/0x110 [ 43.082132] mprotect_fixup+0x8d2/0xb30 [ 43.082638] do_mprotect_pkey+0x87e/0xd40 [ 43.083161] __x64_sys_mprotect+0x78/0xc0 [ 43.083683] do_syscall_64+0x3f/0x90 [ 43.084179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.084830] [ 43.085046] Freed by task 203: [ 43.085441] kasan_save_stack+0x22/0x50 [ 43.085955] kasan_set_track+0x25/0x30 [ 43.086449] kasan_save_free_info+0x2b/0x50 [ 43.086980] __kasan_slab_free+0x10a/0x190 [ 43.087514] kmem_cache_free+0x10d/0x4d0 [ 43.088047] rcu_core+0x8c8/0x2860 [ 43.088492] __do_softirq+0x1b7/0x7d4 [ 43.088973] [ 43.089188] Last potentially related work creation: [ 43.089786] kasan_save_stack+0x22/0x50 [ 43.090290] __kasan_record_aux_stack+0x8e/0xa0 [ 43.090880] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.091542] remove_vma+0x139/0x170 [ 43.092022] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.092579] do_vmi_munmap+0x1f1/0x2b0 [ 43.093067] __vm_munmap+0x138/0x3a0 [ 43.093539] __x64_sys_munmap+0x59/0x80 [ 43.094039] do_syscall_64+0x3f/0x90 [ 43.094518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.095166] [ 43.095383] The buggy address belongs to the object at ffff88800e1663a0 [ 43.095383] which belongs to the cache vm_area_struct of size 168 [ 43.096871] The buggy address is located 88 bytes inside of [ 43.096871] freed 168-byte region [ffff88800e1663a0, ffff88800e166448) [ 43.098274] [ 43.098500] The buggy address belongs to the physical page: [ 43.099164] page:00000000be348f6a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe166 [ 43.100278] memcg:ffff88800dd3e101 [ 43.100717] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.101379] page_type: 0xffffffff() [ 43.101834] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.102774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd3e101 [ 43.103695] page dumped because: kasan: bad access detected [ 43.104389] [ 43.104606] Memory state around the buggy address: [ 43.105192] ffff88800e166280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 43.106076] ffff88800e166300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 43.106941] >ffff88800e166380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.107808] ^ [ 43.108666] ffff88800e166400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.109523] ffff88800e166480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.110373] ================================================================== [ 43.111348] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.632088] BUG: Bad rss-counter state mm:00000000d1e68d66 type:MM_FILEPAGES val:33 [ 45.633344] BUG: Bad rss-counter state mm:00000000d1e68d66 type:MM_ANONPAGES val:22 [ 46.093297] BUG: Bad rss-counter state mm:00000000e3aa7158 type:MM_FILEPAGES val:33 [ 46.094288] BUG: Bad rss-counter state mm:00000000e3aa7158 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27563' (ECDSA) to the list of known hosts. 2023/06/19 23:42:40 fuzzer started 2023/06/19 23:42:40 dialing manager at localhost:44161 2023/06/19 23:42:40 checking machine... 2023/06/19 23:42:40 checking revisions... [ 46.840353] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:42:40 testing simple program... [ 46.879648] cgroup: Unknown subsys name 'net' [ 46.939583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:42:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c1387 RSI=ffffffff81288f48 RDI=ffff88806ce09b6c RBP=ffff88806ce09c38 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff888014694a00 RIP=ffffffff813ad4f7 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 0000000000000000 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=00007f7fdf232db0 CR3=0000000015ac0000 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=2030343a32343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a32343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016c0f220 RCX=ffffffff86128101 RDX=1ffff11002d81e45 RSI=ffffffff84506c7f RDI=ffff888016c0f228 RBP=0000000000000009 RSP=ffff888016c0f138 R8 =ffffffff86128140 R9 =ffff888016c0f198 R10=0000000000038001 R11=000000000001e4e6 R12=ffff888016c0f220 R13=0000000000000000 R14=ffff88800f12b680 R15=ffff88800dfc24c0 RIP=ffffffff813ad46e RFL=00000212 [----A--] 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 00007fc68ff1a900 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=00007fc68fedf008 CR3=000000000feb2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000