syzkaller login: [ 29.472271] BUG: Bad rss-counter state mm:00000000b712b49c type:MM_FILEPAGES val:33 [ 29.472811] BUG: Bad rss-counter state mm:00000000b712b49c type:MM_ANONPAGES val:22 [ 29.503361] ================================================================== [ 29.504425] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.505489] Read of size 8 at addr ffff88800e96c228 by task sshd/219 [ 29.506340] [ 29.506583] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.507563] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.508671] Call Trace: [ 29.509029] [ 29.509346] dump_stack_lvl+0x91/0xf0 [ 29.509893] print_report+0xcc/0x620 [ 29.510438] ? __virt_addr_valid+0x102/0x340 [ 29.511068] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.511763] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.512452] kasan_report+0xbe/0xf0 [ 29.512985] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.513675] vma_interval_tree_remove+0xc75/0xec0 [ 29.514344] vma_prepare+0xc54/0x11a0 [ 29.514902] __split_vma+0x5af/0x950 [ 29.515432] ? __pfx___split_vma+0x10/0x10 [ 29.516022] ? find_held_lock+0x2c/0x110 [ 29.516604] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.517232] ? lock_is_held_type+0x9f/0x120 [ 29.517834] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.518509] ? mtree_range_walk+0x632/0x900 [ 29.519129] ? mas_walk+0x5c7/0x7c0 [ 29.519657] do_vmi_munmap+0x1f1/0x2b0 [ 29.520208] mmap_region+0x1f9/0x2660 [ 29.520747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.521319] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.522109] ? __pfx_lock_acquire+0x10/0x10 [ 29.522706] ? __pfx_mmap_region+0x10/0x10 [ 29.523316] ? security_mmap_addr+0x7d/0xa0 [ 29.523908] ? get_unmapped_area+0x1f5/0x3f0 [ 29.524518] do_mmap+0x854/0xf00 [ 29.525009] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.525564] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.526187] ksys_mmap_pgoff+0x3af/0x500 [ 29.526753] do_syscall_64+0x3f/0x90 [ 29.527300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.528019] RIP: 0033:0x7f05ec188d82 [ 29.528528] 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 [ 29.530940] RSP: 002b:00007ffe2aa4c7f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.531949] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f05ec188d82 [ 29.532894] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f05eb5c2000 [ 29.533833] RBP: 00007f05eb5c2000 R08: 0000000000000009 R09: 0000000000001000 [ 29.534777] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555596d70b20 [ 29.535744] R13: 00007ffe2aa4c810 R14: 00007ffe2aa4c840 R15: 00007ffe2aa4cba0 [ 29.536715] [ 29.537041] [ 29.537280] Allocated by task 212: [ 29.537766] kasan_save_stack+0x22/0x50 [ 29.538324] kasan_set_track+0x25/0x30 [ 29.538876] __kasan_slab_alloc+0x59/0x70 [ 29.539469] kmem_cache_alloc+0x16b/0x370 [ 29.540057] vm_area_dup+0x20/0x160 [ 29.540583] __split_vma+0x170/0x950 [ 29.541120] split_vma+0xc6/0x110 [ 29.541627] mprotect_fixup+0x8d2/0xb30 [ 29.542206] do_mprotect_pkey+0x87e/0xd40 [ 29.542814] __x64_sys_mprotect+0x78/0xc0 [ 29.543407] do_syscall_64+0x3f/0x90 [ 29.543949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.544687] [ 29.544933] Freed by task 212: [ 29.545386] kasan_save_stack+0x22/0x50 [ 29.545966] kasan_set_track+0x25/0x30 [ 29.546537] kasan_save_free_info+0x2b/0x50 [ 29.547177] __kasan_slab_free+0x10a/0x190 [ 29.547793] kmem_cache_free+0x10d/0x4d0 [ 29.548379] rcu_core+0x8c8/0x2860 [ 29.548890] __do_softirq+0x1b7/0x7d4 [ 29.549447] [ 29.549698] Last potentially related work creation: [ 29.550383] kasan_save_stack+0x22/0x50 [ 29.550969] __kasan_record_aux_stack+0x8e/0xa0 [ 29.551630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.552375] remove_vma+0x139/0x170 [ 29.552901] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.553542] do_vmi_munmap+0x1f1/0x2b0 [ 29.554101] __vm_munmap+0x138/0x3a0 [ 29.554645] __x64_sys_munmap+0x59/0x80 [ 29.555235] do_syscall_64+0x3f/0x90 [ 29.555777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.556525] [ 29.556771] Second to last potentially related work creation: [ 29.557561] kasan_save_stack+0x22/0x50 [ 29.558139] __kasan_record_aux_stack+0x8e/0xa0 [ 29.558814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.559558] remove_vma+0x139/0x170 [ 29.560084] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.560728] do_vmi_munmap+0x1f1/0x2b0 [ 29.561285] __vm_munmap+0x138/0x3a0 [ 29.561815] elf_map+0x26f/0x310 [ 29.562323] load_elf_binary+0x3417/0x5030 [ 29.562942] bprm_execve+0x803/0x1940 [ 29.563484] do_execveat_common+0x734/0x8e0 [ 29.564087] __x64_sys_execve+0x93/0xc0 [ 29.564651] do_syscall_64+0x3f/0x90 [ 29.565193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.565930] [ 29.566179] The buggy address belongs to the object at ffff88800e96c1d0 [ 29.566179] which belongs to the cache vm_area_struct of size 168 [ 29.567881] The buggy address is located 88 bytes inside of [ 29.567881] freed 168-byte region [ffff88800e96c1d0, ffff88800e96c278) [ 29.569502] [ 29.569751] The buggy address belongs to the physical page: [ 29.570515] page:00000000da1395ab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe96c [ 29.571763] memcg:ffff88800c85ac01 [ 29.572254] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.572993] page_type: 0xffffffff() [ 29.573512] raw: 0100000000000200 ffff88800879fc80 ffffea000050c840 dead00000000000a [ 29.574564] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c85ac01 [ 29.575620] page dumped because: kasan: bad access detected [ 29.576383] [ 29.576631] Memory state around the buggy address: [ 29.577304] ffff88800e96c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.578285] ffff88800e96c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.579290] >ffff88800e96c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.580262] ^ [ 29.580897] ffff88800e96c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.581887] ffff88800e96c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.582871] ================================================================== [ 29.584287] Disabling lock debugging due to kernel taint [ 31.507150] BUG: Bad rss-counter state mm:00000000ef8ba042 type:MM_FILEPAGES val:33 [ 31.507890] BUG: Bad rss-counter state mm:00000000ef8ba042 type:MM_ANONPAGES val:22 [ 31.974262] BUG: Bad rss-counter state mm:00000000031f24e8 type:MM_FILEPAGES val:33 [ 31.975350] BUG: Bad rss-counter state mm:00000000031f24e8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49934' (ECDSA) to the list of known hosts. 2023/06/20 02:15:39 fuzzer started 2023/06/20 02:15:39 dialing manager at localhost:44161 2023/06/20 02:15:39 checking machine... 2023/06/20 02:15:39 checking revisions... [ 32.732297] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:15:39 testing simple program... [ 32.775569] cgroup: Unknown subsys name 'net' [ 32.818823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:15:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801660fb08 RCX=0000000000000001 RDX=1ffff11002cc1f62 RSI=ffffffff81807f5b RDI=ffff88801660fb10 RBP=0000000000000000 RSP=ffff88801660fa20 R8 =0000000000000001 R9 =ffff88801660fa80 R10=0000000000038001 R11=0000000000021ee6 R12=ffff88801660fb08 R13=0000000000000000 R14=ffff8880158b8000 R15=ffff88800db5b130 RIP=ffffffff813ad485 RFL=00000287 [--S--PC] 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 00007fc77472b900 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=00007fc774ce2618 CR3=000000000df12000 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=ffff888008c58400 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=00007fde617ed8d0 CR3=0000000019f48000 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=2039333a35313a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a35313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000