syzkaller login: [ 31.038512] BUG: Bad rss-counter state mm:00000000337e8cf6 type:MM_FILEPAGES val:33 [ 31.039989] BUG: Bad rss-counter state mm:00000000337e8cf6 type:MM_ANONPAGES val:22 [ 31.079223] ================================================================== [ 31.080194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.081198] Read of size 8 at addr ffff888018b17310 by task sshd/220 [ 31.081963] [ 31.082344] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.083200] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.084160] Call Trace: [ 31.084502] [ 31.084799] dump_stack_lvl+0x91/0xf0 [ 31.085296] print_report+0xcc/0x620 [ 31.085788] ? __virt_addr_valid+0x102/0x340 [ 31.086334] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.086956] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.087573] kasan_report+0xbe/0xf0 [ 31.088045] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088668] vma_interval_tree_remove+0xc75/0xec0 [ 31.089283] vma_prepare+0xc54/0x11a0 [ 31.089762] __split_vma+0x5af/0x950 [ 31.090233] ? __pfx___split_vma+0x10/0x10 [ 31.090756] ? find_held_lock+0x2c/0x110 [ 31.091294] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.091865] ? lock_is_held_type+0x9f/0x120 [ 31.092403] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.093034] ? mtree_range_walk+0x632/0x900 [ 31.093703] ? mas_walk+0x5c7/0x7c0 [ 31.094280] do_vmi_munmap+0x1f1/0x2b0 [ 31.094890] mmap_region+0x1f9/0x2660 [ 31.095471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.096094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.096977] ? __pfx_lock_acquire+0x10/0x10 [ 31.097627] ? __pfx_mmap_region+0x10/0x10 [ 31.098279] ? security_mmap_addr+0x7d/0xa0 [ 31.098939] ? get_unmapped_area+0x1f5/0x3f0 [ 31.099619] do_mmap+0x854/0xf00 [ 31.100154] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.100763] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.101483] ksys_mmap_pgoff+0x3af/0x500 [ 31.102111] do_syscall_64+0x3f/0x90 [ 31.102687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.103481] RIP: 0033:0x7f1156e36d82 [ 31.104067] 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 [ 31.106959] RSP: 002b:00007ffc180bc0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.108018] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1156e36d82 [ 31.109032] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1156270000 [ 31.110021] RBP: 00007f1156270000 R08: 0000000000000009 R09: 0000000000001000 [ 31.111004] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f9b457cd90 [ 31.111987] R13: 00007ffc180bc110 R14: 00007ffc180bc140 R15: 00007ffc180bc4a0 [ 31.112998] [ 31.113360] [ 31.113619] Allocated by task 213: [ 31.114132] kasan_save_stack+0x22/0x50 [ 31.114735] kasan_set_track+0x25/0x30 [ 31.115338] __kasan_slab_alloc+0x59/0x70 [ 31.115968] kmem_cache_alloc+0x16b/0x370 [ 31.116589] vm_area_dup+0x20/0x160 [ 31.117154] __split_vma+0x170/0x950 [ 31.117725] split_vma+0xc6/0x110 [ 31.118263] mprotect_fixup+0x8d2/0xb30 [ 31.118872] do_mprotect_pkey+0x87e/0xd40 [ 31.119495] __x64_sys_mprotect+0x78/0xc0 [ 31.120129] do_syscall_64+0x3f/0x90 [ 31.120704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.121494] [ 31.121753] Freed by task 213: [ 31.122218] kasan_save_stack+0x22/0x50 [ 31.122826] kasan_set_track+0x25/0x30 [ 31.123424] kasan_save_free_info+0x2b/0x50 [ 31.124063] __kasan_slab_free+0x10a/0x190 [ 31.124704] kmem_cache_free+0x10d/0x4d0 [ 31.125333] rcu_core+0x8c8/0x2860 [ 31.125869] __do_softirq+0x1b7/0x7d4 [ 31.126443] [ 31.126701] Last potentially related work creation: [ 31.127405] kasan_save_stack+0x22/0x50 [ 31.128012] __kasan_record_aux_stack+0x8e/0xa0 [ 31.128705] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.129501] remove_vma+0x139/0x170 [ 31.130044] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.130717] do_vmi_munmap+0x1f1/0x2b0 [ 31.131305] __vm_munmap+0x138/0x3a0 [ 31.131865] __x64_sys_munmap+0x59/0x80 [ 31.132460] do_syscall_64+0x3f/0x90 [ 31.133034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133807] [ 31.134067] The buggy address belongs to the object at ffff888018b172b8 [ 31.134067] which belongs to the cache vm_area_struct of size 168 [ 31.135836] The buggy address is located 88 bytes inside of [ 31.135836] freed 168-byte region [ffff888018b172b8, ffff888018b17360) [ 31.137540] [ 31.137799] The buggy address belongs to the physical page: [ 31.138596] page:00000000f7f71378 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18b17 [ 31.139903] memcg:ffff888017b13401 [ 31.140410] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.141198] page_type: 0xffffffff() [ 31.141735] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.142830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017b13401 [ 31.143907] page dumped because: kasan: bad access detected [ 31.144700] [ 31.144967] Memory state around the buggy address: [ 31.145661] ffff888018b17200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.146683] ffff888018b17280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.147701] >ffff888018b17300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.148717] ^ [ 31.149283] ffff888018b17380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.150303] ffff888018b17400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.151312] ================================================================== [ 31.152586] Disabling lock debugging due to kernel taint [ 33.168175] BUG: Bad rss-counter state mm:00000000152815e6 type:MM_FILEPAGES val:33 [ 33.169271] BUG: Bad rss-counter state mm:00000000152815e6 type:MM_ANONPAGES val:22 [ 33.714544] BUG: Bad rss-counter state mm:00000000903cc091 type:MM_FILEPAGES val:33 [ 33.715531] BUG: Bad rss-counter state mm:00000000903cc091 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58970' (ECDSA) to the list of known hosts. 2023/06/19 17:08:54 fuzzer started 2023/06/19 17:08:54 dialing manager at localhost:44161 2023/06/19 17:08:54 checking machine... 2023/06/19 17:08:54 checking revisions... [ 34.329721] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:08:54 testing simple program... [ 34.382210] cgroup: Unknown subsys name 'net' [ 34.424159] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:08:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f90caa2c1a0 CR3=000000000f2da000 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=4944a3379ab0618f4d48f0d7cbefec57 XMM02=00000000001208c0ec2efd57dc4c00df XMM03=00000000001260c034578d084e22ad00 XMM04=cc60c61b0e4586c800000000000ae988 XMM05=19e9129bd510f23500000000001357b0 XMM06=a7900c7f0b85e69f0000000000134618 XMM07=e042d86d42eb936e0000000000126340 XMM08=34578d084e22ad000000000000120920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000038 RCX=ffffffff8217c554 RDX=ffff88800f1751c0 RSI=0000000000000038 RDI=ffff888015c57bf8 RBP=00007ffec96be708 RSP=ffff888015c57ba0 R8 =0000000000000006 R9 =00007ffec96be6d0 R10=00007ffec96be708 R11=0000000000000000 R12=00007ffec96be6d0 R13=ffff888015c57bf8 R14=0000000000000000 R15=ffff888015c57cd8 RIP=ffffffff8180fd58 RFL=00000293 [--S-A-C] 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 00007f9e75144900 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=00007ffec96bb000 CR3=000000000d620000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000