syzkaller login: [ 36.191765] BUG: Bad rss-counter state mm:0000000072190030 type:MM_FILEPAGES val:33 [ 36.192799] BUG: Bad rss-counter state mm:0000000072190030 type:MM_ANONPAGES val:22 [ 36.355896] ================================================================== [ 36.356823] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.357771] Read of size 8 at addr ffff88800f098798 by task sshd/222 [ 36.358524] [ 36.358743] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.359713] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.360684] Call Trace: [ 36.361005] [ 36.361289] dump_stack_lvl+0x91/0xf0 [ 36.361791] print_report+0xcc/0x620 [ 36.362271] ? __virt_addr_valid+0x102/0x340 [ 36.362815] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.363419] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.364035] kasan_report+0xbe/0xf0 [ 36.364514] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.365124] vma_interval_tree_remove+0xc75/0xec0 [ 36.365744] vma_prepare+0xc54/0x11a0 [ 36.366221] __split_vma+0x5af/0x950 [ 36.366686] ? __pfx___split_vma+0x10/0x10 [ 36.367209] ? find_held_lock+0x2c/0x110 [ 36.367726] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.368288] ? lock_is_held_type+0x9f/0x120 [ 36.368819] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.369415] ? mtree_range_walk+0x632/0x900 [ 36.369971] ? mas_walk+0x5c7/0x7c0 [ 36.370443] do_vmi_munmap+0x1f1/0x2b0 [ 36.370936] mmap_region+0x1f9/0x2660 [ 36.371418] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.371930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.372638] ? __pfx_lock_acquire+0x10/0x10 [ 36.373163] ? __pfx_mmap_region+0x10/0x10 [ 36.373707] ? security_mmap_addr+0x7d/0xa0 [ 36.374228] ? get_unmapped_area+0x1f5/0x3f0 [ 36.374771] do_mmap+0x854/0xf00 [ 36.375210] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.375699] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.376265] ksys_mmap_pgoff+0x3af/0x500 [ 36.376767] do_syscall_64+0x3f/0x90 [ 36.377237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.377891] RIP: 0033:0x7fa34af5dd82 [ 36.378341] 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 [ 36.380433] RSP: 002b:00007ffd2deee2e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.381332] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa34af5dd82 [ 36.382211] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa34a397000 [ 36.383041] RBP: 00007fa34a397000 R08: 0000000000000009 R09: 0000000000001000 [ 36.383883] R10: 0000000000000812 R11: 0000000000000206 R12: 000055608c20fec0 [ 36.384710] R13: 00007ffd2deee300 R14: 00007ffd2deee330 R15: 00007ffd2deee690 [ 36.385563] [ 36.385866] [ 36.386082] Allocated by task 215: [ 36.386508] kasan_save_stack+0x22/0x50 [ 36.387012] kasan_set_track+0x25/0x30 [ 36.387506] __kasan_slab_alloc+0x59/0x70 [ 36.388034] kmem_cache_alloc+0x16b/0x370 [ 36.388559] vm_area_dup+0x20/0x160 [ 36.389015] __split_vma+0x170/0x950 [ 36.389486] split_vma+0xc6/0x110 [ 36.389939] mprotect_fixup+0x8d2/0xb30 [ 36.390436] do_mprotect_pkey+0x87e/0xd40 [ 36.390958] __x64_sys_mprotect+0x78/0xc0 [ 36.391472] do_syscall_64+0x3f/0x90 [ 36.391947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.392575] [ 36.392790] Freed by task 215: [ 36.393181] kasan_save_stack+0x22/0x50 [ 36.393694] kasan_set_track+0x25/0x30 [ 36.394189] kasan_save_free_info+0x2b/0x50 [ 36.394715] __kasan_slab_free+0x10a/0x190 [ 36.395244] kmem_cache_free+0x10d/0x4d0 [ 36.395746] rcu_core+0x8c8/0x2860 [ 36.396192] __do_softirq+0x1b7/0x7d4 [ 36.396667] [ 36.396879] Last potentially related work creation: [ 36.397459] kasan_save_stack+0x22/0x50 [ 36.397972] __kasan_record_aux_stack+0x8e/0xa0 [ 36.398540] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.399179] remove_vma+0x139/0x170 [ 36.399628] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.400182] do_vmi_munmap+0x1f1/0x2b0 [ 36.400660] __vm_munmap+0x138/0x3a0 [ 36.401127] __x64_sys_munmap+0x59/0x80 [ 36.401634] do_syscall_64+0x3f/0x90 [ 36.402110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.402741] [ 36.402957] The buggy address belongs to the object at ffff88800f098740 [ 36.402957] which belongs to the cache vm_area_struct of size 168 [ 36.404419] The buggy address is located 88 bytes inside of [ 36.404419] freed 168-byte region [ffff88800f098740, ffff88800f0987e8) [ 36.405820] [ 36.406037] The buggy address belongs to the physical page: [ 36.406693] page:0000000001ca7fad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf098 [ 36.407760] memcg:ffff88800c5ef401 [ 36.408184] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.408871] page_type: 0xffffffff() [ 36.409321] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.410244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5ef401 [ 36.411137] page dumped because: kasan: bad access detected [ 36.411795] [ 36.412010] Memory state around the buggy address: [ 36.412586] ffff88800f098680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.413427] ffff88800f098700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.414286] >ffff88800f098780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.415125] ^ [ 36.415619] ffff88800f098800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 36.416465] ffff88800f098880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 36.417305] ================================================================== [ 36.418273] Disabling lock debugging due to kernel taint [ 38.270245] BUG: Bad rss-counter state mm:00000000091ceaa1 type:MM_FILEPAGES val:33 [ 38.271227] BUG: Bad rss-counter state mm:00000000091ceaa1 type:MM_ANONPAGES val:22 [ 38.743649] BUG: Bad rss-counter state mm:00000000828df9fe type:MM_FILEPAGES val:33 [ 38.744638] BUG: Bad rss-counter state mm:00000000828df9fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51224' (ECDSA) to the list of known hosts. 2023/06/19 16:59:44 fuzzer started 2023/06/19 16:59:44 dialing manager at localhost:44161 2023/06/19 16:59:44 checking machine... 2023/06/19 16:59:44 checking revisions... [ 39.432156] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:59:44 testing simple program... [ 39.470771] cgroup: Unknown subsys name 'net' [ 39.521732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:59:38 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=00007fc26b102780 CR3=000000000d79c000 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=9bcb4142a48916995749273303fd0891 XMM02=000000000011fd60eff9b2d0a8fce9cb XMM03=000000000011fe302c67c8bc2e329bc3 XMM04=520c4e6c240c743a00000000000ae988 XMM05=ce25ddb5430d17ab0000000000135160 XMM06=00c3ffa147b8d8570000000000133f50 XMM07=fb795ef6d65770560000000000124570 XMM08=2c67c8bc2e329bc3000000000011fdd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11001b45938 RDX=1ffff11001b45946 RSI=0000000000000004 RDI=ffff88800da2ca34 RBP=00000000000001d0 RSP=ffff888016e57c68 R8 =0000000000000001 R9 =ffffed1001b45942 R10=ffff88800da2ca13 R11=00000000000b6996 R12=ffff88800c82a280 R13=0000000000000000 R14=ffff88800da2c9c8 R15=ffff88800da2c980 RIP=ffffffff818472fa 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 00007f5e9e92f900 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=00007f5e9eee70b0 CR3=000000001a3e0000 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=2033343a39353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a39353a3631203931 XMM08=00007fd520031b300000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000