syzkaller login: [ 33.644207] BUG: Bad rss-counter state mm:0000000049f2ff4c type:MM_FILEPAGES val:33 [ 33.644909] BUG: Bad rss-counter state mm:0000000049f2ff4c type:MM_ANONPAGES val:22 [ 33.673148] ================================================================== [ 33.673865] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.674440] Read of size 8 at addr ffff88801469e968 by task sshd/221 [ 33.674946] [ 33.675122] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.675661] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.676266] Call Trace: [ 33.676480] [ 33.676664] dump_stack_lvl+0x91/0xf0 [ 33.677196] print_report+0xcc/0x620 [ 33.677503] ? __virt_addr_valid+0x102/0x340 [ 33.677847] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.678226] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.678593] kasan_report+0xbe/0xf0 [ 33.678877] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.679329] vma_interval_tree_remove+0xc75/0xec0 [ 33.679693] vma_prepare+0xc54/0x11a0 [ 33.679986] __split_vma+0x5af/0x950 [ 33.680273] ? __pfx___split_vma+0x10/0x10 [ 33.680599] ? find_held_lock+0x2c/0x110 [ 33.680936] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.681278] ? lock_is_held_type+0x9f/0x120 [ 33.681614] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.682031] ? mtree_range_walk+0x632/0x900 [ 33.682393] ? mas_walk+0x5c7/0x7c0 [ 33.682692] do_vmi_munmap+0x1f1/0x2b0 [ 33.683043] mmap_region+0x1f9/0x2660 [ 33.683362] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.683698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.684164] ? __pfx_lock_acquire+0x10/0x10 [ 33.684508] ? __pfx_mmap_region+0x10/0x10 [ 33.684853] ? security_mmap_addr+0x7d/0xa0 [ 33.685217] ? get_unmapped_area+0x1f5/0x3f0 [ 33.685594] do_mmap+0x854/0xf00 [ 33.685890] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.686213] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.686576] ksys_mmap_pgoff+0x3af/0x500 [ 33.686903] do_syscall_64+0x3f/0x90 [ 33.687250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.687642] RIP: 0033:0x7fc7a3c3cd82 [ 33.687911] 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 [ 33.689189] RSP: 002b:00007ffd2b229098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.689785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7a3c3cd82 [ 33.690436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7a3076000 [ 33.691107] RBP: 00007fc7a3076000 R08: 0000000000000009 R09: 0000000000001000 [ 33.691674] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ac4d8aec0 [ 33.692197] R13: 00007ffd2b2290b0 R14: 00007ffd2b2290e0 R15: 00007ffd2b229440 [ 33.692737] [ 33.692926] [ 33.693063] Allocated by task 214: [ 33.693335] kasan_save_stack+0x22/0x50 [ 33.693668] kasan_set_track+0x25/0x30 [ 33.693989] __kasan_slab_alloc+0x59/0x70 [ 33.694349] kmem_cache_alloc+0x16b/0x370 [ 33.694691] vm_area_dup+0x20/0x160 [ 33.695025] __split_vma+0x170/0x950 [ 33.695323] split_vma+0xc6/0x110 [ 33.695602] mprotect_fixup+0x8d2/0xb30 [ 33.695913] do_mprotect_pkey+0x87e/0xd40 [ 33.696243] __x64_sys_mprotect+0x78/0xc0 [ 33.696578] do_syscall_64+0x3f/0x90 [ 33.696888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.697299] [ 33.697441] Freed by task 214: [ 33.697697] kasan_save_stack+0x22/0x50 [ 33.698025] kasan_set_track+0x25/0x30 [ 33.698338] kasan_save_free_info+0x2b/0x50 [ 33.698675] __kasan_slab_free+0x10a/0x190 [ 33.699041] kmem_cache_free+0x10d/0x4d0 [ 33.699363] rcu_core+0x8c8/0x2860 [ 33.699654] __do_softirq+0x1b7/0x7d4 [ 33.699969] [ 33.700116] Last potentially related work creation: [ 33.700503] kasan_save_stack+0x22/0x50 [ 33.700830] __kasan_record_aux_stack+0x8e/0xa0 [ 33.701206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.701623] remove_vma+0x139/0x170 [ 33.701918] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.702286] do_vmi_munmap+0x1f1/0x2b0 [ 33.702606] __vm_munmap+0x138/0x3a0 [ 33.702905] __x64_sys_munmap+0x59/0x80 [ 33.703275] do_syscall_64+0x3f/0x90 [ 33.703572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.703986] [ 33.704124] The buggy address belongs to the object at ffff88801469e910 [ 33.704124] which belongs to the cache vm_area_struct of size 168 [ 33.705081] The buggy address is located 88 bytes inside of [ 33.705081] freed 168-byte region [ffff88801469e910, ffff88801469e9b8) [ 33.706025] [ 33.706177] The buggy address belongs to the physical page: [ 33.706616] page:00000000609726db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1469e [ 33.707349] memcg:ffff88800cfb5401 [ 33.707628] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.708053] page_type: 0xffffffff() [ 33.708360] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.708958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfb5401 [ 33.709561] page dumped because: kasan: bad access detected [ 33.709997] [ 33.710145] Memory state around the buggy address: [ 33.710571] ffff88801469e800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.711141] ffff88801469e880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.711696] >ffff88801469e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.712254] ^ [ 33.712779] ffff88801469e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 33.713341] ffff88801469ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.713895] ================================================================== [ 33.714769] Disabling lock debugging due to kernel taint [ 35.744860] BUG: Bad rss-counter state mm:0000000044343247 type:MM_FILEPAGES val:33 [ 35.745599] BUG: Bad rss-counter state mm:0000000044343247 type:MM_ANONPAGES val:22 [ 36.123785] BUG: Bad rss-counter state mm:000000003af6a90a type:MM_FILEPAGES val:33 [ 36.124543] BUG: Bad rss-counter state mm:000000003af6a90a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14057' (ECDSA) to the list of known hosts. 2023/06/20 09:29:40 fuzzer started 2023/06/20 09:29:40 dialing manager at localhost:44161 2023/06/20 09:29:40 checking machine... 2023/06/20 09:29:40 checking revisions... [ 36.738509] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:29:40 testing simple program... [ 36.770662] cgroup: Unknown subsys name 'net' [ 36.802227] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:29:36 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=00007fc5bd51a510 CR3=000000000f056000 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=2030343a39323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a39323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8173f0de RDI=0000000000000006 RBP=ffff88800dc75910 RSP=ffff888014777c08 R8 =0000000000000006 R9 =00007fbf263f1000 R10=00007fbf263ee000 R11=0000000000000000 R12=ffff88800dc75920 R13=ffff88800f2f0940 R14=000000000000014d R15=00007fbf263f1000 RIP=ffffffff8173f112 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 00007fbf26446900 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=00007fbf263f0008 CR3=000000000dad2000 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