syzkaller login: [ 31.674478] BUG: Bad rss-counter state mm:00000000a308cc05 type:MM_FILEPAGES val:33 [ 31.675763] BUG: Bad rss-counter state mm:00000000a308cc05 type:MM_ANONPAGES val:22 [ 31.841039] ================================================================== [ 31.841947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.842868] Read of size 8 at addr ffff88800e036058 by task sshd/220 [ 31.843770] [ 31.844008] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.844849] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.845815] Call Trace: [ 31.846144] [ 31.846420] dump_stack_lvl+0x91/0xf0 [ 31.846912] print_report+0xcc/0x620 [ 31.847392] ? __virt_addr_valid+0x102/0x340 [ 31.847970] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.848583] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.849196] kasan_report+0xbe/0xf0 [ 31.849663] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.850275] vma_interval_tree_remove+0xc75/0xec0 [ 31.850862] vma_prepare+0xc54/0x11a0 [ 31.851335] __split_vma+0x5af/0x950 [ 31.851813] ? __pfx___split_vma+0x10/0x10 [ 31.852340] ? find_held_lock+0x2c/0x110 [ 31.852856] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.853416] ? lock_is_held_type+0x9f/0x120 [ 31.853951] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.854541] ? mtree_range_walk+0x632/0x900 [ 31.855082] ? mas_walk+0x5c7/0x7c0 [ 31.855552] do_vmi_munmap+0x1f1/0x2b0 [ 31.856038] mmap_region+0x1f9/0x2660 [ 31.856520] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.857033] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.857737] ? __pfx_lock_acquire+0x10/0x10 [ 31.858262] ? __pfx_mmap_region+0x10/0x10 [ 31.858794] ? security_mmap_addr+0x7d/0xa0 [ 31.859332] ? get_unmapped_area+0x1f5/0x3f0 [ 31.859905] do_mmap+0x854/0xf00 [ 31.860334] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.860825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.861388] ksys_mmap_pgoff+0x3af/0x500 [ 31.861893] do_syscall_64+0x3f/0x90 [ 31.862357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.862995] RIP: 0033:0x7fbab355dd82 [ 31.863453] 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 [ 31.865530] RSP: 002b:00007fff54325e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.866408] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbab355dd82 [ 31.867253] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbab2997000 [ 31.868105] RBP: 00007fbab2997000 R08: 0000000000000009 R09: 0000000000001000 [ 31.868949] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560380c55ec0 [ 31.869791] R13: 00007fff54325e50 R14: 00007fff54325e80 R15: 00007fff543261e0 [ 31.870634] [ 31.870921] [ 31.871131] Allocated by task 213: [ 31.871552] kasan_save_stack+0x22/0x50 [ 31.872068] kasan_set_track+0x25/0x30 [ 31.872554] __kasan_slab_alloc+0x59/0x70 [ 31.873082] kmem_cache_alloc+0x16b/0x370 [ 31.873597] vm_area_dup+0x20/0x160 [ 31.874046] __split_vma+0x170/0x950 [ 31.874533] split_vma+0xc6/0x110 [ 31.874959] mprotect_fixup+0x8d2/0xb30 [ 31.875451] do_mprotect_pkey+0x87e/0xd40 [ 31.875978] __x64_sys_mprotect+0x78/0xc0 [ 31.876508] do_syscall_64+0x3f/0x90 [ 31.876972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.877603] [ 31.877812] Freed by task 210: [ 31.878202] kasan_save_stack+0x22/0x50 [ 31.878698] kasan_set_track+0x25/0x30 [ 31.879184] kasan_save_free_info+0x2b/0x50 [ 31.879705] __kasan_slab_free+0x10a/0x190 [ 31.880249] kmem_cache_free+0x10d/0x4d0 [ 31.880762] rcu_core+0x8c8/0x2860 [ 31.881209] __do_softirq+0x1b7/0x7d4 [ 31.881680] [ 31.881891] Last potentially related work creation: [ 31.882468] kasan_save_stack+0x22/0x50 [ 31.882968] __kasan_record_aux_stack+0x8e/0xa0 [ 31.883534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.884184] remove_vma+0x139/0x170 [ 31.884690] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.885246] do_vmi_munmap+0x1f1/0x2b0 [ 31.885723] __vm_munmap+0x138/0x3a0 [ 31.886176] __x64_sys_munmap+0x59/0x80 [ 31.886659] do_syscall_64+0x3f/0x90 [ 31.887120] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.887761] [ 31.887977] Second to last potentially related work creation: [ 31.888658] kasan_save_stack+0x22/0x50 [ 31.889157] __kasan_record_aux_stack+0x8e/0xa0 [ 31.889720] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.890358] remove_vma+0x139/0x170 [ 31.890800] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.891353] do_vmi_munmap+0x1f1/0x2b0 [ 31.891845] mmap_region+0x1f9/0x2660 [ 31.892321] do_mmap+0x854/0xf00 [ 31.892743] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.893224] ksys_mmap_pgoff+0x3af/0x500 [ 31.893716] do_syscall_64+0x3f/0x90 [ 31.894190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.894818] [ 31.895033] The buggy address belongs to the object at ffff88800e036000 [ 31.895033] which belongs to the cache vm_area_struct of size 168 [ 31.896502] The buggy address is located 88 bytes inside of [ 31.896502] freed 168-byte region [ffff88800e036000, ffff88800e0360a8) [ 31.897898] [ 31.898110] The buggy address belongs to the physical page: [ 31.898754] page:000000008e7c0aa1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe036 [ 31.899838] memcg:ffff88800ed74001 [ 31.900261] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.900951] page_type: 0xffffffff() [ 31.901394] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.902300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed74001 [ 31.903198] page dumped because: kasan: bad access detected [ 31.903855] [ 31.904073] Memory state around the buggy address: [ 31.904652] ffff88800e035f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.905510] ffff88800e035f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.906357] >ffff88800e036000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.907206] ^ [ 31.907942] ffff88800e036080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.908963] ffff88800e036100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.910051] ================================================================== [ 31.911131] Disabling lock debugging due to kernel taint [ 34.838446] BUG: Bad rss-counter state mm:00000000e8e6ad9c type:MM_FILEPAGES val:33 [ 34.839439] BUG: Bad rss-counter state mm:00000000e8e6ad9c type:MM_ANONPAGES val:22 [ 35.287270] BUG: Bad rss-counter state mm:00000000365e3ee5 type:MM_FILEPAGES val:33 [ 35.288934] BUG: Bad rss-counter state mm:00000000365e3ee5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5345' (ECDSA) to the list of known hosts. 2023/06/20 02:11:54 fuzzer started 2023/06/20 02:11:54 dialing manager at localhost:44161 2023/06/20 02:11:54 checking machine... 2023/06/20 02:11:54 checking revisions... [ 35.992520] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:11:54 testing simple program... [ 36.037778] cgroup: Unknown subsys name 'net' [ 36.076079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:11:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019a4e7a0 RCX=ffffffff81534376 RDX=1ffff1100d9c747a RSI=0000000000000008 RDI=ffff88806ce3a3d0 RBP=0000000000000200 RSP=ffff88806ce09dc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff81845c80 R13=ffffea00003a4800 R14=ffff88806ce3a2c0 R15=ffff888016a99e00 RIP=ffffffff81370a74 RFL=00000012 [----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 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=00007ffc60a3f628 CR3=00000000182c2000 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=2034353a31313a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a31313a3230203032 XMM08=00000000000000000000005600000080 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=00007f907695b2d0 CR3=000000000c6d4000 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=b8f5302e9d717e8ead45ca5382bb9d5f XMM02=000000000011fd30eff9b2d0a8fce9cb XMM03=000000000011fe002c67c8bc2e329bc3 XMM04=da6514bef888a72300000000000ae988 XMM05=3a22d06b4f0dd88a0000000000135e28 XMM06=4fda316b135da52b0000000000135250 XMM07=e042d86d42eb936e00000000001246e8 XMM08=0e7191efa423407d000000000011fe00 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000