syzkaller login: [ 31.094051] BUG: Bad rss-counter state mm:0000000022736999 type:MM_FILEPAGES val:33 [ 31.095093] BUG: Bad rss-counter state mm:0000000022736999 type:MM_ANONPAGES val:22 [ 31.266242] ================================================================== [ 31.267329] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.268519] Read of size 8 at addr ffff88800d90ced8 by task sshd/219 [ 31.269405] [ 31.269662] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.270702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271855] Call Trace: [ 31.272233] [ 31.272572] dump_stack_lvl+0x91/0xf0 [ 31.273157] print_report+0xcc/0x620 [ 31.273764] ? __virt_addr_valid+0x102/0x340 [ 31.274427] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275155] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.275893] kasan_report+0xbe/0xf0 [ 31.276456] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277198] vma_interval_tree_remove+0xc75/0xec0 [ 31.278119] vma_prepare+0xc54/0x11a0 [ 31.278862] __split_vma+0x5af/0x950 [ 31.279576] ? __pfx___split_vma+0x10/0x10 [ 31.280393] ? find_held_lock+0x2c/0x110 [ 31.281187] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.282064] ? lock_is_held_type+0x9f/0x120 [ 31.282900] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.283838] ? mtree_range_walk+0x632/0x900 [ 31.284687] ? mas_walk+0x5c7/0x7c0 [ 31.285446] do_vmi_munmap+0x1f1/0x2b0 [ 31.286212] mmap_region+0x1f9/0x2660 [ 31.286958] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287748] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288847] ? __pfx_lock_acquire+0x10/0x10 [ 31.289623] ? __pfx_mmap_region+0x10/0x10 [ 31.290239] ? security_mmap_addr+0x7d/0xa0 [ 31.290873] ? get_unmapped_area+0x1f5/0x3f0 [ 31.291488] do_mmap+0x854/0xf00 [ 31.291995] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.292558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.293199] ksys_mmap_pgoff+0x3af/0x500 [ 31.293798] do_syscall_64+0x3f/0x90 [ 31.294340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295066] RIP: 0033:0x7f891f4fed82 [ 31.295579] 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 [ 31.297999] RSP: 002b:00007fffd9ba90a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.299027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f891f4fed82 [ 31.300016] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f891e938000 [ 31.300997] RBP: 00007f891e938000 R08: 0000000000000009 R09: 0000000000001000 [ 31.302000] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555e752e2b20 [ 31.302995] R13: 00007fffd9ba90c0 R14: 00007fffd9ba90f0 R15: 00007fffd9ba9450 [ 31.303995] [ 31.304334] [ 31.304585] Allocated by task 212: [ 31.305076] kasan_save_stack+0x22/0x50 [ 31.305689] kasan_set_track+0x25/0x30 [ 31.306261] __kasan_slab_alloc+0x59/0x70 [ 31.306876] kmem_cache_alloc+0x16b/0x370 [ 31.307473] vm_area_dup+0x20/0x160 [ 31.308003] __split_vma+0x170/0x950 [ 31.308537] split_vma+0xc6/0x110 [ 31.309093] mprotect_fixup+0x8d2/0xb30 [ 31.309691] do_mprotect_pkey+0x87e/0xd40 [ 31.310288] __x64_sys_mprotect+0x78/0xc0 [ 31.310889] do_syscall_64+0x3f/0x90 [ 31.311442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.312184] [ 31.312435] Freed by task 212: [ 31.312886] kasan_save_stack+0x22/0x50 [ 31.313493] kasan_set_track+0x25/0x30 [ 31.314062] kasan_save_free_info+0x2b/0x50 [ 31.314677] __kasan_slab_free+0x10a/0x190 [ 31.315292] kmem_cache_free+0x10d/0x4d0 [ 31.315879] rcu_core+0x8c8/0x2860 [ 31.316398] __do_softirq+0x1b7/0x7d4 [ 31.316952] [ 31.317205] Last potentially related work creation: [ 31.317897] kasan_save_stack+0x22/0x50 [ 31.318476] __kasan_record_aux_stack+0x8e/0xa0 [ 31.319133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.319871] remove_vma+0x139/0x170 [ 31.320387] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.321020] do_vmi_munmap+0x1f1/0x2b0 [ 31.321594] __vm_munmap+0x138/0x3a0 [ 31.322126] __x64_sys_munmap+0x59/0x80 [ 31.322687] do_syscall_64+0x3f/0x90 [ 31.323215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323935] [ 31.324178] Second to last potentially related work creation: [ 31.324955] kasan_save_stack+0x22/0x50 [ 31.325536] __kasan_record_aux_stack+0x8e/0xa0 [ 31.326181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.326920] remove_vma+0x139/0x170 [ 31.327438] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.328080] do_vmi_munmap+0x1f1/0x2b0 [ 31.328641] mmap_region+0x1f9/0x2660 [ 31.329189] do_mmap+0x854/0xf00 [ 31.329702] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.330373] ksys_mmap_pgoff+0x3af/0x500 [ 31.330926] do_syscall_64+0x3f/0x90 [ 31.331448] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332165] [ 31.332403] The buggy address belongs to the object at ffff88800d90ce80 [ 31.332403] which belongs to the cache vm_area_struct of size 168 [ 31.334038] The buggy address is located 88 bytes inside of [ 31.334038] freed 168-byte region [ffff88800d90ce80, ffff88800d90cf28) [ 31.335594] [ 31.335837] The buggy address belongs to the physical page: [ 31.336617] page:0000000019d53b32 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd90c [ 31.337906] memcg:ffff88800d6e5901 [ 31.338377] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.339151] page_type: 0xffffffff() [ 31.339646] raw: 0100000000000200 ffff8880087a0c80 ffffea000032bf80 dead000000000003 [ 31.340657] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6e5901 [ 31.341672] page dumped because: kasan: bad access detected [ 31.342390] [ 31.342626] Memory state around the buggy address: [ 31.343252] ffff88800d90cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.344172] ffff88800d90ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.345094] >ffff88800d90ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.346017] ^ [ 31.346789] ffff88800d90cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.347695] ffff88800d90cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.348600] ================================================================== [ 31.349688] Disabling lock debugging due to kernel taint [ 33.309694] BUG: Bad rss-counter state mm:0000000043d4f061 type:MM_FILEPAGES val:33 [ 33.310608] BUG: Bad rss-counter state mm:0000000043d4f061 type:MM_ANONPAGES val:22 [ 33.878671] BUG: Bad rss-counter state mm:00000000f6d1b4dd type:MM_FILEPAGES val:33 [ 33.879574] BUG: Bad rss-counter state mm:00000000f6d1b4dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35750' (ECDSA) to the list of known hosts. 2023/06/20 17:28:23 fuzzer started 2023/06/20 17:28:23 dialing manager at localhost:36067 2023/06/20 17:28:23 checking machine... 2023/06/20 17:28:23 checking revisions... [ 34.579340] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:28:23 testing simple program... [ 34.627217] cgroup: Unknown subsys name 'net' [ 34.666462] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:28:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863b3584 RDX=1ffff11002f86f11 RSI=1ffff11002f86f10 RDI=1ffff11002f86f10 RBP=ffff888017c37880 RSP=ffff888017c377b8 R8 =ffffffff863b3588 R9 =ffff888017c37868 R10=0000000000038001 R11=000000000008a96a R12=ffff888017c37888 R13=ffff888017c37870 R14=ffff888017c37f40 R15=ffff888017c37828 RIP=ffffffff811310ce 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 00007f737abac900 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=00007f737b161650 CR3=000000000e63e000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800908f508 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000039500 RDI=ffff888008c0442c RBP=ffff888008c04400 RSP=ffff88800908f420 R8 =dffffc0000000000 R9 =0000000000000000 R10=ffff888008dcc080 R11=0000000000000000 R12=ffff88800908f53c R13=0000000000000001 R14=000000000001d400 R15=0000000000000075 RIP=ffffffff81269723 RFL=00000016 [----AP-] 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 00007f6c168b1900 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=00007f6c15d108a0 CR3=0000000009a3a000 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=2271461eb0249e92d343dab1850cd9bb XMM02=2c67c8bc2e329bc30000000000119c50 XMM03=fb795ef6d657705600000000001214f8 XMM04=928f0d195b7677b900000000000ae988 XMM05=fc6d9ce4f94a22a000000000001330f0 XMM06=806171799158d9670000000000132518 XMM07=e042d86d42eb936e0000000000121778 XMM08=aba4795dca55ed5b0000000000119cb0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000