syzkaller login: [ 31.172342] BUG: Bad rss-counter state mm:000000009a143915 type:MM_FILEPAGES val:33 [ 31.173527] BUG: Bad rss-counter state mm:000000009a143915 type:MM_ANONPAGES val:22 [ 31.320803] ================================================================== [ 31.321715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.322666] Read of size 8 at addr ffff88800df3a5c8 by task sshd/220 [ 31.323459] [ 31.323764] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.324709] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.325683] Call Trace: [ 31.326011] [ 31.326302] dump_stack_lvl+0x91/0xf0 [ 31.326788] print_report+0xcc/0x620 [ 31.327293] ? __virt_addr_valid+0x102/0x340 [ 31.327861] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.328488] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.329120] kasan_report+0xbe/0xf0 [ 31.329607] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330251] vma_interval_tree_remove+0xc75/0xec0 [ 31.330866] vma_prepare+0xc54/0x11a0 [ 31.331347] __split_vma+0x5af/0x950 [ 31.331817] ? __pfx___split_vma+0x10/0x10 [ 31.332344] ? find_held_lock+0x2c/0x110 [ 31.332867] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.333432] ? lock_is_held_type+0x9f/0x120 [ 31.333971] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.334571] ? mtree_range_walk+0x632/0x900 [ 31.335124] ? mas_walk+0x5c7/0x7c0 [ 31.335611] do_vmi_munmap+0x1f1/0x2b0 [ 31.336095] mmap_region+0x1f9/0x2660 [ 31.336579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.337095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.337803] ? __pfx_lock_acquire+0x10/0x10 [ 31.338334] ? __pfx_mmap_region+0x10/0x10 [ 31.338861] ? security_mmap_addr+0x7d/0xa0 [ 31.339412] ? get_unmapped_area+0x1f5/0x3f0 [ 31.339965] do_mmap+0x854/0xf00 [ 31.340411] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.340907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.341466] ksys_mmap_pgoff+0x3af/0x500 [ 31.341965] do_syscall_64+0x3f/0x90 [ 31.342441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.343086] RIP: 0033:0x7fcc3d94bd82 [ 31.343559] 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 [ 31.345688] RSP: 002b:00007ffd41508498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.346582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc3d94bd82 [ 31.347440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc3cd85000 [ 31.348286] RBP: 00007fcc3cd85000 R08: 0000000000000009 R09: 0000000000001000 [ 31.349123] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f13dd45d90 [ 31.349963] R13: 00007ffd415084b0 R14: 00007ffd415084e0 R15: 00007ffd41508840 [ 31.350820] [ 31.351111] [ 31.351332] Allocated by task 213: [ 31.351766] kasan_save_stack+0x22/0x50 [ 31.352265] kasan_set_track+0x25/0x30 [ 31.352756] __kasan_slab_alloc+0x59/0x70 [ 31.353281] kmem_cache_alloc+0x16b/0x370 [ 31.353794] vm_area_dup+0x20/0x160 [ 31.354243] __split_vma+0x170/0x950 [ 31.354704] split_vma+0xc6/0x110 [ 31.355139] mprotect_fixup+0x8d2/0xb30 [ 31.355658] do_mprotect_pkey+0x87e/0xd40 [ 31.356178] __x64_sys_mprotect+0x78/0xc0 [ 31.356701] do_syscall_64+0x3f/0x90 [ 31.357181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.357824] [ 31.358038] Freed by task 13: [ 31.358415] kasan_save_stack+0x22/0x50 [ 31.358924] kasan_set_track+0x25/0x30 [ 31.359423] kasan_save_free_info+0x2b/0x50 [ 31.359960] __kasan_slab_free+0x10a/0x190 [ 31.360488] kmem_cache_free+0x10d/0x4d0 [ 31.360988] rcu_core+0x8c8/0x2860 [ 31.361431] __do_softirq+0x1b7/0x7d4 [ 31.361906] [ 31.362118] Last potentially related work creation: [ 31.362708] kasan_save_stack+0x22/0x50 [ 31.363222] __kasan_record_aux_stack+0x8e/0xa0 [ 31.363828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.364475] remove_vma+0x139/0x170 [ 31.365000] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.365560] do_vmi_munmap+0x1f1/0x2b0 [ 31.366044] __vm_munmap+0x138/0x3a0 [ 31.366506] __x64_sys_munmap+0x59/0x80 [ 31.367000] do_syscall_64+0x3f/0x90 [ 31.367487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.368128] [ 31.368345] Second to last potentially related work creation: [ 31.369041] kasan_save_stack+0x22/0x50 [ 31.369541] __kasan_record_aux_stack+0x8e/0xa0 [ 31.370107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.370748] remove_vma+0x139/0x170 [ 31.371193] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.371753] do_vmi_munmap+0x1f1/0x2b0 [ 31.372243] mmap_region+0x1f9/0x2660 [ 31.372717] do_mmap+0x854/0xf00 [ 31.373151] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.373643] ksys_mmap_pgoff+0x3af/0x500 [ 31.374138] do_syscall_64+0x3f/0x90 [ 31.374612] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375278] [ 31.375493] The buggy address belongs to the object at ffff88800df3a570 [ 31.375493] which belongs to the cache vm_area_struct of size 168 [ 31.376964] The buggy address is located 88 bytes inside of [ 31.376964] freed 168-byte region [ffff88800df3a570, ffff88800df3a618) [ 31.378368] [ 31.378586] The buggy address belongs to the physical page: [ 31.379252] page:00000000f52819b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf3a [ 31.380344] memcg:ffff88800ea8fa01 [ 31.380775] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.381469] page_type: 0xffffffff() [ 31.381916] raw: 0100000000000200 ffff8880087a0c80 ffffea000035eec0 dead000000000003 [ 31.382831] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea8fa01 [ 31.383758] page dumped because: kasan: bad access detected [ 31.384409] [ 31.384625] Memory state around the buggy address: [ 31.385201] ffff88800df3a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.386055] ffff88800df3a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.386910] >ffff88800df3a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.387766] ^ [ 31.388425] ffff88800df3a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.389295] ffff88800df3a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.390160] ================================================================== [ 31.391104] Disabling lock debugging due to kernel taint [ 33.448921] BUG: Bad rss-counter state mm:00000000375dc7ce type:MM_FILEPAGES val:33 [ 33.449916] BUG: Bad rss-counter state mm:00000000375dc7ce type:MM_ANONPAGES val:22 [ 34.001987] BUG: Bad rss-counter state mm:00000000e280a2fe type:MM_FILEPAGES val:33 [ 34.003025] BUG: Bad rss-counter state mm:00000000e280a2fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1393' (ECDSA) to the list of known hosts. 2023/06/20 17:01:04 fuzzer started 2023/06/20 17:01:04 dialing manager at localhost:36067 2023/06/20 17:01:04 checking machine... 2023/06/20 17:01:04 checking revisions... [ 34.727755] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:01:04 testing simple program... [ 34.781019] cgroup: Unknown subsys name 'net' [ 34.818106] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:01:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=0000555a874f9980 CR3=000000000f1e0000 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=ffffffffffffffff0000000000000000 XMM02=ffffff0f0e0d0c0b0a09080706050403 XMM03=696e656420737365636341002f737973 XMM04=4c414954494e495f4345535500383736 XMM05=6765723a6d726f6674616c703d534149 XMM06=006d726f6674616c703d4d4554535953 XMM07=2f6d726f6674616c702f736563697665 XMM08=3a56000a73253a51000a73253a47000a XMM09=00000000000000000000000000000000 XMM10=00000000000020000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed100354b5b0 RBX=ffffed100354b5b1 RCX=ffffffff8452c96f RDX=ffffed100354b5b1 RSI=0000000000000008 RDI=ffff88801aa5ad80 RBP=ffffed100354b5b0 RSP=ffff88801644fb58 R8 =0000000000000001 R9 =ffffed100354b5b0 R10=ffff88801aa5ad87 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000111 R14=ffff888016666118 R15=00007fc039d6a000 RIP=ffffffff8180f189 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 00007fc039d9a900 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=00007fc039d69008 CR3=000000000dca6000 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