syzkaller login: [ 41.154365] BUG: Bad rss-counter state mm:00000000a769f467 type:MM_FILEPAGES val:33 [ 41.155813] BUG: Bad rss-counter state mm:00000000a769f467 type:MM_ANONPAGES val:22 [ 41.309441] ================================================================== [ 41.310346] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.311293] Read of size 8 at addr ffff88800c952310 by task sshd/220 [ 41.312069] [ 41.312291] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.313254] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.314233] Call Trace: [ 41.314554] [ 41.314852] dump_stack_lvl+0x91/0xf0 [ 41.315346] print_report+0xcc/0x620 [ 41.315870] ? __virt_addr_valid+0x102/0x340 [ 41.316426] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.317048] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.317667] kasan_report+0xbe/0xf0 [ 41.318143] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.318777] vma_interval_tree_remove+0xc75/0xec0 [ 41.319388] vma_prepare+0xc54/0x11a0 [ 41.319877] __split_vma+0x5af/0x950 [ 41.320360] ? __pfx___split_vma+0x10/0x10 [ 41.320902] ? find_held_lock+0x2c/0x110 [ 41.321422] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.321998] ? lock_is_held_type+0x9f/0x120 [ 41.322544] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.323159] ? mtree_range_walk+0x632/0x900 [ 41.323736] ? mas_walk+0x5c7/0x7c0 [ 41.324221] do_vmi_munmap+0x1f1/0x2b0 [ 41.324720] mmap_region+0x1f9/0x2660 [ 41.325219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.325752] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.326498] ? __pfx_lock_acquire+0x10/0x10 [ 41.327042] ? __pfx_mmap_region+0x10/0x10 [ 41.327600] ? security_mmap_addr+0x7d/0xa0 [ 41.328135] ? get_unmapped_area+0x1f5/0x3f0 [ 41.328695] do_mmap+0x854/0xf00 [ 41.329140] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.329652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.330225] ksys_mmap_pgoff+0x3af/0x500 [ 41.330742] do_syscall_64+0x3f/0x90 [ 41.331222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.331886] RIP: 0033:0x7fd5a94ccd82 [ 41.332351] 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 [ 41.334517] RSP: 002b:00007fffbba46598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.335456] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5a94ccd82 [ 41.336315] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5a8906000 [ 41.337183] RBP: 00007fd5a8906000 R08: 0000000000000009 R09: 0000000000001000 [ 41.338052] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c900132ec0 [ 41.338904] R13: 00007fffbba465b0 R14: 00007fffbba465e0 R15: 00007fffbba46940 [ 41.339795] [ 41.340101] [ 41.340323] Allocated by task 213: [ 41.340763] kasan_save_stack+0x22/0x50 [ 41.341276] kasan_set_track+0x25/0x30 [ 41.341774] __kasan_slab_alloc+0x59/0x70 [ 41.342316] kmem_cache_alloc+0x16b/0x370 [ 41.342836] vm_area_dup+0x20/0x160 [ 41.343294] __split_vma+0x170/0x950 [ 41.343791] split_vma+0xc6/0x110 [ 41.344235] mprotect_fixup+0x8d2/0xb30 [ 41.344744] do_mprotect_pkey+0x87e/0xd40 [ 41.345272] __x64_sys_mprotect+0x78/0xc0 [ 41.345806] do_syscall_64+0x3f/0x90 [ 41.346295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.346952] [ 41.347174] Freed by task 213: [ 41.347582] kasan_save_stack+0x22/0x50 [ 41.348096] kasan_set_track+0x25/0x30 [ 41.348605] kasan_save_free_info+0x2b/0x50 [ 41.349153] __kasan_slab_free+0x10a/0x190 [ 41.349696] kmem_cache_free+0x10d/0x4d0 [ 41.350229] rcu_core+0x8c8/0x2860 [ 41.350676] __do_softirq+0x1b7/0x7d4 [ 41.351161] [ 41.351384] Last potentially related work creation: [ 41.351980] kasan_save_stack+0x22/0x50 [ 41.352485] __kasan_record_aux_stack+0x8e/0xa0 [ 41.353066] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.353715] remove_vma+0x139/0x170 [ 41.354173] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.354734] do_vmi_munmap+0x1f1/0x2b0 [ 41.355228] __vm_munmap+0x138/0x3a0 [ 41.355719] __x64_sys_munmap+0x59/0x80 [ 41.356228] do_syscall_64+0x3f/0x90 [ 41.356714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.357365] [ 41.357591] The buggy address belongs to the object at ffff88800c9522b8 [ 41.357591] which belongs to the cache vm_area_struct of size 168 [ 41.359081] The buggy address is located 88 bytes inside of [ 41.359081] freed 168-byte region [ffff88800c9522b8, ffff88800c952360) [ 41.360536] [ 41.360752] The buggy address belongs to the physical page: [ 41.361422] page:000000003629ea57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc952 [ 41.362525] memcg:ffff888009a4dd01 [ 41.362960] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.363642] page_type: 0xffffffff() [ 41.364100] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.365035] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a4dd01 [ 41.365953] page dumped because: kasan: bad access detected [ 41.366626] [ 41.366842] Memory state around the buggy address: [ 41.367433] ffff88800c952200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.368305] ffff88800c952280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.369208] >ffff88800c952300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.370060] ^ [ 41.370527] ffff88800c952380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.371407] ffff88800c952400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.372277] ================================================================== [ 41.373507] Disabling lock debugging due to kernel taint [ 43.195321] BUG: Bad rss-counter state mm:000000001ac03294 type:MM_FILEPAGES val:33 [ 43.196138] BUG: Bad rss-counter state mm:000000001ac03294 type:MM_ANONPAGES val:22 [ 43.677210] BUG: Bad rss-counter state mm:00000000ab57471f type:MM_FILEPAGES val:33 [ 43.678257] BUG: Bad rss-counter state mm:00000000ab57471f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61751' (ECDSA) to the list of known hosts. 2023/06/19 22:44:46 fuzzer started 2023/06/19 22:44:46 dialing manager at localhost:44161 2023/06/19 22:44:46 checking machine... 2023/06/19 22:44:46 checking revisions... [ 44.418709] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:44:46 testing simple program... [ 44.467458] cgroup: Unknown subsys name 'net' [ 44.515737] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:33 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=00007f508304c000 CR3=000000000d9ce000 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=d1351da32ca064895c43ebafa89911b2 XMM02=000000000011c740eff9b2d0a8fce9cb XMM03=000000000011c8102c67c8bc2e329bc3 XMM04=0b6203ac227d94a200000000000ae988 XMM05=19e9129bd510f2350000000000133b40 XMM06=5b209f3a948cf66900000000001329a8 XMM07=e042d86d42eb936e00000000001242d8 XMM08=afb9cdfc241a3db2000000000011c810 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c969e7 RBX=0000000000000002 RCX=ffffffff864b4f38 RDX=0000000000000001 RSI=dffffc0000000000 RDI=ffffffff864b4f3a RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b4f3c R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fe8 R15=ffff88806cf09a98 RIP=ffffffff811311c3 RFL=00000216 [----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 00007fc2ef9ae900 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=00007fc2ef98d020 CR3=0000000018ed8000 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