syzkaller login: [ 31.208458] BUG: Bad rss-counter state mm:00000000190284e6 type:MM_FILEPAGES val:33 [ 31.209912] BUG: Bad rss-counter state mm:00000000190284e6 type:MM_ANONPAGES val:22 [ 31.377797] ================================================================== [ 31.378672] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.379644] Read of size 8 at addr ffff88800edf0968 by task sshd/222 [ 31.380383] [ 31.380602] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.381586] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.382529] Call Trace: [ 31.382843] [ 31.383122] dump_stack_lvl+0x91/0xf0 [ 31.383641] print_report+0xcc/0x620 [ 31.384114] ? __virt_addr_valid+0x102/0x340 [ 31.384649] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385254] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.385858] kasan_report+0xbe/0xf0 [ 31.386333] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.386934] vma_interval_tree_remove+0xc75/0xec0 [ 31.387530] vma_prepare+0xc54/0x11a0 [ 31.387998] __split_vma+0x5af/0x950 [ 31.388455] ? __pfx___split_vma+0x10/0x10 [ 31.389005] ? find_held_lock+0x2c/0x110 [ 31.389551] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.390129] ? lock_is_held_type+0x9f/0x120 [ 31.390677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.391305] ? mtree_range_walk+0x632/0x900 [ 31.391854] ? mas_walk+0x5c7/0x7c0 [ 31.392327] do_vmi_munmap+0x1f1/0x2b0 [ 31.392823] mmap_region+0x1f9/0x2660 [ 31.393303] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.393822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.394552] ? __pfx_lock_acquire+0x10/0x10 [ 31.395093] ? __pfx_mmap_region+0x10/0x10 [ 31.395655] ? security_mmap_addr+0x7d/0xa0 [ 31.396198] ? get_unmapped_area+0x1f5/0x3f0 [ 31.396751] do_mmap+0x854/0xf00 [ 31.397200] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.397707] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.398285] ksys_mmap_pgoff+0x3af/0x500 [ 31.398804] do_syscall_64+0x3f/0x90 [ 31.399306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399947] RIP: 0033:0x7faa9a150d82 [ 31.400406] 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 [ 31.402529] RSP: 002b:00007ffddd299cb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.403449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa9a150d82 [ 31.404291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa9958a000 [ 31.405134] RBP: 00007faa9958a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.405977] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0fc7a9ec0 [ 31.406817] R13: 00007ffddd299cd0 R14: 00007ffddd299d00 R15: 00007ffddd29a060 [ 31.407675] [ 31.407968] [ 31.408182] Allocated by task 215: [ 31.408604] kasan_save_stack+0x22/0x50 [ 31.409111] kasan_set_track+0x25/0x30 [ 31.409606] __kasan_slab_alloc+0x59/0x70 [ 31.410153] kmem_cache_alloc+0x16b/0x370 [ 31.410665] vm_area_dup+0x20/0x160 [ 31.411124] __split_vma+0x170/0x950 [ 31.411613] split_vma+0xc6/0x110 [ 31.412049] mprotect_fixup+0x8d2/0xb30 [ 31.412549] do_mprotect_pkey+0x87e/0xd40 [ 31.413065] __x64_sys_mprotect+0x78/0xc0 [ 31.413584] do_syscall_64+0x3f/0x90 [ 31.414051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.414689] [ 31.414910] Freed by task 215: [ 31.415326] kasan_save_stack+0x22/0x50 [ 31.415822] kasan_set_track+0x25/0x30 [ 31.416313] kasan_save_free_info+0x2b/0x50 [ 31.416847] __kasan_slab_free+0x10a/0x190 [ 31.417375] kmem_cache_free+0x10d/0x4d0 [ 31.417886] rcu_core+0x8c8/0x2860 [ 31.418332] __do_softirq+0x1b7/0x7d4 [ 31.418803] [ 31.419019] Last potentially related work creation: [ 31.419614] kasan_save_stack+0x22/0x50 [ 31.420112] __kasan_record_aux_stack+0x8e/0xa0 [ 31.420676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.421322] remove_vma+0x139/0x170 [ 31.421811] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.422367] do_vmi_munmap+0x1f1/0x2b0 [ 31.422846] __vm_munmap+0x138/0x3a0 [ 31.423322] __x64_sys_munmap+0x59/0x80 [ 31.423819] do_syscall_64+0x3f/0x90 [ 31.424293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424926] [ 31.425142] Second to last potentially related work creation: [ 31.425809] kasan_save_stack+0x22/0x50 [ 31.426306] __kasan_record_aux_stack+0x8e/0xa0 [ 31.426877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.427516] remove_vma+0x139/0x170 [ 31.427962] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.428511] do_vmi_munmap+0x1f1/0x2b0 [ 31.428991] mmap_region+0x1f9/0x2660 [ 31.429469] do_mmap+0x854/0xf00 [ 31.429897] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.430382] ksys_mmap_pgoff+0x3af/0x500 [ 31.430885] do_syscall_64+0x3f/0x90 [ 31.431377] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.432013] [ 31.432229] The buggy address belongs to the object at ffff88800edf0910 [ 31.432229] which belongs to the cache vm_area_struct of size 168 [ 31.433675] The buggy address is located 88 bytes inside of [ 31.433675] freed 168-byte region [ffff88800edf0910, ffff88800edf09b8) [ 31.435057] [ 31.435277] The buggy address belongs to the physical page: [ 31.435927] page:000000009697d453 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedf0 [ 31.436997] memcg:ffff88801886f401 [ 31.437416] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.438066] page_type: 0xffffffff() [ 31.438521] raw: 0100000000000200 ffff88800879fc80 ffffea0000380c80 dead000000000008 [ 31.439488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801886f401 [ 31.440431] page dumped because: kasan: bad access detected [ 31.441088] [ 31.441308] Memory state around the buggy address: [ 31.441925] ffff88800edf0800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.442839] ffff88800edf0880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.443754] >ffff88800edf0900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.444672] ^ [ 31.445513] ffff88800edf0980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.446449] ffff88800edf0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.447349] ================================================================== [ 31.448428] Disabling lock debugging due to kernel taint [ 33.413315] BUG: Bad rss-counter state mm:000000005eed874e type:MM_FILEPAGES val:33 [ 33.414091] BUG: Bad rss-counter state mm:000000005eed874e type:MM_ANONPAGES val:22 [ 33.950308] BUG: Bad rss-counter state mm:000000006776a1ed type:MM_FILEPAGES val:33 [ 33.951548] BUG: Bad rss-counter state mm:000000006776a1ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14691' (ECDSA) to the list of known hosts. 2023/06/19 21:22:01 fuzzer started 2023/06/19 21:22:01 dialing manager at localhost:44161 2023/06/19 21:22:01 checking machine... 2023/06/19 21:22:01 checking revisions... [ 34.581416] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:22:01 testing simple program... [ 34.634806] cgroup: Unknown subsys name 'net' [ 34.686564] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:00 Registers: info registers vcpu 0 RAX=000000009c9f7c00 RBX=ffff88809c9f7c00 RCX=ffffffff8114313a RDX=dffffc0000000000 RSI=000000001c9f7c00 RDI=ffff88809c9f7c00 RBP=000000001c9f7c00 RSP=ffff88801698fb68 R8 =0000000000000006 R9 =ffff88801c9f7c00 R10=ffff88809c9f7c00 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=ffff88800e4f4b40 RIP=ffffffff814c02f8 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 00007fe7c7401900 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=00007fe7c79b8618 CR3=000000001a19a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055755483aa50 RCX=0000000000000000 RDX=0000000000000000 RSI=0000557556551e00 RDI=00007f8838003fa0 RBP=00007f883c006e30 RSP=00007f88409c8808 R8 =00007f883c007038 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=00007f88409c88d0 R13=0000557556551e00 R14=0000000000000000 R15=0000557556555a20 RIP=00005575547a8622 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f88409c9700 00000000 00000000 GS =0000 0000000000000000 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=00007fb66695c160 CR3=0000000009cfa000 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=733a646873732878696e755f6d617020 XMM01=736f6c63206e6f6973736573203a296e XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a32323a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000