syzkaller login: [ 33.425783] BUG: Bad rss-counter state mm:00000000b8090659 type:MM_FILEPAGES val:33 [ 33.426734] BUG: Bad rss-counter state mm:00000000b8090659 type:MM_ANONPAGES val:22 [ 33.590497] ================================================================== [ 33.591465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.592786] Read of size 8 at addr ffff8880147cc228 by task sshd/221 [ 33.593814] [ 33.594158] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.595335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.596478] Call Trace: [ 33.596825] [ 33.597168] dump_stack_lvl+0x91/0xf0 [ 33.597711] print_report+0xcc/0x620 [ 33.598270] ? __virt_addr_valid+0x102/0x340 [ 33.598826] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.599543] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.600209] kasan_report+0xbe/0xf0 [ 33.600693] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.601438] vma_interval_tree_remove+0xc75/0xec0 [ 33.602083] vma_prepare+0xc54/0x11a0 [ 33.602600] __split_vma+0x5af/0x950 [ 33.603164] ? __pfx___split_vma+0x10/0x10 [ 33.603729] ? find_held_lock+0x2c/0x110 [ 33.604290] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.604920] ? lock_is_held_type+0x9f/0x120 [ 33.605524] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.606192] ? mtree_range_walk+0x632/0x900 [ 33.606771] ? mas_walk+0x5c7/0x7c0 [ 33.607314] do_vmi_munmap+0x1f1/0x2b0 [ 33.607815] mmap_region+0x1f9/0x2660 [ 33.608349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.608930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.609697] ? __pfx_lock_acquire+0x10/0x10 [ 33.610323] ? __pfx_mmap_region+0x10/0x10 [ 33.610949] ? security_mmap_addr+0x7d/0xa0 [ 33.611520] ? get_unmapped_area+0x1f5/0x3f0 [ 33.612109] do_mmap+0x854/0xf00 [ 33.612600] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.613189] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.613795] ksys_mmap_pgoff+0x3af/0x500 [ 33.614344] do_syscall_64+0x3f/0x90 [ 33.614834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.615491] RIP: 0033:0x7f0cabe0ad82 [ 33.615949] 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 [ 33.618121] RSP: 002b:00007ffc3462c468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.619031] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0cabe0ad82 [ 33.619885] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0cab244000 [ 33.620728] RBP: 00007f0cab244000 R08: 0000000000000009 R09: 0000000000001000 [ 33.621600] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556757f35ec0 [ 33.622502] R13: 00007ffc3462c480 R14: 00007ffc3462c4b0 R15: 00007ffc3462c810 [ 33.623393] [ 33.623700] [ 33.623921] Allocated by task 214: [ 33.624361] kasan_save_stack+0x22/0x50 [ 33.624882] kasan_set_track+0x25/0x30 [ 33.625390] __kasan_slab_alloc+0x59/0x70 [ 33.625934] kmem_cache_alloc+0x16b/0x370 [ 33.626468] vm_area_dup+0x20/0x160 [ 33.626931] __split_vma+0x170/0x950 [ 33.627422] split_vma+0xc6/0x110 [ 33.627872] mprotect_fixup+0x8d2/0xb30 [ 33.628386] do_mprotect_pkey+0x87e/0xd40 [ 33.628919] __x64_sys_mprotect+0x78/0xc0 [ 33.629452] do_syscall_64+0x3f/0x90 [ 33.629948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.630606] [ 33.630825] Freed by task 214: [ 33.631221] kasan_save_stack+0x22/0x50 [ 33.631733] kasan_set_track+0x25/0x30 [ 33.632239] kasan_save_free_info+0x2b/0x50 [ 33.632779] __kasan_slab_free+0x10a/0x190 [ 33.633323] kmem_cache_free+0x10d/0x4d0 [ 33.633881] rcu_core+0x8c8/0x2860 [ 33.634343] __do_softirq+0x1b7/0x7d4 [ 33.634821] [ 33.635035] Last potentially related work creation: [ 33.635644] kasan_save_stack+0x22/0x50 [ 33.636166] __kasan_record_aux_stack+0x8e/0xa0 [ 33.636746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.637425] remove_vma+0x139/0x170 [ 33.637868] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.638417] do_vmi_munmap+0x1f1/0x2b0 [ 33.638877] __vm_munmap+0x138/0x3a0 [ 33.639319] __x64_sys_munmap+0x59/0x80 [ 33.639788] do_syscall_64+0x3f/0x90 [ 33.640241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.640860] [ 33.641072] The buggy address belongs to the object at ffff8880147cc1d0 [ 33.641072] which belongs to the cache vm_area_struct of size 168 [ 33.642535] The buggy address is located 88 bytes inside of [ 33.642535] freed 168-byte region [ffff8880147cc1d0, ffff8880147cc278) [ 33.643893] [ 33.644102] The buggy address belongs to the physical page: [ 33.644753] page:000000007655ec0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147cc [ 33.645823] memcg:ffff88801030fc01 [ 33.646251] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.646889] page_type: 0xffffffff() [ 33.647335] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.648226] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801030fc01 [ 33.649098] page dumped because: kasan: bad access detected [ 33.649732] [ 33.649956] Memory state around the buggy address: [ 33.650513] ffff8880147cc100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.651340] ffff8880147cc180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.652160] >ffff8880147cc200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.652975] ^ [ 33.653502] ffff8880147cc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.654337] ffff8880147cc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.655152] ================================================================== [ 33.656040] Disabling lock debugging due to kernel taint [ 36.462156] BUG: Bad rss-counter state mm:000000005de45f38 type:MM_FILEPAGES val:33 [ 36.463117] BUG: Bad rss-counter state mm:000000005de45f38 type:MM_ANONPAGES val:22 [ 36.957338] BUG: Bad rss-counter state mm:00000000f8ba8652 type:MM_FILEPAGES val:33 [ 36.958368] BUG: Bad rss-counter state mm:00000000f8ba8652 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18466' (ECDSA) to the list of known hosts. 2023/06/20 01:38:34 fuzzer started 2023/06/20 01:38:35 dialing manager at localhost:44161 2023/06/20 01:38:35 checking machine... 2023/06/20 01:38:35 checking revisions... [ 37.690551] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:38:35 testing simple program... [ 37.744536] cgroup: Unknown subsys name 'net' [ 37.782974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:38:32 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000003 RCX=0000000000000004 RDX=1ffffd4000077c06 RSI=1ffffd40000a2ce1 RDI=ffffea00003be030 RBP=ffffea00003be000 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc6d8 R10=ffffea00003be630 R11=000000000000ef98 R12=0000000000000004 R13=ffffea00003be400 R14=ffffea00003be400 R15=ffff88807ffdc500 RIP=ffffffff81789b6d RFL=00000046 [---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 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=00007fffba376328 CR3=0000000005482000 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=00007f0c0d8d4510000055afceb5b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a8d7 RBX=ffffffff860546b8 RCX=ffffffff84601449 RDX=000000000000000f RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff8605469c RSP=ffff88806cf099b8 R8 =ffffffff864baff8 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546d8 R13=ffffffff8605469c R14=ffffffff8605469c R15=dffffc0000000000 RIP=ffffffff8112fc7a 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 00007fa75abee900 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=00007fa75b1a5618 CR3=000000000cba8000 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=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