syzkaller login: [ 32.616128] BUG: Bad rss-counter state mm:000000003a2a6263 type:MM_FILEPAGES val:33 [ 32.617444] BUG: Bad rss-counter state mm:000000003a2a6263 type:MM_ANONPAGES val:22 [ 32.767527] ================================================================== [ 32.768446] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.769386] Read of size 8 at addr ffff88800e010a50 by task sshd/221 [ 32.770279] [ 32.770515] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.771396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.772428] Call Trace: [ 32.772751] [ 32.773048] dump_stack_lvl+0x91/0xf0 [ 32.773546] print_report+0xcc/0x620 [ 32.774033] ? __virt_addr_valid+0x102/0x340 [ 32.774622] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.775254] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.775882] kasan_report+0xbe/0xf0 [ 32.776395] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.777035] vma_interval_tree_remove+0xc75/0xec0 [ 32.777641] vma_prepare+0xc54/0x11a0 [ 32.778122] __split_vma+0x5af/0x950 [ 32.778618] ? __pfx___split_vma+0x10/0x10 [ 32.779153] ? find_held_lock+0x2c/0x110 [ 32.779682] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.780253] ? lock_is_held_type+0x9f/0x120 [ 32.780798] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.781416] ? mtree_range_walk+0x632/0x900 [ 32.781975] ? mas_walk+0x5c7/0x7c0 [ 32.782474] do_vmi_munmap+0x1f1/0x2b0 [ 32.782970] mmap_region+0x1f9/0x2660 [ 32.783474] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.783985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.784716] ? __pfx_lock_acquire+0x10/0x10 [ 32.785264] ? __pfx_mmap_region+0x10/0x10 [ 32.785801] ? security_mmap_addr+0x7d/0xa0 [ 32.786349] ? get_unmapped_area+0x1f5/0x3f0 [ 32.786928] do_mmap+0x854/0xf00 [ 32.787378] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.787873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.788450] ksys_mmap_pgoff+0x3af/0x500 [ 32.788968] do_syscall_64+0x3f/0x90 [ 32.789467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.790121] RIP: 0033:0x7f20360acd82 [ 32.790592] 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 [ 32.792732] RSP: 002b:00007fffb9585b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.793642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20360acd82 [ 32.794509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20354e6000 [ 32.795364] RBP: 00007f20354e6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.796221] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f00d54b20 [ 32.797081] R13: 00007fffb9585b80 R14: 00007fffb9585bb0 R15: 00007fffb9585f10 [ 32.797942] [ 32.798278] [ 32.798520] Allocated by task 213: [ 32.798976] kasan_save_stack+0x22/0x50 [ 32.799494] kasan_set_track+0x25/0x30 [ 32.799989] __kasan_slab_alloc+0x59/0x70 [ 32.800511] kmem_cache_alloc+0x16b/0x370 [ 32.801033] vm_area_dup+0x20/0x160 [ 32.801503] __split_vma+0x170/0x950 [ 32.801973] split_vma+0xc6/0x110 [ 32.802424] mprotect_fixup+0x8d2/0xb30 [ 32.802942] do_mprotect_pkey+0x87e/0xd40 [ 32.803467] __x64_sys_mprotect+0x78/0xc0 [ 32.804005] do_syscall_64+0x3f/0x90 [ 32.804482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.805130] [ 32.805345] Freed by task 213: [ 32.805739] kasan_save_stack+0x22/0x50 [ 32.806255] kasan_set_track+0x25/0x30 [ 32.806778] kasan_save_free_info+0x2b/0x50 [ 32.807326] __kasan_slab_free+0x10a/0x190 [ 32.807857] kmem_cache_free+0x10d/0x4d0 [ 32.808380] rcu_core+0x8c8/0x2860 [ 32.808829] __do_softirq+0x1b7/0x7d4 [ 32.809314] [ 32.809529] Last potentially related work creation: [ 32.810128] kasan_save_stack+0x22/0x50 [ 32.810649] __kasan_record_aux_stack+0x8e/0xa0 [ 32.811240] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.811891] remove_vma+0x139/0x170 [ 32.812354] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.812919] do_vmi_munmap+0x1f1/0x2b0 [ 32.813417] __vm_munmap+0x138/0x3a0 [ 32.813897] __x64_sys_munmap+0x59/0x80 [ 32.814410] do_syscall_64+0x3f/0x90 [ 32.814898] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.815542] [ 32.815761] The buggy address belongs to the object at ffff88800e0109f8 [ 32.815761] which belongs to the cache vm_area_struct of size 168 [ 32.817248] The buggy address is located 88 bytes inside of [ 32.817248] freed 168-byte region [ffff88800e0109f8, ffff88800e010aa0) [ 32.818687] [ 32.818910] The buggy address belongs to the physical page: [ 32.819579] page:00000000b49cc508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe010 [ 32.820670] memcg:ffff8880098b3c01 [ 32.821104] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.821756] page_type: 0xffffffff() [ 32.822210] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.823151] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098b3c01 [ 32.824063] page dumped because: kasan: bad access detected [ 32.824739] [ 32.824962] Memory state around the buggy address: [ 32.825549] ffff88800e010900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.826435] ffff88800e010980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.827305] >ffff88800e010a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.828173] ^ [ 32.828874] ffff88800e010a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.829734] ffff88800e010b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.830603] ================================================================== [ 32.831575] Disabling lock debugging due to kernel taint [ 35.398872] BUG: Bad rss-counter state mm:00000000d7f62baf type:MM_FILEPAGES val:33 [ 35.399840] BUG: Bad rss-counter state mm:00000000d7f62baf type:MM_ANONPAGES val:22 [ 35.854034] BUG: Bad rss-counter state mm:0000000048ee6305 type:MM_FILEPAGES val:33 [ 35.855125] BUG: Bad rss-counter state mm:0000000048ee6305 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63316' (ECDSA) to the list of known hosts. 2023/06/19 19:36:17 fuzzer started 2023/06/19 19:36:18 dialing manager at localhost:44161 2023/06/19 19:36:18 checking machine... 2023/06/19 19:36:18 checking revisions... [ 36.580111] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:36:18 testing simple program... [ 36.621061] cgroup: Unknown subsys name 'net' [ 36.663240] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:36:13 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=00007f78cfbfc6e0 CR3=000000000d866000 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=85d6adc0b118619bf44841a273012816 XMM02=ec2efd57dc4c00df000000000011da20 XMM03=defd5067d1488669000000000011daf0 XMM04=461601ce768db82b00000000000ae988 XMM05=e4cb8bb95a7664b60000000000134298 XMM06=346d4d7d1769b0510000000000133100 XMM07=e042d86d42eb936e00000000001249b0 XMM08=defd5067d1488669000000000011daf0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000015f8976e20 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000015 RSI=ffff88806cf28140 RDI=0000000000053c5d RBP=ffff88806cf28140 RSP=ffff88806cf09818 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000efcd1 R11=0000000000000001 R12=0000000000053c5d R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff811062a5 RFL=00000013 [----A-C] 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 00007f921ad2b900 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=00007f921b2e2618 CR3=000000000c950000 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