syzkaller login: [ 30.075730] BUG: Bad rss-counter state mm:0000000005293c8b type:MM_FILEPAGES val:33 [ 30.077665] BUG: Bad rss-counter state mm:0000000005293c8b type:MM_ANONPAGES val:22 [ 30.242453] ================================================================== [ 30.243535] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.244677] Read of size 8 at addr ffff88800cb67b38 by task sshd/221 [ 30.245758] [ 30.246025] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.247058] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.248156] Call Trace: [ 30.248490] [ 30.248786] dump_stack_lvl+0x91/0xf0 [ 30.249301] print_report+0xcc/0x620 [ 30.249800] ? __virt_addr_valid+0x102/0x340 [ 30.250368] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251007] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.251638] kasan_report+0xbe/0xf0 [ 30.252129] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.252759] vma_interval_tree_remove+0xc75/0xec0 [ 30.253408] vma_prepare+0xc54/0x11a0 [ 30.253910] __split_vma+0x5af/0x950 [ 30.254396] ? __pfx___split_vma+0x10/0x10 [ 30.254956] ? find_held_lock+0x2c/0x110 [ 30.255502] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.256088] ? lock_is_held_type+0x9f/0x120 [ 30.256630] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.257239] ? mtree_range_walk+0x632/0x900 [ 30.257799] ? mas_walk+0x5c7/0x7c0 [ 30.258287] do_vmi_munmap+0x1f1/0x2b0 [ 30.258785] mmap_region+0x1f9/0x2660 [ 30.259271] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.259786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.260512] ? __pfx_lock_acquire+0x10/0x10 [ 30.261053] ? __pfx_mmap_region+0x10/0x10 [ 30.261581] ? security_mmap_addr+0x7d/0xa0 [ 30.262117] ? get_unmapped_area+0x1f5/0x3f0 [ 30.262675] do_mmap+0x854/0xf00 [ 30.263114] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.263616] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.264196] ksys_mmap_pgoff+0x3af/0x500 [ 30.264727] do_syscall_64+0x3f/0x90 [ 30.265265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.265935] RIP: 0033:0x7fc7c0824d82 [ 30.266406] 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 [ 30.268639] RSP: 002b:00007ffc59eb0a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.269605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc7c0824d82 [ 30.270476] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc7bfc5e000 [ 30.271335] RBP: 00007fc7bfc5e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.272213] R10: 0000000000000812 R11: 0000000000000206 R12: 000056352db3db20 [ 30.273077] R13: 00007ffc59eb0a20 R14: 00007ffc59eb0a50 R15: 00007ffc59eb0db0 [ 30.273950] [ 30.274243] [ 30.274461] Allocated by task 214: [ 30.274897] kasan_save_stack+0x22/0x50 [ 30.275400] kasan_set_track+0x25/0x30 [ 30.275912] __kasan_slab_alloc+0x59/0x70 [ 30.276452] kmem_cache_alloc+0x16b/0x370 [ 30.276981] vm_area_dup+0x20/0x160 [ 30.277449] __split_vma+0x170/0x950 [ 30.277926] split_vma+0xc6/0x110 [ 30.278371] mprotect_fixup+0x8d2/0xb30 [ 30.278880] do_mprotect_pkey+0x87e/0xd40 [ 30.279409] __x64_sys_mprotect+0x78/0xc0 [ 30.279948] do_syscall_64+0x3f/0x90 [ 30.280432] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.281082] [ 30.281300] Freed by task 214: [ 30.281695] kasan_save_stack+0x22/0x50 [ 30.282208] kasan_set_track+0x25/0x30 [ 30.282713] kasan_save_free_info+0x2b/0x50 [ 30.283255] __kasan_slab_free+0x10a/0x190 [ 30.283792] kmem_cache_free+0x10d/0x4d0 [ 30.284318] rcu_core+0x8c8/0x2860 [ 30.284771] __do_softirq+0x1b7/0x7d4 [ 30.285253] [ 30.285470] Last potentially related work creation: [ 30.286135] kasan_save_stack+0x22/0x50 [ 30.286652] __kasan_record_aux_stack+0x8e/0xa0 [ 30.287228] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.287877] remove_vma+0x139/0x170 [ 30.288346] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.288903] do_vmi_munmap+0x1f1/0x2b0 [ 30.289397] __vm_munmap+0x138/0x3a0 [ 30.289868] __x64_sys_munmap+0x59/0x80 [ 30.290367] do_syscall_64+0x3f/0x90 [ 30.290845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.291502] [ 30.291717] Second to last potentially related work creation: [ 30.292415] kasan_save_stack+0x22/0x50 [ 30.292919] __kasan_record_aux_stack+0x8e/0xa0 [ 30.293491] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.294135] remove_vma+0x139/0x170 [ 30.294587] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295150] do_vmi_munmap+0x1f1/0x2b0 [ 30.295641] mmap_region+0x1f9/0x2660 [ 30.296150] do_mmap+0x854/0xf00 [ 30.296589] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.297078] ksys_mmap_pgoff+0x3af/0x500 [ 30.297579] do_syscall_64+0x3f/0x90 [ 30.298060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298712] [ 30.298937] The buggy address belongs to the object at ffff88800cb67ae0 [ 30.298937] which belongs to the cache vm_area_struct of size 168 [ 30.300439] The buggy address is located 88 bytes inside of [ 30.300439] freed 168-byte region [ffff88800cb67ae0, ffff88800cb67b88) [ 30.301870] [ 30.302084] The buggy address belongs to the physical page: [ 30.302759] page:00000000ed1b1014 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb67 [ 30.303879] memcg:ffff88800ec91501 [ 30.304328] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.305034] page_type: 0xffffffff() [ 30.305493] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.306420] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec91501 [ 30.307346] page dumped because: kasan: bad access detected [ 30.308036] [ 30.308252] Memory state around the buggy address: [ 30.308835] ffff88800cb67a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.309696] ffff88800cb67a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.310554] >ffff88800cb67b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.311408] ^ [ 30.312027] ffff88800cb67b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 30.312894] ffff88800cb67c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.313763] ================================================================== [ 30.314687] Disabling lock debugging due to kernel taint [ 32.308179] BUG: Bad rss-counter state mm:00000000eb1c9e72 type:MM_FILEPAGES val:33 [ 32.309415] BUG: Bad rss-counter state mm:00000000eb1c9e72 type:MM_ANONPAGES val:22 [ 32.848936] BUG: Bad rss-counter state mm:00000000bcdd0309 type:MM_FILEPAGES val:33 [ 32.850124] BUG: Bad rss-counter state mm:00000000bcdd0309 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16323' (ECDSA) to the list of known hosts. 2023/06/20 23:10:46 fuzzer started 2023/06/20 23:10:46 dialing manager at localhost:36067 2023/06/20 23:10:46 checking machine... 2023/06/20 23:10:46 checking revisions... [ 33.509262] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:10:46 testing simple program... [ 33.563979] cgroup: Unknown subsys name 'net' [ 33.619863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:45 Registers: info registers vcpu 0 RAX=0000001675597380 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=00000000000539d7 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef597 R11=0000000000000001 R12=00000000000539d7 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000012 [----A--] 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 00007f3d6b98e700 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=00007fd9e5e89618 CR3=000000001848e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732035343a3031 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f1186f9b000 CR3=000000000edba000 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=d12df6517b654fbeb948e7af30b1768f XMM02=0000000000119ff8eff9b2d0a8fce9cb XMM03=000000000011a0c82c67c8bc2e329bc3 XMM04=ad295b4070e6d39200000000000ae988 XMM05=e4cb8bb95a7664b60000000000132aa0 XMM06=fac3af7afab2dbde0000000000131908 XMM07=e042d86d42eb936e0000000000121b58 XMM08=b0be10698a73b5c2000000000011a0c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000