syzkaller login: [ 38.677705] BUG: Bad rss-counter state mm:000000000c59fddb type:MM_FILEPAGES val:33 [ 38.678722] BUG: Bad rss-counter state mm:000000000c59fddb type:MM_ANONPAGES val:22 [ 38.849205] ================================================================== [ 38.850126] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.851075] Read of size 8 at addr ffff88800d592228 by task sshd/218 [ 38.851997] [ 38.852218] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.853136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.854144] Call Trace: [ 38.854483] [ 38.854777] dump_stack_lvl+0x91/0xf0 [ 38.855293] print_report+0xcc/0x620 [ 38.855825] ? __virt_addr_valid+0x102/0x340 [ 38.856395] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857017] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.857650] kasan_report+0xbe/0xf0 [ 38.858132] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.858777] vma_interval_tree_remove+0xc75/0xec0 [ 38.859385] vma_prepare+0xc54/0x11a0 [ 38.859880] __split_vma+0x5af/0x950 [ 38.860357] ? __pfx___split_vma+0x10/0x10 [ 38.860887] ? find_held_lock+0x2c/0x110 [ 38.861411] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.861977] ? lock_is_held_type+0x9f/0x120 [ 38.862519] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.863132] ? mtree_range_walk+0x632/0x900 [ 38.863704] ? mas_walk+0x5c7/0x7c0 [ 38.864180] do_vmi_munmap+0x1f1/0x2b0 [ 38.864676] mmap_region+0x1f9/0x2660 [ 38.865163] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.866391] ? __pfx_lock_acquire+0x10/0x10 [ 38.866921] ? __pfx_mmap_region+0x10/0x10 [ 38.867472] ? security_mmap_addr+0x7d/0xa0 [ 38.868025] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868579] do_mmap+0x854/0xf00 [ 38.869024] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.870103] ksys_mmap_pgoff+0x3af/0x500 [ 38.870624] do_syscall_64+0x3f/0x90 [ 38.871116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871787] RIP: 0033:0x7f7099e7ed82 [ 38.872240] 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 [ 38.874421] RSP: 002b:00007ffe090a7b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.875334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7099e7ed82 [ 38.876210] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70992b8000 [ 38.877071] RBP: 00007f70992b8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.877936] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616cec44ec0 [ 38.878778] R13: 00007ffe090a7b80 R14: 00007ffe090a7bb0 R15: 00007ffe090a7f10 [ 38.879659] [ 38.879953] [ 38.880177] Allocated by task 211: [ 38.880613] kasan_save_stack+0x22/0x50 [ 38.881120] kasan_set_track+0x25/0x30 [ 38.881623] __kasan_slab_alloc+0x59/0x70 [ 38.882154] kmem_cache_alloc+0x16b/0x370 [ 38.882681] vm_area_dup+0x20/0x160 [ 38.883140] __split_vma+0x170/0x950 [ 38.883626] split_vma+0xc6/0x110 [ 38.884070] mprotect_fixup+0x8d2/0xb30 [ 38.884586] do_mprotect_pkey+0x87e/0xd40 [ 38.885113] __x64_sys_mprotect+0x78/0xc0 [ 38.885641] do_syscall_64+0x3f/0x90 [ 38.886119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886756] [ 38.886974] Freed by task 211: [ 38.887362] kasan_save_stack+0x22/0x50 [ 38.887886] kasan_set_track+0x25/0x30 [ 38.888378] kasan_save_free_info+0x2b/0x50 [ 38.888923] __kasan_slab_free+0x10a/0x190 [ 38.889458] kmem_cache_free+0x10d/0x4d0 [ 38.889974] rcu_core+0x8c8/0x2860 [ 38.890421] __do_softirq+0x1b7/0x7d4 [ 38.890913] [ 38.891132] Last potentially related work creation: [ 38.891727] kasan_save_stack+0x22/0x50 [ 38.892233] __kasan_record_aux_stack+0x8e/0xa0 [ 38.892814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893545] remove_vma+0x139/0x170 [ 38.893996] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894552] do_vmi_munmap+0x1f1/0x2b0 [ 38.895036] __vm_munmap+0x138/0x3a0 [ 38.895527] __x64_sys_munmap+0x59/0x80 [ 38.896025] do_syscall_64+0x3f/0x90 [ 38.896506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.897150] [ 38.897370] Second to last potentially related work creation: [ 38.898052] kasan_save_stack+0x22/0x50 [ 38.898573] __kasan_record_aux_stack+0x8e/0xa0 [ 38.899148] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.899806] remove_vma+0x139/0x170 [ 38.900256] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.900816] do_vmi_munmap+0x1f1/0x2b0 [ 38.901301] mmap_region+0x1f9/0x2660 [ 38.901776] do_mmap+0x854/0xf00 [ 38.902214] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.902699] ksys_mmap_pgoff+0x3af/0x500 [ 38.903201] do_syscall_64+0x3f/0x90 [ 38.903693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.904336] [ 38.904554] The buggy address belongs to the object at ffff88800d5921d0 [ 38.904554] which belongs to the cache vm_area_struct of size 168 [ 38.906023] The buggy address is located 88 bytes inside of [ 38.906023] freed 168-byte region [ffff88800d5921d0, ffff88800d592278) [ 38.907421] [ 38.907655] The buggy address belongs to the physical page: [ 38.908322] page:00000000bcd31aa8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd592 [ 38.909401] memcg:ffff88800e417f01 [ 38.909831] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.910476] page_type: 0xffffffff() [ 38.910927] raw: 0100000000000200 ffff8880087a0c80 ffffea000037bfc0 dead000000000002 [ 38.911855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e417f01 [ 38.912754] page dumped because: kasan: bad access detected [ 38.913416] [ 38.913633] Memory state around the buggy address: [ 38.914216] ffff88800d592100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.915074] ffff88800d592180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.915947] >ffff88800d592200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.916822] ^ [ 38.917377] ffff88800d592280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.918239] ffff88800d592300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.919088] ================================================================== [ 38.920055] Disabling lock debugging due to kernel taint [ 40.919937] BUG: Bad rss-counter state mm:000000005e0b1dac type:MM_FILEPAGES val:33 [ 40.921110] BUG: Bad rss-counter state mm:000000005e0b1dac type:MM_ANONPAGES val:22 [ 41.394900] BUG: Bad rss-counter state mm:000000008a2c5896 type:MM_FILEPAGES val:33 [ 41.395827] BUG: Bad rss-counter state mm:000000008a2c5896 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53787' (ECDSA) to the list of known hosts. 2023/06/20 21:02:03 fuzzer started 2023/06/20 21:02:03 dialing manager at localhost:36067 2023/06/20 21:02:03 checking machine... 2023/06/20 21:02:03 checking revisions... [ 42.130730] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:02:03 testing simple program... [ 42.185189] cgroup: Unknown subsys name 'net' [ 42.222568] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880192a8680 RCX=0000000000000000 RDX=ffff888014691b40 RSI=ffffffff83632551 RDI=ffff8880192a8708 RBP=0000000000000010 RSP=ffff888016777df0 R8 =0000000000000000 R9 =ffffed10032550e1 R10=ffff8880192a870b R11=00000000000b6a61 R12=ffff8880192a85c0 R13=0000000000000000 R14=1ffff11002ceefd1 R15=0000000000000000 RIP=ffffffff818d8a14 RFL=00000293 [--S-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 00007fa630119900 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=00007fa6306d0618 CR3=000000000dffc000 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=0000000000000010 RBX=0000000000000005 RCX=00007ffeb9fb82a0 RDX=00000000ffffffff RSI=00007ffeb9fb8510 RDI=00007ffeb9fb8450 RBP=0000000000000005 RSP=00007ffeb9fb8160 R8 =0000000000000000 R9 =0000000000000010 R10=0000000000000002 R11=0000000000656434 R12=00007ffeb9fb8450 R13=00007ffeb9fb8510 R14=0000000000000000 R15=00007ffeb9fb82b0 RIP=00007fa80eca57b6 RFL=00000202 [-------] 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 00007fa80e49d900 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=00007fa80d8a2be0 CR3=0000000009a5c000 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=f74884dbcdb83b2500000000000ae988 XMM01=d3fdd5f48436fbd700000000000aead0 XMM02=ac585006bc0bee6f00000000000f7d18 XMM03=eff9b2d0a8fce9cb000000000011b3b8 XMM04=e54979e9a80b299c000000000011b540 XMM05=ec2efd57dc4c00df000000000011b470 XMM06=2fccd54c36d8a3f300000000000fa440 XMM07=693bd129e125714a00000000000f7b20 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000