syzkaller login: [ 30.621627] BUG: Bad rss-counter state mm:0000000052b44873 type:MM_FILEPAGES val:33 [ 30.622911] BUG: Bad rss-counter state mm:0000000052b44873 type:MM_ANONPAGES val:22 [ 30.765133] ================================================================== [ 30.766063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.767015] Read of size 8 at addr ffff88800e1bc798 by task sshd/222 [ 30.767814] [ 30.768032] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.769030] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.770044] Call Trace: [ 30.770370] [ 30.770659] dump_stack_lvl+0x91/0xf0 [ 30.771156] print_report+0xcc/0x620 [ 30.771656] ? __virt_addr_valid+0x102/0x340 [ 30.772209] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.772849] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773467] kasan_report+0xbe/0xf0 [ 30.773963] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.774588] vma_interval_tree_remove+0xc75/0xec0 [ 30.775198] vma_prepare+0xc54/0x11a0 [ 30.775693] __split_vma+0x5af/0x950 [ 30.776164] ? __pfx___split_vma+0x10/0x10 [ 30.776691] ? find_held_lock+0x2c/0x110 [ 30.777222] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.777815] ? lock_is_held_type+0x9f/0x120 [ 30.778372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.778993] ? mtree_range_walk+0x632/0x900 [ 30.779553] ? mas_walk+0x5c7/0x7c0 [ 30.780042] do_vmi_munmap+0x1f1/0x2b0 [ 30.780538] mmap_region+0x1f9/0x2660 [ 30.781034] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.781568] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.782308] ? __pfx_lock_acquire+0x10/0x10 [ 30.782856] ? __pfx_mmap_region+0x10/0x10 [ 30.783396] ? security_mmap_addr+0x7d/0xa0 [ 30.783935] ? get_unmapped_area+0x1f5/0x3f0 [ 30.784498] do_mmap+0x854/0xf00 [ 30.784945] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.786023] ksys_mmap_pgoff+0x3af/0x500 [ 30.786535] do_syscall_64+0x3f/0x90 [ 30.787020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787672] RIP: 0033:0x7f1f63ebad82 [ 30.788132] 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 [ 30.790307] RSP: 002b:00007ffe97dd6358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.791231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f63ebad82 [ 30.792108] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f632f4000 [ 30.792986] RBP: 00007f1f632f4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.793859] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e57291bec0 [ 30.794724] R13: 00007ffe97dd6370 R14: 00007ffe97dd63a0 R15: 00007ffe97dd6700 [ 30.795602] [ 30.795902] [ 30.796120] Allocated by task 215: [ 30.796557] kasan_save_stack+0x22/0x50 [ 30.797073] kasan_set_track+0x25/0x30 [ 30.797576] __kasan_slab_alloc+0x59/0x70 [ 30.798160] kmem_cache_alloc+0x16b/0x370 [ 30.798682] vm_area_dup+0x20/0x160 [ 30.799146] __split_vma+0x170/0x950 [ 30.799620] split_vma+0xc6/0x110 [ 30.800071] mprotect_fixup+0x8d2/0xb30 [ 30.800589] do_mprotect_pkey+0x87e/0xd40 [ 30.801110] __x64_sys_mprotect+0x78/0xc0 [ 30.801637] do_syscall_64+0x3f/0x90 [ 30.802125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.802777] [ 30.802997] Freed by task 215: [ 30.803395] kasan_save_stack+0x22/0x50 [ 30.803913] kasan_set_track+0x25/0x30 [ 30.804416] kasan_save_free_info+0x2b/0x50 [ 30.804964] __kasan_slab_free+0x10a/0x190 [ 30.805501] kmem_cache_free+0x10d/0x4d0 [ 30.806024] rcu_core+0x8c8/0x2860 [ 30.806479] __do_softirq+0x1b7/0x7d4 [ 30.806958] [ 30.807178] Last potentially related work creation: [ 30.807770] kasan_save_stack+0x22/0x50 [ 30.808277] __kasan_record_aux_stack+0x8e/0xa0 [ 30.808853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.809510] remove_vma+0x139/0x170 [ 30.809984] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.810546] do_vmi_munmap+0x1f1/0x2b0 [ 30.811038] __vm_munmap+0x138/0x3a0 [ 30.811513] __x64_sys_munmap+0x59/0x80 [ 30.812020] do_syscall_64+0x3f/0x90 [ 30.812497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813148] [ 30.813361] The buggy address belongs to the object at ffff88800e1bc740 [ 30.813361] which belongs to the cache vm_area_struct of size 168 [ 30.814839] The buggy address is located 88 bytes inside of [ 30.814839] freed 168-byte region [ffff88800e1bc740, ffff88800e1bc7e8) [ 30.816261] [ 30.816482] The buggy address belongs to the physical page: [ 30.817140] page:00000000cde810a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1bc [ 30.818238] memcg:ffff88800ebbdc01 [ 30.818664] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.819321] page_type: 0xffffffff() [ 30.819809] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.820735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebbdc01 [ 30.821644] page dumped because: kasan: bad access detected [ 30.822325] [ 30.822537] Memory state around the buggy address: [ 30.823121] ffff88800e1bc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.823967] ffff88800e1bc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.824823] >ffff88800e1bc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.825663] ^ [ 30.826173] ffff88800e1bc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.827032] ffff88800e1bc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.827885] ================================================================== [ 30.829121] Disabling lock debugging due to kernel taint [ 33.022600] BUG: Bad rss-counter state mm:0000000030998757 type:MM_FILEPAGES val:33 [ 33.023597] BUG: Bad rss-counter state mm:0000000030998757 type:MM_ANONPAGES val:22 [ 33.496684] BUG: Bad rss-counter state mm:00000000c66a2d60 type:MM_FILEPAGES val:33 [ 33.497716] BUG: Bad rss-counter state mm:00000000c66a2d60 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36483' (ECDSA) to the list of known hosts. 2023/06/20 11:35:15 fuzzer started 2023/06/20 11:35:16 dialing manager at localhost:36067 2023/06/20 11:35:16 checking machine... 2023/06/20 11:35:16 checking revisions... [ 34.232883] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:35:16 testing simple program... [ 34.285135] cgroup: Unknown subsys name 'net' [ 34.321477] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:35:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f12471d5650 CR3=000000000e600000 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=35333a3131203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732035313a3533 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343931 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=0000000000000009 RBX=000000000000000a RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84537d61 RBP=ffffffff8540a108 RSP=ffff88806cf09f80 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000001 R12=0000000000000100 R13=0000000000000009 R14=0000000000000200 R15=0000000000000009 RIP=ffffffff84537e4c RFL=00000202 [-------] 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 00007f1246c20900 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=00007f12471d7618 CR3=0000000019cf8000 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