syzkaller login: [ 30.612774] BUG: Bad rss-counter state mm:0000000090b4335c type:MM_FILEPAGES val:33 [ 30.614309] BUG: Bad rss-counter state mm:0000000090b4335c type:MM_ANONPAGES val:22 [ 30.760203] ================================================================== [ 30.761143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.762085] Read of size 8 at addr ffff88801918db38 by task sshd/220 [ 30.762933] [ 30.763231] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.764097] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.765085] Call Trace: [ 30.765441] [ 30.765732] dump_stack_lvl+0x91/0xf0 [ 30.766222] print_report+0xcc/0x620 [ 30.766707] ? __virt_addr_valid+0x102/0x340 [ 30.767271] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.767897] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.768528] kasan_report+0xbe/0xf0 [ 30.769014] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769654] vma_interval_tree_remove+0xc75/0xec0 [ 30.770253] vma_prepare+0xc54/0x11a0 [ 30.770732] __split_vma+0x5af/0x950 [ 30.771200] ? __pfx___split_vma+0x10/0x10 [ 30.771732] ? find_held_lock+0x2c/0x110 [ 30.772248] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.772821] ? lock_is_held_type+0x9f/0x120 [ 30.773358] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.773972] ? mtree_range_walk+0x632/0x900 [ 30.774520] ? mas_walk+0x5c7/0x7c0 [ 30.774997] do_vmi_munmap+0x1f1/0x2b0 [ 30.775491] mmap_region+0x1f9/0x2660 [ 30.775974] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.776484] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.777197] ? __pfx_lock_acquire+0x10/0x10 [ 30.777746] ? __pfx_mmap_region+0x10/0x10 [ 30.778271] ? security_mmap_addr+0x7d/0xa0 [ 30.778811] ? get_unmapped_area+0x1f5/0x3f0 [ 30.779360] do_mmap+0x854/0xf00 [ 30.779800] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.780294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.780856] ksys_mmap_pgoff+0x3af/0x500 [ 30.781360] do_syscall_64+0x3f/0x90 [ 30.781859] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782500] RIP: 0033:0x7fe3683c7d82 [ 30.782955] 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 [ 30.785096] RSP: 002b:00007ffd34813d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.786023] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3683c7d82 [ 30.786891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe367801000 [ 30.787747] RBP: 00007fe367801000 R08: 0000000000000009 R09: 0000000000001000 [ 30.788592] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f64572ec0 [ 30.789439] R13: 00007ffd34813d90 R14: 00007ffd34813dc0 R15: 00007ffd34814120 [ 30.790306] [ 30.790610] [ 30.790824] Allocated by task 213: [ 30.791252] kasan_save_stack+0x22/0x50 [ 30.791755] kasan_set_track+0x25/0x30 [ 30.792252] __kasan_slab_alloc+0x59/0x70 [ 30.792780] kmem_cache_alloc+0x16b/0x370 [ 30.793302] vm_area_dup+0x20/0x160 [ 30.793767] __split_vma+0x170/0x950 [ 30.794238] split_vma+0xc6/0x110 [ 30.794685] mprotect_fixup+0x8d2/0xb30 [ 30.795190] do_mprotect_pkey+0x87e/0xd40 [ 30.795709] __x64_sys_mprotect+0x78/0xc0 [ 30.796233] do_syscall_64+0x3f/0x90 [ 30.796707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.797349] [ 30.797583] Freed by task 213: [ 30.797975] kasan_save_stack+0x22/0x50 [ 30.798476] kasan_set_track+0x25/0x30 [ 30.798966] kasan_save_free_info+0x2b/0x50 [ 30.799495] __kasan_slab_free+0x10a/0x190 [ 30.800035] kmem_cache_free+0x10d/0x4d0 [ 30.800551] rcu_core+0x8c8/0x2860 [ 30.800996] __do_softirq+0x1b7/0x7d4 [ 30.801476] [ 30.801694] Last potentially related work creation: [ 30.802275] kasan_save_stack+0x22/0x50 [ 30.802781] __kasan_record_aux_stack+0x8e/0xa0 [ 30.803353] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.803999] remove_vma+0x139/0x170 [ 30.804445] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.804996] do_vmi_munmap+0x1f1/0x2b0 [ 30.805490] __vm_munmap+0x138/0x3a0 [ 30.805954] __x64_sys_munmap+0x59/0x80 [ 30.806446] do_syscall_64+0x3f/0x90 [ 30.806916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807554] [ 30.807768] The buggy address belongs to the object at ffff88801918dae0 [ 30.807768] which belongs to the cache vm_area_struct of size 168 [ 30.809235] The buggy address is located 88 bytes inside of [ 30.809235] freed 168-byte region [ffff88801918dae0, ffff88801918db88) [ 30.810730] [ 30.810954] The buggy address belongs to the physical page: [ 30.811611] page:000000002a3071ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1918d [ 30.812702] memcg:ffff88800dc7ef01 [ 30.813127] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.813779] page_type: 0xffffffff() [ 30.814226] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.815135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc7ef01 [ 30.816043] page dumped because: kasan: bad access detected [ 30.816701] [ 30.816915] Memory state around the buggy address: [ 30.817508] ffff88801918da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.818368] ffff88801918da80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.819229] >ffff88801918db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.820071] ^ [ 30.820678] ffff88801918db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.821546] ffff88801918dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.822388] ================================================================== [ 30.823545] Disabling lock debugging due to kernel taint [ 32.795613] BUG: Bad rss-counter state mm:000000003e7ae2a5 type:MM_FILEPAGES val:33 [ 32.796772] BUG: Bad rss-counter state mm:000000003e7ae2a5 type:MM_ANONPAGES val:22 [ 33.229910] BUG: Bad rss-counter state mm:000000002f75ef9a type:MM_FILEPAGES val:33 [ 33.231092] BUG: Bad rss-counter state mm:000000002f75ef9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42366' (ECDSA) to the list of known hosts. 2023/06/19 21:10:58 fuzzer started 2023/06/19 21:10:59 dialing manager at localhost:44161 2023/06/19 21:10:59 checking machine... 2023/06/19 21:10:59 checking revisions... [ 33.904487] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:10:59 testing simple program... [ 33.946346] cgroup: Unknown subsys name 'net' [ 33.982378] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:10:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888090374ec0 RCX=ffffffff811430ee RDX=ffff888014173680 RSI=ffff888090374ec0 RDI=ffff888010374ec0 RBP=ffff888010374ec0 RSP=ffff888015aaf840 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=ffff888016b54500 RIP=ffffffff814c02f8 RFL=00000286 [--S--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 00007fc45c274900 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=00007fc45c82b618 CR3=000000000f9c8000 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=563412feff00545000000000000080fe 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=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888008d87b88 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=dffffc0000000000 R15=ffff888008d87bf8 RIP=ffffffff81534226 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 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=00007f6307b7cef0 CR3=000000000ed36000 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=da00affac02ca29b734e027cbbb78d47 XMM02=2c67c8bc2e329bc3000000000011d178 XMM03=fb795ef6d657705600000000001246f0 XMM04=814b49d1204ebf5000000000000ae988 XMM05=19e9129bd510f2350000000000134288 XMM06=244fae13d8469e0000000000001330f0 XMM07=e042d86d42eb936e0000000000124970 XMM08=c7094c474c084f1c000000000011d1d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000