syzkaller login: [ 32.668120] BUG: Bad rss-counter state mm:00000000cf2f5908 type:MM_FILEPAGES val:33 [ 32.669169] BUG: Bad rss-counter state mm:00000000cf2f5908 type:MM_ANONPAGES val:22 [ 32.830377] ================================================================== [ 32.831493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.832464] Read of size 8 at addr ffff88800dfae798 by task sshd/220 [ 32.833308] [ 32.833526] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.834395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.835405] Call Trace: [ 32.835724] [ 32.836009] dump_stack_lvl+0x91/0xf0 [ 32.836497] print_report+0xcc/0x620 [ 32.836980] ? __virt_addr_valid+0x102/0x340 [ 32.837546] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.838160] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.838802] kasan_report+0xbe/0xf0 [ 32.839291] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.839926] vma_interval_tree_remove+0xc75/0xec0 [ 32.840542] vma_prepare+0xc54/0x11a0 [ 32.841020] __split_vma+0x5af/0x950 [ 32.841495] ? __pfx___split_vma+0x10/0x10 [ 32.842034] ? find_held_lock+0x2c/0x110 [ 32.842564] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.843152] ? lock_is_held_type+0x9f/0x120 [ 32.843695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.844298] ? mtree_range_walk+0x632/0x900 [ 32.844851] ? mas_walk+0x5c7/0x7c0 [ 32.845328] do_vmi_munmap+0x1f1/0x2b0 [ 32.845821] mmap_region+0x1f9/0x2660 [ 32.846305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.846833] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.847549] ? __pfx_lock_acquire+0x10/0x10 [ 32.848094] ? __pfx_mmap_region+0x10/0x10 [ 32.848634] ? security_mmap_addr+0x7d/0xa0 [ 32.849170] ? get_unmapped_area+0x1f5/0x3f0 [ 32.849726] do_mmap+0x854/0xf00 [ 32.850173] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.850694] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.851255] ksys_mmap_pgoff+0x3af/0x500 [ 32.851767] do_syscall_64+0x3f/0x90 [ 32.852260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.852917] RIP: 0033:0x7fdb40b8ad82 [ 32.853383] 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 [ 32.855553] RSP: 002b:00007ffea1a6e758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.856468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb40b8ad82 [ 32.857322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb3ffc4000 [ 32.858169] RBP: 00007fdb3ffc4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.859027] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fbad2fbec0 [ 32.859885] R13: 00007ffea1a6e770 R14: 00007ffea1a6e7a0 R15: 00007ffea1a6eb00 [ 32.860741] [ 32.861033] [ 32.861247] Allocated by task 213: [ 32.861675] kasan_save_stack+0x22/0x50 [ 32.862176] kasan_set_track+0x25/0x30 [ 32.862678] __kasan_slab_alloc+0x59/0x70 [ 32.863201] kmem_cache_alloc+0x16b/0x370 [ 32.863725] vm_area_dup+0x20/0x160 [ 32.864185] __split_vma+0x170/0x950 [ 32.864654] split_vma+0xc6/0x110 [ 32.865094] mprotect_fixup+0x8d2/0xb30 [ 32.865600] do_mprotect_pkey+0x87e/0xd40 [ 32.866116] __x64_sys_mprotect+0x78/0xc0 [ 32.866655] do_syscall_64+0x3f/0x90 [ 32.867153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.867795] [ 32.868013] Freed by task 210: [ 32.868417] kasan_save_stack+0x22/0x50 [ 32.868926] kasan_set_track+0x25/0x30 [ 32.869422] kasan_save_free_info+0x2b/0x50 [ 32.869963] __kasan_slab_free+0x10a/0x190 [ 32.870501] kmem_cache_free+0x10d/0x4d0 [ 32.871018] rcu_core+0x8c8/0x2860 [ 32.871462] __do_softirq+0x1b7/0x7d4 [ 32.871943] [ 32.872158] Last potentially related work creation: [ 32.872748] kasan_save_stack+0x22/0x50 [ 32.873258] __kasan_record_aux_stack+0x8e/0xa0 [ 32.873832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.874478] remove_vma+0x139/0x170 [ 32.874949] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.875511] do_vmi_munmap+0x1f1/0x2b0 [ 32.876004] __vm_munmap+0x138/0x3a0 [ 32.876478] __x64_sys_munmap+0x59/0x80 [ 32.876983] do_syscall_64+0x3f/0x90 [ 32.877463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.878123] [ 32.878337] Second to last potentially related work creation: [ 32.879042] kasan_save_stack+0x22/0x50 [ 32.879545] __kasan_record_aux_stack+0x8e/0xa0 [ 32.880125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.880774] remove_vma+0x139/0x170 [ 32.881229] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.881792] do_vmi_munmap+0x1f1/0x2b0 [ 32.882279] mmap_region+0x1f9/0x2660 [ 32.882779] do_mmap+0x854/0xf00 [ 32.883215] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.883708] ksys_mmap_pgoff+0x3af/0x500 [ 32.884211] do_syscall_64+0x3f/0x90 [ 32.884693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.885334] [ 32.885550] The buggy address belongs to the object at ffff88800dfae740 [ 32.885550] which belongs to the cache vm_area_struct of size 168 [ 32.887042] The buggy address is located 88 bytes inside of [ 32.887042] freed 168-byte region [ffff88800dfae740, ffff88800dfae7e8) [ 32.888459] [ 32.888676] The buggy address belongs to the physical page: [ 32.889343] page:00000000a79b3001 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfae [ 32.890440] memcg:ffff88800973c501 [ 32.890888] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.891591] page_type: 0xffffffff() [ 32.892050] raw: 0100000000000200 ffff88800879fc80 ffffea0000369f80 dead000000000005 [ 32.892963] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800973c501 [ 32.893872] page dumped because: kasan: bad access detected [ 32.894537] [ 32.894769] Memory state around the buggy address: [ 32.895356] ffff88800dfae680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.896218] ffff88800dfae700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.897072] >ffff88800dfae780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.897934] ^ [ 32.898433] ffff88800dfae800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.899298] ffff88800dfae880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.900154] ================================================================== [ 32.901199] Disabling lock debugging due to kernel taint [ 35.153271] BUG: Bad rss-counter state mm:000000006337274b type:MM_FILEPAGES val:33 [ 35.154460] BUG: Bad rss-counter state mm:000000006337274b type:MM_ANONPAGES val:22 [ 35.542809] BUG: Bad rss-counter state mm:00000000f8172453 type:MM_FILEPAGES val:33 [ 35.543811] BUG: Bad rss-counter state mm:00000000f8172453 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14084' (ECDSA) to the list of known hosts. 2023/06/19 19:41:40 fuzzer started 2023/06/19 19:41:40 dialing manager at localhost:44161 2023/06/19 19:41:40 checking machine... 2023/06/19 19:41:40 checking revisions... [ 36.278470] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:41:41 testing simple program... [ 36.332559] cgroup: Unknown subsys name 'net' [ 36.385517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000033 RCX=dffffc0000000000 RDX=ffff888016bfb680 RSI=ffffffff8372635c RDI=0000000000000005 RBP=0000000000000034 RSP=ffff8880162ff7c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c78 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83726387 RFL=00000246 [---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 00007f4ab2459900 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=00007f4ab2a10618 CR3=000000000d538000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f9278f116c0 CR3=000000000d856000 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=dbe6a581a2fdf086b8413bfbe9011e34 XMM02=ec2efd57dc4c00df000000000011fce8 XMM03=ec3844d27b1e5f15000000000011fdb8 XMM04=cb704a57872a857e00000000000ae988 XMM05=19e9129bd510f23500000000001353a0 XMM06=4fda316b135da52b0000000000135228 XMM07=e042d86d42eb936e00000000001244a8 XMM08=ec3844d27b1e5f15000000000011fdb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000