syzkaller login: [ 32.420131] BUG: Bad rss-counter state mm:00000000efde0a96 type:MM_FILEPAGES val:33 [ 32.420999] BUG: Bad rss-counter state mm:00000000efde0a96 type:MM_ANONPAGES val:22 [ 32.604387] ================================================================== [ 32.604983] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.605604] Read of size 8 at addr ffff8880159ff310 by task sshd/220 [ 32.606080] [ 32.606222] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.606803] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.607441] Call Trace: [ 32.607641] [ 32.607819] dump_stack_lvl+0x91/0xf0 [ 32.612219] print_report+0xcc/0x620 [ 32.612533] ? __virt_addr_valid+0x102/0x340 [ 32.612879] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.613273] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.613695] kasan_report+0xbe/0xf0 [ 32.613998] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.614418] vma_interval_tree_remove+0xc75/0xec0 [ 32.614798] vma_prepare+0xc54/0x11a0 [ 32.615100] __split_vma+0x5af/0x950 [ 32.615445] ? __pfx___split_vma+0x10/0x10 [ 32.615781] ? find_held_lock+0x2c/0x110 [ 32.616152] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.620453] ? lock_is_held_type+0x9f/0x120 [ 32.620795] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.621174] ? mtree_range_walk+0x632/0x900 [ 32.621528] ? mas_walk+0x5c7/0x7c0 [ 32.621827] do_vmi_munmap+0x1f1/0x2b0 [ 32.622139] mmap_region+0x1f9/0x2660 [ 32.622467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.622789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.623235] ? __pfx_lock_acquire+0x10/0x10 [ 32.623614] ? __pfx_mmap_region+0x10/0x10 [ 32.623979] ? security_mmap_addr+0x7d/0xa0 [ 32.624331] ? get_unmapped_area+0x1f5/0x3f0 [ 32.624677] do_mmap+0x854/0xf00 [ 32.624954] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.625269] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.625620] ksys_mmap_pgoff+0x3af/0x500 [ 32.625940] do_syscall_64+0x3f/0x90 [ 32.626241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.626657] RIP: 0033:0x7f8208cfbd82 [ 32.626948] 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 [ 32.628314] RSP: 002b:00007ffeada615d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.628891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8208cfbd82 [ 32.629425] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8208135000 [ 32.629953] RBP: 00007f8208135000 R08: 0000000000000009 R09: 0000000000001000 [ 32.630490] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563e9ee4b980 [ 32.631022] R13: 00007ffeada615f0 R14: 00007ffeada61620 R15: 00007ffeada61980 [ 32.631560] [ 32.631744] [ 32.631879] Allocated by task 213: [ 32.632189] kasan_save_stack+0x22/0x50 [ 32.632520] kasan_set_track+0x25/0x30 [ 32.632831] __kasan_slab_alloc+0x59/0x70 [ 32.633162] kmem_cache_alloc+0x16b/0x370 [ 32.633487] vm_area_dup+0x20/0x160 [ 32.633771] __split_vma+0x170/0x950 [ 32.634063] split_vma+0xc6/0x110 [ 32.634343] mprotect_fixup+0x8d2/0xb30 [ 32.634662] do_mprotect_pkey+0x87e/0xd40 [ 32.634991] __x64_sys_mprotect+0x78/0xc0 [ 32.635321] do_syscall_64+0x3f/0x90 [ 32.635619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.636047] [ 32.636183] Freed by task 213: [ 32.636451] kasan_save_stack+0x22/0x50 [ 32.636769] kasan_set_track+0x25/0x30 [ 32.637080] kasan_save_free_info+0x2b/0x50 [ 32.637416] __kasan_slab_free+0x10a/0x190 [ 32.637748] kmem_cache_free+0x10d/0x4d0 [ 32.638067] rcu_core+0x8c8/0x2860 [ 32.638353] __do_softirq+0x1b7/0x7d4 [ 32.638657] [ 32.638794] Last potentially related work creation: [ 32.639163] kasan_save_stack+0x22/0x50 [ 32.639482] __kasan_record_aux_stack+0x8e/0xa0 [ 32.639844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.640307] remove_vma+0x139/0x170 [ 32.640593] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.640944] do_vmi_munmap+0x1f1/0x2b0 [ 32.641247] __vm_munmap+0x138/0x3a0 [ 32.641549] __x64_sys_munmap+0x59/0x80 [ 32.641860] do_syscall_64+0x3f/0x90 [ 32.642159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.642563] [ 32.642697] Second to last potentially related work creation: [ 32.643122] kasan_save_stack+0x22/0x50 [ 32.643446] __kasan_record_aux_stack+0x8e/0xa0 [ 32.643808] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.644251] remove_vma+0x139/0x170 [ 32.644539] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.644887] do_vmi_munmap+0x1f1/0x2b0 [ 32.645191] mmap_region+0x1f9/0x2660 [ 32.645539] do_mmap+0x854/0xf00 [ 32.645811] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.646120] ksys_mmap_pgoff+0x3af/0x500 [ 32.646464] do_syscall_64+0x3f/0x90 [ 32.646759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.647160] [ 32.647294] The buggy address belongs to the object at ffff8880159ff2b8 [ 32.647294] which belongs to the cache vm_area_struct of size 168 [ 32.652267] The buggy address is located 88 bytes inside of [ 32.652267] freed 168-byte region [ffff8880159ff2b8, ffff8880159ff360) [ 32.653155] [ 32.653295] The buggy address belongs to the physical page: [ 32.653708] page:000000002acb4c64 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159ff [ 32.654415] memcg:ffff888019832001 [ 32.654706] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.655148] page_type: 0xffffffff() [ 32.655462] raw: 0100000000000200 ffff88800879fc80 ffffea00005ab1c0 dead000000000005 [ 32.656058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019832001 [ 32.656674] page dumped because: kasan: bad access detected [ 32.657089] [ 32.657225] Memory state around the buggy address: [ 32.657592] ffff8880159ff200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.658127] ffff8880159ff280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.658708] >ffff8880159ff300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.659243] ^ [ 32.659564] ffff8880159ff380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.660128] ffff8880159ff400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.660699] ================================================================== [ 32.661542] Disabling lock debugging due to kernel taint [ 36.424087] BUG: Bad rss-counter state mm:0000000046fc1c3e type:MM_FILEPAGES val:33 [ 36.424773] BUG: Bad rss-counter state mm:0000000046fc1c3e type:MM_ANONPAGES val:22 [ 38.320093] BUG: Bad rss-counter state mm:00000000d1bee2c4 type:MM_FILEPAGES val:33 [ 38.320760] BUG: Bad rss-counter state mm:00000000d1bee2c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26656' (ECDSA) to the list of known hosts. [ 38.470455] systemd-udevd (116) used greatest stack depth: 23768 bytes left 2023/06/20 09:58:02 fuzzer started 2023/06/20 09:58:02 dialing manager at localhost:44161 2023/06/20 09:58:02 checking machine... 2023/06/20 09:58:02 checking revisions... [ 39.199542] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:58:03 testing simple program... [ 39.278647] cgroup: Unknown subsys name 'net' [ 39.359579] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:58:01 Registers: info registers vcpu 0 RAX=ffffc90000660000 RBX=ffff888009f80000 RCX=0000000000000100 RDX=1ffff110013f0208 RSI=ffffffff8301b1cf RDI=000000000000000a RBP=0000000000000080 RSP=ffff88806ce097d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=dffffc0000000000 R13=ffff888008476800 R14=ffff888009f81040 R15=000000000000000a RIP=ffffffff8301b1f7 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 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=00007f5b3974f328 CR3=000000000e30e000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f7aecaf3510 CR3=000000000c6c8000 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=0daea5af67a64a9e174a300bfdcbe01d XMM02=2c67c8bc2e329bc3000000000011f688 XMM03=e042d86d42eb936e0000000000123608 XMM04=4e300d48ce50503a00000000000ae988 XMM05=dbd697ea833c10090000000000135540 XMM06=19e9129bd510f2350000000000134408 XMM07=139997807ff5a4420000000000124d58 XMM08=e1353cc91df538a70000000000124368 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000