syzkaller login: [ 31.129420] BUG: Bad rss-counter state mm:000000008d3e5744 type:MM_FILEPAGES val:33 [ 31.130898] BUG: Bad rss-counter state mm:000000008d3e5744 type:MM_ANONPAGES val:22 [ 31.295023] ================================================================== [ 31.295934] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.296871] Read of size 8 at addr ffff88800dd92a50 by task sshd/221 [ 31.297645] [ 31.297864] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.298918] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.299888] Call Trace: [ 31.300213] [ 31.300499] dump_stack_lvl+0x91/0xf0 [ 31.300994] print_report+0xcc/0x620 [ 31.301482] ? __virt_addr_valid+0x102/0x340 [ 31.302036] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.302681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.303299] kasan_report+0xbe/0xf0 [ 31.303774] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.304399] vma_interval_tree_remove+0xc75/0xec0 [ 31.305004] vma_prepare+0xc54/0x11a0 [ 31.305495] __split_vma+0x5af/0x950 [ 31.305980] ? __pfx___split_vma+0x10/0x10 [ 31.306528] ? find_held_lock+0x2c/0x110 [ 31.307062] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.307656] ? lock_is_held_type+0x9f/0x120 [ 31.308210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.308812] ? mtree_range_walk+0x632/0x900 [ 31.309375] ? mas_walk+0x5c7/0x7c0 [ 31.309847] do_vmi_munmap+0x1f1/0x2b0 [ 31.310362] mmap_region+0x1f9/0x2660 [ 31.310867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.311380] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.312101] ? __pfx_lock_acquire+0x10/0x10 [ 31.312656] ? __pfx_mmap_region+0x10/0x10 [ 31.313194] ? security_mmap_addr+0x7d/0xa0 [ 31.313729] ? get_unmapped_area+0x1f5/0x3f0 [ 31.314297] do_mmap+0x854/0xf00 [ 31.314742] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.315250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.315818] ksys_mmap_pgoff+0x3af/0x500 [ 31.316341] do_syscall_64+0x3f/0x90 [ 31.316836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.317491] RIP: 0033:0x7f339b6c9d82 [ 31.317953] 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 [ 31.320149] RSP: 002b:00007ffdd3a52648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.321074] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f339b6c9d82 [ 31.321920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f339ab03000 [ 31.322816] RBP: 00007f339ab03000 R08: 0000000000000009 R09: 0000000000001000 [ 31.323674] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc4bc3bec0 [ 31.324530] R13: 00007ffdd3a52660 R14: 00007ffdd3a52690 R15: 00007ffdd3a529f0 [ 31.325396] [ 31.325691] [ 31.325910] Allocated by task 214: [ 31.326346] kasan_save_stack+0x22/0x50 [ 31.326849] kasan_set_track+0x25/0x30 [ 31.327346] __kasan_slab_alloc+0x59/0x70 [ 31.327874] kmem_cache_alloc+0x16b/0x370 [ 31.328391] vm_area_dup+0x20/0x160 [ 31.328849] __split_vma+0x170/0x950 [ 31.329320] split_vma+0xc6/0x110 [ 31.329754] mprotect_fixup+0x8d2/0xb30 [ 31.330272] do_mprotect_pkey+0x87e/0xd40 [ 31.330795] __x64_sys_mprotect+0x78/0xc0 [ 31.331313] do_syscall_64+0x3f/0x90 [ 31.331789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.332440] [ 31.332656] Freed by task 214: [ 31.333050] kasan_save_stack+0x22/0x50 [ 31.333555] kasan_set_track+0x25/0x30 [ 31.334051] kasan_save_free_info+0x2b/0x50 [ 31.334603] __kasan_slab_free+0x10a/0x190 [ 31.335138] kmem_cache_free+0x10d/0x4d0 [ 31.335654] rcu_core+0x8c8/0x2860 [ 31.336105] __do_softirq+0x1b7/0x7d4 [ 31.336585] [ 31.336797] Last potentially related work creation: [ 31.337390] kasan_save_stack+0x22/0x50 [ 31.337901] __kasan_record_aux_stack+0x8e/0xa0 [ 31.338476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.339112] remove_vma+0x139/0x170 [ 31.339563] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.340202] do_vmi_munmap+0x1f1/0x2b0 [ 31.340685] __vm_munmap+0x138/0x3a0 [ 31.341148] __x64_sys_munmap+0x59/0x80 [ 31.341650] do_syscall_64+0x3f/0x90 [ 31.342129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342804] [ 31.343020] The buggy address belongs to the object at ffff88800dd929f8 [ 31.343020] which belongs to the cache vm_area_struct of size 168 [ 31.344489] The buggy address is located 88 bytes inside of [ 31.344489] freed 168-byte region [ffff88800dd929f8, ffff88800dd92aa0) [ 31.345886] [ 31.346099] The buggy address belongs to the physical page: [ 31.346771] page:0000000043b62066 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd92 [ 31.347861] memcg:ffff88800e1b5c01 [ 31.348285] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.348939] page_type: 0xffffffff() [ 31.349398] raw: 0100000000000200 ffff8880087a0c80 ffffea0000375ac0 dead000000000006 [ 31.350333] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1b5c01 [ 31.351238] page dumped because: kasan: bad access detected [ 31.351898] [ 31.352117] Memory state around the buggy address: [ 31.352702] ffff88800dd92900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.353558] ffff88800dd92980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.354437] >ffff88800dd92a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.355288] ^ [ 31.355988] ffff88800dd92a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.356843] ffff88800dd92b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.357693] ================================================================== [ 31.358635] Disabling lock debugging due to kernel taint [ 33.368765] BUG: Bad rss-counter state mm:000000005b31a28b type:MM_FILEPAGES val:33 [ 33.369694] BUG: Bad rss-counter state mm:000000005b31a28b type:MM_ANONPAGES val:22 [ 33.855776] BUG: Bad rss-counter state mm:000000002fecdf23 type:MM_FILEPAGES val:33 [ 33.857055] BUG: Bad rss-counter state mm:000000002fecdf23 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57522' (ECDSA) to the list of known hosts. 2023/06/21 03:45:51 fuzzer started 2023/06/21 03:45:51 dialing manager at localhost:36067 2023/06/21 03:45:51 checking machine... 2023/06/21 03:45:51 checking revisions... [ 34.509982] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:45:51 testing simple program... [ 34.565147] cgroup: Unknown subsys name 'net' [ 34.627998] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:45:51 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=0000000000000001 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=00007ffd24148b78 CR3=0000000005482000 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=00007f00badf85100000558393de5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880188feb40 RBX=ffff888019ba58b8 RCX=1ffff110013120d2 RDX=dffffc0000000000 RSI=ffff88801890c280 RDI=ffff888019ba58e8 RBP=ffff888009890660 RSP=ffff888018acfa38 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801890c000 R13=0000000000000000 R14=ffff88800d1679c8 R15=ffff88800d167980 RIP=ffffffff81847688 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 00007fd42896e900 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=00007fd428f25618 CR3=000000000edce000 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