syzkaller login: [ 24.123907] BUG: Bad rss-counter state mm:000000001a9e3df1 type:MM_FILEPAGES val:33 [ 24.125421] BUG: Bad rss-counter state mm:000000001a9e3df1 type:MM_ANONPAGES val:22 [ 24.260606] ================================================================== [ 24.261753] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.263138] Read of size 8 at addr ffff88800edd2d08 by task sshd/221 [ 24.264075] [ 24.264315] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.265281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.266358] Call Trace: [ 24.266714] [ 24.267028] dump_stack_lvl+0x91/0xf0 [ 24.267592] print_report+0xcc/0x620 [ 24.268130] ? __virt_addr_valid+0x102/0x340 [ 24.268737] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.269420] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.270073] kasan_report+0xbe/0xf0 [ 24.270547] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.271168] vma_interval_tree_remove+0xc75/0xec0 [ 24.271770] vma_prepare+0xc54/0x11a0 [ 24.272247] __split_vma+0x5af/0x950 [ 24.272715] ? __pfx___split_vma+0x10/0x10 [ 24.273239] ? find_held_lock+0x2c/0x110 [ 24.273755] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.274322] ? lock_is_held_type+0x9f/0x120 [ 24.274857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.275479] ? mtree_range_walk+0x632/0x900 [ 24.276040] ? mas_walk+0x5c7/0x7c0 [ 24.276517] do_vmi_munmap+0x1f1/0x2b0 [ 24.277010] mmap_region+0x1f9/0x2660 [ 24.277490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.277999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.278703] ? __pfx_lock_acquire+0x10/0x10 [ 24.279243] ? __pfx_mmap_region+0x10/0x10 [ 24.279773] ? security_mmap_addr+0x7d/0xa0 [ 24.280300] ? get_unmapped_area+0x1f5/0x3f0 [ 24.280843] do_mmap+0x854/0xf00 [ 24.281282] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.281773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.282331] ksys_mmap_pgoff+0x3af/0x500 [ 24.282832] do_syscall_64+0x3f/0x90 [ 24.283310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.283959] RIP: 0033:0x7f76eab21d82 [ 24.284414] 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 [ 24.286532] RSP: 002b:00007ffd75960c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.287450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76eab21d82 [ 24.288294] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76e9f5b000 [ 24.289139] RBP: 00007f76e9f5b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.289979] R10: 0000000000000812 R11: 0000000000000206 R12: 000056019fa1ed90 [ 24.290823] R13: 00007ffd75960c50 R14: 00007ffd75960c80 R15: 00007ffd75960fe0 [ 24.291684] [ 24.291976] [ 24.292189] Allocated by task 214: [ 24.292613] kasan_save_stack+0x22/0x50 [ 24.293116] kasan_set_track+0x25/0x30 [ 24.293606] __kasan_slab_alloc+0x59/0x70 [ 24.294126] kmem_cache_alloc+0x16b/0x370 [ 24.294638] vm_area_dup+0x20/0x160 [ 24.295095] __split_vma+0x170/0x950 [ 24.295555] split_vma+0xc6/0x110 [ 24.295992] mprotect_fixup+0x8d2/0xb30 [ 24.296492] do_mprotect_pkey+0x87e/0xd40 [ 24.297013] __x64_sys_mprotect+0x78/0xc0 [ 24.297529] do_syscall_64+0x3f/0x90 [ 24.298002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.298642] [ 24.298857] Freed by task 214: [ 24.299268] kasan_save_stack+0x22/0x50 [ 24.299773] kasan_set_track+0x25/0x30 [ 24.300267] kasan_save_free_info+0x2b/0x50 [ 24.300801] __kasan_slab_free+0x10a/0x190 [ 24.301332] kmem_cache_free+0x10d/0x4d0 [ 24.301841] rcu_core+0x8c8/0x2860 [ 24.302284] __do_softirq+0x1b7/0x7d4 [ 24.302758] [ 24.302972] Last potentially related work creation: [ 24.303557] kasan_save_stack+0x22/0x50 [ 24.304083] __kasan_record_aux_stack+0x8e/0xa0 [ 24.304647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.305287] remove_vma+0x139/0x170 [ 24.305736] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.306294] do_vmi_munmap+0x1f1/0x2b0 [ 24.306772] __vm_munmap+0x138/0x3a0 [ 24.307258] __x64_sys_munmap+0x59/0x80 [ 24.307750] do_syscall_64+0x3f/0x90 [ 24.308219] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.308856] [ 24.309071] Second to last potentially related work creation: [ 24.309748] kasan_save_stack+0x22/0x50 [ 24.310252] __kasan_record_aux_stack+0x8e/0xa0 [ 24.310823] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.311472] remove_vma+0x139/0x170 [ 24.311924] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.312478] do_vmi_munmap+0x1f1/0x2b0 [ 24.312967] mmap_region+0x1f9/0x2660 [ 24.313442] do_mmap+0x854/0xf00 [ 24.313866] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.314350] ksys_mmap_pgoff+0x3af/0x500 [ 24.314843] do_syscall_64+0x3f/0x90 [ 24.315333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.315964] [ 24.316181] The buggy address belongs to the object at ffff88800edd2cb0 [ 24.316181] which belongs to the cache vm_area_struct of size 168 [ 24.317633] The buggy address is located 88 bytes inside of [ 24.317633] freed 168-byte region [ffff88800edd2cb0, ffff88800edd2d58) [ 24.319028] [ 24.319244] The buggy address belongs to the physical page: [ 24.319907] page:00000000484c5f1a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedd2 [ 24.320984] memcg:ffff888016f04b01 [ 24.321406] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.322050] page_type: 0xffffffff() [ 24.322497] raw: 0100000000000200 ffff8880087a0c80 ffffea00006629c0 dead000000000002 [ 24.323432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f04b01 [ 24.324334] page dumped because: kasan: bad access detected [ 24.324995] [ 24.325215] Memory state around the buggy address: [ 24.325792] ffff88800edd2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.326647] ffff88800edd2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.327512] >ffff88800edd2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.328356] ^ [ 24.328796] ffff88800edd2d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.329647] ffff88800edd2e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.330495] ================================================================== [ 24.331436] Disabling lock debugging due to kernel taint [ 26.651618] BUG: Bad rss-counter state mm:00000000bfb5fbc7 type:MM_FILEPAGES val:33 [ 26.652624] BUG: Bad rss-counter state mm:00000000bfb5fbc7 type:MM_ANONPAGES val:22 [ 27.168339] BUG: Bad rss-counter state mm:000000009ce8229c type:MM_FILEPAGES val:33 [ 27.169538] BUG: Bad rss-counter state mm:000000009ce8229c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42557' (ECDSA) to the list of known hosts. 2023/06/20 14:30:09 fuzzer started 2023/06/20 14:30:09 dialing manager at localhost:36067 2023/06/20 14:30:09 checking machine... 2023/06/20 14:30:09 checking revisions... [ 27.864919] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:30:09 testing simple program... [ 27.916535] cgroup: Unknown subsys name 'net' [ 28.007647] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:09 Registers: info registers vcpu 0 RAX=ffff888016c87a60 RBX=0000000000000001 RCX=ffffffff860d8201 RDX=1ffff11002d90f2e RSI=ffffffff8180c6a2 RDI=ffff888016c87928 RBP=ffff888016c87980 RSP=ffff888016c878b8 R8 =ffffffff860d825a R9 =ffff888016c87968 R10=0000000000038001 R11=0000000000010b8d R12=ffff888016c879f0 R13=ffff888016c87970 R14=ffff888016de1b40 R15=ffff888016c87928 RIP=ffffffff81130664 RFL=00000282 [--S----] 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 00007f11f7860900 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=00007f11f7e180b0 CR3=000000000edb8000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c123f0 RBX=0000000000000001 RCX=ffffffff86091f84 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86091f86 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86091f88 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000506a R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888008e07f58 R15=ffff88806cf09a98 RIP=ffffffff811311c7 RFL=00000217 [----APC] 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=00007f8444e44018 CR3=000000000c708000 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=0a97e4099553c7adfa434e8977895caf XMM02=000000000011a9c8ec2efd57dc4c00df XMM03=0000000000121410cd53e55325da2ce7 XMM04=6ea088e41161e57200000000000ae988 XMM05=c7d7d1aa1ea5fe780000000000133780 XMM06=c291bd5c70af25b900000000001324b0 XMM07=e042d86d42eb936e00000000001216e8 XMM08=cd53e55325da2ce7000000000011aa28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000