syzkaller login: [ 28.938315] BUG: Bad rss-counter state mm:00000000cf084fb9 type:MM_FILEPAGES val:33 [ 28.939506] BUG: Bad rss-counter state mm:00000000cf084fb9 type:MM_ANONPAGES val:22 [ 28.978260] ================================================================== [ 28.979143] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.980075] Read of size 8 at addr ffff88800e385b38 by task sshd/220 [ 28.980908] [ 28.981123] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.981984] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.982965] Call Trace: [ 28.983290] [ 28.983574] dump_stack_lvl+0x91/0xf0 [ 28.984059] print_report+0xcc/0x620 [ 28.984549] ? __virt_addr_valid+0x102/0x340 [ 28.985112] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.985722] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.986351] kasan_report+0xbe/0xf0 [ 28.986825] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.987458] vma_interval_tree_remove+0xc75/0xec0 [ 28.988090] vma_prepare+0xc54/0x11a0 [ 28.988611] __split_vma+0x5af/0x950 [ 28.989170] ? __pfx___split_vma+0x10/0x10 [ 28.989715] ? find_held_lock+0x2c/0x110 [ 28.990251] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.990838] ? lock_is_held_type+0x9f/0x120 [ 28.991417] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.992051] ? mtree_range_walk+0x632/0x900 [ 28.992626] ? mas_walk+0x5c7/0x7c0 [ 28.993117] do_vmi_munmap+0x1f1/0x2b0 [ 28.993627] mmap_region+0x1f9/0x2660 [ 28.994128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.994657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.995405] ? __pfx_lock_acquire+0x10/0x10 [ 28.995959] ? __pfx_mmap_region+0x10/0x10 [ 28.996529] ? security_mmap_addr+0x7d/0xa0 [ 28.997080] ? get_unmapped_area+0x1f5/0x3f0 [ 28.997657] do_mmap+0x854/0xf00 [ 28.998114] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.998629] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.999208] ksys_mmap_pgoff+0x3af/0x500 [ 28.999756] do_syscall_64+0x3f/0x90 [ 29.000254] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.000912] RIP: 0033:0x7f87cd67ed82 [ 29.001377] 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 [ 29.003534] RSP: 002b:00007ffc03072838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.004450] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f87cd67ed82 [ 29.005305] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f87ccab8000 [ 29.006155] RBP: 00007f87ccab8000 R08: 0000000000000009 R09: 0000000000001000 [ 29.006997] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3fa15df70 [ 29.007843] R13: 00007ffc03072850 R14: 00007ffc03072880 R15: 00007ffc03072be0 [ 29.008716] [ 29.009009] [ 29.009227] Allocated by task 212: [ 29.009656] kasan_save_stack+0x22/0x50 [ 29.010159] kasan_set_track+0x25/0x30 [ 29.010651] __kasan_slab_alloc+0x59/0x70 [ 29.011173] kmem_cache_alloc+0x16b/0x370 [ 29.011690] vm_area_dup+0x20/0x160 [ 29.012142] __split_vma+0x170/0x950 [ 29.012619] split_vma+0xc6/0x110 [ 29.013060] mprotect_fixup+0x8d2/0xb30 [ 29.013564] do_mprotect_pkey+0x87e/0xd40 [ 29.014096] __x64_sys_mprotect+0x78/0xc0 [ 29.014615] do_syscall_64+0x3f/0x90 [ 29.015083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.015725] [ 29.015944] Freed by task 212: [ 29.016332] kasan_save_stack+0x22/0x50 [ 29.016850] kasan_set_track+0x25/0x30 [ 29.017346] kasan_save_free_info+0x2b/0x50 [ 29.017884] __kasan_slab_free+0x10a/0x190 [ 29.018415] kmem_cache_free+0x10d/0x4d0 [ 29.018923] rcu_core+0x8c8/0x2860 [ 29.019369] __do_softirq+0x1b7/0x7d4 [ 29.019844] [ 29.020064] Last potentially related work creation: [ 29.020657] kasan_save_stack+0x22/0x50 [ 29.021158] __kasan_record_aux_stack+0x8e/0xa0 [ 29.021730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.022369] remove_vma+0x139/0x170 [ 29.022817] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.023377] do_vmi_munmap+0x1f1/0x2b0 [ 29.023860] __vm_munmap+0x138/0x3a0 [ 29.024323] __x64_sys_munmap+0x59/0x80 [ 29.024830] do_syscall_64+0x3f/0x90 [ 29.025300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.025941] [ 29.026160] Second to last potentially related work creation: [ 29.026841] kasan_save_stack+0x22/0x50 [ 29.027350] __kasan_record_aux_stack+0x8e/0xa0 [ 29.027922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.028583] remove_vma+0x139/0x170 [ 29.029041] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.029604] do_vmi_munmap+0x1f1/0x2b0 [ 29.030093] mmap_region+0x1f9/0x2660 [ 29.030570] do_mmap+0x854/0xf00 [ 29.031009] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.031504] ksys_mmap_pgoff+0x3af/0x500 [ 29.032009] do_syscall_64+0x3f/0x90 [ 29.032490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.033135] [ 29.033351] The buggy address belongs to the object at ffff88800e385ae0 [ 29.033351] which belongs to the cache vm_area_struct of size 168 [ 29.034823] The buggy address is located 88 bytes inside of [ 29.034823] freed 168-byte region [ffff88800e385ae0, ffff88800e385b88) [ 29.036228] [ 29.036458] The buggy address belongs to the physical page: [ 29.037119] page:000000000de9b957 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe385 [ 29.038206] memcg:ffff88800e2d5101 [ 29.038635] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.039285] page_type: 0xffffffff() [ 29.039748] raw: 0100000000000200 ffff88800879fc80 ffffea000031d6c0 dead000000000002 [ 29.040668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2d5101 [ 29.041569] page dumped because: kasan: bad access detected [ 29.042229] [ 29.042446] Memory state around the buggy address: [ 29.043034] ffff88800e385a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.043885] ffff88800e385a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 29.044763] >ffff88800e385b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.045617] ^ [ 29.046239] ffff88800e385b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.047102] ffff88800e385c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.047989] ================================================================== [ 29.049100] Disabling lock debugging due to kernel taint [ 30.947863] BUG: Bad rss-counter state mm:000000005bf86676 type:MM_FILEPAGES val:33 [ 30.949060] BUG: Bad rss-counter state mm:000000005bf86676 type:MM_ANONPAGES val:22 [ 31.469513] BUG: Bad rss-counter state mm:000000008179d7bb type:MM_FILEPAGES val:33 [ 31.470733] BUG: Bad rss-counter state mm:000000008179d7bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21647' (ECDSA) to the list of known hosts. 2023/06/19 23:37:19 fuzzer started 2023/06/19 23:37:19 dialing manager at localhost:44161 2023/06/19 23:37:19 checking machine... 2023/06/19 23:37:19 checking revisions... [ 32.061681] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:37:19 testing simple program... [ 32.095723] cgroup: Unknown subsys name 'net' [ 32.131926] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:37:19 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ff990866190 CR3=000000000c65e000 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=2039313a37333a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a37333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf3de00 RBX=00000000000928c0 RCX=0000000000000000 RDX=1ffffffff0ad9d74 RSI=00000000000000f0 RDI=0000000000fc3001 RBP=ffff88801c61f628 RSP=ffff88801c61f5e0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffed1001f2d000 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000000 R15=ffffffff818470dc RIP=ffffffff81807e24 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 00007fc0226cd900 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=00007fc022c84618 CR3=000000000dc88000 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