syzkaller login: [ 40.734477] BUG: Bad rss-counter state mm:000000001e1e7e83 type:MM_FILEPAGES val:33 [ 40.735894] BUG: Bad rss-counter state mm:000000001e1e7e83 type:MM_ANONPAGES val:22 [ 40.896599] ================================================================== [ 40.897590] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.898590] Read of size 8 at addr ffff88800e066b38 by task sshd/219 [ 40.899516] [ 40.899749] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.900670] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.901737] Call Trace: [ 40.902077] [ 40.902382] dump_stack_lvl+0x91/0xf0 [ 40.902905] print_report+0xcc/0x620 [ 40.903426] ? __virt_addr_valid+0x102/0x340 [ 40.904015] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.904671] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.905329] kasan_report+0xbe/0xf0 [ 40.905849] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.906511] vma_interval_tree_remove+0xc75/0xec0 [ 40.907153] vma_prepare+0xc54/0x11a0 [ 40.907669] __split_vma+0x5af/0x950 [ 40.908172] ? __pfx___split_vma+0x10/0x10 [ 40.908737] ? find_held_lock+0x2c/0x110 [ 40.909292] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.909929] ? lock_is_held_type+0x9f/0x120 [ 40.910501] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.911150] ? mtree_range_walk+0x632/0x900 [ 40.911737] ? mas_walk+0x5c7/0x7c0 [ 40.912242] do_vmi_munmap+0x1f1/0x2b0 [ 40.912767] mmap_region+0x1f9/0x2660 [ 40.913279] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.913839] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.914596] ? __pfx_lock_acquire+0x10/0x10 [ 40.915162] ? __pfx_mmap_region+0x10/0x10 [ 40.915725] ? security_mmap_addr+0x7d/0xa0 [ 40.916296] ? get_unmapped_area+0x1f5/0x3f0 [ 40.916881] do_mmap+0x854/0xf00 [ 40.917350] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.917882] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.918491] ksys_mmap_pgoff+0x3af/0x500 [ 40.919029] do_syscall_64+0x3f/0x90 [ 40.919538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.920232] RIP: 0033:0x7f826daefd82 [ 40.920718] 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 [ 40.923020] RSP: 002b:00007ffd2d8685f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.923981] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f826daefd82 [ 40.924887] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f826cf29000 [ 40.925831] RBP: 00007f826cf29000 R08: 0000000000000009 R09: 0000000000001000 [ 40.926770] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f6834b5b20 [ 40.927714] R13: 00007ffd2d868610 R14: 00007ffd2d868640 R15: 00007ffd2d8689a0 [ 40.928658] [ 40.928977] [ 40.929214] Allocated by task 212: [ 40.929702] kasan_save_stack+0x22/0x50 [ 40.930262] kasan_set_track+0x25/0x30 [ 40.930807] __kasan_slab_alloc+0x59/0x70 [ 40.931383] kmem_cache_alloc+0x16b/0x370 [ 40.931954] vm_area_dup+0x20/0x160 [ 40.932458] __split_vma+0x170/0x950 [ 40.932966] split_vma+0xc6/0x110 [ 40.933451] mprotect_fixup+0x8d2/0xb30 [ 40.934015] do_mprotect_pkey+0x87e/0xd40 [ 40.934595] __x64_sys_mprotect+0x78/0xc0 [ 40.935165] do_syscall_64+0x3f/0x90 [ 40.935686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.936395] [ 40.936634] Freed by task 212: [ 40.937067] kasan_save_stack+0x22/0x50 [ 40.937629] kasan_set_track+0x25/0x30 [ 40.938171] kasan_save_free_info+0x2b/0x50 [ 40.938762] __kasan_slab_free+0x10a/0x190 [ 40.939353] kmem_cache_free+0x10d/0x4d0 [ 40.939908] rcu_core+0x8c8/0x2860 [ 40.940398] __do_softirq+0x1b7/0x7d4 [ 40.940928] [ 40.941163] Last potentially related work creation: [ 40.941828] kasan_save_stack+0x22/0x50 [ 40.942382] __kasan_record_aux_stack+0x8e/0xa0 [ 40.943016] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.943732] remove_vma+0x139/0x170 [ 40.944231] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.944850] do_vmi_munmap+0x1f1/0x2b0 [ 40.945384] __vm_munmap+0x138/0x3a0 [ 40.945903] __x64_sys_munmap+0x59/0x80 [ 40.946471] do_syscall_64+0x3f/0x90 [ 40.946995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.947702] [ 40.947932] Second to last potentially related work creation: [ 40.948678] kasan_save_stack+0x22/0x50 [ 40.949232] __kasan_record_aux_stack+0x8e/0xa0 [ 40.949874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.950584] remove_vma+0x139/0x170 [ 40.951083] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.951689] do_vmi_munmap+0x1f1/0x2b0 [ 40.952211] mmap_region+0x1f9/0x2660 [ 40.952738] do_mmap+0x854/0xf00 [ 40.953214] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.953752] ksys_mmap_pgoff+0x3af/0x500 [ 40.954300] do_syscall_64+0x3f/0x90 [ 40.954825] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.955536] [ 40.955767] The buggy address belongs to the object at ffff88800e066ae0 [ 40.955767] which belongs to the cache vm_area_struct of size 168 [ 40.957392] The buggy address is located 88 bytes inside of [ 40.957392] freed 168-byte region [ffff88800e066ae0, ffff88800e066b88) [ 40.958910] [ 40.959141] The buggy address belongs to the physical page: [ 40.959860] page:00000000e4797d22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe066 [ 40.961024] memcg:ffff88800ebc6001 [ 40.961479] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.962230] page_type: 0xffffffff() [ 40.962713] raw: 0100000000000200 ffff88800879fc80 ffffea0000387400 dead000000000007 [ 40.963692] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc6001 [ 40.964660] page dumped because: kasan: bad access detected [ 40.965370] [ 40.965611] Memory state around the buggy address: [ 40.966259] ffff88800e066a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.967170] ffff88800e066a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 40.968083] >ffff88800e066b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.969005] ^ [ 40.969679] ffff88800e066b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.970594] ffff88800e066c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.971498] ================================================================== [ 40.972557] Disabling lock debugging due to kernel taint [ 42.940470] BUG: Bad rss-counter state mm:000000006db1809d type:MM_FILEPAGES val:33 [ 42.941451] BUG: Bad rss-counter state mm:000000006db1809d type:MM_ANONPAGES val:22 [ 43.467517] BUG: Bad rss-counter state mm:00000000dc227fb7 type:MM_FILEPAGES val:33 [ 43.468703] BUG: Bad rss-counter state mm:00000000dc227fb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25854' (ECDSA) to the list of known hosts. 2023/06/19 21:30:43 fuzzer started 2023/06/19 21:30:43 dialing manager at localhost:44161 2023/06/19 21:30:43 checking machine... 2023/06/19 21:30:43 checking revisions... [ 44.088984] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:30:44 testing simple program... [ 44.142964] cgroup: Unknown subsys name 'net' [ 44.179013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:30:38 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007fca69e636a0 RCX=00007fca69e6365c RDX=00007fca69e63660 RSI=0000000000000001 RDI=000000006490c903 RBP=0000000000000001 RSP=00007fca69e63640 R8 =00007fca69e636a0 R9 =0000000000000001 R10=0000000000000001 R11=00007fca69e638b0 R12=000000006490c903 R13=0000000000001fa0 R14=00007fca5c000ba0 R15=0000000000000003 RIP=00007fca6a2b4d52 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fca69e67700 00000000 00000000 GS =0000 0000000000000000 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=00007f37be8de618 CR3=0000000009718000 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=000000000005f9a0000000006490c903 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033343a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383231 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f9cbc3fc000 CR3=000000000963a000 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=fc3de8c81105738c0f4cbc24d9396824 XMM02=ec2efd57dc4c00df000000000011d808 XMM03=ba8d00f20af2bd88000000000011d8d8 XMM04=1e7e696aa855c20d00000000000ae988 XMM05=dfcdbad4f1609c3700000000001352d0 XMM06=806171799158d9670000000000135158 XMM07=e042d86d42eb936e00000000001248c0 XMM08=ba8d00f20af2bd88000000000011d8d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000