syzkaller login: [ 46.477237] BUG: Bad rss-counter state mm:000000007416e4e1 type:MM_FILEPAGES val:33 [ 46.477974] BUG: Bad rss-counter state mm:000000007416e4e1 type:MM_ANONPAGES val:22 [ 46.630130] ================================================================== [ 46.631229] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.632344] Read of size 8 at addr ffff88801bc185c8 by task sshd/220 [ 46.633442] [ 46.633726] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.634602] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.635603] Call Trace: [ 46.635925] [ 46.636210] dump_stack_lvl+0x91/0xf0 [ 46.636705] print_report+0xcc/0x620 [ 46.637191] ? __virt_addr_valid+0x102/0x340 [ 46.637756] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.638379] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.639008] kasan_report+0xbe/0xf0 [ 46.639487] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.640119] vma_interval_tree_remove+0xc75/0xec0 [ 46.640723] vma_prepare+0xc54/0x11a0 [ 46.641207] __split_vma+0x5af/0x950 [ 46.641694] ? __pfx___split_vma+0x10/0x10 [ 46.642239] ? find_held_lock+0x2c/0x110 [ 46.642765] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.643334] ? lock_is_held_type+0x9f/0x120 [ 46.643877] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.644494] ? mtree_range_walk+0x632/0x900 [ 46.645049] ? mas_walk+0x5c7/0x7c0 [ 46.645553] do_vmi_munmap+0x1f1/0x2b0 [ 46.646056] mmap_region+0x1f9/0x2660 [ 46.646551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.647073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.647810] ? __pfx_lock_acquire+0x10/0x10 [ 46.648346] ? __pfx_mmap_region+0x10/0x10 [ 46.648883] ? security_mmap_addr+0x7d/0xa0 [ 46.649417] ? get_unmapped_area+0x1f5/0x3f0 [ 46.649979] do_mmap+0x854/0xf00 [ 46.650418] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.650915] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.651479] ksys_mmap_pgoff+0x3af/0x500 [ 46.651989] do_syscall_64+0x3f/0x90 [ 46.652469] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.653117] RIP: 0033:0x7f718f9a8d82 [ 46.653582] 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 [ 46.655728] RSP: 002b:00007ffc82299b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.656633] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f718f9a8d82 [ 46.657514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f718ede2000 [ 46.658372] RBP: 00007f718ede2000 R08: 0000000000000009 R09: 0000000000001000 [ 46.659219] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560423cbbd90 [ 46.660071] R13: 00007ffc82299b30 R14: 00007ffc82299b60 R15: 00007ffc82299ec0 [ 46.660921] [ 46.661210] [ 46.661428] Allocated by task 213: [ 46.661865] kasan_save_stack+0x22/0x50 [ 46.662376] kasan_set_track+0x25/0x30 [ 46.662869] __kasan_slab_alloc+0x59/0x70 [ 46.663396] kmem_cache_alloc+0x16b/0x370 [ 46.663908] vm_area_dup+0x20/0x160 [ 46.664366] __split_vma+0x170/0x950 [ 46.664837] split_vma+0xc6/0x110 [ 46.665272] mprotect_fixup+0x8d2/0xb30 [ 46.665793] do_mprotect_pkey+0x87e/0xd40 [ 46.666322] __x64_sys_mprotect+0x78/0xc0 [ 46.666847] do_syscall_64+0x3f/0x90 [ 46.667316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.667961] [ 46.668174] Freed by task 13: [ 46.668561] kasan_save_stack+0x22/0x50 [ 46.669067] kasan_set_track+0x25/0x30 [ 46.669584] kasan_save_free_info+0x2b/0x50 [ 46.670122] __kasan_slab_free+0x10a/0x190 [ 46.670654] kmem_cache_free+0x10d/0x4d0 [ 46.671175] rcu_core+0x8c8/0x2860 [ 46.671619] __do_softirq+0x1b7/0x7d4 [ 46.672108] [ 46.672324] Last potentially related work creation: [ 46.672908] kasan_save_stack+0x22/0x50 [ 46.673417] __kasan_record_aux_stack+0x8e/0xa0 [ 46.673995] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.674718] remove_vma+0x139/0x170 [ 46.675168] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.675725] do_vmi_munmap+0x1f1/0x2b0 [ 46.676213] __vm_munmap+0x138/0x3a0 [ 46.676679] __x64_sys_munmap+0x59/0x80 [ 46.677185] do_syscall_64+0x3f/0x90 [ 46.677681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.678318] [ 46.678532] The buggy address belongs to the object at ffff88801bc18570 [ 46.678532] which belongs to the cache vm_area_struct of size 168 [ 46.680017] The buggy address is located 88 bytes inside of [ 46.680017] freed 168-byte region [ffff88801bc18570, ffff88801bc18618) [ 46.681415] [ 46.681640] The buggy address belongs to the physical page: [ 46.682292] page:000000005a07bc67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc18 [ 46.683390] memcg:ffff88800f34a701 [ 46.683815] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.684457] page_type: 0xffffffff() [ 46.684903] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.685841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f34a701 [ 46.686748] page dumped because: kasan: bad access detected [ 46.687408] [ 46.687622] Memory state around the buggy address: [ 46.688193] ffff88801bc18480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.689042] ffff88801bc18500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 46.689908] >ffff88801bc18580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.690764] ^ [ 46.691426] ffff88801bc18600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 46.692267] ffff88801bc18680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.693120] ================================================================== [ 46.694054] Disabling lock debugging due to kernel taint [ 48.291982] BUG: Bad rss-counter state mm:00000000737eac82 type:MM_FILEPAGES val:33 [ 48.292521] BUG: Bad rss-counter state mm:00000000737eac82 type:MM_ANONPAGES val:22 [ 48.704766] BUG: Bad rss-counter state mm:000000004708ca5d type:MM_FILEPAGES val:33 [ 48.705780] BUG: Bad rss-counter state mm:000000004708ca5d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63252' (ECDSA) to the list of known hosts. 2023/06/19 22:53:01 fuzzer started 2023/06/19 22:53:01 dialing manager at localhost:44161 2023/06/19 22:53:01 checking machine... 2023/06/19 22:53:01 checking revisions... [ 49.412439] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:53:02 testing simple program... [ 49.465463] cgroup: Unknown subsys name 'net' [ 49.503777] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:52:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d837cc0 RCX=ffff88800844f780 RDX=ffffea0000357480 RSI=0000000000000008 RDI=ffffffff818061b3 RBP=0000000000000000 RSP=ffff88800fc5fc98 R8 =ffff88800d5d24c0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000d000c R12=dffffc0000000000 R13=ffff88800fc5fcd8 R14=ffff88800844f780 R15=ffff88800e2f8d10 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f1ee30e1900 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=00007ffd1322c000 CR3=000000000fd6e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007f70c0ba9000 CR3=000000001a1a0000 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=2031303a33353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000