syzkaller login: [ 58.699339] BUG: Bad rss-counter state mm:0000000006f62746 type:MM_FILEPAGES val:33 [ 58.701048] BUG: Bad rss-counter state mm:0000000006f62746 type:MM_ANONPAGES val:22 [ 58.879520] ================================================================== [ 58.880595] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 58.881696] Read of size 8 at addr ffff888019eb2228 by task sshd/220 [ 58.882761] [ 58.883019] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 58.884199] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 58.885324] Call Trace: [ 58.885690] [ 58.886028] dump_stack_lvl+0x91/0xf0 [ 58.886617] print_report+0xcc/0x620 [ 58.887183] ? __virt_addr_valid+0x102/0x340 [ 58.887825] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.888506] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.889219] kasan_report+0xbe/0xf0 [ 58.889760] ? vma_interval_tree_remove+0xc75/0xec0 [ 58.890467] vma_interval_tree_remove+0xc75/0xec0 [ 58.891156] vma_prepare+0xc54/0x11a0 [ 58.891700] __split_vma+0x5af/0x950 [ 58.892237] ? __pfx___split_vma+0x10/0x10 [ 58.892837] ? find_held_lock+0x2c/0x110 [ 58.893410] do_vmi_align_munmap+0x2ba/0x11f0 [ 58.894045] ? lock_is_held_type+0x9f/0x120 [ 58.894650] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 58.895356] ? mtree_range_walk+0x632/0x900 [ 58.895980] ? mas_walk+0x5c7/0x7c0 [ 58.896511] do_vmi_munmap+0x1f1/0x2b0 [ 58.897071] mmap_region+0x1f9/0x2660 [ 58.897599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 58.898179] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 58.899015] ? __pfx_lock_acquire+0x10/0x10 [ 58.899600] ? __pfx_mmap_region+0x10/0x10 [ 58.900204] ? security_mmap_addr+0x7d/0xa0 [ 58.900806] ? get_unmapped_area+0x1f5/0x3f0 [ 58.901415] do_mmap+0x854/0xf00 [ 58.901918] vm_mmap_pgoff+0x1a6/0x3a0 [ 58.902484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 58.903126] ksys_mmap_pgoff+0x3af/0x500 [ 58.903695] do_syscall_64+0x3f/0x90 [ 58.904241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.904966] RIP: 0033:0x7fa13f9fad82 [ 58.905466] 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 [ 58.907842] RSP: 002b:00007ffd7cb5ab58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 58.908845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa13f9fad82 [ 58.909785] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa13ee34000 [ 58.910746] RBP: 00007fa13ee34000 R08: 0000000000000009 R09: 0000000000001000 [ 58.911669] R10: 0000000000000812 R11: 0000000000000206 R12: 000055baf542aec0 [ 58.912608] R13: 00007ffd7cb5ab70 R14: 00007ffd7cb5aba0 R15: 00007ffd7cb5af00 [ 58.913549] [ 58.913879] [ 58.914114] Allocated by task 213: [ 58.914594] kasan_save_stack+0x22/0x50 [ 58.915167] kasan_set_track+0x25/0x30 [ 58.915715] __kasan_slab_alloc+0x59/0x70 [ 58.916299] kmem_cache_alloc+0x16b/0x370 [ 58.916885] vm_area_dup+0x20/0x160 [ 58.917379] __split_vma+0x170/0x950 [ 58.917897] split_vma+0xc6/0x110 [ 58.918396] mprotect_fixup+0x8d2/0xb30 [ 58.918958] do_mprotect_pkey+0x87e/0xd40 [ 58.919529] __x64_sys_mprotect+0x78/0xc0 [ 58.920117] do_syscall_64+0x3f/0x90 [ 58.920636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.921349] [ 58.921588] Freed by task 19: [ 58.922017] kasan_save_stack+0x22/0x50 [ 58.922583] kasan_set_track+0x25/0x30 [ 58.923131] kasan_save_free_info+0x2b/0x50 [ 58.923724] __kasan_slab_free+0x10a/0x190 [ 58.924298] kmem_cache_free+0x10d/0x4d0 [ 58.924859] rcu_core+0x8c8/0x2860 [ 58.925336] __do_softirq+0x1b7/0x7d4 [ 58.925868] [ 58.926103] Last potentially related work creation: [ 58.926756] kasan_save_stack+0x22/0x50 [ 58.927295] __kasan_record_aux_stack+0x8e/0xa0 [ 58.927924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 58.928614] remove_vma+0x139/0x170 [ 58.929117] do_vmi_align_munmap+0xd4a/0x11f0 [ 58.929727] do_vmi_munmap+0x1f1/0x2b0 [ 58.930257] __vm_munmap+0x138/0x3a0 [ 58.930812] __x64_sys_munmap+0x59/0x80 [ 58.931344] do_syscall_64+0x3f/0x90 [ 58.931870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 58.932560] [ 58.932813] The buggy address belongs to the object at ffff888019eb21d0 [ 58.932813] which belongs to the cache vm_area_struct of size 168 [ 58.934416] The buggy address is located 88 bytes inside of [ 58.934416] freed 168-byte region [ffff888019eb21d0, ffff888019eb2278) [ 58.935937] [ 58.936172] The buggy address belongs to the physical page: [ 58.936884] page:00000000775133d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19eb2 [ 58.938059] memcg:ffff888015b25a01 [ 58.938544] flags: 0x100000000000200(slab|node=0|zone=1) [ 58.939251] page_type: 0xffffffff() [ 58.939751] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 58.940767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015b25a01 [ 58.941785] page dumped because: kasan: bad access detected [ 58.942517] [ 58.942764] Memory state around the buggy address: [ 58.943382] ffff888019eb2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.944322] ffff888019eb2180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 58.945256] >ffff888019eb2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 58.946179] ^ [ 58.946821] ffff888019eb2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 58.947757] ffff888019eb2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 58.948678] ================================================================== [ 58.949863] Disabling lock debugging due to kernel taint [ 61.012894] BUG: Bad rss-counter state mm:00000000a1dcbf05 type:MM_FILEPAGES val:33 [ 61.013963] BUG: Bad rss-counter state mm:00000000a1dcbf05 type:MM_ANONPAGES val:22 [ 61.507895] BUG: Bad rss-counter state mm:00000000cfa6f756 type:MM_FILEPAGES val:33 [ 61.508935] BUG: Bad rss-counter state mm:00000000cfa6f756 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30820' (ECDSA) to the list of known hosts. 2023/06/19 13:14:12 fuzzer started 2023/06/19 13:14:12 dialing manager at localhost:44161 2023/06/19 13:14:12 checking machine... 2023/06/19 13:14:12 checking revisions... [ 62.230144] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:14:12 testing simple program... [ 62.281221] cgroup: Unknown subsys name 'net' [ 62.328172] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:13:44 Registers: info registers vcpu 0 RAX=ffffffff81f0e970 RBX=ffffffff852c8b20 RCX=0000000000000000 RDX=ffff888009e30000 RSI=ffffffff81eeeb49 RDI=ffff888015df1200 RBP=ffff888015df1200 RSP=ffff88801807fd28 R8 =ffff88801807fd10 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888008f92028 R13=ffff888015df1200 R14=ffff888015df1428 R15=0000000000000000 RIP=ffffffff814c07e4 RFL=00000246 [---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 00007ff2c8482900 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=00007ff2c8a37650 CR3=000000000e5a0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffffffffffff0 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86137006 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff8113120f RFL=00000246 [---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 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=00007f86764c2008 CR3=000000000e676000 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=aa0414157341a78c32452f52091bd335 XMM02=0000000000125ab8eff9b2d0a8fce9cb XMM03=0000000000125b882c67c8bc2e329bc3 XMM04=868a8838256be81100000000000ae988 XMM05=058362ce540f29fe000000000013d770 XMM06=c291bd5c70af25b9000000000013c810 XMM07=e042d86d42eb936e000000000012d210 XMM08=6e60320824ce0af00000000000125b88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000