syzkaller login: [ 43.378262] BUG: Bad rss-counter state mm:00000000bd68aac2 type:MM_FILEPAGES val:33 [ 43.378809] BUG: Bad rss-counter state mm:00000000bd68aac2 type:MM_ANONPAGES val:22 [ 43.531425] ================================================================== [ 43.532371] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.533468] Read of size 8 at addr ffff88800e081ed8 by task sshd/219 [ 43.534305] [ 43.534530] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.535467] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.536528] Call Trace: [ 43.536863] [ 43.537168] dump_stack_lvl+0x91/0xf0 [ 43.537689] print_report+0xcc/0x620 [ 43.538195] ? __virt_addr_valid+0x102/0x340 [ 43.538783] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.539456] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.540096] kasan_report+0xbe/0xf0 [ 43.540610] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.541260] vma_interval_tree_remove+0xc75/0xec0 [ 43.541897] vma_prepare+0xc54/0x11a0 [ 43.542401] __split_vma+0x5af/0x950 [ 43.542905] ? __pfx___split_vma+0x10/0x10 [ 43.543490] ? find_held_lock+0x2c/0x110 [ 43.544043] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.544647] ? lock_is_held_type+0x9f/0x120 [ 43.545215] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.545859] ? mtree_range_walk+0x632/0x900 [ 43.546450] ? mas_walk+0x5c7/0x7c0 [ 43.546999] do_vmi_munmap+0x1f1/0x2b0 [ 43.547526] mmap_region+0x1f9/0x2660 [ 43.548041] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.548585] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.549352] ? __pfx_lock_acquire+0x10/0x10 [ 43.549920] ? __pfx_mmap_region+0x10/0x10 [ 43.550479] ? security_mmap_addr+0x7d/0xa0 [ 43.551044] ? get_unmapped_area+0x1f5/0x3f0 [ 43.551628] do_mmap+0x854/0xf00 [ 43.552094] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.552619] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.553211] ksys_mmap_pgoff+0x3af/0x500 [ 43.553751] do_syscall_64+0x3f/0x90 [ 43.554264] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.554980] RIP: 0033:0x7f6f1aa22d82 [ 43.555480] 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 [ 43.557803] RSP: 002b:00007ffd641802a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.558796] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f1aa22d82 [ 43.559738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f19e5c000 [ 43.560662] RBP: 00007f6f19e5c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.561591] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648613c4ec0 [ 43.562529] R13: 00007ffd641802c0 R14: 00007ffd641802f0 R15: 00007ffd64180650 [ 43.563478] [ 43.563807] [ 43.564044] Allocated by task 212: [ 43.564515] kasan_save_stack+0x22/0x50 [ 43.565074] kasan_set_track+0x25/0x30 [ 43.565622] __kasan_slab_alloc+0x59/0x70 [ 43.566200] kmem_cache_alloc+0x16b/0x370 [ 43.566770] vm_area_dup+0x20/0x160 [ 43.567288] __split_vma+0x170/0x950 [ 43.567805] split_vma+0xc6/0x110 [ 43.568296] mprotect_fixup+0x8d2/0xb30 [ 43.568852] do_mprotect_pkey+0x87e/0xd40 [ 43.569429] __x64_sys_mprotect+0x78/0xc0 [ 43.570011] do_syscall_64+0x3f/0x90 [ 43.570537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.571255] [ 43.571498] Freed by task 13: [ 43.571925] kasan_save_stack+0x22/0x50 [ 43.572486] kasan_set_track+0x25/0x30 [ 43.573031] kasan_save_free_info+0x2b/0x50 [ 43.573621] __kasan_slab_free+0x10a/0x190 [ 43.574222] kmem_cache_free+0x10d/0x4d0 [ 43.574817] rcu_core+0x8c8/0x2860 [ 43.575341] __do_softirq+0x1b7/0x7d4 [ 43.575875] [ 43.576118] Last potentially related work creation: [ 43.576773] kasan_save_stack+0x22/0x50 [ 43.577338] __kasan_record_aux_stack+0x8e/0xa0 [ 43.577982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.578701] remove_vma+0x139/0x170 [ 43.579211] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.579837] do_vmi_munmap+0x1f1/0x2b0 [ 43.580386] __vm_munmap+0x138/0x3a0 [ 43.580910] __x64_sys_munmap+0x59/0x80 [ 43.581470] do_syscall_64+0x3f/0x90 [ 43.581994] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.582723] [ 43.582974] The buggy address belongs to the object at ffff88800e081e80 [ 43.582974] which belongs to the cache vm_area_struct of size 168 [ 43.584610] The buggy address is located 88 bytes inside of [ 43.584610] freed 168-byte region [ffff88800e081e80, ffff88800e081f28) [ 43.586018] [ 43.586237] The buggy address belongs to the physical page: [ 43.586889] page:0000000058b1443c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe081 [ 43.588033] memcg:ffff88800e03c001 [ 43.588469] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.589118] page_type: 0xffffffff() [ 43.589568] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 43.590482] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e03c001 [ 43.591403] page dumped because: kasan: bad access detected [ 43.592073] [ 43.592292] Memory state around the buggy address: [ 43.592872] ffff88800e081d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 43.593731] ffff88800e081e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.594594] >ffff88800e081e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.595478] ^ [ 43.596246] ffff88800e081f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 43.597113] ffff88800e081f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 43.597987] ================================================================== [ 43.598912] Disabling lock debugging due to kernel taint [ 45.242574] BUG: Bad rss-counter state mm:00000000348da4d1 type:MM_FILEPAGES val:33 [ 45.243582] BUG: Bad rss-counter state mm:00000000348da4d1 type:MM_ANONPAGES val:22 [ 45.642127] BUG: Bad rss-counter state mm:00000000d7ed3a8c type:MM_FILEPAGES val:33 [ 45.642945] BUG: Bad rss-counter state mm:00000000d7ed3a8c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47424' (ECDSA) to the list of known hosts. 2023/06/19 19:05:43 fuzzer started 2023/06/19 19:05:43 dialing manager at localhost:44161 2023/06/19 19:05:43 checking machine... 2023/06/19 19:05:43 checking revisions... [ 46.352261] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:05:43 testing simple program... [ 46.407198] cgroup: Unknown subsys name 'net' [ 46.448245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:05:38 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=ffffffff8180c585 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff8613751e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800d6b0000 R15=ffff88800e0b3080 RIP=ffffffff84532440 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 00007f22d4647900 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=00007f22d4626020 CR3=000000000fd94000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f37b930c630 CR3=000000000d8be000 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=2032343a35303a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000