syzkaller login: [ 43.701963] BUG: Bad rss-counter state mm:00000000002342d9 type:MM_FILEPAGES val:33 [ 43.704033] BUG: Bad rss-counter state mm:00000000002342d9 type:MM_ANONPAGES val:22 [ 43.883606] ================================================================== [ 43.884840] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.885914] Read of size 8 at addr ffff88800fd50df0 by task sshd/225 [ 43.886762] [ 43.887007] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.887971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.889056] Call Trace: [ 43.889419] <TASK> [ 43.889736] dump_stack_lvl+0x91/0xf0 [ 43.890286] print_report+0xcc/0x620 [ 43.890825] ? __virt_addr_valid+0x102/0x340 [ 43.891443] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.892135] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.892852] kasan_report+0xbe/0xf0 [ 43.893421] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.894146] vma_interval_tree_remove+0xc75/0xec0 [ 43.894859] vma_prepare+0xc54/0x11a0 [ 43.895426] __split_vma+0x5af/0x950 [ 43.895980] ? __pfx___split_vma+0x10/0x10 [ 43.896601] ? find_held_lock+0x2c/0x110 [ 43.897210] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.897883] ? lock_is_held_type+0x9f/0x120 [ 43.898502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.899205] ? mtree_range_walk+0x632/0x900 [ 43.899842] ? mas_walk+0x5c7/0x7c0 [ 43.900392] do_vmi_munmap+0x1f1/0x2b0 [ 43.900973] mmap_region+0x1f9/0x2660 [ 43.901544] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.902141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.902970] ? __pfx_lock_acquire+0x10/0x10 [ 43.903583] ? __pfx_mmap_region+0x10/0x10 [ 43.904200] ? security_mmap_addr+0x7d/0xa0 [ 43.904815] ? get_unmapped_area+0x1f5/0x3f0 [ 43.905478] do_mmap+0x854/0xf00 [ 43.905989] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.906565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.907213] ksys_mmap_pgoff+0x3af/0x500 [ 43.907794] do_syscall_64+0x3f/0x90 [ 43.908350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.909115] RIP: 0033:0x7ff063e5bd82 [ 43.909659] 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 [ 43.912038] RSP: 002b:00007fff9f5ccb18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.913045] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff063e5bd82 [ 43.913996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff063295000 [ 43.914945] RBP: 00007ff063295000 R08: 0000000000000009 R09: 0000000000001000 [ 43.915892] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565c99f6f70 [ 43.916860] R13: 00007fff9f5ccb30 R14: 00007fff9f5ccb60 R15: 00007fff9f5ccec0 [ 43.917833] </TASK> [ 43.918157] [ 43.918396] Allocated by task 218: [ 43.918877] kasan_save_stack+0x22/0x50 [ 43.919452] kasan_set_track+0x25/0x30 [ 43.920014] __kasan_slab_alloc+0x59/0x70 [ 43.920596] kmem_cache_alloc+0x16b/0x370 [ 43.921169] vm_area_dup+0x20/0x160 [ 43.921677] __split_vma+0x170/0x950 [ 43.922187] split_vma+0xc6/0x110 [ 43.922670] mprotect_fixup+0x8d2/0xb30 [ 43.923226] do_mprotect_pkey+0x87e/0xd40 [ 43.923812] __x64_sys_mprotect+0x78/0xc0 [ 43.924388] do_syscall_64+0x3f/0x90 [ 43.924915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.925679] [ 43.925922] Freed by task 19: [ 43.926350] kasan_save_stack+0x22/0x50 [ 43.926925] kasan_set_track+0x25/0x30 [ 43.927512] kasan_save_free_info+0x2b/0x50 [ 43.928131] __kasan_slab_free+0x10a/0x190 [ 43.928746] kmem_cache_free+0x10d/0x4d0 [ 43.929337] rcu_core+0x8c8/0x2860 [ 43.929858] __do_softirq+0x1b7/0x7d4 [ 43.930409] [ 43.930658] Last potentially related work creation: [ 43.931340] kasan_save_stack+0x22/0x50 [ 43.931938] __kasan_record_aux_stack+0x8e/0xa0 [ 43.932610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.933370] remove_vma+0x139/0x170 [ 43.933827] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.934392] do_vmi_munmap+0x1f1/0x2b0 [ 43.934878] __vm_munmap+0x138/0x3a0 [ 43.935349] __x64_sys_munmap+0x59/0x80 [ 43.935846] do_syscall_64+0x3f/0x90 [ 43.936315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.936949] [ 43.937166] The buggy address belongs to the object at ffff88800fd50d98 [ 43.937166] which belongs to the cache vm_area_struct of size 168 [ 43.938651] The buggy address is located 88 bytes inside of [ 43.938651] freed 168-byte region [ffff88800fd50d98, ffff88800fd50e40) [ 43.940050] [ 43.940269] The buggy address belongs to the physical page: [ 43.940923] page:000000007fae008b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd50 [ 43.942118] memcg:ffff888016a03c01 [ 43.942619] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.943372] page_type: 0xffffffff() [ 43.943892] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.944955] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a03c01 [ 43.946030] page dumped because: kasan: bad access detected [ 43.946802] [ 43.947053] Memory state around the buggy address: [ 43.947739] ffff88800fd50c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 43.948741] ffff88800fd50d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 43.949746] >ffff88800fd50d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 43.950706] ^ [ 43.951502] ffff88800fd50e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.952345] ffff88800fd50e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.953185] ================================================================== [ 43.954145] Disabling lock debugging due to kernel taint [ 46.314870] BUG: Bad rss-counter state mm:00000000f4eeeff9 type:MM_FILEPAGES val:33 [ 46.315943] BUG: Bad rss-counter state mm:00000000f4eeeff9 type:MM_ANONPAGES val:22 [ 46.781111] BUG: Bad rss-counter state mm:00000000659a67d4 type:MM_FILEPAGES val:33 [ 46.782167] BUG: Bad rss-counter state mm:00000000659a67d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28134' (ECDSA) to the list of known hosts. 2023/06/19 21:49:11 fuzzer started 2023/06/19 21:49:11 dialing manager at localhost:44161 2023/06/19 21:49:11 checking machine... 2023/06/19 21:49:11 checking revisions... [ 47.438166] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:49:11 testing simple program... [ 47.482526] cgroup: Unknown subsys name 'net' [ 47.520642] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:49:06 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110028e6e99 RSI=ffffffff818db03b RDI=ffff888014737468 RBP=ffff8880147374c0 RSP=ffff8880147373f8 R8 =0000000000000001 R9 =ffff8880147374a8 R10=0000000000038001 R11=0000000000025fbc R12=ffff8880147374c8 R13=ffff8880147374b0 R14=ffff888014751b40 R15=ffff888014737468 RIP=ffffffff81130682 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f670bc01900 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=00007f670b0088f0 CR3=000000001459c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a8dd32187f264a6d00000000000ae988 XMM05=b7c69768b24919e200000000001354c0 XMM06=ae9b264101391a5b0000000000133860 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffd713cecb8 CR3=000000000d8c0000 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=2030313a39343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000