syzkaller login: [ 32.924831] BUG: Bad rss-counter state mm:00000000424503cf type:MM_FILEPAGES val:33 [ 32.926182] BUG: Bad rss-counter state mm:00000000424503cf type:MM_ANONPAGES val:22 [ 33.068406] ================================================================== [ 33.069694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.071166] Read of size 8 at addr ffff888016b5c3f8 by task sshd/219 [ 33.072140] [ 33.072396] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.073454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.074630] Call Trace: [ 33.075039] [ 33.075385] dump_stack_lvl+0x91/0xf0 [ 33.075969] print_report+0xcc/0x620 [ 33.076559] ? __virt_addr_valid+0x102/0x340 [ 33.077236] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.077988] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.078729] kasan_report+0xbe/0xf0 [ 33.079318] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.080074] vma_interval_tree_remove+0xc75/0xec0 [ 33.080802] vma_prepare+0xc54/0x11a0 [ 33.081385] __split_vma+0x5af/0x950 [ 33.081953] ? __pfx___split_vma+0x10/0x10 [ 33.082598] ? find_held_lock+0x2c/0x110 [ 33.083235] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.083919] ? lock_is_held_type+0x9f/0x120 [ 33.084579] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.085305] ? mtree_range_walk+0x632/0x900 [ 33.085970] ? mas_walk+0x5c7/0x7c0 [ 33.086482] do_vmi_munmap+0x1f1/0x2b0 [ 33.086960] mmap_region+0x1f9/0x2660 [ 33.087454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.087959] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.088665] ? __pfx_lock_acquire+0x10/0x10 [ 33.089204] ? __pfx_mmap_region+0x10/0x10 [ 33.089733] ? security_mmap_addr+0x7d/0xa0 [ 33.090248] ? get_unmapped_area+0x1f5/0x3f0 [ 33.090791] do_mmap+0x854/0xf00 [ 33.091218] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.091712] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.092271] ksys_mmap_pgoff+0x3af/0x500 [ 33.092780] do_syscall_64+0x3f/0x90 [ 33.093251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.093892] RIP: 0033:0x7ffa1444ed82 [ 33.094338] 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 [ 33.096466] RSP: 002b:00007ffd3f8b1638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.097381] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa1444ed82 [ 33.098217] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa13888000 [ 33.099077] RBP: 00007ffa13888000 R08: 0000000000000009 R09: 0000000000001000 [ 33.099919] R10: 0000000000000812 R11: 0000000000000206 R12: 000056357e8d8f70 [ 33.100756] R13: 00007ffd3f8b1650 R14: 00007ffd3f8b1680 R15: 00007ffd3f8b19e0 [ 33.101612] [ 33.101897] [ 33.102111] Allocated by task 212: [ 33.102530] kasan_save_stack+0x22/0x50 [ 33.103035] kasan_set_track+0x25/0x30 [ 33.103523] __kasan_slab_alloc+0x59/0x70 [ 33.104043] kmem_cache_alloc+0x16b/0x370 [ 33.104556] vm_area_dup+0x20/0x160 [ 33.105013] __split_vma+0x170/0x950 [ 33.105470] split_vma+0xc6/0x110 [ 33.105904] mprotect_fixup+0x8d2/0xb30 [ 33.106409] do_mprotect_pkey+0x87e/0xd40 [ 33.106922] __x64_sys_mprotect+0x78/0xc0 [ 33.107454] do_syscall_64+0x3f/0x90 [ 33.107925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.108559] [ 33.108772] Freed by task 212: [ 33.109151] kasan_save_stack+0x22/0x50 [ 33.109658] kasan_set_track+0x25/0x30 [ 33.110146] kasan_save_free_info+0x2b/0x50 [ 33.110675] __kasan_slab_free+0x10a/0x190 [ 33.111222] kmem_cache_free+0x10d/0x4d0 [ 33.111730] rcu_core+0x8c8/0x2860 [ 33.112163] __do_softirq+0x1b7/0x7d4 [ 33.112642] [ 33.112860] Last potentially related work creation: [ 33.113437] kasan_save_stack+0x22/0x50 [ 33.113937] __kasan_record_aux_stack+0x8e/0xa0 [ 33.114513] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.115157] remove_vma+0x139/0x170 [ 33.115610] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.116154] do_vmi_munmap+0x1f1/0x2b0 [ 33.116648] __vm_munmap+0x138/0x3a0 [ 33.117107] __x64_sys_munmap+0x59/0x80 [ 33.117600] do_syscall_64+0x3f/0x90 [ 33.118068] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.118712] [ 33.118926] The buggy address belongs to the object at ffff888016b5c3a0 [ 33.118926] which belongs to the cache vm_area_struct of size 168 [ 33.120417] The buggy address is located 88 bytes inside of [ 33.120417] freed 168-byte region [ffff888016b5c3a0, ffff888016b5c448) [ 33.121798] [ 33.122010] The buggy address belongs to the physical page: [ 33.122659] page:000000005354cbe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b5c [ 33.123756] memcg:ffff888014641401 [ 33.124176] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.124809] page_type: 0xffffffff() [ 33.125256] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.126173] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888014641401 [ 33.127079] page dumped because: kasan: bad access detected [ 33.127749] [ 33.127956] Memory state around the buggy address: [ 33.128528] ffff888016b5c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.129364] ffff888016b5c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.130199] >ffff888016b5c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.131061] ^ [ 33.131891] ffff888016b5c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.132736] ffff888016b5c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.133576] ================================================================== [ 33.134610] Disabling lock debugging due to kernel taint [ 34.943470] BUG: Bad rss-counter state mm:000000006b119d8e type:MM_FILEPAGES val:33 [ 34.944228] BUG: Bad rss-counter state mm:000000006b119d8e type:MM_ANONPAGES val:22 [ 35.331115] BUG: Bad rss-counter state mm:00000000dd26f35f type:MM_FILEPAGES val:33 [ 35.331934] BUG: Bad rss-counter state mm:00000000dd26f35f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24933' (ECDSA) to the list of known hosts. 2023/06/20 00:56:31 fuzzer started 2023/06/20 00:56:31 dialing manager at localhost:44161 2023/06/20 00:56:31 checking machine... 2023/06/20 00:56:31 checking revisions... [ 36.039410] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:56:31 testing simple program... [ 36.091744] cgroup: Unknown subsys name 'net' [ 36.135630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:56:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81740f90 RDX=000000000000740f RSI=000000000000740f RDI=ffffffff86504bfc RBP=ffff88800eb46f70 RSP=ffff88800eb46ea8 R8 =0000000000000000 R9 =ffff88800eb46f58 R10=0000000000038001 R11=000000000001e41e R12=ffff88800eb46f78 R13=ffff88800eb46f60 R14=ffff88800eb46f59 R15=ffff88800eb46f18 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f76329ea900 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=00007f76329a3008 CR3=000000000f020000 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=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=00007f389f175bf0 CR3=0000000016376000 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=2031333a36353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000