syzkaller login: [ 31.106585] BUG: Bad rss-counter state mm:000000006fb81204 type:MM_FILEPAGES val:33 [ 31.108117] BUG: Bad rss-counter state mm:000000006fb81204 type:MM_ANONPAGES val:22 [ 31.258173] ================================================================== [ 31.259090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.260055] Read of size 8 at addr ffff888016cde5c8 by task sshd/221 [ 31.260821] [ 31.261042] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.262066] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.263046] Call Trace: [ 31.263395] [ 31.263704] dump_stack_lvl+0x91/0xf0 [ 31.264197] print_report+0xcc/0x620 [ 31.264695] ? __virt_addr_valid+0x102/0x340 [ 31.265250] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265872] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266487] kasan_report+0xbe/0xf0 [ 31.266968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267604] vma_interval_tree_remove+0xc75/0xec0 [ 31.268202] vma_prepare+0xc54/0x11a0 [ 31.268682] __split_vma+0x5af/0x950 [ 31.269159] ? __pfx___split_vma+0x10/0x10 [ 31.269690] ? find_held_lock+0x2c/0x110 [ 31.270219] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270788] ? lock_is_held_type+0x9f/0x120 [ 31.271343] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.271960] ? mtree_range_walk+0x632/0x900 [ 31.272519] ? mas_walk+0x5c7/0x7c0 [ 31.272999] do_vmi_munmap+0x1f1/0x2b0 [ 31.273504] mmap_region+0x1f9/0x2660 [ 31.273988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.274505] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.275229] ? __pfx_lock_acquire+0x10/0x10 [ 31.275784] ? __pfx_mmap_region+0x10/0x10 [ 31.276316] ? security_mmap_addr+0x7d/0xa0 [ 31.276855] ? get_unmapped_area+0x1f5/0x3f0 [ 31.277412] do_mmap+0x854/0xf00 [ 31.277860] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.278355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.278935] ksys_mmap_pgoff+0x3af/0x500 [ 31.279463] do_syscall_64+0x3f/0x90 [ 31.279947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280602] RIP: 0033:0x7f7b1373cd82 [ 31.281065] 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 [ 31.283199] RSP: 002b:00007ffc9a078e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.284129] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b1373cd82 [ 31.284989] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b12b76000 [ 31.285838] RBP: 00007f7b12b76000 R08: 0000000000000009 R09: 0000000000001000 [ 31.286683] R10: 0000000000000812 R11: 0000000000000206 R12: 000055983a108ec0 [ 31.287540] R13: 00007ffc9a078e30 R14: 00007ffc9a078e60 R15: 00007ffc9a0791c0 [ 31.288403] [ 31.288704] [ 31.288919] Allocated by task 214: [ 31.289354] kasan_save_stack+0x22/0x50 [ 31.289863] kasan_set_track+0x25/0x30 [ 31.290367] __kasan_slab_alloc+0x59/0x70 [ 31.290891] kmem_cache_alloc+0x16b/0x370 [ 31.291419] vm_area_dup+0x20/0x160 [ 31.291885] __split_vma+0x170/0x950 [ 31.292373] split_vma+0xc6/0x110 [ 31.292817] mprotect_fixup+0x8d2/0xb30 [ 31.293332] do_mprotect_pkey+0x87e/0xd40 [ 31.293853] __x64_sys_mprotect+0x78/0xc0 [ 31.294381] do_syscall_64+0x3f/0x90 [ 31.294864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.295537] [ 31.295755] Freed by task 214: [ 31.296156] kasan_save_stack+0x22/0x50 [ 31.296662] kasan_set_track+0x25/0x30 [ 31.297161] kasan_save_free_info+0x2b/0x50 [ 31.297702] __kasan_slab_free+0x10a/0x190 [ 31.298237] kmem_cache_free+0x10d/0x4d0 [ 31.298750] rcu_core+0x8c8/0x2860 [ 31.299194] __do_softirq+0x1b7/0x7d4 [ 31.299680] [ 31.299906] Last potentially related work creation: [ 31.300531] kasan_save_stack+0x22/0x50 [ 31.301060] __kasan_record_aux_stack+0x8e/0xa0 [ 31.301658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.302337] remove_vma+0x139/0x170 [ 31.302905] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.303525] do_vmi_munmap+0x1f1/0x2b0 [ 31.304045] __vm_munmap+0x138/0x3a0 [ 31.304545] __x64_sys_munmap+0x59/0x80 [ 31.305074] do_syscall_64+0x3f/0x90 [ 31.305576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306271] [ 31.306496] The buggy address belongs to the object at ffff888016cde570 [ 31.306496] which belongs to the cache vm_area_struct of size 168 [ 31.308089] The buggy address is located 88 bytes inside of [ 31.308089] freed 168-byte region [ffff888016cde570, ffff888016cde618) [ 31.309609] [ 31.309842] The buggy address belongs to the physical page: [ 31.310546] page:000000009f30b156 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cde [ 31.311724] memcg:ffff88800f536c01 [ 31.312180] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.312876] page_type: 0xffffffff() [ 31.313354] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.314348] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f536c01 [ 31.315340] page dumped because: kasan: bad access detected [ 31.316058] [ 31.316293] Memory state around the buggy address: [ 31.316918] ffff888016cde480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.317844] ffff888016cde500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.318767] >ffff888016cde580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.319694] ^ [ 31.320410] ffff888016cde600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.321332] ffff888016cde680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.322251] ================================================================== [ 31.323392] Disabling lock debugging due to kernel taint [ 33.315008] BUG: Bad rss-counter state mm:000000003f65cf56 type:MM_FILEPAGES val:33 [ 33.316211] BUG: Bad rss-counter state mm:000000003f65cf56 type:MM_ANONPAGES val:22 [ 33.759204] BUG: Bad rss-counter state mm:00000000b37d2ce3 type:MM_FILEPAGES val:33 [ 33.760025] BUG: Bad rss-counter state mm:00000000b37d2ce3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64722' (ECDSA) to the list of known hosts. 2023/06/20 18:10:05 fuzzer started 2023/06/20 18:10:06 dialing manager at localhost:36067 2023/06/20 18:10:06 checking machine... 2023/06/20 18:10:06 checking revisions... [ 34.505080] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:10:06 testing simple program... [ 34.554048] cgroup: Unknown subsys name 'net' [ 34.612979] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:10:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f3382cff240 CR3=00000000194b6000 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=2035303a30313a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a30313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000561dfb7c1780 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffffffffffff RBP=0000000000000000 RSP=00007ffe3a831a18 R8 =0000000000000000 R9 =0000000000000001 R10=00007efe582853c0 R11=0000000000000246 R12=00000000ffffffe3 R13=0000561dfa6591c0 R14=00007ffe3a831da0 R15=00007ffe3a831b50 RIP=0000561dfa5fe657 RFL=00000213 [----A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efe57eb5900 00000000 00000000 GS =0000 0000000000000000 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=00007efe58281328 CR3=0000000015b52000 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=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