syzkaller login: [ 31.628458] BUG: Bad rss-counter state mm:00000000f06e8cde type:MM_FILEPAGES val:33 [ 31.629168] BUG: Bad rss-counter state mm:00000000f06e8cde type:MM_ANONPAGES val:22 [ 31.659800] ================================================================== [ 31.660599] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.661335] Read of size 8 at addr ffff88800fd72df0 by task sshd/219 [ 31.661866] [ 31.662026] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.662857] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.663565] Call Trace: [ 31.663927] [ 31.664171] dump_stack_lvl+0x91/0xf0 [ 31.664494] print_report+0xcc/0x620 [ 31.664808] ? __virt_addr_valid+0x102/0x340 [ 31.665172] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.665603] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666076] kasan_report+0xbe/0xf0 [ 31.666423] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.666892] vma_interval_tree_remove+0xc75/0xec0 [ 31.667333] vma_prepare+0xc54/0x11a0 [ 31.667641] __split_vma+0x5af/0x950 [ 31.667956] ? __pfx___split_vma+0x10/0x10 [ 31.668360] ? find_held_lock+0x2c/0x110 [ 31.668711] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.669107] ? lock_is_held_type+0x9f/0x120 [ 31.669537] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.670092] ? mtree_range_walk+0x632/0x900 [ 31.670465] ? mas_walk+0x5c7/0x7c0 [ 31.670790] do_vmi_munmap+0x1f1/0x2b0 [ 31.671146] mmap_region+0x1f9/0x2660 [ 31.671541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.671911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.672512] ? __pfx_lock_acquire+0x10/0x10 [ 31.672860] ? __pfx_mmap_region+0x10/0x10 [ 31.673248] ? security_mmap_addr+0x7d/0xa0 [ 31.673614] ? get_unmapped_area+0x1f5/0x3f0 [ 31.673986] do_mmap+0x854/0xf00 [ 31.674340] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.674700] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.675074] ksys_mmap_pgoff+0x3af/0x500 [ 31.675429] do_syscall_64+0x3f/0x90 [ 31.675768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.676255] RIP: 0033:0x7ff598921d82 [ 31.676600] 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 [ 31.678070] RSP: 002b:00007ffe9718a8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.678720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff598921d82 [ 31.679311] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff597d5b000 [ 31.679901] RBP: 00007ff597d5b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.680573] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561dd0096b20 [ 31.681155] R13: 00007ffe9718a8d0 R14: 00007ffe9718a900 R15: 00007ffe9718ac60 [ 31.681760] [ 31.681966] [ 31.682120] Allocated by task 212: [ 31.682425] kasan_save_stack+0x22/0x50 [ 31.682787] kasan_set_track+0x25/0x30 [ 31.683140] __kasan_slab_alloc+0x59/0x70 [ 31.683509] kmem_cache_alloc+0x16b/0x370 [ 31.683870] vm_area_dup+0x20/0x160 [ 31.684254] __split_vma+0x170/0x950 [ 31.684588] split_vma+0xc6/0x110 [ 31.684890] mprotect_fixup+0x8d2/0xb30 [ 31.685245] do_mprotect_pkey+0x87e/0xd40 [ 31.685605] __x64_sys_mprotect+0x78/0xc0 [ 31.685963] do_syscall_64+0x3f/0x90 [ 31.686298] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.686742] [ 31.686897] Freed by task 212: [ 31.687199] kasan_save_stack+0x22/0x50 [ 31.687552] kasan_set_track+0x25/0x30 [ 31.687893] kasan_save_free_info+0x2b/0x50 [ 31.688333] __kasan_slab_free+0x10a/0x190 [ 31.688708] kmem_cache_free+0x10d/0x4d0 [ 31.689067] rcu_core+0x8c8/0x2860 [ 31.689375] __do_softirq+0x1b7/0x7d4 [ 31.689691] [ 31.689840] Last potentially related work creation: [ 31.690247] kasan_save_stack+0x22/0x50 [ 31.690583] __kasan_record_aux_stack+0x8e/0xa0 [ 31.690943] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.691369] remove_vma+0x139/0x170 [ 31.691658] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.692032] do_vmi_munmap+0x1f1/0x2b0 [ 31.692414] __vm_munmap+0x138/0x3a0 [ 31.692711] __x64_sys_munmap+0x59/0x80 [ 31.693032] do_syscall_64+0x3f/0x90 [ 31.693339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.693753] [ 31.693892] The buggy address belongs to the object at ffff88800fd72d98 [ 31.693892] which belongs to the cache vm_area_struct of size 168 [ 31.694870] The buggy address is located 88 bytes inside of [ 31.694870] freed 168-byte region [ffff88800fd72d98, ffff88800fd72e40) [ 31.695803] [ 31.695947] The buggy address belongs to the physical page: [ 31.696445] page:00000000e3ca2e98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd72 [ 31.697173] memcg:ffff88800e9c4501 [ 31.697449] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.697872] page_type: 0xffffffff() [ 31.698161] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.698762] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9c4501 [ 31.699352] page dumped because: kasan: bad access detected [ 31.699783] [ 31.699924] Memory state around the buggy address: [ 31.700349] ffff88800fd72c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.700900] ffff88800fd72d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.701456] >ffff88800fd72d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.701997] ^ [ 31.702557] ffff88800fd72e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.703101] ffff88800fd72e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.703655] ================================================================== [ 31.704674] Disabling lock debugging due to kernel taint [ 33.553174] BUG: Bad rss-counter state mm:00000000db7f75ef type:MM_FILEPAGES val:33 [ 33.554354] BUG: Bad rss-counter state mm:00000000db7f75ef type:MM_ANONPAGES val:22 [ 33.926145] BUG: Bad rss-counter state mm:00000000ff98b628 type:MM_FILEPAGES val:33 [ 33.926856] BUG: Bad rss-counter state mm:00000000ff98b628 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22540' (ECDSA) to the list of known hosts. 2023/06/20 09:48:21 fuzzer started 2023/06/20 09:48:21 dialing manager at localhost:44161 2023/06/20 09:48:21 checking machine... 2023/06/20 09:48:21 checking revisions... [ 34.516766] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:48:21 testing simple program... [ 34.549472] cgroup: Unknown subsys name 'net' [ 34.589606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9c135e RDX=dffffc0000000000 RSI=ffffffff8661f0c8 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130706 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 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=00007f1dee55d010 CR3=0000000010346000 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=2612247af5c3c8b4da43416cac28f7df XMM02=000000000011d180eff9b2d0a8fce9cb XMM03=000000000011d2502c67c8bc2e329bc3 XMM04=47f2badc88b3df3a00000000000ae988 XMM05=4f91ca6af571db310000000000134fb0 XMM06=806171799158d9670000000000134050 XMM07=e042d86d42eb936e00000000001248d8 XMM08=ca2444b22b5fb8f0000000000011d250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000039500 RCX=0000000000000000 RDX=ffff888015ab3680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88806cf09d80 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffff888015ab3680 R13=ffff88806cf2c240 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff811283c2 RFL=00000082 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6216376900 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=00007f621643244c CR3=0000000017fae000 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=6720646572637465733a4d41503d706f 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