syzkaller login: [ 30.425337] BUG: Bad rss-counter state mm:00000000df785feb type:MM_FILEPAGES val:33 [ 30.426532] BUG: Bad rss-counter state mm:00000000df785feb type:MM_ANONPAGES val:22 [ 30.549754] ================================================================== [ 30.550388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.550987] Read of size 8 at addr ffff88801452eed8 by task sshd/221 [ 30.551484] [ 30.551626] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.552206] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.552802] Call Trace: [ 30.553004] [ 30.553186] dump_stack_lvl+0x91/0xf0 [ 30.553511] print_report+0xcc/0x620 [ 30.553826] ? __virt_addr_valid+0x102/0x340 [ 30.554181] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.554880] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.555262] kasan_report+0xbe/0xf0 [ 30.555565] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.555979] vma_interval_tree_remove+0xc75/0xec0 [ 30.556355] vma_prepare+0xc54/0x11a0 [ 30.556675] __split_vma+0x5af/0x950 [ 30.557005] ? __pfx___split_vma+0x10/0x10 [ 30.557361] ? find_held_lock+0x2c/0x110 [ 30.557703] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.558085] ? lock_is_held_type+0x9f/0x120 [ 30.558450] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.558845] ? mtree_range_walk+0x632/0x900 [ 30.559207] ? mas_walk+0x5c7/0x7c0 [ 30.559527] do_vmi_munmap+0x1f1/0x2b0 [ 30.559893] mmap_region+0x1f9/0x2660 [ 30.560193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.560525] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.560990] ? __pfx_lock_acquire+0x10/0x10 [ 30.561341] ? __pfx_mmap_region+0x10/0x10 [ 30.561690] ? security_mmap_addr+0x7d/0xa0 [ 30.562046] ? get_unmapped_area+0x1f5/0x3f0 [ 30.562391] do_mmap+0x854/0xf00 [ 30.562668] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.562984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.563358] ksys_mmap_pgoff+0x3af/0x500 [ 30.563694] do_syscall_64+0x3f/0x90 [ 30.564025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.564460] RIP: 0033:0x7fa4742e9d82 [ 30.564762] 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 [ 30.566105] RSP: 002b:00007ffea7661838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.566691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4742e9d82 [ 30.567231] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa473723000 [ 30.567832] RBP: 00007fa473723000 R08: 0000000000000009 R09: 0000000000001000 [ 30.568367] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ea03ccd90 [ 30.568888] R13: 00007ffea7661850 R14: 00007ffea7661880 R15: 00007ffea7661be0 [ 30.569487] [ 30.569677] [ 30.569818] Allocated by task 214: [ 30.570100] kasan_save_stack+0x22/0x50 [ 30.570448] kasan_set_track+0x25/0x30 [ 30.570764] __kasan_slab_alloc+0x59/0x70 [ 30.571089] kmem_cache_alloc+0x16b/0x370 [ 30.571403] vm_area_dup+0x20/0x160 [ 30.571696] __split_vma+0x170/0x950 [ 30.572050] split_vma+0xc6/0x110 [ 30.572348] mprotect_fixup+0x8d2/0xb30 [ 30.572655] do_mprotect_pkey+0x87e/0xd40 [ 30.572989] __x64_sys_mprotect+0x78/0xc0 [ 30.573344] do_syscall_64+0x3f/0x90 [ 30.573657] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.574060] [ 30.574198] Freed by task 203: [ 30.574447] kasan_save_stack+0x22/0x50 [ 30.574768] kasan_set_track+0x25/0x30 [ 30.575078] kasan_save_free_info+0x2b/0x50 [ 30.575404] __kasan_slab_free+0x10a/0x190 [ 30.575790] kmem_cache_free+0x10d/0x4d0 [ 30.576102] rcu_core+0x8c8/0x2860 [ 30.576379] __do_softirq+0x1b7/0x7d4 [ 30.576683] [ 30.576818] Last potentially related work creation: [ 30.577188] kasan_save_stack+0x22/0x50 [ 30.577516] __kasan_record_aux_stack+0x8e/0xa0 [ 30.577888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.578294] remove_vma+0x139/0x170 [ 30.578563] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.578899] do_vmi_munmap+0x1f1/0x2b0 [ 30.579189] __vm_munmap+0x138/0x3a0 [ 30.579477] __x64_sys_munmap+0x59/0x80 [ 30.579813] do_syscall_64+0x3f/0x90 [ 30.580125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.580528] [ 30.580658] The buggy address belongs to the object at ffff88801452ee80 [ 30.580658] which belongs to the cache vm_area_struct of size 168 [ 30.581575] The buggy address is located 88 bytes inside of [ 30.581575] freed 168-byte region [ffff88801452ee80, ffff88801452ef28) [ 30.582459] [ 30.582592] The buggy address belongs to the physical page: [ 30.582997] page:000000006378d52c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1452e [ 30.583661] memcg:ffff888016a8d301 [ 30.583973] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.584401] page_type: 0xffffffff() [ 30.584695] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.585324] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a8d301 [ 30.586029] page dumped because: kasan: bad access detected [ 30.586450] [ 30.586595] Memory state around the buggy address: [ 30.586970] ffff88801452ed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.587525] ffff88801452ee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.588218] >ffff88801452ee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.588763] ^ [ 30.589236] ffff88801452ef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.589839] ffff88801452ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.590376] ================================================================== [ 30.591186] Disabling lock debugging due to kernel taint [ 32.291293] BUG: Bad rss-counter state mm:000000004667402d type:MM_FILEPAGES val:33 [ 32.292016] BUG: Bad rss-counter state mm:000000004667402d type:MM_ANONPAGES val:22 [ 32.675307] BUG: Bad rss-counter state mm:00000000a9be7397 type:MM_FILEPAGES val:33 [ 32.676131] BUG: Bad rss-counter state mm:00000000a9be7397 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47838' (ECDSA) to the list of known hosts. 2023/06/21 08:57:37 fuzzer started 2023/06/21 08:57:37 dialing manager at localhost:36067 2023/06/21 08:57:37 checking machine... 2023/06/21 08:57:37 checking revisions... [ 33.274201] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:57:38 testing simple program... [ 33.322051] cgroup: Unknown subsys name 'net' [ 33.356084] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:57:37 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=00007f2fdbe53ca0 CR3=000000000a000000 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=58bfb375f9874a93354620e6bf94b6ac XMM02=000000000011abf8ec2efd57dc4c00df XMM03=0000000000122098d4a864bc97819b22 XMM04=10426aad6cd9237700000000000ae988 XMM05=e4cb8bb95a7664b60000000000131f10 XMM06=769d80da97ef1a5a0000000000130d78 XMM07=e042d86d42eb936e0000000000122318 XMM08=d4a864bc97819b22000000000011ac58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff8880099d9b40 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff844b7beb RDI=ffff8880099d9f34 RBP=dffffc0000000000 RSP=ffff888017c7fd58 R8 =0000000000000006 R9 =00007f34e92f1008 R10=ffffffffffffffff R11=0000000000000000 R12=0000000000000000 R13=ffff888017c7fe70 R14=ffffffffffffffff R15=1ffff11002f8ffaf RIP=ffffffff8135bd6b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f34e9331900 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=00007f34e92f1008 CR3=00000000097ec000 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