syzkaller login: [ 30.701355] BUG: Bad rss-counter state mm:00000000d25bb6a1 type:MM_FILEPAGES val:33 [ 30.702619] BUG: Bad rss-counter state mm:00000000d25bb6a1 type:MM_ANONPAGES val:22 [ 30.866932] ================================================================== [ 30.867849] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.868918] Read of size 8 at addr ffff888019d19c20 by task sshd/219 [ 30.869691] [ 30.869921] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.870797] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.871798] Call Trace: [ 30.872119] [ 30.872401] dump_stack_lvl+0x91/0xf0 [ 30.872897] print_report+0xcc/0x620 [ 30.873379] ? __virt_addr_valid+0x102/0x340 [ 30.873945] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.874568] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875188] kasan_report+0xbe/0xf0 [ 30.875668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876289] vma_interval_tree_remove+0xc75/0xec0 [ 30.876890] vma_prepare+0xc54/0x11a0 [ 30.877388] __split_vma+0x5af/0x950 [ 30.877866] ? __pfx___split_vma+0x10/0x10 [ 30.878426] ? find_held_lock+0x2c/0x110 [ 30.878963] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.879594] ? lock_is_held_type+0x9f/0x120 [ 30.880150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.880756] ? mtree_range_walk+0x632/0x900 [ 30.881313] ? mas_walk+0x5c7/0x7c0 [ 30.881788] do_vmi_munmap+0x1f1/0x2b0 [ 30.882297] mmap_region+0x1f9/0x2660 [ 30.882780] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.883294] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.884012] ? __pfx_lock_acquire+0x10/0x10 [ 30.884542] ? __pfx_mmap_region+0x10/0x10 [ 30.885073] ? security_mmap_addr+0x7d/0xa0 [ 30.885602] ? get_unmapped_area+0x1f5/0x3f0 [ 30.886157] do_mmap+0x854/0xf00 [ 30.886594] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.887087] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.887648] ksys_mmap_pgoff+0x3af/0x500 [ 30.888157] do_syscall_64+0x3f/0x90 [ 30.888640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889294] RIP: 0033:0x7fdb1c7b5d82 [ 30.889750] 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 [ 30.891917] RSP: 002b:00007ffea253bf88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.892824] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdb1c7b5d82 [ 30.893661] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdb1bbef000 [ 30.894506] RBP: 00007fdb1bbef000 R08: 0000000000000009 R09: 0000000000001000 [ 30.895347] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff0de93ec0 [ 30.896191] R13: 00007ffea253bfa0 R14: 00007ffea253bfd0 R15: 00007ffea253c330 [ 30.897042] [ 30.897334] [ 30.897547] Allocated by task 212: [ 30.897980] kasan_save_stack+0x22/0x50 [ 30.898485] kasan_set_track+0x25/0x30 [ 30.898979] __kasan_slab_alloc+0x59/0x70 [ 30.899505] kmem_cache_alloc+0x16b/0x370 [ 30.900022] vm_area_dup+0x20/0x160 [ 30.900479] __split_vma+0x170/0x950 [ 30.900943] split_vma+0xc6/0x110 [ 30.901379] mprotect_fixup+0x8d2/0xb30 [ 30.901874] do_mprotect_pkey+0x87e/0xd40 [ 30.902411] __x64_sys_mprotect+0x78/0xc0 [ 30.902925] do_syscall_64+0x3f/0x90 [ 30.903401] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.904037] [ 30.904251] Freed by task 212: [ 30.904656] kasan_save_stack+0x22/0x50 [ 30.905157] kasan_set_track+0x25/0x30 [ 30.905647] kasan_save_free_info+0x2b/0x50 [ 30.906178] __kasan_slab_free+0x10a/0x190 [ 30.906705] kmem_cache_free+0x10d/0x4d0 [ 30.907208] rcu_core+0x8c8/0x2860 [ 30.907651] __do_softirq+0x1b7/0x7d4 [ 30.908128] [ 30.908341] Last potentially related work creation: [ 30.908923] kasan_save_stack+0x22/0x50 [ 30.909427] __kasan_record_aux_stack+0x8e/0xa0 [ 30.910002] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.910641] remove_vma+0x139/0x170 [ 30.911091] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.911643] do_vmi_munmap+0x1f1/0x2b0 [ 30.912125] __vm_munmap+0x138/0x3a0 [ 30.912593] __x64_sys_munmap+0x59/0x80 [ 30.913086] do_syscall_64+0x3f/0x90 [ 30.913557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.914218] [ 30.914432] The buggy address belongs to the object at ffff888019d19bc8 [ 30.914432] which belongs to the cache vm_area_struct of size 168 [ 30.915894] The buggy address is located 88 bytes inside of [ 30.915894] freed 168-byte region [ffff888019d19bc8, ffff888019d19c70) [ 30.917293] [ 30.917509] The buggy address belongs to the physical page: [ 30.918172] page:000000001b001b1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d19 [ 30.919262] memcg:ffff88800cd8d501 [ 30.919715] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.920371] page_type: 0xffffffff() [ 30.920828] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.921746] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cd8d501 [ 30.922675] page dumped because: kasan: bad access detected [ 30.923343] [ 30.923560] Memory state around the buggy address: [ 30.924149] ffff888019d19b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.925004] ffff888019d19b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.925860] >ffff888019d19c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.926747] ^ [ 30.927299] ffff888019d19c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.928208] ffff888019d19d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.929075] ================================================================== [ 30.930098] Disabling lock debugging due to kernel taint [ 33.273559] BUG: Bad rss-counter state mm:00000000d2b8a3fc type:MM_FILEPAGES val:32 [ 33.274552] BUG: Bad rss-counter state mm:00000000d2b8a3fc type:MM_ANONPAGES val:22 [ 33.791990] BUG: Bad rss-counter state mm:000000007f4fa123 type:MM_FILEPAGES val:33 [ 33.793902] BUG: Bad rss-counter state mm:000000007f4fa123 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46436' (ECDSA) to the list of known hosts. 2023/06/20 11:37:51 fuzzer started 2023/06/20 11:37:51 dialing manager at localhost:36067 2023/06/20 11:37:51 checking machine... 2023/06/20 11:37:51 checking revisions... [ 34.514760] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:37:51 testing simple program... [ 34.554320] cgroup: Unknown subsys name 'net' [ 34.618130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:37:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffe26929150 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=ffffffff85830480 RBP=ffff88800f727d98 RSP=ffff88800f727aa8 R8 =0000000000000001 R9 =0000000000000005 R10=0000000000000005 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88800f727d90 R14=0000000000000090 R15=ffff88800f727d90 RIP=ffffffff82244744 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 00007f5c524d7900 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=00007ffe2692a000 CR3=000000000f0ac000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007efd9a521000 CR3=000000000c5ca000 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=2031353a37333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a37333a3131203032 XMM08=00007fd8d401d5600000004f00000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000