syzkaller login: [ 30.722203] BUG: Bad rss-counter state mm:000000005c4a99b4 type:MM_FILEPAGES val:33 [ 30.723435] BUG: Bad rss-counter state mm:000000005c4a99b4 type:MM_ANONPAGES val:22 [ 30.868062] ================================================================== [ 30.868948] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.869872] Read of size 8 at addr ffff888016cf0df0 by task sshd/220 [ 30.870634] [ 30.870852] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.871894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.872863] Call Trace: [ 30.873188] [ 30.873477] dump_stack_lvl+0x91/0xf0 [ 30.873964] print_report+0xcc/0x620 [ 30.874444] ? __virt_addr_valid+0x102/0x340 [ 30.875015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.875657] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.876392] kasan_report+0xbe/0xf0 [ 30.877002] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.877814] vma_interval_tree_remove+0xc75/0xec0 [ 30.878601] vma_prepare+0xc54/0x11a0 [ 30.879222] __split_vma+0x5af/0x950 [ 30.879770] ? __pfx___split_vma+0x10/0x10 [ 30.880351] ? find_held_lock+0x2c/0x110 [ 30.880882] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.881479] ? lock_is_held_type+0x9f/0x120 [ 30.882051] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.882729] ? mtree_range_walk+0x632/0x900 [ 30.883308] ? mas_walk+0x5c7/0x7c0 [ 30.883793] do_vmi_munmap+0x1f1/0x2b0 [ 30.884334] mmap_region+0x1f9/0x2660 [ 30.884820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.885336] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.886070] ? __pfx_lock_acquire+0x10/0x10 [ 30.886629] ? __pfx_mmap_region+0x10/0x10 [ 30.887173] ? security_mmap_addr+0x7d/0xa0 [ 30.887704] ? get_unmapped_area+0x1f5/0x3f0 [ 30.888260] do_mmap+0x854/0xf00 [ 30.888716] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.889229] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.889808] ksys_mmap_pgoff+0x3af/0x500 [ 30.890321] do_syscall_64+0x3f/0x90 [ 30.890819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.891477] RIP: 0033:0x7ffafd8f1d82 [ 30.891940] 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 [ 30.894077] RSP: 002b:00007ffe0419a098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.894995] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffafd8f1d82 [ 30.895872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffafcd2b000 [ 30.896732] RBP: 00007ffafcd2b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.897631] R10: 0000000000000812 R11: 0000000000000206 R12: 00005629922c5d90 [ 30.898526] R13: 00007ffe0419a0b0 R14: 00007ffe0419a0e0 R15: 00007ffe0419a440 [ 30.899426] [ 30.899732] [ 30.899958] Allocated by task 213: [ 30.900401] kasan_save_stack+0x22/0x50 [ 30.900915] kasan_set_track+0x25/0x30 [ 30.901446] __kasan_slab_alloc+0x59/0x70 [ 30.901996] kmem_cache_alloc+0x16b/0x370 [ 30.902575] vm_area_dup+0x20/0x160 [ 30.903081] __split_vma+0x170/0x950 [ 30.903552] split_vma+0xc6/0x110 [ 30.904009] mprotect_fixup+0x8d2/0xb30 [ 30.904525] do_mprotect_pkey+0x87e/0xd40 [ 30.905069] __x64_sys_mprotect+0x78/0xc0 [ 30.905604] do_syscall_64+0x3f/0x90 [ 30.906118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.906791] [ 30.907013] Freed by task 213: [ 30.907434] kasan_save_stack+0x22/0x50 [ 30.907955] kasan_set_track+0x25/0x30 [ 30.908464] kasan_save_free_info+0x2b/0x50 [ 30.909011] __kasan_slab_free+0x10a/0x190 [ 30.909548] kmem_cache_free+0x10d/0x4d0 [ 30.910063] rcu_core+0x8c8/0x2860 [ 30.910519] __do_softirq+0x1b7/0x7d4 [ 30.911008] [ 30.911232] Last potentially related work creation: [ 30.911828] kasan_save_stack+0x22/0x50 [ 30.912338] __kasan_record_aux_stack+0x8e/0xa0 [ 30.913012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.913664] remove_vma+0x139/0x170 [ 30.914120] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.914708] do_vmi_munmap+0x1f1/0x2b0 [ 30.915204] __vm_munmap+0x138/0x3a0 [ 30.915676] __x64_sys_munmap+0x59/0x80 [ 30.916179] do_syscall_64+0x3f/0x90 [ 30.916656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.917308] [ 30.917527] The buggy address belongs to the object at ffff888016cf0d98 [ 30.917527] which belongs to the cache vm_area_struct of size 168 [ 30.919052] The buggy address is located 88 bytes inside of [ 30.919052] freed 168-byte region [ffff888016cf0d98, ffff888016cf0e40) [ 30.920487] [ 30.920710] The buggy address belongs to the physical page: [ 30.921387] page:0000000045ae065e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16cf0 [ 30.922510] memcg:ffff888016cf1001 [ 30.922962] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.923616] page_type: 0xffffffff() [ 30.924071] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.925002] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016cf1001 [ 30.925918] page dumped because: kasan: bad access detected [ 30.926611] [ 30.926830] Memory state around the buggy address: [ 30.927416] ffff888016cf0c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.928293] ffff888016cf0d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.929173] >ffff888016cf0d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.930060] ^ [ 30.930901] ffff888016cf0e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.931773] ffff888016cf0e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.932659] ================================================================== [ 30.933675] Disabling lock debugging due to kernel taint [ 33.129510] BUG: Bad rss-counter state mm:0000000019b95517 type:MM_FILEPAGES val:33 [ 33.130725] BUG: Bad rss-counter state mm:0000000019b95517 type:MM_ANONPAGES val:22 [ 33.535951] BUG: Bad rss-counter state mm:00000000dbc1830b type:MM_FILEPAGES val:33 [ 33.537177] BUG: Bad rss-counter state mm:00000000dbc1830b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49897' (ECDSA) to the list of known hosts. 2023/06/20 03:54:09 fuzzer started 2023/06/20 03:54:10 dialing manager at localhost:44161 2023/06/20 03:54:10 checking machine... 2023/06/20 03:54:10 checking revisions... [ 34.237704] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:54:10 testing simple program... [ 34.287446] cgroup: Unknown subsys name 'net' [ 34.326970] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:54:09 Registers: info registers vcpu 0 RAX=0000000000000021 RBX=ffffed100d9c1368 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3bed0 RBP=ffffffff813782a8 RSP=ffff88806ce09b40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880087b0500 R14=ffffffff813782a8 R15=ffff88800e811da8 RIP=ffffffff813ad6f0 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 00007fa13a55c900 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=00007ffd6a30e000 CR3=000000000f2de000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fddc5456050 CR3=000000000d958000 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=75e8237f13c2ea87364c158493681ea0 XMM02=000000000011be18eff9b2d0a8fce9cb XMM03=000000000011bee82c67c8bc2e329bc3 XMM04=2b52c5c2ae47aa1d00000000000ae988 XMM05=19e9129bd510f23500000000001332a0 XMM06=b611166142cf32880000000000132108 XMM07=e042d86d42eb936e0000000000123978 XMM08=4ab2e2efed67fcc6000000000011bee8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000