syzkaller login: [ 35.425265] BUG: Bad rss-counter state mm:00000000fe8023ec type:MM_FILEPAGES val:33 [ 35.426279] BUG: Bad rss-counter state mm:00000000fe8023ec type:MM_ANONPAGES val:22 [ 35.591832] ================================================================== [ 35.592758] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.593752] Read of size 8 at addr ffff88800e4dbed8 by task sshd/221 [ 35.594534] [ 35.594759] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.595789] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.596811] Call Trace: [ 35.597140] [ 35.597431] dump_stack_lvl+0x91/0xf0 [ 35.597946] print_report+0xcc/0x620 [ 35.598445] ? __virt_addr_valid+0x102/0x340 [ 35.599005] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.599646] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.600259] kasan_report+0xbe/0xf0 [ 35.600735] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.601383] vma_interval_tree_remove+0xc75/0xec0 [ 35.601994] vma_prepare+0xc54/0x11a0 [ 35.602478] __split_vma+0x5af/0x950 [ 35.602960] ? __pfx___split_vma+0x10/0x10 [ 35.603494] ? find_held_lock+0x2c/0x110 [ 35.604023] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.604592] ? lock_is_held_type+0x9f/0x120 [ 35.605169] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.605783] ? mtree_range_walk+0x632/0x900 [ 35.606350] ? mas_walk+0x5c7/0x7c0 [ 35.606837] do_vmi_munmap+0x1f1/0x2b0 [ 35.607333] mmap_region+0x1f9/0x2660 [ 35.607831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.608339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.609077] ? __pfx_lock_acquire+0x10/0x10 [ 35.609625] ? __pfx_mmap_region+0x10/0x10 [ 35.610152] ? security_mmap_addr+0x7d/0xa0 [ 35.610690] ? get_unmapped_area+0x1f5/0x3f0 [ 35.611254] do_mmap+0x854/0xf00 [ 35.611702] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.612207] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.612774] ksys_mmap_pgoff+0x3af/0x500 [ 35.613320] do_syscall_64+0x3f/0x90 [ 35.613811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.614469] RIP: 0033:0x7f09f07f2d82 [ 35.614935] 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 [ 35.617077] RSP: 002b:00007ffe50f55258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.617980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09f07f2d82 [ 35.618854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09efc2c000 [ 35.619716] RBP: 00007f09efc2c000 R08: 0000000000000009 R09: 0000000000001000 [ 35.620568] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3c703dec0 [ 35.621452] R13: 00007ffe50f55270 R14: 00007ffe50f552a0 R15: 00007ffe50f55600 [ 35.622331] [ 35.622628] [ 35.622844] Allocated by task 214: [ 35.623281] kasan_save_stack+0x22/0x50 [ 35.623799] kasan_set_track+0x25/0x30 [ 35.624295] __kasan_slab_alloc+0x59/0x70 [ 35.624848] kmem_cache_alloc+0x16b/0x370 [ 35.625364] vm_area_dup+0x20/0x160 [ 35.625825] __split_vma+0x170/0x950 [ 35.626292] split_vma+0xc6/0x110 [ 35.626727] mprotect_fixup+0x8d2/0xb30 [ 35.627229] do_mprotect_pkey+0x87e/0xd40 [ 35.627747] __x64_sys_mprotect+0x78/0xc0 [ 35.628266] do_syscall_64+0x3f/0x90 [ 35.628743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.629396] [ 35.629608] Freed by task 214: [ 35.629997] kasan_save_stack+0x22/0x50 [ 35.630503] kasan_set_track+0x25/0x30 [ 35.630992] kasan_save_free_info+0x2b/0x50 [ 35.631535] __kasan_slab_free+0x10a/0x190 [ 35.632071] kmem_cache_free+0x10d/0x4d0 [ 35.632581] rcu_core+0x8c8/0x2860 [ 35.633054] __do_softirq+0x1b7/0x7d4 [ 35.633532] [ 35.633747] Last potentially related work creation: [ 35.634327] kasan_save_stack+0x22/0x50 [ 35.634826] __kasan_record_aux_stack+0x8e/0xa0 [ 35.635405] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.636052] remove_vma+0x139/0x170 [ 35.636502] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.637158] do_vmi_munmap+0x1f1/0x2b0 [ 35.637661] __vm_munmap+0x138/0x3a0 [ 35.638130] __x64_sys_munmap+0x59/0x80 [ 35.638627] do_syscall_64+0x3f/0x90 [ 35.639111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.639765] [ 35.639982] The buggy address belongs to the object at ffff88800e4dbe80 [ 35.639982] which belongs to the cache vm_area_struct of size 168 [ 35.641460] The buggy address is located 88 bytes inside of [ 35.641460] freed 168-byte region [ffff88800e4dbe80, ffff88800e4dbf28) [ 35.642873] [ 35.643098] The buggy address belongs to the physical page: [ 35.643766] page:00000000fd7b535e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4db [ 35.644878] memcg:ffff888018e96b01 [ 35.645315] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.645967] page_type: 0xffffffff() [ 35.646428] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.647363] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e96b01 [ 35.648274] page dumped because: kasan: bad access detected [ 35.648956] [ 35.649174] Memory state around the buggy address: [ 35.649757] ffff88800e4dbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.650614] ffff88800e4dbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 35.651470] >ffff88800e4dbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.652329] ^ [ 35.653075] ffff88800e4dbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 35.653940] ffff88800e4dbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.654783] ================================================================== [ 35.655784] Disabling lock debugging due to kernel taint [ 38.521578] BUG: Bad rss-counter state mm:00000000f314c9f0 type:MM_FILEPAGES val:33 [ 38.522735] BUG: Bad rss-counter state mm:00000000f314c9f0 type:MM_ANONPAGES val:22 [ 39.043207] BUG: Bad rss-counter state mm:0000000011331d43 type:MM_FILEPAGES val:33 [ 39.044385] BUG: Bad rss-counter state mm:0000000011331d43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3031' (ECDSA) to the list of known hosts. 2023/06/19 17:21:33 fuzzer started 2023/06/19 17:21:34 dialing manager at localhost:44161 2023/06/19 17:21:34 checking machine... 2023/06/19 17:21:34 checking revisions... [ 39.690496] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:21:34 testing simple program... [ 39.734736] cgroup: Unknown subsys name 'net' [ 39.782655] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:29 Registers: info registers vcpu 0 RAX=0000000080010000 RBX=0000000000039500 RCX=0000000000000000 RDX=ffff88800fcb1b40 RSI=ffffffff8124f51f RDI=ffff88806ce39ed8 RBP=ffff88806ce09dc8 RSP=ffff88806ce09d88 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=000000178b900fa4 R12=ffff88806ce39500 R13=0000000000000000 R14=0000000000000000 R15=ffff88800fcb1b40 RIP=ffffffff8124f524 RFL=00000046 [---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 00007f5c22e4c900 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=00007ffd32e7e000 CR3=0000000009578000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f9bd30adb50 CR3=0000000008dca000 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=2033333a31323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a31323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000