syzkaller login: [ 50.470097] BUG: Bad rss-counter state mm:00000000424d98b4 type:MM_FILEPAGES val:33 [ 50.470789] BUG: Bad rss-counter state mm:00000000424d98b4 type:MM_ANONPAGES val:22 [ 50.581768] ================================================================== [ 50.582850] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.583881] Read of size 8 at addr ffff8880173e5d08 by task sshd/220 [ 50.584420] [ 50.584578] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.585184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.585876] Call Trace: [ 50.586105] [ 50.586307] dump_stack_lvl+0x91/0xf0 [ 50.586650] print_report+0xcc/0x620 [ 50.587007] ? __virt_addr_valid+0x102/0x340 [ 50.587398] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.587840] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.588277] kasan_report+0xbe/0xf0 [ 50.588616] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.589053] vma_interval_tree_remove+0xc75/0xec0 [ 50.589478] vma_prepare+0xc54/0x11a0 [ 50.589815] __split_vma+0x5af/0x950 [ 50.590152] ? __pfx___split_vma+0x10/0x10 [ 50.590528] ? find_held_lock+0x2c/0x110 [ 50.590908] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.591309] ? lock_is_held_type+0x9f/0x120 [ 50.591690] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.592115] ? mtree_range_walk+0x632/0x900 [ 50.592505] ? mas_walk+0x5c7/0x7c0 [ 50.592837] do_vmi_munmap+0x1f1/0x2b0 [ 50.593187] mmap_region+0x1f9/0x2660 [ 50.593529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.593889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.594394] ? __pfx_lock_acquire+0x10/0x10 [ 50.594772] ? __pfx_mmap_region+0x10/0x10 [ 50.595163] ? security_mmap_addr+0x7d/0xa0 [ 50.595571] ? get_unmapped_area+0x1f5/0x3f0 [ 50.595956] do_mmap+0x854/0xf00 [ 50.596187] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.596453] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.596752] ksys_mmap_pgoff+0x3af/0x500 [ 50.597022] do_syscall_64+0x3f/0x90 [ 50.597275] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.597622] RIP: 0033:0x7f8e3f174d82 [ 50.597864] 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 [ 50.598982] RSP: 002b:00007ffe00018638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.599458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e3f174d82 [ 50.599903] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e3e5ae000 [ 50.600347] RBP: 00007f8e3e5ae000 R08: 0000000000000009 R09: 0000000000001000 [ 50.600792] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605ff2a1f70 [ 50.601235] R13: 00007ffe00018650 R14: 00007ffe00018680 R15: 00007ffe000189e0 [ 50.601684] [ 50.601844] [ 50.601959] Allocated by task 213: [ 50.602186] kasan_save_stack+0x22/0x50 [ 50.602452] kasan_set_track+0x25/0x30 [ 50.602713] __kasan_slab_alloc+0x59/0x70 [ 50.603003] kmem_cache_alloc+0x16b/0x370 [ 50.603278] vm_area_dup+0x20/0x160 [ 50.603517] __split_vma+0x170/0x950 [ 50.603767] split_vma+0xc6/0x110 [ 50.604002] mprotect_fixup+0x8d2/0xb30 [ 50.604270] do_mprotect_pkey+0x87e/0xd40 [ 50.604547] __x64_sys_mprotect+0x78/0xc0 [ 50.604823] do_syscall_64+0x3f/0x90 [ 50.605073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.605410] [ 50.605524] Freed by task 0: [ 50.605723] kasan_save_stack+0x22/0x50 [ 50.605987] kasan_set_track+0x25/0x30 [ 50.606247] kasan_save_free_info+0x2b/0x50 [ 50.606528] __kasan_slab_free+0x10a/0x190 [ 50.606815] kmem_cache_free+0x10d/0x4d0 [ 50.607094] rcu_core+0x8c8/0x2860 [ 50.607328] __do_softirq+0x1b7/0x7d4 [ 50.607583] [ 50.607697] Last potentially related work creation: [ 50.608006] kasan_save_stack+0x22/0x50 [ 50.608273] __kasan_record_aux_stack+0x8e/0xa0 [ 50.608576] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.608917] remove_vma+0x139/0x170 [ 50.609155] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.609454] do_vmi_munmap+0x1f1/0x2b0 [ 50.609713] __vm_munmap+0x138/0x3a0 [ 50.609961] __x64_sys_munmap+0x59/0x80 [ 50.610224] do_syscall_64+0x3f/0x90 [ 50.610476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.610813] [ 50.610935] The buggy address belongs to the object at ffff8880173e5cb0 [ 50.610935] which belongs to the cache vm_area_struct of size 168 [ 50.611704] The buggy address is located 88 bytes inside of [ 50.611704] freed 168-byte region [ffff8880173e5cb0, ffff8880173e5d58) [ 50.612435] [ 50.612549] The buggy address belongs to the physical page: [ 50.612893] page:000000002df75922 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x173e5 [ 50.613464] memcg:ffff8880102bfb01 [ 50.613687] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.614035] page_type: 0xffffffff() [ 50.614275] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.614758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102bfb01 [ 50.615247] page dumped because: kasan: bad access detected [ 50.615593] [ 50.615706] Memory state around the buggy address: [ 50.616015] ffff8880173e5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 50.616459] ffff8880173e5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 50.616942] >ffff8880173e5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 50.617387] ^ [ 50.617614] ffff8880173e5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 50.618059] ffff8880173e5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 50.618498] ================================================================== [ 50.619089] Disabling lock debugging due to kernel taint [ 53.289579] BUG: Bad rss-counter state mm:000000000736c049 type:MM_FILEPAGES val:33 [ 53.291141] BUG: Bad rss-counter state mm:000000000736c049 type:MM_ANONPAGES val:22 [ 53.877610] BUG: Bad rss-counter state mm:000000003ed66ded type:MM_FILEPAGES val:33 [ 53.878592] BUG: Bad rss-counter state mm:000000003ed66ded type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56386' (ECDSA) to the list of known hosts. 2023/06/19 19:37:20 fuzzer started 2023/06/19 19:37:20 dialing manager at localhost:44161 2023/06/19 19:37:20 checking machine... 2023/06/19 19:37:20 checking revisions... [ 54.562765] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:37:20 testing simple program... [ 54.610301] cgroup: Unknown subsys name 'net' [ 54.661721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:37:00 Registers: info registers vcpu 0 RAX=000000000000001c RBX=1ffff11001eefedd RCX=ffffffff81c5f4a3 RDX=0000000000000000 RSI=000000000000001c RDI=0000000000001000 RBP=ffff88800ff26000 RSP=ffff88800f77f6b0 R8 =0000000000000001 R9 =ffffed1002bba93a R10=ffff888015dd49d7 R11=00000000000b6996 R12=0000000000000003 R13=ffff888015dd4900 R14=0000000000000000 R15=0000000000001000 RIP=ffffffff814c02c8 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 00007fdb25781700 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=00007fe0e598e000 CR3=000000000dd58000 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=2039313a37333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a37333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800d78ea00 RCX=ffffffff811fbfaa RDX=ffff88800fe49b40 RSI=0000000000000008 RDI=ffff88800fe49b40 RBP=ffff88800fe49b40 RSP=ffff888018f87e08 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=1ffff110031f0fc5 R15=0000000000000000 RIP=ffffffff8180fd58 RFL=00000293 [--S-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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9cc0f8c900 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=00007ffce2809000 CR3=000000001ca36000 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