syzkaller login: [ 39.131858] BUG: Bad rss-counter state mm:00000000b2e183b6 type:MM_FILEPAGES val:33 [ 39.133129] BUG: Bad rss-counter state mm:00000000b2e183b6 type:MM_ANONPAGES val:22 [ 39.265622] ================================================================== [ 39.266338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.267065] Read of size 8 at addr ffff888016b9cd08 by task sshd/220 [ 39.267647] [ 39.267817] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.268480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.269235] Call Trace: [ 39.269477] [ 39.269706] dump_stack_lvl+0x91/0xf0 [ 39.270173] print_report+0xcc/0x620 [ 39.270558] ? __virt_addr_valid+0x102/0x340 [ 39.270985] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.271464] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.271947] kasan_report+0xbe/0xf0 [ 39.272328] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.272804] vma_interval_tree_remove+0xc75/0xec0 [ 39.273263] vma_prepare+0xc54/0x11a0 [ 39.273631] __split_vma+0x5af/0x950 [ 39.273990] ? __pfx___split_vma+0x10/0x10 [ 39.274419] ? find_held_lock+0x2c/0x110 [ 39.274830] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.275266] ? lock_is_held_type+0x9f/0x120 [ 39.275687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.276160] ? mtree_range_walk+0x632/0x900 [ 39.276585] ? mas_walk+0x5c7/0x7c0 [ 39.276950] do_vmi_munmap+0x1f1/0x2b0 [ 39.277333] mmap_region+0x1f9/0x2660 [ 39.277706] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.278114] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.278668] ? __pfx_lock_acquire+0x10/0x10 [ 39.279085] ? __pfx_mmap_region+0x10/0x10 [ 39.279495] ? security_mmap_addr+0x7d/0xa0 [ 39.279916] ? get_unmapped_area+0x1f5/0x3f0 [ 39.280339] do_mmap+0x854/0xf00 [ 39.280677] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.281061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.281498] ksys_mmap_pgoff+0x3af/0x500 [ 39.281889] do_syscall_64+0x3f/0x90 [ 39.282259] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.282758] RIP: 0033:0x7fc4f4043d82 [ 39.283111] 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 [ 39.284766] RSP: 002b:00007ffeb3a691c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.285468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4f4043d82 [ 39.286143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4f347d000 [ 39.286807] RBP: 00007fc4f347d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.287458] R10: 0000000000000812 R11: 0000000000000206 R12: 000055804fe6eec0 [ 39.288112] R13: 00007ffeb3a691e0 R14: 00007ffeb3a69210 R15: 00007ffeb3a69570 [ 39.288778] [ 39.289002] [ 39.289168] Allocated by task 213: [ 39.289506] kasan_save_stack+0x22/0x50 [ 39.289895] kasan_set_track+0x25/0x30 [ 39.290277] __kasan_slab_alloc+0x59/0x70 [ 39.290687] kmem_cache_alloc+0x16b/0x370 [ 39.291083] vm_area_dup+0x20/0x160 [ 39.291442] __split_vma+0x170/0x950 [ 39.291805] split_vma+0xc6/0x110 [ 39.292143] mprotect_fixup+0x8d2/0xb30 [ 39.292530] do_mprotect_pkey+0x87e/0xd40 [ 39.292932] __x64_sys_mprotect+0x78/0xc0 [ 39.293333] do_syscall_64+0x3f/0x90 [ 39.293696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.294202] [ 39.294370] Freed by task 13: [ 39.294666] kasan_save_stack+0x22/0x50 [ 39.295056] kasan_set_track+0x25/0x30 [ 39.295437] kasan_save_free_info+0x2b/0x50 [ 39.295852] __kasan_slab_free+0x10a/0x190 [ 39.296266] kmem_cache_free+0x10d/0x4d0 [ 39.296661] rcu_core+0x8c8/0x2860 [ 39.296998] __do_softirq+0x1b7/0x7d4 [ 39.297367] [ 39.297531] Last potentially related work creation: [ 39.297986] kasan_save_stack+0x22/0x50 [ 39.298381] __kasan_record_aux_stack+0x8e/0xa0 [ 39.298827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.299324] remove_vma+0x139/0x170 [ 39.299669] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.300102] do_vmi_munmap+0x1f1/0x2b0 [ 39.300481] __vm_munmap+0x138/0x3a0 [ 39.300843] __x64_sys_munmap+0x59/0x80 [ 39.301229] do_syscall_64+0x3f/0x90 [ 39.301596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.302106] [ 39.302275] The buggy address belongs to the object at ffff888016b9ccb0 [ 39.302275] which belongs to the cache vm_area_struct of size 168 [ 39.303427] The buggy address is located 88 bytes inside of [ 39.303427] freed 168-byte region [ffff888016b9ccb0, ffff888016b9cd58) [ 39.304516] [ 39.304683] The buggy address belongs to the physical page: [ 39.305199] page:000000006817744d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b9c [ 39.306046] memcg:ffff888016b9b101 [ 39.306379] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.306881] page_type: 0xffffffff() [ 39.307230] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.307953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b9b101 [ 39.308660] page dumped because: kasan: bad access detected [ 39.309173] [ 39.309340] Memory state around the buggy address: [ 39.309797] ffff888016b9cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.310477] ffff888016b9cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.311144] >ffff888016b9cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.311805] ^ [ 39.312140] ffff888016b9cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.312803] ffff888016b9ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.313467] ================================================================== [ 39.314316] Disabling lock debugging due to kernel taint [ 41.276112] BUG: Bad rss-counter state mm:00000000783114e7 type:MM_FILEPAGES val:33 [ 41.276885] BUG: Bad rss-counter state mm:00000000783114e7 type:MM_ANONPAGES val:22 [ 41.713269] BUG: Bad rss-counter state mm:000000004cb86828 type:MM_FILEPAGES val:33 [ 41.714042] BUG: Bad rss-counter state mm:000000004cb86828 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58143' (ECDSA) to the list of known hosts. 2023/06/20 03:10:32 fuzzer started 2023/06/20 03:10:33 dialing manager at localhost:44161 2023/06/20 03:10:33 checking machine... 2023/06/20 03:10:33 checking revisions... [ 42.378945] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:10:33 testing simple program... [ 42.427278] cgroup: Unknown subsys name 'net' [ 42.479129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:10:23 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff11003379e66 RSI=ffffffff8180c522 RDI=ffff888019bcf3a0 RBP=ffff888019bcf370 RSP=ffff888019bcf2d0 R8 =ffffffff860d68fa R9 =ffff888019bcf318 R10=0000000000038001 R11=0000000000010b7e R12=ffff888019bcf3a0 R13=0000000000000000 R14=ffff8880146451c0 R15=00000000000928c0 RIP=ffffffff813ad424 RFL=00000286 [--S--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 00007f52622f6900 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=00007f52628ad618 CR3=000000001c91e000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007f4fe10e45e0 CR3=000000000dc78000 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=2032333a30313a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000