syzkaller login: [ 36.109516] BUG: Bad rss-counter state mm:00000000ed81ccf0 type:MM_FILEPAGES val:33 [ 36.110764] BUG: Bad rss-counter state mm:00000000ed81ccf0 type:MM_ANONPAGES val:22 [ 36.273442] ================================================================== [ 36.274405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.275355] Read of size 8 at addr ffff888018cc9a50 by task sshd/219 [ 36.276275] [ 36.276500] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.277373] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.278385] Call Trace: [ 36.278712] [ 36.278999] dump_stack_lvl+0x91/0xf0 [ 36.279499] print_report+0xcc/0x620 [ 36.279991] ? __virt_addr_valid+0x102/0x340 [ 36.280548] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.281162] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.281793] kasan_report+0xbe/0xf0 [ 36.282273] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.282924] vma_interval_tree_remove+0xc75/0xec0 [ 36.283531] vma_prepare+0xc54/0x11a0 [ 36.284023] __split_vma+0x5af/0x950 [ 36.284501] ? __pfx___split_vma+0x10/0x10 [ 36.285037] ? find_held_lock+0x2c/0x110 [ 36.285566] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.286144] ? lock_is_held_type+0x9f/0x120 [ 36.286695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.287306] ? mtree_range_walk+0x632/0x900 [ 36.287873] ? mas_walk+0x5c7/0x7c0 [ 36.288357] do_vmi_munmap+0x1f1/0x2b0 [ 36.288854] mmap_region+0x1f9/0x2660 [ 36.289349] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.289868] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.290603] ? __pfx_lock_acquire+0x10/0x10 [ 36.291141] ? __pfx_mmap_region+0x10/0x10 [ 36.291680] ? security_mmap_addr+0x7d/0xa0 [ 36.292223] ? get_unmapped_area+0x1f5/0x3f0 [ 36.292784] do_mmap+0x854/0xf00 [ 36.293246] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.293746] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.294335] ksys_mmap_pgoff+0x3af/0x500 [ 36.294857] do_syscall_64+0x3f/0x90 [ 36.295343] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.296000] RIP: 0033:0x7fc89ba4ed82 [ 36.296464] 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 [ 36.298629] RSP: 002b:00007ffc59289918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.299552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc89ba4ed82 [ 36.300417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc89ae88000 [ 36.301286] RBP: 00007fc89ae88000 R08: 0000000000000009 R09: 0000000000001000 [ 36.302146] R10: 0000000000000812 R11: 0000000000000206 R12: 000055acb5d60ec0 [ 36.303023] R13: 00007ffc59289930 R14: 00007ffc59289960 R15: 00007ffc59289cc0 [ 36.303888] [ 36.304177] [ 36.304390] Allocated by task 212: [ 36.304834] kasan_save_stack+0x22/0x50 [ 36.305348] kasan_set_track+0x25/0x30 [ 36.305843] __kasan_slab_alloc+0x59/0x70 [ 36.306372] kmem_cache_alloc+0x16b/0x370 [ 36.306907] vm_area_dup+0x20/0x160 [ 36.307357] __split_vma+0x170/0x950 [ 36.307836] split_vma+0xc6/0x110 [ 36.308276] mprotect_fixup+0x8d2/0xb30 [ 36.308777] do_mprotect_pkey+0x87e/0xd40 [ 36.309307] __x64_sys_mprotect+0x78/0xc0 [ 36.309835] do_syscall_64+0x3f/0x90 [ 36.310327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.310988] [ 36.311209] Freed by task 212: [ 36.311607] kasan_save_stack+0x22/0x50 [ 36.312128] kasan_set_track+0x25/0x30 [ 36.312629] kasan_save_free_info+0x2b/0x50 [ 36.313176] __kasan_slab_free+0x10a/0x190 [ 36.313722] kmem_cache_free+0x10d/0x4d0 [ 36.314249] rcu_core+0x8c8/0x2860 [ 36.314717] __do_softirq+0x1b7/0x7d4 [ 36.315205] [ 36.315421] Last potentially related work creation: [ 36.316014] kasan_save_stack+0x22/0x50 [ 36.316521] __kasan_record_aux_stack+0x8e/0xa0 [ 36.317100] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.317840] remove_vma+0x139/0x170 [ 36.318300] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.318881] do_vmi_munmap+0x1f1/0x2b0 [ 36.319372] __vm_munmap+0x138/0x3a0 [ 36.319842] __x64_sys_munmap+0x59/0x80 [ 36.320352] do_syscall_64+0x3f/0x90 [ 36.320830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.321487] [ 36.321708] Second to last potentially related work creation: [ 36.322412] kasan_save_stack+0x22/0x50 [ 36.322928] __kasan_record_aux_stack+0x8e/0xa0 [ 36.323512] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.324165] remove_vma+0x139/0x170 [ 36.324621] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.325194] do_vmi_munmap+0x1f1/0x2b0 [ 36.325692] mmap_region+0x1f9/0x2660 [ 36.326180] do_mmap+0x854/0xf00 [ 36.326634] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.327129] ksys_mmap_pgoff+0x7d/0x500 [ 36.327623] do_syscall_64+0x3f/0x90 [ 36.328113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.328764] [ 36.328984] The buggy address belongs to the object at ffff888018cc99f8 [ 36.328984] which belongs to the cache vm_area_struct of size 168 [ 36.330485] The buggy address is located 88 bytes inside of [ 36.330485] freed 168-byte region [ffff888018cc99f8, ffff888018cc9aa0) [ 36.331903] [ 36.332128] The buggy address belongs to the physical page: [ 36.332800] page:000000003db3fa8b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18cc9 [ 36.333912] memcg:ffff888018da8d01 [ 36.334369] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.335022] page_type: 0xffffffff() [ 36.335480] raw: 0100000000000200 ffff8880087a0c80 ffffea00005afe80 dead000000000006 [ 36.336413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018da8d01 [ 36.337335] page dumped because: kasan: bad access detected [ 36.338016] [ 36.338237] Memory state around the buggy address: [ 36.338837] ffff888018cc9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.339712] ffff888018cc9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 36.340583] >ffff888018cc9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.341458] ^ [ 36.342169] ffff888018cc9a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 36.343056] ffff888018cc9b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.343922] ================================================================== [ 36.344917] Disabling lock debugging due to kernel taint [ 38.590087] BUG: Bad rss-counter state mm:00000000e032c844 type:MM_FILEPAGES val:33 [ 38.591052] BUG: Bad rss-counter state mm:00000000e032c844 type:MM_ANONPAGES val:22 [ 39.149664] BUG: Bad rss-counter state mm:00000000f60c189f type:MM_FILEPAGES val:33 [ 39.150915] BUG: Bad rss-counter state mm:00000000f60c189f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57579' (ECDSA) to the list of known hosts. 2023/06/20 11:30:29 fuzzer started 2023/06/20 11:30:30 dialing manager at localhost:36067 2023/06/20 11:30:30 checking machine... 2023/06/20 11:30:30 checking revisions... [ 39.802587] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:30:30 testing simple program... [ 39.850216] cgroup: Unknown subsys name 'net' [ 39.901453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c63d500 RCX=ffff88800c63d500 RDX=0000000080070002 RSI=ffff88800c63d500 RDI=ffff8880087b83c0 RBP=ffff88801c69f438 RSP=ffff88801c69f3a0 R8 =0000000080070001 R9 =0000000000000000 R10=ffffea0000318e00 R11=000000008080005f R12=ffffea0000318e00 R13=ffff88800c63c400 R14=0000000080070001 R15=ffff8880087b83c0 RIP=ffffffff81809672 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 00007f6704684900 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=00007f6704c3b618 CR3=000000000c972000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f3e4219c240 CR3=0000000016f7a000 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=2039323a30333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a30333a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000