syzkaller login: [ 30.509395] BUG: Bad rss-counter state mm:00000000a756d691 type:MM_FILEPAGES val:33 [ 30.510591] BUG: Bad rss-counter state mm:00000000a756d691 type:MM_ANONPAGES val:22 [ 30.553435] ================================================================== [ 30.554379] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.555476] Read of size 8 at addr ffff88800b9604e0 by task sshd/221 [ 30.556255] [ 30.556478] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.557352] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.558367] Call Trace: [ 30.558701] [ 30.558987] dump_stack_lvl+0x91/0xf0 [ 30.559496] print_report+0xcc/0x620 [ 30.559983] ? __virt_addr_valid+0x102/0x340 [ 30.560541] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.561784] kasan_report+0xbe/0xf0 [ 30.562268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.562897] vma_interval_tree_remove+0xc75/0xec0 [ 30.563497] vma_prepare+0xc54/0x11a0 [ 30.563981] __split_vma+0x5af/0x950 [ 30.564461] ? __pfx___split_vma+0x10/0x10 [ 30.564998] ? find_held_lock+0x2c/0x110 [ 30.565534] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.566129] ? lock_is_held_type+0x9f/0x120 [ 30.566672] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.567277] ? mtree_range_walk+0x632/0x900 [ 30.567833] ? mas_walk+0x5c7/0x7c0 [ 30.568317] do_vmi_munmap+0x1f1/0x2b0 [ 30.568812] mmap_region+0x1f9/0x2660 [ 30.569299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.569828] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.570551] ? __pfx_lock_acquire+0x10/0x10 [ 30.571099] ? __pfx_mmap_region+0x10/0x10 [ 30.571633] ? security_mmap_addr+0x7d/0xa0 [ 30.572186] ? get_unmapped_area+0x1f5/0x3f0 [ 30.572749] do_mmap+0x854/0xf00 [ 30.573184] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.573716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.574305] ksys_mmap_pgoff+0x3af/0x500 [ 30.574816] do_syscall_64+0x3f/0x90 [ 30.575412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.576041] RIP: 0033:0x7fbb88c71d82 [ 30.576491] 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 [ 30.578587] RSP: 002b:00007ffd02648128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.579475] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbb88c71d82 [ 30.580313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbb880ab000 [ 30.581144] RBP: 00007fbb880ab000 R08: 0000000000000009 R09: 0000000000001000 [ 30.581984] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620f19f5ec0 [ 30.582824] R13: 00007ffd02648140 R14: 00007ffd02648170 R15: 00007ffd026484d0 [ 30.583664] [ 30.583952] [ 30.584166] Allocated by task 214: [ 30.584588] kasan_save_stack+0x22/0x50 [ 30.585090] kasan_set_track+0x25/0x30 [ 30.585577] __kasan_slab_alloc+0x59/0x70 [ 30.586111] kmem_cache_alloc+0x16b/0x370 [ 30.586619] vm_area_dup+0x20/0x160 [ 30.587071] __split_vma+0x170/0x950 [ 30.587527] split_vma+0xc6/0x110 [ 30.587962] mprotect_fixup+0x8d2/0xb30 [ 30.588458] do_mprotect_pkey+0x87e/0xd40 [ 30.588974] __x64_sys_mprotect+0x78/0xc0 [ 30.589487] do_syscall_64+0x3f/0x90 [ 30.589962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.590590] [ 30.590804] Freed by task 214: [ 30.591192] kasan_save_stack+0x22/0x50 [ 30.591691] kasan_set_track+0x25/0x30 [ 30.592180] kasan_save_free_info+0x2b/0x50 [ 30.592706] __kasan_slab_free+0x10a/0x190 [ 30.593232] kmem_cache_free+0x10d/0x4d0 [ 30.593750] rcu_core+0x8c8/0x2860 [ 30.594188] __do_softirq+0x1b7/0x7d4 [ 30.594660] [ 30.594874] Last potentially related work creation: [ 30.595456] kasan_save_stack+0x22/0x50 [ 30.595957] __kasan_record_aux_stack+0x8e/0xa0 [ 30.596528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.597159] remove_vma+0x139/0x170 [ 30.597606] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.598160] do_vmi_munmap+0x1f1/0x2b0 [ 30.598644] __vm_munmap+0x138/0x3a0 [ 30.599108] __x64_sys_munmap+0x59/0x80 [ 30.599602] do_syscall_64+0x3f/0x90 [ 30.600073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.600709] [ 30.600923] Second to last potentially related work creation: [ 30.601593] kasan_save_stack+0x22/0x50 [ 30.602099] __kasan_record_aux_stack+0x8e/0xa0 [ 30.602668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.603303] remove_vma+0x139/0x170 [ 30.603750] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.604302] do_vmi_munmap+0x1f1/0x2b0 [ 30.604782] mmap_region+0x1f9/0x2660 [ 30.605252] do_mmap+0x854/0xf00 [ 30.605678] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.606184] ksys_mmap_pgoff+0x7d/0x500 [ 30.606670] do_syscall_64+0x3f/0x90 [ 30.607141] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.607779] [ 30.607994] The buggy address belongs to the object at ffff88800b960488 [ 30.607994] which belongs to the cache vm_area_struct of size 168 [ 30.609442] The buggy address is located 88 bytes inside of [ 30.609442] freed 168-byte region [ffff88800b960488, ffff88800b960530) [ 30.610838] [ 30.611056] The buggy address belongs to the physical page: [ 30.611725] page:00000000912a18c1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb960 [ 30.612796] memcg:ffff88800d8ebe01 [ 30.613225] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.613867] page_type: 0xffffffff() [ 30.614317] raw: 0100000000000200 ffff8880087a0c80 ffffea00003faf00 dead000000000008 [ 30.615228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8ebe01 [ 30.616129] page dumped because: kasan: bad access detected [ 30.616773] [ 30.616983] Memory state around the buggy address: [ 30.617548] ffff88800b960380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.618403] ffff88800b960400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.619241] >ffff88800b960480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.620063] ^ [ 30.620799] ffff88800b960500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 30.621629] ffff88800b960580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.622470] ================================================================== [ 30.623634] Disabling lock debugging due to kernel taint [ 33.436444] BUG: Bad rss-counter state mm:0000000064e97e02 type:MM_FILEPAGES val:33 [ 33.437445] BUG: Bad rss-counter state mm:0000000064e97e02 type:MM_ANONPAGES val:22 [ 33.962366] BUG: Bad rss-counter state mm:000000007db1cf09 type:MM_FILEPAGES val:33 [ 33.963559] BUG: Bad rss-counter state mm:000000007db1cf09 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30209' (ECDSA) to the list of known hosts. 2023/06/20 21:32:29 fuzzer started 2023/06/20 21:32:29 dialing manager at localhost:36067 2023/06/20 21:32:29 checking machine... 2023/06/20 21:32:29 checking revisions... [ 34.655288] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:32:29 testing simple program... [ 34.711660] cgroup: Unknown subsys name 'net' [ 34.755103] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:32:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fffd1a242d8 CR3=0000000005482000 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=00007f4a99f975100000559dc5ce7790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff8880163802b0 RCX=ffffffff81f18cf7 RDX=ffff888016b51b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880163802e8 RSP=ffff888016d47ca8 R8 =0000000000000001 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000001 R14=0000000000000001 R15=ffff8880163802b0 RIP=ffffffff814c02c5 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 00007f4e38a57900 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=00007f4e3900f0b0 CR3=000000001ca58000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000