syzkaller login: [ 38.722489] BUG: Bad rss-counter state mm:00000000482dd130 type:MM_FILEPAGES val:33 [ 38.723425] BUG: Bad rss-counter state mm:00000000482dd130 type:MM_ANONPAGES val:22 [ 38.890610] ================================================================== [ 38.891587] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.892626] Read of size 8 at addr ffff888019e02df0 by task sshd/220 [ 38.893454] [ 38.893754] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895522] Call Trace: [ 38.895837] [ 38.896105] dump_stack_lvl+0x91/0xf0 [ 38.896581] print_report+0xcc/0x620 [ 38.897039] ? __virt_addr_valid+0x102/0x340 [ 38.897564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898145] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898737] kasan_report+0xbe/0xf0 [ 38.899186] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.899772] vma_interval_tree_remove+0xc75/0xec0 [ 38.900368] vma_prepare+0xc54/0x11a0 [ 38.900844] __split_vma+0x5af/0x950 [ 38.901312] ? __pfx___split_vma+0x10/0x10 [ 38.901831] ? find_held_lock+0x2c/0x110 [ 38.902347] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.902922] ? lock_is_held_type+0x9f/0x120 [ 38.903454] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.904060] ? mtree_range_walk+0x632/0x900 [ 38.904640] ? mas_walk+0x5c7/0x7c0 [ 38.905125] do_vmi_munmap+0x1f1/0x2b0 [ 38.905613] mmap_region+0x1f9/0x2660 [ 38.906094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.906616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.907336] ? __pfx_lock_acquire+0x10/0x10 [ 38.907870] ? __pfx_mmap_region+0x10/0x10 [ 38.908400] ? security_mmap_addr+0x7d/0xa0 [ 38.908924] ? get_unmapped_area+0x1f5/0x3f0 [ 38.909477] do_mmap+0x854/0xf00 [ 38.909918] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.910407] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.910978] ksys_mmap_pgoff+0x3af/0x500 [ 38.911479] do_syscall_64+0x3f/0x90 [ 38.911951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.912626] RIP: 0033:0x7f1e866bad82 [ 38.913089] 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 [ 38.915247] RSP: 002b:00007ffe4844eb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.916161] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e866bad82 [ 38.917067] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e85af4000 [ 38.917982] RBP: 00007f1e85af4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.918920] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a668ff8f70 [ 38.919864] R13: 00007ffe4844eb60 R14: 00007ffe4844eb90 R15: 00007ffe4844eef0 [ 38.920819] [ 38.921141] [ 38.921380] Allocated by task 213: [ 38.921868] kasan_save_stack+0x22/0x50 [ 38.922366] kasan_set_track+0x25/0x30 [ 38.922865] __kasan_slab_alloc+0x59/0x70 [ 38.923409] kmem_cache_alloc+0x16b/0x370 [ 38.923956] vm_area_dup+0x20/0x160 [ 38.924453] __split_vma+0x170/0x950 [ 38.924945] split_vma+0xc6/0x110 [ 38.925381] mprotect_fixup+0x8d2/0xb30 [ 38.925930] do_mprotect_pkey+0x87e/0xd40 [ 38.926460] __x64_sys_mprotect+0x78/0xc0 [ 38.926997] do_syscall_64+0x3f/0x90 [ 38.927479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.928139] [ 38.928367] Freed by task 213: [ 38.928760] kasan_save_stack+0x22/0x50 [ 38.929250] kasan_set_track+0x25/0x30 [ 38.929746] kasan_save_free_info+0x2b/0x50 [ 38.930266] __kasan_slab_free+0x10a/0x190 [ 38.930808] kmem_cache_free+0x10d/0x4d0 [ 38.931307] rcu_core+0x8c8/0x2860 [ 38.931747] __do_softirq+0x1b7/0x7d4 [ 38.932237] [ 38.932450] Last potentially related work creation: [ 38.933031] kasan_save_stack+0x22/0x50 [ 38.933533] __kasan_record_aux_stack+0x8e/0xa0 [ 38.934109] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.934749] remove_vma+0x139/0x170 [ 38.935190] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.935738] do_vmi_munmap+0x1f1/0x2b0 [ 38.936224] __vm_munmap+0x138/0x3a0 [ 38.936681] __x64_sys_munmap+0x59/0x80 [ 38.937199] do_syscall_64+0x3f/0x90 [ 38.937694] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938358] [ 38.938584] Second to last potentially related work creation: [ 38.939289] kasan_save_stack+0x22/0x50 [ 38.939820] __kasan_record_aux_stack+0x8e/0xa0 [ 38.940425] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.941088] remove_vma+0x139/0x170 [ 38.941549] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.942143] do_vmi_munmap+0x1f1/0x2b0 [ 38.942647] mmap_region+0x1f9/0x2660 [ 38.943141] do_mmap+0x854/0xf00 [ 38.943571] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.944082] ksys_mmap_pgoff+0x3af/0x500 [ 38.944613] do_syscall_64+0x3f/0x90 [ 38.945119] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.945793] [ 38.946012] The buggy address belongs to the object at ffff888019e02d98 [ 38.946012] which belongs to the cache vm_area_struct of size 168 [ 38.947501] The buggy address is located 88 bytes inside of [ 38.947501] freed 168-byte region [ffff888019e02d98, ffff888019e02e40) [ 38.948943] [ 38.949160] The buggy address belongs to the physical page: [ 38.949838] page:00000000af52f502 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e02 [ 38.950944] memcg:ffff888010356701 [ 38.951374] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.952091] page_type: 0xffffffff() [ 38.952561] raw: 0100000000000200 ffff8880087a0c80 ffffea000051b680 dead000000000003 [ 38.953497] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010356701 [ 38.954451] page dumped because: kasan: bad access detected [ 38.955139] [ 38.955355] Memory state around the buggy address: [ 38.955971] ffff888019e02c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.956893] ffff888019e02d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.957789] >ffff888019e02d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.958675] ^ [ 38.959508] ffff888019e02e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.960415] ffff888019e02e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.961291] ================================================================== [ 38.962362] Disabling lock debugging due to kernel taint [ 41.496652] BUG: Bad rss-counter state mm:0000000088cddd11 type:MM_FILEPAGES val:33 [ 41.497972] BUG: Bad rss-counter state mm:0000000088cddd11 type:MM_ANONPAGES val:22 [ 41.919926] BUG: Bad rss-counter state mm:00000000e3c8709c type:MM_FILEPAGES val:33 [ 41.920794] BUG: Bad rss-counter state mm:00000000e3c8709c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5896' (ECDSA) to the list of known hosts. 2023/06/20 13:43:03 fuzzer started 2023/06/20 13:43:03 dialing manager at localhost:36067 2023/06/20 13:43:03 checking machine... 2023/06/20 13:43:03 checking revisions... [ 42.680282] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:43:03 testing simple program... [ 42.728400] cgroup: Unknown subsys name 'net' [ 42.765031] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:43:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f75776bc6c7 RCX=0000000000000000 RDX=ffff88800d038000 RSI=ffffffff813a0ac4 RDI=00007f75776bc6c7 RBP=ffffffffffffffff RSP=ffff8880103675d8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f75776bc000 R11=00000000000b6a61 R12=ffff888010367710 R13=0000000000000000 R14=ffff88800d038000 R15=0000000000000282 RIP=ffffffff813a0ad2 RFL=00000283 [--S---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 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=00007fae77b995a0 CR3=0000000016a24000 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=7c9dedb52f5099a992439587eb53df3c XMM02=2c67c8bc2e329bc3000000000011c1d8 XMM03=fb795ef6d65770560000000000122400 XMM04=18c2f2f52568ab1500000000000ae988 XMM05=19e9129bd510f23500000000001332d8 XMM06=2dd2f9706f004daf00000000001324b0 XMM07=e042d86d42eb936e0000000000122680 XMM08=22cfea427ae0dfcd000000000011c238 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000246 RBX=00000000000000e5 RCX=ffffffff812e0135 RDX=1ffffffff0adb096 RSI=0000000000000004 RDI=ffff888016f87b38 RBP=0000000000000020 RSP=ffff888016f87bc8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800d08ac40 R13=0000000000000000 R14=ffff88800ed6b508 R15=ffff88800ed6b4c0 RIP=ffffffff81847621 RFL=00000083 [--S---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 00007f3290915900 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=00007ffc1042d000 CR3=000000000f65e000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000