syzkaller login: [ 31.293557] BUG: Bad rss-counter state mm:00000000bb5d57ae type:MM_FILEPAGES val:33 [ 31.294348] BUG: Bad rss-counter state mm:00000000bb5d57ae type:MM_ANONPAGES val:22 [ 31.412771] ================================================================== [ 31.413311] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.413858] Read of size 8 at addr ffff88800d582228 by task sshd/220 [ 31.414299] [ 31.414429] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.414928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.415501] Call Trace: [ 31.415688] [ 31.415858] dump_stack_lvl+0x91/0xf0 [ 31.416148] print_report+0xcc/0x620 [ 31.416430] ? __virt_addr_valid+0x102/0x340 [ 31.416759] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417117] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.417479] kasan_report+0xbe/0xf0 [ 31.417755] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418191] vma_interval_tree_remove+0xc75/0xec0 [ 31.418543] vma_prepare+0xc54/0x11a0 [ 31.418825] __split_vma+0x5af/0x950 [ 31.419102] ? __pfx___split_vma+0x10/0x10 [ 31.419408] ? find_held_lock+0x2c/0x110 [ 31.419713] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.420045] ? lock_is_held_type+0x9f/0x120 [ 31.420368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.420733] ? mtree_range_walk+0x632/0x900 [ 31.421059] ? mas_walk+0x5c7/0x7c0 [ 31.421336] do_vmi_munmap+0x1f1/0x2b0 [ 31.421621] mmap_region+0x1f9/0x2660 [ 31.421900] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.422195] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.422617] ? __pfx_lock_acquire+0x10/0x10 [ 31.422932] ? __pfx_mmap_region+0x10/0x10 [ 31.423239] ? security_mmap_addr+0x7d/0xa0 [ 31.423546] ? get_unmapped_area+0x1f5/0x3f0 [ 31.423864] do_mmap+0x854/0xf00 [ 31.424117] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.424398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.424737] ksys_mmap_pgoff+0x3af/0x500 [ 31.425031] do_syscall_64+0x3f/0x90 [ 31.425300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.425667] RIP: 0033:0x7ffa4bdf8d82 [ 31.425937] 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 [ 31.427195] RSP: 002b:00007ffe9b102908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.427713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffa4bdf8d82 [ 31.428205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffa4b232000 [ 31.428702] RBP: 00007ffa4b232000 R08: 0000000000000009 R09: 0000000000001000 [ 31.429189] R10: 0000000000000812 R11: 0000000000000206 R12: 000055695d46ef60 [ 31.429691] R13: 00007ffe9b102920 R14: 00007ffe9b102950 R15: 00007ffe9b102cb0 [ 31.430188] [ 31.430353] [ 31.430474] Allocated by task 212: [ 31.430720] kasan_save_stack+0x22/0x50 [ 31.431013] kasan_set_track+0x25/0x30 [ 31.431295] __kasan_slab_alloc+0x59/0x70 [ 31.431596] kmem_cache_alloc+0x16b/0x370 [ 31.431898] vm_area_dup+0x20/0x160 [ 31.432157] __split_vma+0x170/0x950 [ 31.432422] split_vma+0xc6/0x110 [ 31.432683] mprotect_fixup+0x8d2/0xb30 [ 31.432977] do_mprotect_pkey+0x87e/0xd40 [ 31.433272] __x64_sys_mprotect+0x78/0xc0 [ 31.433569] do_syscall_64+0x3f/0x90 [ 31.433830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434188] [ 31.434304] Freed by task 13: [ 31.434518] kasan_save_stack+0x22/0x50 [ 31.434804] kasan_set_track+0x25/0x30 [ 31.435072] kasan_save_free_info+0x2b/0x50 [ 31.435363] __kasan_slab_free+0x10a/0x190 [ 31.435654] kmem_cache_free+0x10d/0x4d0 [ 31.435935] rcu_core+0x8c8/0x2860 [ 31.436181] __do_softirq+0x1b7/0x7d4 [ 31.436440] [ 31.436560] Last potentially related work creation: [ 31.436896] kasan_save_stack+0x22/0x50 [ 31.437174] __kasan_record_aux_stack+0x8e/0xa0 [ 31.437489] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.437844] remove_vma+0x139/0x170 [ 31.438090] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.438395] do_vmi_munmap+0x1f1/0x2b0 [ 31.438664] __vm_munmap+0x138/0x3a0 [ 31.438922] __x64_sys_munmap+0x59/0x80 [ 31.439193] do_syscall_64+0x3f/0x90 [ 31.439452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439803] [ 31.439923] Second to last potentially related work creation: [ 31.440302] kasan_save_stack+0x22/0x50 [ 31.440579] __kasan_record_aux_stack+0x8e/0xa0 [ 31.440905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.441262] remove_vma+0x139/0x170 [ 31.441512] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.441820] do_vmi_munmap+0x1f1/0x2b0 [ 31.442088] mmap_region+0x1f9/0x2660 [ 31.442349] do_mmap+0x854/0xf00 [ 31.442592] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.442863] ksys_mmap_pgoff+0x3af/0x500 [ 31.443147] do_syscall_64+0x3f/0x90 [ 31.443417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.443794] [ 31.443917] The buggy address belongs to the object at ffff88800d5821d0 [ 31.443917] which belongs to the cache vm_area_struct of size 168 [ 31.444781] The buggy address is located 88 bytes inside of [ 31.444781] freed 168-byte region [ffff88800d5821d0, ffff88800d582278) [ 31.445598] [ 31.445726] The buggy address belongs to the physical page: [ 31.446128] page:000000006ca9cfde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd582 [ 31.446764] memcg:ffff88800d4b5701 [ 31.447015] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.447427] page_type: 0xffffffff() [ 31.447688] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.448240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4b5701 [ 31.448785] page dumped because: kasan: bad access detected [ 31.449179] [ 31.449303] Memory state around the buggy address: [ 31.449642] ffff88800d582100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.450148] ffff88800d582180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.450648] >ffff88800d582200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.451143] ^ [ 31.451463] ffff88800d582280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.451971] ffff88800d582300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.452475] ================================================================== [ 31.453070] Disabling lock debugging due to kernel taint [ 32.624534] BUG: Bad rss-counter state mm:0000000038b713b4 type:MM_FILEPAGES val:33 [ 32.625315] BUG: Bad rss-counter state mm:0000000038b713b4 type:MM_ANONPAGES val:22 [ 33.041006] BUG: Bad rss-counter state mm:0000000077fd9e2e type:MM_FILEPAGES val:33 [ 33.042200] BUG: Bad rss-counter state mm:0000000077fd9e2e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38936' (ECDSA) to the list of known hosts. 2023/06/19 18:30:08 fuzzer started 2023/06/19 18:30:08 dialing manager at localhost:44161 2023/06/19 18:30:08 checking machine... 2023/06/19 18:30:08 checking revisions... [ 33.779953] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:30:08 testing simple program... [ 33.827858] cgroup: Unknown subsys name 'net' [ 33.873355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:05 Registers: info registers vcpu 0 RAX=ffffffff84506c7f RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880145bff01 RSI=ffff8880145bff38 RDI=ffff8880145bff38 RBP=ffff8880145bf2e8 RSP=ffff8880145bf220 R8 =ffffffff863b233c R9 =ffff8880145bf2d0 R10=0000000000038001 R11=000000000008aa92 R12=ffff8880145bf2f0 R13=ffff8880145bf2d8 R14=ffff8880145bff40 R15=ffff8880145bf290 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007f394337c900 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=00007f3943933618 CR3=000000000e1b4000 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=ffff888008c58400 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=00007f3126100048 CR3=000000000dc9a000 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=bf3c4d3da5e4a6b4ff4a61123fc22b68 XMM02=000000000011f288eff9b2d0a8fce9cb XMM03=000000000011f3582c67c8bc2e329bc3 XMM04=cef2c30201dabbee00000000000ae988 XMM05=19e9129bd510f2350000000000134a58 XMM06=16b308fe5b46df0700000000001338a0 XMM07=e042d86d42eb936e00000000001234f0 XMM08=46ac5325acbdf480000000000011f358 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000