syzkaller login: [ 30.452706] BUG: Bad rss-counter state mm:000000003cfea7c3 type:MM_FILEPAGES val:33 [ 30.453953] BUG: Bad rss-counter state mm:000000003cfea7c3 type:MM_ANONPAGES val:22 [ 30.496469] ================================================================== [ 30.497785] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.499012] Read of size 8 at addr ffff88800d701228 by task sshd/220 [ 30.500021] [ 30.500307] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.501465] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.502742] Call Trace: [ 30.503167] [ 30.503526] dump_stack_lvl+0x91/0xf0 [ 30.504178] print_report+0xcc/0x620 [ 30.504792] ? __virt_addr_valid+0x102/0x340 [ 30.505511] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.506322] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.507129] kasan_report+0xbe/0xf0 [ 30.507759] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.508559] vma_interval_tree_remove+0xc75/0xec0 [ 30.509378] vma_prepare+0xc54/0x11a0 [ 30.509997] __split_vma+0x5af/0x950 [ 30.510602] ? __pfx___split_vma+0x10/0x10 [ 30.511290] ? find_held_lock+0x2c/0x110 [ 30.511955] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.512690] ? lock_is_held_type+0x9f/0x120 [ 30.513412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.514193] ? mtree_range_walk+0x632/0x900 [ 30.514902] ? mas_walk+0x5c7/0x7c0 [ 30.515519] do_vmi_munmap+0x1f1/0x2b0 [ 30.516167] mmap_region+0x1f9/0x2660 [ 30.516796] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.517467] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.518415] ? __pfx_lock_acquire+0x10/0x10 [ 30.519107] ? __pfx_mmap_region+0x10/0x10 [ 30.519786] ? security_mmap_addr+0x7d/0xa0 [ 30.520477] ? get_unmapped_area+0x1f5/0x3f0 [ 30.521207] do_mmap+0x854/0xf00 [ 30.521661] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.522168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.522905] ksys_mmap_pgoff+0x3af/0x500 [ 30.523416] do_syscall_64+0x3f/0x90 [ 30.523900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.524553] RIP: 0033:0x7fb19f252d82 [ 30.525014] 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 [ 30.527157] RSP: 002b:00007ffeadedc558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.528063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb19f252d82 [ 30.528921] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb19e68c000 [ 30.529783] RBP: 00007fb19e68c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.530661] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564df865aec0 [ 30.531559] R13: 00007ffeadedc570 R14: 00007ffeadedc5a0 R15: 00007ffeadedc900 [ 30.532464] [ 30.532773] [ 30.533002] Allocated by task 213: [ 30.533486] kasan_save_stack+0x22/0x50 [ 30.534023] kasan_set_track+0x25/0x30 [ 30.534554] __kasan_slab_alloc+0x59/0x70 [ 30.535107] kmem_cache_alloc+0x16b/0x370 [ 30.535651] vm_area_dup+0x20/0x160 [ 30.536129] __split_vma+0x170/0x950 [ 30.536625] split_vma+0xc6/0x110 [ 30.537098] mprotect_fixup+0x8d2/0xb30 [ 30.537633] do_mprotect_pkey+0x87e/0xd40 [ 30.538188] __x64_sys_mprotect+0x78/0xc0 [ 30.538728] do_syscall_64+0x3f/0x90 [ 30.539240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.539926] [ 30.540162] Freed by task 213: [ 30.540572] kasan_save_stack+0x22/0x50 [ 30.541121] kasan_set_track+0x25/0x30 [ 30.541648] kasan_save_free_info+0x2b/0x50 [ 30.542212] __kasan_slab_free+0x10a/0x190 [ 30.542771] kmem_cache_free+0x10d/0x4d0 [ 30.543315] rcu_core+0x8c8/0x2860 [ 30.543782] __do_softirq+0x1b7/0x7d4 [ 30.544288] [ 30.544521] Last potentially related work creation: [ 30.545151] kasan_save_stack+0x22/0x50 [ 30.545684] __kasan_record_aux_stack+0x8e/0xa0 [ 30.546299] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.546959] remove_vma+0x139/0x170 [ 30.547440] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.548042] do_vmi_munmap+0x1f1/0x2b0 [ 30.548561] __vm_munmap+0x138/0x3a0 [ 30.549057] __x64_sys_munmap+0x59/0x80 [ 30.549608] do_syscall_64+0x3f/0x90 [ 30.550116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.550791] [ 30.551021] Second to last potentially related work creation: [ 30.551754] kasan_save_stack+0x22/0x50 [ 30.552287] __kasan_record_aux_stack+0x8e/0xa0 [ 30.552895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.553589] remove_vma+0x139/0x170 [ 30.554070] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.554670] do_vmi_munmap+0x1f1/0x2b0 [ 30.555197] __vm_munmap+0x138/0x3a0 [ 30.555700] __x64_sys_munmap+0x59/0x80 [ 30.556218] do_syscall_64+0x3f/0x90 [ 30.556718] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.557420] [ 30.557644] The buggy address belongs to the object at ffff88800d7011d0 [ 30.557644] which belongs to the cache vm_area_struct of size 168 [ 30.559193] The buggy address is located 88 bytes inside of [ 30.559193] freed 168-byte region [ffff88800d7011d0, ffff88800d701278) [ 30.560700] [ 30.560925] The buggy address belongs to the physical page: [ 30.561644] page:000000006c1dd01e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd701 [ 30.562767] memcg:ffff88800ca77d01 [ 30.563222] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.563960] page_type: 0xffffffff() [ 30.564436] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 30.565415] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca77d01 [ 30.566379] page dumped because: kasan: bad access detected [ 30.567072] [ 30.567301] Memory state around the buggy address: [ 30.567911] ffff88800d701100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.568818] ffff88800d701180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.569744] >ffff88800d701200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.570645] ^ [ 30.571235] ffff88800d701280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.572152] ffff88800d701300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.573074] ================================================================== [ 30.574285] Disabling lock debugging due to kernel taint [ 32.500439] BUG: Bad rss-counter state mm:0000000010242553 type:MM_FILEPAGES val:33 [ 32.501636] BUG: Bad rss-counter state mm:0000000010242553 type:MM_ANONPAGES val:22 [ 32.996057] BUG: Bad rss-counter state mm:000000007339a8c2 type:MM_FILEPAGES val:33 [ 32.997689] BUG: Bad rss-counter state mm:000000007339a8c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28312' (ECDSA) to the list of known hosts. 2023/06/20 19:39:50 fuzzer started 2023/06/20 19:39:50 dialing manager at localhost:36067 2023/06/20 19:39:50 checking machine... 2023/06/20 19:39:50 checking revisions... [ 33.737283] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:39:51 testing simple program... [ 33.786818] cgroup: Unknown subsys name 'net' [ 33.830295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:39:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888008d9f978 RSI=ffffffff81809add RDI=ffff888008d9f978 RBP=ffff888008d9fa10 RSP=ffff888008d9f960 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000020db7 R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff888008d9f978 RIP=ffffffff811305e8 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 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=00007f18b1dcb3c0 CR3=000000000f64a000 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=e68b302dec9ea89f8a495011093572ff XMM02=000000000011a038eff9b2d0a8fce9cb XMM03=000000000011a1082c67c8bc2e329bc3 XMM04=afa91353a002ed4500000000000ae988 XMM05=2b00a38f2527f44600000000001334e0 XMM06=19e9129bd510f2350000000000132340 XMM07=fb795ef6d65770560000000000121498 XMM08=2c67c8bc2e329bc3000000000011a0a8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110037f6cf7 RBX=ffff88801bfb6788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801bfb67b8 RBP=ffff88801bc41508 RSP=ffff88806cf09de8 R8 =0000000000000001 R9 =ffffed100d9e13b1 R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801bc41678 R14=ffffffff813782f8 R15=ffff88801bc41678 RIP=ffffffff818464ec RFL=00000046 [---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 00007f36a4f2b900 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=00007f36a54e2618 CR3=0000000018c84000 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=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