syzkaller login: [ 31.550251] BUG: Bad rss-counter state mm:00000000ef8711e3 type:MM_FILEPAGES val:33 [ 31.551530] BUG: Bad rss-counter state mm:00000000ef8711e3 type:MM_ANONPAGES val:22 [ 31.586308] ================================================================== [ 31.587243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.588257] Read of size 8 at addr ffff88800d86ced8 by task sshd/221 [ 31.589018] [ 31.589240] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.590129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.591109] Call Trace: [ 31.591428] [ 31.591714] dump_stack_lvl+0x91/0xf0 [ 31.592217] print_report+0xcc/0x620 [ 31.592699] ? __virt_addr_valid+0x102/0x340 [ 31.593256] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.593880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.594511] kasan_report+0xbe/0xf0 [ 31.594990] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.595615] vma_interval_tree_remove+0xc75/0xec0 [ 31.596210] vma_prepare+0xc54/0x11a0 [ 31.596704] __split_vma+0x5af/0x950 [ 31.597192] ? __pfx___split_vma+0x10/0x10 [ 31.597737] ? find_held_lock+0x2c/0x110 [ 31.598284] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.598871] ? lock_is_held_type+0x9f/0x120 [ 31.599429] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.600056] ? mtree_range_walk+0x632/0x900 [ 31.600627] ? mas_walk+0x5c7/0x7c0 [ 31.601122] do_vmi_munmap+0x1f1/0x2b0 [ 31.601630] mmap_region+0x1f9/0x2660 [ 31.602135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.602661] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.603396] ? __pfx_lock_acquire+0x10/0x10 [ 31.603948] ? __pfx_mmap_region+0x10/0x10 [ 31.604501] ? security_mmap_addr+0x7d/0xa0 [ 31.605048] ? get_unmapped_area+0x1f5/0x3f0 [ 31.605613] do_mmap+0x854/0xf00 [ 31.606085] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.606590] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.607171] ksys_mmap_pgoff+0x3af/0x500 [ 31.607691] do_syscall_64+0x3f/0x90 [ 31.608186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.608855] RIP: 0033:0x7f61ff4f8d82 [ 31.609323] 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 [ 31.611533] RSP: 002b:00007ffcd8e1f2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.612473] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f61ff4f8d82 [ 31.613352] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f61fe932000 [ 31.614235] RBP: 00007f61fe932000 R08: 0000000000000009 R09: 0000000000001000 [ 31.615110] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557680308980 [ 31.615989] R13: 00007ffcd8e1f2d0 R14: 00007ffcd8e1f300 R15: 00007ffcd8e1f660 [ 31.616884] [ 31.617187] [ 31.617408] Allocated by task 214: [ 31.617849] kasan_save_stack+0x22/0x50 [ 31.618396] kasan_set_track+0x25/0x30 [ 31.618906] __kasan_slab_alloc+0x59/0x70 [ 31.619447] kmem_cache_alloc+0x16b/0x370 [ 31.619982] vm_area_dup+0x20/0x160 [ 31.620453] __split_vma+0x170/0x950 [ 31.620941] split_vma+0xc6/0x110 [ 31.621396] mprotect_fixup+0x8d2/0xb30 [ 31.621912] do_mprotect_pkey+0x87e/0xd40 [ 31.622460] __x64_sys_mprotect+0x78/0xc0 [ 31.623005] do_syscall_64+0x3f/0x90 [ 31.623494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.624163] [ 31.624385] Freed by task 214: [ 31.624785] kasan_save_stack+0x22/0x50 [ 31.625306] kasan_set_track+0x25/0x30 [ 31.625818] kasan_save_free_info+0x2b/0x50 [ 31.626387] __kasan_slab_free+0x10a/0x190 [ 31.626935] kmem_cache_free+0x10d/0x4d0 [ 31.627459] rcu_core+0x8c8/0x2860 [ 31.627916] __do_softirq+0x1b7/0x7d4 [ 31.628412] [ 31.628633] Last potentially related work creation: [ 31.629236] kasan_save_stack+0x22/0x50 [ 31.629757] __kasan_record_aux_stack+0x8e/0xa0 [ 31.630359] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.631022] remove_vma+0x139/0x170 [ 31.631487] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.632060] do_vmi_munmap+0x1f1/0x2b0 [ 31.632559] __vm_munmap+0x138/0x3a0 [ 31.633044] __x64_sys_munmap+0x59/0x80 [ 31.633556] do_syscall_64+0x3f/0x90 [ 31.634069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.634733] [ 31.634954] The buggy address belongs to the object at ffff88800d86ce80 [ 31.634954] which belongs to the cache vm_area_struct of size 168 [ 31.636477] The buggy address is located 88 bytes inside of [ 31.636477] freed 168-byte region [ffff88800d86ce80, ffff88800d86cf28) [ 31.637950] [ 31.638181] The buggy address belongs to the physical page: [ 31.638858] page:00000000e238ec5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd86c [ 31.639984] memcg:ffff88800e0f2e01 [ 31.640427] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.641098] page_type: 0xffffffff() [ 31.641560] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.642534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0f2e01 [ 31.643480] page dumped because: kasan: bad access detected [ 31.644168] [ 31.644389] Memory state around the buggy address: [ 31.644990] ffff88800d86cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.645890] ffff88800d86ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.646780] >ffff88800d86ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.647663] ^ [ 31.648418] ffff88800d86cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.649308] ffff88800d86cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.650205] ================================================================== [ 31.651285] Disabling lock debugging due to kernel taint [ 34.018261] BUG: Bad rss-counter state mm:00000000397ed42e type:MM_FILEPAGES val:33 [ 34.019256] BUG: Bad rss-counter state mm:00000000397ed42e type:MM_ANONPAGES val:22 [ 34.478376] BUG: Bad rss-counter state mm:00000000d7378d55 type:MM_FILEPAGES val:33 [ 34.479889] BUG: Bad rss-counter state mm:00000000d7378d55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34402' (ECDSA) to the list of known hosts. 2023/06/20 18:40:33 fuzzer started 2023/06/20 18:40:33 dialing manager at localhost:36067 2023/06/20 18:40:33 checking machine... 2023/06/20 18:40:33 checking revisions... [ 35.177563] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:40:33 testing simple program... [ 35.231032] cgroup: Unknown subsys name 'net' [ 35.276292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:40:33 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=ffff88800f3a0000 RCX=0000000000000000 RDX=ffffc90000660000 RSI=ffffffff83018b3f RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806ce09eb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806ce09ff8 R12=0000000000000000 R13=ffff88800f3a1428 R14=ffff88800f3a1040 R15=000000000000000a RIP=ffffffff83018b6c 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 00007f26380dd8c0 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=00007fffe596f358 CR3=000000000c6a0000 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=25252525252525252525252525252525 XMM01=0000ff0000ff0000ff0000ff0000ff00 XMM02=0000ff0000000000ff0000000000ff00 XMM03=00302e79726f74616c756765723a6d72 XMM04=2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f2f XMM05=00000000000000000000000000000000 XMM06=00005629b4a0cd900000000700000009 XMM07=00000000000000000000000000000000 XMM08=3a56000a73253a51000a73253a47000a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138eb5 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800c7af9b0 RSP=ffff88800c7af8e8 R8 =ffffffff86138eb4 R9 =ffff88800c7af998 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800c7af9b8 R13=ffff88800c7af9a0 R14=ffff88800c7af999 R15=ffff88800c7af958 RIP=ffffffff81130ab5 RFL=00000297 [--S-APC] 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 00007f0ef990c900 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=00007ffeb5842000 CR3=00000000190fa000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000