syzkaller login: [ 30.708887] BUG: Bad rss-counter state mm:000000006cfad1a6 type:MM_FILEPAGES val:33 [ 30.710095] BUG: Bad rss-counter state mm:000000006cfad1a6 type:MM_ANONPAGES val:22 [ 30.745826] ================================================================== [ 30.746875] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.747850] Read of size 8 at addr ffff88800e9483f8 by task sshd/220 [ 30.748705] [ 30.748916] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.749720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.750642] Call Trace: [ 30.750948] [ 30.751221] dump_stack_lvl+0x91/0xf0 [ 30.751685] print_report+0xcc/0x620 [ 30.752149] ? __virt_addr_valid+0x102/0x340 [ 30.752669] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753251] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.753842] kasan_report+0xbe/0xf0 [ 30.754321] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.754974] vma_interval_tree_remove+0xc75/0xec0 [ 30.755587] vma_prepare+0xc54/0x11a0 [ 30.756062] __split_vma+0x5af/0x950 [ 30.756530] ? __pfx___split_vma+0x10/0x10 [ 30.757046] ? find_held_lock+0x2c/0x110 [ 30.757564] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.758135] ? lock_is_held_type+0x9f/0x120 [ 30.758700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.759312] ? mtree_range_walk+0x632/0x900 [ 30.759862] ? mas_walk+0x5c7/0x7c0 [ 30.760333] do_vmi_munmap+0x1f1/0x2b0 [ 30.760819] mmap_region+0x1f9/0x2660 [ 30.761301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.761820] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.762539] ? __pfx_lock_acquire+0x10/0x10 [ 30.763071] ? __pfx_mmap_region+0x10/0x10 [ 30.763605] ? security_mmap_addr+0x7d/0xa0 [ 30.764128] ? get_unmapped_area+0x1f5/0x3f0 [ 30.764672] do_mmap+0x854/0xf00 [ 30.765107] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.765602] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.766164] ksys_mmap_pgoff+0x3af/0x500 [ 30.766671] do_syscall_64+0x3f/0x90 [ 30.767147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.767793] RIP: 0033:0x7f1b23e4ad82 [ 30.768237] 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 [ 30.770393] RSP: 002b:00007fff24be1688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.771303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b23e4ad82 [ 30.772154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b23284000 [ 30.773005] RBP: 00007f1b23284000 R08: 0000000000000009 R09: 0000000000001000 [ 30.773850] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b0ecceec0 [ 30.774709] R13: 00007fff24be16a0 R14: 00007fff24be16d0 R15: 00007fff24be1a30 [ 30.775561] [ 30.775843] [ 30.776055] Allocated by task 213: [ 30.776520] kasan_save_stack+0x22/0x50 [ 30.777128] kasan_set_track+0x25/0x30 [ 30.777722] __kasan_slab_alloc+0x59/0x70 [ 30.778389] kmem_cache_alloc+0x16b/0x370 [ 30.779029] vm_area_dup+0x20/0x160 [ 30.779578] __split_vma+0x170/0x950 [ 30.780137] split_vma+0xc6/0x110 [ 30.780665] mprotect_fixup+0x8d2/0xb30 [ 30.781306] do_mprotect_pkey+0x87e/0xd40 [ 30.781931] __x64_sys_mprotect+0x78/0xc0 [ 30.782567] do_syscall_64+0x3f/0x90 [ 30.783145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.783932] [ 30.784195] Freed by task 19: [ 30.784669] kasan_save_stack+0x22/0x50 [ 30.785274] kasan_set_track+0x25/0x30 [ 30.785877] kasan_save_free_info+0x2b/0x50 [ 30.786543] __kasan_slab_free+0x10a/0x190 [ 30.787185] kmem_cache_free+0x10d/0x4d0 [ 30.787813] rcu_core+0x8c8/0x2860 [ 30.788356] __do_softirq+0x1b7/0x7d4 [ 30.788923] [ 30.789191] Last potentially related work creation: [ 30.789924] kasan_save_stack+0x22/0x50 [ 30.790542] __kasan_record_aux_stack+0x8e/0xa0 [ 30.791241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792019] remove_vma+0x139/0x170 [ 30.792569] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793249] do_vmi_munmap+0x1f1/0x2b0 [ 30.793838] __vm_munmap+0x138/0x3a0 [ 30.794421] __x64_sys_munmap+0x59/0x80 [ 30.795032] do_syscall_64+0x3f/0x90 [ 30.795607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796382] [ 30.796627] The buggy address belongs to the object at ffff88800e9483a0 [ 30.796627] which belongs to the cache vm_area_struct of size 168 [ 30.798447] The buggy address is located 88 bytes inside of [ 30.798447] freed 168-byte region [ffff88800e9483a0, ffff88800e948448) [ 30.800177] [ 30.800431] The buggy address belongs to the physical page: [ 30.801233] page:00000000dcbd32b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe948 [ 30.802509] memcg:ffff8880095c9e01 [ 30.802942] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.803622] page_type: 0xffffffff() [ 30.804084] raw: 0100000000000200 ffff8880087a0c80 ffffea0000251c00 dead000000000006 [ 30.805027] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095c9e01 [ 30.805980] page dumped because: kasan: bad access detected [ 30.806689] [ 30.806912] Memory state around the buggy address: [ 30.807522] ffff88800e948280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.808395] ffff88800e948300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.809280] >ffff88800e948380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.810170] ^ [ 30.811042] ffff88800e948400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.811929] ffff88800e948480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.812781] ================================================================== [ 30.813885] Disabling lock debugging due to kernel taint [ 32.721846] BUG: Bad rss-counter state mm:00000000551e3178 type:MM_FILEPAGES val:33 [ 32.723377] BUG: Bad rss-counter state mm:00000000551e3178 type:MM_ANONPAGES val:22 [ 33.228132] BUG: Bad rss-counter state mm:00000000d2d070b5 type:MM_FILEPAGES val:33 [ 33.229114] BUG: Bad rss-counter state mm:00000000d2d070b5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16796' (ECDSA) to the list of known hosts. 2023/06/21 07:48:17 fuzzer started 2023/06/21 07:48:17 dialing manager at localhost:36067 2023/06/21 07:48:17 checking machine... 2023/06/21 07:48:17 checking revisions... [ 33.940528] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:48:17 testing simple program... [ 33.988770] cgroup: Unknown subsys name 'net' [ 34.041184] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:17 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b54e7 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff8880101051b0 RIP=ffffffff814c0400 RFL=00000246 [---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 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=00007fdb6022a940 CR3=000000000f1f6000 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=a223f536dcb40688d4493259b0b2dc57 XMM02=000000000011dac0eff9b2d0a8fce9cb XMM03=000000000011db902c67c8bc2e329bc3 XMM04=f00f5a146362c37f00000000000ae988 XMM05=6c49369a8b2627f70000000000132e30 XMM06=4fda316b135da52b0000000000131ed0 XMM07=e042d86d42eb936e0000000000122478 XMM08=9264e240b0666b6c000000000011db90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffffffff8118ddc3 RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff88800ea19b40 R15=ffff88801645a000 RIP=ffffffff813ad47e RFL=00000286 [--S--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 00007fe310c7c900 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=00007ffe47fce000 CR3=000000000e850000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000