syzkaller login: [ 30.667934] BUG: Bad rss-counter state mm:000000009ef8e2ae type:MM_FILEPAGES val:33 [ 30.669180] BUG: Bad rss-counter state mm:000000009ef8e2ae type:MM_ANONPAGES val:22 [ 30.718091] ================================================================== [ 30.719060] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.720045] Read of size 8 at addr ffff88801a188310 by task sshd/221 [ 30.720890] [ 30.721120] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.722033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.723075] Call Trace: [ 30.723418] [ 30.723717] dump_stack_lvl+0x91/0xf0 [ 30.724261] print_report+0xcc/0x620 [ 30.724778] ? __virt_addr_valid+0x102/0x340 [ 30.725364] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726013] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.726682] kasan_report+0xbe/0xf0 [ 30.727194] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.727851] vma_interval_tree_remove+0xc75/0xec0 [ 30.728539] vma_prepare+0xc54/0x11a0 [ 30.729066] __split_vma+0x5af/0x950 [ 30.729586] ? __pfx___split_vma+0x10/0x10 [ 30.730177] ? find_held_lock+0x2c/0x110 [ 30.730747] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.731370] ? lock_is_held_type+0x9f/0x120 [ 30.731968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.732745] ? mtree_range_walk+0x632/0x900 [ 30.733355] ? mas_walk+0x5c7/0x7c0 [ 30.733878] do_vmi_munmap+0x1f1/0x2b0 [ 30.734441] mmap_region+0x1f9/0x2660 [ 30.734978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.735541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.736360] ? __pfx_lock_acquire+0x10/0x10 [ 30.736940] ? __pfx_mmap_region+0x10/0x10 [ 30.737524] ? security_mmap_addr+0x7d/0xa0 [ 30.738105] ? get_unmapped_area+0x1f5/0x3f0 [ 30.738725] do_mmap+0x854/0xf00 [ 30.739207] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.739744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.740388] ksys_mmap_pgoff+0x3af/0x500 [ 30.740946] do_syscall_64+0x3f/0x90 [ 30.741472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.742197] RIP: 0033:0x7f09cc972d82 [ 30.742697] 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 [ 30.745079] RSP: 002b:00007ffc0fa38a18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.746079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09cc972d82 [ 30.747021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09cbdac000 [ 30.747949] RBP: 00007f09cbdac000 R08: 0000000000000009 R09: 0000000000001000 [ 30.748916] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1d6564d90 [ 30.749849] R13: 00007ffc0fa38a30 R14: 00007ffc0fa38a60 R15: 00007ffc0fa38dc0 [ 30.750806] [ 30.751127] [ 30.751364] Allocated by task 214: [ 30.751833] kasan_save_stack+0x22/0x50 [ 30.752406] kasan_set_track+0x25/0x30 [ 30.752948] __kasan_slab_alloc+0x59/0x70 [ 30.753520] kmem_cache_alloc+0x16b/0x370 [ 30.754087] vm_area_dup+0x20/0x160 [ 30.754596] __split_vma+0x170/0x950 [ 30.755109] split_vma+0xc6/0x110 [ 30.755591] mprotect_fixup+0x8d2/0xb30 [ 30.756145] do_mprotect_pkey+0x87e/0xd40 [ 30.756749] __x64_sys_mprotect+0x78/0xc0 [ 30.757317] do_syscall_64+0x3f/0x90 [ 30.757840] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.758560] [ 30.758799] Freed by task 214: [ 30.759229] kasan_save_stack+0x22/0x50 [ 30.759782] kasan_set_track+0x25/0x30 [ 30.760358] kasan_save_free_info+0x2b/0x50 [ 30.760949] __kasan_slab_free+0x10a/0x190 [ 30.761539] kmem_cache_free+0x10d/0x4d0 [ 30.762096] rcu_core+0x8c8/0x2860 [ 30.762601] __do_softirq+0x1b7/0x7d4 [ 30.763128] [ 30.763364] Last potentially related work creation: [ 30.764005] kasan_save_stack+0x22/0x50 [ 30.764590] __kasan_record_aux_stack+0x8e/0xa0 [ 30.765217] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765927] remove_vma+0x139/0x170 [ 30.766436] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.767048] do_vmi_munmap+0x1f1/0x2b0 [ 30.767584] __vm_munmap+0x138/0x3a0 [ 30.768101] __x64_sys_munmap+0x59/0x80 [ 30.768675] do_syscall_64+0x3f/0x90 [ 30.769197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769903] [ 30.770143] The buggy address belongs to the object at ffff88801a1882b8 [ 30.770143] which belongs to the cache vm_area_struct of size 168 [ 30.771773] The buggy address is located 88 bytes inside of [ 30.771773] freed 168-byte region [ffff88801a1882b8, ffff88801a188360) [ 30.773336] [ 30.773571] The buggy address belongs to the physical page: [ 30.774317] page:00000000e7da9407 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a188 [ 30.775527] memcg:ffff88801a3f8f01 [ 30.775992] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.776744] page_type: 0xffffffff() [ 30.777242] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.778266] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3f8f01 [ 30.779259] page dumped because: kasan: bad access detected [ 30.779985] [ 30.780241] Memory state around the buggy address: [ 30.780881] ffff88801a188200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.781834] ffff88801a188280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.782787] >ffff88801a188300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.783725] ^ [ 30.784279] ffff88801a188380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.785220] ffff88801a188400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.786162] ================================================================== [ 30.787446] Disabling lock debugging due to kernel taint [ 33.115460] BUG: Bad rss-counter state mm:000000008328607c type:MM_FILEPAGES val:33 [ 33.116157] BUG: Bad rss-counter state mm:000000008328607c type:MM_ANONPAGES val:22 [ 33.557043] BUG: Bad rss-counter state mm:000000007f4fbaf4 type:MM_FILEPAGES val:33 [ 33.558679] BUG: Bad rss-counter state mm:000000007f4fbaf4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40930' (ECDSA) to the list of known hosts. 2023/06/20 18:38:24 fuzzer started 2023/06/20 18:38:24 dialing manager at localhost:36067 2023/06/20 18:38:24 checking machine... 2023/06/20 18:38:24 checking revisions... [ 34.291085] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:38:25 testing simple program... [ 34.342547] cgroup: Unknown subsys name 'net' [ 34.381731] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:24 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff88801a05d5b4 RBP=ffff88801a05d1c0 RSP=ffff888019e77518 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f3df6d54fef R13=0000000000000000 R14=ffff88801a05d1c0 R15=0000000000000000 RIP=ffffffff8135bd96 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 00007f3df5f11700 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=00007ffc626b0cb8 CR3=000000001a0f4000 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=2034323a38333a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a38333a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffed100d9e1364 RCX=0000000000000000 RDX=0000000000000001 RSI=0000000000000040 RDI=ffff88806cf09bb0 RBP=ffffffff8186b835 RSP=ffff88806cf09b20 R8 =0000000000000280 R9 =0000000000000000 R10=ffffed1001b1a800 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880087b8780 R14=ffffffff8186b835 R15=ffff88800e9ba780 RIP=ffffffff813ad6d2 RFL=00000282 [--S----] 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 00007fc1992cc900 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=00007fc199883618 CR3=000000000cc4e000 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=563412feff00545000000000000080fe 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