syzkaller login: [ 39.444588] BUG: Bad rss-counter state mm:00000000efdc5d0d type:MM_FILEPAGES val:33 [ 39.445771] BUG: Bad rss-counter state mm:00000000efdc5d0d type:MM_ANONPAGES val:22 [ 39.616545] ================================================================== [ 39.617651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.618784] Read of size 8 at addr ffff88800d99c140 by task sshd/224 [ 39.619828] [ 39.620088] CPU: 1 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.621101] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.622258] Call Trace: [ 39.622641] [ 39.623007] dump_stack_lvl+0x91/0xf0 [ 39.623594] print_report+0xcc/0x620 [ 39.624146] ? __virt_addr_valid+0x102/0x340 [ 39.624733] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.625398] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.626049] kasan_report+0xbe/0xf0 [ 39.626564] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.627235] vma_interval_tree_remove+0xc75/0xec0 [ 39.627873] vma_prepare+0xc54/0x11a0 [ 39.628381] __split_vma+0x5af/0x950 [ 39.628877] ? __pfx___split_vma+0x10/0x10 [ 39.629439] ? find_held_lock+0x2c/0x110 [ 39.629995] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.630595] ? lock_is_held_type+0x9f/0x120 [ 39.631199] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.631844] ? mtree_range_walk+0x632/0x900 [ 39.632432] ? mas_walk+0x5c7/0x7c0 [ 39.632935] do_vmi_munmap+0x1f1/0x2b0 [ 39.633468] mmap_region+0x1f9/0x2660 [ 39.633985] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.634550] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.635339] ? __pfx_lock_acquire+0x10/0x10 [ 39.635929] ? __pfx_mmap_region+0x10/0x10 [ 39.636517] ? security_mmap_addr+0x7d/0xa0 [ 39.637101] ? get_unmapped_area+0x1f5/0x3f0 [ 39.637712] do_mmap+0x854/0xf00 [ 39.638192] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.638732] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.639360] ksys_mmap_pgoff+0x3af/0x500 [ 39.639915] do_syscall_64+0x3f/0x90 [ 39.640441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.641148] RIP: 0033:0x7f66e9d9ed82 [ 39.641653] 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 [ 39.643991] RSP: 002b:00007ffce1d656a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.644989] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66e9d9ed82 [ 39.645920] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66e91d8000 [ 39.646857] RBP: 00007f66e91d8000 R08: 0000000000000009 R09: 0000000000001000 [ 39.647786] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624ced10d90 [ 39.648729] R13: 00007ffce1d656c0 R14: 00007ffce1d656f0 R15: 00007ffce1d65a50 [ 39.649675] [ 39.650000] [ 39.650236] Allocated by task 217: [ 39.650696] kasan_save_stack+0x22/0x50 [ 39.651244] kasan_set_track+0x25/0x30 [ 39.651784] __kasan_slab_alloc+0x59/0x70 [ 39.652359] kmem_cache_alloc+0x16b/0x370 [ 39.652930] vm_area_dup+0x20/0x160 [ 39.653432] __split_vma+0x170/0x950 [ 39.653935] split_vma+0xc6/0x110 [ 39.654428] mprotect_fixup+0x8d2/0xb30 [ 39.654994] do_mprotect_pkey+0x87e/0xd40 [ 39.655568] __x64_sys_mprotect+0x78/0xc0 [ 39.656145] do_syscall_64+0x3f/0x90 [ 39.656661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.657364] [ 39.657600] Freed by task 217: [ 39.658032] kasan_save_stack+0x22/0x50 [ 39.658594] kasan_set_track+0x25/0x30 [ 39.659145] kasan_save_free_info+0x2b/0x50 [ 39.659738] __kasan_slab_free+0x10a/0x190 [ 39.660327] kmem_cache_free+0x10d/0x4d0 [ 39.660881] rcu_core+0x8c8/0x2860 [ 39.661372] __do_softirq+0x1b7/0x7d4 [ 39.661896] [ 39.662131] Last potentially related work creation: [ 39.662772] kasan_save_stack+0x22/0x50 [ 39.663339] __kasan_record_aux_stack+0x8e/0xa0 [ 39.663976] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.664685] remove_vma+0x139/0x170 [ 39.665180] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.665791] do_vmi_munmap+0x1f1/0x2b0 [ 39.666333] __vm_munmap+0x138/0x3a0 [ 39.666836] __x64_sys_munmap+0x59/0x80 [ 39.667383] do_syscall_64+0x3f/0x90 [ 39.667905] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.668618] [ 39.668855] The buggy address belongs to the object at ffff88800d99c0e8 [ 39.668855] which belongs to the cache vm_area_struct of size 168 [ 39.670470] The buggy address is located 88 bytes inside of [ 39.670470] freed 168-byte region [ffff88800d99c0e8, ffff88800d99c190) [ 39.672025] [ 39.672261] The buggy address belongs to the physical page: [ 39.672986] page:00000000603e7af8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd99c [ 39.674177] memcg:ffff88800da32e01 [ 39.674649] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.675419] page_type: 0xffffffff() [ 39.675906] raw: 0100000000000200 ffff88800879fc80 ffffea0000679ec0 dead000000000007 [ 39.676916] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da32e01 [ 39.677915] page dumped because: kasan: bad access detected [ 39.678636] [ 39.678889] Memory state around the buggy address: [ 39.679532] ffff88800d99c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.680477] ffff88800d99c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 39.681426] >ffff88800d99c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.682375] ^ [ 39.683074] ffff88800d99c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.684011] ffff88800d99c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.684949] ================================================================== [ 39.686350] Disabling lock debugging due to kernel taint [ 41.856567] BUG: Bad rss-counter state mm:000000008cfc1d64 type:MM_FILEPAGES val:33 [ 41.857776] BUG: Bad rss-counter state mm:000000008cfc1d64 type:MM_ANONPAGES val:22 [ 42.444138] BUG: Bad rss-counter state mm:00000000fd97a2ee type:MM_FILEPAGES val:33 [ 42.445131] BUG: Bad rss-counter state mm:00000000fd97a2ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21517' (ECDSA) to the list of known hosts. 2023/06/20 01:07:53 fuzzer started 2023/06/20 01:07:53 dialing manager at localhost:44161 2023/06/20 01:07:54 checking machine... 2023/06/20 01:07:54 checking revisions... [ 43.127380] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:07:54 testing simple program... [ 43.176054] cgroup: Unknown subsys name 'net' [ 43.215924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:07:52 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864b1901 RDX=ffffffff85407e20 RSI=0000000000000000 RDI=ffff88806ce09a98 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff864b19c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800ce03410 RIP=ffffffff81130340 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=00007ffdc2c33c88 CR3=0000000005482000 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=00007fcb1c739510000055a6e7a5e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff849f3df4 RBX=00000000a6a6432e RCX=1ffffffff093e7be RDX=ffff888015828000 RSI=0000000000000000 RDI=0000000000000000 RBP=00000000db448769 RSP=ffff88800eec7658 R8 =0000000000000006 R9 =0000000039057a11 R10=0000000000000004 R11=0000000000000000 R12=dffffc0000000000 R13=ffffffff849f2c00 R14=0000000000000004 R15=ffff888015683ba0 RIP=ffffffff8219de8c RFL=00000217 [----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 00007f2fe14ff700 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=00007efcdb3a10b0 CR3=0000000019dac000 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=2033353a37303a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37303a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000