syzkaller login: [ 31.631258] BUG: Bad rss-counter state mm:00000000d0c508a4 type:MM_FILEPAGES val:33 [ 31.632560] BUG: Bad rss-counter state mm:00000000d0c508a4 type:MM_ANONPAGES val:22 [ 31.782066] ================================================================== [ 31.782917] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.783833] Read of size 8 at addr ffff88800f19f058 by task sshd/220 [ 31.784587] [ 31.784795] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.785814] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.786759] Call Trace: [ 31.787091] [ 31.787388] dump_stack_lvl+0x91/0xf0 [ 31.787852] print_report+0xcc/0x620 [ 31.788331] ? __virt_addr_valid+0x102/0x340 [ 31.788858] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789454] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790067] kasan_report+0xbe/0xf0 [ 31.790518] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.791140] vma_interval_tree_remove+0xc75/0xec0 [ 31.791718] vma_prepare+0xc54/0x11a0 [ 31.792185] __split_vma+0x5af/0x950 [ 31.792632] ? __pfx___split_vma+0x10/0x10 [ 31.793150] ? find_held_lock+0x2c/0x110 [ 31.793643] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.794214] ? lock_is_held_type+0x9f/0x120 [ 31.794737] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.795367] ? mtree_range_walk+0x632/0x900 [ 31.795910] ? mas_walk+0x5c7/0x7c0 [ 31.796388] do_vmi_munmap+0x1f1/0x2b0 [ 31.796870] mmap_region+0x1f9/0x2660 [ 31.797359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.797879] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.798602] ? __pfx_lock_acquire+0x10/0x10 [ 31.799160] ? __pfx_mmap_region+0x10/0x10 [ 31.799685] ? security_mmap_addr+0x7d/0xa0 [ 31.800228] ? get_unmapped_area+0x1f5/0x3f0 [ 31.800776] do_mmap+0x854/0xf00 [ 31.801230] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.801715] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.802295] ksys_mmap_pgoff+0x3af/0x500 [ 31.802789] do_syscall_64+0x3f/0x90 [ 31.803293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803926] RIP: 0033:0x7f7cc6654d82 [ 31.804392] 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 [ 31.806536] RSP: 002b:00007ffff6ee8cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807460] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7cc6654d82 [ 31.808321] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7cc5a8e000 [ 31.809168] RBP: 00007f7cc5a8e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.810039] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569b4dd9f70 [ 31.810876] R13: 00007ffff6ee8cf0 R14: 00007ffff6ee8d20 R15: 00007ffff6ee9080 [ 31.811751] [ 31.812055] [ 31.812265] Allocated by task 213: [ 31.812684] kasan_save_stack+0x22/0x50 [ 31.813200] kasan_set_track+0x25/0x30 [ 31.813695] __kasan_slab_alloc+0x59/0x70 [ 31.814248] kmem_cache_alloc+0x16b/0x370 [ 31.814765] vm_area_dup+0x20/0x160 [ 31.815236] __split_vma+0x170/0x950 [ 31.815696] split_vma+0xc6/0x110 [ 31.816151] mprotect_fixup+0x8d2/0xb30 [ 31.816645] do_mprotect_pkey+0x87e/0xd40 [ 31.817181] __x64_sys_mprotect+0x78/0xc0 [ 31.817704] do_syscall_64+0x3f/0x90 [ 31.818217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818854] [ 31.819099] Freed by task 213: [ 31.819488] kasan_save_stack+0x22/0x50 [ 31.820010] kasan_set_track+0x25/0x30 [ 31.820501] kasan_save_free_info+0x2b/0x50 [ 31.821032] __kasan_slab_free+0x10a/0x190 [ 31.821551] kmem_cache_free+0x10d/0x4d0 [ 31.822092] rcu_core+0x8c8/0x2860 [ 31.822536] __do_softirq+0x1b7/0x7d4 [ 31.823022] [ 31.823246] Last potentially related work creation: [ 31.823827] kasan_save_stack+0x22/0x50 [ 31.824352] __kasan_record_aux_stack+0x8e/0xa0 [ 31.824914] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.825555] remove_vma+0x139/0x170 [ 31.826026] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.826582] do_vmi_munmap+0x1f1/0x2b0 [ 31.827092] __vm_munmap+0x138/0x3a0 [ 31.827558] __x64_sys_munmap+0x59/0x80 [ 31.828064] do_syscall_64+0x3f/0x90 [ 31.828535] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.829185] [ 31.829404] The buggy address belongs to the object at ffff88800f19f000 [ 31.829404] which belongs to the cache vm_area_struct of size 168 [ 31.830902] The buggy address is located 88 bytes inside of [ 31.830902] freed 168-byte region [ffff88800f19f000, ffff88800f19f0a8) [ 31.832331] [ 31.832543] The buggy address belongs to the physical page: [ 31.833214] page:00000000675baff6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf19f [ 31.834301] memcg:ffff88800c775701 [ 31.834728] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.835396] page_type: 0xffffffff() [ 31.835849] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.836778] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c775701 [ 31.837670] page dumped because: kasan: bad access detected [ 31.838368] [ 31.838580] Memory state around the buggy address: [ 31.839183] ffff88800f19ef00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.840047] ffff88800f19ef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.840894] >ffff88800f19f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.841752] ^ [ 31.842491] ffff88800f19f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.843358] ffff88800f19f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.844206] ================================================================== [ 31.845186] Disabling lock debugging due to kernel taint [ 34.106618] BUG: Bad rss-counter state mm:0000000007f517e3 type:MM_FILEPAGES val:33 [ 34.107849] BUG: Bad rss-counter state mm:0000000007f517e3 type:MM_ANONPAGES val:22 [ 34.490216] BUG: Bad rss-counter state mm:000000005ef74062 type:MM_FILEPAGES val:33 [ 34.491216] BUG: Bad rss-counter state mm:000000005ef74062 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39505' (ECDSA) to the list of known hosts. 2023/06/20 06:33:51 fuzzer started 2023/06/20 06:33:51 dialing manager at localhost:44161 2023/06/20 06:33:51 checking machine... 2023/06/20 06:33:51 checking revisions... [ 35.218507] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:33:51 testing simple program... [ 35.275207] cgroup: Unknown subsys name 'net' [ 35.323077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:33:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fa9d65453b0 CR3=000000001828e000 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=2030353a33333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1003357d86 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016fb51c0 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff11003357d86 RSP=ffff888019abec20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff888019abf278 RIP=ffffffff812d8660 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 00007f4541ddb900 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=00007f4541dba020 CR3=0000000016612000 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=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