syzkaller login: [ 40.898523] BUG: Bad rss-counter state mm:00000000c3bc5e8a type:MM_FILEPAGES val:33 [ 40.899940] BUG: Bad rss-counter state mm:00000000c3bc5e8a type:MM_ANONPAGES val:22 [ 41.061931] ================================================================== [ 41.063075] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.064420] Read of size 8 at addr ffff888009462968 by task sshd/220 [ 41.065313] [ 41.065604] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.066613] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.067586] Call Trace: [ 41.067904] [ 41.068192] dump_stack_lvl+0x91/0xf0 [ 41.068686] print_report+0xcc/0x620 [ 41.069169] ? __virt_addr_valid+0x102/0x340 [ 41.069718] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.070336] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.070943] kasan_report+0xbe/0xf0 [ 41.071423] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.072047] vma_interval_tree_remove+0xc75/0xec0 [ 41.072667] vma_prepare+0xc54/0x11a0 [ 41.073145] __split_vma+0x5af/0x950 [ 41.073624] ? __pfx___split_vma+0x10/0x10 [ 41.074160] ? find_held_lock+0x2c/0x110 [ 41.074675] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.075240] ? lock_is_held_type+0x9f/0x120 [ 41.075773] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.076373] ? mtree_range_walk+0x632/0x900 [ 41.076933] ? mas_walk+0x5c7/0x7c0 [ 41.077401] do_vmi_munmap+0x1f1/0x2b0 [ 41.077889] mmap_region+0x1f9/0x2660 [ 41.078364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.078871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.079593] ? __pfx_lock_acquire+0x10/0x10 [ 41.080120] ? __pfx_mmap_region+0x10/0x10 [ 41.080656] ? security_mmap_addr+0x7d/0xa0 [ 41.081178] ? get_unmapped_area+0x1f5/0x3f0 [ 41.081724] do_mmap+0x854/0xf00 [ 41.082158] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.082652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.083212] ksys_mmap_pgoff+0x3af/0x500 [ 41.083712] do_syscall_64+0x3f/0x90 [ 41.084196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.084862] RIP: 0033:0x7f56bb94bd82 [ 41.085314] 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 [ 41.087415] RSP: 002b:00007ffe6bbb3648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.088320] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f56bb94bd82 [ 41.089177] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f56bad85000 [ 41.090017] RBP: 00007f56bad85000 R08: 0000000000000009 R09: 0000000000001000 [ 41.090860] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca0edf7ec0 [ 41.091702] R13: 00007ffe6bbb3660 R14: 00007ffe6bbb3690 R15: 00007ffe6bbb39f0 [ 41.092559] [ 41.092849] [ 41.093062] Allocated by task 213: [ 41.093489] kasan_save_stack+0x22/0x50 [ 41.093996] kasan_set_track+0x25/0x30 [ 41.094492] __kasan_slab_alloc+0x59/0x70 [ 41.095016] kmem_cache_alloc+0x16b/0x370 [ 41.095525] vm_area_dup+0x20/0x160 [ 41.095977] __split_vma+0x170/0x950 [ 41.096466] split_vma+0xc6/0x110 [ 41.096909] mprotect_fixup+0x8d2/0xb30 [ 41.097424] do_mprotect_pkey+0x87e/0xd40 [ 41.097947] __x64_sys_mprotect+0x78/0xc0 [ 41.098470] do_syscall_64+0x3f/0x90 [ 41.098941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.099574] [ 41.099787] Freed by task 19: [ 41.100171] kasan_save_stack+0x22/0x50 [ 41.100679] kasan_set_track+0x25/0x30 [ 41.101169] kasan_save_free_info+0x2b/0x50 [ 41.101699] __kasan_slab_free+0x10a/0x190 [ 41.102225] kmem_cache_free+0x10d/0x4d0 [ 41.102728] rcu_core+0x8c8/0x2860 [ 41.103171] __do_softirq+0x1b7/0x7d4 [ 41.103645] [ 41.103858] Last potentially related work creation: [ 41.104437] kasan_save_stack+0x22/0x50 [ 41.104962] __kasan_record_aux_stack+0x8e/0xa0 [ 41.105530] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.106172] remove_vma+0x139/0x170 [ 41.106629] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.107187] do_vmi_munmap+0x1f1/0x2b0 [ 41.107674] __vm_munmap+0x138/0x3a0 [ 41.108136] __x64_sys_munmap+0x59/0x80 [ 41.108641] do_syscall_64+0x3f/0x90 [ 41.109114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.109750] [ 41.109964] The buggy address belongs to the object at ffff888009462910 [ 41.109964] which belongs to the cache vm_area_struct of size 168 [ 41.111414] The buggy address is located 88 bytes inside of [ 41.111414] freed 168-byte region [ffff888009462910, ffff8880094629b8) [ 41.112819] [ 41.113036] The buggy address belongs to the physical page: [ 41.113694] page:00000000b983a066 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9462 [ 41.114766] memcg:ffff88800ed9f601 [ 41.115191] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.115834] page_type: 0xffffffff() [ 41.116282] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.117202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed9f601 [ 41.118099] page dumped because: kasan: bad access detected [ 41.118752] [ 41.118966] Memory state around the buggy address: [ 41.119541] ffff888009462800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 41.120389] ffff888009462880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 41.121243] >ffff888009462900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.122081] ^ [ 41.122870] ffff888009462980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 41.123720] ffff888009462a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.124575] ================================================================== [ 41.125665] Disabling lock debugging due to kernel taint [ 43.719905] BUG: Bad rss-counter state mm:00000000801a5a1f type:MM_FILEPAGES val:33 [ 43.721511] BUG: Bad rss-counter state mm:00000000801a5a1f type:MM_ANONPAGES val:22 [ 44.079637] BUG: Bad rss-counter state mm:00000000ca840ec8 type:MM_FILEPAGES val:33 [ 44.080423] BUG: Bad rss-counter state mm:00000000ca840ec8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27939' (ECDSA) to the list of known hosts. 2023/06/20 08:29:22 fuzzer started 2023/06/20 08:29:22 dialing manager at localhost:44161 2023/06/20 08:29:22 checking machine... 2023/06/20 08:29:22 checking revisions... [ 44.776975] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:29:22 testing simple program... [ 44.829579] cgroup: Unknown subsys name 'net' [ 44.869994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:29:19 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=00007fea9ee5e618 CR3=000000000f578000 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=2031323a39323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a39323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f65fcf8 RCX=0000000000000000 RDX=ffff888016d81b40 RSI=ffffffff81749803 RDI=0000000000000004 RBP=00000000000001fe RSP=ffff88800f65f908 R8 =0000000000000004 R9 =00000000000001c7 R10=00000000000001fe R11=0000000000000000 R12=00000000000001c6 R13=ffffea0001b798c0 R14=ffff88800f65fd20 R15=00000000000001c7 RIP=ffffffff814c081b 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 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=00007fc85c058328 CR3=000000000e8f2000 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