syzkaller login: [ 32.637965] BUG: Bad rss-counter state mm:00000000f45b1833 type:MM_FILEPAGES val:33 [ 32.639212] BUG: Bad rss-counter state mm:00000000f45b1833 type:MM_ANONPAGES val:22 [ 32.674018] ================================================================== [ 32.674967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.675965] Read of size 8 at addr ffff888016b6c880 by task sshd/219 [ 32.676801] [ 32.677026] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.677928] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.678950] Call Trace: [ 32.679279] [ 32.679573] dump_stack_lvl+0x91/0xf0 [ 32.680089] print_report+0xcc/0x620 [ 32.680608] ? __virt_addr_valid+0x102/0x340 [ 32.681201] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.681847] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.682502] kasan_report+0xbe/0xf0 [ 32.683007] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.683654] vma_interval_tree_remove+0xc75/0xec0 [ 32.684277] vma_prepare+0xc54/0x11a0 [ 32.684795] __split_vma+0x5af/0x950 [ 32.685428] ? __pfx___split_vma+0x10/0x10 [ 32.685980] ? find_held_lock+0x2c/0x110 [ 32.686520] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.687104] ? lock_is_held_type+0x9f/0x120 [ 32.687689] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.688315] ? mtree_range_walk+0x632/0x900 [ 32.688905] ? mas_walk+0x5c7/0x7c0 [ 32.689398] do_vmi_munmap+0x1f1/0x2b0 [ 32.689915] mmap_region+0x1f9/0x2660 [ 32.690431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.690972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.691735] ? __pfx_lock_acquire+0x10/0x10 [ 32.692300] ? __pfx_mmap_region+0x10/0x10 [ 32.692866] ? security_mmap_addr+0x7d/0xa0 [ 32.693425] ? get_unmapped_area+0x1f5/0x3f0 [ 32.694007] do_mmap+0x854/0xf00 [ 32.694468] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.694978] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.695575] ksys_mmap_pgoff+0x3af/0x500 [ 32.696107] do_syscall_64+0x3f/0x90 [ 32.696622] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.697300] RIP: 0033:0x7feca4f75d82 [ 32.697788] 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 [ 32.700078] RSP: 002b:00007ffe298e9138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.701047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feca4f75d82 [ 32.701940] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feca43af000 [ 32.702837] RBP: 00007feca43af000 R08: 0000000000000009 R09: 0000000000001000 [ 32.703723] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612e80e8f70 [ 32.704619] R13: 00007ffe298e9150 R14: 00007ffe298e9180 R15: 00007ffe298e94e0 [ 32.705530] [ 32.705839] [ 32.706062] Allocated by task 212: [ 32.706510] kasan_save_stack+0x22/0x50 [ 32.707035] kasan_set_track+0x25/0x30 [ 32.707551] __kasan_slab_alloc+0x59/0x70 [ 32.708100] kmem_cache_alloc+0x16b/0x370 [ 32.708660] vm_area_dup+0x20/0x160 [ 32.709143] __split_vma+0x170/0x950 [ 32.709634] split_vma+0xc6/0x110 [ 32.710090] mprotect_fixup+0x8d2/0xb30 [ 32.710612] do_mprotect_pkey+0x87e/0xd40 [ 32.711162] __x64_sys_mprotect+0x78/0xc0 [ 32.711708] do_syscall_64+0x3f/0x90 [ 32.712198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.712885] [ 32.713107] Freed by task 212: [ 32.713519] kasan_save_stack+0x22/0x50 [ 32.714052] kasan_set_track+0x25/0x30 [ 32.714582] kasan_save_free_info+0x2b/0x50 [ 32.715142] __kasan_slab_free+0x10a/0x190 [ 32.715704] kmem_cache_free+0x10d/0x4d0 [ 32.716239] rcu_core+0x8c8/0x2860 [ 32.716744] __do_softirq+0x1b7/0x7d4 [ 32.717226] [ 32.717440] Last potentially related work creation: [ 32.718023] kasan_save_stack+0x22/0x50 [ 32.718525] __kasan_record_aux_stack+0x8e/0xa0 [ 32.719113] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.719748] remove_vma+0x139/0x170 [ 32.720198] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.720764] do_vmi_munmap+0x1f1/0x2b0 [ 32.721252] __vm_munmap+0x138/0x3a0 [ 32.721723] __x64_sys_munmap+0x59/0x80 [ 32.722226] do_syscall_64+0x3f/0x90 [ 32.722700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.723343] [ 32.723559] The buggy address belongs to the object at ffff888016b6c828 [ 32.723559] which belongs to the cache vm_area_struct of size 168 [ 32.725047] The buggy address is located 88 bytes inside of [ 32.725047] freed 168-byte region [ffff888016b6c828, ffff888016b6c8d0) [ 32.726502] [ 32.726726] The buggy address belongs to the physical page: [ 32.727419] page:000000005f6d2ef7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b6c [ 32.728568] memcg:ffff88801b972e01 [ 32.729038] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.729719] page_type: 0xffffffff() [ 32.730182] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.731130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b972e01 [ 32.732070] page dumped because: kasan: bad access detected [ 32.732758] [ 32.732977] Memory state around the buggy address: [ 32.733584] ffff888016b6c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 32.734493] ffff888016b6c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.735380] >ffff888016b6c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.736265] ^ [ 32.736700] ffff888016b6c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.737579] ffff888016b6c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 32.738466] ================================================================== [ 32.739477] Disabling lock debugging due to kernel taint [ 34.625476] BUG: Bad rss-counter state mm:000000002547fd07 type:MM_FILEPAGES val:33 [ 34.626542] BUG: Bad rss-counter state mm:000000002547fd07 type:MM_ANONPAGES val:22 [ 34.982235] BUG: Bad rss-counter state mm:00000000c4f14fe8 type:MM_FILEPAGES val:33 [ 34.983116] BUG: Bad rss-counter state mm:00000000c4f14fe8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34602' (ECDSA) to the list of known hosts. 2023/06/19 20:46:08 fuzzer started 2023/06/19 20:46:08 dialing manager at localhost:44161 2023/06/19 20:46:08 checking machine... 2023/06/19 20:46:08 checking revisions... [ 35.528324] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:46:08 testing simple program... [ 35.573664] cgroup: Unknown subsys name 'net' [ 35.627098] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:46:06 Registers: info registers vcpu 0 RAX=ffffffff849f2c00 RBX=00000000151e72f0 RCX=0000000000000000 RDX=0000000000000007 RSI=ffffffff8219e015 RDI=0000000000000002 RBP=ffff888019ea7781 RSP=ffff888019ea7658 R8 =0000000000000006 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=0000000000000002 R13=0000000000000002 R14=dffffc0000000000 R15=ffffffff849f2c94 RIP=ffffffff8219e076 RFL=00000206 [-----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 00007f4e3ccdd700 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=00007f670fd136b0 CR3=000000000e4e2000 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=2037303a36343a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36343a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdfee13ab8 CR3=0000000005482000 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=00007fca187ba510000055a66149d790 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