syzkaller login: [ 59.439163] BUG: Bad rss-counter state mm:000000003aece77a type:MM_FILEPAGES val:33 [ 59.440187] BUG: Bad rss-counter state mm:000000003aece77a type:MM_ANONPAGES val:22 [ 59.607328] ================================================================== [ 59.608268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.609220] Read of size 8 at addr ffff88801818f3f8 by task sshd/220 [ 59.610086] [ 59.610308] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.611350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.612352] Call Trace: [ 59.612677] [ 59.612966] dump_stack_lvl+0x91/0xf0 [ 59.613463] print_report+0xcc/0x620 [ 59.613957] ? __virt_addr_valid+0x102/0x340 [ 59.614506] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.615154] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.615782] kasan_report+0xbe/0xf0 [ 59.616257] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.616887] vma_interval_tree_remove+0xc75/0xec0 [ 59.617487] vma_prepare+0xc54/0x11a0 [ 59.617972] __split_vma+0x5af/0x950 [ 59.618456] ? __pfx___split_vma+0x10/0x10 [ 59.618997] ? find_held_lock+0x2c/0x110 [ 59.619517] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.620087] ? lock_is_held_type+0x9f/0x120 [ 59.620632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.621231] ? mtree_range_walk+0x632/0x900 [ 59.621787] ? mas_walk+0x5c7/0x7c0 [ 59.622263] do_vmi_munmap+0x1f1/0x2b0 [ 59.622761] mmap_region+0x1f9/0x2660 [ 59.623249] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.623764] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.624477] ? __pfx_lock_acquire+0x10/0x10 [ 59.625011] ? __pfx_mmap_region+0x10/0x10 [ 59.625540] ? security_mmap_addr+0x7d/0xa0 [ 59.626069] ? get_unmapped_area+0x1f5/0x3f0 [ 59.626634] do_mmap+0x854/0xf00 [ 59.627090] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.627583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.628155] ksys_mmap_pgoff+0x3af/0x500 [ 59.628658] do_syscall_64+0x3f/0x90 [ 59.629139] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.629784] RIP: 0033:0x7f82627f0d82 [ 59.630239] 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 [ 59.632349] RSP: 002b:00007ffdfebe8c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.633249] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f82627f0d82 [ 59.634090] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8261c2a000 [ 59.634932] RBP: 00007f8261c2a000 R08: 0000000000000009 R09: 0000000000001000 [ 59.635778] R10: 0000000000000812 R11: 0000000000000206 R12: 000055738428aec0 [ 59.636618] R13: 00007ffdfebe8c60 R14: 00007ffdfebe8c90 R15: 00007ffdfebe8ff0 [ 59.637465] [ 59.637753] [ 59.637966] Allocated by task 213: [ 59.638394] kasan_save_stack+0x22/0x50 [ 59.638922] kasan_set_track+0x25/0x30 [ 59.639410] __kasan_slab_alloc+0x59/0x70 [ 59.639933] kmem_cache_alloc+0x16b/0x370 [ 59.640452] vm_area_dup+0x20/0x160 [ 59.640915] __split_vma+0x170/0x950 [ 59.641387] split_vma+0xc6/0x110 [ 59.641827] mprotect_fixup+0x8d2/0xb30 [ 59.642326] do_mprotect_pkey+0x87e/0xd40 [ 59.642848] __x64_sys_mprotect+0x78/0xc0 [ 59.643371] do_syscall_64+0x3f/0x90 [ 59.643845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.644483] [ 59.644702] Freed by task 213: [ 59.645098] kasan_save_stack+0x22/0x50 [ 59.645604] kasan_set_track+0x25/0x30 [ 59.646091] kasan_save_free_info+0x2b/0x50 [ 59.646620] __kasan_slab_free+0x10a/0x190 [ 59.647160] kmem_cache_free+0x10d/0x4d0 [ 59.647668] rcu_core+0x8c8/0x2860 [ 59.648121] __do_softirq+0x1b7/0x7d4 [ 59.648593] [ 59.648810] Last potentially related work creation: [ 59.649394] kasan_save_stack+0x22/0x50 [ 59.649896] __kasan_record_aux_stack+0x8e/0xa0 [ 59.650466] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.651118] remove_vma+0x139/0x170 [ 59.651568] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.652121] do_vmi_munmap+0x1f1/0x2b0 [ 59.652602] __vm_munmap+0x138/0x3a0 [ 59.653068] __x64_sys_munmap+0x59/0x80 [ 59.653577] do_syscall_64+0x3f/0x90 [ 59.654048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.654687] [ 59.654908] The buggy address belongs to the object at ffff88801818f3a0 [ 59.654908] which belongs to the cache vm_area_struct of size 168 [ 59.656367] The buggy address is located 88 bytes inside of [ 59.656367] freed 168-byte region [ffff88801818f3a0, ffff88801818f448) [ 59.657755] [ 59.657972] The buggy address belongs to the physical page: [ 59.658629] page:0000000008a2793f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1818f [ 59.659735] memcg:ffff88801451e801 [ 59.660161] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.660820] page_type: 0xffffffff() [ 59.661267] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 59.662189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801451e801 [ 59.663121] page dumped because: kasan: bad access detected [ 59.663787] [ 59.664002] Memory state around the buggy address: [ 59.664600] ffff88801818f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 59.665466] ffff88801818f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 59.666326] >ffff88801818f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 59.667178] ^ [ 59.668025] ffff88801818f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 59.668892] ffff88801818f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.669740] ================================================================== [ 59.670846] Disabling lock debugging due to kernel taint [ 61.619595] BUG: Bad rss-counter state mm:000000008aa0ac77 type:MM_FILEPAGES val:33 [ 61.620630] BUG: Bad rss-counter state mm:000000008aa0ac77 type:MM_ANONPAGES val:22 [ 62.108664] BUG: Bad rss-counter state mm:00000000a1126be0 type:MM_FILEPAGES val:33 [ 62.109669] BUG: Bad rss-counter state mm:00000000a1126be0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7075' (ECDSA) to the list of known hosts. 2023/06/20 06:50:01 fuzzer started 2023/06/20 06:50:01 dialing manager at localhost:44161 2023/06/20 06:50:01 checking machine... 2023/06/20 06:50:01 checking revisions... [ 62.829866] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:50:02 testing simple program... [ 62.875890] cgroup: Unknown subsys name 'net' [ 62.913054] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:49:32 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=00007f3111b9f000 CR3=000000000c8f4000 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=2031303a30353a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a30353a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81ef1437 RDX=000000000000ef14 RSI=000000000000ef14 RDI=ffffffff86523810 RBP=ffff88800cfcf930 RSP=ffff88800cfcf868 R8 =0000000000000000 R9 =ffff88800cfcf918 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800cfcf938 R13=ffff88800cfcf920 R14=ffff88800cfcf919 R15=ffff88800cfcf8d8 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fb5f198d900 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=00007ffe55e6a000 CR3=000000001cd3c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000