syzkaller login: [ 31.611521] BUG: Bad rss-counter state mm:000000005970a81a type:MM_FILEPAGES val:33 [ 31.613495] BUG: Bad rss-counter state mm:000000005970a81a type:MM_ANONPAGES val:22 [ 31.756910] ================================================================== [ 31.757515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.758124] Read of size 8 at addr ffff888018ca2968 by task sshd/222 [ 31.758618] [ 31.758759] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.759317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.759958] Call Trace: [ 31.760165] [ 31.760351] dump_stack_lvl+0x91/0xf0 [ 31.760672] print_report+0xcc/0x620 [ 31.761091] ? __virt_addr_valid+0x102/0x340 [ 31.761457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.761849] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.762247] kasan_report+0xbe/0xf0 [ 31.762558] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.762955] vma_interval_tree_remove+0xc75/0xec0 [ 31.763355] vma_prepare+0xc54/0x11a0 [ 31.763676] __split_vma+0x5af/0x950 [ 31.763980] ? __pfx___split_vma+0x10/0x10 [ 31.764325] ? find_held_lock+0x2c/0x110 [ 31.764661] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.765023] ? lock_is_held_type+0x9f/0x120 [ 31.765378] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.765773] ? mtree_range_walk+0x632/0x900 [ 31.766140] ? mas_walk+0x5c7/0x7c0 [ 31.766466] do_vmi_munmap+0x1f1/0x2b0 [ 31.766782] mmap_region+0x1f9/0x2660 [ 31.767091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.767449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.767913] ? __pfx_lock_acquire+0x10/0x10 [ 31.768290] ? __pfx_mmap_region+0x10/0x10 [ 31.768634] ? security_mmap_addr+0x7d/0xa0 [ 31.768973] ? get_unmapped_area+0x1f5/0x3f0 [ 31.769369] do_mmap+0x854/0xf00 [ 31.769661] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.769982] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.770346] ksys_mmap_pgoff+0x3af/0x500 [ 31.770670] do_syscall_64+0x3f/0x90 [ 31.770980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.771411] RIP: 0033:0x7fdafd71bd82 [ 31.771707] 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 [ 31.773087] RSP: 002b:00007fffe653ee68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.773716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdafd71bd82 [ 31.774295] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdafcb55000 [ 31.774833] RBP: 00007fdafcb55000 R08: 0000000000000009 R09: 0000000000001000 [ 31.775422] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b7def91ec0 [ 31.775973] R13: 00007fffe653ee80 R14: 00007fffe653eeb0 R15: 00007fffe653f210 [ 31.776528] [ 31.776717] [ 31.776856] Allocated by task 213: [ 31.777132] kasan_save_stack+0x22/0x50 [ 31.777469] kasan_set_track+0x25/0x30 [ 31.777790] __kasan_slab_alloc+0x59/0x70 [ 31.778132] kmem_cache_alloc+0x16b/0x370 [ 31.778469] vm_area_dup+0x20/0x160 [ 31.778765] __split_vma+0x170/0x950 [ 31.779065] split_vma+0xc6/0x110 [ 31.779357] mprotect_fixup+0x8d2/0xb30 [ 31.779705] do_mprotect_pkey+0x87e/0xd40 [ 31.780045] __x64_sys_mprotect+0x78/0xc0 [ 31.780385] do_syscall_64+0x3f/0x90 [ 31.780693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.781107] [ 31.781246] Freed by task 213: [ 31.781509] kasan_save_stack+0x22/0x50 [ 31.781837] kasan_set_track+0x25/0x30 [ 31.782161] kasan_save_free_info+0x2b/0x50 [ 31.782507] __kasan_slab_free+0x10a/0x190 [ 31.782853] kmem_cache_free+0x10d/0x4d0 [ 31.783181] rcu_core+0x8c8/0x2860 [ 31.783488] __do_softirq+0x1b7/0x7d4 [ 31.783800] [ 31.783940] Last potentially related work creation: [ 31.784324] kasan_save_stack+0x22/0x50 [ 31.784649] __kasan_record_aux_stack+0x8e/0xa0 [ 31.785020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.785449] remove_vma+0x139/0x170 [ 31.785743] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.786106] do_vmi_munmap+0x1f1/0x2b0 [ 31.786421] __vm_munmap+0x138/0x3a0 [ 31.786724] __x64_sys_munmap+0x59/0x80 [ 31.787043] do_syscall_64+0x3f/0x90 [ 31.787354] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787791] [ 31.787932] The buggy address belongs to the object at ffff888018ca2910 [ 31.787932] which belongs to the cache vm_area_struct of size 168 [ 31.788909] The buggy address is located 88 bytes inside of [ 31.788909] freed 168-byte region [ffff888018ca2910, ffff888018ca29b8) [ 31.789840] [ 31.789984] The buggy address belongs to the physical page: [ 31.790412] page:000000008c81ce52 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ca2 [ 31.791125] memcg:ffff888019cb7101 [ 31.791415] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.791836] page_type: 0xffffffff() [ 31.792131] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.792725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cb7101 [ 31.793315] page dumped because: kasan: bad access detected [ 31.793755] [ 31.793898] Memory state around the buggy address: [ 31.794276] ffff888018ca2800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.794827] ffff888018ca2880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.795398] >ffff888018ca2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.795950] ^ [ 31.796457] ffff888018ca2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.797015] ffff888018ca2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.797582] ================================================================== [ 31.798223] Disabling lock debugging due to kernel taint [ 33.714651] BUG: Bad rss-counter state mm:00000000b26ab163 type:MM_FILEPAGES val:33 [ 33.715212] BUG: Bad rss-counter state mm:00000000b26ab163 type:MM_ANONPAGES val:22 [ 34.160484] BUG: Bad rss-counter state mm:000000009023a0d4 type:MM_FILEPAGES val:33 [ 34.161263] BUG: Bad rss-counter state mm:000000009023a0d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53203' (ECDSA) to the list of known hosts. 2023/06/20 08:23:43 fuzzer started 2023/06/20 08:23:43 dialing manager at localhost:44161 2023/06/20 08:23:43 checking machine... 2023/06/20 08:23:43 checking revisions... [ 34.678284] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:23:43 testing simple program... [ 34.713660] cgroup: Unknown subsys name 'net' [ 34.746865] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:23:42 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88801585fc60 RBP=0000000000000025 RSP=ffff88801585fce8 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88801585fc30 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000001 R14=0000000000000001 R15=0000000000000001 RIP=ffffffff814c07eb RFL=00000292 [--S-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 00007f74aabfc900 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=00007ffece7cb000 CR3=000000000d5fa000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=ffff888008c58400 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=00007f258abeb310 CR3=000000000d78a000 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=12a2af5557e726a4ea4fe69a55cee210 XMM02=000000000011bd38eff9b2d0a8fce9cb XMM03=000000000011be082c67c8bc2e329bc3 XMM04=16cff814cd1300aa00000000000ae988 XMM05=53ca43e46baf97db0000000000133f70 XMM06=4fda316b135da52b0000000000133010 XMM07=e042d86d42eb936e0000000000123898 XMM08=790105d8d4335723000000000011be08 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000