syzkaller login: [ 31.762909] BUG: Bad rss-counter state mm:000000002201a622 type:MM_FILEPAGES val:33 [ 31.765043] BUG: Bad rss-counter state mm:000000002201a622 type:MM_ANONPAGES val:22 [ 31.934185] ================================================================== [ 31.935268] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.936412] Read of size 8 at addr ffff888019ebfa50 by task sshd/222 [ 31.937280] [ 31.937523] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.938474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.939596] Call Trace: [ 31.939961] [ 31.940284] dump_stack_lvl+0x91/0xf0 [ 31.940849] print_report+0xcc/0x620 [ 31.941396] ? __virt_addr_valid+0x102/0x340 [ 31.942028] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.942715] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.943415] kasan_report+0xbe/0xf0 [ 31.943948] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.944658] vma_interval_tree_remove+0xc75/0xec0 [ 31.945344] vma_prepare+0xc54/0x11a0 [ 31.945897] __split_vma+0x5af/0x950 [ 31.946450] ? __pfx___split_vma+0x10/0x10 [ 31.947059] ? find_held_lock+0x2c/0x110 [ 31.947680] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.948323] ? lock_is_held_type+0x9f/0x120 [ 31.948938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.949637] ? mtree_range_walk+0x632/0x900 [ 31.950269] ? mas_walk+0x5c7/0x7c0 [ 31.950817] do_vmi_munmap+0x1f1/0x2b0 [ 31.951398] mmap_region+0x1f9/0x2660 [ 31.951950] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.952556] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.953374] ? __pfx_lock_acquire+0x10/0x10 [ 31.953980] ? __pfx_mmap_region+0x10/0x10 [ 31.954585] ? security_mmap_addr+0x7d/0xa0 [ 31.955197] ? get_unmapped_area+0x1f5/0x3f0 [ 31.955833] do_mmap+0x854/0xf00 [ 31.956337] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.956904] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.957547] ksys_mmap_pgoff+0x3af/0x500 [ 31.958128] do_syscall_64+0x3f/0x90 [ 31.958675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.959428] RIP: 0033:0x7fcb884e2d82 [ 31.959943] 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 [ 31.962318] RSP: 002b:00007fff7439a898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.963336] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb884e2d82 [ 31.964317] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb8791c000 [ 31.965277] RBP: 00007fcb8791c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.966232] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595f9525ec0 [ 31.967204] R13: 00007fff7439a8b0 R14: 00007fff7439a8e0 R15: 00007fff7439ac40 [ 31.968170] [ 31.968506] [ 31.968748] Allocated by task 215: [ 31.969235] kasan_save_stack+0x22/0x50 [ 31.969806] kasan_set_track+0x25/0x30 [ 31.970370] __kasan_slab_alloc+0x59/0x70 [ 31.970965] kmem_cache_alloc+0x16b/0x370 [ 31.971607] vm_area_dup+0x20/0x160 [ 31.972114] __split_vma+0x170/0x950 [ 31.972639] split_vma+0xc6/0x110 [ 31.973130] mprotect_fixup+0x8d2/0xb30 [ 31.973698] do_mprotect_pkey+0x87e/0xd40 [ 31.974278] __x64_sys_mprotect+0x78/0xc0 [ 31.974865] do_syscall_64+0x3f/0x90 [ 31.975406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.976117] [ 31.976357] Freed by task 215: [ 31.976795] kasan_save_stack+0x22/0x50 [ 31.977359] kasan_set_track+0x25/0x30 [ 31.977908] kasan_save_free_info+0x2b/0x50 [ 31.978494] __kasan_slab_free+0x10a/0x190 [ 31.979090] kmem_cache_free+0x10d/0x4d0 [ 31.979681] rcu_core+0x8c8/0x2860 [ 31.980184] __do_softirq+0x1b7/0x7d4 [ 31.980720] [ 31.980956] Last potentially related work creation: [ 31.981611] kasan_save_stack+0x22/0x50 [ 31.982164] __kasan_record_aux_stack+0x8e/0xa0 [ 31.982801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.983539] remove_vma+0x139/0x170 [ 31.984054] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.984681] do_vmi_munmap+0x1f1/0x2b0 [ 31.985234] __vm_munmap+0x138/0x3a0 [ 31.985753] __x64_sys_munmap+0x59/0x80 [ 31.986322] do_syscall_64+0x3f/0x90 [ 31.986860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.987593] [ 31.987831] The buggy address belongs to the object at ffff888019ebf9f8 [ 31.987831] which belongs to the cache vm_area_struct of size 168 [ 31.989496] The buggy address is located 88 bytes inside of [ 31.989496] freed 168-byte region [ffff888019ebf9f8, ffff888019ebfaa0) [ 31.991087] [ 31.991328] The buggy address belongs to the physical page: [ 31.992098] page:00000000d84eaa24 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ebf [ 31.993328] memcg:ffff88800d87b201 [ 31.993808] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.994538] page_type: 0xffffffff() [ 31.995042] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.996098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d87b201 [ 31.997116] page dumped because: kasan: bad access detected [ 31.997859] [ 31.998097] Memory state around the buggy address: [ 31.998753] ffff888019ebf900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.999733] ffff888019ebf980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.000695] >ffff888019ebfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.001638] ^ [ 32.002417] ffff888019ebfa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.003380] ffff888019ebfb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.004329] ================================================================== [ 32.005474] Disabling lock debugging due to kernel taint [ 34.027837] BUG: Bad rss-counter state mm:000000000a662a58 type:MM_FILEPAGES val:33 [ 34.029302] BUG: Bad rss-counter state mm:000000000a662a58 type:MM_ANONPAGES val:22 [ 34.615314] BUG: Bad rss-counter state mm:00000000994c2364 type:MM_FILEPAGES val:33 [ 34.616545] BUG: Bad rss-counter state mm:00000000994c2364 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20732' (ECDSA) to the list of known hosts. 2023/06/19 11:20:33 fuzzer started 2023/06/19 11:20:34 dialing manager at localhost:44161 2023/06/19 11:20:34 checking machine... 2023/06/19 11:20:34 checking revisions... [ 35.262793] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:20:34 testing simple program... [ 35.312293] cgroup: Unknown subsys name 'net' [ 35.362450] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:20:33 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=00007fd7586c8430 CR3=0000000016aa8000 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=2033333a30323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a30323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff836382d7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000091aff R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff88800d729b40 R15=ffff88800f19be00 RIP=ffffffff813ad42e RFL=00000286 [--S--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 00007f77e0541900 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=00007ffdea137000 CR3=000000000f66a000 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=6720646572637465733a4d41503d706f 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