syzkaller login: [ 38.790338] BUG: Bad rss-counter state mm:00000000c5c5d2f4 type:MM_FILEPAGES val:33 [ 38.791833] BUG: Bad rss-counter state mm:00000000c5c5d2f4 type:MM_ANONPAGES val:22 [ 38.954120] ================================================================== [ 38.955236] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.956388] Read of size 8 at addr ffff88800e025a50 by task sshd/220 [ 38.957535] [ 38.957804] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.958885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.960101] Call Trace: [ 38.960491] [ 38.960844] dump_stack_lvl+0x91/0xf0 [ 38.961428] print_report+0xcc/0x620 [ 38.962013] ? __virt_addr_valid+0x102/0x340 [ 38.962684] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.963426] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.964173] kasan_report+0xbe/0xf0 [ 38.964752] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.965522] vma_interval_tree_remove+0xc75/0xec0 [ 38.966240] vma_prepare+0xc54/0x11a0 [ 38.966814] __split_vma+0x5af/0x950 [ 38.967386] ? __pfx___split_vma+0x10/0x10 [ 38.968057] ? find_held_lock+0x2c/0x110 [ 38.968683] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.969364] ? lock_is_held_type+0x9f/0x120 [ 38.970013] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.970754] ? mtree_range_walk+0x632/0x900 [ 38.971436] ? mas_walk+0x5c7/0x7c0 [ 38.972026] do_vmi_munmap+0x1f1/0x2b0 [ 38.972612] mmap_region+0x1f9/0x2660 [ 38.973196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.973807] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.974689] ? __pfx_lock_acquire+0x10/0x10 [ 38.975338] ? __pfx_mmap_region+0x10/0x10 [ 38.976005] ? security_mmap_addr+0x7d/0xa0 [ 38.976649] ? get_unmapped_area+0x1f5/0x3f0 [ 38.977319] do_mmap+0x854/0xf00 [ 38.977857] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.978459] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.979147] ksys_mmap_pgoff+0x3af/0x500 [ 38.979768] do_syscall_64+0x3f/0x90 [ 38.980339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.981022] RIP: 0033:0x7ff362a51d82 [ 38.981471] 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 [ 38.983608] RSP: 002b:00007fff282809d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.984502] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff362a51d82 [ 38.985348] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff361e8b000 [ 38.986195] RBP: 00007ff361e8b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.987043] R10: 0000000000000812 R11: 0000000000000206 R12: 000056367b26eec0 [ 38.987913] R13: 00007fff282809f0 R14: 00007fff28280a20 R15: 00007fff28280d80 [ 38.988769] [ 38.989057] [ 38.989272] Allocated by task 213: [ 38.989696] kasan_save_stack+0x22/0x50 [ 38.990201] kasan_set_track+0x25/0x30 [ 38.990692] __kasan_slab_alloc+0x59/0x70 [ 38.991228] kmem_cache_alloc+0x16b/0x370 [ 38.991759] vm_area_dup+0x20/0x160 [ 38.992216] __split_vma+0x170/0x950 [ 38.992679] split_vma+0xc6/0x110 [ 38.993117] mprotect_fixup+0x8d2/0xb30 [ 38.993625] do_mprotect_pkey+0x87e/0xd40 [ 38.994149] __x64_sys_mprotect+0x78/0xc0 [ 38.994664] do_syscall_64+0x3f/0x90 [ 38.995133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.995787] [ 38.996007] Freed by task 213: [ 38.996399] kasan_save_stack+0x22/0x50 [ 38.996895] kasan_set_track+0x25/0x30 [ 38.997385] kasan_save_free_info+0x2b/0x50 [ 38.997911] __kasan_slab_free+0x10a/0x190 [ 38.998446] kmem_cache_free+0x10d/0x4d0 [ 38.998954] rcu_core+0x8c8/0x2860 [ 38.999391] __do_softirq+0x1b7/0x7d4 [ 38.999887] [ 39.000105] Last potentially related work creation: [ 39.000691] kasan_save_stack+0x22/0x50 [ 39.001195] __kasan_record_aux_stack+0x8e/0xa0 [ 39.001767] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.002474] remove_vma+0x139/0x170 [ 39.002938] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.003487] do_vmi_munmap+0x1f1/0x2b0 [ 39.003978] __vm_munmap+0x138/0x3a0 [ 39.004441] __x64_sys_munmap+0x59/0x80 [ 39.004946] do_syscall_64+0x3f/0x90 [ 39.005418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.006066] [ 39.006287] Second to last potentially related work creation: [ 39.006972] kasan_save_stack+0x22/0x50 [ 39.007481] __kasan_record_aux_stack+0x8e/0xa0 [ 39.008072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.008716] remove_vma+0x139/0x170 [ 39.009165] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.009725] do_vmi_munmap+0x1f1/0x2b0 [ 39.010219] mmap_region+0x1f9/0x2660 [ 39.010693] do_mmap+0x854/0xf00 [ 39.011121] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.011626] ksys_mmap_pgoff+0x3af/0x500 [ 39.012134] do_syscall_64+0x3f/0x90 [ 39.012606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.013255] [ 39.013471] The buggy address belongs to the object at ffff88800e0259f8 [ 39.013471] which belongs to the cache vm_area_struct of size 168 [ 39.014947] The buggy address is located 88 bytes inside of [ 39.014947] freed 168-byte region [ffff88800e0259f8, ffff88800e025aa0) [ 39.016367] [ 39.016584] The buggy address belongs to the physical page: [ 39.017242] page:0000000086b98f74 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe025 [ 39.018329] memcg:ffff88800df31901 [ 39.018755] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.019401] page_type: 0xffffffff() [ 39.019860] raw: 0100000000000200 ffff8880087a0c80 ffffea0000372880 dead000000000004 [ 39.020777] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df31901 [ 39.021684] page dumped because: kasan: bad access detected [ 39.022342] [ 39.022558] Memory state around the buggy address: [ 39.023138] ffff88800e025900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.024004] ffff88800e025980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 39.024852] >ffff88800e025a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.025703] ^ [ 39.026399] ffff88800e025a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.027260] ffff88800e025b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.028134] ================================================================== [ 39.029059] Disabling lock debugging due to kernel taint [ 41.297586] BUG: Bad rss-counter state mm:00000000aade1ce5 type:MM_FILEPAGES val:33 [ 41.298578] BUG: Bad rss-counter state mm:00000000aade1ce5 type:MM_ANONPAGES val:22 [ 41.777779] BUG: Bad rss-counter state mm:000000000bcc1f6a type:MM_FILEPAGES val:33 [ 41.778961] BUG: Bad rss-counter state mm:000000000bcc1f6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42132' (ECDSA) to the list of known hosts. 2023/06/20 22:09:56 fuzzer started 2023/06/20 22:09:56 dialing manager at localhost:36067 2023/06/20 22:09:56 checking machine... 2023/06/20 22:09:56 checking revisions... [ 42.499035] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:09:56 testing simple program... [ 42.535334] cgroup: Unknown subsys name 'net' [ 42.584498] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:09:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880147c8080 RCX=0000000000000100 RDX=1ffff110028f7033 RSI=ffffffff81252670 RDI=ffff8880147b8198 RBP=ffff8880147b8000 RSP=ffff88806ce09bd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c04000 R12=00000000000027f6 R13=ffff8880147b8138 R14=ffff8880147c80d0 R15=0000000000000009 RIP=ffffffff812526ce RFL=00000046 [---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 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=00007ffd2044e908 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007fd0b4d3f5100000561b7d017790 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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000054 RCX=dffffc0000000000 RDX=ffff88800dc61b40 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=0000000000000055 RSP=ffff8880102af7c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99d80 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c87 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 00007fd4eeead900 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=00007fd4ef464618 CR3=000000000e26c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000