syzkaller login: [ 28.809611] BUG: Bad rss-counter state mm:00000000c7aa4140 type:MM_FILEPAGES val:33 [ 28.810832] BUG: Bad rss-counter state mm:00000000c7aa4140 type:MM_ANONPAGES val:22 [ 28.979788] ================================================================== [ 28.980907] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.982193] Read of size 8 at addr ffff88800e01fed8 by task sshd/221 [ 28.983136] [ 28.983403] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.984529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.985757] Call Trace: [ 28.986153] <TASK> [ 28.986476] dump_stack_lvl+0x91/0xf0 [ 28.987013] print_report+0xcc/0x620 [ 28.987543] ? __virt_addr_valid+0x102/0x340 [ 28.988152] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.988831] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.989525] kasan_report+0xbe/0xf0 [ 28.990055] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.990731] vma_interval_tree_remove+0xc75/0xec0 [ 28.991393] vma_prepare+0xc54/0x11a0 [ 28.991924] __split_vma+0x5af/0x950 [ 28.992441] ? __pfx___split_vma+0x10/0x10 [ 28.993024] ? find_held_lock+0x2c/0x110 [ 28.993604] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.994225] ? lock_is_held_type+0x9f/0x120 [ 28.994824] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.995479] ? mtree_range_walk+0x632/0x900 [ 28.996088] ? mas_walk+0x5c7/0x7c0 [ 28.996616] do_vmi_munmap+0x1f1/0x2b0 [ 28.997161] mmap_region+0x1f9/0x2660 [ 28.997714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.998275] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.999063] ? __pfx_lock_acquire+0x10/0x10 [ 28.999653] ? __pfx_mmap_region+0x10/0x10 [ 29.000233] ? security_mmap_addr+0x7d/0xa0 [ 29.000820] ? get_unmapped_area+0x1f5/0x3f0 [ 29.001425] do_mmap+0x854/0xf00 [ 29.001909] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.002449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.003072] ksys_mmap_pgoff+0x3af/0x500 [ 29.003630] do_syscall_64+0x3f/0x90 [ 29.004159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.004877] RIP: 0033:0x7f0672d43d82 [ 29.005388] 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 [ 29.007758] RSP: 002b:00007ffe268415d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.008762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0672d43d82 [ 29.009704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f067217d000 [ 29.010641] RBP: 00007f067217d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.011575] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b5ace7ec0 [ 29.012508] R13: 00007ffe268415f0 R14: 00007ffe26841620 R15: 00007ffe26841980 [ 29.013456] </TASK> [ 29.013806] [ 29.014041] Allocated by task 214: [ 29.014513] kasan_save_stack+0x22/0x50 [ 29.015070] kasan_set_track+0x25/0x30 [ 29.015619] __kasan_slab_alloc+0x59/0x70 [ 29.016201] kmem_cache_alloc+0x16b/0x370 [ 29.016774] vm_area_dup+0x20/0x160 [ 29.017274] __split_vma+0x170/0x950 [ 29.017798] split_vma+0xc6/0x110 [ 29.018277] mprotect_fixup+0x8d2/0xb30 [ 29.018831] do_mprotect_pkey+0x87e/0xd40 [ 29.019400] __x64_sys_mprotect+0x78/0xc0 [ 29.019975] do_syscall_64+0x3f/0x90 [ 29.020502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.021214] [ 29.021450] Freed by task 19: [ 29.021880] kasan_save_stack+0x22/0x50 [ 29.022427] kasan_set_track+0x25/0x30 [ 29.023028] kasan_save_free_info+0x2b/0x50 [ 29.023614] __kasan_slab_free+0x10a/0x190 [ 29.024204] kmem_cache_free+0x10d/0x4d0 [ 29.024760] rcu_core+0x8c8/0x2860 [ 29.025249] __do_softirq+0x1b7/0x7d4 [ 29.025782] [ 29.026020] Last potentially related work creation: [ 29.026668] kasan_save_stack+0x22/0x50 [ 29.027224] __kasan_record_aux_stack+0x8e/0xa0 [ 29.027863] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.028572] remove_vma+0x139/0x170 [ 29.029072] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.029693] do_vmi_munmap+0x1f1/0x2b0 [ 29.030232] __vm_munmap+0x138/0x3a0 [ 29.030751] __x64_sys_munmap+0x59/0x80 [ 29.031293] do_syscall_64+0x3f/0x90 [ 29.031818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.032523] [ 29.032754] Second to last potentially related work creation: [ 29.033503] kasan_save_stack+0x22/0x50 [ 29.034088] __kasan_record_aux_stack+0x8e/0xa0 [ 29.034726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.035438] remove_vma+0x139/0x170 [ 29.035934] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.036542] do_vmi_munmap+0x1f1/0x2b0 [ 29.037081] mmap_region+0x1f9/0x2660 [ 29.037611] do_mmap+0x854/0xf00 [ 29.038092] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.038631] ksys_mmap_pgoff+0x3af/0x500 [ 29.039182] do_syscall_64+0x3f/0x90 [ 29.039702] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.040412] [ 29.040647] The buggy address belongs to the object at ffff88800e01fe80 [ 29.040647] which belongs to the cache vm_area_struct of size 168 [ 29.042283] The buggy address is located 88 bytes inside of [ 29.042283] freed 168-byte region [ffff88800e01fe80, ffff88800e01ff28) [ 29.043843] [ 29.044080] The buggy address belongs to the physical page: [ 29.044803] page:00000000d6ecde44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01f [ 29.046021] memcg:ffff888009538701 [ 29.046495] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 29.047270] page_type: 0xffffffff() [ 29.047772] raw: 0100000000000200 ffff8880087a0c80 ffffea0000385900 dead000000000005 [ 29.048788] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009538701 [ 29.049800] page dumped because: kasan: bad access detected [ 29.050528] [ 29.050766] Memory state around the buggy address: [ 29.051408] ffff88800e01fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.052363] ffff88800e01fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.053310] >ffff88800e01fe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.054267] ^ [ 29.055076] ffff88800e01ff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 29.056021] ffff88800e01ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.056957] ================================================================== [ 29.058149] Disabling lock debugging due to kernel taint [ 30.589094] BUG: Bad rss-counter state mm:000000004d6094f3 type:MM_FILEPAGES val:33 [ 30.589647] BUG: Bad rss-counter state mm:000000004d6094f3 type:MM_ANONPAGES val:22 [ 30.983919] BUG: Bad rss-counter state mm:0000000098ceddc3 type:MM_FILEPAGES val:33 [ 30.984637] BUG: Bad rss-counter state mm:0000000098ceddc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55060' (ECDSA) to the list of known hosts. 2023/06/20 17:15:11 fuzzer started 2023/06/20 17:15:11 dialing manager at localhost:36067 2023/06/20 17:15:12 checking machine... 2023/06/20 17:15:12 checking revisions... [ 31.618202] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:15:12 testing simple program... [ 31.668630] cgroup: Unknown subsys name 'net' [ 31.717668] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:15:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001f1bf0a RSI=ffffffff838728bc RDI=ffff88800f8df810 RBP=ffff88800f8df868 RSP=ffff88800f8df7a0 R8 =0000000000000001 R9 =ffff88800f8df850 R10=0000000000038001 R11=000000000008b5b9 R12=ffff88800f8df870 R13=ffff88800f8df858 R14=ffff88800f8df851 R15=ffff88800f8df810 RIP=ffffffff811306da RFL=00000216 [----AP-] 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 00007fb16d9b6900 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=00007ffc86360000 CR3=0000000016b52000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8c9c84c8b0 CR3=000000000eefa000 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=2031313a35313a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3233 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3233325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a35313a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000