syzkaller login: [ 29.848195] sshd (213) used greatest stack depth: 24128 bytes left [ 29.849343] BUG: Bad rss-counter state mm:00000000e0a28c1b type:MM_FILEPAGES val:33 [ 29.850988] BUG: Bad rss-counter state mm:00000000e0a28c1b type:MM_ANONPAGES val:22 [ 29.977756] ================================================================== [ 29.978452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.979163] Read of size 8 at addr ffff88800948d310 by task sshd/221 [ 29.979745] [ 29.979916] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.980698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.981448] Call Trace: [ 29.981696] [ 29.981915] dump_stack_lvl+0x91/0xf0 [ 29.982293] print_report+0xcc/0x620 [ 29.982661] ? __virt_addr_valid+0x102/0x340 [ 29.983082] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.983557] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.984027] kasan_report+0xbe/0xf0 [ 29.984405] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.984877] vma_interval_tree_remove+0xc75/0xec0 [ 29.985342] vma_prepare+0xc54/0x11a0 [ 29.985710] __split_vma+0x5af/0x950 [ 29.986072] ? __pfx___split_vma+0x10/0x10 [ 29.986483] ? find_held_lock+0x2c/0x110 [ 29.986884] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.987319] ? lock_is_held_type+0x9f/0x120 [ 29.987734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.988204] ? mtree_range_walk+0x632/0x900 [ 29.988652] ? mas_walk+0x5c7/0x7c0 [ 29.989015] do_vmi_munmap+0x1f1/0x2b0 [ 29.989395] mmap_region+0x1f9/0x2660 [ 29.989765] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.990160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.990714] ? __pfx_lock_acquire+0x10/0x10 [ 29.991128] ? __pfx_mmap_region+0x10/0x10 [ 29.991539] ? security_mmap_addr+0x7d/0xa0 [ 29.991959] ? get_unmapped_area+0x1f5/0x3f0 [ 29.992392] do_mmap+0x854/0xf00 [ 29.992728] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.993114] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.993544] ksys_mmap_pgoff+0x3af/0x500 [ 29.993935] do_syscall_64+0x3f/0x90 [ 29.994302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.994794] RIP: 0033:0x7f9083129d82 [ 29.995148] 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 [ 29.996800] RSP: 002b:00007ffca289c118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.997508] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9083129d82 [ 29.998169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9082563000 [ 29.998828] RBP: 00007f9082563000 R08: 0000000000000009 R09: 0000000000001000 [ 29.999482] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625a9d52ec0 [ 30.000142] R13: 00007ffca289c130 R14: 00007ffca289c160 R15: 00007ffca289c4c0 [ 30.000826] [ 30.001052] [ 30.001220] Allocated by task 213: [ 30.001552] kasan_save_stack+0x22/0x50 [ 30.001937] kasan_set_track+0x25/0x30 [ 30.002318] __kasan_slab_alloc+0x59/0x70 [ 30.002717] kmem_cache_alloc+0x16b/0x370 [ 30.003118] vm_area_dup+0x20/0x160 [ 30.003469] __split_vma+0x170/0x950 [ 30.003830] split_vma+0xc6/0x110 [ 30.004172] mprotect_fixup+0x8d2/0xb30 [ 30.004571] do_mprotect_pkey+0x87e/0xd40 [ 30.004972] __x64_sys_mprotect+0x78/0xc0 [ 30.005371] do_syscall_64+0x3f/0x90 [ 30.005733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.006229] [ 30.006397] Freed by task 213: [ 30.006700] kasan_save_stack+0x22/0x50 [ 30.007085] kasan_set_track+0x25/0x30 [ 30.007465] kasan_save_free_info+0x2b/0x50 [ 30.007875] __kasan_slab_free+0x10a/0x190 [ 30.008302] kmem_cache_free+0x10d/0x4d0 [ 30.008693] rcu_core+0x8c8/0x2860 [ 30.009034] __do_softirq+0x1b7/0x7d4 [ 30.009406] [ 30.009572] Last potentially related work creation: [ 30.010025] kasan_save_stack+0x22/0x50 [ 30.010412] __kasan_record_aux_stack+0x8e/0xa0 [ 30.010858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.011357] remove_vma+0x139/0x170 [ 30.011705] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.012139] do_vmi_munmap+0x1f1/0x2b0 [ 30.012528] __vm_munmap+0x138/0x3a0 [ 30.012887] __x64_sys_munmap+0x59/0x80 [ 30.013267] do_syscall_64+0x3f/0x90 [ 30.013633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.014128] [ 30.014293] Second to last potentially related work creation: [ 30.014818] kasan_save_stack+0x22/0x50 [ 30.015210] __kasan_record_aux_stack+0x8e/0xa0 [ 30.015651] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.016149] remove_vma+0x139/0x170 [ 30.016506] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.016938] do_vmi_munmap+0x1f1/0x2b0 [ 30.017315] mmap_region+0x1f9/0x2660 [ 30.017683] do_mmap+0x854/0xf00 [ 30.018017] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.018396] ksys_mmap_pgoff+0x3af/0x500 [ 30.018785] do_syscall_64+0x3f/0x90 [ 30.019152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.019648] [ 30.019811] The buggy address belongs to the object at ffff88800948d2b8 [ 30.019811] which belongs to the cache vm_area_struct of size 168 [ 30.020962] The buggy address is located 88 bytes inside of [ 30.020962] freed 168-byte region [ffff88800948d2b8, ffff88800948d360) [ 30.022048] [ 30.022214] The buggy address belongs to the physical page: [ 30.022725] page:000000001725f538 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x948d [ 30.023562] memcg:ffff88800c56ba01 [ 30.023893] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.024400] page_type: 0xffffffff() [ 30.024749] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.025453] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c56ba01 [ 30.026154] page dumped because: kasan: bad access detected [ 30.026665] [ 30.026830] Memory state around the buggy address: [ 30.027281] ffff88800948d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.027943] ffff88800948d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.028615] >ffff88800948d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.029273] ^ [ 30.029632] ffff88800948d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.030294] ffff88800948d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.030953] ================================================================== [ 30.031699] Disabling lock debugging due to kernel taint [ 31.970834] BUG: Bad rss-counter state mm:00000000a9a3e866 type:MM_FILEPAGES val:33 [ 31.971814] BUG: Bad rss-counter state mm:00000000a9a3e866 type:MM_ANONPAGES val:22 [ 32.487141] BUG: Bad rss-counter state mm:00000000227fa958 type:MM_FILEPAGES val:33 [ 32.488351] BUG: Bad rss-counter state mm:00000000227fa958 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20232' (ECDSA) to the list of known hosts. 2023/06/19 17:26:01 fuzzer started 2023/06/19 17:26:02 dialing manager at localhost:44161 2023/06/19 17:26:02 checking machine... 2023/06/19 17:26:02 checking revisions... [ 33.185467] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:26:02 testing simple program... [ 33.242422] cgroup: Unknown subsys name 'net' [ 33.284718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:26:00 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801586fe20 RCX=0000000000000000 RDX=ffff88800c4d3680 RSI=ffffffff8449f90d RDI=0000000000000007 RBP=dffffc0000000000 RSP=ffff88801586fd90 R8 =0000000000000007 R9 =0000000000001000 R10=ffff88800ffade1e R11=0000000000000000 R12=ffff88800ffade1e R13=ffffed1002b0dfcb R14=0000000000000002 R15=ffff88801586fe59 RIP=ffffffff8449f912 RFL=00000293 [--S-A-C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fbdf61f2900 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=00007fbdf5675550 CR3=000000000cb82000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ca350d343eea849700000000000ae988 XMM05=6de367e3576fea5e0000000000135a10 XMM06=c291bd5c70af25b90000000000134800 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007effe154a618 CR3=000000000c63a000 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=2031303a36323a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a36323a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000