syzkaller login: [ 38.826908] BUG: Bad rss-counter state mm:00000000f7f2aee0 type:MM_FILEPAGES val:33 [ 38.828754] BUG: Bad rss-counter state mm:00000000f7f2aee0 type:MM_ANONPAGES val:22 [ 38.989731] ================================================================== [ 38.990822] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.991933] Read of size 8 at addr ffff88800feac6b0 by task sshd/220 [ 38.993053] [ 38.993318] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.994217] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.995216] Call Trace: [ 38.995531] [ 38.995813] dump_stack_lvl+0x91/0xf0 [ 38.996308] print_report+0xcc/0x620 [ 38.996794] ? __virt_addr_valid+0x102/0x340 [ 38.997359] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.997975] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.998587] kasan_report+0xbe/0xf0 [ 38.999063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.999678] vma_interval_tree_remove+0xc75/0xec0 [ 39.000281] vma_prepare+0xc54/0x11a0 [ 39.000761] __split_vma+0x5af/0x950 [ 39.001248] ? __pfx___split_vma+0x10/0x10 [ 39.001772] ? find_held_lock+0x2c/0x110 [ 39.002292] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.002857] ? lock_is_held_type+0x9f/0x120 [ 39.003399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.004003] ? mtree_range_walk+0x632/0x900 [ 39.004554] ? mas_walk+0x5c7/0x7c0 [ 39.005052] do_vmi_munmap+0x1f1/0x2b0 [ 39.005543] mmap_region+0x1f9/0x2660 [ 39.006026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.006537] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.007257] ? __pfx_lock_acquire+0x10/0x10 [ 39.007794] ? __pfx_mmap_region+0x10/0x10 [ 39.008325] ? security_mmap_addr+0x7d/0xa0 [ 39.008858] ? get_unmapped_area+0x1f5/0x3f0 [ 39.009419] do_mmap+0x854/0xf00 [ 39.009850] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.010348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.010911] ksys_mmap_pgoff+0x3af/0x500 [ 39.011427] do_syscall_64+0x3f/0x90 [ 39.011935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.012593] RIP: 0033:0x7f1385a59d82 [ 39.013065] 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 [ 39.015209] RSP: 002b:00007ffe795126c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.016120] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1385a59d82 [ 39.016968] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1384e93000 [ 39.017837] RBP: 00007f1384e93000 R08: 0000000000000009 R09: 0000000000001000 [ 39.018691] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d61ff31b20 [ 39.019547] R13: 00007ffe795126e0 R14: 00007ffe79512710 R15: 00007ffe79512a70 [ 39.020409] [ 39.020700] [ 39.020915] Allocated by task 213: [ 39.021360] kasan_save_stack+0x22/0x50 [ 39.021864] kasan_set_track+0x25/0x30 [ 39.022357] __kasan_slab_alloc+0x59/0x70 [ 39.022884] kmem_cache_alloc+0x16b/0x370 [ 39.023405] vm_area_dup+0x20/0x160 [ 39.023859] __split_vma+0x170/0x950 [ 39.024332] split_vma+0xc6/0x110 [ 39.024770] mprotect_fixup+0x8d2/0xb30 [ 39.025277] do_mprotect_pkey+0x87e/0xd40 [ 39.025799] __x64_sys_mprotect+0x78/0xc0 [ 39.026317] do_syscall_64+0x3f/0x90 [ 39.026786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027426] [ 39.027640] Freed by task 213: [ 39.028031] kasan_save_stack+0x22/0x50 [ 39.028532] kasan_set_track+0x25/0x30 [ 39.029040] kasan_save_free_info+0x2b/0x50 [ 39.029574] __kasan_slab_free+0x10a/0x190 [ 39.030111] kmem_cache_free+0x10d/0x4d0 [ 39.030618] rcu_core+0x8c8/0x2860 [ 39.031062] __do_softirq+0x1b7/0x7d4 [ 39.031542] [ 39.031755] Last potentially related work creation: [ 39.032342] kasan_save_stack+0x22/0x50 [ 39.032843] __kasan_record_aux_stack+0x8e/0xa0 [ 39.033503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.034144] remove_vma+0x139/0x170 [ 39.034594] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.035149] do_vmi_munmap+0x1f1/0x2b0 [ 39.035634] __vm_munmap+0x138/0x3a0 [ 39.036098] __x64_sys_munmap+0x59/0x80 [ 39.036591] do_syscall_64+0x3f/0x90 [ 39.037091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.037747] [ 39.037979] The buggy address belongs to the object at ffff88800feac658 [ 39.037979] which belongs to the cache vm_area_struct of size 168 [ 39.039569] The buggy address is located 88 bytes inside of [ 39.039569] freed 168-byte region [ffff88800feac658, ffff88800feac700) [ 39.041129] [ 39.041363] The buggy address belongs to the physical page: [ 39.042101] page:000000003df6b91d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfeac [ 39.043281] memcg:ffff88801a17cc01 [ 39.043752] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.044508] page_type: 0xffffffff() [ 39.045002] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 39.045985] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a17cc01 [ 39.046888] page dumped because: kasan: bad access detected [ 39.047546] [ 39.047760] Memory state around the buggy address: [ 39.048340] ffff88800feac580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.049221] ffff88800feac600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.050081] >ffff88800feac680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.050922] ^ [ 39.051506] ffff88800feac700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.052359] ffff88800feac780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.053213] ================================================================== [ 39.054259] Disabling lock debugging due to kernel taint [ 41.000418] BUG: Bad rss-counter state mm:00000000655ec94f type:MM_FILEPAGES val:33 [ 41.001432] BUG: Bad rss-counter state mm:00000000655ec94f type:MM_ANONPAGES val:22 [ 41.467693] BUG: Bad rss-counter state mm:00000000bfd793b8 type:MM_FILEPAGES val:33 [ 41.469264] BUG: Bad rss-counter state mm:00000000bfd793b8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3851' (ECDSA) to the list of known hosts. 2023/06/20 12:18:37 fuzzer started 2023/06/20 12:18:38 dialing manager at localhost:36067 2023/06/20 12:18:38 checking machine... 2023/06/20 12:18:38 checking revisions... [ 42.258020] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:18:38 testing simple program... [ 42.303587] cgroup: Unknown subsys name 'net' [ 42.354809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:18:37 Registers: info registers vcpu 0 RAX=00000000000000d9 RBX=0000000000000000 RCX=00000009a6cacaee RDX=0000000000000000 RSI=00000000000000d9 RDI=ffff88806ce3a000 RBP=ffff88806ce09e98 RSP=ffff88806ce09e10 R8 =0000000000000000 R9 =ffff88806ce3a01c R10=0000000000000000 R11=ffff88806ce09ff8 R12=ffff88806ce39500 R13=00000000000002b2 R14=ffff88806ce39500 R15=00000000000001d9 RIP=ffffffff81294cbe RFL=00000093 [--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 =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=00007f0bf2e8a8c0 CR3=000000000f0a8000 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=2037333a38313a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38313a3231203032 XMM08=00007fb4e40044200000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888016ed3680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffff888016ed3a74 RBP=ffff888016ed3680 RSP=ffff888019717208 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007f8c97f58366 R13=0000000000000000 R14=ffff888016ed3680 R15=ffff88800f19a260 RIP=ffffffff8135bdea RFL=00000217 [----APC] 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 00007f8c97a65900 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=00007ffdbb03e000 CR3=000000000f786000 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=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