syzkaller login: [ 31.140569] BUG: Bad rss-counter state mm:00000000f1c2ac4f type:MM_FILEPAGES val:33 [ 31.142338] BUG: Bad rss-counter state mm:00000000f1c2ac4f type:MM_ANONPAGES val:22 [ 31.311196] ================================================================== [ 31.312261] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.313373] Read of size 8 at addr ffff88800e274228 by task sshd/220 [ 31.314452] [ 31.314716] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.315738] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.316856] Call Trace: [ 31.317187] [ 31.317482] dump_stack_lvl+0x91/0xf0 [ 31.318008] print_report+0xcc/0x620 [ 31.318513] ? __virt_addr_valid+0x102/0x340 [ 31.319092] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.319729] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.320379] kasan_report+0xbe/0xf0 [ 31.320887] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321552] vma_interval_tree_remove+0xc75/0xec0 [ 31.322201] vma_prepare+0xc54/0x11a0 [ 31.322707] __split_vma+0x5af/0x950 [ 31.323208] ? __pfx___split_vma+0x10/0x10 [ 31.323777] ? find_held_lock+0x2c/0x110 [ 31.324336] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.324943] ? lock_is_held_type+0x9f/0x120 [ 31.325523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.326189] ? mtree_range_walk+0x632/0x900 [ 31.326783] ? mas_walk+0x5c7/0x7c0 [ 31.327287] do_vmi_munmap+0x1f1/0x2b0 [ 31.327809] mmap_region+0x1f9/0x2660 [ 31.328324] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.328859] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.329623] ? __pfx_lock_acquire+0x10/0x10 [ 31.330203] ? __pfx_mmap_region+0x10/0x10 [ 31.330772] ? security_mmap_addr+0x7d/0xa0 [ 31.331335] ? get_unmapped_area+0x1f5/0x3f0 [ 31.331916] do_mmap+0x854/0xf00 [ 31.332382] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.332903] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.333494] ksys_mmap_pgoff+0x3af/0x500 [ 31.334040] do_syscall_64+0x3f/0x90 [ 31.334539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.335226] RIP: 0033:0x7f0beb8f3d82 [ 31.335705] 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 [ 31.337940] RSP: 002b:00007ffceebfe108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.338893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0beb8f3d82 [ 31.339790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0bead2d000 [ 31.340692] RBP: 00007f0bead2d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.341591] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a62e31ec0 [ 31.342484] R13: 00007ffceebfe120 R14: 00007ffceebfe150 R15: 00007ffceebfe4b0 [ 31.343391] [ 31.343697] [ 31.343920] Allocated by task 213: [ 31.344365] kasan_save_stack+0x22/0x50 [ 31.344894] kasan_set_track+0x25/0x30 [ 31.345410] __kasan_slab_alloc+0x59/0x70 [ 31.345954] kmem_cache_alloc+0x16b/0x370 [ 31.346495] vm_area_dup+0x20/0x160 [ 31.346965] __split_vma+0x170/0x950 [ 31.347452] split_vma+0xc6/0x110 [ 31.347910] mprotect_fixup+0x8d2/0xb30 [ 31.348434] do_mprotect_pkey+0x87e/0xd40 [ 31.348978] __x64_sys_mprotect+0x78/0xc0 [ 31.349526] do_syscall_64+0x3f/0x90 [ 31.350050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.350729] [ 31.350961] Freed by task 213: [ 31.351363] kasan_save_stack+0x22/0x50 [ 31.351877] kasan_set_track+0x25/0x30 [ 31.352386] kasan_save_free_info+0x2b/0x50 [ 31.352936] __kasan_slab_free+0x10a/0x190 [ 31.353483] kmem_cache_free+0x10d/0x4d0 [ 31.354009] rcu_core+0x8c8/0x2860 [ 31.354533] __do_softirq+0x1b7/0x7d4 [ 31.355021] [ 31.355240] Last potentially related work creation: [ 31.355834] kasan_save_stack+0x22/0x50 [ 31.356346] __kasan_record_aux_stack+0x8e/0xa0 [ 31.356932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.357585] remove_vma+0x139/0x170 [ 31.358064] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.358632] do_vmi_munmap+0x1f1/0x2b0 [ 31.359128] __vm_munmap+0x138/0x3a0 [ 31.359602] __x64_sys_munmap+0x59/0x80 [ 31.360106] do_syscall_64+0x3f/0x90 [ 31.360585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361234] [ 31.361451] The buggy address belongs to the object at ffff88800e2741d0 [ 31.361451] which belongs to the cache vm_area_struct of size 168 [ 31.362948] The buggy address is located 88 bytes inside of [ 31.362948] freed 168-byte region [ffff88800e2741d0, ffff88800e274278) [ 31.364375] [ 31.364593] The buggy address belongs to the physical page: [ 31.365259] page:0000000017e4e092 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe274 [ 31.366368] memcg:ffff888019ed0101 [ 31.366799] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.367449] page_type: 0xffffffff() [ 31.367901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.368833] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ed0101 [ 31.369740] page dumped because: kasan: bad access detected [ 31.370416] [ 31.370636] Memory state around the buggy address: [ 31.371218] ffff88800e274100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.372082] ffff88800e274180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.372937] >ffff88800e274200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.373797] ^ [ 31.374367] ffff88800e274280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.375223] ffff88800e274300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.376082] ================================================================== [ 31.377142] Disabling lock debugging due to kernel taint [ 33.864205] BUG: Bad rss-counter state mm:000000005b9531c9 type:MM_FILEPAGES val:33 [ 33.864732] BUG: Bad rss-counter state mm:000000005b9531c9 type:MM_ANONPAGES val:22 [ 34.339158] BUG: Bad rss-counter state mm:00000000d0a52fd4 type:MM_FILEPAGES val:33 [ 34.340303] BUG: Bad rss-counter state mm:00000000d0a52fd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8470' (ECDSA) to the list of known hosts. 2023/06/21 01:14:49 fuzzer started 2023/06/21 01:14:49 dialing manager at localhost:36067 2023/06/21 01:14:49 checking machine... 2023/06/21 01:14:49 checking revisions... [ 35.038793] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:14:50 testing simple program... [ 35.093393] cgroup: Unknown subsys name 'net' [ 35.139892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:14:49 Registers: info registers vcpu 0 RAX=0000000000000005 RBX=0000000000000001 RCX=ffffffff818e31f6 RDX=000000000000000b RSI=ffffffff8614eccc RDI=ffffffff85e0c99c RBP=ffffffff85e0c99c RSP=ffff8880169cf840 R8 =ffffffff8614eccc R9 =ffff8880169cf938 R10=0000000000038001 R11=00000000000247f6 R12=ffffffff85e0c9c8 R13=ffffffff85e0c99c R14=ffffffff85e0c99c R15=dffffc0000000000 RIP=ffffffff8112fc6e 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 00007f04e9d60900 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=00007fffd1237000 CR3=0000000019e98000 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=00007f18be7bda90 CR3=000000000fb5c000 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=2039343a34313a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a34313a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000