syzkaller login: [ 31.667610] BUG: Bad rss-counter state mm:00000000dd4c85bd type:MM_FILEPAGES val:33 [ 31.668826] BUG: Bad rss-counter state mm:00000000dd4c85bd type:MM_ANONPAGES val:22 [ 31.734495] ================================================================== [ 31.735405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.736351] Read of size 8 at addr ffff88800f0d5798 by task sshd/220 [ 31.737135] [ 31.737354] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.738261] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.739268] Call Trace: [ 31.739605] [ 31.739889] dump_stack_lvl+0x91/0xf0 [ 31.740387] print_report+0xcc/0x620 [ 31.740885] ? __virt_addr_valid+0x102/0x340 [ 31.741441] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742077] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.742743] kasan_report+0xbe/0xf0 [ 31.743226] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.743857] vma_interval_tree_remove+0xc75/0xec0 [ 31.744464] vma_prepare+0xc54/0x11a0 [ 31.744955] __split_vma+0x5af/0x950 [ 31.745432] ? __pfx___split_vma+0x10/0x10 [ 31.745977] ? find_held_lock+0x2c/0x110 [ 31.746527] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.747122] ? lock_is_held_type+0x9f/0x120 [ 31.747676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.748288] ? mtree_range_walk+0x632/0x900 [ 31.748851] ? mas_walk+0x5c7/0x7c0 [ 31.749333] do_vmi_munmap+0x1f1/0x2b0 [ 31.749847] mmap_region+0x1f9/0x2660 [ 31.750334] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.750884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.751625] ? __pfx_lock_acquire+0x10/0x10 [ 31.752159] ? __pfx_mmap_region+0x10/0x10 [ 31.752706] ? security_mmap_addr+0x7d/0xa0 [ 31.753245] ? get_unmapped_area+0x1f5/0x3f0 [ 31.753817] do_mmap+0x854/0xf00 [ 31.754263] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.754793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.755359] ksys_mmap_pgoff+0x3af/0x500 [ 31.755885] do_syscall_64+0x3f/0x90 [ 31.756367] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.757163] RIP: 0033:0x7f91eb5f0d82 [ 31.757750] 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 [ 31.760460] RSP: 002b:00007ffcd67a0e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.761597] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91eb5f0d82 [ 31.762699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91eaa2a000 [ 31.763777] RBP: 00007f91eaa2a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.764696] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605b84c6ec0 [ 31.765555] R13: 00007ffcd67a0e50 R14: 00007ffcd67a0e80 R15: 00007ffcd67a11e0 [ 31.766449] [ 31.766764] [ 31.766985] Allocated by task 213: [ 31.767415] kasan_save_stack+0x22/0x50 [ 31.767962] kasan_set_track+0x25/0x30 [ 31.768475] __kasan_slab_alloc+0x59/0x70 [ 31.769019] kmem_cache_alloc+0x16b/0x370 [ 31.769550] vm_area_dup+0x20/0x160 [ 31.770018] __split_vma+0x170/0x950 [ 31.770504] split_vma+0xc6/0x110 [ 31.770964] mprotect_fixup+0x8d2/0xb30 [ 31.771478] do_mprotect_pkey+0x87e/0xd40 [ 31.772033] __x64_sys_mprotect+0x78/0xc0 [ 31.772577] do_syscall_64+0x3f/0x90 [ 31.773061] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773744] [ 31.773961] Freed by task 213: [ 31.774359] kasan_save_stack+0x22/0x50 [ 31.774892] kasan_set_track+0x25/0x30 [ 31.775394] kasan_save_free_info+0x2b/0x50 [ 31.775960] __kasan_slab_free+0x10a/0x190 [ 31.776504] kmem_cache_free+0x10d/0x4d0 [ 31.777052] rcu_core+0x8c8/0x2860 [ 31.777530] __do_softirq+0x1b7/0x7d4 [ 31.778048] [ 31.778274] Last potentially related work creation: [ 31.778931] kasan_save_stack+0x22/0x50 [ 31.779464] __kasan_record_aux_stack+0x8e/0xa0 [ 31.780081] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.780800] remove_vma+0x139/0x170 [ 31.781277] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.781877] do_vmi_munmap+0x1f1/0x2b0 [ 31.782398] __vm_munmap+0x138/0x3a0 [ 31.782911] __x64_sys_munmap+0x59/0x80 [ 31.783435] do_syscall_64+0x3f/0x90 [ 31.783952] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.784654] [ 31.784885] The buggy address belongs to the object at ffff88800f0d5740 [ 31.784885] which belongs to the cache vm_area_struct of size 168 [ 31.786485] The buggy address is located 88 bytes inside of [ 31.786485] freed 168-byte region [ffff88800f0d5740, ffff88800f0d57e8) [ 31.788052] [ 31.788280] The buggy address belongs to the physical page: [ 31.788992] page:0000000036c0ef0d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0d5 [ 31.790155] memcg:ffff88800f0b7801 [ 31.790639] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.791377] page_type: 0xffffffff() [ 31.791878] raw: 0100000000000200 ffff88800879fc80 ffffea000066a840 dead000000000003 [ 31.792864] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0b7801 [ 31.793840] page dumped because: kasan: bad access detected [ 31.794564] [ 31.794793] Memory state around the buggy address: [ 31.795409] ffff88800f0d5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.796338] ffff88800f0d5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.797255] >ffff88800f0d5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.798177] ^ [ 31.798735] ffff88800f0d5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.799659] ffff88800f0d5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.800576] ================================================================== [ 31.801826] Disabling lock debugging due to kernel taint [ 34.120782] BUG: Bad rss-counter state mm:000000007a4f7b95 type:MM_FILEPAGES val:33 [ 34.122196] BUG: Bad rss-counter state mm:000000007a4f7b95 type:MM_ANONPAGES val:22 [ 34.592472] BUG: Bad rss-counter state mm:00000000dad0a18e type:MM_FILEPAGES val:33 [ 34.593598] BUG: Bad rss-counter state mm:00000000dad0a18e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43637' (ECDSA) to the list of known hosts. 2023/06/20 07:39:29 fuzzer started 2023/06/20 07:39:30 dialing manager at localhost:44161 2023/06/20 07:39:30 checking machine... 2023/06/20 07:39:30 checking revisions... [ 35.319963] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:39:30 testing simple program... [ 35.370834] cgroup: Unknown subsys name 'net' [ 35.409073] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:39:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8185ae42 RDX=00000000000085ae RSI=00000000000085ae RDI=ffffffff86509278 RBP=ffff888014677ae8 RSP=ffff888014677a20 R8 =0000000000000000 R9 =ffff888014677ad0 R10=0000000000038001 R11=00000000000223e2 R12=ffff888014677af0 R13=ffff888014677ad8 R14=ffff888014677ad1 R15=ffff888014677a90 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fc0c5b7d900 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=00007fbf45d61650 CR3=000000000ca6c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7d30088e7bba5f0e00000000000ae988 XMM05=11a92500b7d6eb9c0000000000135160 XMM06=4fda316b135da52b0000000000133f50 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=0000000000000001 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=00007fff5738e9d8 CR3=000000000e678000 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=2039323a39333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a39333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000