syzkaller login: [ 30.926386] BUG: Bad rss-counter state mm:00000000884ee3d2 type:MM_FILEPAGES val:33 [ 30.927883] BUG: Bad rss-counter state mm:00000000884ee3d2 type:MM_ANONPAGES val:22 [ 31.085020] ================================================================== [ 31.085946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.086908] Read of size 8 at addr ffff88800f5cbd08 by task sshd/219 [ 31.087684] [ 31.088000] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.088940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.089945] Call Trace: [ 31.090283] [ 31.090567] dump_stack_lvl+0x91/0xf0 [ 31.091076] print_report+0xcc/0x620 [ 31.091563] ? __virt_addr_valid+0x102/0x340 [ 31.092123] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.092753] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.093382] kasan_report+0xbe/0xf0 [ 31.093870] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.094500] vma_interval_tree_remove+0xc75/0xec0 [ 31.095144] vma_prepare+0xc54/0x11a0 [ 31.095634] __split_vma+0x5af/0x950 [ 31.096110] ? __pfx___split_vma+0x10/0x10 [ 31.096642] ? find_held_lock+0x2c/0x110 [ 31.097164] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.097739] ? lock_is_held_type+0x9f/0x120 [ 31.098287] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.098905] ? mtree_range_walk+0x632/0x900 [ 31.099472] ? mas_walk+0x5c7/0x7c0 [ 31.099960] do_vmi_munmap+0x1f1/0x2b0 [ 31.100473] mmap_region+0x1f9/0x2660 [ 31.100957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.101478] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.102193] ? __pfx_lock_acquire+0x10/0x10 [ 31.102739] ? __pfx_mmap_region+0x10/0x10 [ 31.103284] ? security_mmap_addr+0x7d/0xa0 [ 31.103817] ? get_unmapped_area+0x1f5/0x3f0 [ 31.104381] do_mmap+0x854/0xf00 [ 31.104851] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.105351] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.105913] ksys_mmap_pgoff+0x3af/0x500 [ 31.106427] do_syscall_64+0x3f/0x90 [ 31.106932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.107591] RIP: 0033:0x7f18e8b9dd82 [ 31.108051] 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 [ 31.110185] RSP: 002b:00007ffc5b53a5b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.111105] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18e8b9dd82 [ 31.111949] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18e7fd7000 [ 31.112801] RBP: 00007f18e7fd7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.113648] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562d1a4acd90 [ 31.114508] R13: 00007ffc5b53a5d0 R14: 00007ffc5b53a600 R15: 00007ffc5b53a960 [ 31.115408] [ 31.115705] [ 31.115924] Allocated by task 212: [ 31.116353] kasan_save_stack+0x22/0x50 [ 31.116860] kasan_set_track+0x25/0x30 [ 31.117361] __kasan_slab_alloc+0x59/0x70 [ 31.117888] kmem_cache_alloc+0x16b/0x370 [ 31.118404] vm_area_dup+0x20/0x160 [ 31.118869] __split_vma+0x170/0x950 [ 31.119349] split_vma+0xc6/0x110 [ 31.119785] mprotect_fixup+0x8d2/0xb30 [ 31.120289] do_mprotect_pkey+0x87e/0xd40 [ 31.120818] __x64_sys_mprotect+0x78/0xc0 [ 31.121337] do_syscall_64+0x3f/0x90 [ 31.121818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.122469] [ 31.122685] Freed by task 212: [ 31.123089] kasan_save_stack+0x22/0x50 [ 31.123600] kasan_set_track+0x25/0x30 [ 31.124097] kasan_save_free_info+0x2b/0x50 [ 31.124632] __kasan_slab_free+0x10a/0x190 [ 31.125168] kmem_cache_free+0x10d/0x4d0 [ 31.125683] rcu_core+0x8c8/0x2860 [ 31.126135] __do_softirq+0x1b7/0x7d4 [ 31.126621] [ 31.126862] Last potentially related work creation: [ 31.127453] kasan_save_stack+0x22/0x50 [ 31.127961] __kasan_record_aux_stack+0x8e/0xa0 [ 31.128538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.129193] remove_vma+0x139/0x170 [ 31.129647] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.130203] do_vmi_munmap+0x1f1/0x2b0 [ 31.130695] __vm_munmap+0x138/0x3a0 [ 31.131167] __x64_sys_munmap+0x59/0x80 [ 31.131664] do_syscall_64+0x3f/0x90 [ 31.132145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.132787] [ 31.133003] The buggy address belongs to the object at ffff88800f5cbcb0 [ 31.133003] which belongs to the cache vm_area_struct of size 168 [ 31.134486] The buggy address is located 88 bytes inside of [ 31.134486] freed 168-byte region [ffff88800f5cbcb0, ffff88800f5cbd58) [ 31.135899] [ 31.136116] The buggy address belongs to the physical page: [ 31.136776] page:000000008f43b209 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5cb [ 31.137865] memcg:ffff88800c732e01 [ 31.138303] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.138967] page_type: 0xffffffff() [ 31.139418] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.140342] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c732e01 [ 31.141259] page dumped because: kasan: bad access detected [ 31.141924] [ 31.142138] Memory state around the buggy address: [ 31.142722] ffff88800f5cbc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.143596] ffff88800f5cbc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.144452] >ffff88800f5cbd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.145309] ^ [ 31.145756] ffff88800f5cbd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.146621] ffff88800f5cbe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.147490] ================================================================== [ 31.148632] Disabling lock debugging due to kernel taint [ 33.406380] BUG: Bad rss-counter state mm:00000000fc3c3c34 type:MM_FILEPAGES val:33 [ 33.407716] BUG: Bad rss-counter state mm:00000000fc3c3c34 type:MM_ANONPAGES val:22 [ 33.979390] BUG: Bad rss-counter state mm:00000000076ac90b type:MM_FILEPAGES val:33 [ 33.980726] BUG: Bad rss-counter state mm:00000000076ac90b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16402' (ECDSA) to the list of known hosts. 2023/06/21 09:17:12 fuzzer started 2023/06/21 09:17:12 dialing manager at localhost:36067 2023/06/21 09:17:12 checking machine... 2023/06/21 09:17:12 checking revisions... [ 34.821370] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:17:12 testing simple program... [ 34.866531] cgroup: Unknown subsys name 'net' [ 34.905099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:17:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880166920e8 RCX=ffffffff8196c002 RDX=ffff88800e433680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff8880162f7950 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=736573203a296e6f R12=0000000000000b79 R13=dffffc0000000000 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c0864 RFL=00000202 [-------] 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 00007f4de250c700 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=00007fd033d0b0b0 CR3=000000000c5d0000 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=2032313a37313a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031313a37313a3930203132 XMM08=69767265733d7373616c63742030733a 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=ffff888008c04400 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=00007fd5681b1e00 CR3=000000000d788000 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=788222cc495e1582ae48653760f9243a XMM02=000000000011aca0eff9b2d0a8fce9cb XMM03=000000000011ad702c67c8bc2e329bc3 XMM04=ab15daf1c974c2af00000000000ae988 XMM05=62ba0c9b7da5aa040000000000132f30 XMM06=806171799158d9670000000000131fd0 XMM07=e042d86d42eb936e0000000000122508 XMM08=a65db85b7896c780000000000011ad70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000