syzkaller login: [ 34.958075] BUG: Bad rss-counter state mm:00000000f2c3fee1 type:MM_FILEPAGES val:33 [ 34.959585] BUG: Bad rss-counter state mm:00000000f2c3fee1 type:MM_ANONPAGES val:22 [ 35.131118] ================================================================== [ 35.132079] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.133059] Read of size 8 at addr ffff88800c5f2140 by task sshd/218 [ 35.133858] [ 35.134188] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.135080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.136103] Call Trace: [ 35.136444] [ 35.136732] dump_stack_lvl+0x91/0xf0 [ 35.137231] print_report+0xcc/0x620 [ 35.137717] ? __virt_addr_valid+0x102/0x340 [ 35.138274] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.138912] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.139550] kasan_report+0xbe/0xf0 [ 35.140031] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.140670] vma_interval_tree_remove+0xc75/0xec0 [ 35.141297] vma_prepare+0xc54/0x11a0 [ 35.141791] __split_vma+0x5af/0x950 [ 35.142270] ? __pfx___split_vma+0x10/0x10 [ 35.142831] ? find_held_lock+0x2c/0x110 [ 35.143371] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.143975] ? lock_is_held_type+0x9f/0x120 [ 35.144541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.145168] ? mtree_range_walk+0x632/0x900 [ 35.145747] ? mas_walk+0x5c7/0x7c0 [ 35.146235] do_vmi_munmap+0x1f1/0x2b0 [ 35.146728] mmap_region+0x1f9/0x2660 [ 35.147223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.147765] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.148493] ? __pfx_lock_acquire+0x10/0x10 [ 35.149043] ? __pfx_mmap_region+0x10/0x10 [ 35.149576] ? security_mmap_addr+0x7d/0xa0 [ 35.150119] ? get_unmapped_area+0x1f5/0x3f0 [ 35.150683] do_mmap+0x854/0xf00 [ 35.151150] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.151680] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.152267] ksys_mmap_pgoff+0x3af/0x500 [ 35.152800] do_syscall_64+0x3f/0x90 [ 35.153312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.153969] RIP: 0033:0x7f372b4e9d82 [ 35.154431] 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 [ 35.156579] RSP: 002b:00007ffe09bd5f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.157496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f372b4e9d82 [ 35.158364] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f372a923000 [ 35.159230] RBP: 00007f372a923000 R08: 0000000000000009 R09: 0000000000001000 [ 35.160150] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b2508fef70 [ 35.161034] R13: 00007ffe09bd5f70 R14: 00007ffe09bd5fa0 R15: 00007ffe09bd6300 [ 35.161935] [ 35.162236] [ 35.162460] Allocated by task 211: [ 35.162897] kasan_save_stack+0x22/0x50 [ 35.163414] kasan_set_track+0x25/0x30 [ 35.163912] __kasan_slab_alloc+0x59/0x70 [ 35.164449] kmem_cache_alloc+0x16b/0x370 [ 35.164974] vm_area_dup+0x20/0x160 [ 35.165437] __split_vma+0x170/0x950 [ 35.165906] split_vma+0xc6/0x110 [ 35.166353] mprotect_fixup+0x8d2/0xb30 [ 35.166866] do_mprotect_pkey+0x87e/0xd40 [ 35.167390] __x64_sys_mprotect+0x78/0xc0 [ 35.167937] do_syscall_64+0x3f/0x90 [ 35.168418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.169062] [ 35.169285] Freed by task 202: [ 35.169694] kasan_save_stack+0x22/0x50 [ 35.170211] kasan_set_track+0x25/0x30 [ 35.170710] kasan_save_free_info+0x2b/0x50 [ 35.171252] __kasan_slab_free+0x10a/0x190 [ 35.171817] kmem_cache_free+0x10d/0x4d0 [ 35.172337] rcu_core+0x8c8/0x2860 [ 35.172798] __do_softirq+0x1b7/0x7d4 [ 35.173279] [ 35.173496] Last potentially related work creation: [ 35.174087] kasan_save_stack+0x22/0x50 [ 35.174603] __kasan_record_aux_stack+0x8e/0xa0 [ 35.175175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.175832] remove_vma+0x139/0x170 [ 35.176291] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.176856] do_vmi_munmap+0x1f1/0x2b0 [ 35.177360] __vm_munmap+0x138/0x3a0 [ 35.177832] __x64_sys_munmap+0x59/0x80 [ 35.178333] do_syscall_64+0x3f/0x90 [ 35.178802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.179452] [ 35.179674] The buggy address belongs to the object at ffff88800c5f20e8 [ 35.179674] which belongs to the cache vm_area_struct of size 168 [ 35.181160] The buggy address is located 88 bytes inside of [ 35.181160] freed 168-byte region [ffff88800c5f20e8, ffff88800c5f2190) [ 35.182601] [ 35.182822] The buggy address belongs to the physical page: [ 35.183493] page:00000000da4bf16d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5f2 [ 35.184629] memcg:ffff88800dc87301 [ 35.185057] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.185758] page_type: 0xffffffff() [ 35.186230] raw: 0100000000000200 ffff8880087a0c80 ffffea0000317cc0 dead000000000005 [ 35.187168] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dc87301 [ 35.188117] page dumped because: kasan: bad access detected [ 35.188796] [ 35.189011] Memory state around the buggy address: [ 35.189600] ffff88800c5f2000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.190464] ffff88800c5f2080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.191312] >ffff88800c5f2100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.192178] ^ [ 35.192823] ffff88800c5f2180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.193680] ffff88800c5f2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.194531] ================================================================== [ 35.195497] Disabling lock debugging due to kernel taint [ 37.822172] BUG: Bad rss-counter state mm:00000000bf3528a4 type:MM_FILEPAGES val:33 [ 37.823161] BUG: Bad rss-counter state mm:00000000bf3528a4 type:MM_ANONPAGES val:22 [ 38.261592] BUG: Bad rss-counter state mm:00000000e069ff41 type:MM_FILEPAGES val:33 [ 38.262398] BUG: Bad rss-counter state mm:00000000e069ff41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49206' (ECDSA) to the list of known hosts. 2023/06/21 10:35:59 fuzzer started 2023/06/21 10:35:59 dialing manager at localhost:36067 2023/06/21 10:35:59 checking machine... 2023/06/21 10:35:59 checking revisions... [ 38.990369] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:36:00 testing simple program... [ 39.039310] cgroup: Unknown subsys name 'net' [ 39.080792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:35:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007efc6ef26380 CR3=000000000ef24000 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=2039353a35333a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a35333a3031203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016898000 RBX=ffff888016199b40 RCX=ffff8880168a0000 RDX=ffff88801689f290 RSI=ffff888016199b40 RDI=ffff88801689f240 RBP=ffff88801689f290 RSP=ffff88801689f1f8 R8 =0000000000000001 R9 =0000000000000000 R10=ffff88801689f290 R11=00000000000b6a61 R12=ffff88801689f240 R13=ffff88801689f2b8 R14=ffff88801689f2d8 R15=ffff88801689f290 RIP=ffffffff8450e19d RFL=00000206 [-----P-] 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 00007fd6542ac900 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=00007ffc7deef000 CR3=000000000c60e000 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