syzkaller login: [ 31.996334] BUG: Bad rss-counter state mm:00000000b199dbfe type:MM_FILEPAGES val:33 [ 31.997863] BUG: Bad rss-counter state mm:00000000b199dbfe type:MM_ANONPAGES val:22 [ 32.159934] ================================================================== [ 32.160906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.161887] Read of size 8 at addr ffff888016b60df0 by task sshd/220 [ 32.162794] [ 32.163049] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.163961] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.164985] Call Trace: [ 32.165326] [ 32.165627] dump_stack_lvl+0x91/0xf0 [ 32.166141] print_report+0xcc/0x620 [ 32.166656] ? __virt_addr_valid+0x102/0x340 [ 32.167245] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.167884] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.168531] kasan_report+0xbe/0xf0 [ 32.169029] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.169684] vma_interval_tree_remove+0xc75/0xec0 [ 32.170314] vma_prepare+0xc54/0x11a0 [ 32.170817] __split_vma+0x5af/0x950 [ 32.171342] ? __pfx___split_vma+0x10/0x10 [ 32.171902] ? find_held_lock+0x2c/0x110 [ 32.172439] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.173037] ? lock_is_held_type+0x9f/0x120 [ 32.173599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.174243] ? mtree_range_walk+0x632/0x900 [ 32.174828] ? mas_walk+0x5c7/0x7c0 [ 32.175334] do_vmi_munmap+0x1f1/0x2b0 [ 32.175854] mmap_region+0x1f9/0x2660 [ 32.176360] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.176897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.177638] ? __pfx_lock_acquire+0x10/0x10 [ 32.178204] ? __pfx_mmap_region+0x10/0x10 [ 32.178768] ? security_mmap_addr+0x7d/0xa0 [ 32.179335] ? get_unmapped_area+0x1f5/0x3f0 [ 32.179920] do_mmap+0x854/0xf00 [ 32.180389] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.180911] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.181504] ksys_mmap_pgoff+0x3af/0x500 [ 32.182040] do_syscall_64+0x3f/0x90 [ 32.182543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.183255] RIP: 0033:0x7f8330eabd82 [ 32.183735] 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 [ 32.185972] RSP: 002b:00007ffe80bd8598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.186941] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8330eabd82 [ 32.187846] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f83302e5000 [ 32.188758] RBP: 00007f83302e5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.189670] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f330aaf60 [ 32.190570] R13: 00007ffe80bd85b0 R14: 00007ffe80bd85e0 R15: 00007ffe80bd8940 [ 32.191506] [ 32.191827] [ 32.192055] Allocated by task 213: [ 32.192507] kasan_save_stack+0x22/0x50 [ 32.193039] kasan_set_track+0x25/0x30 [ 32.193555] __kasan_slab_alloc+0x59/0x70 [ 32.194115] kmem_cache_alloc+0x16b/0x370 [ 32.194662] vm_area_dup+0x20/0x160 [ 32.195176] __split_vma+0x170/0x950 [ 32.195668] split_vma+0xc6/0x110 [ 32.196140] mprotect_fixup+0x8d2/0xb30 [ 32.196678] do_mprotect_pkey+0x87e/0xd40 [ 32.197233] __x64_sys_mprotect+0x78/0xc0 [ 32.197781] do_syscall_64+0x3f/0x90 [ 32.198280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.198954] [ 32.199191] Freed by task 13: [ 32.199596] kasan_save_stack+0x22/0x50 [ 32.200132] kasan_set_track+0x25/0x30 [ 32.200671] kasan_save_free_info+0x2b/0x50 [ 32.201234] __kasan_slab_free+0x10a/0x190 [ 32.201804] kmem_cache_free+0x10d/0x4d0 [ 32.202348] rcu_core+0x8c8/0x2860 [ 32.202818] __do_softirq+0x1b7/0x7d4 [ 32.203354] [ 32.203584] Last potentially related work creation: [ 32.204246] kasan_save_stack+0x22/0x50 [ 32.204779] __kasan_record_aux_stack+0x8e/0xa0 [ 32.205377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.206063] remove_vma+0x139/0x170 [ 32.206549] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.207175] do_vmi_munmap+0x1f1/0x2b0 [ 32.207708] __vm_munmap+0x138/0x3a0 [ 32.208206] __x64_sys_munmap+0x59/0x80 [ 32.208735] do_syscall_64+0x3f/0x90 [ 32.209242] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.209917] [ 32.210143] The buggy address belongs to the object at ffff888016b60d98 [ 32.210143] which belongs to the cache vm_area_struct of size 168 [ 32.211724] The buggy address is located 88 bytes inside of [ 32.211724] freed 168-byte region [ffff888016b60d98, ffff888016b60e40) [ 32.213208] [ 32.213442] The buggy address belongs to the physical page: [ 32.214132] page:0000000010b918a9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b60 [ 32.215300] memcg:ffff888019f1b401 [ 32.215746] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.216433] page_type: 0xffffffff() [ 32.216905] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.217865] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f1b401 [ 32.218818] page dumped because: kasan: bad access detected [ 32.219520] [ 32.219753] Memory state around the buggy address: [ 32.220360] ffff888016b60c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 32.221256] ffff888016b60d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 32.222152] >ffff888016b60d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.223109] ^ [ 32.224079] ffff888016b60e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.225130] ffff888016b60e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.226167] ================================================================== [ 32.227294] Disabling lock debugging due to kernel taint [ 34.456764] BUG: Bad rss-counter state mm:00000000cde11fb9 type:MM_FILEPAGES val:33 [ 34.458245] BUG: Bad rss-counter state mm:00000000cde11fb9 type:MM_ANONPAGES val:22 [ 35.011110] BUG: Bad rss-counter state mm:000000009a1c8284 type:MM_FILEPAGES val:33 [ 35.012275] BUG: Bad rss-counter state mm:000000009a1c8284 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23008' (ECDSA) to the list of known hosts. 2023/06/19 12:59:00 fuzzer started 2023/06/19 12:59:00 dialing manager at localhost:44161 2023/06/19 12:59:00 checking machine... 2023/06/19 12:59:00 checking revisions... [ 35.623636] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:59:00 testing simple program... [ 35.675229] cgroup: Unknown subsys name 'net' [ 35.721817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:58:58 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85fa39a8 RCX=ffffffff8363dd1b RDX=0000000000000001 RSI=ffffffff863b1c7e RDI=ffffffff85fa39a0 RBP=ffffffff85fa39a0 RSP=ffff88806ce099e0 R8 =ffffffff863b1c7e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008a973 R12=ffffffff85fa39a4 R13=ffffffff85fa39a0 R14=ffffffff85fa39a0 R15=dffffc0000000000 RIP=ffffffff8112fc68 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 00007f4b469a9900 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=00007f4b46f610b0 CR3=000000000c49e000 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=2039353a38353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a38353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007f585c724a20 CR3=0000000008ee2000 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=006a45f2c6debdbaac474d722f56ddc1 XMM02=000000000011d600eff9b2d0a8fce9cb XMM03=000000000011d6d02c67c8bc2e329bc3 XMM04=6d1d741b112c3d0000000000000ae988 XMM05=19e9129bd510f2350000000000133fc0 XMM06=de85cae2310fc2140000000000132e28 XMM07=e042d86d42eb936e0000000000124698 XMM08=09c8e6ac3e9d53b7000000000011d6d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000