syzkaller login: [ 30.048954] BUG: Bad rss-counter state mm:00000000b17c0f50 type:MM_FILEPAGES val:33 [ 30.050686] BUG: Bad rss-counter state mm:00000000b17c0f50 type:MM_ANONPAGES val:22 [ 30.214574] ================================================================== [ 30.215480] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.216429] Read of size 8 at addr ffff88801a290c20 by task sshd/221 [ 30.217310] [ 30.217531] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.218413] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.219404] Call Trace: [ 30.219725] [ 30.220017] dump_stack_lvl+0x91/0xf0 [ 30.220512] print_report+0xcc/0x620 [ 30.220999] ? __virt_addr_valid+0x102/0x340 [ 30.221555] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222199] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.222820] kasan_report+0xbe/0xf0 [ 30.223302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.223933] vma_interval_tree_remove+0xc75/0xec0 [ 30.224535] vma_prepare+0xc54/0x11a0 [ 30.225008] __split_vma+0x5af/0x950 [ 30.225475] ? __pfx___split_vma+0x10/0x10 [ 30.225996] ? find_held_lock+0x2c/0x110 [ 30.226532] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.227089] ? lock_is_held_type+0x9f/0x120 [ 30.227632] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.228232] ? mtree_range_walk+0x632/0x900 [ 30.228775] ? mas_walk+0x5c7/0x7c0 [ 30.229247] do_vmi_munmap+0x1f1/0x2b0 [ 30.229732] mmap_region+0x1f9/0x2660 [ 30.230226] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.230739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.231452] ? __pfx_lock_acquire+0x10/0x10 [ 30.231988] ? __pfx_mmap_region+0x10/0x10 [ 30.232515] ? security_mmap_addr+0x7d/0xa0 [ 30.233038] ? get_unmapped_area+0x1f5/0x3f0 [ 30.233578] do_mmap+0x854/0xf00 [ 30.234018] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.234526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.235090] ksys_mmap_pgoff+0x3af/0x500 [ 30.235597] do_syscall_64+0x3f/0x90 [ 30.236070] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.236711] RIP: 0033:0x7f6349461d82 [ 30.237162] 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 [ 30.239267] RSP: 002b:00007ffc141ef218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.240191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6349461d82 [ 30.241040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f634889b000 [ 30.241884] RBP: 00007f634889b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.242742] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627e0a59ec0 [ 30.243594] R13: 00007ffc141ef230 R14: 00007ffc141ef260 R15: 00007ffc141ef5c0 [ 30.244437] [ 30.244725] [ 30.244943] Allocated by task 214: [ 30.245368] kasan_save_stack+0x22/0x50 [ 30.245877] kasan_set_track+0x25/0x30 [ 30.246379] __kasan_slab_alloc+0x59/0x70 [ 30.246895] kmem_cache_alloc+0x16b/0x370 [ 30.247407] vm_area_dup+0x20/0x160 [ 30.247869] __split_vma+0x170/0x950 [ 30.248339] split_vma+0xc6/0x110 [ 30.248780] mprotect_fixup+0x8d2/0xb30 [ 30.249277] do_mprotect_pkey+0x87e/0xd40 [ 30.249788] __x64_sys_mprotect+0x78/0xc0 [ 30.250322] do_syscall_64+0x3f/0x90 [ 30.250795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.251433] [ 30.251644] Freed by task 13: [ 30.252023] kasan_save_stack+0x22/0x50 [ 30.252526] kasan_set_track+0x25/0x30 [ 30.253014] kasan_save_free_info+0x2b/0x50 [ 30.253543] __kasan_slab_free+0x10a/0x190 [ 30.254071] kmem_cache_free+0x10d/0x4d0 [ 30.254590] rcu_core+0x8c8/0x2860 [ 30.255031] __do_softirq+0x1b7/0x7d4 [ 30.255513] [ 30.255725] Last potentially related work creation: [ 30.256303] kasan_save_stack+0x22/0x50 [ 30.256809] __kasan_record_aux_stack+0x8e/0xa0 [ 30.257386] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.258026] remove_vma+0x139/0x170 [ 30.258489] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.259038] do_vmi_munmap+0x1f1/0x2b0 [ 30.259516] __vm_munmap+0x138/0x3a0 [ 30.259978] __x64_sys_munmap+0x59/0x80 [ 30.260480] do_syscall_64+0x3f/0x90 [ 30.260963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.261601] [ 30.261814] The buggy address belongs to the object at ffff88801a290bc8 [ 30.261814] which belongs to the cache vm_area_struct of size 168 [ 30.263280] The buggy address is located 88 bytes inside of [ 30.263280] freed 168-byte region [ffff88801a290bc8, ffff88801a290c70) [ 30.264669] [ 30.264883] The buggy address belongs to the physical page: [ 30.265534] page:000000008a77300b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a290 [ 30.266624] memcg:ffff88800e5ffa01 [ 30.267056] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.267693] page_type: 0xffffffff() [ 30.268138] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.269042] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5ffa01 [ 30.269948] page dumped because: kasan: bad access detected [ 30.270615] [ 30.270828] Memory state around the buggy address: [ 30.271405] ffff88801a290b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.272243] ffff88801a290b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.273094] >ffff88801a290c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.273937] ^ [ 30.274480] ffff88801a290c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.275332] ffff88801a290d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.276173] ================================================================== [ 30.277337] Disabling lock debugging due to kernel taint [ 32.581199] BUG: Bad rss-counter state mm:00000000c6218ac5 type:MM_FILEPAGES val:33 [ 32.582361] BUG: Bad rss-counter state mm:00000000c6218ac5 type:MM_ANONPAGES val:22 [ 32.944585] BUG: Bad rss-counter state mm:00000000d7c6e7ca type:MM_FILEPAGES val:33 [ 32.945556] BUG: Bad rss-counter state mm:00000000d7c6e7ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40333' (ECDSA) to the list of known hosts. 2023/06/20 21:36:48 fuzzer started 2023/06/20 21:36:49 dialing manager at localhost:36067 2023/06/20 21:36:49 checking machine... 2023/06/20 21:36:49 checking revisions... [ 33.652630] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:36:49 testing simple program... [ 33.714571] cgroup: Unknown subsys name 'net' [ 33.756371] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:36:48 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=00007f31c210b810 CR3=0000000009666000 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=2038343a36333a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36333a3132203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff110018e4b13 RSI=ffffffff8184725c RDI=ffff88800844f780 RBP=0000000000000100 RSP=ffff888019caf380 R8 =ffff888019caf330 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888009a1c800 R13=0000000000000000 R14=ffff88800c725898 R15=ffff88800c725850 RIP=ffffffff81847281 RFL=00000246 [---Z-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 00007f7940c58900 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=00007f7940c37020 CR3=0000000019f88000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000