syzkaller login: [ 31.027715] BUG: Bad rss-counter state mm:0000000068cd0cbb type:MM_FILEPAGES val:33 [ 31.028783] BUG: Bad rss-counter state mm:0000000068cd0cbb type:MM_ANONPAGES val:22 [ 31.212780] ================================================================== [ 31.214117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.215374] Read of size 8 at addr ffff88801a0db880 by task sshd/221 [ 31.216398] [ 31.216691] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.217846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.219152] Call Trace: [ 31.219575] [ 31.219958] dump_stack_lvl+0x91/0xf0 [ 31.220609] print_report+0xcc/0x620 [ 31.221258] ? __virt_addr_valid+0x102/0x340 [ 31.222010] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.222831] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.223699] kasan_report+0xbe/0xf0 [ 31.224363] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.225242] vma_interval_tree_remove+0xc75/0xec0 [ 31.226058] vma_prepare+0xc54/0x11a0 [ 31.226561] __split_vma+0x5af/0x950 [ 31.227066] ? __pfx___split_vma+0x10/0x10 [ 31.227622] ? find_held_lock+0x2c/0x110 [ 31.228178] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.228773] ? lock_is_held_type+0x9f/0x120 [ 31.229344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.229999] ? mtree_range_walk+0x632/0x900 [ 31.230574] ? mas_walk+0x5c7/0x7c0 [ 31.231070] do_vmi_munmap+0x1f1/0x2b0 [ 31.231588] mmap_region+0x1f9/0x2660 [ 31.232094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.232621] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.233376] ? __pfx_lock_acquire+0x10/0x10 [ 31.233940] ? __pfx_mmap_region+0x10/0x10 [ 31.234492] ? security_mmap_addr+0x7d/0xa0 [ 31.235052] ? get_unmapped_area+0x1f5/0x3f0 [ 31.235625] do_mmap+0x854/0xf00 [ 31.236087] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.236600] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.237187] ksys_mmap_pgoff+0x3af/0x500 [ 31.237721] do_syscall_64+0x3f/0x90 [ 31.238241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.238915] RIP: 0033:0x7fc9185b1d82 [ 31.239390] 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 [ 31.241625] RSP: 002b:00007ffef43484e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.242585] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc9185b1d82 [ 31.243465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc9179eb000 [ 31.244360] RBP: 00007fc9179eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.245256] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d1c1f0ec0 [ 31.246157] R13: 00007ffef4348500 R14: 00007ffef4348530 R15: 00007ffef4348890 [ 31.247049] [ 31.247360] [ 31.247583] Allocated by task 214: [ 31.248030] kasan_save_stack+0x22/0x50 [ 31.248556] kasan_set_track+0x25/0x30 [ 31.249076] __kasan_slab_alloc+0x59/0x70 [ 31.249629] kmem_cache_alloc+0x16b/0x370 [ 31.250194] vm_area_dup+0x20/0x160 [ 31.250677] __split_vma+0x170/0x950 [ 31.251169] split_vma+0xc6/0x110 [ 31.251624] mprotect_fixup+0x8d2/0xb30 [ 31.252148] do_mprotect_pkey+0x87e/0xd40 [ 31.252696] __x64_sys_mprotect+0x78/0xc0 [ 31.253239] do_syscall_64+0x3f/0x90 [ 31.253738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.254418] [ 31.254639] Freed by task 214: [ 31.255063] kasan_save_stack+0x22/0x50 [ 31.255586] kasan_set_track+0x25/0x30 [ 31.256107] kasan_save_free_info+0x2b/0x50 [ 31.256664] __kasan_slab_free+0x10a/0x190 [ 31.257221] kmem_cache_free+0x10d/0x4d0 [ 31.257770] rcu_core+0x8c8/0x2860 [ 31.258237] __do_softirq+0x1b7/0x7d4 [ 31.258744] [ 31.258970] Last potentially related work creation: [ 31.259578] kasan_save_stack+0x22/0x50 [ 31.260106] __kasan_record_aux_stack+0x8e/0xa0 [ 31.260704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.261384] remove_vma+0x139/0x170 [ 31.261985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.262715] do_vmi_munmap+0x1f1/0x2b0 [ 31.263342] __vm_munmap+0x138/0x3a0 [ 31.263929] __x64_sys_munmap+0x59/0x80 [ 31.264528] do_syscall_64+0x3f/0x90 [ 31.265107] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265922] [ 31.266187] The buggy address belongs to the object at ffff88801a0db828 [ 31.266187] which belongs to the cache vm_area_struct of size 168 [ 31.267967] The buggy address is located 88 bytes inside of [ 31.267967] freed 168-byte region [ffff88801a0db828, ffff88801a0db8d0) [ 31.269665] [ 31.269944] The buggy address belongs to the physical page: [ 31.270748] page:00000000b416d75e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0db [ 31.272074] memcg:ffff88800e04b401 [ 31.272590] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.273372] page_type: 0xffffffff() [ 31.273923] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.275039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e04b401 [ 31.276138] page dumped because: kasan: bad access detected [ 31.276940] [ 31.277200] Memory state around the buggy address: [ 31.277930] ffff88801a0db780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.278801] ffff88801a0db800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.279647] >ffff88801a0db880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.280498] ^ [ 31.280912] ffff88801a0db900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.281765] ffff88801a0db980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.282623] ================================================================== [ 31.283809] Disabling lock debugging due to kernel taint [ 33.019179] BUG: Bad rss-counter state mm:00000000bf49209b type:MM_FILEPAGES val:33 [ 33.020363] BUG: Bad rss-counter state mm:00000000bf49209b type:MM_ANONPAGES val:22 [ 33.362283] BUG: Bad rss-counter state mm:00000000fe915f22 type:MM_FILEPAGES val:33 [ 33.363042] BUG: Bad rss-counter state mm:00000000fe915f22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45466' (ECDSA) to the list of known hosts. 2023/06/21 00:37:44 fuzzer started 2023/06/21 00:37:44 dialing manager at localhost:36067 2023/06/21 00:37:44 checking machine... 2023/06/21 00:37:44 checking revisions... [ 34.054248] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:37:44 testing simple program... [ 34.088733] cgroup: Unknown subsys name 'net' [ 34.127590] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:37:43 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=ffffffff813ad470 RCX=ffff888016cdf918 RDX=1ffff11002d9bf1a RSI=ffffffff813ad720 RDI=ffff888016cdf940 RBP=ffff888016cdf910 RSP=ffff888016cdf870 R8 =0000000000000001 R9 =ffff888016cdf8b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888016cdf940 R13=0000000000000000 R14=ffff88800f4c9b40 R15=0000000000092cc0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 00007fe1d4db7900 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=00007fe1d536e618 CR3=000000000ec72000 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=2033343a37333a3030203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37333a3030203132 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f7a6b5dacf0 CR3=000000000cb78000 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=9623980610b9a885064b44c393907c77 XMM02=2c67c8bc2e329bc30000000000119960 XMM03=fb795ef6d65770560000000000120ec0 XMM04=b4c22c1e990530c900000000000ae988 XMM05=e4cb8bb95a7664b60000000000130f48 XMM06=57ee8c2555228037000000000012f648 XMM07=e042d86d42eb936e0000000000121140 XMM08=57b9f040d985003e00000000001199c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000