syzkaller login: [ 50.053619] BUG: Bad rss-counter state mm:0000000064cbed31 type:MM_FILEPAGES val:33 [ 50.054932] BUG: Bad rss-counter state mm:0000000064cbed31 type:MM_ANONPAGES val:22 [ 50.201988] ================================================================== [ 50.203043] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.204048] Read of size 8 at addr ffff88800e4ac798 by task sshd/218 [ 50.205014] [ 50.205251] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.206193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.207255] Call Trace: [ 50.207601] [ 50.207908] dump_stack_lvl+0x91/0xf0 [ 50.208432] print_report+0xcc/0x620 [ 50.208963] ? __virt_addr_valid+0x102/0x340 [ 50.209557] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.210249] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.210922] kasan_report+0xbe/0xf0 [ 50.211436] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.212127] vma_interval_tree_remove+0xc75/0xec0 [ 50.212785] vma_prepare+0xc54/0x11a0 [ 50.213314] __split_vma+0x5af/0x950 [ 50.213840] ? __pfx___split_vma+0x10/0x10 [ 50.214439] ? find_held_lock+0x2c/0x110 [ 50.215024] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.215651] ? lock_is_held_type+0x9f/0x120 [ 50.216248] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.216918] ? mtree_range_walk+0x632/0x900 [ 50.217522] ? mas_walk+0x5c7/0x7c0 [ 50.218061] do_vmi_munmap+0x1f1/0x2b0 [ 50.218609] mmap_region+0x1f9/0x2660 [ 50.219138] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.219699] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.220482] ? __pfx_lock_acquire+0x10/0x10 [ 50.221053] ? __pfx_mmap_region+0x10/0x10 [ 50.221634] ? security_mmap_addr+0x7d/0xa0 [ 50.222231] ? get_unmapped_area+0x1f5/0x3f0 [ 50.222826] do_mmap+0x854/0xf00 [ 50.223295] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.223828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.224428] ksys_mmap_pgoff+0x3af/0x500 [ 50.224971] do_syscall_64+0x3f/0x90 [ 50.225488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.226199] RIP: 0033:0x7fd808ee2d82 [ 50.226690] 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 [ 50.229022] RSP: 002b:00007ffe64ed9c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.230008] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd808ee2d82 [ 50.230909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd80831c000 [ 50.231810] RBP: 00007fd80831c000 R08: 0000000000000009 R09: 0000000000001000 [ 50.232709] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e2176ab20 [ 50.233611] R13: 00007ffe64ed9c30 R14: 00007ffe64ed9c60 R15: 00007ffe64ed9fc0 [ 50.234537] [ 50.234851] [ 50.235083] Allocated by task 211: [ 50.235540] kasan_save_stack+0x22/0x50 [ 50.236078] kasan_set_track+0x25/0x30 [ 50.236612] __kasan_slab_alloc+0x59/0x70 [ 50.237169] kmem_cache_alloc+0x16b/0x370 [ 50.237721] vm_area_dup+0x20/0x160 [ 50.238218] __split_vma+0x170/0x950 [ 50.238718] split_vma+0xc6/0x110 [ 50.239185] mprotect_fixup+0x8d2/0xb30 [ 50.239724] do_mprotect_pkey+0x87e/0xd40 [ 50.240286] __x64_sys_mprotect+0x78/0xc0 [ 50.240846] do_syscall_64+0x3f/0x90 [ 50.241352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.242060] [ 50.242292] Freed by task 13: [ 50.242711] kasan_save_stack+0x22/0x50 [ 50.243249] kasan_set_track+0x25/0x30 [ 50.243784] kasan_save_free_info+0x2b/0x50 [ 50.244355] __kasan_slab_free+0x10a/0x190 [ 50.244924] kmem_cache_free+0x10d/0x4d0 [ 50.245469] rcu_core+0x8c8/0x2860 [ 50.245962] __do_softirq+0x1b7/0x7d4 [ 50.246471] [ 50.246706] Last potentially related work creation: [ 50.247328] kasan_save_stack+0x22/0x50 [ 50.247875] __kasan_record_aux_stack+0x8e/0xa0 [ 50.248490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.249173] remove_vma+0x139/0x170 [ 50.249658] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.250273] do_vmi_munmap+0x1f1/0x2b0 [ 50.250805] __vm_munmap+0x138/0x3a0 [ 50.251306] __x64_sys_munmap+0x59/0x80 [ 50.251837] do_syscall_64+0x3f/0x90 [ 50.252349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.253031] [ 50.253265] Second to last potentially related work creation: [ 50.254007] kasan_save_stack+0x22/0x50 [ 50.254545] __kasan_record_aux_stack+0x8e/0xa0 [ 50.255153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.255842] remove_vma+0x139/0x170 [ 50.256323] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.256918] do_vmi_munmap+0x1f1/0x2b0 [ 50.257433] mmap_region+0x1f9/0x2660 [ 50.257951] do_mmap+0x854/0xf00 [ 50.258420] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.258947] ksys_mmap_pgoff+0x3af/0x500 [ 50.259483] do_syscall_64+0x3f/0x90 [ 50.259995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.260684] [ 50.260919] The buggy address belongs to the object at ffff88800e4ac740 [ 50.260919] which belongs to the cache vm_area_struct of size 168 [ 50.262510] The buggy address is located 88 bytes inside of [ 50.262510] freed 168-byte region [ffff88800e4ac740, ffff88800e4ac7e8) [ 50.264012] [ 50.264242] The buggy address belongs to the physical page: [ 50.264952] page:0000000069e2d620 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4ac [ 50.266130] memcg:ffff88800dd49701 [ 50.266589] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.267282] page_type: 0xffffffff() [ 50.267771] raw: 0100000000000200 ffff88800879fc80 ffffea0000268380 dead000000000008 [ 50.268765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd49701 [ 50.269755] page dumped because: kasan: bad access detected [ 50.270505] [ 50.270743] Memory state around the buggy address: [ 50.271393] ffff88800e4ac680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.272350] ffff88800e4ac700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 50.273303] >ffff88800e4ac780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 50.274269] ^ [ 50.274821] ffff88800e4ac800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 50.275785] ffff88800e4ac880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 50.276743] ================================================================== [ 50.278174] Disabling lock debugging due to kernel taint [ 53.103853] BUG: Bad rss-counter state mm:000000008696a3f8 type:MM_FILEPAGES val:33 [ 53.104863] BUG: Bad rss-counter state mm:000000008696a3f8 type:MM_ANONPAGES val:22 [ 53.581162] BUG: Bad rss-counter state mm:00000000958328e4 type:MM_FILEPAGES val:33 [ 53.582674] BUG: Bad rss-counter state mm:00000000958328e4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3224' (ECDSA) to the list of known hosts. 2023/06/19 17:51:14 fuzzer started 2023/06/19 17:51:14 dialing manager at localhost:44161 2023/06/19 17:51:14 checking machine... 2023/06/19 17:51:14 checking revisions... [ 54.319263] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:51:14 testing simple program... [ 54.374966] cgroup: Unknown subsys name 'net' [ 54.435768] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:50:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f9b3e0757b0 CR3=000000000c670000 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=2033313a31353a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31353a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864a98e5 RBX=0000000000000001 RCX=ffffffff864a98e0 RDX=dffffc0000000000 RSI=ffffffff864a98e0 RDI=ffffffff86048c8c RBP=ffff88800fe5f148 RSP=ffff88800fe5f080 R8 =ffffffff864a98e0 R9 =ffff88800fe5f130 R10=0000000000038001 R11=00000000000b3e2e R12=ffff88800fe5f150 R13=ffff88800fe5f138 R14=ffff88800fe5f131 R15=ffff88800fe5f0f0 RIP=ffffffff81130a50 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 00007f1230c02900 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=00007f1230bbb008 CR3=000000000f012000 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