syzkaller login: [ 30.275326] BUG: Bad rss-counter state mm:000000004ee3f56e type:MM_FILEPAGES val:33 [ 30.275834] BUG: Bad rss-counter state mm:000000004ee3f56e type:MM_ANONPAGES val:22 [ 30.440407] ================================================================== [ 30.441547] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.442864] Read of size 8 at addr ffff888015a8ad08 by task sshd/220 [ 30.443803] [ 30.444060] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.445062] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.446195] Call Trace: [ 30.446566] [ 30.446895] dump_stack_lvl+0x91/0xf0 [ 30.447494] print_report+0xcc/0x620 [ 30.448058] ? __virt_addr_valid+0x102/0x340 [ 30.448694] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.449412] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.450126] kasan_report+0xbe/0xf0 [ 30.450697] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.451478] vma_interval_tree_remove+0xc75/0xec0 [ 30.452218] vma_prepare+0xc54/0x11a0 [ 30.452832] __split_vma+0x5af/0x950 [ 30.453418] ? __pfx___split_vma+0x10/0x10 [ 30.454092] ? find_held_lock+0x2c/0x110 [ 30.454747] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.455462] ? lock_is_held_type+0x9f/0x120 [ 30.456159] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.456958] ? mtree_range_walk+0x632/0x900 [ 30.457679] ? mas_walk+0x5c7/0x7c0 [ 30.458278] do_vmi_munmap+0x1f1/0x2b0 [ 30.458902] mmap_region+0x1f9/0x2660 [ 30.459551] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.460204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.461098] ? __pfx_lock_acquire+0x10/0x10 [ 30.461757] ? __pfx_mmap_region+0x10/0x10 [ 30.462424] ? security_mmap_addr+0x7d/0xa0 [ 30.463088] ? get_unmapped_area+0x1f5/0x3f0 [ 30.463792] do_mmap+0x854/0xf00 [ 30.464329] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.464946] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.465642] ksys_mmap_pgoff+0x3af/0x500 [ 30.466272] do_syscall_64+0x3f/0x90 [ 30.466874] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.467684] RIP: 0033:0x7f5f5da36d82 [ 30.468256] 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 [ 30.470944] RSP: 002b:00007ffdc1681a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.472075] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f5da36d82 [ 30.473131] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f5ce70000 [ 30.474195] RBP: 00007f5f5ce70000 R08: 0000000000000009 R09: 0000000000001000 [ 30.475244] R10: 0000000000000812 R11: 0000000000000206 R12: 00005589ca78dec0 [ 30.476236] R13: 00007ffdc1681a40 R14: 00007ffdc1681a70 R15: 00007ffdc1681dd0 [ 30.477224] [ 30.477564] [ 30.477811] Allocated by task 213: [ 30.478303] kasan_save_stack+0x22/0x50 [ 30.478887] kasan_set_track+0x25/0x30 [ 30.479476] __kasan_slab_alloc+0x59/0x70 [ 30.480079] kmem_cache_alloc+0x16b/0x370 [ 30.480671] vm_area_dup+0x20/0x160 [ 30.481212] __split_vma+0x170/0x950 [ 30.481746] split_vma+0xc6/0x110 [ 30.482251] mprotect_fixup+0x8d2/0xb30 [ 30.482832] do_mprotect_pkey+0x87e/0xd40 [ 30.483513] __x64_sys_mprotect+0x78/0xc0 [ 30.484128] do_syscall_64+0x3f/0x90 [ 30.484685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485462] [ 30.485716] Freed by task 19: [ 30.486168] kasan_save_stack+0x22/0x50 [ 30.486772] kasan_set_track+0x25/0x30 [ 30.487375] kasan_save_free_info+0x2b/0x50 [ 30.488012] __kasan_slab_free+0x10a/0x190 [ 30.488648] kmem_cache_free+0x10d/0x4d0 [ 30.489267] rcu_core+0x8c8/0x2860 [ 30.489806] __do_softirq+0x1b7/0x7d4 [ 30.490385] [ 30.490644] Last potentially related work creation: [ 30.491367] kasan_save_stack+0x22/0x50 [ 30.491968] __kasan_record_aux_stack+0x8e/0xa0 [ 30.492650] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.493406] remove_vma+0x139/0x170 [ 30.493940] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.494603] do_vmi_munmap+0x1f1/0x2b0 [ 30.495179] __vm_munmap+0x138/0x3a0 [ 30.495745] __x64_sys_munmap+0x59/0x80 [ 30.496335] do_syscall_64+0x3f/0x90 [ 30.496895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.497654] [ 30.497906] The buggy address belongs to the object at ffff888015a8acb0 [ 30.497906] which belongs to the cache vm_area_struct of size 168 [ 30.499662] The buggy address is located 88 bytes inside of [ 30.499662] freed 168-byte region [ffff888015a8acb0, ffff888015a8ad58) [ 30.501322] [ 30.501576] The buggy address belongs to the physical page: [ 30.502369] page:00000000666c794b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a8a [ 30.503704] memcg:ffff88800d579701 [ 30.504210] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.504972] page_type: 0xffffffff() [ 30.505514] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.506601] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d579701 [ 30.507695] page dumped because: kasan: bad access detected [ 30.508481] [ 30.508736] Memory state around the buggy address: [ 30.509428] ffff888015a8ac00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.510435] ffff888015a8ac80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.511456] >ffff888015a8ad00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.512465] ^ [ 30.512987] ffff888015a8ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.514006] ffff888015a8ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.515009] ================================================================== [ 30.516139] Disabling lock debugging due to kernel taint [ 32.845900] BUG: Bad rss-counter state mm:00000000773018af type:MM_FILEPAGES val:33 [ 32.847103] BUG: Bad rss-counter state mm:00000000773018af type:MM_ANONPAGES val:22 [ 33.295263] BUG: Bad rss-counter state mm:0000000044206ebf type:MM_FILEPAGES val:33 [ 33.296327] BUG: Bad rss-counter state mm:0000000044206ebf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33810' (ECDSA) to the list of known hosts. 2023/06/21 10:45:35 fuzzer started 2023/06/21 10:45:35 dialing manager at localhost:36067 2023/06/21 10:45:35 checking machine... 2023/06/21 10:45:35 checking revisions... [ 34.005335] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:45:35 testing simple program... [ 34.041552] cgroup: Unknown subsys name 'net' [ 34.091509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:45:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=ffffffff85408000 RDX=ffffffff85407d01 RSI=0000000000000001 RDI=ffff88806ce09aa8 RBP=ffffffff85407d60 RSP=ffff88806ce099f8 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5305 R12=0000000000000008 R13=ffffffff85400000 R14=ffffffff85408000 R15=ffff88806ce09a98 RIP=ffffffff811304cd 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 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=00007ffd4de53848 CR3=000000000cbc6000 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=2034333a35343a3031203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a35343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000055c09a8f RCX=ffff88806c44d478 RDX=000000000000000c RSI=ffffffff8180effe RDI=00000000f2bd9846 RBP=ffff8880102e0f60 RSP=ffff888009bc79a8 R8 =00000000d6092403 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff888009bc7a10 R15=000000000000000c RIP=ffffffff822704fc RFL=00000202 [-------] 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 00007fd1f1ad1900 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=00007fd1f2088618 CR3=000000000e55c000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000