syzkaller login: [ 38.285903] BUG: Bad rss-counter state mm:000000009e2c239c type:MM_FILEPAGES val:33 [ 38.287358] BUG: Bad rss-counter state mm:000000009e2c239c type:MM_ANONPAGES val:22 [ 38.444908] ================================================================== [ 38.445803] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.446746] Read of size 8 at addr ffff88800f682d08 by task sshd/221 [ 38.447552] [ 38.447785] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.448836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.449809] Call Trace: [ 38.450137] [ 38.450437] dump_stack_lvl+0x91/0xf0 [ 38.450977] print_report+0xcc/0x620 [ 38.451487] ? __virt_addr_valid+0x102/0x340 [ 38.452110] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.452727] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.453347] kasan_report+0xbe/0xf0 [ 38.453830] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.454453] vma_interval_tree_remove+0xc75/0xec0 [ 38.455055] vma_prepare+0xc54/0x11a0 [ 38.455536] __split_vma+0x5af/0x950 [ 38.456016] ? __pfx___split_vma+0x10/0x10 [ 38.456547] ? find_held_lock+0x2c/0x110 [ 38.457071] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.457638] ? lock_is_held_type+0x9f/0x120 [ 38.458185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.458794] ? mtree_range_walk+0x632/0x900 [ 38.459349] ? mas_walk+0x5c7/0x7c0 [ 38.459842] do_vmi_munmap+0x1f1/0x2b0 [ 38.460337] mmap_region+0x1f9/0x2660 [ 38.460824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.461346] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.462074] ? __pfx_lock_acquire+0x10/0x10 [ 38.462618] ? __pfx_mmap_region+0x10/0x10 [ 38.463153] ? security_mmap_addr+0x7d/0xa0 [ 38.463692] ? get_unmapped_area+0x1f5/0x3f0 [ 38.464259] do_mmap+0x854/0xf00 [ 38.464704] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.465196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.465765] ksys_mmap_pgoff+0x3af/0x500 [ 38.466269] do_syscall_64+0x3f/0x90 [ 38.466782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.467438] RIP: 0033:0x7fcddae27d82 [ 38.467984] 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 [ 38.470099] RSP: 002b:00007fff9c1ac2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.471004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcddae27d82 [ 38.471913] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdda261000 [ 38.472837] RBP: 00007fcdda261000 R08: 0000000000000009 R09: 0000000000001000 [ 38.473693] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fe44eedec0 [ 38.474546] R13: 00007fff9c1ac2f0 R14: 00007fff9c1ac320 R15: 00007fff9c1ac680 [ 38.475404] [ 38.475697] [ 38.475926] Allocated by task 214: [ 38.476357] kasan_save_stack+0x22/0x50 [ 38.476858] kasan_set_track+0x25/0x30 [ 38.477352] __kasan_slab_alloc+0x59/0x70 [ 38.477899] kmem_cache_alloc+0x16b/0x370 [ 38.478421] vm_area_dup+0x20/0x160 [ 38.478945] __split_vma+0x170/0x950 [ 38.479409] split_vma+0xc6/0x110 [ 38.479866] mprotect_fixup+0x8d2/0xb30 [ 38.480365] do_mprotect_pkey+0x87e/0xd40 [ 38.480884] __x64_sys_mprotect+0x78/0xc0 [ 38.481406] do_syscall_64+0x3f/0x90 [ 38.481879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.482520] [ 38.482737] Freed by task 214: [ 38.483132] kasan_save_stack+0x22/0x50 [ 38.483637] kasan_set_track+0x25/0x30 [ 38.484144] kasan_save_free_info+0x2b/0x50 [ 38.484682] __kasan_slab_free+0x10a/0x190 [ 38.485218] kmem_cache_free+0x10d/0x4d0 [ 38.485728] rcu_core+0x8c8/0x2860 [ 38.486172] __do_softirq+0x1b7/0x7d4 [ 38.486649] [ 38.486868] Last potentially related work creation: [ 38.487455] kasan_save_stack+0x22/0x50 [ 38.487975] __kasan_record_aux_stack+0x8e/0xa0 [ 38.488555] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.489197] remove_vma+0x139/0x170 [ 38.489658] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.490216] do_vmi_munmap+0x1f1/0x2b0 [ 38.490710] __vm_munmap+0x138/0x3a0 [ 38.491176] __x64_sys_munmap+0x59/0x80 [ 38.491672] do_syscall_64+0x3f/0x90 [ 38.492156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.492798] [ 38.493013] The buggy address belongs to the object at ffff88800f682cb0 [ 38.493013] which belongs to the cache vm_area_struct of size 168 [ 38.494476] The buggy address is located 88 bytes inside of [ 38.494476] freed 168-byte region [ffff88800f682cb0, ffff88800f682d58) [ 38.495890] [ 38.496110] The buggy address belongs to the physical page: [ 38.496776] page:0000000034a2cb2f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf682 [ 38.497856] memcg:ffff888015991001 [ 38.498282] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.498958] page_type: 0xffffffff() [ 38.499408] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.500426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015991001 [ 38.501332] page dumped because: kasan: bad access detected [ 38.501996] [ 38.502211] Memory state around the buggy address: [ 38.502815] ffff88800f682c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.503721] ffff88800f682c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.504618] >ffff88800f682d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.505472] ^ [ 38.505913] ffff88800f682d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.506771] ffff88800f682e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.507623] ================================================================== [ 38.508956] Disabling lock debugging due to kernel taint [ 40.168252] BUG: Bad rss-counter state mm:000000006f88a047 type:MM_FILEPAGES val:33 [ 40.169247] BUG: Bad rss-counter state mm:000000006f88a047 type:MM_ANONPAGES val:22 [ 40.621999] BUG: Bad rss-counter state mm:000000007d18de59 type:MM_FILEPAGES val:33 [ 40.623101] BUG: Bad rss-counter state mm:000000007d18de59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19367' (ECDSA) to the list of known hosts. 2023/06/19 23:25:07 fuzzer started 2023/06/19 23:25:07 dialing manager at localhost:44161 2023/06/19 23:25:07 checking machine... 2023/06/19 23:25:07 checking revisions... [ 41.308954] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:25:07 testing simple program... [ 41.368125] cgroup: Unknown subsys name 'net' [ 41.426709] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:24:58 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff8180c8da RCX=ffffffff86137d01 RDX=1ffff1100d9c135a RSI=0000000000000000 RDI=ffffffff8180c8da RBP=ffff88806ce09ad0 RSP=ffff88806ce09a50 R8 =ffffffff86137dd6 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800f1051c0 R15=ffff88800d307e00 RIP=ffffffff811fc87d RFL=00000292 [--S-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 00007f3c1408a900 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=00007ff07dec6000 CR3=0000000016ece000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=000055bbcc39b000 CR3=000000000df52000 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=2036303a35323a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a35323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000