syzkaller login: [ 43.381748] BUG: Bad rss-counter state mm:00000000ec24cc20 type:MM_FILEPAGES val:33 [ 43.382945] BUG: Bad rss-counter state mm:00000000ec24cc20 type:MM_ANONPAGES val:22 [ 43.492647] ================================================================== [ 43.493734] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.494960] Read of size 8 at addr ffff88800e0503f8 by task sshd/220 [ 43.495753] [ 43.495972] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.496839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.497809] Call Trace: [ 43.498126] [ 43.498411] dump_stack_lvl+0x91/0xf0 [ 43.498902] print_report+0xcc/0x620 [ 43.499397] ? __virt_addr_valid+0x102/0x340 [ 43.499945] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.500569] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.501182] kasan_report+0xbe/0xf0 [ 43.501665] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.502283] vma_interval_tree_remove+0xc75/0xec0 [ 43.502891] vma_prepare+0xc54/0x11a0 [ 43.503397] __split_vma+0x5af/0x950 [ 43.503868] ? __pfx___split_vma+0x10/0x10 [ 43.504397] ? find_held_lock+0x2c/0x110 [ 43.504928] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.505502] ? lock_is_held_type+0x9f/0x120 [ 43.506040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.506645] ? mtree_range_walk+0x632/0x900 [ 43.507212] ? mas_walk+0x5c7/0x7c0 [ 43.507699] do_vmi_munmap+0x1f1/0x2b0 [ 43.508198] mmap_region+0x1f9/0x2660 [ 43.508689] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.509200] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.509921] ? __pfx_lock_acquire+0x10/0x10 [ 43.510467] ? __pfx_mmap_region+0x10/0x10 [ 43.510994] ? security_mmap_addr+0x7d/0xa0 [ 43.511552] ? get_unmapped_area+0x1f5/0x3f0 [ 43.512102] do_mmap+0x854/0xf00 [ 43.512541] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.513040] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.513613] ksys_mmap_pgoff+0x3af/0x500 [ 43.514130] do_syscall_64+0x3f/0x90 [ 43.514609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.515270] RIP: 0033:0x7f457746cd82 [ 43.515734] 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 [ 43.517886] RSP: 002b:00007ffd7c92e898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.518786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f457746cd82 [ 43.519653] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f45768a6000 [ 43.520501] RBP: 00007f45768a6000 R08: 0000000000000009 R09: 0000000000001000 [ 43.521350] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c7bba9ec0 [ 43.522208] R13: 00007ffd7c92e8b0 R14: 00007ffd7c92e8e0 R15: 00007ffd7c92ec40 [ 43.523063] [ 43.523376] [ 43.523591] Allocated by task 213: [ 43.524025] kasan_save_stack+0x22/0x50 [ 43.524550] kasan_set_track+0x25/0x30 [ 43.525052] __kasan_slab_alloc+0x59/0x70 [ 43.525583] kmem_cache_alloc+0x16b/0x370 [ 43.526114] vm_area_dup+0x20/0x160 [ 43.526567] __split_vma+0x170/0x950 [ 43.527040] split_vma+0xc6/0x110 [ 43.527492] mprotect_fixup+0x8d2/0xb30 [ 43.527998] do_mprotect_pkey+0x87e/0xd40 [ 43.528519] __x64_sys_mprotect+0x78/0xc0 [ 43.529037] do_syscall_64+0x3f/0x90 [ 43.529514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.530158] [ 43.530375] Freed by task 213: [ 43.530766] kasan_save_stack+0x22/0x50 [ 43.531274] kasan_set_track+0x25/0x30 [ 43.531769] kasan_save_free_info+0x2b/0x50 [ 43.532305] __kasan_slab_free+0x10a/0x190 [ 43.532840] kmem_cache_free+0x10d/0x4d0 [ 43.533346] rcu_core+0x8c8/0x2860 [ 43.533794] __do_softirq+0x1b7/0x7d4 [ 43.534269] [ 43.534482] Last potentially related work creation: [ 43.535064] kasan_save_stack+0x22/0x50 [ 43.535591] __kasan_record_aux_stack+0x8e/0xa0 [ 43.536159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.536806] remove_vma+0x139/0x170 [ 43.537259] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.537812] do_vmi_munmap+0x1f1/0x2b0 [ 43.538297] __vm_munmap+0x138/0x3a0 [ 43.538769] __x64_sys_munmap+0x59/0x80 [ 43.539278] do_syscall_64+0x3f/0x90 [ 43.539748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.540396] [ 43.540613] Second to last potentially related work creation: [ 43.541300] kasan_save_stack+0x22/0x50 [ 43.541800] __kasan_record_aux_stack+0x8e/0xa0 [ 43.542381] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.543021] remove_vma+0x139/0x170 [ 43.543488] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.544041] do_vmi_munmap+0x1f1/0x2b0 [ 43.544528] mmap_region+0x1f9/0x2660 [ 43.545003] do_mmap+0x854/0xf00 [ 43.545440] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.545926] ksys_mmap_pgoff+0x3af/0x500 [ 43.546425] do_syscall_64+0x3f/0x90 [ 43.546895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.547552] [ 43.547768] The buggy address belongs to the object at ffff88800e0503a0 [ 43.547768] which belongs to the cache vm_area_struct of size 168 [ 43.549236] The buggy address is located 88 bytes inside of [ 43.549236] freed 168-byte region [ffff88800e0503a0, ffff88800e050448) [ 43.550634] [ 43.550848] The buggy address belongs to the physical page: [ 43.551514] page:00000000b6c9a2b0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe050 [ 43.552588] memcg:ffff88800cce9701 [ 43.553012] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.553654] page_type: 0xffffffff() [ 43.554106] raw: 0100000000000200 ffff88800879fc80 ffffea000035fd00 dead000000000006 [ 43.555019] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cce9701 [ 43.555940] page dumped because: kasan: bad access detected [ 43.556600] [ 43.556817] Memory state around the buggy address: [ 43.557400] ffff88800e050280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.558255] ffff88800e050300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.559123] >ffff88800e050380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.559972] ^ [ 43.560807] ffff88800e050400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.561652] ffff88800e050480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.562500] ================================================================== [ 43.563468] Disabling lock debugging due to kernel taint [ 45.372446] BUG: Bad rss-counter state mm:00000000853b382c type:MM_FILEPAGES val:33 [ 45.373434] BUG: Bad rss-counter state mm:00000000853b382c type:MM_ANONPAGES val:22 [ 45.804255] BUG: Bad rss-counter state mm:00000000798c475b type:MM_FILEPAGES val:33 [ 45.805147] BUG: Bad rss-counter state mm:00000000798c475b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30898' (ECDSA) to the list of known hosts. 2023/06/19 15:28:21 fuzzer started 2023/06/19 15:28:21 dialing manager at localhost:44161 2023/06/19 15:28:21 checking machine... 2023/06/19 15:28:21 checking revisions... [ 46.576943] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:28:21 testing simple program... [ 46.632528] cgroup: Unknown subsys name 'net' [ 46.669174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:28:09 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007eff6f27119d RCX=0000000080000000 RDX=1ffff110028ace68 RSI=ffffffff81007b50 RDI=00007eff6f27119d RBP=00007eff6f27119d RSP=ffff888014567268 R8 =ffffffff864b9d5a R9 =ffff888014567328 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880145673b0 R13=0000000000000000 R14=ffff8880144eb680 R15=0000000000092820 RIP=ffffffff814c07f1 RFL=00000203 [------C] 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 00007eff6e9a7900 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=0000560414aee768 CR3=000000000ef44000 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=af7da5c62e239cb7044d50e6194d1a56 XMM02=eff9b2d0a8fce9cb000000000011e000 XMM03=2c67c8bc2e329bc3000000000011e128 XMM04=f55c7baf3cba94ea00000000000ae988 XMM05=d5083420529144f300000000001367b0 XMM06=4fda316b135da52b0000000000135850 XMM07=fb795ef6d65770560000000000124b00 XMM08=2c67c8bc2e329bc3000000000011e128 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00007ffeb4428cc8 CR3=0000000005482000 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=00007fc9b4ec9510000055649dcd8790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000