syzkaller login: [ 40.863380] BUG: Bad rss-counter state mm:00000000fd7b53b6 type:MM_FILEPAGES val:33 [ 40.864089] BUG: Bad rss-counter state mm:00000000fd7b53b6 type:MM_ANONPAGES val:22 [ 40.992162] ================================================================== [ 40.992814] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.993437] Read of size 8 at addr ffff88800e8bb5c8 by task sshd/219 [ 40.993943] [ 40.994089] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.994708] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.995347] Call Trace: [ 40.995571] [ 40.995764] dump_stack_lvl+0x91/0xf0 [ 40.996095] print_report+0xcc/0x620 [ 40.996420] ? __virt_addr_valid+0x102/0x340 [ 40.996920] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.997339] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.997751] kasan_report+0xbe/0xf0 [ 40.998069] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.998502] vma_interval_tree_remove+0xc75/0xec0 [ 40.998916] vma_prepare+0xc54/0x11a0 [ 40.999235] __split_vma+0x5af/0x950 [ 40.999546] ? __pfx___split_vma+0x10/0x10 [ 40.999898] ? find_held_lock+0x2c/0x110 [ 41.000248] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.000627] ? lock_is_held_type+0x9f/0x120 [ 41.000988] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.001393] ? mtree_range_walk+0x632/0x900 [ 41.001761] ? mas_walk+0x5c7/0x7c0 [ 41.002084] do_vmi_munmap+0x1f1/0x2b0 [ 41.002468] mmap_region+0x1f9/0x2660 [ 41.002792] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.003135] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.003612] ? __pfx_lock_acquire+0x10/0x10 [ 41.003965] ? __pfx_mmap_region+0x10/0x10 [ 41.004321] ? security_mmap_addr+0x7d/0xa0 [ 41.004684] ? get_unmapped_area+0x1f5/0x3f0 [ 41.005050] do_mmap+0x854/0xf00 [ 41.005345] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.005679] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.006056] ksys_mmap_pgoff+0x3af/0x500 [ 41.006413] do_syscall_64+0x3f/0x90 [ 41.006732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.007157] RIP: 0033:0x7f6bb9f29d82 [ 41.007457] 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 [ 41.008852] RSP: 002b:00007fff4758b708 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.009468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bb9f29d82 [ 41.010020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bb9363000 [ 41.010593] RBP: 00007f6bb9363000 R08: 0000000000000009 R09: 0000000000001000 [ 41.011131] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a4c28bf70 [ 41.011672] R13: 00007fff4758b720 R14: 00007fff4758b750 R15: 00007fff4758bab0 [ 41.012228] [ 41.012419] [ 41.012564] Allocated by task 212: [ 41.012844] kasan_save_stack+0x22/0x50 [ 41.013177] kasan_set_track+0x25/0x30 [ 41.013498] __kasan_slab_alloc+0x59/0x70 [ 41.013842] kmem_cache_alloc+0x16b/0x370 [ 41.014180] vm_area_dup+0x20/0x160 [ 41.014522] __split_vma+0x170/0x950 [ 41.014828] split_vma+0xc6/0x110 [ 41.015117] mprotect_fixup+0x8d2/0xb30 [ 41.015447] do_mprotect_pkey+0x87e/0xd40 [ 41.015787] __x64_sys_mprotect+0x78/0xc0 [ 41.016121] do_syscall_64+0x3f/0x90 [ 41.016429] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.016855] [ 41.016999] Freed by task 212: [ 41.017257] kasan_save_stack+0x22/0x50 [ 41.017594] kasan_set_track+0x25/0x30 [ 41.017917] kasan_save_free_info+0x2b/0x50 [ 41.018295] __kasan_slab_free+0x10a/0x190 [ 41.018664] kmem_cache_free+0x10d/0x4d0 [ 41.018996] rcu_core+0x8c8/0x2860 [ 41.019287] __do_softirq+0x1b7/0x7d4 [ 41.019611] [ 41.019744] Last potentially related work creation: [ 41.020114] kasan_save_stack+0x22/0x50 [ 41.020472] __kasan_record_aux_stack+0x8e/0xa0 [ 41.020845] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.021287] remove_vma+0x139/0x170 [ 41.021577] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.021921] do_vmi_munmap+0x1f1/0x2b0 [ 41.022224] __vm_munmap+0x138/0x3a0 [ 41.022561] __x64_sys_munmap+0x59/0x80 [ 41.022826] do_syscall_64+0x3f/0x90 [ 41.023080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.023416] [ 41.023535] The buggy address belongs to the object at ffff88800e8bb570 [ 41.023535] which belongs to the cache vm_area_struct of size 168 [ 41.024297] The buggy address is located 88 bytes inside of [ 41.024297] freed 168-byte region [ffff88800e8bb570, ffff88800e8bb618) [ 41.025028] [ 41.025143] The buggy address belongs to the physical page: [ 41.025488] page:0000000000d32e4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8bb [ 41.026047] memcg:ffff88800c992101 [ 41.026298] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.026642] page_type: 0xffffffff() [ 41.026884] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 41.027365] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c992101 [ 41.027842] page dumped because: kasan: bad access detected [ 41.028188] [ 41.028303] Memory state around the buggy address: [ 41.028610] ffff88800e8bb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.029065] ffff88800e8bb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 41.029514] >ffff88800e8bb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.029955] ^ [ 41.030413] ffff88800e8bb600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 41.030927] ffff88800e8bb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.031454] ================================================================== [ 41.032106] Disabling lock debugging due to kernel taint [ 42.622598] BUG: Bad rss-counter state mm:000000001c847064 type:MM_FILEPAGES val:33 [ 42.623324] BUG: Bad rss-counter state mm:000000001c847064 type:MM_ANONPAGES val:22 [ 42.967847] BUG: Bad rss-counter state mm:00000000ee3a08df type:MM_FILEPAGES val:33 [ 42.968382] BUG: Bad rss-counter state mm:00000000ee3a08df type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62518' (ECDSA) to the list of known hosts. 2023/06/20 09:34:47 fuzzer started 2023/06/20 09:34:48 dialing manager at localhost:44161 2023/06/20 09:34:48 checking machine... 2023/06/20 09:34:48 checking revisions... [ 43.530600] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:34:48 testing simple program... [ 43.582966] cgroup: Unknown subsys name 'net' [ 43.628187] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:34:45 Registers: info registers vcpu 0 RAX=ffff888008d80001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008d7fa01 RSI=ffff888008d7fa18 RDI=ffff888008d7f988 RBP=ffff888008d7fa18 RSP=ffff888008d7f890 R8 =ffffffff86088c1e R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000008 R13=ffff888008d78000 R14=ffff888008d7fa20 R15=ffff888008d7f978 RIP=ffffffff811304ce RFL=00000286 [--S--P-] 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=00007f03af8152b0 CR3=0000000009658000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=736f6c63206e6f697463656e6e6f4300 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8609f9ba RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888008e579d0 RSP=ffff888008e57908 R8 =ffffffff8609f9be R9 =ffff888008e579b8 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e579b9 R15=ffff888008e57978 RIP=ffffffff81130b06 RFL=00000297 [--S-APC] 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 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=000055ce86b8d218 CR3=000000000e51c000 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=2037343a34333a3930203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383832303520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a34333a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000