syzkaller login: [ 38.839668] BUG: Bad rss-counter state mm:000000008d24a055 type:MM_FILEPAGES val:33 [ 38.840922] BUG: Bad rss-counter state mm:000000008d24a055 type:MM_ANONPAGES val:22 [ 39.003651] ================================================================== [ 39.004656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.005650] Read of size 8 at addr ffff88800dacb968 by task sshd/218 [ 39.006525] [ 39.006791] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.007698] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.008764] Call Trace: [ 39.009112] [ 39.009421] dump_stack_lvl+0x91/0xf0 [ 39.009952] print_report+0xcc/0x620 [ 39.010469] ? __virt_addr_valid+0x102/0x340 [ 39.011060] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.011728] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.012411] kasan_report+0xbe/0xf0 [ 39.012923] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.013594] vma_interval_tree_remove+0xc75/0xec0 [ 39.014242] vma_prepare+0xc54/0x11a0 [ 39.014757] __split_vma+0x5af/0x950 [ 39.015265] ? __pfx___split_vma+0x10/0x10 [ 39.015831] ? find_held_lock+0x2c/0x110 [ 39.016406] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.017009] ? lock_is_held_type+0x9f/0x120 [ 39.017583] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.018238] ? mtree_range_walk+0x632/0x900 [ 39.018837] ? mas_walk+0x5c7/0x7c0 [ 39.019351] do_vmi_munmap+0x1f1/0x2b0 [ 39.019884] mmap_region+0x1f9/0x2660 [ 39.020412] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.020968] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.021738] ? __pfx_lock_acquire+0x10/0x10 [ 39.022310] ? __pfx_mmap_region+0x10/0x10 [ 39.022883] ? security_mmap_addr+0x7d/0xa0 [ 39.023461] ? get_unmapped_area+0x1f5/0x3f0 [ 39.024050] do_mmap+0x854/0xf00 [ 39.024539] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.025070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.025674] ksys_mmap_pgoff+0x3af/0x500 [ 39.026224] do_syscall_64+0x3f/0x90 [ 39.026738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027433] RIP: 0033:0x7f33b2335d82 [ 39.027920] 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 [ 39.030235] RSP: 002b:00007fff275c9a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.031206] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33b2335d82 [ 39.032128] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33b176f000 [ 39.033064] RBP: 00007f33b176f000 R08: 0000000000000009 R09: 0000000000001000 [ 39.033979] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562bbd555f70 [ 39.034889] R13: 00007fff275c9a80 R14: 00007fff275c9ab0 R15: 00007fff275c9e10 [ 39.035811] [ 39.036125] [ 39.036365] Allocated by task 211: [ 39.036829] kasan_save_stack+0x22/0x50 [ 39.037373] kasan_set_track+0x25/0x30 [ 39.037902] __kasan_slab_alloc+0x59/0x70 [ 39.038464] kmem_cache_alloc+0x16b/0x370 [ 39.039021] vm_area_dup+0x20/0x160 [ 39.039513] __split_vma+0x170/0x950 [ 39.040008] split_vma+0xc6/0x110 [ 39.040487] mprotect_fixup+0x8d2/0xb30 [ 39.041026] do_mprotect_pkey+0x87e/0xd40 [ 39.041582] __x64_sys_mprotect+0x78/0xc0 [ 39.042142] do_syscall_64+0x3f/0x90 [ 39.042655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043344] [ 39.043576] Freed by task 13: [ 39.043987] kasan_save_stack+0x22/0x50 [ 39.044559] kasan_set_track+0x25/0x30 [ 39.045090] kasan_save_free_info+0x2b/0x50 [ 39.045667] __kasan_slab_free+0x10a/0x190 [ 39.046244] kmem_cache_free+0x10d/0x4d0 [ 39.046792] rcu_core+0x8c8/0x2860 [ 39.047269] __do_softirq+0x1b7/0x7d4 [ 39.047790] [ 39.048022] Last potentially related work creation: [ 39.048655] kasan_save_stack+0x22/0x50 [ 39.049191] __kasan_record_aux_stack+0x8e/0xa0 [ 39.049810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.050502] remove_vma+0x139/0x170 [ 39.050992] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.051595] do_vmi_munmap+0x1f1/0x2b0 [ 39.052121] __vm_munmap+0x138/0x3a0 [ 39.052643] __x64_sys_munmap+0x59/0x80 [ 39.053177] do_syscall_64+0x3f/0x90 [ 39.053695] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.054388] [ 39.054620] The buggy address belongs to the object at ffff88800dacb910 [ 39.054620] which belongs to the cache vm_area_struct of size 168 [ 39.056198] The buggy address is located 88 bytes inside of [ 39.056198] freed 168-byte region [ffff88800dacb910, ffff88800dacb9b8) [ 39.057726] [ 39.057957] The buggy address belongs to the physical page: [ 39.058669] page:000000004ff3b0ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdacb [ 39.059844] memcg:ffff888013f17d01 [ 39.060315] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.061071] page_type: 0xffffffff() [ 39.061556] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a8dc0 dead000000000005 [ 39.062550] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f17d01 [ 39.063531] page dumped because: kasan: bad access detected [ 39.064246] [ 39.064503] Memory state around the buggy address: [ 39.065127] ffff88800dacb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.066053] ffff88800dacb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.066982] >ffff88800dacb900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.067899] ^ [ 39.068761] ffff88800dacb980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.069694] ffff88800dacba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.070618] ================================================================== [ 39.071731] Disabling lock debugging due to kernel taint [ 41.017041] BUG: Bad rss-counter state mm:000000001cd7f4fc type:MM_FILEPAGES val:33 [ 41.017938] BUG: Bad rss-counter state mm:000000001cd7f4fc type:MM_ANONPAGES val:22 [ 41.519485] BUG: Bad rss-counter state mm:00000000e3f3a86f type:MM_FILEPAGES val:33 [ 41.520493] BUG: Bad rss-counter state mm:00000000e3f3a86f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6032' (ECDSA) to the list of known hosts. 2023/06/20 14:50:38 fuzzer started 2023/06/20 14:50:38 dialing manager at localhost:36067 2023/06/20 14:50:38 checking machine... 2023/06/20 14:50:38 checking revisions... [ 42.250123] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:50:38 testing simple program... [ 42.293335] cgroup: Unknown subsys name 'net' [ 42.366508] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:50:38 Registers: info registers vcpu 0 RAX=0000000000200008 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818a313f RDI=0000000000000000 RBP=000000075c8ce26a RSP=ffff888015df7990 R8 =0000000000000001 R9 =000000000000002e R10=0000000000000064 R11=0000000000000001 R12=ffff888015df7b5c R13=acc10c5101453ecc R14=ffff888015df7b20 R15=ffff8880094b5055 RIP=ffffffff818a31a3 RFL=00000246 [---Z-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 00007fd330c11900 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=00005641a7612768 CR3=000000000fc52000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffcc3d4ded8 CR3=000000000e41e000 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=30353a3431203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732038333a3035 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363838 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000