syzkaller login: [ 30.029314] BUG: Bad rss-counter state mm:00000000d513e07e type:MM_FILEPAGES val:33 [ 30.029950] BUG: Bad rss-counter state mm:00000000d513e07e type:MM_ANONPAGES val:22 [ 30.208867] ================================================================== [ 30.210061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.211473] Read of size 8 at addr ffff88801a3464e0 by task sshd/220 [ 30.212329] [ 30.212576] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.213555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.214655] Call Trace: [ 30.215036] [ 30.215360] dump_stack_lvl+0x91/0xf0 [ 30.215911] print_report+0xcc/0x620 [ 30.216464] ? __virt_addr_valid+0x102/0x340 [ 30.217082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.217785] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.218503] kasan_report+0xbe/0xf0 [ 30.219064] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.219784] vma_interval_tree_remove+0xc75/0xec0 [ 30.220482] vma_prepare+0xc54/0x11a0 [ 30.221036] __split_vma+0x5af/0x950 [ 30.221594] ? __pfx___split_vma+0x10/0x10 [ 30.222209] ? find_held_lock+0x2c/0x110 [ 30.222844] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.223510] ? lock_is_held_type+0x9f/0x120 [ 30.224145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.224860] ? mtree_range_walk+0x632/0x900 [ 30.225512] ? mas_walk+0x5c7/0x7c0 [ 30.226066] do_vmi_munmap+0x1f1/0x2b0 [ 30.226638] mmap_region+0x1f9/0x2660 [ 30.227215] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.227817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.228658] ? __pfx_lock_acquire+0x10/0x10 [ 30.229284] ? __pfx_mmap_region+0x10/0x10 [ 30.229854] ? security_mmap_addr+0x7d/0xa0 [ 30.230382] ? get_unmapped_area+0x1f5/0x3f0 [ 30.230949] do_mmap+0x854/0xf00 [ 30.231383] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.231875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.232432] ksys_mmap_pgoff+0x3af/0x500 [ 30.232935] do_syscall_64+0x3f/0x90 [ 30.233417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.234054] RIP: 0033:0x7f9dd106ad82 [ 30.234508] 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 [ 30.236629] RSP: 002b:00007ffd3051b3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.237532] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9dd106ad82 [ 30.238386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9dd04a4000 [ 30.239241] RBP: 00007f9dd04a4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.240083] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cc5e2bdec0 [ 30.240928] R13: 00007ffd3051b3f0 R14: 00007ffd3051b420 R15: 00007ffd3051b780 [ 30.241786] [ 30.242077] [ 30.242294] Allocated by task 213: [ 30.242729] kasan_save_stack+0x22/0x50 [ 30.243252] kasan_set_track+0x25/0x30 [ 30.243748] __kasan_slab_alloc+0x59/0x70 [ 30.244275] kmem_cache_alloc+0x16b/0x370 [ 30.244802] vm_area_dup+0x20/0x160 [ 30.245256] __split_vma+0x170/0x950 [ 30.245727] split_vma+0xc6/0x110 [ 30.246168] mprotect_fixup+0x8d2/0xb30 [ 30.246676] do_mprotect_pkey+0x87e/0xd40 [ 30.247212] __x64_sys_mprotect+0x78/0xc0 [ 30.247739] do_syscall_64+0x3f/0x90 [ 30.248215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.248866] [ 30.249082] Freed by task 203: [ 30.249477] kasan_save_stack+0x22/0x50 [ 30.249983] kasan_set_track+0x25/0x30 [ 30.250483] kasan_save_free_info+0x2b/0x50 [ 30.251025] __kasan_slab_free+0x10a/0x190 [ 30.251563] kmem_cache_free+0x10d/0x4d0 [ 30.252084] rcu_core+0x8c8/0x2860 [ 30.252541] __do_softirq+0x1b7/0x7d4 [ 30.253142] [ 30.253361] Last potentially related work creation: [ 30.253954] kasan_save_stack+0x22/0x50 [ 30.254473] __kasan_record_aux_stack+0x8e/0xa0 [ 30.255065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.255724] remove_vma+0x139/0x170 [ 30.256184] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.256756] do_vmi_munmap+0x1f1/0x2b0 [ 30.257252] __vm_munmap+0x138/0x3a0 [ 30.257727] __x64_sys_munmap+0x59/0x80 [ 30.258240] do_syscall_64+0x3f/0x90 [ 30.258735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.259431] [ 30.259662] The buggy address belongs to the object at ffff88801a346488 [ 30.259662] which belongs to the cache vm_area_struct of size 168 [ 30.261186] The buggy address is located 88 bytes inside of [ 30.261186] freed 168-byte region [ffff88801a346488, ffff88801a346530) [ 30.262636] [ 30.262882] The buggy address belongs to the physical page: [ 30.263569] page:000000004940e262 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a346 [ 30.264701] memcg:ffff88801a3d3c01 [ 30.265147] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.265822] page_type: 0xffffffff() [ 30.266292] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.267268] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3d3c01 [ 30.268224] page dumped because: kasan: bad access detected [ 30.268916] [ 30.269142] Memory state around the buggy address: [ 30.269746] ffff88801a346380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.270643] ffff88801a346400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.271549] >ffff88801a346480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.272466] ^ [ 30.273280] ffff88801a346500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.274189] ffff88801a346580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.275100] ================================================================== [ 30.276111] Disabling lock debugging due to kernel taint [ 32.273074] BUG: Bad rss-counter state mm:00000000753fa512 type:MM_FILEPAGES val:33 [ 32.274026] BUG: Bad rss-counter state mm:00000000753fa512 type:MM_ANONPAGES val:22 [ 32.848964] BUG: Bad rss-counter state mm:000000003e1997b9 type:MM_FILEPAGES val:33 [ 32.850251] BUG: Bad rss-counter state mm:000000003e1997b9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45877' (ECDSA) to the list of known hosts. 2023/06/21 00:20:49 fuzzer started 2023/06/21 00:20:51 dialing manager at localhost:36067 2023/06/21 00:20:51 checking machine... 2023/06/21 00:20:51 checking revisions... [ 34.383671] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:20:51 testing simple program... [ 34.427947] cgroup: Unknown subsys name 'net' [ 34.481647] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 00:20:49 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880165f7a40 RCX=0000000000000000 RDX=1ffff11002cbef3a RSI=0000000000000000 RDI=ffff8880165f7a18 RBP=ffff888017efd1c0 RSP=ffff8880165f7958 R8 =ffff888015d79cc0 R9 =0000000000000000 R10=ffff8880165f79a8 R11=0000000000000001 R12=0000000000000000 R13=ffff8880165f79d0 R14=ffff888017efd1c0 R15=ffff8880165f79a8 RIP=ffffffff81132ac0 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 00007fa8da19b900 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=00007fffe2e3b000 CR3=000000000cbf8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000033 RCX=ffffffff813782c0 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800e90a1b0 RBP=0000000000000034 RSP=ffff88806cf09e58 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff88800e90a1b0 RIP=ffffffff81845e10 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 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=000055db5dc96c78 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=00007f654d300510000055db5dc94790 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