syzkaller login: [ 142.867238] BUG: Bad rss-counter state mm:000000004a70e8c6 type:MM_FILEPAGES val:33 [ 142.868749] BUG: Bad rss-counter state mm:000000004a70e8c6 type:MM_ANONPAGES val:22 [ 143.020950] ================================================================== [ 143.022016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 143.023191] Read of size 8 at addr ffff8880144ed228 by task sshd/221 [ 143.024095] [ 143.024305] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 143.025262] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 143.026177] Call Trace: [ 143.026478] [ 143.026746] dump_stack_lvl+0x91/0xf0 [ 143.027218] print_report+0xcc/0x620 [ 143.027676] ? __virt_addr_valid+0x102/0x340 [ 143.028200] ? vma_interval_tree_remove+0xc75/0xec0 [ 143.028783] ? vma_interval_tree_remove+0xc75/0xec0 [ 143.029361] kasan_report+0xbe/0xf0 [ 143.029812] ? vma_interval_tree_remove+0xc75/0xec0 [ 143.030398] vma_interval_tree_remove+0xc75/0xec0 [ 143.031013] vma_prepare+0xc54/0x11a0 [ 143.031575] __split_vma+0x5af/0x950 [ 143.032130] ? __pfx___split_vma+0x10/0x10 [ 143.032748] ? find_held_lock+0x2c/0x110 [ 143.033357] do_vmi_align_munmap+0x2ba/0x11f0 [ 143.034014] ? lock_is_held_type+0x9f/0x120 [ 143.034643] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 143.035371] ? mtree_range_walk+0x632/0x900 [ 143.036016] ? mas_walk+0x5c7/0x7c0 [ 143.036570] do_vmi_munmap+0x1f1/0x2b0 [ 143.037149] mmap_region+0x1f9/0x2660 [ 143.037713] ? vm_mmap_pgoff+0x15c/0x3a0 [ 143.038316] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 143.039164] ? __pfx_lock_acquire+0x10/0x10 [ 143.039788] ? __pfx_mmap_region+0x10/0x10 [ 143.040412] ? security_mmap_addr+0x7d/0xa0 [ 143.041034] ? get_unmapped_area+0x1f5/0x3f0 [ 143.041678] do_mmap+0x854/0xf00 [ 143.042191] vm_mmap_pgoff+0x1a6/0x3a0 [ 143.042769] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 143.043448] ksys_mmap_pgoff+0x3af/0x500 [ 143.044042] do_syscall_64+0x3f/0x90 [ 143.044601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 143.045358] RIP: 0033:0x7f994b15cd82 [ 143.045894] 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 [ 143.048408] RSP: 002b:00007ffd1684ce58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 143.049472] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f994b15cd82 [ 143.050466] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f994a596000 [ 143.051467] RBP: 00007f994a596000 R08: 0000000000000009 R09: 0000000000001000 [ 143.052459] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561b5ec72d90 [ 143.053455] R13: 00007ffd1684ce70 R14: 00007ffd1684cea0 R15: 00007ffd1684d200 [ 143.054459] [ 143.054801] [ 143.055070] Allocated by task 214: [ 143.055574] kasan_save_stack+0x22/0x50 [ 143.056159] kasan_set_track+0x25/0x30 [ 143.056714] __kasan_slab_alloc+0x59/0x70 [ 143.057299] kmem_cache_alloc+0x16b/0x370 [ 143.057873] vm_area_dup+0x20/0x160 [ 143.058381] __split_vma+0x170/0x950 [ 143.058906] split_vma+0xc6/0x110 [ 143.059411] mprotect_fixup+0x8d2/0xb30 [ 143.059976] do_mprotect_pkey+0x87e/0xd40 [ 143.060555] __x64_sys_mprotect+0x78/0xc0 [ 143.061140] do_syscall_64+0x3f/0x90 [ 143.061668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 143.062382] [ 143.062627] Freed by task 214: [ 143.063092] kasan_save_stack+0x22/0x50 [ 143.063651] kasan_set_track+0x25/0x30 [ 143.064208] kasan_save_free_info+0x2b/0x50 [ 143.064799] __kasan_slab_free+0x10a/0x190 [ 143.065459] kmem_cache_free+0x10d/0x4d0 [ 143.066082] rcu_core+0x8c8/0x2860 [ 143.066633] __do_softirq+0x1b7/0x7d4 [ 143.067238] [ 143.067503] Last potentially related work creation: [ 143.068235] kasan_save_stack+0x22/0x50 [ 143.068859] __kasan_record_aux_stack+0x8e/0xa0 [ 143.069575] __call_rcu_common.constprop.0+0x6a/0xb90 [ 143.070373] remove_vma+0x139/0x170 [ 143.070936] do_vmi_align_munmap+0xd4a/0x11f0 [ 143.071649] do_vmi_munmap+0x1f1/0x2b0 [ 143.072258] __vm_munmap+0x138/0x3a0 [ 143.072841] __x64_sys_munmap+0x59/0x80 [ 143.073464] do_syscall_64+0x3f/0x90 [ 143.074054] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 143.074846] [ 143.075126] The buggy address belongs to the object at ffff8880144ed1d0 [ 143.075126] which belongs to the cache vm_area_struct of size 168 [ 143.076953] The buggy address is located 88 bytes inside of [ 143.076953] freed 168-byte region [ffff8880144ed1d0, ffff8880144ed278) [ 143.078692] [ 143.078957] The buggy address belongs to the physical page: [ 143.079798] page:00000000d1d7386b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x144ed [ 143.081159] memcg:ffff88800dad9301 [ 143.081689] flags: 0x100000000000200(slab|node=0|zone=1) [ 143.082495] page_type: 0xffffffff() [ 143.083075] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 143.084215] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dad9301 [ 143.085342] page dumped because: kasan: bad access detected [ 143.086151] [ 143.086415] Memory state around the buggy address: [ 143.087149] ffff8880144ed100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 143.088218] ffff8880144ed180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 143.089281] >ffff8880144ed200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 143.090331] ^ [ 143.091043] ffff8880144ed280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 143.092097] ffff8880144ed300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 143.093156] ================================================================== [ 143.094341] Disabling lock debugging due to kernel taint [ 144.639949] BUG: Bad rss-counter state mm:0000000010cc48bc type:MM_FILEPAGES val:33 [ 144.640718] BUG: Bad rss-counter state mm:0000000010cc48bc type:MM_ANONPAGES val:22 [ 145.136236] BUG: Bad rss-counter state mm:0000000002927579 type:MM_FILEPAGES val:33 [ 145.137460] BUG: Bad rss-counter state mm:0000000002927579 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60362' (ECDSA) to the list of known hosts. 2023/06/19 10:55:58 fuzzer started 2023/06/19 10:55:59 dialing manager at localhost:44161 2023/06/19 10:55:59 checking machine... 2023/06/19 10:55:59 checking revisions... [ 145.868624] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:55:59 testing simple program... [ 145.908546] cgroup: Unknown subsys name 'net' [ 145.946728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe78cfae48 CR3=0000000005482000 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=00007fb2098e45100000558c96751790 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 info registers vcpu 1 RAX=000000000002c9ea RBX=0000000000000001 RCX=ffffffff81b4bd54 RDX=000000000002c9f8 RSI=000000000000b4bd RDI=ffffffff8617df9c RBP=ffff888014767600 RSP=ffff888014767538 R8 =ffffffff8617df48 R9 =ffff8880147675e8 R10=0000000000038001 R11=000000000002c9ea R12=ffff888014767608 R13=ffff8880147675f0 R14=ffff8880147675e9 R15=ffff8880147675a8 RIP=ffffffff81130868 RFL=00000283 [--S---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff82ed3a900 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=00007ff82e26e038 CR3=000000000c580000 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=0000000000000000646873733d4d4d4f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=61d8c6efc5c908c500000000000ae988 XMM05=db7dc970b7f97f350000000000148cf0 XMM06=6f90d1cec489f9070000000000147a90 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000