syzkaller login: [ 30.876040] BUG: Bad rss-counter state mm:000000003824ce99 type:MM_FILEPAGES val:33 [ 30.877659] BUG: Bad rss-counter state mm:000000003824ce99 type:MM_ANONPAGES val:22 [ 31.044573] ================================================================== [ 31.045498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.046445] Read of size 8 at addr ffff88800e049a50 by task sshd/220 [ 31.047349] [ 31.047578] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.048462] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.049457] Call Trace: [ 31.049786] <TASK> [ 31.050074] dump_stack_lvl+0x91/0xf0 [ 31.050565] print_report+0xcc/0x620 [ 31.051059] ? __virt_addr_valid+0x102/0x340 [ 31.051618] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052267] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.052887] kasan_report+0xbe/0xf0 [ 31.053366] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.053987] vma_interval_tree_remove+0xc75/0xec0 [ 31.054593] vma_prepare+0xc54/0x11a0 [ 31.055066] __split_vma+0x5af/0x950 [ 31.055533] ? __pfx___split_vma+0x10/0x10 [ 31.056082] ? find_held_lock+0x2c/0x110 [ 31.056597] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.057160] ? lock_is_held_type+0x9f/0x120 [ 31.057698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.058302] ? mtree_range_walk+0x632/0x900 [ 31.058847] ? mas_walk+0x5c7/0x7c0 [ 31.059319] do_vmi_munmap+0x1f1/0x2b0 [ 31.059804] mmap_region+0x1f9/0x2660 [ 31.060301] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.060817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.061525] ? __pfx_lock_acquire+0x10/0x10 [ 31.062064] ? __pfx_mmap_region+0x10/0x10 [ 31.062589] ? security_mmap_addr+0x7d/0xa0 [ 31.063121] ? get_unmapped_area+0x1f5/0x3f0 [ 31.063672] do_mmap+0x854/0xf00 [ 31.064140] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.064634] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.065200] ksys_mmap_pgoff+0x3af/0x500 [ 31.065700] do_syscall_64+0x3f/0x90 [ 31.066177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.066817] RIP: 0033:0x7f1c7648bd82 [ 31.067277] 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 [ 31.069410] RSP: 002b:00007ffde9aa31f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.070310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c7648bd82 [ 31.071155] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c758c5000 [ 31.072016] RBP: 00007f1c758c5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.072850] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583e44cab20 [ 31.073696] R13: 00007ffde9aa3210 R14: 00007ffde9aa3240 R15: 00007ffde9aa35a0 [ 31.074551] </TASK> [ 31.074839] [ 31.075054] Allocated by task 213: [ 31.075486] kasan_save_stack+0x22/0x50 [ 31.075997] kasan_set_track+0x25/0x30 [ 31.076487] __kasan_slab_alloc+0x59/0x70 [ 31.077012] kmem_cache_alloc+0x16b/0x370 [ 31.077524] vm_area_dup+0x20/0x160 [ 31.077972] __split_vma+0x170/0x950 [ 31.078433] split_vma+0xc6/0x110 [ 31.078870] mprotect_fixup+0x8d2/0xb30 [ 31.079373] do_mprotect_pkey+0x87e/0xd40 [ 31.079890] __x64_sys_mprotect+0x78/0xc0 [ 31.080430] do_syscall_64+0x3f/0x90 [ 31.080904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.081541] [ 31.081755] Freed by task 213: [ 31.082143] kasan_save_stack+0x22/0x50 [ 31.082641] kasan_set_track+0x25/0x30 [ 31.083129] kasan_save_free_info+0x2b/0x50 [ 31.083661] __kasan_slab_free+0x10a/0x190 [ 31.084209] kmem_cache_free+0x10d/0x4d0 [ 31.084718] rcu_core+0x8c8/0x2860 [ 31.085158] __do_softirq+0x1b7/0x7d4 [ 31.085639] [ 31.085856] Last potentially related work creation: [ 31.086451] kasan_save_stack+0x22/0x50 [ 31.086958] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.088200] remove_vma+0x139/0x170 [ 31.088660] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.089219] do_vmi_munmap+0x1f1/0x2b0 [ 31.089702] __vm_munmap+0x138/0x3a0 [ 31.090164] __x64_sys_munmap+0x59/0x80 [ 31.090653] do_syscall_64+0x3f/0x90 [ 31.091125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.091774] [ 31.091994] The buggy address belongs to the object at ffff88800e0499f8 [ 31.091994] which belongs to the cache vm_area_struct of size 168 [ 31.093459] The buggy address is located 88 bytes inside of [ 31.093459] freed 168-byte region [ffff88800e0499f8, ffff88800e049aa0) [ 31.094848] [ 31.095063] The buggy address belongs to the physical page: [ 31.095725] page:00000000f685988b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe049 [ 31.096854] memcg:ffff88800d4dd001 [ 31.097295] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.097942] page_type: 0xffffffff() [ 31.098403] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.099334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4dd001 [ 31.100248] page dumped because: kasan: bad access detected [ 31.100916] [ 31.101134] Memory state around the buggy address: [ 31.101712] ffff88800e049900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.102572] ffff88800e049980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.103425] >ffff88800e049a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104288] ^ [ 31.104987] ffff88800e049a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.105835] ffff88800e049b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.106679] ================================================================== [ 31.107702] Disabling lock debugging due to kernel taint [ 32.688837] BUG: Bad rss-counter state mm:000000001a0f7ad8 type:MM_FILEPAGES val:33 [ 32.689660] BUG: Bad rss-counter state mm:000000001a0f7ad8 type:MM_ANONPAGES val:22 [ 33.198014] BUG: Bad rss-counter state mm:000000008c22d302 type:MM_FILEPAGES val:33 [ 33.199177] BUG: Bad rss-counter state mm:000000008c22d302 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48222' (ECDSA) to the list of known hosts. 2023/06/20 21:17:58 fuzzer started 2023/06/20 21:17:58 dialing manager at localhost:36067 2023/06/20 21:17:58 checking machine... 2023/06/20 21:17:58 checking revisions... [ 33.936539] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:17:58 testing simple program... [ 33.994718] cgroup: Unknown subsys name 'net' [ 34.033210] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:17:58 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=ffffffff860a1401 RDX=1ffff1100d9c1355 RSI=0000000000000000 RDI=ffffffff8451105e RBP=ffff88806ce09aa8 RSP=ffff88806ce09a38 R8 =ffffffff860a1444 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888017e11b40 R15=ffff88800c639300 RIP=ffffffff811303b2 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 00007f053ef9a900 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=00007f053f551618 CR3=000000000c588000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f57c5be0c40 CR3=000000000c6f0000 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=fd7f63f99a759d9ec14f59cfddb392b1 XMM02=000000000011ac78eff9b2d0a8fce9cb XMM03=000000000011ad482c67c8bc2e329bc3 XMM04=acb32555034c7d6d00000000000ae988 XMM05=9a9a19dcf15631af0000000000132e70 XMM06=4fda316b135da52b0000000000131f10 XMM07=e042d86d42eb936e0000000000122428 XMM08=817bab4a1be966fb000000000011ad48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000