syzkaller login: [ 30.919108] BUG: Bad rss-counter state mm:0000000013942ec7 type:MM_FILEPAGES val:33 [ 30.920300] BUG: Bad rss-counter state mm:0000000013942ec7 type:MM_ANONPAGES val:22 [ 30.955021] ================================================================== [ 30.955995] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.956975] Read of size 8 at addr ffff888009716798 by task sshd/222 [ 30.957852] [ 30.958117] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.959007] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.959985] Call Trace: [ 30.960308] [ 30.960600] dump_stack_lvl+0x91/0xf0 [ 30.961103] print_report+0xcc/0x620 [ 30.961590] ? __virt_addr_valid+0x102/0x340 [ 30.962141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.962762] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.963387] kasan_report+0xbe/0xf0 [ 30.963869] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.964503] vma_interval_tree_remove+0xc75/0xec0 [ 30.965110] vma_prepare+0xc54/0x11a0 [ 30.965597] __split_vma+0x5af/0x950 [ 30.966070] ? __pfx___split_vma+0x10/0x10 [ 30.966712] ? find_held_lock+0x2c/0x110 [ 30.967252] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.967824] ? lock_is_held_type+0x9f/0x120 [ 30.968367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.968997] ? mtree_range_walk+0x632/0x900 [ 30.969552] ? mas_walk+0x5c7/0x7c0 [ 30.970031] do_vmi_munmap+0x1f1/0x2b0 [ 30.970532] mmap_region+0x1f9/0x2660 [ 30.971018] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.971534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.972248] ? __pfx_lock_acquire+0x10/0x10 [ 30.972788] ? __pfx_mmap_region+0x10/0x10 [ 30.973323] ? security_mmap_addr+0x7d/0xa0 [ 30.973856] ? get_unmapped_area+0x1f5/0x3f0 [ 30.974410] do_mmap+0x854/0xf00 [ 30.974858] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.975359] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.975920] ksys_mmap_pgoff+0x3af/0x500 [ 30.976435] do_syscall_64+0x3f/0x90 [ 30.976929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.977583] RIP: 0033:0x7f9b6ff3ad82 [ 30.978042] 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 [ 30.980195] RSP: 002b:00007ffed6507538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.981124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b6ff3ad82 [ 30.981984] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b6f374000 [ 30.982841] RBP: 00007f9b6f374000 R08: 0000000000000009 R09: 0000000000001000 [ 30.983695] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620adb1af60 [ 30.984563] R13: 00007ffed6507550 R14: 00007ffed6507580 R15: 00007ffed65078e0 [ 30.985432] [ 30.985724] [ 30.985940] Allocated by task 215: [ 30.986374] kasan_save_stack+0x22/0x50 [ 30.986882] kasan_set_track+0x25/0x30 [ 30.987389] __kasan_slab_alloc+0x59/0x70 [ 30.987915] kmem_cache_alloc+0x16b/0x370 [ 30.988434] vm_area_dup+0x20/0x160 [ 30.988903] __split_vma+0x170/0x950 [ 30.989368] split_vma+0xc6/0x110 [ 30.989812] mprotect_fixup+0x8d2/0xb30 [ 30.990315] do_mprotect_pkey+0x87e/0xd40 [ 30.990844] __x64_sys_mprotect+0x78/0xc0 [ 30.991372] do_syscall_64+0x3f/0x90 [ 30.991846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.992503] [ 30.992725] Freed by task 215: [ 30.993120] kasan_save_stack+0x22/0x50 [ 30.993623] kasan_set_track+0x25/0x30 [ 30.994122] kasan_save_free_info+0x2b/0x50 [ 30.994656] __kasan_slab_free+0x10a/0x190 [ 30.995198] kmem_cache_free+0x10d/0x4d0 [ 30.995708] rcu_core+0x8c8/0x2860 [ 30.996159] __do_softirq+0x1b7/0x7d4 [ 30.996645] [ 30.996860] Last potentially related work creation: [ 30.997447] kasan_save_stack+0x22/0x50 [ 30.997963] __kasan_record_aux_stack+0x8e/0xa0 [ 30.998548] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.999198] remove_vma+0x139/0x170 [ 30.999650] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.000215] do_vmi_munmap+0x1f1/0x2b0 [ 31.000716] __vm_munmap+0x138/0x3a0 [ 31.001187] __x64_sys_munmap+0x59/0x80 [ 31.001689] do_syscall_64+0x3f/0x90 [ 31.002169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.002830] [ 31.003045] The buggy address belongs to the object at ffff888009716740 [ 31.003045] which belongs to the cache vm_area_struct of size 168 [ 31.004537] The buggy address is located 88 bytes inside of [ 31.004537] freed 168-byte region [ffff888009716740, ffff8880097167e8) [ 31.005946] [ 31.006164] The buggy address belongs to the physical page: [ 31.006841] page:000000002d737c53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9716 [ 31.007923] memcg:ffff8880192e1101 [ 31.008350] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.009067] page_type: 0xffffffff() [ 31.009529] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b7800 dead000000000003 [ 31.010443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880192e1101 [ 31.011404] page dumped because: kasan: bad access detected [ 31.012059] [ 31.012277] Memory state around the buggy address: [ 31.012881] ffff888009716680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.013740] ffff888009716700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.014600] >ffff888009716780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.015465] ^ [ 31.015962] ffff888009716800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.016837] ffff888009716880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.017698] ================================================================== [ 31.018862] Disabling lock debugging due to kernel taint [ 33.341600] BUG: Bad rss-counter state mm:00000000ae3d6b70 type:MM_FILEPAGES val:33 [ 33.342765] BUG: Bad rss-counter state mm:00000000ae3d6b70 type:MM_ANONPAGES val:22 [ 33.811526] BUG: Bad rss-counter state mm:000000007c2c7218 type:MM_FILEPAGES val:33 [ 33.812782] BUG: Bad rss-counter state mm:000000007c2c7218 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28315' (ECDSA) to the list of known hosts. 2023/06/21 01:06:52 fuzzer started 2023/06/21 01:06:52 dialing manager at localhost:36067 2023/06/21 01:06:52 checking machine... 2023/06/21 01:06:52 checking revisions... [ 34.533809] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:06:52 testing simple program... [ 34.586339] cgroup: Unknown subsys name 'net' [ 34.632716] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:52 Registers: info registers vcpu 0 RAX=1ffffffff0bf4a77 RBX=ffffffff85fa53b8 RCX=ffffffff8363e063 RDX=0000000000000000 RSI=ffffffff863b3bde RDI=ffffffff85fa53a8 RBP=ffffffff85fa53a8 RSP=ffff888017f4f4d8 R8 =ffffffff863b3bde R9 =ffff888017f4f5d0 R10=0000000000038001 R11=000000000008aa79 R12=ffffffff85fa53c8 R13=ffffffff85fa53a8 R14=ffffffff85fa53a8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f8318949900 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=00007f8318efe650 CR3=00000000190f6000 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=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100207fe7e RSP=ffff8880103ff3e0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=0000000000000d40 RIP=ffffffff812d86ea 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff40c6d6900 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=00007ff40bb5fe90 CR3=000000000ee0e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b7e3cc2c9134d95900000000000ae988 XMM05=a37d014bd578c1d60000000000132bf8 XMM06=00c3ffa147b8d85700000000001319e8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000