syzkaller login: [ 38.099564] BUG: Bad rss-counter state mm:00000000de43d95e type:MM_FILEPAGES val:33 [ 38.101006] BUG: Bad rss-counter state mm:00000000de43d95e type:MM_ANONPAGES val:22 [ 38.242213] ================================================================== [ 38.243107] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.244074] Read of size 8 at addr ffff88800ebaa968 by task sshd/221 [ 38.244843] [ 38.245069] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.246033] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.247015] Call Trace: [ 38.247338] [ 38.247621] dump_stack_lvl+0x91/0xf0 [ 38.248137] print_report+0xcc/0x620 [ 38.248634] ? __virt_addr_valid+0x102/0x340 [ 38.249187] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.249803] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.250424] kasan_report+0xbe/0xf0 [ 38.250913] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.251543] vma_interval_tree_remove+0xc75/0xec0 [ 38.252162] vma_prepare+0xc54/0x11a0 [ 38.252648] __split_vma+0x5af/0x950 [ 38.253119] ? __pfx___split_vma+0x10/0x10 [ 38.253647] ? find_held_lock+0x2c/0x110 [ 38.254176] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.254754] ? lock_is_held_type+0x9f/0x120 [ 38.255301] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.255917] ? mtree_range_walk+0x632/0x900 [ 38.256491] ? mas_walk+0x5c7/0x7c0 [ 38.256965] do_vmi_munmap+0x1f1/0x2b0 [ 38.257457] mmap_region+0x1f9/0x2660 [ 38.257937] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.258452] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.259163] ? __pfx_lock_acquire+0x10/0x10 [ 38.259695] ? __pfx_mmap_region+0x10/0x10 [ 38.260239] ? security_mmap_addr+0x7d/0xa0 [ 38.260775] ? get_unmapped_area+0x1f5/0x3f0 [ 38.261326] do_mmap+0x854/0xf00 [ 38.261766] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.262260] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.262833] ksys_mmap_pgoff+0x3af/0x500 [ 38.263342] do_syscall_64+0x3f/0x90 [ 38.263813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.264477] RIP: 0033:0x7fdc8128ad82 [ 38.264949] 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 [ 38.267078] RSP: 002b:00007ffda4d446c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.267987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdc8128ad82 [ 38.268855] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdc806c4000 [ 38.269717] RBP: 00007fdc806c4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.270560] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c12f58ec0 [ 38.271417] R13: 00007ffda4d446e0 R14: 00007ffda4d44710 R15: 00007ffda4d44a70 [ 38.272300] [ 38.272592] [ 38.272809] Allocated by task 214: [ 38.273242] kasan_save_stack+0x22/0x50 [ 38.273748] kasan_set_track+0x25/0x30 [ 38.274235] __kasan_slab_alloc+0x59/0x70 [ 38.274757] kmem_cache_alloc+0x16b/0x370 [ 38.275281] vm_area_dup+0x20/0x160 [ 38.275734] __split_vma+0x170/0x950 [ 38.276206] split_vma+0xc6/0x110 [ 38.276652] mprotect_fixup+0x8d2/0xb30 [ 38.277154] do_mprotect_pkey+0x87e/0xd40 [ 38.277676] __x64_sys_mprotect+0x78/0xc0 [ 38.278194] do_syscall_64+0x3f/0x90 [ 38.278666] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.279301] [ 38.279520] Freed by task 214: [ 38.279907] kasan_save_stack+0x22/0x50 [ 38.280434] kasan_set_track+0x25/0x30 [ 38.280931] kasan_save_free_info+0x2b/0x50 [ 38.281466] __kasan_slab_free+0x10a/0x190 [ 38.281995] kmem_cache_free+0x10d/0x4d0 [ 38.282516] rcu_core+0x8c8/0x2860 [ 38.282962] __do_softirq+0x1b7/0x7d4 [ 38.283437] [ 38.283654] Last potentially related work creation: [ 38.284251] kasan_save_stack+0x22/0x50 [ 38.284757] __kasan_record_aux_stack+0x8e/0xa0 [ 38.285334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.285979] remove_vma+0x139/0x170 [ 38.286428] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.286976] do_vmi_munmap+0x1f1/0x2b0 [ 38.287470] __vm_munmap+0x138/0x3a0 [ 38.287938] __x64_sys_munmap+0x59/0x80 [ 38.288447] do_syscall_64+0x3f/0x90 [ 38.288924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.289562] [ 38.289780] The buggy address belongs to the object at ffff88800ebaa910 [ 38.289780] which belongs to the cache vm_area_struct of size 168 [ 38.291230] The buggy address is located 88 bytes inside of [ 38.291230] freed 168-byte region [ffff88800ebaa910, ffff88800ebaa9b8) [ 38.292643] [ 38.292862] The buggy address belongs to the physical page: [ 38.293525] page:0000000086874f0e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebaa [ 38.294599] memcg:ffff88800e554d01 [ 38.295027] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.295671] page_type: 0xffffffff() [ 38.296135] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.297046] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e554d01 [ 38.297953] page dumped because: kasan: bad access detected [ 38.298618] [ 38.298840] Memory state around the buggy address: [ 38.299417] ffff88800ebaa800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.300279] ffff88800ebaa880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.301131] >ffff88800ebaa900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.301976] ^ [ 38.302760] ffff88800ebaa980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.303615] ffff88800ebaaa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.304474] ================================================================== [ 38.305580] Disabling lock debugging due to kernel taint [ 40.933241] BUG: Bad rss-counter state mm:000000001f5111b1 type:MM_FILEPAGES val:33 [ 40.934258] BUG: Bad rss-counter state mm:000000001f5111b1 type:MM_ANONPAGES val:22 [ 41.366400] BUG: Bad rss-counter state mm:00000000a7665aab type:MM_FILEPAGES val:33 [ 41.367299] BUG: Bad rss-counter state mm:00000000a7665aab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58593' (ECDSA) to the list of known hosts. 2023/06/20 05:27:07 fuzzer started 2023/06/20 05:27:07 dialing manager at localhost:44161 2023/06/20 05:27:07 checking machine... 2023/06/20 05:27:07 checking revisions... [ 42.105905] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:27:07 testing simple program... [ 42.160294] cgroup: Unknown subsys name 'net' [ 42.213114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:26:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000058 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000035 RDI=00007fedac000bac RBP=0000000000000014 RSP=00007fedbaa56660 R8 =00000000ffffff00 R9 =00007fedbaa567e0 R10=00007fedbaa56788 R11=00007fedbaa5676c R12=0000000000000000 R13=0000000000000005 R14=00007fedac000bab R15=0000000000000059 RIP=0000564a364f5607 RFL=00000297 [--S-APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fedbaa5a700 00000000 00000000 GS =0000 0000000000000000 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=00007fc21c433f20 CR3=0000000016a14000 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=37323a3530203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38393537342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383935 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09b18 RCX=ffffffff86137501 RDX=1ffff1100d9e1365 RSI=ffffffff8180ee7e RDI=ffff88806cf09b28 RBP=ffff88806cf09ae8 RSP=ffff88806cf09a30 R8 =ffffffff8613751e R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b18 R13=0000000000000000 R14=ffff88800f30d1c0 R15=ffff88800dcfc080 RIP=ffffffff813ad446 RFL=00000286 [--S--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 00007fa97f287900 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=00007ffc0c11e000 CR3=00000000199e4000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000