syzkaller login: [ 32.116731] BUG: Bad rss-counter state mm:0000000026a5dd95 type:MM_FILEPAGES val:33 [ 32.118057] BUG: Bad rss-counter state mm:0000000026a5dd95 type:MM_ANONPAGES val:22 [ 32.266122] ================================================================== [ 32.267048] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.268001] Read of size 8 at addr ffff88800e88d058 by task sshd/220 [ 32.268772] [ 32.268991] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.269968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.271012] Call Trace: [ 32.271358] <TASK> [ 32.271649] dump_stack_lvl+0x91/0xf0 [ 32.272153] print_report+0xcc/0x620 [ 32.272653] ? __virt_addr_valid+0x102/0x340 [ 32.273221] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.273858] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.274493] kasan_report+0xbe/0xf0 [ 32.274999] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.275666] vma_interval_tree_remove+0xc75/0xec0 [ 32.276282] vma_prepare+0xc54/0x11a0 [ 32.276762] __split_vma+0x5af/0x950 [ 32.277253] ? __pfx___split_vma+0x10/0x10 [ 32.277781] ? find_held_lock+0x2c/0x110 [ 32.278312] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.278892] ? lock_is_held_type+0x9f/0x120 [ 32.279440] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.280069] ? mtree_range_walk+0x632/0x900 [ 32.280642] ? mas_walk+0x5c7/0x7c0 [ 32.281125] do_vmi_munmap+0x1f1/0x2b0 [ 32.281620] mmap_region+0x1f9/0x2660 [ 32.282107] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.282613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.283360] ? __pfx_lock_acquire+0x10/0x10 [ 32.283894] ? __pfx_mmap_region+0x10/0x10 [ 32.284431] ? security_mmap_addr+0x7d/0xa0 [ 32.284959] ? get_unmapped_area+0x1f5/0x3f0 [ 32.285508] do_mmap+0x854/0xf00 [ 32.285952] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.286452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.287026] ksys_mmap_pgoff+0x3af/0x500 [ 32.287541] do_syscall_64+0x3f/0x90 [ 32.288034] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.288708] RIP: 0033:0x7f90bbc2cd82 [ 32.289171] 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 [ 32.291332] RSP: 002b:00007fffc54868d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.292286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f90bbc2cd82 [ 32.293154] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f90bb066000 [ 32.294016] RBP: 00007f90bb066000 R08: 0000000000000009 R09: 0000000000001000 [ 32.294901] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ac5b61ec0 [ 32.295752] R13: 00007fffc54868f0 R14: 00007fffc5486920 R15: 00007fffc5486c80 [ 32.296610] </TASK> [ 32.296911] [ 32.297129] Allocated by task 213: [ 32.297563] kasan_save_stack+0x22/0x50 [ 32.298066] kasan_set_track+0x25/0x30 [ 32.298558] __kasan_slab_alloc+0x59/0x70 [ 32.299092] kmem_cache_alloc+0x16b/0x370 [ 32.299605] vm_area_dup+0x20/0x160 [ 32.300071] __split_vma+0x170/0x950 [ 32.300540] split_vma+0xc6/0x110 [ 32.301000] mprotect_fixup+0x8d2/0xb30 [ 32.301500] do_mprotect_pkey+0x87e/0xd40 [ 32.302026] __x64_sys_mprotect+0x78/0xc0 [ 32.302558] do_syscall_64+0x3f/0x90 [ 32.303052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.303692] [ 32.303910] Freed by task 213: [ 32.304308] kasan_save_stack+0x22/0x50 [ 32.304825] kasan_set_track+0x25/0x30 [ 32.305323] kasan_save_free_info+0x2b/0x50 [ 32.305855] __kasan_slab_free+0x10a/0x190 [ 32.306385] kmem_cache_free+0x10d/0x4d0 [ 32.306915] rcu_core+0x8c8/0x2860 [ 32.307364] __do_softirq+0x1b7/0x7d4 [ 32.307834] [ 32.308049] Last potentially related work creation: [ 32.308648] kasan_save_stack+0x22/0x50 [ 32.309154] __kasan_record_aux_stack+0x8e/0xa0 [ 32.309735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.310376] remove_vma+0x139/0x170 [ 32.310838] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.311392] do_vmi_munmap+0x1f1/0x2b0 [ 32.311881] __vm_munmap+0x138/0x3a0 [ 32.312355] __x64_sys_munmap+0x59/0x80 [ 32.312852] do_syscall_64+0x3f/0x90 [ 32.313328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.313976] [ 32.314195] The buggy address belongs to the object at ffff88800e88d000 [ 32.314195] which belongs to the cache vm_area_struct of size 168 [ 32.315676] The buggy address is located 88 bytes inside of [ 32.315676] freed 168-byte region [ffff88800e88d000, ffff88800e88d0a8) [ 32.317112] [ 32.317331] The buggy address belongs to the physical page: [ 32.317991] page:00000000001e939b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe88d [ 32.319106] memcg:ffff88800cb67a01 [ 32.319535] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.320234] page_type: 0xffffffff() [ 32.320691] raw: 0100000000000200 ffff8880087a0c80 ffffea0000396a80 dead000000000007 [ 32.321612] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb67a01 [ 32.322522] page dumped because: kasan: bad access detected [ 32.323200] [ 32.323420] Memory state around the buggy address: [ 32.324004] ffff88800e88cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.324868] ffff88800e88cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.325747] >ffff88800e88d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.326605] ^ [ 32.327353] ffff88800e88d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 32.328220] ffff88800e88d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.329082] ================================================================== [ 32.330066] Disabling lock debugging due to kernel taint [ 34.239399] BUG: Bad rss-counter state mm:00000000594dd8f6 type:MM_FILEPAGES val:33 [ 34.240717] BUG: Bad rss-counter state mm:00000000594dd8f6 type:MM_ANONPAGES val:22 [ 34.770234] BUG: Bad rss-counter state mm:00000000f0026d33 type:MM_FILEPAGES val:33 [ 34.771637] BUG: Bad rss-counter state mm:00000000f0026d33 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54143' (ECDSA) to the list of known hosts. 2023/06/21 01:52:06 fuzzer started 2023/06/21 01:52:06 dialing manager at localhost:36067 2023/06/21 01:52:06 checking machine... 2023/06/21 01:52:06 checking revisions... [ 35.379953] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:52:06 testing simple program... [ 35.433806] cgroup: Unknown subsys name 'net' [ 35.470782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:52:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=1ffff11001b4ff2e RSI=ffffffff8186c183 RDI=ffff88800da7f930 RBP=ffff88800da7f988 RSP=ffff88800da7f8c0 R8 =0000000000000001 R9 =ffff88800da7f970 R10=0000000000038001 R11=0000000000024253 R12=ffff88800da7f990 R13=ffff88800da7f978 R14=ffff88800da7f971 R15=ffff88800da7f930 RIP=ffffffff811306da 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 00007f5fc0582900 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=00007f5fc0b39618 CR3=0000000019e36000 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=563412feff00545000000000000080fe 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=00007fac215d29b0 CR3=000000000d8ba000 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=a161f034d9bfc284d84658f952118d69 XMM02=ec2efd57dc4c00df000000000011b1d8 XMM03=d8c73277b74ab2fb000000000011b2a8 XMM04=6d0038a4510d3e0d00000000000ae988 XMM05=cf9314547bf775f20000000000132f88 XMM06=4fda316b135da52b0000000000132028 XMM07=e042d86d42eb936e00000000001225d8 XMM08=d8c73277b74ab2fb000000000011b2a8 XMM09=00000000000000000000000000000000 XMM10=00002000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000