syzkaller login: [ 30.172556] BUG: Bad rss-counter state mm:000000006b0df0bb type:MM_FILEPAGES val:33 [ 30.173898] BUG: Bad rss-counter state mm:000000006b0df0bb type:MM_ANONPAGES val:22 [ 30.249965] ================================================================== [ 30.251042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.252158] Read of size 8 at addr ffff888019b925c8 by task sshd/219 [ 30.253284] [ 30.253538] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.254554] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.255662] Call Trace: [ 30.255981] [ 30.256268] dump_stack_lvl+0x91/0xf0 [ 30.256765] print_report+0xcc/0x620 [ 30.257247] ? __virt_addr_valid+0x102/0x340 [ 30.257800] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.258418] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.259030] kasan_report+0xbe/0xf0 [ 30.259508] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.260126] vma_interval_tree_remove+0xc75/0xec0 [ 30.260736] vma_prepare+0xc54/0x11a0 [ 30.261213] __split_vma+0x5af/0x950 [ 30.261683] ? __pfx___split_vma+0x10/0x10 [ 30.262207] ? find_held_lock+0x2c/0x110 [ 30.262732] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.263305] ? lock_is_held_type+0x9f/0x120 [ 30.263844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.264450] ? mtree_range_walk+0x632/0x900 [ 30.265031] ? mas_walk+0x5c7/0x7c0 [ 30.265513] do_vmi_munmap+0x1f1/0x2b0 [ 30.266002] mmap_region+0x1f9/0x2660 [ 30.266488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.267003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.267717] ? __pfx_lock_acquire+0x10/0x10 [ 30.268258] ? __pfx_mmap_region+0x10/0x10 [ 30.268806] ? security_mmap_addr+0x7d/0xa0 [ 30.269337] ? get_unmapped_area+0x1f5/0x3f0 [ 30.269891] do_mmap+0x854/0xf00 [ 30.270333] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.270833] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.271407] ksys_mmap_pgoff+0x3af/0x500 [ 30.271926] do_syscall_64+0x3f/0x90 [ 30.272402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273073] RIP: 0033:0x7f374c4ccd82 [ 30.273530] 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 [ 30.275674] RSP: 002b:00007ffea43f8428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.276587] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f374c4ccd82 [ 30.277489] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f374b906000 [ 30.278409] RBP: 00007f374b906000 R08: 0000000000000009 R09: 0000000000001000 [ 30.279265] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563a3d1dcf70 [ 30.280115] R13: 00007ffea43f8440 R14: 00007ffea43f8470 R15: 00007ffea43f87d0 [ 30.280998] [ 30.281294] [ 30.281507] Allocated by task 212: [ 30.281936] kasan_save_stack+0x22/0x50 [ 30.282439] kasan_set_track+0x25/0x30 [ 30.282936] __kasan_slab_alloc+0x59/0x70 [ 30.283459] kmem_cache_alloc+0x16b/0x370 [ 30.283970] vm_area_dup+0x20/0x160 [ 30.284428] __split_vma+0x170/0x950 [ 30.284904] split_vma+0xc6/0x110 [ 30.285355] mprotect_fixup+0x8d2/0xb30 [ 30.285859] do_mprotect_pkey+0x87e/0xd40 [ 30.286385] __x64_sys_mprotect+0x78/0xc0 [ 30.286917] do_syscall_64+0x3f/0x90 [ 30.287396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.288045] [ 30.288261] Freed by task 212: [ 30.288654] kasan_save_stack+0x22/0x50 [ 30.289154] kasan_set_track+0x25/0x30 [ 30.289648] kasan_save_free_info+0x2b/0x50 [ 30.290184] __kasan_slab_free+0x10a/0x190 [ 30.290728] kmem_cache_free+0x10d/0x4d0 [ 30.291239] rcu_core+0x8c8/0x2860 [ 30.291680] __do_softirq+0x1b7/0x7d4 [ 30.292160] [ 30.292373] Last potentially related work creation: [ 30.292973] kasan_save_stack+0x22/0x50 [ 30.293475] __kasan_record_aux_stack+0x8e/0xa0 [ 30.294050] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.294708] remove_vma+0x139/0x170 [ 30.295175] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.295732] do_vmi_munmap+0x1f1/0x2b0 [ 30.296215] __vm_munmap+0x138/0x3a0 [ 30.296703] __x64_sys_munmap+0x59/0x80 [ 30.297283] do_syscall_64+0x3f/0x90 [ 30.297761] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298410] [ 30.298625] The buggy address belongs to the object at ffff888019b92570 [ 30.298625] which belongs to the cache vm_area_struct of size 168 [ 30.300103] The buggy address is located 88 bytes inside of [ 30.300103] freed 168-byte region [ffff888019b92570, ffff888019b92618) [ 30.301547] [ 30.301761] The buggy address belongs to the physical page: [ 30.302429] page:00000000c880cc29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19b92 [ 30.303526] memcg:ffff888019b8a201 [ 30.303956] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.304610] page_type: 0xffffffff() [ 30.305068] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.305993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019b8a201 [ 30.306913] page dumped because: kasan: bad access detected [ 30.307578] [ 30.307809] Memory state around the buggy address: [ 30.308388] ffff888019b92480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.309246] ffff888019b92500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.310110] >ffff888019b92580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.310969] ^ [ 30.311647] ffff888019b92600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.312510] ffff888019b92680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.313380] ================================================================== [ 30.314289] Disabling lock debugging due to kernel taint [ 32.770763] BUG: Bad rss-counter state mm:000000003f9b3d65 type:MM_FILEPAGES val:33 [ 32.771948] BUG: Bad rss-counter state mm:000000003f9b3d65 type:MM_ANONPAGES val:22 [ 33.233045] BUG: Bad rss-counter state mm:00000000e19e9abd type:MM_FILEPAGES val:33 [ 33.234366] BUG: Bad rss-counter state mm:00000000e19e9abd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19592' (ECDSA) to the list of known hosts. 2023/06/21 02:51:27 fuzzer started 2023/06/21 02:51:27 dialing manager at localhost:36067 2023/06/21 02:51:27 checking machine... 2023/06/21 02:51:27 checking revisions... [ 33.870329] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:51:27 testing simple program... [ 33.915442] cgroup: Unknown subsys name 'net' [ 33.973666] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:27 Registers: info registers vcpu 0 RAX=1ffffffff0c286db RBX=0000000000000001 RCX=ffffffff861436da RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888016dc7998 RBP=ffff888016dc7988 RSP=ffff888016dc78c0 R8 =ffffffff861436de R9 =ffff888016dc7970 R10=0000000000038001 R11=00000000000229a3 R12=ffff888016dc7990 R13=ffff888016dc7978 R14=ffff888016dc7e58 R15=ffff888016dc7930 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007f75aa1c9900 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=00007f75aa780618 CR3=000000000dc38000 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=00007f3a6465afe0 CR3=0000000016bdc000 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=2036323a31353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a31353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000