syzkaller login: [ 30.180489] BUG: Bad rss-counter state mm:00000000befe935b type:MM_FILEPAGES val:33 [ 30.181906] BUG: Bad rss-counter state mm:00000000befe935b type:MM_ANONPAGES val:22 [ 30.350459] ================================================================== [ 30.351353] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.352229] Read of size 8 at addr ffff888019756968 by task sshd/221 [ 30.353090] [ 30.353301] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.354113] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.355024] Call Trace: [ 30.355328] <TASK> [ 30.355601] dump_stack_lvl+0x91/0xf0 [ 30.356071] print_report+0xcc/0x620 [ 30.356532] ? __virt_addr_valid+0x102/0x340 [ 30.357089] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.357668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.358254] kasan_report+0xbe/0xf0 [ 30.358703] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.359298] vma_interval_tree_remove+0xc75/0xec0 [ 30.359876] vma_prepare+0xc54/0x11a0 [ 30.360332] __split_vma+0x5af/0x950 [ 30.360788] ? __pfx___split_vma+0x10/0x10 [ 30.361288] ? find_held_lock+0x2c/0x110 [ 30.361780] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.362348] ? lock_is_held_type+0x9f/0x120 [ 30.362888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.363494] ? mtree_range_walk+0x632/0x900 [ 30.364047] ? mas_walk+0x5c7/0x7c0 [ 30.364516] do_vmi_munmap+0x1f1/0x2b0 [ 30.365012] mmap_region+0x1f9/0x2660 [ 30.365491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.365998] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.366712] ? __pfx_lock_acquire+0x10/0x10 [ 30.367247] ? __pfx_mmap_region+0x10/0x10 [ 30.367781] ? security_mmap_addr+0x7d/0xa0 [ 30.368315] ? get_unmapped_area+0x1f5/0x3f0 [ 30.368885] do_mmap+0x854/0xf00 [ 30.369325] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.369824] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.370380] ksys_mmap_pgoff+0x3af/0x500 [ 30.370882] do_syscall_64+0x3f/0x90 [ 30.371364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.372008] RIP: 0033:0x7f7b11d15d82 [ 30.372463] 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 [ 30.374631] RSP: 002b:00007ffdef08c218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.375538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b11d15d82 [ 30.376392] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b1114f000 [ 30.377268] RBP: 00007f7b1114f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.378114] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641c4d4bf70 [ 30.378964] R13: 00007ffdef08c230 R14: 00007ffdef08c260 R15: 00007ffdef08c5c0 [ 30.379822] </TASK> [ 30.380117] [ 30.380332] Allocated by task 214: [ 30.380769] kasan_save_stack+0x22/0x50 [ 30.381279] kasan_set_track+0x25/0x30 [ 30.381759] __kasan_slab_alloc+0x59/0x70 [ 30.382276] kmem_cache_alloc+0x16b/0x370 [ 30.382792] vm_area_dup+0x20/0x160 [ 30.383240] __split_vma+0x170/0x950 [ 30.383712] split_vma+0xc6/0x110 [ 30.384141] mprotect_fixup+0x8d2/0xb30 [ 30.384644] do_mprotect_pkey+0x87e/0xd40 [ 30.385161] __x64_sys_mprotect+0x78/0xc0 [ 30.385676] do_syscall_64+0x3f/0x90 [ 30.386149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386794] [ 30.387011] Freed by task 204: [ 30.387410] kasan_save_stack+0x22/0x50 [ 30.387911] kasan_set_track+0x25/0x30 [ 30.388389] kasan_save_free_info+0x2b/0x50 [ 30.388933] __kasan_slab_free+0x10a/0x190 [ 30.389462] kmem_cache_free+0x10d/0x4d0 [ 30.389968] rcu_core+0x8c8/0x2860 [ 30.390405] __do_softirq+0x1b7/0x7d4 [ 30.390888] [ 30.391107] Last potentially related work creation: [ 30.391690] kasan_save_stack+0x22/0x50 [ 30.392185] __kasan_record_aux_stack+0x8e/0xa0 [ 30.392757] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.393400] remove_vma+0x139/0x170 [ 30.393850] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.394454] do_vmi_munmap+0x1f1/0x2b0 [ 30.394943] __vm_munmap+0x138/0x3a0 [ 30.395397] __x64_sys_munmap+0x59/0x80 [ 30.395892] do_syscall_64+0x3f/0x90 [ 30.396368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.397220] [ 30.397489] Second to last potentially related work creation: [ 30.398316] kasan_save_stack+0x22/0x50 [ 30.398926] __kasan_record_aux_stack+0x8e/0xa0 [ 30.399613] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.400395] remove_vma+0x139/0x170 [ 30.400979] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.401647] do_vmi_munmap+0x1f1/0x2b0 [ 30.402239] mmap_region+0x1f9/0x2660 [ 30.402808] do_mmap+0x854/0xf00 [ 30.403323] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.403915] ksys_mmap_pgoff+0x3af/0x500 [ 30.404518] do_syscall_64+0x3f/0x90 [ 30.405101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.405883] [ 30.406139] The buggy address belongs to the object at ffff888019756910 [ 30.406139] which belongs to the cache vm_area_struct of size 168 [ 30.407920] The buggy address is located 88 bytes inside of [ 30.407920] freed 168-byte region [ffff888019756910, ffff8880197569b8) [ 30.409631] [ 30.409894] The buggy address belongs to the physical page: [ 30.410689] page:0000000077eb26d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19756 [ 30.411996] memcg:ffff88801974b601 [ 30.412504] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.413230] page_type: 0xffffffff() [ 30.413673] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.414584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801974b601 [ 30.415472] page dumped because: kasan: bad access detected [ 30.416125] [ 30.416339] Memory state around the buggy address: [ 30.416922] ffff888019756800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.417762] ffff888019756880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.418611] >ffff888019756900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.419446] ^ [ 30.420212] ffff888019756980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.421062] ffff888019756a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.421897] ================================================================== [ 30.422834] Disabling lock debugging due to kernel taint [ 32.583876] BUG: Bad rss-counter state mm:0000000041fba5fa type:MM_FILEPAGES val:33 [ 32.584889] BUG: Bad rss-counter state mm:0000000041fba5fa type:MM_ANONPAGES val:22 [ 33.043101] BUG: Bad rss-counter state mm:0000000082e3024d type:MM_FILEPAGES val:33 [ 33.044108] BUG: Bad rss-counter state mm:0000000082e3024d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10942' (ECDSA) to the list of known hosts. 2023/06/20 21:04:47 fuzzer started 2023/06/20 21:04:47 dialing manager at localhost:36067 2023/06/20 21:04:47 checking machine... 2023/06/20 21:04:47 checking revisions... [ 33.751388] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:04:47 testing simple program... [ 33.807103] cgroup: Unknown subsys name 'net' [ 33.844228] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:04:47 Registers: info registers vcpu 0 RAX=ffff888016bc8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016bc7a01 RSI=ffff888016bc7af0 RDI=ffff888016bc7af0 RBP=ffff888016bc7600 RSP=ffff888016bc7530 R8 =0000000000000001 R9 =ffff888016bc75e8 R10=0000000000038001 R11=0000000000091af2 R12=ffff888016bc7608 R13=ffff888016bc75f0 R14=ffff888016bc7af0 R15=ffff888016bc75a8 RIP=ffffffff8112fbf0 RFL=00000202 [-------] 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 00007f6cae252900 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=00007ffe4ac69000 CR3=000000000c54a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffff888008c04400 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=00007fb63b85b000 CR3=000000000e048000 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=2036343a34303a3132203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a34303a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000