Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.701329] BUG: Bad rss-counter state mm:00000000ee614d74 type:MM_FILEPAGES val:33 [ 31.702579] BUG: Bad rss-counter state mm:00000000ee614d74 type:MM_ANONPAGES val:22 [ 31.739775] ================================================================== [ 31.740715] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.741666] Read of size 8 at addr ffff88800e751880 by task sshd/219 [ 31.742477] [ 31.742712] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.743617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.744691] Call Trace: [ 31.745012] [ 31.745320] dump_stack_lvl+0x91/0xf0 [ 31.745817] print_report+0xcc/0x620 [ 31.746275] ? __virt_addr_valid+0x102/0x340 [ 31.746875] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747502] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748229] kasan_report+0xbe/0xf0 [ 31.748761] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.749400] vma_interval_tree_remove+0xc75/0xec0 [ 31.750013] vma_prepare+0xc54/0x11a0 [ 31.750463] __split_vma+0x5af/0x950 [ 31.751127] ? __pfx___split_vma+0x10/0x10 [ 31.751627] ? find_held_lock+0x2c/0x110 [ 31.752145] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.752676] ? lock_is_held_type+0x9f/0x120 [ 31.753184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.753788] ? mtree_range_walk+0x632/0x900 [ 31.754321] ? mas_walk+0x5c7/0x7c0 [ 31.754808] do_vmi_munmap+0x1f1/0x2b0 [ 31.755460] mmap_region+0x1f9/0x2660 [ 31.755961] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.756454] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.757122] ? __pfx_lock_acquire+0x10/0x10 [ 31.757804] ? __pfx_mmap_region+0x10/0x10 [ 31.758435] ? security_mmap_addr+0x7d/0xa0 [ 31.759004] ? get_unmapped_area+0x1f5/0x3f0 [ 31.759534] do_mmap+0x854/0xf00 [ 31.760006] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.760497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.761072] ksys_mmap_pgoff+0x3af/0x500 [ 31.761558] do_syscall_64+0x3f/0x90 [ 31.762088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.762809] RIP: 0033:0x7f8cadcd6d82 [ 31.763255] 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 [ 31.765389] RSP: 002b:00007ffc42aa4a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.766257] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cadcd6d82 [ 31.767110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cad110000 [ 31.767999] RBP: 00007f8cad110000 R08: 0000000000000009 R09: 0000000000001000 [ 31.768831] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ddc5851ec0 [ 31.769644] R13: 00007ffc42aa4a40 R14: 00007ffc42aa4a70 R15: 00007ffc42aa4dd0 [ 31.770504] [ 31.770817] [ 31.771062] Allocated by task 212: [ 31.771477] kasan_save_stack+0x22/0x50 [ 31.771957] kasan_set_track+0x25/0x30 [ 31.772447] __kasan_slab_alloc+0x59/0x70 [ 31.772998] kmem_cache_alloc+0x16b/0x370 [ 31.773501] vm_area_dup+0x20/0x160 [ 31.773992] __split_vma+0x170/0x950 [ 31.774457] split_vma+0xc6/0x110 [ 31.774885] mprotect_fixup+0x8d2/0xb30 [ 31.775368] do_mprotect_pkey+0x87e/0xd40 [ 31.775914] __x64_sys_mprotect+0x78/0xc0 [ 31.776440] do_syscall_64+0x3f/0x90 [ 31.776947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.777580] [ 31.777787] Freed by task 212: [ 31.778159] kasan_save_stack+0x22/0x50 [ 31.778645] kasan_set_track+0x25/0x30 [ 31.779126] kasan_save_free_info+0x2b/0x50 [ 31.779640] __kasan_slab_free+0x10a/0x190 [ 31.780162] kmem_cache_free+0x10d/0x4d0 [ 31.780684] rcu_core+0x8c8/0x2860 [ 31.781119] __do_softirq+0x1b7/0x7d4 [ 31.781584] [ 31.781792] Last potentially related work creation: [ 31.782361] kasan_save_stack+0x22/0x50 [ 31.782850] __kasan_record_aux_stack+0x8e/0xa0 [ 31.783399] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.784027] remove_vma+0x139/0x170 [ 31.784491] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.785098] do_vmi_munmap+0x1f1/0x2b0 [ 31.785568] __vm_munmap+0x138/0x3a0 [ 31.786029] __x64_sys_munmap+0x59/0x80 [ 31.786513] do_syscall_64+0x3f/0x90 [ 31.787012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.787632] [ 31.787855] The buggy address belongs to the object at ffff88800e751828 [ 31.787855] which belongs to the cache vm_area_struct of size 168 [ 31.789294] The buggy address is located 88 bytes inside of [ 31.789294] freed 168-byte region [ffff88800e751828, ffff88800e7518d0) [ 31.790710] [ 31.790958] The buggy address belongs to the physical page: [ 31.791614] page:00000000e70d8823 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe751 [ 31.792667] memcg:ffff88800e8e4801 [ 31.793084] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.793757] page_type: 0xffffffff() [ 31.794211] raw: 0100000000000200 ffff88800879fc80 ffffea0000355380 dead000000000003 [ 31.795147] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e4801 [ 31.795994] page dumped because: kasan: bad access detected [ 31.796635] [ 31.796840] Memory state around the buggy address: [ 31.797384] ffff88800e751780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.798226] ffff88800e751800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.799101] >ffff88800e751880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.799900] ^ [ 31.800296] ffff88800e751900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.801114] ffff88800e751980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.801915] ================================================================== [ 31.802891] Disabling lock debugging due to kernel taint [ 34.668628] BUG: Bad rss-counter state mm:00000000d7a07f5f type:MM_FILEPAGES val:33 [ 34.669772] BUG: Bad rss-counter state mm:00000000d7a07f5f type:MM_ANONPAGES val:22 [ 35.096693] BUG: Bad rss-counter state mm:000000002dfd4d9f type:MM_FILEPAGES val:33 [ 35.097751] BUG: Bad rss-counter state mm:000000002dfd4d9f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46445' (ECDSA) to the list of known hosts. 2023/06/20 01:13:12 fuzzer started 2023/06/20 01:13:12 dialing manager at localhost:44161 2023/06/20 01:13:12 checking machine... 2023/06/20 01:13:12 checking revisions... [ 35.751872] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:13:12 testing simple program... [ 35.791813] cgroup: Unknown subsys name 'net' [ 35.841981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:13:10 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff83c13a0b RDX=000000000002c13a RSI=000000000002c13a RDI=ffffffff865980a8 RBP=ffff8880145e7460 RSP=ffff8880145e7398 R8 =0000000000000000 R9 =ffff8880145e7448 R10=0000000000038001 R11=0000000000038891 R12=ffff8880145e7468 R13=ffff8880145e7450 R14=ffff8880145e7449 R15=ffff8880145e7408 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007fb5292a9700 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=00007f55584dc040 CR3=0000000006b08000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34383638352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343836 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=0000000080000000 RBX=0000000000000255 RCX=ffffffff8113b99c RDX=ffff88800e143680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888018f7ff58 RSP=ffff888018f7fed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007f9c8ec79008 R14=0000000000000000 R15=ffff88800845d340 RIP=ffffffff814c01e1 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 00007f9c8ecc0900 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=00007f9c8ec79008 CR3=00000000094f2000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000