[ 24.074905] BUG: Bad rss-counter state mm:00000000aa5dcc27 type:MM_FILEPAGES val:33 [ 24.076525] BUG: Bad rss-counter state mm:00000000aa5dcc27 type:MM_ANONPAGES val:22 [ 24.236583] ================================================================== [ 24.237654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.238781] Read of size 8 at addr ffff8880199c5a50 by task sshd/219 [ 24.239891] [ 24.240150] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.241169] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.242423] Call Trace: [ 24.242830] [ 24.243163] dump_stack_lvl+0x91/0xf0 [ 24.243743] print_report+0xcc/0x620 [ 24.244311] ? __virt_addr_valid+0x102/0x340 [ 24.244957] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.245691] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.246442] kasan_report+0xbe/0xf0 [ 24.247040] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.247797] vma_interval_tree_remove+0xc75/0xec0 [ 24.248503] vma_prepare+0xc54/0x11a0 [ 24.249064] __split_vma+0x5af/0x950 [ 24.249631] ? __pfx___split_vma+0x10/0x10 [ 24.250268] ? find_held_lock+0x2c/0x110 [ 24.250933] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.251603] ? lock_is_held_type+0x9f/0x120 [ 24.252114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.252684] ? mtree_range_walk+0x632/0x900 [ 24.253207] ? mas_walk+0x5c7/0x7c0 [ 24.253662] do_vmi_munmap+0x1f1/0x2b0 [ 24.254130] mmap_region+0x1f9/0x2660 [ 24.254584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.255074] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.255742] ? __pfx_lock_acquire+0x10/0x10 [ 24.256243] ? __pfx_mmap_region+0x10/0x10 [ 24.256744] ? security_mmap_addr+0x7d/0xa0 [ 24.257268] ? get_unmapped_area+0x1f5/0x3f0 [ 24.257820] do_mmap+0x854/0xf00 [ 24.258252] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.258733] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.259304] ksys_mmap_pgoff+0x3af/0x500 [ 24.259814] do_syscall_64+0x3f/0x90 [ 24.260293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.260926] RIP: 0033:0x7fac6f7e5d82 [ 24.261384] 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 [ 24.263494] RSP: 002b:00007ffd2d95f868 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.264402] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fac6f7e5d82 [ 24.265239] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fac6ec1f000 [ 24.266070] RBP: 00007fac6ec1f000 R08: 0000000000000009 R09: 0000000000001000 [ 24.266935] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fb58b0f70 [ 24.267770] R13: 00007ffd2d95f880 R14: 00007ffd2d95f8b0 R15: 00007ffd2d95fc10 [ 24.268615] [ 24.268903] [ 24.269112] Allocated by task 208: [ 24.269532] kasan_save_stack+0x22/0x50 [ 24.270031] kasan_set_track+0x25/0x30 [ 24.270511] __kasan_slab_alloc+0x59/0x70 [ 24.271049] kmem_cache_alloc+0x16b/0x370 [ 24.271546] vm_area_dup+0x20/0x160 [ 24.271995] __split_vma+0x170/0x950 [ 24.272451] split_vma+0xc6/0x110 [ 24.272886] mprotect_fixup+0x8d2/0xb30 [ 24.273366] do_mprotect_pkey+0x87e/0xd40 [ 24.273890] __x64_sys_mprotect+0x78/0xc0 [ 24.274408] do_syscall_64+0x3f/0x90 [ 24.274893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.275528] [ 24.275735] Freed by task 208: [ 24.276126] kasan_save_stack+0x22/0x50 [ 24.276624] kasan_set_track+0x25/0x30 [ 24.277100] kasan_save_free_info+0x2b/0x50 [ 24.277620] __kasan_slab_free+0x10a/0x190 [ 24.278141] kmem_cache_free+0x10d/0x4d0 [ 24.278638] rcu_core+0x8c8/0x2860 [ 24.279084] __do_softirq+0x1b7/0x7d4 [ 24.279565] [ 24.279782] Last potentially related work creation: [ 24.280471] kasan_save_stack+0x22/0x50 [ 24.280961] __kasan_record_aux_stack+0x8e/0xa0 [ 24.281518] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.282140] remove_vma+0x139/0x170 [ 24.282577] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.283152] do_vmi_munmap+0x1f1/0x2b0 [ 24.283630] __vm_munmap+0x138/0x3a0 [ 24.284088] __x64_sys_munmap+0x59/0x80 [ 24.284573] do_syscall_64+0x3f/0x90 [ 24.285048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.285681] [ 24.285897] The buggy address belongs to the object at ffff8880199c59f8 [ 24.285897] which belongs to the cache vm_area_struct of size 168 [ 24.287365] The buggy address is located 88 bytes inside of [ 24.287365] freed 168-byte region [ffff8880199c59f8, ffff8880199c5aa0) [ 24.288766] [ 24.288980] The buggy address belongs to the physical page: [ 24.289630] page:000000009161ce7b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x199c5 [ 24.290709] memcg:ffff88800d7d4601 [ 24.291161] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.291794] page_type: 0xffffffff() [ 24.292236] raw: 0100000000000200 ffff8880087a0c80 ffffea000035f440 0000000000000008 [ 24.293140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7d4601 [ 24.294046] page dumped because: kasan: bad access detected [ 24.294695] [ 24.294913] Memory state around the buggy address: [ 24.295489] ffff8880199c5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.296361] ffff8880199c5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.297208] >ffff8880199c5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.298061] ^ [ 24.298751] ffff8880199c5a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.299574] ffff8880199c5b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.300379] ================================================================== [ 24.301258] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.094846] BUG: Bad rss-counter state mm:0000000090084844 type:MM_FILEPAGES val:33 [ 26.095534] BUG: Bad rss-counter state mm:0000000090084844 type:MM_ANONPAGES val:22 [ 26.592106] BUG: Bad rss-counter state mm:0000000005381dfb type:MM_FILEPAGES val:33 [ 26.593279] BUG: Bad rss-counter state mm:0000000005381dfb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8976' (ECDSA) to the list of known hosts. 2023/06/20 15:46:48 fuzzer started 2023/06/20 15:46:49 dialing manager at localhost:36067 2023/06/20 15:46:49 checking machine... 2023/06/20 15:46:49 checking revisions... [ 27.346270] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:46:49 testing simple program... [ 27.402322] cgroup: Unknown subsys name 'net' [ 27.465934] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:46:48 Registers: info registers vcpu 0 RAX=ffffffff813ad720 RBX=0000000000000002 RCX=0000000000000002 RDX=ffff88806ce09b01 RSI=ffff88806ce09b38 RDI=ffff88806ce09b38 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff8608a55a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09b40 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 00007f6e29515900 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=00007f6e29acc618 CR3=000000000e1ac000 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=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=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=00007f425afec880 CR3=000000001983e000 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=2038343a36343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a36343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000