[ 31.020973] BUG: Bad rss-counter state mm:000000000c59e15d type:MM_FILEPAGES val:32 [ 31.022146] BUG: Bad rss-counter state mm:000000000c59e15d type:MM_ANONPAGES val:22 [ 31.061187] ================================================================== [ 31.062200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.063159] Read of size 8 at addr ffff88800dcab3f8 by task sshd/218 [ 31.064209] [ 31.064426] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.065285] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.066272] Call Trace: [ 31.066590] [ 31.066868] dump_stack_lvl+0x91/0xf0 [ 31.067383] print_report+0xcc/0x620 [ 31.067870] ? __virt_addr_valid+0x102/0x340 [ 31.068415] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069034] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.069644] kasan_report+0xbe/0xf0 [ 31.070121] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.070742] vma_interval_tree_remove+0xc75/0xec0 [ 31.071364] vma_prepare+0xc54/0x11a0 [ 31.071839] __split_vma+0x5af/0x950 [ 31.072331] ? __pfx___split_vma+0x10/0x10 [ 31.072859] ? find_held_lock+0x2c/0x110 [ 31.073375] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.073937] ? lock_is_held_type+0x9f/0x120 [ 31.074471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.075071] ? mtree_range_walk+0x632/0x900 [ 31.075643] ? mas_walk+0x5c7/0x7c0 [ 31.076115] do_vmi_munmap+0x1f1/0x2b0 [ 31.076606] mmap_region+0x1f9/0x2660 [ 31.077087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.077594] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.078308] ? __pfx_lock_acquire+0x10/0x10 [ 31.078839] ? __pfx_mmap_region+0x10/0x10 [ 31.079382] ? security_mmap_addr+0x7d/0xa0 [ 31.079914] ? get_unmapped_area+0x1f5/0x3f0 [ 31.080458] do_mmap+0x854/0xf00 [ 31.080895] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.081388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.081958] ksys_mmap_pgoff+0x3af/0x500 [ 31.082465] do_syscall_64+0x3f/0x90 [ 31.082949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.083597] RIP: 0033:0x7f7f879b8d82 [ 31.084049] 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 [ 31.086154] RSP: 002b:00007ffd58931948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.087053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f879b8d82 [ 31.087909] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f86df2000 [ 31.088754] RBP: 00007f7f86df2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.089595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556cfdd35ec0 [ 31.090426] R13: 00007ffd58931960 R14: 00007ffd58931990 R15: 00007ffd58931cf0 [ 31.091274] [ 31.091575] [ 31.091791] Allocated by task 211: [ 31.092216] kasan_save_stack+0x22/0x50 [ 31.092715] kasan_set_track+0x25/0x30 [ 31.093205] __kasan_slab_alloc+0x59/0x70 [ 31.093725] kmem_cache_alloc+0x16b/0x370 [ 31.094236] vm_area_dup+0x20/0x160 [ 31.094691] __split_vma+0x170/0x950 [ 31.095156] split_vma+0xc6/0x110 [ 31.095603] mprotect_fixup+0x8d2/0xb30 [ 31.096104] do_mprotect_pkey+0x87e/0xd40 [ 31.096619] __x64_sys_mprotect+0x78/0xc0 [ 31.097148] do_syscall_64+0x3f/0x90 [ 31.097628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.098270] [ 31.098483] Freed by task 211: [ 31.098873] kasan_save_stack+0x22/0x50 [ 31.099396] kasan_set_track+0x25/0x30 [ 31.099890] kasan_save_free_info+0x2b/0x50 [ 31.100419] __kasan_slab_free+0x10a/0x190 [ 31.100949] kmem_cache_free+0x10d/0x4d0 [ 31.101453] rcu_core+0x8c8/0x2860 [ 31.101893] __do_softirq+0x1b7/0x7d4 [ 31.102368] [ 31.102583] Last potentially related work creation: [ 31.103165] kasan_save_stack+0x22/0x50 [ 31.103676] __kasan_record_aux_stack+0x8e/0xa0 [ 31.104247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.104883] remove_vma+0x139/0x170 [ 31.105337] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.105981] do_vmi_munmap+0x1f1/0x2b0 [ 31.106476] __vm_munmap+0x138/0x3a0 [ 31.106951] __x64_sys_munmap+0x59/0x80 [ 31.107458] do_syscall_64+0x3f/0x90 [ 31.107944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.108588] [ 31.108806] The buggy address belongs to the object at ffff88800dcab3a0 [ 31.108806] which belongs to the cache vm_area_struct of size 168 [ 31.110274] The buggy address is located 88 bytes inside of [ 31.110274] freed 168-byte region [ffff88800dcab3a0, ffff88800dcab448) [ 31.111683] [ 31.111901] The buggy address belongs to the physical page: [ 31.112566] page:00000000d4ed1c2e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcab [ 31.113656] memcg:ffff8880167dec01 [ 31.114076] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.114779] page_type: 0xffffffff() [ 31.115221] raw: 0100000000000200 ffff8880087a0c80 ffffea000036d680 0000000000000005 [ 31.116146] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880167dec01 [ 31.117038] page dumped because: kasan: bad access detected [ 31.117694] [ 31.117908] Memory state around the buggy address: [ 31.118483] ffff88800dcab280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.119331] ffff88800dcab300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.120187] >ffff88800dcab380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.121046] ^ [ 31.121878] ffff88800dcab400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.122735] ffff88800dcab480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.123597] ================================================================== [ 31.124556] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.210365] BUG: Bad rss-counter state mm:00000000ef9cd8c5 type:MM_FILEPAGES val:33 [ 33.211704] BUG: Bad rss-counter state mm:00000000ef9cd8c5 type:MM_ANONPAGES val:22 [ 33.590805] BUG: Bad rss-counter state mm:00000000a56b5b2a type:MM_FILEPAGES val:33 [ 33.591942] BUG: Bad rss-counter state mm:00000000a56b5b2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8716' (ECDSA) to the list of known hosts. 2023/06/21 05:34:33 fuzzer started 2023/06/21 05:34:33 dialing manager at localhost:36067 2023/06/21 05:34:33 checking machine... 2023/06/21 05:34:33 checking revisions... [ 34.309923] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:34:33 testing simple program... [ 34.348079] cgroup: Unknown subsys name 'net' [ 34.404330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:34:33 Registers: info registers vcpu 0 RAX=1ffffffff0c271ea RBX=0000000000000001 RCX=ffffffff86138f52 RDX=dffffc0000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88801681f510 RSP=ffff88801681f448 R8 =ffffffff86138f56 R9 =ffff88801681f4f8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88801681f518 R13=ffff88801681f500 R14=ffff88801681f828 R15=ffff88801681f4b8 RIP=ffffffff81130b73 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 00007fbbb57ea700 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=00007fcf40a1c0b0 CR3=00000000165f8000 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=2032333a34333a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34333a3530203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000001000 RBX=ffff88800e6b4780 RCX=0000000000000000 RDX=ffff88800f911b40 RSI=ffffffff81862a0f RDI=0000000000000000 RBP=ffff88800e6b4780 RSP=ffff888019767ea8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=7962206d65687420 R12=1ffff110032ecfd5 R13=0000559d8f19f4b0 R14=ffff88800e6b4870 R15=0000000000001000 RIP=ffffffff81864f34 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fcf40464900 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=00007ffcf1cea000 CR3=000000000e57c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000