[ 23.938356] BUG: Bad rss-counter state mm:000000009080d8fd type:MM_FILEPAGES val:33 [ 23.940741] BUG: Bad rss-counter state mm:000000009080d8fd type:MM_ANONPAGES val:22 [ 24.085757] ================================================================== [ 24.086647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.087691] Read of size 8 at addr ffff88800dfbf228 by task sshd/219 [ 24.088464] [ 24.088678] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.089559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.090532] Call Trace: [ 24.090853] [ 24.091136] dump_stack_lvl+0x91/0xf0 [ 24.091635] print_report+0xcc/0x620 [ 24.092145] ? __virt_addr_valid+0x102/0x340 [ 24.092690] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.093299] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.093914] kasan_report+0xbe/0xf0 [ 24.094385] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.095000] vma_interval_tree_remove+0xc75/0xec0 [ 24.095590] vma_prepare+0xc54/0x11a0 [ 24.096095] __split_vma+0x5af/0x950 [ 24.096579] ? __pfx___split_vma+0x10/0x10 [ 24.097122] ? find_held_lock+0x2c/0x110 [ 24.097660] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.098239] ? lock_is_held_type+0x9f/0x120 [ 24.098797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.099423] ? mtree_range_walk+0x632/0x900 [ 24.100015] ? mas_walk+0x5c7/0x7c0 [ 24.100500] do_vmi_munmap+0x1f1/0x2b0 [ 24.101005] mmap_region+0x1f9/0x2660 [ 24.101504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.102026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.102762] ? __pfx_lock_acquire+0x10/0x10 [ 24.103315] ? __pfx_mmap_region+0x10/0x10 [ 24.103881] ? security_mmap_addr+0x7d/0xa0 [ 24.104428] ? get_unmapped_area+0x1f5/0x3f0 [ 24.104995] do_mmap+0x854/0xf00 [ 24.105447] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.105956] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.106541] ksys_mmap_pgoff+0x3af/0x500 [ 24.107057] do_syscall_64+0x3f/0x90 [ 24.107556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.108237] RIP: 0033:0x7f54364d0d82 [ 24.108710] 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 [ 24.110922] RSP: 002b:00007ffe69259568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.111879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54364d0d82 [ 24.112748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f543590a000 [ 24.113615] RBP: 00007f543590a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.114484] R10: 0000000000000812 R11: 0000000000000206 R12: 000055962f16fec0 [ 24.115360] R13: 00007ffe69259580 R14: 00007ffe692595b0 R15: 00007ffe69259910 [ 24.116258] [ 24.116556] [ 24.116781] Allocated by task 212: [ 24.117227] kasan_save_stack+0x22/0x50 [ 24.117744] kasan_set_track+0x25/0x30 [ 24.118247] __kasan_slab_alloc+0x59/0x70 [ 24.118785] kmem_cache_alloc+0x16b/0x370 [ 24.119314] vm_area_dup+0x20/0x160 [ 24.119796] __split_vma+0x170/0x950 [ 24.120271] split_vma+0xc6/0x110 [ 24.120722] mprotect_fixup+0x8d2/0xb30 [ 24.121242] do_mprotect_pkey+0x87e/0xd40 [ 24.121783] __x64_sys_mprotect+0x78/0xc0 [ 24.122315] do_syscall_64+0x3f/0x90 [ 24.122806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.123472] [ 24.123693] Freed by task 212: [ 24.124117] kasan_save_stack+0x22/0x50 [ 24.124632] kasan_set_track+0x25/0x30 [ 24.125137] kasan_save_free_info+0x2b/0x50 [ 24.125683] __kasan_slab_free+0x10a/0x190 [ 24.126225] kmem_cache_free+0x10d/0x4d0 [ 24.126747] rcu_core+0x8c8/0x2860 [ 24.127198] __do_softirq+0x1b7/0x7d4 [ 24.127690] [ 24.127932] Last potentially related work creation: [ 24.128541] kasan_save_stack+0x22/0x50 [ 24.129057] __kasan_record_aux_stack+0x8e/0xa0 [ 24.129647] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.130297] remove_vma+0x139/0x170 [ 24.130757] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.131317] do_vmi_munmap+0x1f1/0x2b0 [ 24.131820] __vm_munmap+0x138/0x3a0 [ 24.132294] __x64_sys_munmap+0x59/0x80 [ 24.132804] do_syscall_64+0x3f/0x90 [ 24.133290] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.133942] [ 24.134161] The buggy address belongs to the object at ffff88800dfbf1d0 [ 24.134161] which belongs to the cache vm_area_struct of size 168 [ 24.135679] The buggy address is located 88 bytes inside of [ 24.135679] freed 168-byte region [ffff88800dfbf1d0, ffff88800dfbf278) [ 24.137146] [ 24.137368] The buggy address belongs to the physical page: [ 24.138051] page:0000000070cd1243 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfbf [ 24.139154] memcg:ffff88800d92f401 [ 24.139593] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.140321] page_type: 0xffffffff() [ 24.140783] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.141739] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d92f401 [ 24.142673] page dumped because: kasan: bad access detected [ 24.143358] [ 24.143577] Memory state around the buggy address: [ 24.144195] ffff88800dfbf100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.145083] ffff88800dfbf180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 24.145968] >ffff88800dfbf200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 24.146854] ^ [ 24.147425] ffff88800dfbf280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 24.148331] ffff88800dfbf300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 24.149202] ================================================================== [ 24.150203] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.032456] BUG: Bad rss-counter state mm:0000000033f19cf5 type:MM_FILEPAGES val:33 [ 26.034141] BUG: Bad rss-counter state mm:0000000033f19cf5 type:MM_ANONPAGES val:22 [ 26.518567] BUG: Bad rss-counter state mm:000000001def65e3 type:MM_FILEPAGES val:33 [ 26.519589] BUG: Bad rss-counter state mm:000000001def65e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11127' (ECDSA) to the list of known hosts. 2023/06/20 16:12:59 fuzzer started 2023/06/20 16:12:59 dialing manager at localhost:36067 2023/06/20 16:12:59 checking machine... 2023/06/20 16:12:59 checking revisions... [ 27.273509] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:12:59 testing simple program... [ 27.318164] cgroup: Unknown subsys name 'net' [ 27.364438] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe7ee5b718 CR3=0000000009628000 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=2038353a32313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a32313a3631203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff110030d8e8a RSP=ffff8880186c7430 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000087c0000087c R12=ffffffff8560b640 R13=ffffffff83ab1b1f R14=dffffc0000000000 R15=ffffffff87f97640 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f37701bc900 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=00007f3770773618 CR3=0000000016526000 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=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