[ 32.518895] BUG: Bad rss-counter state mm:000000005b3fa3cd type:MM_FILEPAGES val:33 [ 32.519627] BUG: Bad rss-counter state mm:000000005b3fa3cd type:MM_ANONPAGES val:22 [ 32.657129] ================================================================== [ 32.657804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.658424] Read of size 8 at addr ffff88800c9df968 by task sshd/220 [ 32.658929] [ 32.659079] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.659735] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.660404] Call Trace: [ 32.660652] [ 32.660851] dump_stack_lvl+0x91/0xf0 [ 32.661194] print_report+0xcc/0x620 [ 32.661883] ? __virt_addr_valid+0x102/0x340 [ 32.662263] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.662681] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.663107] kasan_report+0xbe/0xf0 [ 32.663431] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.663864] vma_interval_tree_remove+0xc75/0xec0 [ 32.664273] vma_prepare+0xc54/0x11a0 [ 32.664643] __split_vma+0x5af/0x950 [ 32.664964] ? __pfx___split_vma+0x10/0x10 [ 32.665325] ? find_held_lock+0x2c/0x110 [ 32.665687] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.666067] ? lock_is_held_type+0x9f/0x120 [ 32.666435] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.666851] ? mtree_range_walk+0x632/0x900 [ 32.667230] ? mas_walk+0x5c7/0x7c0 [ 32.667557] do_vmi_munmap+0x1f1/0x2b0 [ 32.667924] mmap_region+0x1f9/0x2660 [ 32.668253] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.668600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.669076] ? __pfx_lock_acquire+0x10/0x10 [ 32.669441] ? __pfx_mmap_region+0x10/0x10 [ 32.669807] ? security_mmap_addr+0x7d/0xa0 [ 32.670167] ? get_unmapped_area+0x1f5/0x3f0 [ 32.670555] do_mmap+0x854/0xf00 [ 32.670859] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.671199] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.671588] ksys_mmap_pgoff+0x3af/0x500 [ 32.671973] do_syscall_64+0x3f/0x90 [ 32.672303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.672747] RIP: 0033:0x7f423e15dd82 [ 32.673056] 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 [ 32.674500] RSP: 002b:00007ffd0a136118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.675152] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f423e15dd82 [ 32.675749] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f423d597000 [ 32.676320] RBP: 00007f423d597000 R08: 0000000000000009 R09: 0000000000001000 [ 32.676897] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586205ceb20 [ 32.677477] R13: 00007ffd0a136130 R14: 00007ffd0a136160 R15: 00007ffd0a1364c0 [ 32.678064] [ 32.678265] [ 32.678417] Allocated by task 213: [ 32.678711] kasan_save_stack+0x22/0x50 [ 32.679057] kasan_set_track+0x25/0x30 [ 32.679392] __kasan_slab_alloc+0x59/0x70 [ 32.679776] kmem_cache_alloc+0x16b/0x370 [ 32.680119] vm_area_dup+0x20/0x160 [ 32.680432] __split_vma+0x170/0x950 [ 32.680754] split_vma+0xc6/0x110 [ 32.681057] mprotect_fixup+0x8d2/0xb30 [ 32.681404] do_mprotect_pkey+0x87e/0xd40 [ 32.681764] __x64_sys_mprotect+0x78/0xc0 [ 32.682123] do_syscall_64+0x3f/0x90 [ 32.682449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.682890] [ 32.683033] Freed by task 213: [ 32.683299] kasan_save_stack+0x22/0x50 [ 32.683646] kasan_set_track+0x25/0x30 [ 32.684021] kasan_save_free_info+0x2b/0x50 [ 32.684385] __kasan_slab_free+0x10a/0x190 [ 32.684752] kmem_cache_free+0x10d/0x4d0 [ 32.685103] rcu_core+0x8c8/0x2860 [ 32.685411] __do_softirq+0x1b7/0x7d4 [ 32.685737] [ 32.685887] Last potentially related work creation: [ 32.686281] kasan_save_stack+0x22/0x50 [ 32.686621] __kasan_record_aux_stack+0x8e/0xa0 [ 32.687017] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.687461] remove_vma+0x139/0x170 [ 32.687793] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.688175] do_vmi_munmap+0x1f1/0x2b0 [ 32.688508] __vm_munmap+0x138/0x3a0 [ 32.688827] __x64_sys_munmap+0x59/0x80 [ 32.689170] do_syscall_64+0x3f/0x90 [ 32.689494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.689926] [ 32.690078] Second to last potentially related work creation: [ 32.690543] kasan_save_stack+0x22/0x50 [ 32.690883] __kasan_record_aux_stack+0x8e/0xa0 [ 32.691274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.691728] remove_vma+0x139/0x170 [ 32.692033] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.692408] do_vmi_munmap+0x1f1/0x2b0 [ 32.692735] mmap_region+0x1f9/0x2660 [ 32.693065] do_mmap+0x854/0xf00 [ 32.693359] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.693692] ksys_mmap_pgoff+0x3af/0x500 [ 32.694030] do_syscall_64+0x3f/0x90 [ 32.694358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.694796] [ 32.694948] The buggy address belongs to the object at ffff88800c9df910 [ 32.694948] which belongs to the cache vm_area_struct of size 168 [ 32.695960] The buggy address is located 88 bytes inside of [ 32.695960] freed 168-byte region [ffff88800c9df910, ffff88800c9df9b8) [ 32.696908] [ 32.697055] The buggy address belongs to the physical page: [ 32.697505] page:000000004059fd07 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9df [ 32.698225] memcg:ffff88800c508001 [ 32.698519] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.698994] page_type: 0xffffffff() [ 32.699303] raw: 0100000000000200 ffff88800879fc80 ffffea0000327680 dead000000000005 [ 32.699939] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c508001 [ 32.700539] page dumped because: kasan: bad access detected [ 32.700981] [ 32.701129] Memory state around the buggy address: [ 32.701518] ffff88800c9df800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.702092] ffff88800c9df880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.702675] >ffff88800c9df900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.703333] ^ [ 32.703892] ffff88800c9df980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.704468] ffff88800c9dfa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.705050] ================================================================== [ 32.705719] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.144076] BUG: Bad rss-counter state mm:000000008ec1f0db type:MM_FILEPAGES val:33 [ 34.145396] BUG: Bad rss-counter state mm:000000008ec1f0db type:MM_ANONPAGES val:22 [ 34.494641] BUG: Bad rss-counter state mm:000000001f59b7cd type:MM_FILEPAGES val:33 [ 34.495341] BUG: Bad rss-counter state mm:000000001f59b7cd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6784' (ECDSA) to the list of known hosts. 2023/06/20 09:08:07 fuzzer started 2023/06/20 09:08:07 dialing manager at localhost:44161 2023/06/20 09:08:07 checking machine... 2023/06/20 09:08:07 checking revisions... [ 35.057440] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:08:07 testing simple program... [ 35.101736] cgroup: Unknown subsys name 'net' [ 35.137580] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:08:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002c6de85 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88801636f418 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000bdd00000bdd R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007f1637662900 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=00007f1637c19618 CR3=00000000159d6000 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=ffffffff81288f48 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff81288f48 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff888019dcc410 RIP=ffffffff813ad424 RFL=00000286 [--S--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 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=00007f521bd7e900 CR3=00000000198b6000 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=2036303a38303a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a38303a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000