[ 30.188480] BUG: Bad rss-counter state mm:00000000486d1ca1 type:MM_FILEPAGES val:33 [ 30.189742] BUG: Bad rss-counter state mm:00000000486d1ca1 type:MM_ANONPAGES val:22 [ 30.226467] ================================================================== [ 30.227537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.228419] Read of size 8 at addr ffff88800dbb3140 by task sshd/220 [ 30.229131] [ 30.229336] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.230231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.231140] Call Trace: [ 30.231442] [ 30.231742] dump_stack_lvl+0x91/0xf0 [ 30.232222] print_report+0xcc/0x620 [ 30.232679] ? __virt_addr_valid+0x102/0x340 [ 30.233196] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.233777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.234353] kasan_report+0xbe/0xf0 [ 30.234801] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.235383] vma_interval_tree_remove+0xc75/0xec0 [ 30.235959] vma_prepare+0xc54/0x11a0 [ 30.236408] __split_vma+0x5af/0x950 [ 30.236852] ? __pfx___split_vma+0x10/0x10 [ 30.237344] ? find_held_lock+0x2c/0x110 [ 30.237836] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.238367] ? lock_is_held_type+0x9f/0x120 [ 30.238873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.239442] ? mtree_range_walk+0x632/0x900 [ 30.240065] ? mas_walk+0x5c7/0x7c0 [ 30.240555] do_vmi_munmap+0x1f1/0x2b0 [ 30.241051] mmap_region+0x1f9/0x2660 [ 30.241540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.242057] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.242779] ? __pfx_lock_acquire+0x10/0x10 [ 30.243318] ? __pfx_mmap_region+0x10/0x10 [ 30.243854] ? security_mmap_addr+0x7d/0xa0 [ 30.244394] ? get_unmapped_area+0x1f5/0x3f0 [ 30.244948] do_mmap+0x854/0xf00 [ 30.245389] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.245890] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.246462] ksys_mmap_pgoff+0x3af/0x500 [ 30.246971] do_syscall_64+0x3f/0x90 [ 30.247450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.248130] RIP: 0033:0x7fcde98a5d82 [ 30.248590] 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 [ 30.250749] RSP: 002b:00007ffc798bb978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.251671] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcde98a5d82 [ 30.252553] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcde8cdf000 [ 30.253394] RBP: 00007fcde8cdf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.254240] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556f94b3b20 [ 30.255084] R13: 00007ffc798bb990 R14: 00007ffc798bb9c0 R15: 00007ffc798bbd20 [ 30.255957] [ 30.256249] [ 30.256465] Allocated by task 213: [ 30.256891] kasan_save_stack+0x22/0x50 [ 30.257397] kasan_set_track+0x25/0x30 [ 30.257891] __kasan_slab_alloc+0x59/0x70 [ 30.258412] kmem_cache_alloc+0x16b/0x370 [ 30.258930] vm_area_dup+0x20/0x160 [ 30.259382] __split_vma+0x170/0x950 [ 30.259848] split_vma+0xc6/0x110 [ 30.260299] mprotect_fixup+0x8d2/0xb30 [ 30.260802] do_mprotect_pkey+0x87e/0xd40 [ 30.261324] __x64_sys_mprotect+0x78/0xc0 [ 30.261845] do_syscall_64+0x3f/0x90 [ 30.262318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.262975] [ 30.263191] Freed by task 213: [ 30.263583] kasan_save_stack+0x22/0x50 [ 30.264102] kasan_set_track+0x25/0x30 [ 30.264597] kasan_save_free_info+0x2b/0x50 [ 30.265134] __kasan_slab_free+0x10a/0x190 [ 30.265670] kmem_cache_free+0x10d/0x4d0 [ 30.266182] rcu_core+0x8c8/0x2860 [ 30.266628] __do_softirq+0x1b7/0x7d4 [ 30.267107] [ 30.267322] Last potentially related work creation: [ 30.267926] kasan_save_stack+0x22/0x50 [ 30.268430] __kasan_record_aux_stack+0x8e/0xa0 [ 30.269011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.269665] remove_vma+0x139/0x170 [ 30.270122] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.270675] do_vmi_munmap+0x1f1/0x2b0 [ 30.271172] __vm_munmap+0x138/0x3a0 [ 30.271655] __x64_sys_munmap+0x59/0x80 [ 30.272179] do_syscall_64+0x3f/0x90 [ 30.272652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.273303] [ 30.273518] Second to last potentially related work creation: [ 30.274206] kasan_save_stack+0x22/0x50 [ 30.274706] __kasan_record_aux_stack+0x8e/0xa0 [ 30.275282] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.275928] remove_vma+0x139/0x170 [ 30.276383] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.276942] do_vmi_munmap+0x1f1/0x2b0 [ 30.277424] mmap_region+0x1f9/0x2660 [ 30.277901] do_mmap+0x854/0xf00 [ 30.278337] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.278860] ksys_mmap_pgoff+0x3af/0x500 [ 30.279338] do_syscall_64+0x3f/0x90 [ 30.279788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.280412] [ 30.280620] The buggy address belongs to the object at ffff88800dbb30e8 [ 30.280620] which belongs to the cache vm_area_struct of size 168 [ 30.281998] The buggy address is located 88 bytes inside of [ 30.281998] freed 168-byte region [ffff88800dbb30e8, ffff88800dbb3190) [ 30.283311] [ 30.283518] The buggy address belongs to the physical page: [ 30.284150] page:00000000335cd2a0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbb3 [ 30.285162] memcg:ffff88800dd75801 [ 30.285564] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.286168] page_type: 0xffffffff() [ 30.286592] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.287455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd75801 [ 30.288316] page dumped because: kasan: bad access detected [ 30.288933] [ 30.289136] Memory state around the buggy address: [ 30.289683] ffff88800dbb3000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.290481] ffff88800dbb3080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.291279] >ffff88800dbb3100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.292090] ^ [ 30.292689] ffff88800dbb3180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.293492] ffff88800dbb3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.294292] ================================================================== [ 30.295278] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.589077] BUG: Bad rss-counter state mm:00000000b59df73e type:MM_FILEPAGES val:33 [ 32.589946] BUG: Bad rss-counter state mm:00000000b59df73e type:MM_ANONPAGES val:22 [ 33.006817] BUG: Bad rss-counter state mm:000000001ebeec46 type:MM_FILEPAGES val:33 [ 33.007816] BUG: Bad rss-counter state mm:000000001ebeec46 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41260' (ECDSA) to the list of known hosts. 2023/06/20 21:28:56 fuzzer started 2023/06/20 21:28:56 dialing manager at localhost:36067 2023/06/20 21:28:56 checking machine... 2023/06/20 21:28:56 checking revisions... [ 33.652041] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:28:56 testing simple program... [ 33.707975] cgroup: Unknown subsys name 'net' [ 33.757856] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:56 Registers: info registers vcpu 0 RAX=0000000080010001 RBX=1ffff1100d9c13a8 RCX=ffffffff813ed8b2 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff8542a6c0 RSP=ffff88806ce09d30 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000001698e8eecc R12=0000000000000000 R13=ffff88806ce2c240 R14=ffffffff85407d68 R15=dffffc0000000000 RIP=ffffffff814c0250 RFL=00000046 [---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 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=00007f7e4331e660 CR3=0000000008cc6000 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=1462106c23144aabd44e029cab4d32fd XMM02=000000000011acb8eff9b2d0a8fce9cb XMM03=000000000011ad882c67c8bc2e329bc3 XMM04=ca5086b8bc11060500000000000ae988 XMM05=19e9129bd510f2350000000000132970 XMM06=f1cbf17edc06cce40000000000131b48 XMM07=e042d86d42eb936e0000000000121a80 XMM08=bcec88883e5d6024000000000011ad88 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001910bdb RBX=ffff88800c885ea8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c885ed8 RBP=ffff88800c8e7570 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6d53 R12=dffffc0000000000 R13=ffff88800c78c730 R14=ffffffff813782f8 R15=ffff88800c78c730 RIP=ffffffff818464ec RFL=00000046 [---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 00007f42d8331900 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=000055e5962ab3b0 CR3=000000000eec6000 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=6720646572637465733a4d41503d706f 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