[ 24.070851] BUG: Bad rss-counter state mm:00000000980054af type:MM_FILEPAGES val:33 [ 24.072188] BUG: Bad rss-counter state mm:00000000980054af type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 24.216359] ================================================================== [ 24.217251] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.218175] Read of size 8 at addr ffff88800cb746b0 by task sshd/219 [ 24.219120] [ 24.219342] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.220196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.221204] Call Trace: [ 24.221527] [ 24.221815] dump_stack_lvl+0x91/0xf0 [ 24.222303] print_report+0xcc/0x620 [ 24.222817] ? __virt_addr_valid+0x102/0x340 [ 24.223360] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.223973] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.224592] kasan_report+0xbe/0xf0 [ 24.225073] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.225697] vma_interval_tree_remove+0xc75/0xec0 [ 24.226299] vma_prepare+0xc54/0x11a0 [ 24.226783] __split_vma+0x5af/0x950 [ 24.227264] ? __pfx___split_vma+0x10/0x10 [ 24.227792] ? find_held_lock+0x2c/0x110 [ 24.228309] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.228880] ? lock_is_held_type+0x9f/0x120 [ 24.229430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.230035] ? mtree_range_walk+0x632/0x900 [ 24.230591] ? mas_walk+0x5c7/0x7c0 [ 24.231066] do_vmi_munmap+0x1f1/0x2b0 [ 24.231566] mmap_region+0x1f9/0x2660 [ 24.232045] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.232556] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.233256] ? __pfx_lock_acquire+0x10/0x10 [ 24.233785] ? __pfx_mmap_region+0x10/0x10 [ 24.234316] ? security_mmap_addr+0x7d/0xa0 [ 24.234874] ? get_unmapped_area+0x1f5/0x3f0 [ 24.235424] do_mmap+0x854/0xf00 [ 24.235863] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.236356] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.236918] ksys_mmap_pgoff+0x3af/0x500 [ 24.237426] do_syscall_64+0x3f/0x90 [ 24.237900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.238555] RIP: 0033:0x7f9472ce8d82 [ 24.239015] 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 [ 24.241112] RSP: 002b:00007fff74d0d9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.242009] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9472ce8d82 [ 24.242869] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9472122000 [ 24.243708] RBP: 00007f9472122000 R08: 0000000000000009 R09: 0000000000001000 [ 24.244550] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563712928980 [ 24.245384] R13: 00007fff74d0d9c0 R14: 00007fff74d0d9f0 R15: 00007fff74d0dd50 [ 24.246230] [ 24.246541] [ 24.246760] Allocated by task 212: [ 24.247190] kasan_save_stack+0x22/0x50 [ 24.247692] kasan_set_track+0x25/0x30 [ 24.248177] __kasan_slab_alloc+0x59/0x70 [ 24.248694] kmem_cache_alloc+0x16b/0x370 [ 24.249209] vm_area_dup+0x20/0x160 [ 24.249657] __split_vma+0x170/0x950 [ 24.250117] split_vma+0xc6/0x110 [ 24.250571] mprotect_fixup+0x8d2/0xb30 [ 24.251066] do_mprotect_pkey+0x87e/0xd40 [ 24.251583] __x64_sys_mprotect+0x78/0xc0 [ 24.252098] do_syscall_64+0x3f/0x90 [ 24.252566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.253199] [ 24.253410] Freed by task 212: [ 24.253802] kasan_save_stack+0x22/0x50 [ 24.254298] kasan_set_track+0x25/0x30 [ 24.254804] kasan_save_free_info+0x2b/0x50 [ 24.255331] __kasan_slab_free+0x10a/0x190 [ 24.255865] kmem_cache_free+0x10d/0x4d0 [ 24.256377] rcu_core+0x8c8/0x2860 [ 24.256825] __do_softirq+0x1b7/0x7d4 [ 24.257301] [ 24.257516] Last potentially related work creation: [ 24.258096] kasan_save_stack+0x22/0x50 [ 24.258605] __kasan_record_aux_stack+0x8e/0xa0 [ 24.259175] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.259864] remove_vma+0x139/0x170 [ 24.260332] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.260887] do_vmi_munmap+0x1f1/0x2b0 [ 24.261366] __vm_munmap+0x138/0x3a0 [ 24.261829] __x64_sys_munmap+0x59/0x80 [ 24.262324] do_syscall_64+0x3f/0x90 [ 24.262820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.263454] [ 24.263669] The buggy address belongs to the object at ffff88800cb74658 [ 24.263669] which belongs to the cache vm_area_struct of size 168 [ 24.265118] The buggy address is located 88 bytes inside of [ 24.265118] freed 168-byte region [ffff88800cb74658, ffff88800cb74700) [ 24.266519] [ 24.266735] The buggy address belongs to the physical page: [ 24.267388] page:000000009eb5a08b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb74 [ 24.268462] memcg:ffff88800c3d4201 [ 24.268887] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.269575] page_type: 0xffffffff() [ 24.270023] raw: 0100000000000200 ffff8880087a0c80 ffffea00003835c0 dead000000000005 [ 24.270953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c3d4201 [ 24.271856] page dumped because: kasan: bad access detected [ 24.272511] [ 24.272730] Memory state around the buggy address: [ 24.273298] ffff88800cb74580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.274142] ffff88800cb74600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.275017] >ffff88800cb74680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.275866] ^ [ 24.276453] ffff88800cb74700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.277309] ffff88800cb74780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.278157] ================================================================== [ 24.279177] Disabling lock debugging due to kernel taint [ 26.345192] BUG: Bad rss-counter state mm:00000000f46af8a5 type:MM_FILEPAGES val:33 [ 26.346343] BUG: Bad rss-counter state mm:00000000f46af8a5 type:MM_ANONPAGES val:22 [ 26.798426] BUG: Bad rss-counter state mm:00000000d1d1c28a type:MM_FILEPAGES val:33 [ 26.799626] BUG: Bad rss-counter state mm:00000000d1d1c28a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39861' (ECDSA) to the list of known hosts. 2023/06/21 05:23:21 fuzzer started 2023/06/21 05:23:21 dialing manager at localhost:36067 2023/06/21 05:23:21 checking machine... 2023/06/21 05:23:21 checking revisions... [ 27.440566] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:23:21 testing simple program... [ 27.495093] cgroup: Unknown subsys name 'net' [ 27.545193] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:23:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800dc6b680 RSI=ffffffff8386a735 RDI=ffff888010038a08 RBP=00000000000000e4 RSP=ffff88800cc4fa88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888008fe8ea0 R13=ffff888010038a00 R14=dffffc0000000000 R15=ffff888010038a00 RIP=ffffffff8386a745 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 00007f44047e6900 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=00007ffd155f3000 CR3=000000000d904000 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=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 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=0000000000000001 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=00007f9ef627a000 CR3=000000000f426000 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=2030323a33323a3530203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a33323a3530203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000