[ 31.334678] BUG: Bad rss-counter state mm:000000006017c0d2 type:MM_FILEPAGES val:33 [ 31.336172] BUG: Bad rss-counter state mm:000000006017c0d2 type:MM_ANONPAGES val:22 [ 31.485531] ================================================================== [ 31.486444] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.487401] Read of size 8 at addr ffff88800ea1c140 by task sshd/220 [ 31.488244] [ 31.488476] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.489356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.490358] Call Trace: [ 31.490688] [ 31.490976] dump_stack_lvl+0x91/0xf0 [ 31.491475] print_report+0xcc/0x620 [ 31.491963] ? __virt_addr_valid+0x102/0x340 [ 31.492522] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.493164] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.493786] kasan_report+0xbe/0xf0 [ 31.494278] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.494906] vma_interval_tree_remove+0xc75/0xec0 [ 31.495507] vma_prepare+0xc54/0x11a0 [ 31.495984] __split_vma+0x5af/0x950 [ 31.496463] ? __pfx___split_vma+0x10/0x10 [ 31.497017] ? find_held_lock+0x2c/0x110 [ 31.497536] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.498107] ? lock_is_held_type+0x9f/0x120 [ 31.498649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.499260] ? mtree_range_walk+0x632/0x900 [ 31.499817] ? mas_walk+0x5c7/0x7c0 [ 31.500301] do_vmi_munmap+0x1f1/0x2b0 [ 31.500809] mmap_region+0x1f9/0x2660 [ 31.501292] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.501813] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.502530] ? __pfx_lock_acquire+0x10/0x10 [ 31.503068] ? __pfx_mmap_region+0x10/0x10 [ 31.503608] ? security_mmap_addr+0x7d/0xa0 [ 31.504144] ? get_unmapped_area+0x1f5/0x3f0 [ 31.504725] do_mmap+0x854/0xf00 [ 31.505164] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.505669] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.506239] ksys_mmap_pgoff+0x3af/0x500 [ 31.506754] do_syscall_64+0x3f/0x90 [ 31.507236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.507890] RIP: 0033:0x7fba50f33d82 [ 31.508346] 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 [ 31.510476] RSP: 002b:00007ffdaa876288 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.511384] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba50f33d82 [ 31.512237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba5036d000 [ 31.513103] RBP: 00007fba5036d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.513943] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1c822dec0 [ 31.514800] R13: 00007ffdaa8762a0 R14: 00007ffdaa8762d0 R15: 00007ffdaa876630 [ 31.515656] [ 31.515949] [ 31.516166] Allocated by task 213: [ 31.516591] kasan_save_stack+0x22/0x50 [ 31.517113] kasan_set_track+0x25/0x30 [ 31.517606] __kasan_slab_alloc+0x59/0x70 [ 31.518132] kmem_cache_alloc+0x16b/0x370 [ 31.518651] vm_area_dup+0x20/0x160 [ 31.519129] __split_vma+0x170/0x950 [ 31.519605] split_vma+0xc6/0x110 [ 31.520051] mprotect_fixup+0x8d2/0xb30 [ 31.520550] do_mprotect_pkey+0x87e/0xd40 [ 31.521081] __x64_sys_mprotect+0x78/0xc0 [ 31.521606] do_syscall_64+0x3f/0x90 [ 31.522086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.522741] [ 31.522958] Freed by task 213: [ 31.523349] kasan_save_stack+0x22/0x50 [ 31.523855] kasan_set_track+0x25/0x30 [ 31.524354] kasan_save_free_info+0x2b/0x50 [ 31.524910] __kasan_slab_free+0x10a/0x190 [ 31.525447] kmem_cache_free+0x10d/0x4d0 [ 31.525961] rcu_core+0x8c8/0x2860 [ 31.526407] __do_softirq+0x1b7/0x7d4 [ 31.526892] [ 31.527106] Last potentially related work creation: [ 31.527704] kasan_save_stack+0x22/0x50 [ 31.528223] __kasan_record_aux_stack+0x8e/0xa0 [ 31.528809] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.529453] remove_vma+0x139/0x170 [ 31.529902] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.530456] do_vmi_munmap+0x1f1/0x2b0 [ 31.530936] __vm_munmap+0x138/0x3a0 [ 31.531402] __x64_sys_munmap+0x59/0x80 [ 31.531891] do_syscall_64+0x3f/0x90 [ 31.532365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.533018] [ 31.533233] Second to last potentially related work creation: [ 31.533919] kasan_save_stack+0x22/0x50 [ 31.534417] __kasan_record_aux_stack+0x8e/0xa0 [ 31.535014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.535646] remove_vma+0x139/0x170 [ 31.536095] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.536668] do_vmi_munmap+0x1f1/0x2b0 [ 31.537174] mmap_region+0x1f9/0x2660 [ 31.537670] do_mmap+0x854/0xf00 [ 31.538115] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.538629] ksys_mmap_pgoff+0x3af/0x500 [ 31.539147] do_syscall_64+0x3f/0x90 [ 31.539644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.540308] [ 31.540535] The buggy address belongs to the object at ffff88800ea1c0e8 [ 31.540535] which belongs to the cache vm_area_struct of size 168 [ 31.542068] The buggy address is located 88 bytes inside of [ 31.542068] freed 168-byte region [ffff88800ea1c0e8, ffff88800ea1c190) [ 31.543532] [ 31.543753] The buggy address belongs to the physical page: [ 31.544449] page:00000000d51ae412 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea1c [ 31.545599] memcg:ffff88800cddaa01 [ 31.546039] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.546719] page_type: 0xffffffff() [ 31.547184] raw: 0100000000000200 ffff8880087a0c80 ffffea000038cc00 dead000000000008 [ 31.548140] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cddaa01 [ 31.549100] page dumped because: kasan: bad access detected [ 31.549800] [ 31.550024] Memory state around the buggy address: [ 31.550639] ffff88800ea1c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.551541] ffff88800ea1c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.552429] >ffff88800ea1c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.553293] ^ [ 31.553929] ffff88800ea1c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.554778] ffff88800ea1c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.555622] ================================================================== [ 31.556769] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.830121] BUG: Bad rss-counter state mm:00000000206b9144 type:MM_FILEPAGES val:33 [ 33.831272] BUG: Bad rss-counter state mm:00000000206b9144 type:MM_ANONPAGES val:22 [ 34.241644] BUG: Bad rss-counter state mm:00000000c8447be7 type:MM_FILEPAGES val:33 [ 34.242816] BUG: Bad rss-counter state mm:00000000c8447be7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62765' (ECDSA) to the list of known hosts. 2023/06/20 14:30:50 fuzzer started 2023/06/20 14:30:50 dialing manager at localhost:36067 2023/06/20 14:30:50 checking machine... 2023/06/20 14:30:50 checking revisions... [ 34.993177] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:30:50 testing simple program... [ 35.038848] cgroup: Unknown subsys name 'net' [ 35.075431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:50 Registers: info registers vcpu 0 RAX=1ffffffff0c1a4b1 RBX=0000000000000001 RCX=ffffffff860d2586 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff860d2588 RBP=ffff888018047578 RSP=ffff8880180474b0 R8 =ffffffff860d258a R9 =ffff888018047560 R10=0000000000038001 R11=000000000000fc0c R12=ffff888018047580 R13=ffff888018047568 R14=ffff8880180478e0 R15=ffff888018047520 RIP=ffffffff811311c7 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 00007f9bc8877700 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=00007f28419ea170 CR3=0000000015ab6000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030353a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002d41ed3 RSI=ffffffff844ae59b RDI=ffff888016a0f698 RBP=ffff888016a0f730 RSP=ffff888016a0f670 R8 =0000000000000001 R9 =ffff888016a0f6d8 R10=0000000000038001 R11=0000000000020cc7 R12=ffff888016a0f760 R13=0000000000000000 R14=ffff888018301b40 R15=ffff888016a0f698 RIP=ffffffff811305f0 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 00007f6edaefe900 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=00007f6edaedd020 CR3=000000000cca6000 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=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