[ 30.264694] BUG: Bad rss-counter state mm:00000000e64ce89e type:MM_FILEPAGES val:33 [ 30.265917] BUG: Bad rss-counter state mm:00000000e64ce89e type:MM_ANONPAGES val:22 [ 30.303339] ================================================================== [ 30.304351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.305322] Read of size 8 at addr ffff888015afa228 by task sshd/219 [ 30.306097] [ 30.306318] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.307184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.308152] Call Trace: [ 30.308475] [ 30.308759] dump_stack_lvl+0x91/0xf0 [ 30.309267] print_report+0xcc/0x620 [ 30.309754] ? __virt_addr_valid+0x102/0x340 [ 30.310309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310938] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311556] kasan_report+0xbe/0xf0 [ 30.312028] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.312640] vma_interval_tree_remove+0xc75/0xec0 [ 30.313250] vma_prepare+0xc54/0x11a0 [ 30.313725] __split_vma+0x5af/0x950 [ 30.314193] ? __pfx___split_vma+0x10/0x10 [ 30.314719] ? find_held_lock+0x2c/0x110 [ 30.315242] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.315808] ? lock_is_held_type+0x9f/0x120 [ 30.316350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.316963] ? mtree_range_walk+0x632/0x900 [ 30.317539] ? mas_walk+0x5c7/0x7c0 [ 30.318011] do_vmi_munmap+0x1f1/0x2b0 [ 30.318505] mmap_region+0x1f9/0x2660 [ 30.318995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.319513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.320230] ? __pfx_lock_acquire+0x10/0x10 [ 30.320767] ? __pfx_mmap_region+0x10/0x10 [ 30.321327] ? security_mmap_addr+0x7d/0xa0 [ 30.321861] ? get_unmapped_area+0x1f5/0x3f0 [ 30.322415] do_mmap+0x854/0xf00 [ 30.322861] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.323361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.323929] ksys_mmap_pgoff+0x3af/0x500 [ 30.324436] do_syscall_64+0x3f/0x90 [ 30.324921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.325592] RIP: 0033:0x7f16cbb54d82 [ 30.326064] 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 [ 30.328220] RSP: 002b:00007ffe84436518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.329141] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16cbb54d82 [ 30.329999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16caf8e000 [ 30.331054] RBP: 00007f16caf8e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.331898] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559f96e48f70 [ 30.332755] R13: 00007ffe84436530 R14: 00007ffe84436560 R15: 00007ffe844368c0 [ 30.333646] [ 30.333941] [ 30.334156] Allocated by task 212: [ 30.334588] kasan_save_stack+0x22/0x50 [ 30.335101] kasan_set_track+0x25/0x30 [ 30.335597] __kasan_slab_alloc+0x59/0x70 [ 30.336123] kmem_cache_alloc+0x16b/0x370 [ 30.336646] vm_area_dup+0x20/0x160 [ 30.337125] __split_vma+0x170/0x950 [ 30.337596] split_vma+0xc6/0x110 [ 30.338033] mprotect_fixup+0x8d2/0xb30 [ 30.338546] do_mprotect_pkey+0x87e/0xd40 [ 30.339067] __x64_sys_mprotect+0x78/0xc0 [ 30.339593] do_syscall_64+0x3f/0x90 [ 30.340069] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340722] [ 30.340938] Freed by task 212: [ 30.341339] kasan_save_stack+0x22/0x50 [ 30.341849] kasan_set_track+0x25/0x30 [ 30.342348] kasan_save_free_info+0x2b/0x50 [ 30.342884] __kasan_slab_free+0x10a/0x190 [ 30.343423] kmem_cache_free+0x10d/0x4d0 [ 30.343943] rcu_core+0x8c8/0x2860 [ 30.344396] __do_softirq+0x1b7/0x7d4 [ 30.344882] [ 30.345103] Last potentially related work creation: [ 30.345688] kasan_save_stack+0x22/0x50 [ 30.346192] __kasan_record_aux_stack+0x8e/0xa0 [ 30.346772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.347414] remove_vma+0x139/0x170 [ 30.347860] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.348419] do_vmi_munmap+0x1f1/0x2b0 [ 30.348906] __vm_munmap+0x138/0x3a0 [ 30.349390] __x64_sys_munmap+0x59/0x80 [ 30.349886] do_syscall_64+0x3f/0x90 [ 30.350355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.350994] [ 30.351212] The buggy address belongs to the object at ffff888015afa1d0 [ 30.351212] which belongs to the cache vm_area_struct of size 168 [ 30.352677] The buggy address is located 88 bytes inside of [ 30.352677] freed 168-byte region [ffff888015afa1d0, ffff888015afa278) [ 30.354093] [ 30.354313] The buggy address belongs to the physical page: [ 30.354977] page:000000002e9a1a25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15afa [ 30.356058] memcg:ffff88801bc91301 [ 30.356485] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.357153] page_type: 0xffffffff() [ 30.357603] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.358522] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc91301 [ 30.359421] page dumped because: kasan: bad access detected [ 30.360080] [ 30.360301] Memory state around the buggy address: [ 30.360879] ffff888015afa100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.361740] ffff888015afa180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.362662] >ffff888015afa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.363592] ^ [ 30.364192] ffff888015afa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.365125] ffff888015afa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.366026] ================================================================== [ 30.367168] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.292281] BUG: Bad rss-counter state mm:0000000082e841d2 type:MM_FILEPAGES val:33 [ 32.293556] BUG: Bad rss-counter state mm:0000000082e841d2 type:MM_ANONPAGES val:22 [ 32.794701] BUG: Bad rss-counter state mm:00000000f2b55d43 type:MM_FILEPAGES val:33 [ 32.795793] BUG: Bad rss-counter state mm:00000000f2b55d43 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45875' (ECDSA) to the list of known hosts. 2023/06/19 16:02:54 fuzzer started 2023/06/19 16:02:54 dialing manager at localhost:44161 2023/06/19 16:02:54 checking machine... 2023/06/19 16:02:54 checking revisions... [ 33.527428] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:02:54 testing simple program... [ 33.578105] cgroup: Unknown subsys name 'net' [ 33.616583] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:02:47 Registers: info registers vcpu 0 RAX=ffffffff81935d9a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002dbeed0 RSI=ffffffff81935d9a RDI=ffff888016df76f0 RBP=ffff888016df76c0 RSP=ffff888016df7620 R8 =0000000000000001 R9 =ffff888016df7668 R10=0000000000038001 R11=000000000002c9ea R12=ffff888016df76f0 R13=0000000000000000 R14=ffff88800fd10000 R15=0000000000000d40 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 00007fb5459f2700 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=00007fc9959f4d30 CR3=0000000016d78000 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=2033353a32303a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32303a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=0000000000003ad6 RSI=0000000000003ad6 RDI=ffffffff864f6718 RBP=ffff88806cf09a78 RSP=ffff88806cf099b0 R8 =0000000000000000 R9 =ffff88806cf09a60 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09a80 R13=ffff88806cf09a68 R14=ffff88806cf09a61 R15=ffff88806cf09a20 RIP=ffffffff8113077a 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 00007ff70aef8900 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=00007ffd74133000 CR3=0000000010254000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000