[ 31.462631] BUG: Bad rss-counter state mm:000000005fd7d372 type:MM_FILEPAGES val:33 [ 31.463936] BUG: Bad rss-counter state mm:000000005fd7d372 type:MM_ANONPAGES val:22 [ 31.623209] ================================================================== [ 31.624117] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.625043] Read of size 8 at addr ffff88800eccc3f8 by task sshd/218 [ 31.625803] [ 31.626026] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.627028] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.628011] Call Trace: [ 31.628327] [ 31.628619] dump_stack_lvl+0x91/0xf0 [ 31.629124] print_report+0xcc/0x620 [ 31.629603] ? __virt_addr_valid+0x102/0x340 [ 31.630185] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.630796] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.631411] kasan_report+0xbe/0xf0 [ 31.631890] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.632521] vma_interval_tree_remove+0xc75/0xec0 [ 31.633119] vma_prepare+0xc54/0x11a0 [ 31.633600] __split_vma+0x5af/0x950 [ 31.634084] ? __pfx___split_vma+0x10/0x10 [ 31.634617] ? find_held_lock+0x2c/0x110 [ 31.635137] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.635702] ? lock_is_held_type+0x9f/0x120 [ 31.636237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.636850] ? mtree_range_walk+0x632/0x900 [ 31.637406] ? mas_walk+0x5c7/0x7c0 [ 31.637881] do_vmi_munmap+0x1f1/0x2b0 [ 31.638386] mmap_region+0x1f9/0x2660 [ 31.638865] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.639385] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.640115] ? __pfx_lock_acquire+0x10/0x10 [ 31.640643] ? __pfx_mmap_region+0x10/0x10 [ 31.641173] ? security_mmap_addr+0x7d/0xa0 [ 31.641710] ? get_unmapped_area+0x1f5/0x3f0 [ 31.642288] do_mmap+0x854/0xf00 [ 31.642725] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.643219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.643780] ksys_mmap_pgoff+0x3af/0x500 [ 31.644284] do_syscall_64+0x3f/0x90 [ 31.644770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.645415] RIP: 0033:0x7f42a0e0dd82 [ 31.645875] 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 [ 31.648030] RSP: 002b:00007ffe88dddd38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.648945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f42a0e0dd82 [ 31.649789] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f42a0247000 [ 31.650652] RBP: 00007f42a0247000 R08: 0000000000000009 R09: 0000000000001000 [ 31.651515] R10: 0000000000000812 R11: 0000000000000206 R12: 000055895af22ec0 [ 31.652373] R13: 00007ffe88dddd50 R14: 00007ffe88dddd80 R15: 00007ffe88dde0e0 [ 31.653226] [ 31.653521] [ 31.653737] Allocated by task 211: [ 31.654186] kasan_save_stack+0x22/0x50 [ 31.654701] kasan_set_track+0x25/0x30 [ 31.655198] __kasan_slab_alloc+0x59/0x70 [ 31.655722] kmem_cache_alloc+0x16b/0x370 [ 31.656235] vm_area_dup+0x20/0x160 [ 31.656689] __split_vma+0x170/0x950 [ 31.657158] split_vma+0xc6/0x110 [ 31.657598] mprotect_fixup+0x8d2/0xb30 [ 31.658107] do_mprotect_pkey+0x87e/0xd40 [ 31.658632] __x64_sys_mprotect+0x78/0xc0 [ 31.659150] do_syscall_64+0x3f/0x90 [ 31.659625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.660266] [ 31.660480] Freed by task 211: [ 31.660878] kasan_save_stack+0x22/0x50 [ 31.661388] kasan_set_track+0x25/0x30 [ 31.661889] kasan_save_free_info+0x2b/0x50 [ 31.662448] __kasan_slab_free+0x10a/0x190 [ 31.662985] kmem_cache_free+0x10d/0x4d0 [ 31.663502] rcu_core+0x8c8/0x2860 [ 31.663956] __do_softirq+0x1b7/0x7d4 [ 31.664433] [ 31.664648] Last potentially related work creation: [ 31.665234] kasan_save_stack+0x22/0x50 [ 31.665740] __kasan_record_aux_stack+0x8e/0xa0 [ 31.666337] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.666992] remove_vma+0x139/0x170 [ 31.667445] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.668107] do_vmi_munmap+0x1f1/0x2b0 [ 31.668598] __vm_munmap+0x138/0x3a0 [ 31.669072] __x64_sys_munmap+0x59/0x80 [ 31.669575] do_syscall_64+0x3f/0x90 [ 31.670066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.670713] [ 31.670934] The buggy address belongs to the object at ffff88800eccc3a0 [ 31.670934] which belongs to the cache vm_area_struct of size 168 [ 31.672427] The buggy address is located 88 bytes inside of [ 31.672427] freed 168-byte region [ffff88800eccc3a0, ffff88800eccc448) [ 31.673830] [ 31.674059] The buggy address belongs to the physical page: [ 31.674720] page:0000000036f1b50e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeccc [ 31.675813] memcg:ffff88800eb96e01 [ 31.676240] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.676885] page_type: 0xffffffff() [ 31.677333] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.678273] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb96e01 [ 31.679177] page dumped because: kasan: bad access detected [ 31.679838] [ 31.680052] Memory state around the buggy address: [ 31.680666] ffff88800eccc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.681546] ffff88800eccc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.682430] >ffff88800eccc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.683286] ^ [ 31.684137] ffff88800eccc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.684991] ffff88800eccc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.685841] ================================================================== [ 31.686942] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.670729] BUG: Bad rss-counter state mm:00000000e1e5e55e type:MM_FILEPAGES val:33 [ 33.671609] BUG: Bad rss-counter state mm:00000000e1e5e55e type:MM_ANONPAGES val:22 [ 34.132255] BUG: Bad rss-counter state mm:00000000ab253a37 type:MM_FILEPAGES val:33 [ 34.133765] BUG: Bad rss-counter state mm:00000000ab253a37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40838' (ECDSA) to the list of known hosts. 2023/06/20 13:35:07 fuzzer started 2023/06/20 13:35:07 dialing manager at localhost:36067 2023/06/20 13:35:07 checking machine... 2023/06/20 13:35:07 checking revisions... [ 34.897883] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:35:07 testing simple program... [ 34.944923] cgroup: Unknown subsys name 'net' [ 35.002715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:35:06 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=ffffffff834a3c42 RDX=ffffffff8542a6c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffffffff85407df0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c04000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0261 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=00007f831f22c790 CR3=000000000cb38000 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=17daa632d44fd3bc2d4a313505ffb348 XMM02=000000000011bfb0ec2efd57dc4c00df XMM03=00000000001225c09d0c790bec94f087 XMM04=27132f904096df7c00000000000ae988 XMM05=751b9502027dc0b90000000000132180 XMM06=0554544d658000c00000000000131358 XMM07=e042d86d42eb936e0000000000122840 XMM08=9d0c790bec94f087000000000011c010 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbfb97 RBX=ffffffff85dfdcb8 RCX=ffffffff81809adc RDX=0000000000000000 RSI=ffffffff86138976 RDI=ffffffff85dfdcb8 RBP=ffffffff85dfdcb8 RSP=ffff8880146b7910 R8 =ffffffff86138976 R9 =ffff8880146b7a08 R10=0000000000038001 R11=0000000000020cbd R12=ffffffff85dfdcb8 R13=ffffffff85dfdcb8 R14=ffffffff85dfdcb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9a53138900 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=0000561d50503c9c CR3=000000001a218000 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