[ 23.683878] BUG: Bad rss-counter state mm:0000000044ec2ef7 type:MM_FILEPAGES val:33 [ 23.684880] BUG: Bad rss-counter state mm:0000000044ec2ef7 type:MM_ANONPAGES val:22 [ 23.847693] ================================================================== [ 23.848620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.849552] Read of size 8 at addr ffff88800f110a50 by task sshd/219 [ 23.850324] [ 23.850545] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.851519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.852485] Call Trace: [ 23.852807] [ 23.853100] dump_stack_lvl+0x91/0xf0 [ 23.853588] print_report+0xcc/0x620 [ 23.854091] ? __virt_addr_valid+0x102/0x340 [ 23.854646] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.855257] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.855865] kasan_report+0xbe/0xf0 [ 23.856334] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.856951] vma_interval_tree_remove+0xc75/0xec0 [ 23.857545] vma_prepare+0xc54/0x11a0 [ 23.858028] __split_vma+0x5af/0x950 [ 23.858502] ? __pfx___split_vma+0x10/0x10 [ 23.859034] ? find_held_lock+0x2c/0x110 [ 23.859550] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.860121] ? lock_is_held_type+0x9f/0x120 [ 23.860653] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.861255] ? mtree_range_walk+0x632/0x900 [ 23.861802] ? mas_walk+0x5c7/0x7c0 [ 23.862289] do_vmi_munmap+0x1f1/0x2b0 [ 23.862779] mmap_region+0x1f9/0x2660 [ 23.863264] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.863773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.864488] ? __pfx_lock_acquire+0x10/0x10 [ 23.865022] ? __pfx_mmap_region+0x10/0x10 [ 23.865559] ? security_mmap_addr+0x7d/0xa0 [ 23.866103] ? get_unmapped_area+0x1f5/0x3f0 [ 23.866652] do_mmap+0x854/0xf00 [ 23.867099] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.867599] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.868162] ksys_mmap_pgoff+0x3af/0x500 [ 23.868669] do_syscall_64+0x3f/0x90 [ 23.869159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.869813] RIP: 0033:0x7fea7b40ed82 [ 23.870281] 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 [ 23.872424] RSP: 002b:00007ffd8d7b5bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.873348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea7b40ed82 [ 23.874223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea7a848000 [ 23.875066] RBP: 00007fea7a848000 R08: 0000000000000009 R09: 0000000000001000 [ 23.875913] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c8ae08f60 [ 23.876758] R13: 00007ffd8d7b5bd0 R14: 00007ffd8d7b5c00 R15: 00007ffd8d7b5f60 [ 23.877614] [ 23.877914] [ 23.878138] Allocated by task 212: [ 23.878565] kasan_save_stack+0x22/0x50 [ 23.879077] kasan_set_track+0x25/0x30 [ 23.879578] __kasan_slab_alloc+0x59/0x70 [ 23.880102] kmem_cache_alloc+0x16b/0x370 [ 23.880615] vm_area_dup+0x20/0x160 [ 23.881074] __split_vma+0x170/0x950 [ 23.881541] split_vma+0xc6/0x110 [ 23.882002] mprotect_fixup+0x8d2/0xb30 [ 23.882503] do_mprotect_pkey+0x87e/0xd40 [ 23.883029] __x64_sys_mprotect+0x78/0xc0 [ 23.883552] do_syscall_64+0x3f/0x90 [ 23.884026] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.884683] [ 23.884902] Freed by task 19: [ 23.885287] kasan_save_stack+0x22/0x50 [ 23.885793] kasan_set_track+0x25/0x30 [ 23.886296] kasan_save_free_info+0x2b/0x50 [ 23.886828] __kasan_slab_free+0x10a/0x190 [ 23.887362] kmem_cache_free+0x10d/0x4d0 [ 23.887874] rcu_core+0x8c8/0x2860 [ 23.888318] __do_softirq+0x1b7/0x7d4 [ 23.888793] [ 23.889009] Last potentially related work creation: [ 23.889605] kasan_save_stack+0x22/0x50 [ 23.890127] __kasan_record_aux_stack+0x8e/0xa0 [ 23.890708] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.891352] remove_vma+0x139/0x170 [ 23.891804] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.892381] do_vmi_munmap+0x1f1/0x2b0 [ 23.892879] __vm_munmap+0x138/0x3a0 [ 23.893346] __x64_sys_munmap+0x59/0x80 [ 23.893852] do_syscall_64+0x3f/0x90 [ 23.894353] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.895014] [ 23.895228] Second to last potentially related work creation: [ 23.895927] kasan_save_stack+0x22/0x50 [ 23.896433] __kasan_record_aux_stack+0x8e/0xa0 [ 23.897020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.897668] remove_vma+0x139/0x170 [ 23.898128] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.898700] do_vmi_munmap+0x1f1/0x2b0 [ 23.899196] mmap_region+0x1f9/0x2660 [ 23.899673] do_mmap+0x854/0xf00 [ 23.900108] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.900600] ksys_mmap_pgoff+0x3af/0x500 [ 23.901105] do_syscall_64+0x3f/0x90 [ 23.901582] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.902245] [ 23.902464] The buggy address belongs to the object at ffff88800f1109f8 [ 23.902464] which belongs to the cache vm_area_struct of size 168 [ 23.903943] The buggy address is located 88 bytes inside of [ 23.903943] freed 168-byte region [ffff88800f1109f8, ffff88800f110aa0) [ 23.905346] [ 23.905567] The buggy address belongs to the physical page: [ 23.906268] page:000000000e8dfcf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf110 [ 23.907358] memcg:ffff88800ef45f01 [ 23.907794] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.908455] page_type: 0xffffffff() [ 23.908928] raw: 0100000000000200 ffff8880087a0c80 ffffea000050c6c0 dead000000000008 [ 23.909876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef45f01 [ 23.910822] page dumped because: kasan: bad access detected [ 23.911491] [ 23.911716] Memory state around the buggy address: [ 23.912313] ffff88800f110900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.913196] ffff88800f110980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 23.914076] >ffff88800f110a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.914934] ^ [ 23.915660] ffff88800f110a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 23.916534] ffff88800f110b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.917410] ================================================================== [ 23.918421] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.745875] BUG: Bad rss-counter state mm:000000000c951ae3 type:MM_FILEPAGES val:33 [ 26.746905] BUG: Bad rss-counter state mm:000000000c951ae3 type:MM_ANONPAGES val:22 [ 27.316006] BUG: Bad rss-counter state mm:0000000017b4b99e type:MM_FILEPAGES val:33 [ 27.317162] BUG: Bad rss-counter state mm:0000000017b4b99e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40589' (ECDSA) to the list of known hosts. 2023/06/21 04:51:27 fuzzer started 2023/06/21 04:51:27 dialing manager at localhost:36067 2023/06/21 04:51:27 checking machine... 2023/06/21 04:51:27 checking revisions... [ 27.975855] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:51:27 testing simple program... [ 28.026342] cgroup: Unknown subsys name 'net' [ 28.063586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001665d63 RSI=ffffffff81370a8a RDI=ffff88800b32eb88 RBP=ffff88800b32eb58 RSP=ffff88800b32eab8 R8 =0000000000000001 R9 =ffff88800b32eb00 R10=0000000000038001 R11=0000000000020ed2 R12=ffff88800b32eb88 R13=0000000000000000 R14=ffff88800b378000 R15=ffff88800b32f258 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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=0000556dc8300fe0 CR3=0000000005482000 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=77b80000000000000008000000000013 XMM02=7ca000000000000e77cc000000000000 XMM03=00080000000000137ce000000000000e XMM04=784c0000000000000008000000000013 XMM05=00080000000000137de000000000000e XMM06=7da000000000000e781c000000000000 XMM07=78090000000000000008000000000013 XMM08=000000000014266000000000000ea5dd XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000011 RBX=0000000000000001 RCX=ffffffff813ad71f RDX=0000000000000011 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff8880142d7920 R8 =ffffffff860d8256 R9 =ffff8880142d7a18 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd838 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000287 [--S--PC] 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 00007f20d29f6900 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=00007f98c628a650 CR3=0000000008eae000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ecab4b1539ebbbc700000000000ae988 XMM05=2594e25153ef91e600000000001332f0 XMM06=806171799158d9670000000000131d70 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000