[ 25.300236] BUG: Bad rss-counter state mm:0000000044e56e83 type:MM_FILEPAGES val:33 [ 25.302227] BUG: Bad rss-counter state mm:0000000044e56e83 type:MM_ANONPAGES val:22 [ 25.460778] ================================================================== [ 25.461853] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.462998] Read of size 8 at addr ffff88800d8e8c20 by task sshd/219 [ 25.464016] [ 25.464241] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.465100] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.466090] Call Trace: [ 25.466415] <TASK> [ 25.466711] dump_stack_lvl+0x91/0xf0 [ 25.467198] print_report+0xcc/0x620 [ 25.467681] ? __virt_addr_valid+0x102/0x340 [ 25.468235] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.468852] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.469468] kasan_report+0xbe/0xf0 [ 25.469936] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.470567] vma_interval_tree_remove+0xc75/0xec0 [ 25.471184] vma_prepare+0xc54/0x11a0 [ 25.471664] __split_vma+0x5af/0x950 [ 25.472150] ? __pfx___split_vma+0x10/0x10 [ 25.472679] ? find_held_lock+0x2c/0x110 [ 25.473203] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.473770] ? lock_is_held_type+0x9f/0x120 [ 25.474304] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.474948] ? mtree_range_walk+0x632/0x900 [ 25.475495] ? mas_walk+0x5c7/0x7c0 [ 25.475970] do_vmi_munmap+0x1f1/0x2b0 [ 25.476473] mmap_region+0x1f9/0x2660 [ 25.476955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.477459] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.478170] ? __pfx_lock_acquire+0x10/0x10 [ 25.478712] ? __pfx_mmap_region+0x10/0x10 [ 25.479235] ? security_mmap_addr+0x7d/0xa0 [ 25.479762] ? get_unmapped_area+0x1f5/0x3f0 [ 25.480308] do_mmap+0x854/0xf00 [ 25.480751] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.481249] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.481830] ksys_mmap_pgoff+0x3af/0x500 [ 25.482343] do_syscall_64+0x3f/0x90 [ 25.482841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.483487] RIP: 0033:0x7fc2e3691d82 [ 25.483952] 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 [ 25.486071] RSP: 002b:00007ffd403c97a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.486996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc2e3691d82 [ 25.487843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc2e2acb000 [ 25.488688] RBP: 00007fc2e2acb000 R08: 0000000000000009 R09: 0000000000001000 [ 25.489536] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d6eb99d90 [ 25.490385] R13: 00007ffd403c97c0 R14: 00007ffd403c97f0 R15: 00007ffd403c9b50 [ 25.491253] </TASK> [ 25.491543] [ 25.491764] Allocated by task 212: [ 25.492196] kasan_save_stack+0x22/0x50 [ 25.492708] kasan_set_track+0x25/0x30 [ 25.493197] __kasan_slab_alloc+0x59/0x70 [ 25.493720] kmem_cache_alloc+0x16b/0x370 [ 25.494247] vm_area_dup+0x20/0x160 [ 25.494728] __split_vma+0x170/0x950 [ 25.495194] split_vma+0xc6/0x110 [ 25.495636] mprotect_fixup+0x8d2/0xb30 [ 25.496144] do_mprotect_pkey+0x87e/0xd40 [ 25.496665] __x64_sys_mprotect+0x78/0xc0 [ 25.497187] do_syscall_64+0x3f/0x90 [ 25.497661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.498296] [ 25.498508] Freed by task 19: [ 25.498903] kasan_save_stack+0x22/0x50 [ 25.499407] kasan_set_track+0x25/0x30 [ 25.499907] kasan_save_free_info+0x2b/0x50 [ 25.500436] __kasan_slab_free+0x10a/0x190 [ 25.500965] kmem_cache_free+0x10d/0x4d0 [ 25.501480] rcu_core+0x8c8/0x2860 [ 25.501930] __do_softirq+0x1b7/0x7d4 [ 25.502407] [ 25.502649] Last potentially related work creation: [ 25.503229] kasan_save_stack+0x22/0x50 [ 25.503741] __kasan_record_aux_stack+0x8e/0xa0 [ 25.504316] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.505024] remove_vma+0x139/0x170 [ 25.505471] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.506027] do_vmi_munmap+0x1f1/0x2b0 [ 25.506518] __vm_munmap+0x138/0x3a0 [ 25.507000] __x64_sys_munmap+0x59/0x80 [ 25.507503] do_syscall_64+0x3f/0x90 [ 25.507976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.508616] [ 25.508846] Second to last potentially related work creation: [ 25.509529] kasan_save_stack+0x22/0x50 [ 25.510034] __kasan_record_aux_stack+0x8e/0xa0 [ 25.510611] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.511265] remove_vma+0x139/0x170 [ 25.511716] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.512271] do_vmi_munmap+0x1f1/0x2b0 [ 25.512766] mmap_region+0x1f9/0x2660 [ 25.513247] do_mmap+0x854/0xf00 [ 25.513675] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.514162] ksys_mmap_pgoff+0x3af/0x500 [ 25.514676] do_syscall_64+0x3f/0x90 [ 25.515161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.515798] [ 25.516020] The buggy address belongs to the object at ffff88800d8e8bc8 [ 25.516020] which belongs to the cache vm_area_struct of size 168 [ 25.517572] The buggy address is located 88 bytes inside of [ 25.517572] freed 168-byte region [ffff88800d8e8bc8, ffff88800d8e8c70) [ 25.518991] [ 25.519214] The buggy address belongs to the physical page: [ 25.519872] page:00000000e03f5400 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8e8 [ 25.520962] memcg:ffff88800e113b01 [ 25.521387] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.522086] page_type: 0xffffffff() [ 25.522556] raw: 0100000000000200 ffff88800879fc80 ffffea00003b0ec0 dead000000000003 [ 25.523485] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e113b01 [ 25.524389] page dumped because: kasan: bad access detected [ 25.525053] [ 25.525273] Memory state around the buggy address: [ 25.525857] ffff88800d8e8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.526725] ffff88800d8e8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.527581] >ffff88800d8e8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.528445] ^ [ 25.528971] ffff88800d8e8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 25.529824] ffff88800d8e8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 25.530689] ================================================================== [ 25.531734] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.220342] BUG: Bad rss-counter state mm:000000002f62b2e0 type:MM_FILEPAGES val:33 [ 28.221343] BUG: Bad rss-counter state mm:000000002f62b2e0 type:MM_ANONPAGES val:22 [ 28.710161] BUG: Bad rss-counter state mm:00000000b2f85c0e type:MM_FILEPAGES val:33 [ 28.711852] BUG: Bad rss-counter state mm:00000000b2f85c0e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46616' (ECDSA) to the list of known hosts. 2023/06/20 07:20:35 fuzzer started 2023/06/20 07:20:35 dialing manager at localhost:44161 2023/06/20 07:20:35 checking machine... 2023/06/20 07:20:35 checking revisions... [ 29.493389] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:20:35 testing simple program... [ 29.545888] cgroup: Unknown subsys name 'net' [ 29.616074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:20:33 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f11f087b330 CR3=000000000e8a0000 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=3350869257ddfe87de448968049c798f XMM02=00000000001205f0eff9b2d0a8fce9cb XMM03=00000000001206c02c67c8bc2e329bc3 XMM04=78c02f999475418900000000000ae988 XMM05=dfcdbad4f1609c370000000000135150 XMM06=2d9b86d8d696ba240000000000134328 XMM07=e042d86d42eb936e00000000001245e0 XMM08=4d0796f3c46a0b2f00000000001206c0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff86137004 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff86137006 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09e68 R15=ffff88806cf09a98 RIP=ffffffff81131204 RFL=00000246 [---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 00007fa40871e900 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=00007ffd024b3000 CR3=000000001a3e0000 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