[ 24.308887] BUG: Bad rss-counter state mm:0000000088dd7e64 type:MM_FILEPAGES val:33 [ 24.310191] BUG: Bad rss-counter state mm:0000000088dd7e64 type:MM_ANONPAGES val:22 [ 24.484438] ================================================================== [ 24.485544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.486595] Read of size 8 at addr ffff8880195d8ed8 by task sshd/218 [ 24.487563] [ 24.487803] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.488772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.489880] Call Trace: [ 24.490233] [ 24.490550] dump_stack_lvl+0x91/0xf0 [ 24.491093] print_report+0xcc/0x620 [ 24.491630] ? __virt_addr_valid+0x102/0x340 [ 24.492266] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.492949] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.493627] kasan_report+0xbe/0xf0 [ 24.494157] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.494841] vma_interval_tree_remove+0xc75/0xec0 [ 24.495511] vma_prepare+0xc54/0x11a0 [ 24.496038] __split_vma+0x5af/0x950 [ 24.496567] ? __pfx___split_vma+0x10/0x10 [ 24.497158] ? find_held_lock+0x2c/0x110 [ 24.497729] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.498345] ? lock_is_held_type+0x9f/0x120 [ 24.498938] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.499606] ? mtree_range_walk+0x632/0x900 [ 24.500225] ? mas_walk+0x5c7/0x7c0 [ 24.500751] do_vmi_munmap+0x1f1/0x2b0 [ 24.501292] mmap_region+0x1f9/0x2660 [ 24.501822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.502381] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.503171] ? __pfx_lock_acquire+0x10/0x10 [ 24.503759] ? __pfx_mmap_region+0x10/0x10 [ 24.504365] ? security_mmap_addr+0x7d/0xa0 [ 24.504951] ? get_unmapped_area+0x1f5/0x3f0 [ 24.505561] do_mmap+0x854/0xf00 [ 24.506046] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.506586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.507211] ksys_mmap_pgoff+0x3af/0x500 [ 24.507774] do_syscall_64+0x3f/0x90 [ 24.508316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.509027] RIP: 0033:0x7fec2ba00d82 [ 24.509526] 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 [ 24.511876] RSP: 002b:00007ffc6b9e3c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.512828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec2ba00d82 [ 24.513680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec2ae3a000 [ 24.514529] RBP: 00007fec2ae3a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.515376] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d2b9482ec0 [ 24.516243] R13: 00007ffc6b9e3c80 R14: 00007ffc6b9e3cb0 R15: 00007ffc6b9e4010 [ 24.517105] [ 24.517400] [ 24.517622] Allocated by task 211: [ 24.518056] kasan_save_stack+0x22/0x50 [ 24.518565] kasan_set_track+0x25/0x30 [ 24.519064] __kasan_slab_alloc+0x59/0x70 [ 24.519592] kmem_cache_alloc+0x16b/0x370 [ 24.520113] vm_area_dup+0x20/0x160 [ 24.520580] __split_vma+0x170/0x950 [ 24.521057] split_vma+0xc6/0x110 [ 24.521499] mprotect_fixup+0x8d2/0xb30 [ 24.522016] do_mprotect_pkey+0x87e/0xd40 [ 24.522550] __x64_sys_mprotect+0x78/0xc0 [ 24.523099] do_syscall_64+0x3f/0x90 [ 24.523596] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.524284] [ 24.524519] Freed by task 211: [ 24.524941] kasan_save_stack+0x22/0x50 [ 24.525470] kasan_set_track+0x25/0x30 [ 24.526000] kasan_save_free_info+0x2b/0x50 [ 24.526563] __kasan_slab_free+0x10a/0x190 [ 24.527138] kmem_cache_free+0x10d/0x4d0 [ 24.527678] rcu_core+0x8c8/0x2860 [ 24.528149] __do_softirq+0x1b7/0x7d4 [ 24.528676] [ 24.528906] Last potentially related work creation: [ 24.529529] kasan_save_stack+0x22/0x50 [ 24.530057] __kasan_record_aux_stack+0x8e/0xa0 [ 24.530655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.531341] remove_vma+0x139/0x170 [ 24.531823] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.532426] do_vmi_munmap+0x1f1/0x2b0 [ 24.532948] __vm_munmap+0x138/0x3a0 [ 24.533442] __x64_sys_munmap+0x59/0x80 [ 24.533972] do_syscall_64+0x3f/0x90 [ 24.534483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.535161] [ 24.535386] Second to last potentially related work creation: [ 24.536116] kasan_save_stack+0x22/0x50 [ 24.536670] __kasan_record_aux_stack+0x8e/0xa0 [ 24.537281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.537969] remove_vma+0x139/0x170 [ 24.538444] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.539039] do_vmi_munmap+0x1f1/0x2b0 [ 24.539561] mmap_region+0x1f9/0x2660 [ 24.540066] do_mmap+0x854/0xf00 [ 24.540533] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.541053] ksys_mmap_pgoff+0x3af/0x500 [ 24.541588] do_syscall_64+0x3f/0x90 [ 24.542092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.542781] [ 24.543013] The buggy address belongs to the object at ffff8880195d8e80 [ 24.543013] which belongs to the cache vm_area_struct of size 168 [ 24.544585] The buggy address is located 88 bytes inside of [ 24.544585] freed 168-byte region [ffff8880195d8e80, ffff8880195d8f28) [ 24.546067] [ 24.546297] The buggy address belongs to the physical page: [ 24.547000] page:00000000ff1ff4a6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x195d8 [ 24.548180] memcg:ffff888018c3f501 [ 24.548642] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.549328] page_type: 0xffffffff() [ 24.549812] raw: 0100000000000200 ffff88800879fc80 ffffea00002681c0 dead000000000004 [ 24.550776] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c3f501 [ 24.551740] page dumped because: kasan: bad access detected [ 24.552452] [ 24.552677] Memory state around the buggy address: [ 24.553293] ffff8880195d8d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.554209] ffff8880195d8e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.555116] >ffff8880195d8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.556022] ^ [ 24.556822] ffff8880195d8f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.557728] ffff8880195d8f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.558629] ================================================================== [ 24.559840] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.400590] BUG: Bad rss-counter state mm:0000000071e577eb type:MM_FILEPAGES val:33 [ 26.402218] BUG: Bad rss-counter state mm:0000000071e577eb type:MM_ANONPAGES val:22 [ 26.832704] BUG: Bad rss-counter state mm:00000000018bb351 type:MM_FILEPAGES val:33 [ 26.833853] BUG: Bad rss-counter state mm:00000000018bb351 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15582' (ECDSA) to the list of known hosts. 2023/06/19 17:34:30 fuzzer started 2023/06/19 17:34:30 dialing manager at localhost:44161 2023/06/19 17:34:30 checking machine... 2023/06/19 17:34:30 checking revisions... [ 27.504558] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:34:30 testing simple program... [ 27.544493] cgroup: Unknown subsys name 'net' [ 27.579616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:34:29 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=00007fa487ddd600 CR3=00000000147dc000 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=2030333a34333a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a34333a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff83642d12 RCX=0000000000000001 RDX=1ffff11002b80e7c RSI=ffff888015c07c80 RDI=ffffffff83642d12 RBP=ffffffff83642d12 RSP=ffff888015c07338 R8 =0000000000000001 R9 =ffff888015c073c8 R10=0000000000038001 R11=000000000008a85c R12=0000000000000001 R13=0000000000000000 R14=ffff88801659d1c0 R15=00000000000128c0 RIP=ffffffff811fc772 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 00007fd5507d9900 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=00007fd550d90618 CR3=000000000ead8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000