syzkaller login: [ 37.849283] BUG: Bad rss-counter state mm:000000003817233f type:MM_FILEPAGES val:33 [ 37.850505] BUG: Bad rss-counter state mm:000000003817233f type:MM_ANONPAGES val:22 [ 37.880400] ================================================================== [ 37.881178] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.881896] Read of size 8 at addr ffff88800c536b38 by task sshd/219 [ 37.882481] [ 37.882679] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.883335] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.884071] Call Trace: [ 37.884315] [ 37.884531] dump_stack_lvl+0x91/0xf0 [ 37.884899] print_report+0xcc/0x620 [ 37.885271] ? __virt_addr_valid+0x102/0x340 [ 37.885687] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.886152] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.886621] kasan_report+0xbe/0xf0 [ 37.886980] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.887452] vma_interval_tree_remove+0xc75/0xec0 [ 37.887908] vma_prepare+0xc54/0x11a0 [ 37.888272] __split_vma+0x5af/0x950 [ 37.888634] ? __pfx___split_vma+0x10/0x10 [ 37.889032] ? find_held_lock+0x2c/0x110 [ 37.889427] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.889854] ? lock_is_held_type+0x9f/0x120 [ 37.890264] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.890732] ? mtree_range_walk+0x632/0x900 [ 37.891153] ? mas_walk+0x5c7/0x7c0 [ 37.891519] do_vmi_munmap+0x1f1/0x2b0 [ 37.891896] mmap_region+0x1f9/0x2660 [ 37.892266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.892802] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.893358] ? __pfx_lock_acquire+0x10/0x10 [ 37.893768] ? __pfx_mmap_region+0x10/0x10 [ 37.894176] ? security_mmap_addr+0x7d/0xa0 [ 37.894599] ? get_unmapped_area+0x1f5/0x3f0 [ 37.895036] do_mmap+0x854/0xf00 [ 37.895371] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.895751] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.896183] ksys_mmap_pgoff+0x3af/0x500 [ 37.896571] do_syscall_64+0x3f/0x90 [ 37.896939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.897429] RIP: 0033:0x7f1d1fbe0d82 [ 37.897777] 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 [ 37.899424] RSP: 002b:00007ffd7e1b73a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.900114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d1fbe0d82 [ 37.900757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d1f01a000 [ 37.901409] RBP: 00007f1d1f01a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.902056] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569441fcec0 [ 37.902717] R13: 00007ffd7e1b73c0 R14: 00007ffd7e1b73f0 R15: 00007ffd7e1b7750 [ 37.903368] [ 37.903589] [ 37.903755] Allocated by task 212: [ 37.904082] kasan_save_stack+0x22/0x50 [ 37.904471] kasan_set_track+0x25/0x30 [ 37.904852] __kasan_slab_alloc+0x59/0x70 [ 37.905257] kmem_cache_alloc+0x16b/0x370 [ 37.905650] vm_area_dup+0x20/0x160 [ 37.905998] __split_vma+0x170/0x950 [ 37.906356] split_vma+0xc6/0x110 [ 37.906700] mprotect_fixup+0x8d2/0xb30 [ 37.907084] do_mprotect_pkey+0x87e/0xd40 [ 37.907479] __x64_sys_mprotect+0x78/0xc0 [ 37.907876] do_syscall_64+0x3f/0x90 [ 37.908235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.908725] [ 37.908887] Freed by task 212: [ 37.909195] kasan_save_stack+0x22/0x50 [ 37.909574] kasan_set_track+0x25/0x30 [ 37.909947] kasan_save_free_info+0x2b/0x50 [ 37.910350] __kasan_slab_free+0x10a/0x190 [ 37.910771] kmem_cache_free+0x10d/0x4d0 [ 37.911156] rcu_core+0x8c8/0x2860 [ 37.911497] __do_softirq+0x1b7/0x7d4 [ 37.911857] [ 37.912021] Last potentially related work creation: [ 37.912476] kasan_save_stack+0x22/0x50 [ 37.912856] __kasan_record_aux_stack+0x8e/0xa0 [ 37.913298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.913787] remove_vma+0x139/0x170 [ 37.914128] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.914548] do_vmi_munmap+0x1f1/0x2b0 [ 37.914925] __vm_munmap+0x138/0x3a0 [ 37.915288] __x64_sys_munmap+0x59/0x80 [ 37.915669] do_syscall_64+0x3f/0x90 [ 37.916027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.916519] [ 37.916685] Second to last potentially related work creation: [ 37.917210] kasan_save_stack+0x22/0x50 [ 37.917591] __kasan_record_aux_stack+0x8e/0xa0 [ 37.918024] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.918514] remove_vma+0x139/0x170 [ 37.918878] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.919304] do_vmi_munmap+0x1f1/0x2b0 [ 37.919676] mmap_region+0x1f9/0x2660 [ 37.920036] do_mmap+0x854/0xf00 [ 37.920365] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.920737] ksys_mmap_pgoff+0x3af/0x500 [ 37.921122] do_syscall_64+0x3f/0x90 [ 37.921485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.921967] [ 37.922130] The buggy address belongs to the object at ffff88800c536ae0 [ 37.922130] which belongs to the cache vm_area_struct of size 168 [ 37.923268] The buggy address is located 88 bytes inside of [ 37.923268] freed 168-byte region [ffff88800c536ae0, ffff88800c536b88) [ 37.924345] [ 37.924508] The buggy address belongs to the physical page: [ 37.925009] page:000000001cf454fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc536 [ 37.925830] memcg:ffff88800e2bf401 [ 37.926151] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.926685] page_type: 0xffffffff() [ 37.927027] raw: 0100000000000200 ffff88800879fc80 ffffea000036ea80 0000000000000005 [ 37.927722] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2bf401 [ 37.928411] page dumped because: kasan: bad access detected [ 37.928915] [ 37.929080] Memory state around the buggy address: [ 37.929519] ffff88800c536a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.930179] ffff88800c536a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 37.930848] >ffff88800c536b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.931503] ^ [ 37.931969] ffff88800c536b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 37.932623] ffff88800c536c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.933274] ================================================================== [ 37.934216] Disabling lock debugging due to kernel taint [ 39.956985] BUG: Bad rss-counter state mm:00000000bcecb1e3 type:MM_FILEPAGES val:33 [ 39.958448] BUG: Bad rss-counter state mm:00000000bcecb1e3 type:MM_ANONPAGES val:22 [ 40.429476] BUG: Bad rss-counter state mm:0000000014a21edc type:MM_FILEPAGES val:33 [ 40.430762] BUG: Bad rss-counter state mm:0000000014a21edc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41133' (ECDSA) to the list of known hosts. 2023/06/20 02:35:17 fuzzer started 2023/06/20 02:35:17 dialing manager at localhost:44161 2023/06/20 02:35:17 checking machine... 2023/06/20 02:35:17 checking revisions... [ 41.147865] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:35:17 testing simple program... [ 41.209676] cgroup: Unknown subsys name 'net' [ 41.261625] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:35:14 Registers: info registers vcpu 0 RAX=1ffffffff0bb1081 RBX=ffffffff85d88408 RCX=ffffffff810bd032 RDX=0000000000000000 RSI=ffffffff86088c1a RDI=ffffffff85d88408 RBP=ffffffff85d88408 RSP=ffff888015a378e0 R8 =ffffffff86088c1a R9 =ffff888015a37a28 R10=0000000000038001 R11=0000000000003c0d R12=ffffffff85d88408 R13=ffffffff85d88408 R14=ffffffff85d88408 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f08560a7900 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=00007f085665e618 CR3=000000000967e000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffd3fa8e7d8 CR3=0000000016f40000 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=2036313a35333a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35333a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000