syzkaller login: [ 34.679680] BUG: Bad rss-counter state mm:00000000df576f67 type:MM_FILEPAGES val:33 [ 34.681619] BUG: Bad rss-counter state mm:00000000df576f67 type:MM_ANONPAGES val:22 [ 34.845357] ================================================================== [ 34.846260] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.847211] Read of size 8 at addr ffff88801aafba50 by task sshd/222 [ 34.847997] [ 34.848218] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.849214] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.850183] Call Trace: [ 34.850513] [ 34.850801] dump_stack_lvl+0x91/0xf0 [ 34.851303] print_report+0xcc/0x620 [ 34.851792] ? __virt_addr_valid+0x102/0x340 [ 34.852355] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.852981] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.853594] kasan_report+0xbe/0xf0 [ 34.854061] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.854692] vma_interval_tree_remove+0xc75/0xec0 [ 34.855287] vma_prepare+0xc54/0x11a0 [ 34.855758] __split_vma+0x5af/0x950 [ 34.856226] ? __pfx___split_vma+0x10/0x10 [ 34.856764] ? find_held_lock+0x2c/0x110 [ 34.857279] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.857840] ? lock_is_held_type+0x9f/0x120 [ 34.858384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.858981] ? mtree_range_walk+0x632/0x900 [ 34.859521] ? mas_walk+0x5c7/0x7c0 [ 34.859989] do_vmi_munmap+0x1f1/0x2b0 [ 34.860494] mmap_region+0x1f9/0x2660 [ 34.860969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.861497] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.862233] ? __pfx_lock_acquire+0x10/0x10 [ 34.862762] ? __pfx_mmap_region+0x10/0x10 [ 34.863292] ? security_mmap_addr+0x7d/0xa0 [ 34.863824] ? get_unmapped_area+0x1f5/0x3f0 [ 34.864390] do_mmap+0x854/0xf00 [ 34.864845] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.865342] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.865911] ksys_mmap_pgoff+0x3af/0x500 [ 34.866435] do_syscall_64+0x3f/0x90 [ 34.866920] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.867560] RIP: 0033:0x7fae90987d82 [ 34.868013] 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 [ 34.870175] RSP: 002b:00007ffc65eff3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.871079] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae90987d82 [ 34.871919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae8fdc1000 [ 34.872756] RBP: 00007fae8fdc1000 R08: 0000000000000009 R09: 0000000000001000 [ 34.873584] R10: 0000000000000812 R11: 0000000000000206 R12: 000055847ae8ed90 [ 34.874414] R13: 00007ffc65eff400 R14: 00007ffc65eff430 R15: 00007ffc65eff790 [ 34.875263] [ 34.875550] [ 34.875763] Allocated by task 215: [ 34.876186] kasan_save_stack+0x22/0x50 [ 34.876700] kasan_set_track+0x25/0x30 [ 34.877194] __kasan_slab_alloc+0x59/0x70 [ 34.877715] kmem_cache_alloc+0x16b/0x370 [ 34.878236] vm_area_dup+0x20/0x160 [ 34.878699] __split_vma+0x170/0x950 [ 34.879170] split_vma+0xc6/0x110 [ 34.879619] mprotect_fixup+0x8d2/0xb30 [ 34.880119] do_mprotect_pkey+0x87e/0xd40 [ 34.880668] __x64_sys_mprotect+0x78/0xc0 [ 34.881199] do_syscall_64+0x3f/0x90 [ 34.881680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.882322] [ 34.882539] Freed by task 215: [ 34.882931] kasan_save_stack+0x22/0x50 [ 34.883428] kasan_set_track+0x25/0x30 [ 34.883923] kasan_save_free_info+0x2b/0x50 [ 34.884454] __kasan_slab_free+0x10a/0x190 [ 34.884991] kmem_cache_free+0x10d/0x4d0 [ 34.885506] rcu_core+0x8c8/0x2860 [ 34.885954] __do_softirq+0x1b7/0x7d4 [ 34.886430] [ 34.886652] Last potentially related work creation: [ 34.887241] kasan_save_stack+0x22/0x50 [ 34.887749] __kasan_record_aux_stack+0x8e/0xa0 [ 34.888346] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.888991] remove_vma+0x139/0x170 [ 34.889435] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.889990] do_vmi_munmap+0x1f1/0x2b0 [ 34.890468] __vm_munmap+0x138/0x3a0 [ 34.890931] __x64_sys_munmap+0x59/0x80 [ 34.891425] do_syscall_64+0x3f/0x90 [ 34.891897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.892547] [ 34.892764] The buggy address belongs to the object at ffff88801aafb9f8 [ 34.892764] which belongs to the cache vm_area_struct of size 168 [ 34.894227] The buggy address is located 88 bytes inside of [ 34.894227] freed 168-byte region [ffff88801aafb9f8, ffff88801aafbaa0) [ 34.895626] [ 34.895842] The buggy address belongs to the physical page: [ 34.896519] page:000000002a33d709 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1aafb [ 34.897599] memcg:ffff88801aafc001 [ 34.898026] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.898669] page_type: 0xffffffff() [ 34.899112] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.900028] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aafc001 [ 34.900941] page dumped because: kasan: bad access detected [ 34.901598] [ 34.901813] Memory state around the buggy address: [ 34.902405] ffff88801aafb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.903281] ffff88801aafb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 34.904173] >ffff88801aafba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.905061] ^ [ 34.905789] ffff88801aafba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 34.906645] ffff88801aafbb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.907534] ================================================================== [ 34.908524] Disabling lock debugging due to kernel taint [ 36.842619] BUG: Bad rss-counter state mm:00000000432682fd type:MM_FILEPAGES val:33 [ 36.844255] BUG: Bad rss-counter state mm:00000000432682fd type:MM_ANONPAGES val:22 [ 37.433822] BUG: Bad rss-counter state mm:0000000020441cee type:MM_FILEPAGES val:33 [ 37.434982] BUG: Bad rss-counter state mm:0000000020441cee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59675' (ECDSA) to the list of known hosts. 2023/06/20 06:16:47 fuzzer started 2023/06/20 06:16:47 dialing manager at localhost:44161 2023/06/20 06:16:47 checking machine... 2023/06/20 06:16:47 checking revisions... [ 38.094820] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:16:47 testing simple program... [ 38.133123] cgroup: Unknown subsys name 'net' [ 38.174489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:16:43 Registers: info registers vcpu 0 RAX=ffffffff8180cd09 RBX=0000000000000002 RCX=0000000000000001 RDX=0000000000092c40 RSI=0000000000000014 RDI=ffff8880147075b0 RBP=dffffc0000000000 RSP=ffff888014707510 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000014 R13=0000000000092c40 R14=ffff8880147075a0 R15=0000000000092c40 RIP=ffffffff813ad5cf 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd791b98900 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=00007fd79102d7e0 CR3=000000000d7e6000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7431999f86ddf37500000000000ae988 XMM05=9cd9e1f98932f1ab0000000000135bc0 XMM06=59d5b690e0af863b0000000000134a58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf943 RBX=ffffffff85dfca1c RCX=ffffffff8180c521 RDX=0000000000000000 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff88806cf099e0 R8 =ffffffff86137508 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca3c R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fe61df05900 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=00007fe61e4bc618 CR3=000000000e762000 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