syzkaller login: [ 39.177363] BUG: Bad rss-counter state mm:00000000e8790fe7 type:MM_FILEPAGES val:33 [ 39.178023] BUG: Bad rss-counter state mm:00000000e8790fe7 type:MM_ANONPAGES val:22 [ 39.345258] ================================================================== [ 39.346188] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.347121] Read of size 8 at addr ffff88800f1a8880 by task sshd/219 [ 39.347985] [ 39.348192] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.348997] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.349917] Call Trace: [ 39.350235] [ 39.350506] dump_stack_lvl+0x91/0xf0 [ 39.350974] print_report+0xcc/0x620 [ 39.351435] ? __virt_addr_valid+0x102/0x340 [ 39.351954] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.352534] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.353115] kasan_report+0xbe/0xf0 [ 39.353593] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.354180] vma_interval_tree_remove+0xc75/0xec0 [ 39.354751] vma_prepare+0xc54/0x11a0 [ 39.355207] __split_vma+0x5af/0x950 [ 39.355652] ? __pfx___split_vma+0x10/0x10 [ 39.356149] ? find_held_lock+0x2c/0x110 [ 39.356643] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.357179] ? lock_is_held_type+0x9f/0x120 [ 39.357700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.358271] ? mtree_range_walk+0x632/0x900 [ 39.358798] ? mas_walk+0x5c7/0x7c0 [ 39.359245] do_vmi_munmap+0x1f1/0x2b0 [ 39.359714] mmap_region+0x1f9/0x2660 [ 39.360167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.360653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.361322] ? __pfx_lock_acquire+0x10/0x10 [ 39.361845] ? __pfx_mmap_region+0x10/0x10 [ 39.362347] ? security_mmap_addr+0x7d/0xa0 [ 39.362845] ? get_unmapped_area+0x1f5/0x3f0 [ 39.363370] do_mmap+0x854/0xf00 [ 39.363788] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.364252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.364783] ksys_mmap_pgoff+0x3af/0x500 [ 39.365260] do_syscall_64+0x3f/0x90 [ 39.365722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.366325] RIP: 0033:0x7f0107b2cd82 [ 39.366761] 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 [ 39.368755] RSP: 002b:00007ffd398e66e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.369622] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0107b2cd82 [ 39.370418] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0106f66000 [ 39.371211] RBP: 00007f0106f66000 R08: 0000000000000009 R09: 0000000000001000 [ 39.372016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562dc8c79ec0 [ 39.372812] R13: 00007ffd398e6700 R14: 00007ffd398e6730 R15: 00007ffd398e6a90 [ 39.373625] [ 39.373902] [ 39.374107] Allocated by task 212: [ 39.374508] kasan_save_stack+0x22/0x50 [ 39.374991] kasan_set_track+0x25/0x30 [ 39.375460] __kasan_slab_alloc+0x59/0x70 [ 39.375955] kmem_cache_alloc+0x16b/0x370 [ 39.376440] vm_area_dup+0x20/0x160 [ 39.376869] __split_vma+0x170/0x950 [ 39.377308] split_vma+0xc6/0x110 [ 39.377733] mprotect_fixup+0x8d2/0xb30 [ 39.378209] do_mprotect_pkey+0x87e/0xd40 [ 39.378697] __x64_sys_mprotect+0x78/0xc0 [ 39.379188] do_syscall_64+0x3f/0x90 [ 39.379637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.380244] [ 39.380448] Freed by task 212: [ 39.380824] kasan_save_stack+0x22/0x50 [ 39.381302] kasan_set_track+0x25/0x30 [ 39.381785] kasan_save_free_info+0x2b/0x50 [ 39.382284] __kasan_slab_free+0x10a/0x190 [ 39.382791] kmem_cache_free+0x10d/0x4d0 [ 39.383274] rcu_core+0x8c8/0x2860 [ 39.383696] __do_softirq+0x1b7/0x7d4 [ 39.384147] [ 39.384351] Last potentially related work creation: [ 39.384902] kasan_save_stack+0x22/0x50 [ 39.385374] __kasan_record_aux_stack+0x8e/0xa0 [ 39.385935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.386540] remove_vma+0x139/0x170 [ 39.386966] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.387490] do_vmi_munmap+0x1f1/0x2b0 [ 39.387949] __vm_munmap+0x138/0x3a0 [ 39.388392] __x64_sys_munmap+0x59/0x80 [ 39.388861] do_syscall_64+0x3f/0x90 [ 39.389307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.389928] [ 39.390132] The buggy address belongs to the object at ffff88800f1a8828 [ 39.390132] which belongs to the cache vm_area_struct of size 168 [ 39.391500] The buggy address is located 88 bytes inside of [ 39.391500] freed 168-byte region [ffff88800f1a8828, ffff88800f1a88d0) [ 39.392815] [ 39.393020] The buggy address belongs to the physical page: [ 39.393647] page:000000006cfaece2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1a8 [ 39.394667] memcg:ffff88800ec31d01 [ 39.395072] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.395684] page_type: 0xffffffff() [ 39.396113] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.396986] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec31d01 [ 39.397848] page dumped because: kasan: bad access detected [ 39.398473] [ 39.398685] Memory state around the buggy address: [ 39.399242] ffff88800f1a8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.400048] ffff88800f1a8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.400856] >ffff88800f1a8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.401688] ^ [ 39.402083] ffff88800f1a8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.402898] ffff88800f1a8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.403701] ================================================================== [ 39.404763] Disabling lock debugging due to kernel taint [ 41.220167] BUG: Bad rss-counter state mm:0000000032e09906 type:MM_FILEPAGES val:33 [ 41.220955] BUG: Bad rss-counter state mm:0000000032e09906 type:MM_ANONPAGES val:22 [ 41.597930] BUG: Bad rss-counter state mm:00000000fd49702a type:MM_FILEPAGES val:33 [ 41.598659] BUG: Bad rss-counter state mm:00000000fd49702a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57796' (ECDSA) to the list of known hosts. 2023/06/20 05:15:15 fuzzer started 2023/06/20 05:15:15 dialing manager at localhost:44161 2023/06/20 05:15:15 checking machine... 2023/06/20 05:15:15 checking revisions... [ 42.261405] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:15:15 testing simple program... [ 42.329057] cgroup: Unknown subsys name 'net' [ 42.433871] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:15:14 Registers: info registers vcpu 0 RAX=0000563d4c134050 RBX=0000563d4c12bd60 RCX=0000000000000081 RDX=0000000000000041 RSI=00007ffc989f0810 RDI=0000563d4c134050 RBP=00007ffc989f0810 RSP=00007ffc989f06a8 R8 =0000563d4c134050 R9 =00007f2a8eb6cbe0 R10=0000000000000008 R11=0000000000000000 R12=00000000ffffffff R13=00000000fffffffa R14=0000563d4c16dfd0 R15=0000000000000002 RIP=00007f2a8eb10b8f RFL=00000287 [--S--PC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2a8e1e3900 00000000 00000000 GS =0000 0000000000000000 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=00007fc3aa6c8650 CR3=000000000f7c8000 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=00000000000000000000000000000000 XMM02=00000000000000410000000000000038 XMM03=00656369767265732e6873732f656369 XMM04=6efffb366dc6b08900000000000ae988 XMM05=35fce9609801a45800000000001358f8 XMM06=806171799158d9670000000000134378 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007ffe33deccb8 CR3=0000000005482000 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=00007f9c61d115100000557558f8c790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000