syzkaller login: [ 30.796642] BUG: Bad rss-counter state mm:0000000019303e29 type:MM_FILEPAGES val:33 [ 30.797830] BUG: Bad rss-counter state mm:0000000019303e29 type:MM_ANONPAGES val:22 [ 30.836272] ================================================================== [ 30.837338] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.838527] Read of size 8 at addr ffff88800eb5ba50 by task sshd/219 [ 30.839442] [ 30.839662] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.840640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.841691] Call Trace: [ 30.842062] [ 30.842417] dump_stack_lvl+0x91/0xf0 [ 30.842988] print_report+0xcc/0x620 [ 30.843480] ? __virt_addr_valid+0x102/0x340 [ 30.844047] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844691] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.845317] kasan_report+0xbe/0xf0 [ 30.845801] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.846432] vma_interval_tree_remove+0xc75/0xec0 [ 30.847042] vma_prepare+0xc54/0x11a0 [ 30.847533] __split_vma+0x5af/0x950 [ 30.848008] ? __pfx___split_vma+0x10/0x10 [ 30.848547] ? find_held_lock+0x2c/0x110 [ 30.849088] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.849672] ? lock_is_held_type+0x9f/0x120 [ 30.850220] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.850847] ? mtree_range_walk+0x632/0x900 [ 30.851404] ? mas_walk+0x5c7/0x7c0 [ 30.851888] do_vmi_munmap+0x1f1/0x2b0 [ 30.852388] mmap_region+0x1f9/0x2660 [ 30.852899] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.853420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.854145] ? __pfx_lock_acquire+0x10/0x10 [ 30.854676] ? __pfx_mmap_region+0x10/0x10 [ 30.855211] ? security_mmap_addr+0x7d/0xa0 [ 30.855748] ? get_unmapped_area+0x1f5/0x3f0 [ 30.856307] do_mmap+0x854/0xf00 [ 30.856763] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.857264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.857840] ksys_mmap_pgoff+0x3af/0x500 [ 30.858350] do_syscall_64+0x3f/0x90 [ 30.858835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859490] RIP: 0033:0x7f1620b21d82 [ 30.859960] 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 [ 30.862146] RSP: 002b:00007ffcb33c9678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.863059] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1620b21d82 [ 30.863916] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f161ff5b000 [ 30.864786] RBP: 00007f161ff5b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.865639] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617ff655ec0 [ 30.866505] R13: 00007ffcb33c9690 R14: 00007ffcb33c96c0 R15: 00007ffcb33c9a20 [ 30.867371] [ 30.867668] [ 30.867889] Allocated by task 212: [ 30.868327] kasan_save_stack+0x22/0x50 [ 30.868851] kasan_set_track+0x25/0x30 [ 30.869360] __kasan_slab_alloc+0x59/0x70 [ 30.869896] kmem_cache_alloc+0x16b/0x370 [ 30.870427] vm_area_dup+0x20/0x160 [ 30.870889] __split_vma+0x170/0x950 [ 30.871365] split_vma+0xc6/0x110 [ 30.871819] mprotect_fixup+0x8d2/0xb30 [ 30.872324] do_mprotect_pkey+0x87e/0xd40 [ 30.872870] __x64_sys_mprotect+0x78/0xc0 [ 30.873409] do_syscall_64+0x3f/0x90 [ 30.873886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874545] [ 30.874767] Freed by task 212: [ 30.875168] kasan_save_stack+0x22/0x50 [ 30.875686] kasan_set_track+0x25/0x30 [ 30.876187] kasan_save_free_info+0x2b/0x50 [ 30.876738] __kasan_slab_free+0x10a/0x190 [ 30.877324] kmem_cache_free+0x10d/0x4d0 [ 30.877843] rcu_core+0x8c8/0x2860 [ 30.878296] __do_softirq+0x1b7/0x7d4 [ 30.878787] [ 30.879011] Last potentially related work creation: [ 30.879604] kasan_save_stack+0x22/0x50 [ 30.880112] __kasan_record_aux_stack+0x8e/0xa0 [ 30.880715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.881374] remove_vma+0x139/0x170 [ 30.881833] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.882398] do_vmi_munmap+0x1f1/0x2b0 [ 30.882890] __vm_munmap+0x138/0x3a0 [ 30.883362] __x64_sys_munmap+0x59/0x80 [ 30.883864] do_syscall_64+0x3f/0x90 [ 30.884341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885001] [ 30.885222] The buggy address belongs to the object at ffff88800eb5b9f8 [ 30.885222] which belongs to the cache vm_area_struct of size 168 [ 30.886716] The buggy address is located 88 bytes inside of [ 30.886716] freed 168-byte region [ffff88800eb5b9f8, ffff88800eb5baa0) [ 30.888129] [ 30.888354] The buggy address belongs to the physical page: [ 30.889033] page:000000007631731b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb5b [ 30.890113] memcg:ffff88800ee93201 [ 30.890550] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.891201] page_type: 0xffffffff() [ 30.891657] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.892578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee93201 [ 30.893530] page dumped because: kasan: bad access detected [ 30.894196] [ 30.894421] Memory state around the buggy address: [ 30.894999] ffff88800eb5b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.895856] ffff88800eb5b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.896731] >ffff88800eb5ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.897582] ^ [ 30.898297] ffff88800eb5ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.899170] ffff88800eb5bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900036] ================================================================== [ 30.901022] Disabling lock debugging due to kernel taint [ 33.171317] BUG: Bad rss-counter state mm:0000000092b2794f type:MM_FILEPAGES val:33 [ 33.172463] BUG: Bad rss-counter state mm:0000000092b2794f type:MM_ANONPAGES val:22 [ 33.656722] BUG: Bad rss-counter state mm:00000000a4b2ba52 type:MM_FILEPAGES val:33 [ 33.657979] BUG: Bad rss-counter state mm:00000000a4b2ba52 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13024' (ECDSA) to the list of known hosts. 2023/06/20 10:12:59 fuzzer started 2023/06/20 10:12:59 dialing manager at localhost:44161 2023/06/20 10:12:59 checking machine... 2023/06/20 10:12:59 checking revisions... [ 34.338752] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:12:59 testing simple program... [ 34.393141] cgroup: Unknown subsys name 'net' [ 34.437247] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:12:59 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff88800d99f888 RDX=1ffff11001b33f08 RSI=ffffffff813ad6d0 RDI=ffff88800d99f8b0 RBP=ffff88800d99f880 RSP=ffff88800d99f7e0 R8 =0000000000000001 R9 =ffff88800d99f828 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800d99f8b0 R13=0000000000000000 R14=ffff888015ba51c0 R15=0000000000092cc0 RIP=ffffffff813ad420 RFL=00000282 [--S----] 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 00007fb96f2d5900 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=00007fb96f88d0b0 CR3=000000000c7ee000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f6239236fb0 CR3=00000000102e0000 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=440ed11bfd00ce96dc4b200bb78e9784 XMM02=000000000011dfa8eff9b2d0a8fce9cb XMM03=000000000011e0782c67c8bc2e329bc3 XMM04=4864282fdbde2c7600000000000ae988 XMM05=dfcdbad4f1609c370000000000134480 XMM06=6dde8a341b01d14e00000000001332e8 XMM07=e042d86d42eb936e0000000000124b60 XMM08=66c83869db864b07000000000011e078 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000