syzkaller login: [ 34.226800] BUG: Bad rss-counter state mm:00000000bd6a6fcb type:MM_FILEPAGES val:33 [ 34.228260] BUG: Bad rss-counter state mm:00000000bd6a6fcb type:MM_ANONPAGES val:22 [ 34.403036] ================================================================== [ 34.404027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.405251] Read of size 8 at addr ffff88800e430968 by task sshd/219 [ 34.406090] [ 34.406325] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.407296] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.408412] Call Trace: [ 34.408771] [ 34.409092] dump_stack_lvl+0x91/0xf0 [ 34.409638] print_report+0xcc/0x620 [ 34.410184] ? __virt_addr_valid+0x102/0x340 [ 34.410805] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.411495] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.412212] kasan_report+0xbe/0xf0 [ 34.412745] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.413447] vma_interval_tree_remove+0xc75/0xec0 [ 34.414123] vma_prepare+0xc54/0x11a0 [ 34.414658] __split_vma+0x5af/0x950 [ 34.415201] ? __pfx___split_vma+0x10/0x10 [ 34.415794] ? find_held_lock+0x2c/0x110 [ 34.416395] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.417015] ? lock_is_held_type+0x9f/0x120 [ 34.417601] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.418266] ? mtree_range_walk+0x632/0x900 [ 34.418875] ? mas_walk+0x5c7/0x7c0 [ 34.419393] do_vmi_munmap+0x1f1/0x2b0 [ 34.419938] mmap_region+0x1f9/0x2660 [ 34.420479] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.421044] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.421828] ? __pfx_lock_acquire+0x10/0x10 [ 34.422406] ? __pfx_mmap_region+0x10/0x10 [ 34.422987] ? security_mmap_addr+0x7d/0xa0 [ 34.423569] ? get_unmapped_area+0x1f5/0x3f0 [ 34.424204] do_mmap+0x854/0xf00 [ 34.424696] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.425252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.425884] ksys_mmap_pgoff+0x3af/0x500 [ 34.426448] do_syscall_64+0x3f/0x90 [ 34.426983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.427707] RIP: 0033:0x7fc71dcefd82 [ 34.428233] 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 [ 34.430611] RSP: 002b:00007ffd9bbc5fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.431625] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc71dcefd82 [ 34.432578] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc71d129000 [ 34.433524] RBP: 00007fc71d129000 R08: 0000000000000009 R09: 0000000000001000 [ 34.434476] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e534342ec0 [ 34.435424] R13: 00007ffd9bbc5fc0 R14: 00007ffd9bbc5ff0 R15: 00007ffd9bbc6350 [ 34.436388] [ 34.436715] [ 34.436955] Allocated by task 211: [ 34.437427] kasan_save_stack+0x22/0x50 [ 34.437986] kasan_set_track+0x25/0x30 [ 34.438526] __kasan_slab_alloc+0x59/0x70 [ 34.439106] kmem_cache_alloc+0x16b/0x370 [ 34.439672] vm_area_dup+0x20/0x160 [ 34.440194] __split_vma+0x170/0x950 [ 34.440713] split_vma+0xc6/0x110 [ 34.441199] mprotect_fixup+0x8d2/0xb30 [ 34.441747] do_mprotect_pkey+0x87e/0xd40 [ 34.442312] __x64_sys_mprotect+0x78/0xc0 [ 34.442877] do_syscall_64+0x3f/0x90 [ 34.443390] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.444092] [ 34.444327] Freed by task 211: [ 34.444755] kasan_save_stack+0x22/0x50 [ 34.445365] kasan_set_track+0x25/0x30 [ 34.445897] kasan_save_free_info+0x2b/0x50 [ 34.446472] __kasan_slab_free+0x10a/0x190 [ 34.447043] kmem_cache_free+0x10d/0x4d0 [ 34.447592] rcu_core+0x8c8/0x2860 [ 34.448089] __do_softirq+0x1b7/0x7d4 [ 34.448601] [ 34.448837] Last potentially related work creation: [ 34.449471] kasan_save_stack+0x22/0x50 [ 34.450017] __kasan_record_aux_stack+0x8e/0xa0 [ 34.450638] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.451341] remove_vma+0x139/0x170 [ 34.451836] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.452461] do_vmi_munmap+0x1f1/0x2b0 [ 34.453001] __vm_munmap+0x138/0x3a0 [ 34.453511] __x64_sys_munmap+0x59/0x80 [ 34.454061] do_syscall_64+0x3f/0x90 [ 34.454579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.455283] [ 34.455520] The buggy address belongs to the object at ffff88800e430910 [ 34.455520] which belongs to the cache vm_area_struct of size 168 [ 34.457220] The buggy address is located 88 bytes inside of [ 34.457220] freed 168-byte region [ffff88800e430910, ffff88800e4309b8) [ 34.458827] [ 34.459077] The buggy address belongs to the physical page: [ 34.459836] page:0000000005dd21b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe430 [ 34.461095] memcg:ffff888009448c01 [ 34.461583] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.462319] page_type: 0xffffffff() [ 34.462828] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.463890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009448c01 [ 34.464943] page dumped because: kasan: bad access detected [ 34.465697] [ 34.465944] Memory state around the buggy address: [ 34.466609] ffff88800e430800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.467590] ffff88800e430880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.468572] >ffff88800e430900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.469555] ^ [ 34.470450] ffff88800e430980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.471430] ffff88800e430a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.472434] ================================================================== [ 34.473533] Disabling lock debugging due to kernel taint [ 36.425978] BUG: Bad rss-counter state mm:000000001d806e6a type:MM_FILEPAGES val:33 [ 36.426988] BUG: Bad rss-counter state mm:000000001d806e6a type:MM_ANONPAGES val:22 [ 36.879707] BUG: Bad rss-counter state mm:0000000042d44f9a type:MM_FILEPAGES val:33 [ 36.880803] BUG: Bad rss-counter state mm:0000000042d44f9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43372' (ECDSA) to the list of known hosts. 2023/06/20 03:42:38 fuzzer started 2023/06/20 03:42:38 dialing manager at localhost:44161 2023/06/20 03:42:38 checking machine... 2023/06/20 03:42:38 checking revisions... [ 37.598218] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:42:38 testing simple program... [ 37.643625] cgroup: Unknown subsys name 'net' [ 37.696387] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:42:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff84531da7 RCX=0000000000000001 RDX=1ffff1100d9c1359 RSI=ffff88806ce09f50 RDI=ffffffff84531da7 RBP=ffffffff84531da7 RSP=ffff88806ce09a18 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff8880196fd1c0 R15=ffff8880183e9780 RIP=ffffffff811fc6f7 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa9fb900900 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=00007fa9fbeb7618 CR3=000000000e01c000 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=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=00007f418a88c560 CR3=000000000d638000 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=e40d363428dfa0b6834c7ec7e02eddeb XMM02=000000000011cd80eff9b2d0a8fce9cb XMM03=000000000011ce502c67c8bc2e329bc3 XMM04=edf1db137281a61a00000000000ae988 XMM05=dfcdbad4f1609c370000000000133e80 XMM06=63609586f21341f80000000000132ce8 XMM07=e042d86d42eb936e0000000000124548 XMM08=6c81ee16d4cbbbff000000000011ce50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000