syzkaller login: [ 33.647897] BUG: Bad rss-counter state mm:00000000fbf2e820 type:MM_FILEPAGES val:33 [ 33.648738] BUG: Bad rss-counter state mm:00000000fbf2e820 type:MM_ANONPAGES val:22 [ 33.812049] ================================================================== [ 33.813012] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.814001] Read of size 8 at addr ffff88800fe7d058 by task sshd/220 [ 33.814988] [ 33.815232] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.816120] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.817131] Call Trace: [ 33.817486] [ 33.817782] dump_stack_lvl+0x91/0xf0 [ 33.818289] print_report+0xcc/0x620 [ 33.818793] ? __virt_addr_valid+0x102/0x340 [ 33.819374] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.820019] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.820671] kasan_report+0xbe/0xf0 [ 33.821174] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.821835] vma_interval_tree_remove+0xc75/0xec0 [ 33.822463] vma_prepare+0xc54/0x11a0 [ 33.822962] __split_vma+0x5af/0x950 [ 33.823461] ? __pfx___split_vma+0x10/0x10 [ 33.824014] ? find_held_lock+0x2c/0x110 [ 33.824564] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.825157] ? lock_is_held_type+0x9f/0x120 [ 33.825733] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.826367] ? mtree_range_walk+0x632/0x900 [ 33.826927] ? mas_walk+0x5c7/0x7c0 [ 33.827399] do_vmi_munmap+0x1f1/0x2b0 [ 33.827889] mmap_region+0x1f9/0x2660 [ 33.828370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.828884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.829610] ? __pfx_lock_acquire+0x10/0x10 [ 33.830142] ? __pfx_mmap_region+0x10/0x10 [ 33.830671] ? security_mmap_addr+0x7d/0xa0 [ 33.831210] ? get_unmapped_area+0x1f5/0x3f0 [ 33.831758] do_mmap+0x854/0xf00 [ 33.832197] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.832687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.833244] ksys_mmap_pgoff+0x3af/0x500 [ 33.833768] do_syscall_64+0x3f/0x90 [ 33.834250] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.834897] RIP: 0033:0x7ff410cf1d82 [ 33.835360] 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 [ 33.837617] RSP: 002b:00007ffd12767db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.838567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff410cf1d82 [ 33.839453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff41012b000 [ 33.840349] RBP: 00007ff41012b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.841238] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558b0acfbec0 [ 33.842128] R13: 00007ffd12767dd0 R14: 00007ffd12767e00 R15: 00007ffd12768160 [ 33.843020] [ 33.843327] [ 33.843547] Allocated by task 213: [ 33.843988] kasan_save_stack+0x22/0x50 [ 33.844519] kasan_set_track+0x25/0x30 [ 33.845032] __kasan_slab_alloc+0x59/0x70 [ 33.845589] kmem_cache_alloc+0x16b/0x370 [ 33.846128] vm_area_dup+0x20/0x160 [ 33.846596] __split_vma+0x170/0x950 [ 33.847088] split_vma+0xc6/0x110 [ 33.847542] mprotect_fixup+0x8d2/0xb30 [ 33.848059] do_mprotect_pkey+0x87e/0xd40 [ 33.848600] __x64_sys_mprotect+0x78/0xc0 [ 33.849139] do_syscall_64+0x3f/0x90 [ 33.849639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.850313] [ 33.850536] Freed by task 203: [ 33.850950] kasan_save_stack+0x22/0x50 [ 33.851466] kasan_set_track+0x25/0x30 [ 33.851981] kasan_save_free_info+0x2b/0x50 [ 33.852541] __kasan_slab_free+0x10a/0x190 [ 33.853097] kmem_cache_free+0x10d/0x4d0 [ 33.853639] rcu_core+0x8c8/0x2860 [ 33.854104] __do_softirq+0x1b7/0x7d4 [ 33.854594] [ 33.854815] Last potentially related work creation: [ 33.855424] kasan_save_stack+0x22/0x50 [ 33.855947] __kasan_record_aux_stack+0x8e/0xa0 [ 33.856629] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.857306] remove_vma+0x139/0x170 [ 33.857787] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.858374] do_vmi_munmap+0x1f1/0x2b0 [ 33.858879] __vm_munmap+0x138/0x3a0 [ 33.859370] __x64_sys_munmap+0x59/0x80 [ 33.859890] do_syscall_64+0x3f/0x90 [ 33.860387] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.861047] [ 33.861265] The buggy address belongs to the object at ffff88800fe7d000 [ 33.861265] which belongs to the cache vm_area_struct of size 168 [ 33.862821] The buggy address is located 88 bytes inside of [ 33.862821] freed 168-byte region [ffff88800fe7d000, ffff88800fe7d0a8) [ 33.864271] [ 33.864498] The buggy address belongs to the physical page: [ 33.865192] page:000000007c898562 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe7d [ 33.866321] memcg:ffff888016fc4501 [ 33.866763] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.867493] page_type: 0xffffffff() [ 33.867958] raw: 0100000000000200 ffff88800879fc80 ffffea00003f69c0 dead000000000007 [ 33.868932] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fc4501 [ 33.869888] page dumped because: kasan: bad access detected [ 33.870582] [ 33.870803] Memory state around the buggy address: [ 33.871407] ffff88800fe7cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 33.872304] ffff88800fe7cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 33.873204] >ffff88800fe7d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.874094] ^ [ 33.874858] ffff88800fe7d080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 33.875750] ffff88800fe7d100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.876642] ================================================================== [ 33.877614] Disabling lock debugging due to kernel taint [ 35.958322] BUG: Bad rss-counter state mm:00000000fe921042 type:MM_FILEPAGES val:33 [ 35.959299] BUG: Bad rss-counter state mm:00000000fe921042 type:MM_ANONPAGES val:22 [ 36.418110] BUG: Bad rss-counter state mm:0000000055db2e55 type:MM_FILEPAGES val:33 [ 36.419288] BUG: Bad rss-counter state mm:0000000055db2e55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57453' (ECDSA) to the list of known hosts. 2023/06/19 16:42:57 fuzzer started 2023/06/19 16:42:57 dialing manager at localhost:44161 2023/06/19 16:42:57 checking machine... 2023/06/19 16:42:57 checking revisions... [ 37.145336] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:42:57 testing simple program... [ 37.198514] cgroup: Unknown subsys name 'net' [ 37.251879] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:54 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff1100d9c135e RSI=ffffffff8180f43b RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff86137542 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016f0d1c0 R15=ffff8880180ee0b8 RIP=ffffffff813ad42e 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 00007fa11c959900 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=00007ffd923ae000 CR3=0000000018264000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007fc755427c50 CR3=000000000c9ee000 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=e1176516c37e10af534151120a2bc7ea XMM02=2c67c8bc2e329bc3000000000011efe0 XMM03=fb795ef6d65770560000000000125dc0 XMM04=f4e2c72aa16099d000000000000ae988 XMM05=19e9129bd510f2350000000000135968 XMM06=a8407c8d964dad0300000000001347d0 XMM07=e042d86d42eb936e0000000000126040 XMM08=be3e392ab5fa9ed2000000000011f040 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000