syzkaller login: [ 30.614873] BUG: Bad rss-counter state mm:000000007d3afac9 type:MM_FILEPAGES val:33 [ 30.616164] BUG: Bad rss-counter state mm:000000007d3afac9 type:MM_ANONPAGES val:22 [ 30.733890] ================================================================== [ 30.734450] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.735017] Read of size 8 at addr ffff88800e7e9968 by task sshd/220 [ 30.735474] [ 30.735604] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.736410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737011] Call Trace: [ 30.737202] [ 30.737370] dump_stack_lvl+0x91/0xf0 [ 30.737657] print_report+0xcc/0x620 [ 30.737948] ? __virt_addr_valid+0x102/0x340 [ 30.738270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.738652] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739018] kasan_report+0xbe/0xf0 [ 30.739302] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739666] vma_interval_tree_remove+0xc75/0xec0 [ 30.740015] vma_prepare+0xc54/0x11a0 [ 30.740300] __split_vma+0x5af/0x950 [ 30.740578] ? __pfx___split_vma+0x10/0x10 [ 30.740893] ? find_held_lock+0x2c/0x110 [ 30.741209] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.741543] ? lock_is_held_type+0x9f/0x120 [ 30.741862] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.742220] ? mtree_range_walk+0x632/0x900 [ 30.742554] ? mas_walk+0x5c7/0x7c0 [ 30.742834] do_vmi_munmap+0x1f1/0x2b0 [ 30.743121] mmap_region+0x1f9/0x2660 [ 30.743402] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.743704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.744146] ? __pfx_lock_acquire+0x10/0x10 [ 30.744478] ? __pfx_mmap_region+0x10/0x10 [ 30.744825] ? security_mmap_addr+0x7d/0xa0 [ 30.745166] ? get_unmapped_area+0x1f5/0x3f0 [ 30.745509] do_mmap+0x854/0xf00 [ 30.745785] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.746090] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.746447] ksys_mmap_pgoff+0x3af/0x500 [ 30.746767] do_syscall_64+0x3f/0x90 [ 30.747074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.747478] RIP: 0033:0x7f313e49bd82 [ 30.747765] 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 [ 30.749133] RSP: 002b:00007ffd94e83378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.749697] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f313e49bd82 [ 30.750238] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f313d8d5000 [ 30.750769] RBP: 00007f313d8d5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.751305] R10: 0000000000000812 R11: 0000000000000206 R12: 00005626249e1ec0 [ 30.751821] R13: 00007ffd94e83390 R14: 00007ffd94e833c0 R15: 00007ffd94e83720 [ 30.752362] [ 30.752536] [ 30.752677] Allocated by task 213: [ 30.752944] kasan_save_stack+0x22/0x50 [ 30.753263] kasan_set_track+0x25/0x30 [ 30.753564] __kasan_slab_alloc+0x59/0x70 [ 30.753886] kmem_cache_alloc+0x16b/0x370 [ 30.754217] vm_area_dup+0x20/0x160 [ 30.754499] __split_vma+0x170/0x950 [ 30.754792] split_vma+0xc6/0x110 [ 30.755069] mprotect_fixup+0x8d2/0xb30 [ 30.755387] do_mprotect_pkey+0x87e/0xd40 [ 30.755706] __x64_sys_mprotect+0x78/0xc0 [ 30.756038] do_syscall_64+0x3f/0x90 [ 30.756333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.756734] [ 30.756865] Freed by task 203: [ 30.757115] kasan_save_stack+0x22/0x50 [ 30.757435] kasan_set_track+0x25/0x30 [ 30.757741] kasan_save_free_info+0x2b/0x50 [ 30.758083] __kasan_slab_free+0x10a/0x190 [ 30.758420] kmem_cache_free+0x10d/0x4d0 [ 30.758742] rcu_core+0x8c8/0x2860 [ 30.759021] __do_softirq+0x1b7/0x7d4 [ 30.759331] [ 30.759458] Last potentially related work creation: [ 30.759829] kasan_save_stack+0x22/0x50 [ 30.760128] __kasan_record_aux_stack+0x8e/0xa0 [ 30.760460] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.760856] remove_vma+0x139/0x170 [ 30.761120] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.761444] do_vmi_munmap+0x1f1/0x2b0 [ 30.761725] __vm_munmap+0x138/0x3a0 [ 30.762000] __x64_sys_munmap+0x59/0x80 [ 30.762308] do_syscall_64+0x3f/0x90 [ 30.762585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.762989] [ 30.763122] The buggy address belongs to the object at ffff88800e7e9910 [ 30.763122] which belongs to the cache vm_area_struct of size 168 [ 30.764031] The buggy address is located 88 bytes inside of [ 30.764031] freed 168-byte region [ffff88800e7e9910, ffff88800e7e99b8) [ 30.764900] [ 30.765031] The buggy address belongs to the physical page: [ 30.765441] page:0000000056effca2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7e9 [ 30.766138] memcg:ffff888019982f01 [ 30.766406] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.766811] page_type: 0xffffffff() [ 30.767100] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.767672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019982f01 [ 30.768245] page dumped because: kasan: bad access detected [ 30.768666] [ 30.768797] Memory state around the buggy address: [ 30.769168] ffff88800e7e9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.769703] ffff88800e7e9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.770230] >ffff88800e7e9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.770759] ^ [ 30.771253] ffff88800e7e9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.771783] ffff88800e7e9a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772315] ================================================================== [ 30.772980] Disabling lock debugging due to kernel taint [ 32.955946] BUG: Bad rss-counter state mm:000000004bac1784 type:MM_FILEPAGES val:33 [ 32.956771] BUG: Bad rss-counter state mm:000000004bac1784 type:MM_ANONPAGES val:22 [ 33.485791] BUG: Bad rss-counter state mm:00000000bb84c5d1 type:MM_FILEPAGES val:33 [ 33.486959] BUG: Bad rss-counter state mm:00000000bb84c5d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39128' (ECDSA) to the list of known hosts. 2023/06/20 16:28:59 fuzzer started 2023/06/20 16:29:00 dialing manager at localhost:36067 2023/06/20 16:29:00 checking machine... 2023/06/20 16:29:00 checking revisions... [ 34.126437] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:29:00 testing simple program... [ 34.181818] cgroup: Unknown subsys name 'net' [ 34.234582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:28:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a98 RCX=ffffffff860d8201 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffff88806ce09af0 RSP=ffff88806ce09a78 R8 =ffffffff860d825a R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff88800e569b40 R15=ffff88800d2c2ec0 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f4e19fe1900 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=00007ffe81eb4000 CR3=000000001ca74000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb6f30bfbf0 CR3=0000000009a94000 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=b5f800b285ec039a39437ee8b511c5d4 XMM02=2c67c8bc2e329bc3000000000011a178 XMM03=fb795ef6d657705600000000001217f0 XMM04=2bc40402600674ab00000000000ae988 XMM05=19e9129bd510f2350000000000131908 XMM06=256b8d2f7fcc4bf30000000000130770 XMM07=e042d86d42eb936e0000000000121a70 XMM08=c872df158d199157000000000011a1d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000