syzkaller login: [ 30.550623] BUG: Bad rss-counter state mm:00000000486062db type:MM_FILEPAGES val:33 [ 30.551878] BUG: Bad rss-counter state mm:00000000486062db type:MM_ANONPAGES val:22 [ 30.703789] ================================================================== [ 30.704877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.705985] Read of size 8 at addr ffff88800ef6e968 by task sshd/220 [ 30.707023] [ 30.707278] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.708299] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.709415] Call Trace: [ 30.709742] [ 30.710039] dump_stack_lvl+0x91/0xf0 [ 30.710538] print_report+0xcc/0x620 [ 30.711025] ? __virt_addr_valid+0x102/0x340 [ 30.711579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712206] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.712837] kasan_report+0xbe/0xf0 [ 30.713309] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.713926] vma_interval_tree_remove+0xc75/0xec0 [ 30.714529] vma_prepare+0xc54/0x11a0 [ 30.715006] __split_vma+0x5af/0x950 [ 30.715476] ? __pfx___split_vma+0x10/0x10 [ 30.716003] ? find_held_lock+0x2c/0x110 [ 30.716542] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.717108] ? lock_is_held_type+0x9f/0x120 [ 30.717646] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.718248] ? mtree_range_walk+0x632/0x900 [ 30.718799] ? mas_walk+0x5c7/0x7c0 [ 30.719274] do_vmi_munmap+0x1f1/0x2b0 [ 30.719769] mmap_region+0x1f9/0x2660 [ 30.720250] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.720783] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.721495] ? __pfx_lock_acquire+0x10/0x10 [ 30.722025] ? __pfx_mmap_region+0x10/0x10 [ 30.722554] ? security_mmap_addr+0x7d/0xa0 [ 30.723081] ? get_unmapped_area+0x1f5/0x3f0 [ 30.723626] do_mmap+0x854/0xf00 [ 30.724065] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.724571] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.725136] ksys_mmap_pgoff+0x3af/0x500 [ 30.725642] do_syscall_64+0x3f/0x90 [ 30.726122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.726765] RIP: 0033:0x7f642b943d82 [ 30.727218] 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 [ 30.729336] RSP: 002b:00007ffe54612018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.730233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f642b943d82 [ 30.731073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f642ad7d000 [ 30.731915] RBP: 00007f642ad7d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.732773] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623dccd4f70 [ 30.733616] R13: 00007ffe54612030 R14: 00007ffe54612060 R15: 00007ffe546123c0 [ 30.734463] [ 30.734759] [ 30.734978] Allocated by task 213: [ 30.735402] kasan_save_stack+0x22/0x50 [ 30.735900] kasan_set_track+0x25/0x30 [ 30.736395] __kasan_slab_alloc+0x59/0x70 [ 30.736933] kmem_cache_alloc+0x16b/0x370 [ 30.737449] vm_area_dup+0x20/0x160 [ 30.737909] __split_vma+0x170/0x950 [ 30.738377] split_vma+0xc6/0x110 [ 30.738823] mprotect_fixup+0x8d2/0xb30 [ 30.739323] do_mprotect_pkey+0x87e/0xd40 [ 30.739848] __x64_sys_mprotect+0x78/0xc0 [ 30.740364] do_syscall_64+0x3f/0x90 [ 30.740861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.741502] [ 30.741715] Freed by task 213: [ 30.742115] kasan_save_stack+0x22/0x50 [ 30.742616] kasan_set_track+0x25/0x30 [ 30.743109] kasan_save_free_info+0x2b/0x50 [ 30.743643] __kasan_slab_free+0x10a/0x190 [ 30.744173] kmem_cache_free+0x10d/0x4d0 [ 30.744692] rcu_core+0x8c8/0x2860 [ 30.745137] __do_softirq+0x1b7/0x7d4 [ 30.745617] [ 30.745832] Last potentially related work creation: [ 30.746463] kasan_save_stack+0x22/0x50 [ 30.746975] __kasan_record_aux_stack+0x8e/0xa0 [ 30.747546] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.748265] remove_vma+0x139/0x170 [ 30.748733] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.749313] do_vmi_munmap+0x1f1/0x2b0 [ 30.749813] __vm_munmap+0x138/0x3a0 [ 30.750291] __x64_sys_munmap+0x59/0x80 [ 30.750813] do_syscall_64+0x3f/0x90 [ 30.751304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751965] [ 30.752182] The buggy address belongs to the object at ffff88800ef6e910 [ 30.752182] which belongs to the cache vm_area_struct of size 168 [ 30.753666] The buggy address is located 88 bytes inside of [ 30.753666] freed 168-byte region [ffff88800ef6e910, ffff88800ef6e9b8) [ 30.755081] [ 30.755298] The buggy address belongs to the physical page: [ 30.755960] page:00000000b1c56ad2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef6e [ 30.757057] memcg:ffff88800ef4a301 [ 30.757487] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.758241] page_type: 0xffffffff() [ 30.758710] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ce40 dead000000000007 [ 30.759683] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef4a301 [ 30.760668] page dumped because: kasan: bad access detected [ 30.761375] [ 30.761594] Memory state around the buggy address: [ 30.762195] ffff88800ef6e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.763081] ffff88800ef6e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.763979] >ffff88800ef6e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.764865] ^ [ 30.765681] ffff88800ef6e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.766572] ffff88800ef6ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.767442] ================================================================== [ 30.768375] Disabling lock debugging due to kernel taint [ 33.295343] BUG: Bad rss-counter state mm:0000000077d420f0 type:MM_FILEPAGES val:33 [ 33.296690] BUG: Bad rss-counter state mm:0000000077d420f0 type:MM_ANONPAGES val:22 [ 33.752396] BUG: Bad rss-counter state mm:000000006b4f05e5 type:MM_FILEPAGES val:33 [ 33.753380] BUG: Bad rss-counter state mm:000000006b4f05e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61180' (ECDSA) to the list of known hosts. 2023/06/20 23:43:45 fuzzer started 2023/06/20 23:43:45 dialing manager at localhost:36067 2023/06/20 23:43:45 checking machine... 2023/06/20 23:43:45 checking revisions... [ 34.431069] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:43:45 testing simple program... [ 34.471815] cgroup: Unknown subsys name 'net' [ 34.510924] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:43:45 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000010 RCX=0000000000000000 RDX=1ffff11003451090 RSI=ffffffff81f11c83 RDI=ffff88801a288480 RBP=ffff88801a288460 RSP=ffff888019c6fd28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=000000000000001f R13=ffff88801929b980 R14=1ffff1100338dfa9 R15=0000000000000001 RIP=ffffffff81f11c9c RFL=00000216 [----AP-] 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 00007fb5be592900 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=00007ffff0863000 CR3=000000000e83e000 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=0000607f92e0c5f8 RBX=ffff888009749180 RCX=0000000000000000 RDX=ffffffff81803bb0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff88800da15e00 RSP=ffff88806cf09e00 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff8880087b8780 R13=ffffea000025d200 R14=ffffffff8186b835 R15=ffff88800da15e00 RIP=ffffffff81803bf3 RFL=00000206 [-----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 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=00007f8e380c9d50 CR3=000000000d73e000 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=2034343a33343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000