syzkaller login: [ 24.072280] BUG: Bad rss-counter state mm:00000000212b37ff type:MM_FILEPAGES val:33 [ 24.074089] BUG: Bad rss-counter state mm:00000000212b37ff type:MM_ANONPAGES val:22 [ 24.236392] ================================================================== [ 24.237510] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.238765] Read of size 8 at addr ffff88800e238798 by task sshd/219 [ 24.239687] [ 24.239933] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.240987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.242118] Call Trace: [ 24.242434] [ 24.242725] dump_stack_lvl+0x91/0xf0 [ 24.243223] print_report+0xcc/0x620 [ 24.243719] ? __virt_addr_valid+0x102/0x340 [ 24.244278] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.244905] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.245531] kasan_report+0xbe/0xf0 [ 24.246023] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.246661] vma_interval_tree_remove+0xc75/0xec0 [ 24.247260] vma_prepare+0xc54/0x11a0 [ 24.247735] __split_vma+0x5af/0x950 [ 24.248203] ? __pfx___split_vma+0x10/0x10 [ 24.248731] ? find_held_lock+0x2c/0x110 [ 24.249277] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.249835] ? lock_is_held_type+0x9f/0x120 [ 24.250376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.250982] ? mtree_range_walk+0x632/0x900 [ 24.251532] ? mas_walk+0x5c7/0x7c0 [ 24.252005] do_vmi_munmap+0x1f1/0x2b0 [ 24.252497] mmap_region+0x1f9/0x2660 [ 24.252984] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.253499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.254213] ? __pfx_lock_acquire+0x10/0x10 [ 24.254745] ? __pfx_mmap_region+0x10/0x10 [ 24.255275] ? security_mmap_addr+0x7d/0xa0 [ 24.255805] ? get_unmapped_area+0x1f5/0x3f0 [ 24.256356] do_mmap+0x854/0xf00 [ 24.256793] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.257307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.257870] ksys_mmap_pgoff+0x3af/0x500 [ 24.258377] do_syscall_64+0x3f/0x90 [ 24.258850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.259497] RIP: 0033:0x7f280f38bd82 [ 24.259952] 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 [ 24.262076] RSP: 002b:00007ffc4c6df548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.262980] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f280f38bd82 [ 24.263821] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f280e7c5000 [ 24.264672] RBP: 00007f280e7c5000 R08: 0000000000000009 R09: 0000000000001000 [ 24.265516] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a92d76f70 [ 24.266359] R13: 00007ffc4c6df560 R14: 00007ffc4c6df590 R15: 00007ffc4c6df8f0 [ 24.267212] [ 24.267502] [ 24.267717] Allocated by task 212: [ 24.268144] kasan_save_stack+0x22/0x50 [ 24.268648] kasan_set_track+0x25/0x30 [ 24.269156] __kasan_slab_alloc+0x59/0x70 [ 24.269679] kmem_cache_alloc+0x16b/0x370 [ 24.270196] vm_area_dup+0x20/0x160 [ 24.270648] __split_vma+0x170/0x950 [ 24.271113] split_vma+0xc6/0x110 [ 24.271558] mprotect_fixup+0x8d2/0xb30 [ 24.272058] do_mprotect_pkey+0x87e/0xd40 [ 24.272579] __x64_sys_mprotect+0x78/0xc0 [ 24.273111] do_syscall_64+0x3f/0x90 [ 24.273586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.274229] [ 24.274445] Freed by task 212: [ 24.274839] kasan_save_stack+0x22/0x50 [ 24.275340] kasan_set_track+0x25/0x30 [ 24.275835] kasan_save_free_info+0x2b/0x50 [ 24.276368] __kasan_slab_free+0x10a/0x190 [ 24.276899] kmem_cache_free+0x10d/0x4d0 [ 24.277435] rcu_core+0x8c8/0x2860 [ 24.277879] __do_softirq+0x1b7/0x7d4 [ 24.278353] [ 24.278624] Last potentially related work creation: [ 24.279226] kasan_save_stack+0x22/0x50 [ 24.279735] __kasan_record_aux_stack+0x8e/0xa0 [ 24.280307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.280948] remove_vma+0x139/0x170 [ 24.281412] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.281971] do_vmi_munmap+0x1f1/0x2b0 [ 24.282459] __vm_munmap+0x138/0x3a0 [ 24.282926] __x64_sys_munmap+0x59/0x80 [ 24.283424] do_syscall_64+0x3f/0x90 [ 24.283897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.284537] [ 24.284755] The buggy address belongs to the object at ffff88800e238740 [ 24.284755] which belongs to the cache vm_area_struct of size 168 [ 24.286238] The buggy address is located 88 bytes inside of [ 24.286238] freed 168-byte region [ffff88800e238740, ffff88800e2387e8) [ 24.287661] [ 24.287880] The buggy address belongs to the physical page: [ 24.288556] page:000000004c14fb3c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe238 [ 24.289674] memcg:ffff88801aaeac01 [ 24.290108] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.290771] page_type: 0xffffffff() [ 24.291229] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.292166] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801aaeac01 [ 24.293088] page dumped because: kasan: bad access detected [ 24.293775] [ 24.293989] Memory state around the buggy address: [ 24.294577] ffff88800e238680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.295457] ffff88800e238700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.296329] >ffff88800e238780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.297221] ^ [ 24.297711] ffff88800e238800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.298570] ffff88800e238880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.299430] ================================================================== [ 24.300418] Disabling lock debugging due to kernel taint [ 26.254358] BUG: Bad rss-counter state mm:00000000e7775392 type:MM_FILEPAGES val:33 [ 26.255360] BUG: Bad rss-counter state mm:00000000e7775392 type:MM_ANONPAGES val:22 [ 26.728240] BUG: Bad rss-counter state mm:00000000b2b4b312 type:MM_FILEPAGES val:33 [ 26.729712] BUG: Bad rss-counter state mm:00000000b2b4b312 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40433' (ECDSA) to the list of known hosts. 2023/06/19 22:07:44 fuzzer started 2023/06/19 22:07:44 dialing manager at localhost:44161 2023/06/19 22:07:44 checking machine... 2023/06/19 22:07:44 checking revisions... [ 27.450832] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:07:45 testing simple program... [ 27.504783] cgroup: Unknown subsys name 'net' [ 27.570024] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:07:44 Registers: info registers vcpu 0 RAX=ffffffff85d3bed0 RBX=1ffff11001a06e85 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800d037408 R8 =0000000000000000 R9 =0000000000000000 R10=00000000000000d5 R11=0000085700000857 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180eeb6 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 00007f8ae02bb900 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=00007ffc0d6e9000 CR3=000000000e73c000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fc5582bb300 CR3=0000000013a8c000 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=2034343a37303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a37303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000