syzkaller login: [ 31.148895] BUG: Bad rss-counter state mm:0000000087b1fcad type:MM_FILEPAGES val:33 [ 31.150033] BUG: Bad rss-counter state mm:0000000087b1fcad type:MM_ANONPAGES val:22 [ 31.323670] ================================================================== [ 31.324606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.325548] Read of size 8 at addr ffff88800e28f3f8 by task sshd/221 [ 31.326442] [ 31.326659] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.327533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.328555] Call Trace: [ 31.328880] [ 31.329169] dump_stack_lvl+0x91/0xf0 [ 31.329669] print_report+0xcc/0x620 [ 31.330162] ? __virt_addr_valid+0x102/0x340 [ 31.330733] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331367] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331989] kasan_report+0xbe/0xf0 [ 31.332468] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.333100] vma_interval_tree_remove+0xc75/0xec0 [ 31.333705] vma_prepare+0xc54/0x11a0 [ 31.334194] __split_vma+0x5af/0x950 [ 31.334699] ? __pfx___split_vma+0x10/0x10 [ 31.335246] ? find_held_lock+0x2c/0x110 [ 31.335780] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.336357] ? lock_is_held_type+0x9f/0x120 [ 31.336905] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.337520] ? mtree_range_walk+0x632/0x900 [ 31.338081] ? mas_walk+0x5c7/0x7c0 [ 31.338574] do_vmi_munmap+0x1f1/0x2b0 [ 31.339072] mmap_region+0x1f9/0x2660 [ 31.339566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.340091] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.340816] ? __pfx_lock_acquire+0x10/0x10 [ 31.341360] ? __pfx_mmap_region+0x10/0x10 [ 31.341896] ? security_mmap_addr+0x7d/0xa0 [ 31.342451] ? get_unmapped_area+0x1f5/0x3f0 [ 31.343014] do_mmap+0x854/0xf00 [ 31.343457] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.343960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.344530] ksys_mmap_pgoff+0x3af/0x500 [ 31.345051] do_syscall_64+0x3f/0x90 [ 31.345539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346201] RIP: 0033:0x7fb2bb448d82 [ 31.346676] 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 [ 31.348843] RSP: 002b:00007ffc8563d6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.349757] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2bb448d82 [ 31.350632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2ba882000 [ 31.351493] RBP: 00007fb2ba882000 R08: 0000000000000009 R09: 0000000000001000 [ 31.352359] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651fba83d90 [ 31.353221] R13: 00007ffc8563d710 R14: 00007ffc8563d740 R15: 00007ffc8563daa0 [ 31.354096] [ 31.354410] [ 31.354621] Allocated by task 214: [ 31.355053] kasan_save_stack+0x22/0x50 [ 31.355566] kasan_set_track+0x25/0x30 [ 31.356065] __kasan_slab_alloc+0x59/0x70 [ 31.356595] kmem_cache_alloc+0x16b/0x370 [ 31.357123] vm_area_dup+0x20/0x160 [ 31.357586] __split_vma+0x170/0x950 [ 31.358059] split_vma+0xc6/0x110 [ 31.358518] mprotect_fixup+0x8d2/0xb30 [ 31.359028] do_mprotect_pkey+0x87e/0xd40 [ 31.359551] __x64_sys_mprotect+0x78/0xc0 [ 31.360083] do_syscall_64+0x3f/0x90 [ 31.360569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361222] [ 31.361448] Freed by task 214: [ 31.361848] kasan_save_stack+0x22/0x50 [ 31.362369] kasan_set_track+0x25/0x30 [ 31.362869] kasan_save_free_info+0x2b/0x50 [ 31.363412] __kasan_slab_free+0x10a/0x190 [ 31.363960] kmem_cache_free+0x10d/0x4d0 [ 31.364478] rcu_core+0x8c8/0x2860 [ 31.364935] __do_softirq+0x1b7/0x7d4 [ 31.365419] [ 31.365642] Last potentially related work creation: [ 31.366246] kasan_save_stack+0x22/0x50 [ 31.366783] __kasan_record_aux_stack+0x8e/0xa0 [ 31.367370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.368012] remove_vma+0x139/0x170 [ 31.368467] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.369036] do_vmi_munmap+0x1f1/0x2b0 [ 31.369524] __vm_munmap+0x138/0x3a0 [ 31.369997] __x64_sys_munmap+0x59/0x80 [ 31.370513] do_syscall_64+0x3f/0x90 [ 31.370993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.371645] [ 31.371868] The buggy address belongs to the object at ffff88800e28f3a0 [ 31.371868] which belongs to the cache vm_area_struct of size 168 [ 31.373374] The buggy address is located 88 bytes inside of [ 31.373374] freed 168-byte region [ffff88800e28f3a0, ffff88800e28f448) [ 31.374811] [ 31.375033] The buggy address belongs to the physical page: [ 31.375709] page:000000009c3d70c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe28f [ 31.376821] memcg:ffff88800ef7a101 [ 31.377257] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.377919] page_type: 0xffffffff() [ 31.378402] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.379339] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef7a101 [ 31.380271] page dumped because: kasan: bad access detected [ 31.380946] [ 31.381165] Memory state around the buggy address: [ 31.381765] ffff88800e28f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.382654] ffff88800e28f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.383520] >ffff88800e28f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.384387] ^ [ 31.385242] ffff88800e28f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.386117] ffff88800e28f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.387006] ================================================================== [ 31.387989] Disabling lock debugging due to kernel taint [ 33.519874] BUG: Bad rss-counter state mm:0000000075fa7f5c type:MM_FILEPAGES val:33 [ 33.521094] BUG: Bad rss-counter state mm:0000000075fa7f5c type:MM_ANONPAGES val:22 [ 33.983131] BUG: Bad rss-counter state mm:000000007182af1d type:MM_FILEPAGES val:33 [ 33.984135] BUG: Bad rss-counter state mm:000000007182af1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48458' (ECDSA) to the list of known hosts. 2023/06/21 09:34:20 fuzzer started 2023/06/21 09:34:20 dialing manager at localhost:36067 2023/06/21 09:34:20 checking machine... 2023/06/21 09:34:20 checking revisions... [ 34.611564] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:34:20 testing simple program... [ 34.667239] cgroup: Unknown subsys name 'net' [ 34.734793] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:34:20 Registers: info registers vcpu 0 RAX=1ffff11002768639 RBX=ffff888013b43198 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888013b431c8 RBP=ffff8880136e8b18 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88801923f318 R14=ffffffff813782f8 R15=ffff88800da34900 RIP=ffffffff818464e2 RFL=00000046 [---Z-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 00007f36565d6900 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=00007f3656b8d618 CR3=000000000ef02000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007fb417c0b0b0 CR3=0000000015fb6000 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=2030323a34333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a34333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000