syzkaller login: [ 41.290645] BUG: Bad rss-counter state mm:000000005858e335 type:MM_FILEPAGES val:33 [ 41.291995] BUG: Bad rss-counter state mm:000000005858e335 type:MM_ANONPAGES val:22 [ 41.433249] ================================================================== [ 41.434133] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.435049] Read of size 8 at addr ffff88800cb3cc20 by task sshd/221 [ 41.435924] [ 41.436135] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.436983] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.437947] Call Trace: [ 41.438259] [ 41.438536] dump_stack_lvl+0x91/0xf0 [ 41.439009] print_report+0xcc/0x620 [ 41.439483] ? __virt_addr_valid+0x102/0x340 [ 41.440044] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.440642] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.441243] kasan_report+0xbe/0xf0 [ 41.441710] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.442316] vma_interval_tree_remove+0xc75/0xec0 [ 41.442901] vma_prepare+0xc54/0x11a0 [ 41.443361] __split_vma+0x5af/0x950 [ 41.443826] ? __pfx___split_vma+0x10/0x10 [ 41.444339] ? find_held_lock+0x2c/0x110 [ 41.444845] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.445394] ? lock_is_held_type+0x9f/0x120 [ 41.445912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.446499] ? mtree_range_walk+0x632/0x900 [ 41.447029] ? mas_walk+0x5c7/0x7c0 [ 41.447487] do_vmi_munmap+0x1f1/0x2b0 [ 41.447970] mmap_region+0x1f9/0x2660 [ 41.448440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.448935] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.449623] ? __pfx_lock_acquire+0x10/0x10 [ 41.450136] ? __pfx_mmap_region+0x10/0x10 [ 41.450649] ? security_mmap_addr+0x7d/0xa0 [ 41.451163] ? get_unmapped_area+0x1f5/0x3f0 [ 41.451693] do_mmap+0x854/0xf00 [ 41.452134] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.452612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.453159] ksys_mmap_pgoff+0x3af/0x500 [ 41.453653] do_syscall_64+0x3f/0x90 [ 41.454118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.454743] RIP: 0033:0x7f47df220d82 [ 41.455185] 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 [ 41.457230] RSP: 002b:00007ffc2757e158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.458100] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47df220d82 [ 41.458930] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47de65a000 [ 41.459797] RBP: 00007f47de65a000 R08: 0000000000000009 R09: 0000000000001000 [ 41.460627] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651f5142d90 [ 41.461456] R13: 00007ffc2757e170 R14: 00007ffc2757e1a0 R15: 00007ffc2757e500 [ 41.462298] [ 41.462584] [ 41.462798] Allocated by task 214: [ 41.463224] kasan_save_stack+0x22/0x50 [ 41.463718] kasan_set_track+0x25/0x30 [ 41.464208] __kasan_slab_alloc+0x59/0x70 [ 41.464717] kmem_cache_alloc+0x16b/0x370 [ 41.465225] vm_area_dup+0x20/0x160 [ 41.465665] __split_vma+0x170/0x950 [ 41.466132] split_vma+0xc6/0x110 [ 41.466565] mprotect_fixup+0x8d2/0xb30 [ 41.467053] do_mprotect_pkey+0x87e/0xd40 [ 41.467564] __x64_sys_mprotect+0x78/0xc0 [ 41.468080] do_syscall_64+0x3f/0x90 [ 41.468543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.469174] [ 41.469383] Freed by task 214: [ 41.469770] kasan_save_stack+0x22/0x50 [ 41.470263] kasan_set_track+0x25/0x30 [ 41.470744] kasan_save_free_info+0x2b/0x50 [ 41.471266] __kasan_slab_free+0x10a/0x190 [ 41.471799] kmem_cache_free+0x10d/0x4d0 [ 41.472295] rcu_core+0x8c8/0x2860 [ 41.472728] __do_softirq+0x1b7/0x7d4 [ 41.473195] [ 41.473403] Last potentially related work creation: [ 41.473976] kasan_save_stack+0x22/0x50 [ 41.474469] __kasan_record_aux_stack+0x8e/0xa0 [ 41.475032] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.475664] remove_vma+0x139/0x170 [ 41.476117] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.476665] do_vmi_munmap+0x1f1/0x2b0 [ 41.477137] __vm_munmap+0x138/0x3a0 [ 41.477599] __x64_sys_munmap+0x59/0x80 [ 41.478089] do_syscall_64+0x3f/0x90 [ 41.478548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.479175] [ 41.479386] Second to last potentially related work creation: [ 41.480061] kasan_save_stack+0x22/0x50 [ 41.480555] __kasan_record_aux_stack+0x8e/0xa0 [ 41.481112] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.481737] remove_vma+0x139/0x170 [ 41.482185] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.482735] do_vmi_munmap+0x1f1/0x2b0 [ 41.483209] mmap_region+0x1f9/0x2660 [ 41.483676] do_mmap+0x854/0xf00 [ 41.484112] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.484586] ksys_mmap_pgoff+0x3af/0x500 [ 41.485081] do_syscall_64+0x3f/0x90 [ 41.485548] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.486185] [ 41.486399] The buggy address belongs to the object at ffff88800cb3cbc8 [ 41.486399] which belongs to the cache vm_area_struct of size 168 [ 41.487833] The buggy address is located 88 bytes inside of [ 41.487833] freed 168-byte region [ffff88800cb3cbc8, ffff88800cb3cc70) [ 41.489217] [ 41.489429] The buggy address belongs to the physical page: [ 41.490077] page:0000000015e2a819 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb3c [ 41.491131] memcg:ffff888016994601 [ 41.491548] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.492237] page_type: 0xffffffff() [ 41.492679] raw: 0100000000000200 ffff88800879fc80 0000000000000000 0000000000000001 [ 41.493574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016994601 [ 41.494456] page dumped because: kasan: bad access detected [ 41.495094] [ 41.495303] Memory state around the buggy address: [ 41.495870] ffff88800cb3cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.496717] ffff88800cb3cb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 41.497557] >ffff88800cb3cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 41.498385] ^ [ 41.498904] ffff88800cb3cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.499749] ffff88800cb3cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.500605] ================================================================== [ 41.501545] Disabling lock debugging due to kernel taint [ 43.354536] BUG: Bad rss-counter state mm:00000000ec79146f type:MM_FILEPAGES val:33 [ 43.355189] BUG: Bad rss-counter state mm:00000000ec79146f type:MM_ANONPAGES val:22 [ 43.800145] BUG: Bad rss-counter state mm:00000000627be2e9 type:MM_FILEPAGES val:33 [ 43.801312] BUG: Bad rss-counter state mm:00000000627be2e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16950' (ECDSA) to the list of known hosts. 2023/06/20 10:28:20 fuzzer started 2023/06/20 10:28:20 dialing manager at localhost:44161 2023/06/20 10:28:20 checking machine... 2023/06/20 10:28:20 checking revisions... [ 44.423324] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:28:21 testing simple program... [ 44.464701] cgroup: Unknown subsys name 'net' [ 44.500792] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:28:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff11001e9fea3 RSI=ffffffff8180c522 RDI=ffff88800f4ff588 RBP=ffff88800f4ff558 RSP=ffff88800f4ff4b0 R8 =ffffffff860d68fa R9 =ffff88800f4ff500 R10=0000000000038001 R11=0000000000010b7e R12=ffff88800f4ff588 R13=0000000000000000 R14=ffff888015910000 R15=1ffff11001e9ff1d RIP=ffffffff813ad42f RFL=00000286 [--S--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 00007ff546863700 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=00007f7926da30b0 CR3=000000000e91c000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3133325b646873732030323a3832 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303938 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=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=00007fdf21ab4fc0 CR3=00000000098be000 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=392be84661fcf2805f4000f1d073eecb XMM02=000000000011ec88eff9b2d0a8fce9cb XMM03=000000000011ed582c67c8bc2e329bc3 XMM04=14dafc0e6e40905800000000000ae988 XMM05=59d5b690e0af863b0000000000136948 XMM06=00c3ffa147b8d85700000000001367d0 XMM07=e042d86d42eb936e0000000000125c80 XMM08=7b149a39cfc31898000000000011ed58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000