syzkaller login: [ 31.201976] BUG: Bad rss-counter state mm:00000000de16e6b8 type:MM_FILEPAGES val:33 [ 31.203002] BUG: Bad rss-counter state mm:00000000de16e6b8 type:MM_ANONPAGES val:22 [ 31.377736] ================================================================== [ 31.379021] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.380351] Read of size 8 at addr ffff888019d5eb38 by task sshd/221 [ 31.381335] [ 31.381605] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.382746] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.384013] Call Trace: [ 31.384425] [ 31.384789] dump_stack_lvl+0x91/0xf0 [ 31.385408] print_report+0xcc/0x620 [ 31.386048] ? __virt_addr_valid+0x102/0x340 [ 31.386736] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387357] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.387978] kasan_report+0xbe/0xf0 [ 31.388463] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.389092] vma_interval_tree_remove+0xc75/0xec0 [ 31.389695] vma_prepare+0xc54/0x11a0 [ 31.390199] __split_vma+0x5af/0x950 [ 31.390677] ? __pfx___split_vma+0x10/0x10 [ 31.391212] ? find_held_lock+0x2c/0x110 [ 31.391736] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.392305] ? lock_is_held_type+0x9f/0x120 [ 31.392844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.393455] ? mtree_range_walk+0x632/0x900 [ 31.394022] ? mas_walk+0x5c7/0x7c0 [ 31.394503] do_vmi_munmap+0x1f1/0x2b0 [ 31.394997] mmap_region+0x1f9/0x2660 [ 31.395486] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.396030] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.396776] ? __pfx_lock_acquire+0x10/0x10 [ 31.397336] ? __pfx_mmap_region+0x10/0x10 [ 31.397890] ? security_mmap_addr+0x7d/0xa0 [ 31.398465] ? get_unmapped_area+0x1f5/0x3f0 [ 31.399043] do_mmap+0x854/0xf00 [ 31.399504] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.400018] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.400606] ksys_mmap_pgoff+0x3af/0x500 [ 31.401136] do_syscall_64+0x3f/0x90 [ 31.401633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.402321] RIP: 0033:0x7f68365e5d82 [ 31.402796] 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 [ 31.405040] RSP: 002b:00007fff0edf1888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.406006] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68365e5d82 [ 31.406891] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6835a1f000 [ 31.407782] RBP: 00007f6835a1f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.408674] R10: 0000000000000812 R11: 0000000000000206 R12: 00005590fbf14ec0 [ 31.409559] R13: 00007fff0edf18a0 R14: 00007fff0edf18d0 R15: 00007fff0edf1c30 [ 31.410463] [ 31.410766] [ 31.410990] Allocated by task 214: [ 31.411437] kasan_save_stack+0x22/0x50 [ 31.411972] kasan_set_track+0x25/0x30 [ 31.412489] __kasan_slab_alloc+0x59/0x70 [ 31.413040] kmem_cache_alloc+0x16b/0x370 [ 31.413584] vm_area_dup+0x20/0x160 [ 31.414071] __split_vma+0x170/0x950 [ 31.414566] split_vma+0xc6/0x110 [ 31.415033] mprotect_fixup+0x8d2/0xb30 [ 31.415558] do_mprotect_pkey+0x87e/0xd40 [ 31.416108] __x64_sys_mprotect+0x78/0xc0 [ 31.416656] do_syscall_64+0x3f/0x90 [ 31.417152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.417829] [ 31.418075] Freed by task 214: [ 31.418485] kasan_save_stack+0x22/0x50 [ 31.419013] kasan_set_track+0x25/0x30 [ 31.419522] kasan_save_free_info+0x2b/0x50 [ 31.420077] __kasan_slab_free+0x10a/0x190 [ 31.420637] kmem_cache_free+0x10d/0x4d0 [ 31.421176] rcu_core+0x8c8/0x2860 [ 31.421641] __do_softirq+0x1b7/0x7d4 [ 31.422152] [ 31.422379] Last potentially related work creation: [ 31.422993] kasan_save_stack+0x22/0x50 [ 31.423523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.424123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.424798] remove_vma+0x139/0x170 [ 31.425272] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.425855] do_vmi_munmap+0x1f1/0x2b0 [ 31.426389] __vm_munmap+0x138/0x3a0 [ 31.426883] __x64_sys_munmap+0x59/0x80 [ 31.427407] do_syscall_64+0x3f/0x90 [ 31.427908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.428568] [ 31.428795] The buggy address belongs to the object at ffff888019d5eae0 [ 31.428795] which belongs to the cache vm_area_struct of size 168 [ 31.430347] The buggy address is located 88 bytes inside of [ 31.430347] freed 168-byte region [ffff888019d5eae0, ffff888019d5eb88) [ 31.431815] [ 31.432039] The buggy address belongs to the physical page: [ 31.432734] page:00000000814724db refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d5e [ 31.433873] memcg:ffff888016019401 [ 31.434342] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.435013] page_type: 0xffffffff() [ 31.435484] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.436450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016019401 [ 31.437404] page dumped because: kasan: bad access detected [ 31.438131] [ 31.438355] Memory state around the buggy address: [ 31.438965] ffff888019d5ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.439860] ffff888019d5ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.440757] >ffff888019d5eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.441641] ^ [ 31.442302] ffff888019d5eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.443189] ffff888019d5ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.444080] ================================================================== [ 31.445230] Disabling lock debugging due to kernel taint [ 33.417431] BUG: Bad rss-counter state mm:000000002b29d998 type:MM_FILEPAGES val:33 [ 33.418075] BUG: Bad rss-counter state mm:000000002b29d998 type:MM_ANONPAGES val:22 [ 33.809260] BUG: Bad rss-counter state mm:00000000a4a2990e type:MM_FILEPAGES val:33 [ 33.810008] BUG: Bad rss-counter state mm:00000000a4a2990e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49563' (ECDSA) to the list of known hosts. 2023/06/20 03:55:26 fuzzer started 2023/06/20 03:55:27 dialing manager at localhost:44161 2023/06/20 03:55:27 checking machine... 2023/06/20 03:55:27 checking revisions... [ 34.440315] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:55:27 testing simple program... [ 34.500396] cgroup: Unknown subsys name 'net' [ 34.539524] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:55:26 Registers: info registers vcpu 0 RAX=ffffffff813ad6d0 RBX=ffffffff813ad420 RCX=ffff888018f07710 RDX=1ffff110031e0ed9 RSI=ffffffff813ad6d0 RDI=ffff888018f07738 RBP=ffff888018f07708 RSP=ffff888018f07660 R8 =0000000000000001 R9 =ffff888018f076b0 R10=0000000000038001 R11=0000000000003c0d R12=ffff888018f07738 R13=0000000000000000 R14=ffff88800dca3680 R15=ffff8880084c6140 RIP=ffffffff8453244a RFL=00000282 [--S----] 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 00007fe46e3b9900 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=00007fe46e398020 CR3=000000000e33c000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fea89c9a930 CR3=000000000ebf6000 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=2036323a35353a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a35353a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000