syzkaller login: [ 35.517042] BUG: Bad rss-counter state mm:000000004916c570 type:MM_FILEPAGES val:33 [ 35.519062] BUG: Bad rss-counter state mm:000000004916c570 type:MM_ANONPAGES val:22 [ 35.675829] ================================================================== [ 35.676887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.677984] Read of size 8 at addr ffff88800ca8c880 by task sshd/218 [ 35.679011] [ 35.679227] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.680085] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.681070] Call Trace: [ 35.681395] [ 35.681679] dump_stack_lvl+0x91/0xf0 [ 35.682164] print_report+0xcc/0x620 [ 35.682641] ? __virt_addr_valid+0x102/0x340 [ 35.683207] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.683836] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.684447] kasan_report+0xbe/0xf0 [ 35.684926] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.685540] vma_interval_tree_remove+0xc75/0xec0 [ 35.686148] vma_prepare+0xc54/0x11a0 [ 35.686623] __split_vma+0x5af/0x950 [ 35.687107] ? __pfx___split_vma+0x10/0x10 [ 35.687634] ? find_held_lock+0x2c/0x110 [ 35.688154] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.688713] ? lock_is_held_type+0x9f/0x120 [ 35.689246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.689844] ? mtree_range_walk+0x632/0x900 [ 35.690393] ? mas_walk+0x5c7/0x7c0 [ 35.690885] do_vmi_munmap+0x1f1/0x2b0 [ 35.691373] mmap_region+0x1f9/0x2660 [ 35.691846] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.692352] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.693061] ? __pfx_lock_acquire+0x10/0x10 [ 35.693586] ? __pfx_mmap_region+0x10/0x10 [ 35.694114] ? security_mmap_addr+0x7d/0xa0 [ 35.694640] ? get_unmapped_area+0x1f5/0x3f0 [ 35.695208] do_mmap+0x854/0xf00 [ 35.695642] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.696135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.696690] ksys_mmap_pgoff+0x3af/0x500 [ 35.697197] do_syscall_64+0x3f/0x90 [ 35.697670] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.698307] RIP: 0033:0x7fba7342fd82 [ 35.698766] 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 [ 35.700858] RSP: 002b:00007ffd4b8f62f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.701754] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba7342fd82 [ 35.702605] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba72869000 [ 35.703453] RBP: 00007fba72869000 R08: 0000000000000009 R09: 0000000000001000 [ 35.704302] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e659ae7b20 [ 35.705154] R13: 00007ffd4b8f6310 R14: 00007ffd4b8f6340 R15: 00007ffd4b8f66a0 [ 35.706014] [ 35.706304] [ 35.706517] Allocated by task 211: [ 35.706945] kasan_save_stack+0x22/0x50 [ 35.707445] kasan_set_track+0x25/0x30 [ 35.707936] __kasan_slab_alloc+0x59/0x70 [ 35.708458] kmem_cache_alloc+0x16b/0x370 [ 35.708971] vm_area_dup+0x20/0x160 [ 35.709424] __split_vma+0x170/0x950 [ 35.709891] split_vma+0xc6/0x110 [ 35.710343] mprotect_fixup+0x8d2/0xb30 [ 35.710885] do_mprotect_pkey+0x87e/0xd40 [ 35.711427] __x64_sys_mprotect+0x78/0xc0 [ 35.711969] do_syscall_64+0x3f/0x90 [ 35.712464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.713139] [ 35.713365] Freed by task 211: [ 35.713775] kasan_save_stack+0x22/0x50 [ 35.714298] kasan_set_track+0x25/0x30 [ 35.714817] kasan_save_free_info+0x2b/0x50 [ 35.715367] __kasan_slab_free+0x10a/0x190 [ 35.715918] kmem_cache_free+0x10d/0x4d0 [ 35.716438] rcu_core+0x8c8/0x2860 [ 35.716908] __do_softirq+0x1b7/0x7d4 [ 35.717406] [ 35.717632] Last potentially related work creation: [ 35.718253] kasan_save_stack+0x22/0x50 [ 35.718797] __kasan_record_aux_stack+0x8e/0xa0 [ 35.719451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.720132] remove_vma+0x139/0x170 [ 35.720602] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.721187] do_vmi_munmap+0x1f1/0x2b0 [ 35.721694] __vm_munmap+0x138/0x3a0 [ 35.722179] __x64_sys_munmap+0x59/0x80 [ 35.722704] do_syscall_64+0x3f/0x90 [ 35.723203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.723873] [ 35.724094] The buggy address belongs to the object at ffff88800ca8c828 [ 35.724094] which belongs to the cache vm_area_struct of size 168 [ 35.725625] The buggy address is located 88 bytes inside of [ 35.725625] freed 168-byte region [ffff88800ca8c828, ffff88800ca8c8d0) [ 35.727132] [ 35.727355] The buggy address belongs to the physical page: [ 35.728046] page:000000009296c3bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca8c [ 35.729184] memcg:ffff88800e9ad101 [ 35.729634] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.730361] page_type: 0xffffffff() [ 35.730843] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.731803] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9ad101 [ 35.732763] page dumped because: kasan: bad access detected [ 35.733455] [ 35.733685] Memory state around the buggy address: [ 35.734296] ffff88800ca8c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 35.735204] ffff88800ca8c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 35.736101] >ffff88800ca8c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 35.737008] ^ [ 35.737441] ffff88800ca8c900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.738341] ffff88800ca8c980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 35.739250] ================================================================== [ 35.740260] Disabling lock debugging due to kernel taint [ 37.324656] BUG: Bad rss-counter state mm:0000000099bc5a09 type:MM_FILEPAGES val:33 [ 37.325454] BUG: Bad rss-counter state mm:0000000099bc5a09 type:MM_ANONPAGES val:22 [ 37.789028] BUG: Bad rss-counter state mm:00000000444d08c6 type:MM_FILEPAGES val:33 [ 37.790300] BUG: Bad rss-counter state mm:00000000444d08c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58140' (ECDSA) to the list of known hosts. 2023/06/19 20:59:31 fuzzer started 2023/06/19 20:59:31 dialing manager at localhost:44161 2023/06/19 20:59:31 checking machine... 2023/06/19 20:59:31 checking revisions... [ 38.465055] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:59:31 testing simple program... [ 38.498684] cgroup: Unknown subsys name 'net' [ 38.545911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:59:26 Registers: info registers vcpu 0 RAX=1ffffffff0c26e35 RBX=0000000000000001 RCX=ffffffff861371a8 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff8880096d78b0 RBP=ffff8880096d78a0 RSP=ffff8880096d77d8 R8 =ffffffff861371ac R9 =ffff8880096d7888 R10=0000000000038001 R11=0000000000020cf8 R12=ffff8880096d78a8 R13=ffff8880096d7890 R14=ffff8880096d7ce8 R15=ffff8880096d7848 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007ff0cb9c9900 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=00007ffd6970b000 CR3=000000000ee38000 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=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=00007f482ffd89d0 CR3=000000001973c000 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=39353a3032203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000