syzkaller login: [ 32.267699] BUG: Bad rss-counter state mm:00000000cb1d14b1 type:MM_FILEPAGES val:33 [ 32.268691] BUG: Bad rss-counter state mm:00000000cb1d14b1 type:MM_ANONPAGES val:22 [ 32.430639] ================================================================== [ 32.431567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.432541] Read of size 8 at addr ffff8880145d4d08 by task sshd/219 [ 32.433352] [ 32.433568] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.434614] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.435619] Call Trace: [ 32.435972] [ 32.436280] dump_stack_lvl+0x91/0xf0 [ 32.436785] print_report+0xcc/0x620 [ 32.437287] ? __virt_addr_valid+0x102/0x340 [ 32.437859] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.438486] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.439113] kasan_report+0xbe/0xf0 [ 32.439616] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.440271] vma_interval_tree_remove+0xc75/0xec0 [ 32.440906] vma_prepare+0xc54/0x11a0 [ 32.441395] __split_vma+0x5af/0x950 [ 32.441874] ? __pfx___split_vma+0x10/0x10 [ 32.442405] ? find_held_lock+0x2c/0x110 [ 32.442942] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.443523] ? lock_is_held_type+0x9f/0x120 [ 32.444106] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.444739] ? mtree_range_walk+0x632/0x900 [ 32.445308] ? mas_walk+0x5c7/0x7c0 [ 32.445803] do_vmi_munmap+0x1f1/0x2b0 [ 32.446341] mmap_region+0x1f9/0x2660 [ 32.446854] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.447379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.448126] ? __pfx_lock_acquire+0x10/0x10 [ 32.448670] ? __pfx_mmap_region+0x10/0x10 [ 32.449226] ? security_mmap_addr+0x7d/0xa0 [ 32.449785] ? get_unmapped_area+0x1f5/0x3f0 [ 32.450360] do_mmap+0x854/0xf00 [ 32.450804] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.451323] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.451927] ksys_mmap_pgoff+0x3af/0x500 [ 32.452448] do_syscall_64+0x3f/0x90 [ 32.452932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.453575] RIP: 0033:0x7fab63584d82 [ 32.454033] 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 [ 32.456360] RSP: 002b:00007ffe51aecd68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.457315] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab63584d82 [ 32.458204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab629be000 [ 32.459069] RBP: 00007fab629be000 R08: 0000000000000009 R09: 0000000000001000 [ 32.459977] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561fd151dec0 [ 32.460853] R13: 00007ffe51aecd80 R14: 00007ffe51aecdb0 R15: 00007ffe51aed110 [ 32.461723] [ 32.462029] [ 32.462249] Allocated by task 212: [ 32.462697] kasan_save_stack+0x22/0x50 [ 32.463215] kasan_set_track+0x25/0x30 [ 32.463750] __kasan_slab_alloc+0x59/0x70 [ 32.464307] kmem_cache_alloc+0x16b/0x370 [ 32.464833] vm_area_dup+0x20/0x160 [ 32.465289] __split_vma+0x170/0x950 [ 32.465768] split_vma+0xc6/0x110 [ 32.466222] mprotect_fixup+0x8d2/0xb30 [ 32.466726] do_mprotect_pkey+0x87e/0xd40 [ 32.467244] __x64_sys_mprotect+0x78/0xc0 [ 32.467776] do_syscall_64+0x3f/0x90 [ 32.468307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.468975] [ 32.469199] Freed by task 212: [ 32.469620] kasan_save_stack+0x22/0x50 [ 32.470141] kasan_set_track+0x25/0x30 [ 32.470649] kasan_save_free_info+0x2b/0x50 [ 32.471206] __kasan_slab_free+0x10a/0x190 [ 32.471779] kmem_cache_free+0x10d/0x4d0 [ 32.472333] rcu_core+0x8c8/0x2860 [ 32.472790] __do_softirq+0x1b7/0x7d4 [ 32.473277] [ 32.473491] Last potentially related work creation: [ 32.474103] kasan_save_stack+0x22/0x50 [ 32.474621] __kasan_record_aux_stack+0x8e/0xa0 [ 32.475236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.476023] remove_vma+0x139/0x170 [ 32.476510] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.477087] do_vmi_munmap+0x1f1/0x2b0 [ 32.477600] __vm_munmap+0x138/0x3a0 [ 32.478090] __x64_sys_munmap+0x59/0x80 [ 32.478609] do_syscall_64+0x3f/0x90 [ 32.479094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.479751] [ 32.479988] The buggy address belongs to the object at ffff8880145d4cb0 [ 32.479988] which belongs to the cache vm_area_struct of size 168 [ 32.481469] The buggy address is located 88 bytes inside of [ 32.481469] freed 168-byte region [ffff8880145d4cb0, ffff8880145d4d58) [ 32.482887] [ 32.483105] The buggy address belongs to the physical page: [ 32.483769] page:000000009d3708b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145d4 [ 32.484871] memcg:ffff88800e936f01 [ 32.485301] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.485953] page_type: 0xffffffff() [ 32.486404] raw: 0100000000000200 ffff88800879fc80 ffffea000037c600 dead000000000008 [ 32.487334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e936f01 [ 32.488274] page dumped because: kasan: bad access detected [ 32.488940] [ 32.489155] Memory state around the buggy address: [ 32.489734] ffff8880145d4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.490598] ffff8880145d4c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.491461] >ffff8880145d4d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.492343] ^ [ 32.492787] ffff8880145d4d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.493666] ffff8880145d4e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 32.494540] ================================================================== [ 32.495503] Disabling lock debugging due to kernel taint [ 34.635606] BUG: Bad rss-counter state mm:00000000771415c4 type:MM_FILEPAGES val:33 [ 34.636817] BUG: Bad rss-counter state mm:00000000771415c4 type:MM_ANONPAGES val:22 [ 35.111444] BUG: Bad rss-counter state mm:00000000e6c02b99 type:MM_FILEPAGES val:33 [ 35.112695] BUG: Bad rss-counter state mm:00000000e6c02b99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61156' (ECDSA) to the list of known hosts. 2023/06/19 22:44:06 fuzzer started 2023/06/19 22:44:06 dialing manager at localhost:44161 2023/06/19 22:44:06 checking machine... 2023/06/19 22:44:06 checking revisions... [ 35.769000] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:44:07 testing simple program... [ 35.813116] cgroup: Unknown subsys name 'net' [ 35.855274] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:44:05 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000004 RSI=0000000000000244 RDI=ffff888019c024c0 RBP=0000000000000000 RSP=ffff8880147cf6e8 R8 =ffffffff8386da4e R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff888008f7d000 R14=ffffffff85b76940 R15=ffff88800e089600 RIP=ffffffff8451da82 RFL=00000297 [--S-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 00007fac060d2900 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=00007ffefd35d000 CR3=000000000fd20000 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=00007f5c5a30ac90 CR3=000000000f6b8000 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=34343a3232203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000