syzkaller login: [ 33.483736] BUG: Bad rss-counter state mm:00000000dd6ebd3f type:MM_FILEPAGES val:33 [ 33.485103] BUG: Bad rss-counter state mm:00000000dd6ebd3f type:MM_ANONPAGES val:22 [ 33.533038] ================================================================== [ 33.533973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.534922] Read of size 8 at addr ffff88800f5fc6b0 by task sshd/221 [ 33.535684] [ 33.535909] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.536799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.537784] Call Trace: [ 33.538107] [ 33.538394] dump_stack_lvl+0x91/0xf0 [ 33.538895] print_report+0xcc/0x620 [ 33.539380] ? __virt_addr_valid+0x102/0x340 [ 33.539941] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.540569] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.541199] kasan_report+0xbe/0xf0 [ 33.541681] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.542297] vma_interval_tree_remove+0xc75/0xec0 [ 33.542906] vma_prepare+0xc54/0x11a0 [ 33.543385] __split_vma+0x5af/0x950 [ 33.543855] ? __pfx___split_vma+0x10/0x10 [ 33.544385] ? find_held_lock+0x2c/0x110 [ 33.545125] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.545698] ? lock_is_held_type+0x9f/0x120 [ 33.546244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.546867] ? mtree_range_walk+0x632/0x900 [ 33.547436] ? mas_walk+0x5c7/0x7c0 [ 33.547910] do_vmi_munmap+0x1f1/0x2b0 [ 33.548412] mmap_region+0x1f9/0x2660 [ 33.548913] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.549426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.550152] ? __pfx_lock_acquire+0x10/0x10 [ 33.550691] ? __pfx_mmap_region+0x10/0x10 [ 33.551224] ? security_mmap_addr+0x7d/0xa0 [ 33.551757] ? get_unmapped_area+0x1f5/0x3f0 [ 33.552311] do_mmap+0x854/0xf00 [ 33.552769] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.553268] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.553832] ksys_mmap_pgoff+0x3af/0x500 [ 33.554344] do_syscall_64+0x3f/0x90 [ 33.554829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.555477] RIP: 0033:0x7fb7855b2d82 [ 33.555943] 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 [ 33.558103] RSP: 002b:00007ffe4862a8c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.559010] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7855b2d82 [ 33.559872] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7849ec000 [ 33.560738] RBP: 00007fb7849ec000 R08: 0000000000000009 R09: 0000000000001000 [ 33.561590] R10: 0000000000000812 R11: 0000000000000206 R12: 000055792b406f60 [ 33.562433] R13: 00007ffe4862a8e0 R14: 00007ffe4862a910 R15: 00007ffe4862ac70 [ 33.563285] [ 33.563582] [ 33.563798] Allocated by task 214: [ 33.564239] kasan_save_stack+0x22/0x50 [ 33.564787] kasan_set_track+0x25/0x30 [ 33.565284] __kasan_slab_alloc+0x59/0x70 [ 33.565816] kmem_cache_alloc+0x16b/0x370 [ 33.566328] vm_area_dup+0x20/0x160 [ 33.566786] __split_vma+0x170/0x950 [ 33.567249] split_vma+0xc6/0x110 [ 33.567687] mprotect_fixup+0x8d2/0xb30 [ 33.568188] do_mprotect_pkey+0x87e/0xd40 [ 33.568743] __x64_sys_mprotect+0x78/0xc0 [ 33.569278] do_syscall_64+0x3f/0x90 [ 33.569754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.570431] [ 33.570654] Freed by task 214: [ 33.571051] kasan_save_stack+0x22/0x50 [ 33.571557] kasan_set_track+0x25/0x30 [ 33.572054] kasan_save_free_info+0x2b/0x50 [ 33.572591] __kasan_slab_free+0x10a/0x190 [ 33.573159] kmem_cache_free+0x10d/0x4d0 [ 33.573668] rcu_core+0x8c8/0x2860 [ 33.574116] __do_softirq+0x1b7/0x7d4 [ 33.574608] [ 33.574837] Last potentially related work creation: [ 33.575469] kasan_save_stack+0x22/0x50 [ 33.575957] __kasan_record_aux_stack+0x8e/0xa0 [ 33.576505] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.577146] remove_vma+0x139/0x170 [ 33.577580] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.578116] do_vmi_munmap+0x1f1/0x2b0 [ 33.578596] __vm_munmap+0x138/0x3a0 [ 33.579040] __x64_sys_munmap+0x59/0x80 [ 33.579511] do_syscall_64+0x3f/0x90 [ 33.579963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.580600] [ 33.580818] The buggy address belongs to the object at ffff88800f5fc658 [ 33.580818] which belongs to the cache vm_area_struct of size 168 [ 33.582216] The buggy address is located 88 bytes inside of [ 33.582216] freed 168-byte region [ffff88800f5fc658, ffff88800f5fc700) [ 33.583566] [ 33.583798] The buggy address belongs to the physical page: [ 33.584496] page:00000000191762ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf5fc [ 33.585621] memcg:ffff88800d69e301 [ 33.586059] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.586732] page_type: 0xffffffff() [ 33.587192] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.588210] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d69e301 [ 33.589153] page dumped because: kasan: bad access detected [ 33.589829] [ 33.590048] Memory state around the buggy address: [ 33.590640] ffff88800f5fc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.591506] ffff88800f5fc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.592381] >ffff88800f5fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.593268] ^ [ 33.593854] ffff88800f5fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.594707] ffff88800f5fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.595564] ================================================================== [ 33.596486] Disabling lock debugging due to kernel taint [ 36.612695] BUG: Bad rss-counter state mm:000000002be92105 type:MM_FILEPAGES val:33 [ 36.613760] BUG: Bad rss-counter state mm:000000002be92105 type:MM_ANONPAGES val:22 [ 37.015346] BUG: Bad rss-counter state mm:00000000f8728a0b type:MM_FILEPAGES val:33 [ 37.017401] BUG: Bad rss-counter state mm:00000000f8728a0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33015' (ECDSA) to the list of known hosts. 2023/06/19 12:54:18 fuzzer started 2023/06/19 12:54:18 dialing manager at localhost:44161 2023/06/19 12:54:18 checking machine... 2023/06/19 12:54:18 checking revisions... [ 37.778510] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:54:18 testing simple program... [ 37.827938] cgroup: Unknown subsys name 'net' [ 37.883521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:54:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc8d3f5c0b0 CR3=0000000019e3e000 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=34353a3231203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363230 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=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8363dd1b RDX=00000000000263dd RSI=00000000000263dd RDI=ffffffff86580b34 RBP=ffff888016c4f990 RSP=ffff888016c4f8c8 R8 =0000000000000000 R9 =ffff888016c4f978 R10=0000000000038001 R11=000000000008a6be R12=ffff888016c4f998 R13=ffff888016c4f980 R14=ffff888016c4f979 R15=ffff888016c4f938 RIP=ffffffff8113077a 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 00007fc8d39a4900 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=00007fc8d3f5b618 CR3=00000000146e2000 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=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