syzkaller login: [ 31.864254] BUG: Bad rss-counter state mm:00000000e281cc3a type:MM_FILEPAGES val:33 [ 31.865740] BUG: Bad rss-counter state mm:00000000e281cc3a type:MM_ANONPAGES val:22 [ 32.038185] ================================================================== [ 32.039284] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.040410] Read of size 8 at addr ffff888014698798 by task sshd/221 [ 32.041425] [ 32.041687] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.042716] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.043922] Call Trace: [ 32.044307] [ 32.044646] dump_stack_lvl+0x91/0xf0 [ 32.045250] print_report+0xcc/0x620 [ 32.045848] ? __virt_addr_valid+0x102/0x340 [ 32.046535] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.047296] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.048079] kasan_report+0xbe/0xf0 [ 32.048665] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.049303] vma_interval_tree_remove+0xc75/0xec0 [ 32.049910] vma_prepare+0xc54/0x11a0 [ 32.050393] __split_vma+0x5af/0x950 [ 32.050869] ? __pfx___split_vma+0x10/0x10 [ 32.051415] ? find_held_lock+0x2c/0x110 [ 32.051947] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.052515] ? lock_is_held_type+0x9f/0x120 [ 32.053052] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.053660] ? mtree_range_walk+0x632/0x900 [ 32.054220] ? mas_walk+0x5c7/0x7c0 [ 32.054700] do_vmi_munmap+0x1f1/0x2b0 [ 32.055196] mmap_region+0x1f9/0x2660 [ 32.055702] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.056229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.056946] ? __pfx_lock_acquire+0x10/0x10 [ 32.057481] ? __pfx_mmap_region+0x10/0x10 [ 32.058014] ? security_mmap_addr+0x7d/0xa0 [ 32.058554] ? get_unmapped_area+0x1f5/0x3f0 [ 32.059104] do_mmap+0x854/0xf00 [ 32.059545] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.060059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.060629] ksys_mmap_pgoff+0x3af/0x500 [ 32.061149] do_syscall_64+0x3f/0x90 [ 32.061629] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.062283] RIP: 0033:0x7f8c66601d82 [ 32.062744] 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 [ 32.064905] RSP: 002b:00007ffcbc100518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.065826] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8c66601d82 [ 32.066702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8c65a3b000 [ 32.067576] RBP: 00007f8c65a3b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.068455] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed2c8cfec0 [ 32.069303] R13: 00007ffcbc100530 R14: 00007ffcbc100560 R15: 00007ffcbc1008c0 [ 32.070171] [ 32.070464] [ 32.070681] Allocated by task 214: [ 32.071118] kasan_save_stack+0x22/0x50 [ 32.071621] kasan_set_track+0x25/0x30 [ 32.072128] __kasan_slab_alloc+0x59/0x70 [ 32.072670] kmem_cache_alloc+0x16b/0x370 [ 32.073197] vm_area_dup+0x20/0x160 [ 32.073657] __split_vma+0x170/0x950 [ 32.074123] split_vma+0xc6/0x110 [ 32.074569] mprotect_fixup+0x8d2/0xb30 [ 32.075070] do_mprotect_pkey+0x87e/0xd40 [ 32.075599] __x64_sys_mprotect+0x78/0xc0 [ 32.076141] do_syscall_64+0x3f/0x90 [ 32.076628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.077296] [ 32.077514] Freed by task 214: [ 32.077919] kasan_save_stack+0x22/0x50 [ 32.078441] kasan_set_track+0x25/0x30 [ 32.078941] kasan_save_free_info+0x2b/0x50 [ 32.079485] __kasan_slab_free+0x10a/0x190 [ 32.080031] kmem_cache_free+0x10d/0x4d0 [ 32.080544] rcu_core+0x8c8/0x2860 [ 32.080997] __do_softirq+0x1b7/0x7d4 [ 32.081495] [ 32.081723] Last potentially related work creation: [ 32.082322] kasan_save_stack+0x22/0x50 [ 32.082831] __kasan_record_aux_stack+0x8e/0xa0 [ 32.083415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.084068] remove_vma+0x139/0x170 [ 32.084542] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.085119] do_vmi_munmap+0x1f1/0x2b0 [ 32.085615] __vm_munmap+0x138/0x3a0 [ 32.086090] __x64_sys_munmap+0x59/0x80 [ 32.086613] do_syscall_64+0x3f/0x90 [ 32.087090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.087746] [ 32.087967] The buggy address belongs to the object at ffff888014698740 [ 32.087967] which belongs to the cache vm_area_struct of size 168 [ 32.089439] The buggy address is located 88 bytes inside of [ 32.089439] freed 168-byte region [ffff888014698740, ffff8880146987e8) [ 32.090845] [ 32.091063] The buggy address belongs to the physical page: [ 32.091727] page:000000005b1bee68 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14698 [ 32.092856] memcg:ffff888015dc8d01 [ 32.093287] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.093930] page_type: 0xffffffff() [ 32.094383] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.095317] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015dc8d01 [ 32.096248] page dumped because: kasan: bad access detected [ 32.096911] [ 32.097131] Memory state around the buggy address: [ 32.097709] ffff888014698680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.098573] ffff888014698700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.099434] >ffff888014698780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.100305] ^ [ 32.100805] ffff888014698800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.101658] ffff888014698880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.102512] ================================================================== [ 32.103564] Disabling lock debugging due to kernel taint [ 34.275377] BUG: Bad rss-counter state mm:00000000a73b2e27 type:MM_FILEPAGES val:33 [ 34.276492] BUG: Bad rss-counter state mm:00000000a73b2e27 type:MM_ANONPAGES val:22 [ 34.839954] BUG: Bad rss-counter state mm:00000000cc5065e2 type:MM_FILEPAGES val:33 [ 34.841130] BUG: Bad rss-counter state mm:00000000cc5065e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2973' (ECDSA) to the list of known hosts. 2023/06/19 11:10:34 fuzzer started 2023/06/19 11:10:34 dialing manager at localhost:44161 2023/06/19 11:10:34 checking machine... 2023/06/19 11:10:34 checking revisions... [ 35.448656] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:10:34 testing simple program... [ 35.503129] cgroup: Unknown subsys name 'net' [ 35.551399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:10:33 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=00007f3164d6d2b0 CR3=000000000cbb6000 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=d2e460d12b044381df448bb962673f8f XMM02=2c67c8bc2e329bc3000000000011d5d8 XMM03=fb795ef6d65770560000000000124380 XMM04=d9608caf8e2cc3d900000000000ae988 XMM05=90ade6bdacaf61d50000000000134cb8 XMM06=c291bd5c70af25b90000000000133d58 XMM07=e042d86d42eb936e0000000000124600 XMM08=a20b7f0c9c2312a8000000000011d638 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=ffff888008c58400 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=00007fe1923df618 CR3=0000000016a5c000 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=2034333a30313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a30313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000