syzkaller login: [ 32.083141] BUG: Bad rss-counter state mm:0000000076a3751a type:MM_FILEPAGES val:33 [ 32.084763] BUG: Bad rss-counter state mm:0000000076a3751a type:MM_ANONPAGES val:22 [ 32.231821] ================================================================== [ 32.232870] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.234031] Read of size 8 at addr ffff88800fc4b6b0 by task sshd/220 [ 32.234799] [ 32.235015] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.235907] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.236901] Call Trace: [ 32.237226] [ 32.237510] dump_stack_lvl+0x91/0xf0 [ 32.238017] print_report+0xcc/0x620 [ 32.238502] ? __virt_addr_valid+0x102/0x340 [ 32.239055] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.239690] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.240337] kasan_report+0xbe/0xf0 [ 32.240828] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.241476] vma_interval_tree_remove+0xc75/0xec0 [ 32.242086] vma_prepare+0xc54/0x11a0 [ 32.242579] __split_vma+0x5af/0x950 [ 32.243053] ? __pfx___split_vma+0x10/0x10 [ 32.243592] ? find_held_lock+0x2c/0x110 [ 32.244139] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.244705] ? lock_is_held_type+0x9f/0x120 [ 32.245256] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.245863] ? mtree_range_walk+0x632/0x900 [ 32.246422] ? mas_walk+0x5c7/0x7c0 [ 32.246902] do_vmi_munmap+0x1f1/0x2b0 [ 32.247402] mmap_region+0x1f9/0x2660 [ 32.247888] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.248416] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.249150] ? __pfx_lock_acquire+0x10/0x10 [ 32.249690] ? __pfx_mmap_region+0x10/0x10 [ 32.250221] ? security_mmap_addr+0x7d/0xa0 [ 32.250756] ? get_unmapped_area+0x1f5/0x3f0 [ 32.251306] do_mmap+0x854/0xf00 [ 32.251750] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.252247] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.252815] ksys_mmap_pgoff+0x3af/0x500 [ 32.253331] do_syscall_64+0x3f/0x90 [ 32.253806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.254458] RIP: 0033:0x7f6bd6372d82 [ 32.254921] 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 [ 32.257076] RSP: 002b:00007ffca8a39f08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.257972] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6bd6372d82 [ 32.258809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6bd57ac000 [ 32.259662] RBP: 00007f6bd57ac000 R08: 0000000000000009 R09: 0000000000001000 [ 32.260523] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ecea476ec0 [ 32.261375] R13: 00007ffca8a39f20 R14: 00007ffca8a39f50 R15: 00007ffca8a3a2b0 [ 32.262235] [ 32.262527] [ 32.262740] Allocated by task 213: [ 32.263171] kasan_save_stack+0x22/0x50 [ 32.263679] kasan_set_track+0x25/0x30 [ 32.264181] __kasan_slab_alloc+0x59/0x70 [ 32.264704] kmem_cache_alloc+0x16b/0x370 [ 32.265217] vm_area_dup+0x20/0x160 [ 32.265671] __split_vma+0x170/0x950 [ 32.266142] split_vma+0xc6/0x110 [ 32.266580] mprotect_fixup+0x8d2/0xb30 [ 32.267080] do_mprotect_pkey+0x87e/0xd40 [ 32.267596] __x64_sys_mprotect+0x78/0xc0 [ 32.268129] do_syscall_64+0x3f/0x90 [ 32.268607] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.269247] [ 32.269462] Freed by task 213: [ 32.269852] kasan_save_stack+0x22/0x50 [ 32.270354] kasan_set_track+0x25/0x30 [ 32.270842] kasan_save_free_info+0x2b/0x50 [ 32.271371] __kasan_slab_free+0x10a/0x190 [ 32.271899] kmem_cache_free+0x10d/0x4d0 [ 32.272410] rcu_core+0x8c8/0x2860 [ 32.272855] __do_softirq+0x1b7/0x7d4 [ 32.273326] [ 32.273540] Last potentially related work creation: [ 32.274126] kasan_save_stack+0x22/0x50 [ 32.274634] __kasan_record_aux_stack+0x8e/0xa0 [ 32.275458] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.276281] remove_vma+0x139/0x170 [ 32.276833] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.277524] do_vmi_munmap+0x1f1/0x2b0 [ 32.278106] __vm_munmap+0x138/0x3a0 [ 32.278701] __x64_sys_munmap+0x59/0x80 [ 32.279308] do_syscall_64+0x3f/0x90 [ 32.279883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.280651] [ 32.280870] The buggy address belongs to the object at ffff88800fc4b658 [ 32.280870] which belongs to the cache vm_area_struct of size 168 [ 32.282335] The buggy address is located 88 bytes inside of [ 32.282335] freed 168-byte region [ffff88800fc4b658, ffff88800fc4b700) [ 32.283781] [ 32.283996] The buggy address belongs to the physical page: [ 32.284680] page:00000000c75a3e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc4b [ 32.285765] memcg:ffff88800ef87a01 [ 32.286202] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.286857] page_type: 0xffffffff() [ 32.287314] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.288260] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef87a01 [ 32.289174] page dumped because: kasan: bad access detected [ 32.289836] [ 32.290052] Memory state around the buggy address: [ 32.290637] ffff88800fc4b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.291554] ffff88800fc4b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 32.292425] >ffff88800fc4b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.293280] ^ [ 32.293881] ffff88800fc4b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.294755] ffff88800fc4b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.295618] ================================================================== [ 32.296675] Disabling lock debugging due to kernel taint [ 34.264579] BUG: Bad rss-counter state mm:0000000062ebf32a type:MM_FILEPAGES val:33 [ 34.265623] BUG: Bad rss-counter state mm:0000000062ebf32a type:MM_ANONPAGES val:22 [ 34.778535] BUG: Bad rss-counter state mm:000000000c9e49d4 type:MM_FILEPAGES val:33 [ 34.779561] BUG: Bad rss-counter state mm:000000000c9e49d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27527' (ECDSA) to the list of known hosts. 2023/06/19 18:31:47 fuzzer started 2023/06/19 18:31:47 dialing manager at localhost:44161 2023/06/19 18:31:47 checking machine... 2023/06/19 18:31:47 checking revisions... [ 35.497812] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:31:47 testing simple program... [ 35.535827] cgroup: Unknown subsys name 'net' [ 35.576379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880168cfe00 RCX=ffffffff845269da RDX=1ffff1100332942a RSI=ffff8880168cfdb0 RDI=ffff8880168cfe00 RBP=ffff8880168cfe20 RSP=ffff8880168cfbc8 R8 =0000000000000001 R9 =ffffed100332942a R10=ffff88801994a157 R11=0000000000000000 R12=0000000000000000 R13=ffff88801994a148 R14=ffff8880168cfdb0 R15=ffff8880168cfe00 RIP=ffffffff81af9525 RFL=00000286 [--S--P-] 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 00007faf17cfa700 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=00007f406f90f0b0 CR3=000000000c5c0000 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=2037343a31333a3831203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a31333a3831203931 XMM08=3d656e696c646d632022656369767265 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=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=00007f099f3bb1d0 CR3=000000000de24000 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=d48383756695f9b3674ae2f737b986f1 XMM02=000000000011d0e0eff9b2d0a8fce9cb XMM03=000000000011d1b02c67c8bc2e329bc3 XMM04=dd6bee168741975200000000000ae988 XMM05=f12b2d544a5326810000000000135410 XMM06=4fda316b135da52b00000000001344b0 XMM07=e042d86d42eb936e0000000000124d50 XMM08=759c2019bd8db001000000000011d1b0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000