syzkaller login: [ 32.007720] BUG: Bad rss-counter state mm:000000009f29668b type:MM_FILEPAGES val:32 [ 32.008926] BUG: Bad rss-counter state mm:000000009f29668b type:MM_ANONPAGES val:22 [ 32.049590] ================================================================== [ 32.050573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.051509] Read of size 8 at addr ffff888016699c20 by task sshd/220 [ 32.052301] [ 32.052520] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.053368] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.054327] Call Trace: [ 32.054642] [ 32.054922] dump_stack_lvl+0x91/0xf0 [ 32.055402] print_report+0xcc/0x620 [ 32.055895] ? __virt_addr_valid+0x102/0x340 [ 32.056445] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.057054] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.057670] kasan_report+0xbe/0xf0 [ 32.058140] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.058762] vma_interval_tree_remove+0xc75/0xec0 [ 32.059354] vma_prepare+0xc54/0x11a0 [ 32.059852] __split_vma+0x5af/0x950 [ 32.060318] ? __pfx___split_vma+0x10/0x10 [ 32.060839] ? find_held_lock+0x2c/0x110 [ 32.061347] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.061905] ? lock_is_held_type+0x9f/0x120 [ 32.062436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.063028] ? mtree_range_walk+0x632/0x900 [ 32.063584] ? mas_walk+0x5c7/0x7c0 [ 32.064050] do_vmi_munmap+0x1f1/0x2b0 [ 32.064530] mmap_region+0x1f9/0x2660 [ 32.065003] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.065503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.066202] ? __pfx_lock_acquire+0x10/0x10 [ 32.066727] ? __pfx_mmap_region+0x10/0x10 [ 32.067250] ? security_mmap_addr+0x7d/0xa0 [ 32.067783] ? get_unmapped_area+0x1f5/0x3f0 [ 32.068323] do_mmap+0x854/0xf00 [ 32.068752] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.069239] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.069798] ksys_mmap_pgoff+0x3af/0x500 [ 32.070299] do_syscall_64+0x3f/0x90 [ 32.070766] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.071403] RIP: 0033:0x7f553cabad82 [ 32.071866] 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 [ 32.073936] RSP: 002b:00007fff8470de18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.074849] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553cabad82 [ 32.075696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f553bef4000 [ 32.076538] RBP: 00007f553bef4000 R08: 0000000000000009 R09: 0000000000001000 [ 32.077380] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d69ea8fec0 [ 32.078221] R13: 00007fff8470de30 R14: 00007fff8470de60 R15: 00007fff8470e1c0 [ 32.079063] [ 32.079350] [ 32.079568] Allocated by task 213: [ 32.079995] kasan_save_stack+0x22/0x50 [ 32.080492] kasan_set_track+0x25/0x30 [ 32.080981] __kasan_slab_alloc+0x59/0x70 [ 32.081497] kmem_cache_alloc+0x16b/0x370 [ 32.082016] vm_area_dup+0x20/0x160 [ 32.082466] __split_vma+0x170/0x950 [ 32.082931] split_vma+0xc6/0x110 [ 32.083373] mprotect_fixup+0x8d2/0xb30 [ 32.083894] do_mprotect_pkey+0x87e/0xd40 [ 32.084411] __x64_sys_mprotect+0x78/0xc0 [ 32.084919] do_syscall_64+0x3f/0x90 [ 32.085409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.086038] [ 32.086268] Freed by task 213: [ 32.086657] kasan_save_stack+0x22/0x50 [ 32.087155] kasan_set_track+0x25/0x30 [ 32.087650] kasan_save_free_info+0x2b/0x50 [ 32.088185] __kasan_slab_free+0x10a/0x190 [ 32.088708] kmem_cache_free+0x10d/0x4d0 [ 32.089207] rcu_core+0x8c8/0x2860 [ 32.089640] __do_softirq+0x1b7/0x7d4 [ 32.090109] [ 32.090320] Last potentially related work creation: [ 32.090902] kasan_save_stack+0x22/0x50 [ 32.091449] __kasan_record_aux_stack+0x8e/0xa0 [ 32.092012] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.092646] remove_vma+0x139/0x170 [ 32.093088] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.093636] do_vmi_munmap+0x1f1/0x2b0 [ 32.094117] __vm_munmap+0x138/0x3a0 [ 32.094575] __x64_sys_munmap+0x59/0x80 [ 32.095062] do_syscall_64+0x3f/0x90 [ 32.095540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.096167] [ 32.096381] The buggy address belongs to the object at ffff888016699bc8 [ 32.096381] which belongs to the cache vm_area_struct of size 168 [ 32.097830] The buggy address is located 88 bytes inside of [ 32.097830] freed 168-byte region [ffff888016699bc8, ffff888016699c70) [ 32.099235] [ 32.099455] The buggy address belongs to the physical page: [ 32.100210] page:0000000035126bce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16699 [ 32.101390] memcg:ffff888018f3bf01 [ 32.101861] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.102574] page_type: 0xffffffff() [ 32.103067] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.104107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f3bf01 [ 32.105099] page dumped because: kasan: bad access detected [ 32.105850] [ 32.106083] Memory state around the buggy address: [ 32.106722] ffff888016699b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.107675] ffff888016699b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.108622] >ffff888016699c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.109570] ^ [ 32.110166] ffff888016699c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.111106] ffff888016699d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.112051] ================================================================== [ 32.113056] Disabling lock debugging due to kernel taint [ 34.066545] BUG: Bad rss-counter state mm:00000000d4f56c70 type:MM_FILEPAGES val:33 [ 34.067741] BUG: Bad rss-counter state mm:00000000d4f56c70 type:MM_ANONPAGES val:22 [ 34.546535] BUG: Bad rss-counter state mm:00000000df827b64 type:MM_FILEPAGES val:33 [ 34.547569] BUG: Bad rss-counter state mm:00000000df827b64 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34103' (ECDSA) to the list of known hosts. 2023/06/19 11:23:23 fuzzer started 2023/06/19 11:23:23 dialing manager at localhost:44161 2023/06/19 11:23:23 checking machine... 2023/06/19 11:23:23 checking revisions... [ 35.288038] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:23:23 testing simple program... [ 35.322669] cgroup: Unknown subsys name 'net' [ 35.364131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:23:22 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=00007f1403d40ed0 CR3=0000000016668000 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=2032323a33323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a33323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=ffff888016adefe0 RSI=0000000000000000 RDI=ffff88806cf09a80 RBP=ffff88806cf09b08 RSP=ffff88806cf09a60 R8 =ffffffff864bb032 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888009fad1c0 R15=ffff88806cf09a70 RIP=ffffffff81130937 RFL=00000282 [--S----] 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 00007f26ce171900 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=00007f26ce136008 CR3=000000000f1c8000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000