syzkaller login: [ 31.806171] BUG: Bad rss-counter state mm:000000003f422a2d type:MM_FILEPAGES val:33 [ 31.807418] BUG: Bad rss-counter state mm:000000003f422a2d type:MM_ANONPAGES val:22 [ 32.022912] ================================================================== [ 32.024200] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.025312] Read of size 8 at addr ffff888016f1ed08 by task sshd/221 [ 32.026122] [ 32.026349] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.027278] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.028302] Call Trace: [ 32.028637] [ 32.028938] dump_stack_lvl+0x91/0xf0 [ 32.029455] print_report+0xcc/0x620 [ 32.029962] ? __virt_addr_valid+0x102/0x340 [ 32.030544] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.031188] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.031833] kasan_report+0xbe/0xf0 [ 32.032330] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.032979] vma_interval_tree_remove+0xc75/0xec0 [ 32.033626] vma_prepare+0xc54/0x11a0 [ 32.034145] __split_vma+0x5af/0x950 [ 32.034667] ? __pfx___split_vma+0x10/0x10 [ 32.035235] ? find_held_lock+0x2c/0x110 [ 32.035796] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.036409] ? lock_is_held_type+0x9f/0x120 [ 32.036985] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.037646] ? mtree_range_walk+0x632/0x900 [ 32.038235] ? mas_walk+0x5c7/0x7c0 [ 32.038744] do_vmi_munmap+0x1f1/0x2b0 [ 32.039275] mmap_region+0x1f9/0x2660 [ 32.039801] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.040354] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.041114] ? __pfx_lock_acquire+0x10/0x10 [ 32.041697] ? __pfx_mmap_region+0x10/0x10 [ 32.042271] ? security_mmap_addr+0x7d/0xa0 [ 32.042844] ? get_unmapped_area+0x1f5/0x3f0 [ 32.043427] do_mmap+0x854/0xf00 [ 32.043893] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.044424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.045019] ksys_mmap_pgoff+0x3af/0x500 [ 32.045552] do_syscall_64+0x3f/0x90 [ 32.046056] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.046740] RIP: 0033:0x7f4cc793dd82 [ 32.047224] 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 [ 32.049473] RSP: 002b:00007ffe56bb94e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.050433] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4cc793dd82 [ 32.051335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4cc6d77000 [ 32.052232] RBP: 00007f4cc6d77000 R08: 0000000000000009 R09: 0000000000001000 [ 32.053130] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566bccd8f70 [ 32.054023] R13: 00007ffe56bb9500 R14: 00007ffe56bb9530 R15: 00007ffe56bb9890 [ 32.054942] [ 32.055248] [ 32.055479] Allocated by task 214: [ 32.055934] kasan_save_stack+0x22/0x50 [ 32.056468] kasan_set_track+0x25/0x30 [ 32.056989] __kasan_slab_alloc+0x59/0x70 [ 32.057542] kmem_cache_alloc+0x16b/0x370 [ 32.058089] vm_area_dup+0x20/0x160 [ 32.058568] __split_vma+0x170/0x950 [ 32.059063] split_vma+0xc6/0x110 [ 32.059525] mprotect_fixup+0x8d2/0xb30 [ 32.060046] do_mprotect_pkey+0x87e/0xd40 [ 32.060590] __x64_sys_mprotect+0x78/0xc0 [ 32.061129] do_syscall_64+0x3f/0x90 [ 32.061614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.062276] [ 32.062499] Freed by task 214: [ 32.062912] kasan_save_stack+0x22/0x50 [ 32.063424] kasan_set_track+0x25/0x30 [ 32.063928] kasan_save_free_info+0x2b/0x50 [ 32.064482] __kasan_slab_free+0x10a/0x190 [ 32.065036] kmem_cache_free+0x10d/0x4d0 [ 32.065566] rcu_core+0x8c8/0x2860 [ 32.066084] __do_softirq+0x1b7/0x7d4 [ 32.066583] [ 32.066818] Last potentially related work creation: [ 32.067419] kasan_save_stack+0x22/0x50 [ 32.067947] __kasan_record_aux_stack+0x8e/0xa0 [ 32.068538] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.069202] remove_vma+0x139/0x170 [ 32.069676] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.070256] do_vmi_munmap+0x1f1/0x2b0 [ 32.070762] __vm_munmap+0x138/0x3a0 [ 32.071248] __x64_sys_munmap+0x59/0x80 [ 32.071772] do_syscall_64+0x3f/0x90 [ 32.072270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.072930] [ 32.073154] The buggy address belongs to the object at ffff888016f1ecb0 [ 32.073154] which belongs to the cache vm_area_struct of size 168 [ 32.074666] The buggy address is located 88 bytes inside of [ 32.074666] freed 168-byte region [ffff888016f1ecb0, ffff888016f1ed58) [ 32.076112] [ 32.076340] The buggy address belongs to the physical page: [ 32.077013] page:00000000e53f9004 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f1e [ 32.078122] memcg:ffff88800deffd01 [ 32.078565] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.079226] page_type: 0xffffffff() [ 32.079682] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.080617] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800deffd01 [ 32.081555] page dumped because: kasan: bad access detected [ 32.082219] [ 32.082439] Memory state around the buggy address: [ 32.083037] ffff888016f1ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 32.083960] ffff888016f1ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.084916] >ffff888016f1ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.085848] ^ [ 32.086352] ffff888016f1ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 32.087307] ffff888016f1ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 32.088240] ================================================================== [ 32.089554] Disabling lock debugging due to kernel taint [ 34.049057] BUG: Bad rss-counter state mm:00000000201972ab type:MM_FILEPAGES val:33 [ 34.050334] BUG: Bad rss-counter state mm:00000000201972ab type:MM_ANONPAGES val:22 [ 34.619422] BUG: Bad rss-counter state mm:0000000070d3d9e3 type:MM_FILEPAGES val:33 [ 34.620597] BUG: Bad rss-counter state mm:0000000070d3d9e3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7552' (ECDSA) to the list of known hosts. 2023/06/19 15:06:36 fuzzer started 2023/06/19 15:06:36 dialing manager at localhost:44161 2023/06/19 15:06:36 checking machine... 2023/06/19 15:06:36 checking revisions... [ 35.280372] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:06:36 testing simple program... [ 35.338345] cgroup: Unknown subsys name 'net' [ 35.394379] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:06:34 Registers: info registers vcpu 0 RAX=ffff8880181cf000 RBX=0000000000000800 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000800 RDI=ffff8880181cf000 RBP=ffff88801c927cd8 RSP=ffff88801c927c80 R8 =ffff8880181cf000 R9 =0000000000000000 R10=ffff8880181cf000 R11=ffffffff81806df1 R12=ffff888008442000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8180ae79 RFL=00000246 [---Z-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 00007f608b284900 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=00007ffd502c5000 CR3=000000000c50a000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f12cbabbd20 CR3=000000000ccce000 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=2c8e6bfaa7356c9cd24fb5a7a1bf7ba3 XMM02=0000000000121bf8ec2efd57dc4c00df XMM03=0000000000124c50d3e3bb2af4fb1406 XMM04=91ee599e10d80fad00000000000ae988 XMM05=e4cb8bb95a7664b600000000001347d0 XMM06=23d07d09f37d9e450000000000133638 XMM07=e042d86d42eb936e0000000000124ed0 XMM08=d3e3bb2af4fb14060000000000121c58 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000