syzkaller login: [ 31.986870] BUG: Bad rss-counter state mm:00000000e54e7a20 type:MM_FILEPAGES val:33 [ 31.988117] BUG: Bad rss-counter state mm:00000000e54e7a20 type:MM_ANONPAGES val:22 [ 32.032444] ================================================================== [ 32.033505] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.034532] Read of size 8 at addr ffff888016b1d310 by task sshd/220 [ 32.035494] [ 32.035713] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.036587] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.037706] Call Trace: [ 32.038096] [ 32.038461] dump_stack_lvl+0x91/0xf0 [ 32.039054] print_report+0xcc/0x620 [ 32.039700] ? __virt_addr_valid+0x102/0x340 [ 32.040397] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.041134] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.041885] kasan_report+0xbe/0xf0 [ 32.042473] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.043234] vma_interval_tree_remove+0xc75/0xec0 [ 32.043981] vma_prepare+0xc54/0x11a0 [ 32.044583] __split_vma+0x5af/0x950 [ 32.045151] ? __pfx___split_vma+0x10/0x10 [ 32.045803] ? find_held_lock+0x2c/0x110 [ 32.046445] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.047133] ? lock_is_held_type+0x9f/0x120 [ 32.047852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.048634] ? mtree_range_walk+0x632/0x900 [ 32.049354] ? mas_walk+0x5c7/0x7c0 [ 32.049953] do_vmi_munmap+0x1f1/0x2b0 [ 32.050580] mmap_region+0x1f9/0x2660 [ 32.051208] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.051854] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.052602] ? __pfx_lock_acquire+0x10/0x10 [ 32.053145] ? __pfx_mmap_region+0x10/0x10 [ 32.053707] ? security_mmap_addr+0x7d/0xa0 [ 32.054251] ? get_unmapped_area+0x1f5/0x3f0 [ 32.054826] do_mmap+0x854/0xf00 [ 32.055294] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.055793] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.056391] ksys_mmap_pgoff+0x3af/0x500 [ 32.056902] do_syscall_64+0x3f/0x90 [ 32.057398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.058051] RIP: 0033:0x7f028fb11d82 [ 32.058523] 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 [ 32.060714] RSP: 002b:00007ffe4ba0d568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.061645] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f028fb11d82 [ 32.062513] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f028ef4b000 [ 32.063387] RBP: 00007f028ef4b000 R08: 0000000000000009 R09: 0000000000001000 [ 32.064236] R10: 0000000000000812 R11: 0000000000000206 R12: 00005622517ad980 [ 32.065120] R13: 00007ffe4ba0d580 R14: 00007ffe4ba0d5b0 R15: 00007ffe4ba0d910 [ 32.066007] [ 32.066321] [ 32.066540] Allocated by task 213: [ 32.066982] kasan_save_stack+0x22/0x50 [ 32.067528] kasan_set_track+0x25/0x30 [ 32.068039] __kasan_slab_alloc+0x59/0x70 [ 32.068583] kmem_cache_alloc+0x16b/0x370 [ 32.069115] vm_area_dup+0x20/0x160 [ 32.069589] __split_vma+0x170/0x950 [ 32.070073] split_vma+0xc6/0x110 [ 32.070542] mprotect_fixup+0x8d2/0xb30 [ 32.071055] do_mprotect_pkey+0x87e/0xd40 [ 32.071613] __x64_sys_mprotect+0x78/0xc0 [ 32.072140] do_syscall_64+0x3f/0x90 [ 32.072633] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.073346] [ 32.073565] Freed by task 213: [ 32.073963] kasan_save_stack+0x22/0x50 [ 32.074500] kasan_set_track+0x25/0x30 [ 32.075000] kasan_save_free_info+0x2b/0x50 [ 32.075653] __kasan_slab_free+0x10a/0x190 [ 32.076363] kmem_cache_free+0x10d/0x4d0 [ 32.077046] rcu_core+0x8c8/0x2860 [ 32.077635] __do_softirq+0x1b7/0x7d4 [ 32.078268] [ 32.078552] Last potentially related work creation: [ 32.079345] kasan_save_stack+0x22/0x50 [ 32.080018] __kasan_record_aux_stack+0x8e/0xa0 [ 32.080778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.081577] remove_vma+0x139/0x170 [ 32.082042] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.082613] do_vmi_munmap+0x1f1/0x2b0 [ 32.083103] __vm_munmap+0x138/0x3a0 [ 32.083595] __x64_sys_munmap+0x59/0x80 [ 32.084099] do_syscall_64+0x3f/0x90 [ 32.084588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.085233] [ 32.085475] The buggy address belongs to the object at ffff888016b1d2b8 [ 32.085475] which belongs to the cache vm_area_struct of size 168 [ 32.086982] The buggy address is located 88 bytes inside of [ 32.086982] freed 168-byte region [ffff888016b1d2b8, ffff888016b1d360) [ 32.088458] [ 32.088680] The buggy address belongs to the physical page: [ 32.089376] page:00000000ea097d56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b1d [ 32.090483] memcg:ffff88800ca00501 [ 32.090912] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.091582] page_type: 0xffffffff() [ 32.092041] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.092978] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca00501 [ 32.093908] page dumped because: kasan: bad access detected [ 32.094608] [ 32.094828] Memory state around the buggy address: [ 32.095434] ffff888016b1d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.096307] ffff888016b1d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.097166] >ffff888016b1d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.098060] ^ [ 32.098546] ffff888016b1d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.099459] ffff888016b1d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.100327] ================================================================== [ 32.101448] Disabling lock debugging due to kernel taint [ 34.058365] BUG: Bad rss-counter state mm:000000009523aade type:MM_FILEPAGES val:33 [ 34.059579] BUG: Bad rss-counter state mm:000000009523aade type:MM_ANONPAGES val:22 [ 34.535832] BUG: Bad rss-counter state mm:000000003a9de08a type:MM_FILEPAGES val:33 [ 34.536990] BUG: Bad rss-counter state mm:000000003a9de08a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51471' (ECDSA) to the list of known hosts. 2023/06/19 23:13:48 fuzzer started 2023/06/19 23:13:48 dialing manager at localhost:44161 2023/06/19 23:13:48 checking machine... 2023/06/19 23:13:48 checking revisions... [ 35.188064] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:13:48 testing simple program... [ 35.238014] cgroup: Unknown subsys name 'net' [ 35.291535] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:13:46 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=00007ffe52783a28 CR3=0000000005482000 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=00007fc5b078151000005633d4380790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814d464c RDX=ffff88800f9551c0 RSI=0000000000000000 RDI=0000000000000005 RBP=000000007fff0000 RSP=ffff88800fe2fde8 R8 =0000000000000005 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=0000000000000000 R14=ffff88800fe2fe30 R15=000000007fff0000 RIP=ffffffff814d4653 RFL=00000206 [-----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 00007f4a26501900 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=00007ffaad366650 CR3=000000000d448000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b9a5a03f6b7778dc00000000000ae988 XMM05=c322a650ba097e010000000000134c48 XMM06=4fda316b135da52b0000000000133a38 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000