syzkaller login: [ 30.270894] BUG: Bad rss-counter state mm:000000007361a0a6 type:MM_FILEPAGES val:33 [ 30.272782] BUG: Bad rss-counter state mm:000000007361a0a6 type:MM_ANONPAGES val:22 [ 30.444680] ================================================================== [ 30.445760] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.446889] Read of size 8 at addr ffff888016ae8a50 by task sshd/219 [ 30.447917] [ 30.448217] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.449245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.450409] Call Trace: [ 30.450804] [ 30.451190] dump_stack_lvl+0x91/0xf0 [ 30.451735] print_report+0xcc/0x620 [ 30.452216] ? __virt_addr_valid+0x102/0x340 [ 30.452769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.453393] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.454012] kasan_report+0xbe/0xf0 [ 30.454490] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.455118] vma_interval_tree_remove+0xc75/0xec0 [ 30.455724] vma_prepare+0xc54/0x11a0 [ 30.456205] __split_vma+0x5af/0x950 [ 30.456691] ? __pfx___split_vma+0x10/0x10 [ 30.457223] ? find_held_lock+0x2c/0x110 [ 30.457749] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.458320] ? lock_is_held_type+0x9f/0x120 [ 30.458888] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.459502] ? mtree_range_walk+0x632/0x900 [ 30.460065] ? mas_walk+0x5c7/0x7c0 [ 30.460542] do_vmi_munmap+0x1f1/0x2b0 [ 30.461037] mmap_region+0x1f9/0x2660 [ 30.461523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.462047] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.462764] ? __pfx_lock_acquire+0x10/0x10 [ 30.463324] ? __pfx_mmap_region+0x10/0x10 [ 30.463870] ? security_mmap_addr+0x7d/0xa0 [ 30.464402] ? get_unmapped_area+0x1f5/0x3f0 [ 30.464960] do_mmap+0x854/0xf00 [ 30.465405] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.465901] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.466470] ksys_mmap_pgoff+0x3af/0x500 [ 30.466990] do_syscall_64+0x3f/0x90 [ 30.467477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.468123] RIP: 0033:0x7f2eac78ad82 [ 30.468582] 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 [ 30.470705] RSP: 002b:00007fff9c73ccb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.471616] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2eac78ad82 [ 30.472465] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2eabbc4000 [ 30.473313] RBP: 00007f2eabbc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.474162] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555891c86f70 [ 30.475033] R13: 00007fff9c73ccd0 R14: 00007fff9c73cd00 R15: 00007fff9c73d060 [ 30.475888] [ 30.476182] [ 30.476400] Allocated by task 212: [ 30.476835] kasan_save_stack+0x22/0x50 [ 30.477342] kasan_set_track+0x25/0x30 [ 30.477845] __kasan_slab_alloc+0x59/0x70 [ 30.478369] kmem_cache_alloc+0x16b/0x370 [ 30.478898] vm_area_dup+0x20/0x160 [ 30.479359] __split_vma+0x170/0x950 [ 30.479829] split_vma+0xc6/0x110 [ 30.480268] mprotect_fixup+0x8d2/0xb30 [ 30.480777] do_mprotect_pkey+0x87e/0xd40 [ 30.481301] __x64_sys_mprotect+0x78/0xc0 [ 30.481828] do_syscall_64+0x3f/0x90 [ 30.482302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.482971] [ 30.483190] Freed by task 212: [ 30.483584] kasan_save_stack+0x22/0x50 [ 30.484090] kasan_set_track+0x25/0x30 [ 30.484583] kasan_save_free_info+0x2b/0x50 [ 30.485127] __kasan_slab_free+0x10a/0x190 [ 30.485666] kmem_cache_free+0x10d/0x4d0 [ 30.486180] rcu_core+0x8c8/0x2860 [ 30.486625] __do_softirq+0x1b7/0x7d4 [ 30.487109] [ 30.487328] Last potentially related work creation: [ 30.487916] kasan_save_stack+0x22/0x50 [ 30.488416] __kasan_record_aux_stack+0x8e/0xa0 [ 30.488996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.489713] remove_vma+0x139/0x170 [ 30.490171] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.490746] do_vmi_munmap+0x1f1/0x2b0 [ 30.491258] __vm_munmap+0x138/0x3a0 [ 30.491730] __x64_sys_munmap+0x59/0x80 [ 30.492227] do_syscall_64+0x3f/0x90 [ 30.492707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.493353] [ 30.493571] The buggy address belongs to the object at ffff888016ae89f8 [ 30.493571] which belongs to the cache vm_area_struct of size 168 [ 30.495046] The buggy address is located 88 bytes inside of [ 30.495046] freed 168-byte region [ffff888016ae89f8, ffff888016ae8aa0) [ 30.496456] [ 30.496673] The buggy address belongs to the physical page: [ 30.497338] page:00000000eb325d18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ae8 [ 30.498431] memcg:ffff88800ebecb01 [ 30.498867] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.499510] page_type: 0xffffffff() [ 30.499963] raw: 0100000000000200 ffff8880087a0c80 ffffea0000662f40 dead000000000008 [ 30.500871] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebecb01 [ 30.501776] page dumped because: kasan: bad access detected [ 30.502444] [ 30.502658] Memory state around the buggy address: [ 30.503251] ffff888016ae8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.504155] ffff888016ae8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.505112] >ffff888016ae8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.506068] ^ [ 30.506865] ffff888016ae8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.507821] ffff888016ae8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.508773] ================================================================== [ 30.509882] Disabling lock debugging due to kernel taint [ 32.523351] BUG: Bad rss-counter state mm:0000000027d4ca7b type:MM_FILEPAGES val:33 [ 32.524344] BUG: Bad rss-counter state mm:0000000027d4ca7b type:MM_ANONPAGES val:22 [ 32.997183] BUG: Bad rss-counter state mm:000000003c3a7e10 type:MM_FILEPAGES val:33 [ 32.998218] BUG: Bad rss-counter state mm:000000003c3a7e10 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43792' (ECDSA) to the list of known hosts. 2023/06/20 20:43:51 fuzzer started 2023/06/20 20:43:51 dialing manager at localhost:36067 2023/06/20 20:43:51 checking machine... 2023/06/20 20:43:51 checking revisions... [ 33.753086] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:43:51 testing simple program... [ 33.814381] cgroup: Unknown subsys name 'net' [ 33.900033] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:43:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880191c0588 RCX=0000000000000100 RDX=ffff888014631b40 RSI=ffffffff81a453ad RDI=ffff8880087c9280 RBP=ffff8880191c0588 RSP=ffff88806ce09e40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b5d66 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff8880191c0770 RIP=ffffffff81a453b4 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe0dee5d900 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=00007fe0de2ae230 CR3=000000000e434000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c9180a367a23934c00000000000ae988 XMM05=e253928a92d7fd550000000000132ad8 XMM06=806171799158d96700000000001318c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffcff681e98 CR3=0000000016e32000 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=2030353a33343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000