syzkaller login: [ 47.263732] BUG: Bad rss-counter state mm:000000000694120d type:MM_FILEPAGES val:33 [ 47.264690] BUG: Bad rss-counter state mm:000000000694120d type:MM_ANONPAGES val:22 [ 47.423324] ================================================================== [ 47.424235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.425115] Read of size 8 at addr ffff88800f1abdf0 by task sshd/219 [ 47.425833] [ 47.426137] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.426949] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.427885] Call Trace: [ 47.428202] [ 47.428473] dump_stack_lvl+0x91/0xf0 [ 47.428936] print_report+0xcc/0x620 [ 47.429396] ? __virt_addr_valid+0x102/0x340 [ 47.429918] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.430504] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.431087] kasan_report+0xbe/0xf0 [ 47.431548] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.432136] vma_interval_tree_remove+0xc75/0xec0 [ 47.432702] vma_prepare+0xc54/0x11a0 [ 47.433170] __split_vma+0x5af/0x950 [ 47.433635] ? __pfx___split_vma+0x10/0x10 [ 47.434173] ? find_held_lock+0x2c/0x110 [ 47.434690] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.435267] ? lock_is_held_type+0x9f/0x120 [ 47.435801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.436401] ? mtree_range_walk+0x632/0x900 [ 47.436938] ? mas_walk+0x5c7/0x7c0 [ 47.437405] do_vmi_munmap+0x1f1/0x2b0 [ 47.437886] mmap_region+0x1f9/0x2660 [ 47.438364] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.438874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.439590] ? __pfx_lock_acquire+0x10/0x10 [ 47.440122] ? __pfx_mmap_region+0x10/0x10 [ 47.440656] ? security_mmap_addr+0x7d/0xa0 [ 47.441189] ? get_unmapped_area+0x1f5/0x3f0 [ 47.441733] do_mmap+0x854/0xf00 [ 47.442166] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.442658] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.443203] ksys_mmap_pgoff+0x3af/0x500 [ 47.443713] do_syscall_64+0x3f/0x90 [ 47.444184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.444822] RIP: 0033:0x7fe6d7292d82 [ 47.445272] 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 [ 47.447363] RSP: 002b:00007ffc13ae21d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.448261] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6d7292d82 [ 47.449097] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6d66cc000 [ 47.449939] RBP: 00007fe6d66cc000 R08: 0000000000000009 R09: 0000000000001000 [ 47.450773] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620d4360f60 [ 47.451610] R13: 00007ffc13ae21f0 R14: 00007ffc13ae2220 R15: 00007ffc13ae2580 [ 47.452458] [ 47.452746] [ 47.452956] Allocated by task 212: [ 47.453377] kasan_save_stack+0x22/0x50 [ 47.453874] kasan_set_track+0x25/0x30 [ 47.454364] __kasan_slab_alloc+0x59/0x70 [ 47.454885] kmem_cache_alloc+0x16b/0x370 [ 47.455412] vm_area_dup+0x20/0x160 [ 47.455861] __split_vma+0x170/0x950 [ 47.456319] split_vma+0xc6/0x110 [ 47.456756] mprotect_fixup+0x8d2/0xb30 [ 47.457257] do_mprotect_pkey+0x87e/0xd40 [ 47.457779] __x64_sys_mprotect+0x78/0xc0 [ 47.458286] do_syscall_64+0x3f/0x90 [ 47.458760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.459406] [ 47.459622] Freed by task 203: [ 47.459999] kasan_save_stack+0x22/0x50 [ 47.460498] kasan_set_track+0x25/0x30 [ 47.460988] kasan_save_free_info+0x2b/0x50 [ 47.461509] __kasan_slab_free+0x10a/0x190 [ 47.462039] kmem_cache_free+0x10d/0x4d0 [ 47.462542] rcu_core+0x8c8/0x2860 [ 47.462981] __do_softirq+0x1b7/0x7d4 [ 47.463467] [ 47.463677] Last potentially related work creation: [ 47.464258] kasan_save_stack+0x22/0x50 [ 47.464746] __kasan_record_aux_stack+0x8e/0xa0 [ 47.465314] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.465947] remove_vma+0x139/0x170 [ 47.466390] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.466938] do_vmi_munmap+0x1f1/0x2b0 [ 47.467418] __vm_munmap+0x138/0x3a0 [ 47.467875] __x64_sys_munmap+0x59/0x80 [ 47.468361] do_syscall_64+0x3f/0x90 [ 47.468829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.469456] [ 47.469667] Second to last potentially related work creation: [ 47.470340] kasan_save_stack+0x22/0x50 [ 47.470833] __kasan_record_aux_stack+0x8e/0xa0 [ 47.471416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.472042] remove_vma+0x139/0x170 [ 47.472483] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.473026] do_vmi_munmap+0x1f1/0x2b0 [ 47.473505] mmap_region+0x1f9/0x2660 [ 47.473981] do_mmap+0x854/0xf00 [ 47.474407] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.474882] ksys_mmap_pgoff+0x3af/0x500 [ 47.475382] do_syscall_64+0x3f/0x90 [ 47.475850] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.476477] [ 47.476688] The buggy address belongs to the object at ffff88800f1abd98 [ 47.476688] which belongs to the cache vm_area_struct of size 168 [ 47.478109] The buggy address is located 88 bytes inside of [ 47.478109] freed 168-byte region [ffff88800f1abd98, ffff88800f1abe40) [ 47.479500] [ 47.479715] The buggy address belongs to the physical page: [ 47.480366] page:0000000018c61b61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1ab [ 47.481431] memcg:ffff88800f0a2d01 [ 47.481839] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.482527] page_type: 0xffffffff() [ 47.482972] raw: 0100000000000200 ffff88800879fc80 ffffea00003aeb40 dead000000000007 [ 47.483875] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0a2d01 [ 47.484750] page dumped because: kasan: bad access detected [ 47.485397] [ 47.485608] Memory state around the buggy address: [ 47.486179] ffff88800f1abc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 47.486999] ffff88800f1abd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 47.487858] >ffff88800f1abd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 47.488695] ^ [ 47.489492] ffff88800f1abe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 47.490331] ffff88800f1abe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 47.491161] ================================================================== [ 47.492525] Disabling lock debugging due to kernel taint [ 49.429735] BUG: Bad rss-counter state mm:00000000ba277071 type:MM_FILEPAGES val:33 [ 49.430729] BUG: Bad rss-counter state mm:00000000ba277071 type:MM_ANONPAGES val:22 [ 49.888685] BUG: Bad rss-counter state mm:00000000ea06748c type:MM_FILEPAGES val:33 [ 49.889694] BUG: Bad rss-counter state mm:00000000ea06748c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28771' (ECDSA) to the list of known hosts. 2023/06/19 23:59:03 fuzzer started 2023/06/19 23:59:03 dialing manager at localhost:44161 2023/06/19 23:59:03 checking machine... 2023/06/19 23:59:03 checking revisions... [ 50.586831] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:59:03 testing simple program... [ 50.635062] cgroup: Unknown subsys name 'net' [ 50.724518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:58:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f35e5d1dc64 RCX=0000000000000000 RDX=ffff888014608000 RSI=00007f35e5d1dc64 RDI=ffffffff856528e0 RBP=00007f35e5d1dc64 RSP=ffff88800cedf5e8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800cedf710 R13=0000000000000000 R14=ffff888014608000 R15=0000000000092cc0 RIP=ffffffff814c83da 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 00007f35e5464900 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=00007fe8093ca650 CR3=000000000c66c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d6b599e15f5daaba00000000000ae988 XMM05=4ad8c7f06cea75710000000000136578 XMM06=806171799158d9670000000000134ff8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffc940fbc08 CR3=00000000168f0000 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=2032303a39353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a39353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000