syzkaller login: [ 31.308287] BUG: Bad rss-counter state mm:0000000028c7393e type:MM_FILEPAGES val:33 [ 31.309285] BUG: Bad rss-counter state mm:0000000028c7393e type:MM_ANONPAGES val:22 [ 31.474230] ================================================================== [ 31.475500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.476728] Read of size 8 at addr ffff88801b049c20 by task sshd/220 [ 31.477761] [ 31.478050] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.479190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.480479] Call Trace: [ 31.480898] [ 31.481265] dump_stack_lvl+0x91/0xf0 [ 31.481922] print_report+0xcc/0x620 [ 31.482559] ? __virt_addr_valid+0x102/0x340 [ 31.483284] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484095] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484912] kasan_report+0xbe/0xf0 [ 31.485563] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.486384] vma_interval_tree_remove+0xc75/0xec0 [ 31.487173] vma_prepare+0xc54/0x11a0 [ 31.487801] __split_vma+0x5af/0x950 [ 31.488420] ? __pfx___split_vma+0x10/0x10 [ 31.489118] ? find_held_lock+0x2c/0x110 [ 31.489822] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.490561] ? lock_is_held_type+0x9f/0x120 [ 31.491284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.492087] ? mtree_range_walk+0x632/0x900 [ 31.492815] ? mas_walk+0x5c7/0x7c0 [ 31.493455] do_vmi_munmap+0x1f1/0x2b0 [ 31.494108] mmap_region+0x1f9/0x2660 [ 31.494748] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.495429] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.496374] ? __pfx_lock_acquire+0x10/0x10 [ 31.497075] ? __pfx_mmap_region+0x10/0x10 [ 31.497803] ? security_mmap_addr+0x7d/0xa0 [ 31.498500] ? get_unmapped_area+0x1f5/0x3f0 [ 31.499223] do_mmap+0x854/0xf00 [ 31.499806] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.500464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.501210] ksys_mmap_pgoff+0x3af/0x500 [ 31.501792] do_syscall_64+0x3f/0x90 [ 31.502278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.502930] RIP: 0033:0x7fedec6dbd82 [ 31.503392] 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 [ 31.505523] RSP: 002b:00007ffc63e90428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.506426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fedec6dbd82 [ 31.507269] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fedebb15000 [ 31.508119] RBP: 00007fedebb15000 R08: 0000000000000009 R09: 0000000000001000 [ 31.508956] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d433e98ec0 [ 31.509841] R13: 00007ffc63e90440 R14: 00007ffc63e90470 R15: 00007ffc63e907d0 [ 31.510707] [ 31.511008] [ 31.511228] Allocated by task 213: [ 31.511670] kasan_save_stack+0x22/0x50 [ 31.512195] kasan_set_track+0x25/0x30 [ 31.512708] __kasan_slab_alloc+0x59/0x70 [ 31.513250] kmem_cache_alloc+0x16b/0x370 [ 31.513793] vm_area_dup+0x20/0x160 [ 31.514262] __split_vma+0x170/0x950 [ 31.514747] split_vma+0xc6/0x110 [ 31.515197] mprotect_fixup+0x8d2/0xb30 [ 31.515717] do_mprotect_pkey+0x87e/0xd40 [ 31.516261] __x64_sys_mprotect+0x78/0xc0 [ 31.516797] do_syscall_64+0x3f/0x90 [ 31.517284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.517968] [ 31.518193] Freed by task 203: [ 31.518594] kasan_save_stack+0x22/0x50 [ 31.519113] kasan_set_track+0x25/0x30 [ 31.519619] kasan_save_free_info+0x2b/0x50 [ 31.520177] __kasan_slab_free+0x10a/0x190 [ 31.520726] kmem_cache_free+0x10d/0x4d0 [ 31.521253] rcu_core+0x8c8/0x2860 [ 31.521734] __do_softirq+0x1b7/0x7d4 [ 31.522224] [ 31.522444] Last potentially related work creation: [ 31.523051] kasan_save_stack+0x22/0x50 [ 31.523569] __kasan_record_aux_stack+0x8e/0xa0 [ 31.524161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.524823] remove_vma+0x139/0x170 [ 31.525289] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.525882] do_vmi_munmap+0x1f1/0x2b0 [ 31.526385] __vm_munmap+0x138/0x3a0 [ 31.526870] __x64_sys_munmap+0x59/0x80 [ 31.527380] do_syscall_64+0x3f/0x90 [ 31.527866] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.528529] [ 31.528748] The buggy address belongs to the object at ffff88801b049bc8 [ 31.528748] which belongs to the cache vm_area_struct of size 168 [ 31.530273] The buggy address is located 88 bytes inside of [ 31.530273] freed 168-byte region [ffff88801b049bc8, ffff88801b049c70) [ 31.531723] [ 31.531944] The buggy address belongs to the physical page: [ 31.532621] page:000000000656a819 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b049 [ 31.533766] memcg:ffff8880147a0b01 [ 31.534205] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.534875] page_type: 0xffffffff() [ 31.535339] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.536290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147a0b01 [ 31.537230] page dumped because: kasan: bad access detected [ 31.537925] [ 31.538155] Memory state around the buggy address: [ 31.538759] ffff88801b049b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.539646] ffff88801b049b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.540530] >ffff88801b049c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.541422] ^ [ 31.541973] ffff88801b049c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.542859] ffff88801b049d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.543737] ================================================================== [ 31.544887] Disabling lock debugging due to kernel taint [ 33.853719] BUG: Bad rss-counter state mm:00000000e69af4f1 type:MM_FILEPAGES val:33 [ 33.855133] BUG: Bad rss-counter state mm:00000000e69af4f1 type:MM_ANONPAGES val:22 [ 34.397658] BUG: Bad rss-counter state mm:000000008d4c7301 type:MM_FILEPAGES val:33 [ 34.398854] BUG: Bad rss-counter state mm:000000008d4c7301 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14079' (ECDSA) to the list of known hosts. 2023/06/21 00:21:10 fuzzer started 2023/06/21 00:21:10 dialing manager at localhost:36067 2023/06/21 00:21:10 checking machine... 2023/06/21 00:21:10 checking revisions... [ 35.130780] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:21:10 testing simple program... [ 35.192270] cgroup: Unknown subsys name 'net' [ 35.249235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f43e4006c40 RCX=000055c0ef181ca8 RDX=0000000000000002 RSI=0000000000000002 RDI=00007f43e4006c58 RBP=00007f43e4006c58 RSP=00007f43ea090728 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000286 R12=000055c0ef18f871 R13=00007f43e4006c40 R14=000055c0ef1abec0 R15=0000000000000000 RIP=00007f43eaecd763 RFL=00000213 [----A-C] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f43ea091700 00000000 00000000 GS =0000 0000000000000000 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=00007fac17c1abb8 CR3=000000000d86c000 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=2039303a31323a3030203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a31323a3030203132 XMM08=3d656e696c646d632022656369767265 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=00007f1d54f7d618 CR3=000000000d86c000 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=31323a3030203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383737 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000