syzkaller login: [ 33.581460] BUG: Bad rss-counter state mm:0000000040299b27 type:MM_FILEPAGES val:33 [ 33.582961] BUG: Bad rss-counter state mm:0000000040299b27 type:MM_ANONPAGES val:22 [ 33.736145] ================================================================== [ 33.737086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.738048] Read of size 8 at addr ffff88800db83d08 by task sshd/219 [ 33.738831] [ 33.739066] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.740040] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.741035] Call Trace: [ 33.741362] [ 33.741774] dump_stack_lvl+0x91/0xf0 [ 33.742365] print_report+0xcc/0x620 [ 33.742944] ? __virt_addr_valid+0x102/0x340 [ 33.743609] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.744359] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.745102] kasan_report+0xbe/0xf0 [ 33.745687] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.746428] vma_interval_tree_remove+0xc75/0xec0 [ 33.747174] vma_prepare+0xc54/0x11a0 [ 33.747776] __split_vma+0x5af/0x950 [ 33.748353] ? __pfx___split_vma+0x10/0x10 [ 33.749004] ? find_held_lock+0x2c/0x110 [ 33.749646] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.750344] ? lock_is_held_type+0x9f/0x120 [ 33.751010] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.751794] ? mtree_range_walk+0x632/0x900 [ 33.752469] ? mas_walk+0x5c7/0x7c0 [ 33.752946] do_vmi_munmap+0x1f1/0x2b0 [ 33.753439] mmap_region+0x1f9/0x2660 [ 33.753923] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.754433] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.755141] ? __pfx_lock_acquire+0x10/0x10 [ 33.755679] ? __pfx_mmap_region+0x10/0x10 [ 33.756205] ? security_mmap_addr+0x7d/0xa0 [ 33.756733] ? get_unmapped_area+0x1f5/0x3f0 [ 33.757277] do_mmap+0x854/0xf00 [ 33.757723] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.758217] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.758784] ksys_mmap_pgoff+0x3af/0x500 [ 33.759286] do_syscall_64+0x3f/0x90 [ 33.759775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.760420] RIP: 0033:0x7f68fb5d4d82 [ 33.760878] 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 [ 33.763001] RSP: 002b:00007ffd60bd1058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.763930] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68fb5d4d82 [ 33.764781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68faa0e000 [ 33.765630] RBP: 00007f68faa0e000 R08: 0000000000000009 R09: 0000000000001000 [ 33.766478] R10: 0000000000000812 R11: 0000000000000206 R12: 00005616e2accb20 [ 33.767324] R13: 00007ffd60bd1070 R14: 00007ffd60bd10a0 R15: 00007ffd60bd1400 [ 33.768187] [ 33.768478] [ 33.768692] Allocated by task 212: [ 33.769125] kasan_save_stack+0x22/0x50 [ 33.769629] kasan_set_track+0x25/0x30 [ 33.770119] __kasan_slab_alloc+0x59/0x70 [ 33.770645] kmem_cache_alloc+0x16b/0x370 [ 33.771157] vm_area_dup+0x20/0x160 [ 33.771610] __split_vma+0x170/0x950 [ 33.772099] split_vma+0xc6/0x110 [ 33.772538] mprotect_fixup+0x8d2/0xb30 [ 33.773043] do_mprotect_pkey+0x87e/0xd40 [ 33.773560] __x64_sys_mprotect+0x78/0xc0 [ 33.774078] do_syscall_64+0x3f/0x90 [ 33.774557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.775198] [ 33.775413] Freed by task 19: [ 33.775805] kasan_save_stack+0x22/0x50 [ 33.776308] kasan_set_track+0x25/0x30 [ 33.776804] kasan_save_free_info+0x2b/0x50 [ 33.777336] __kasan_slab_free+0x10a/0x190 [ 33.777862] kmem_cache_free+0x10d/0x4d0 [ 33.778378] rcu_core+0x8c8/0x2860 [ 33.778820] __do_softirq+0x1b7/0x7d4 [ 33.779297] [ 33.779513] Last potentially related work creation: [ 33.780106] kasan_save_stack+0x22/0x50 [ 33.780611] __kasan_record_aux_stack+0x8e/0xa0 [ 33.781189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.781838] remove_vma+0x139/0x170 [ 33.782292] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.782850] do_vmi_munmap+0x1f1/0x2b0 [ 33.783338] __vm_munmap+0x138/0x3a0 [ 33.783818] __x64_sys_munmap+0x59/0x80 [ 33.784317] do_syscall_64+0x3f/0x90 [ 33.784788] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.785432] [ 33.785647] Second to last potentially related work creation: [ 33.786327] kasan_save_stack+0x22/0x50 [ 33.786832] __kasan_record_aux_stack+0x8e/0xa0 [ 33.787404] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.788098] remove_vma+0x139/0x170 [ 33.788551] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.789110] do_vmi_munmap+0x1f1/0x2b0 [ 33.789606] mmap_region+0x1f9/0x2660 [ 33.790086] do_mmap+0x854/0xf00 [ 33.790523] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.791013] ksys_mmap_pgoff+0x3af/0x500 [ 33.791522] do_syscall_64+0x3f/0x90 [ 33.792017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.792657] [ 33.792871] The buggy address belongs to the object at ffff88800db83cb0 [ 33.792871] which belongs to the cache vm_area_struct of size 168 [ 33.794347] The buggy address is located 88 bytes inside of [ 33.794347] freed 168-byte region [ffff88800db83cb0, ffff88800db83d58) [ 33.795775] [ 33.795991] The buggy address belongs to the physical page: [ 33.796658] page:00000000a405b1a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb83 [ 33.797733] memcg:ffff888009417b01 [ 33.798162] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.798868] page_type: 0xffffffff() [ 33.799320] raw: 0100000000000200 ffff88800879fc80 ffffea00003b3340 dead000000000003 [ 33.800268] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009417b01 [ 33.801168] page dumped because: kasan: bad access detected [ 33.801832] [ 33.802046] Memory state around the buggy address: [ 33.802630] ffff88800db83c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.803487] ffff88800db83c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.804387] >ffff88800db83d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.805238] ^ [ 33.805677] ffff88800db83d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 33.806530] ffff88800db83e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 33.807371] ================================================================== [ 33.808387] Disabling lock debugging due to kernel taint [ 36.042691] BUG: Bad rss-counter state mm:000000001b8b6f29 type:MM_FILEPAGES val:33 [ 36.043930] BUG: Bad rss-counter state mm:000000001b8b6f29 type:MM_ANONPAGES val:22 [ 36.432385] BUG: Bad rss-counter state mm:00000000db35b075 type:MM_FILEPAGES val:33 [ 36.433495] BUG: Bad rss-counter state mm:00000000db35b075 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26679' (ECDSA) to the list of known hosts. 2023/06/20 10:33:42 fuzzer started 2023/06/20 10:33:43 dialing manager at localhost:44161 2023/06/20 10:33:43 checking machine... 2023/06/20 10:33:43 checking revisions... [ 37.185275] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:33:43 testing simple program... [ 37.234990] cgroup: Unknown subsys name 'net' [ 37.289554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:33:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d83fcd8 RCX=0000000000000008 RDX=0000000000000001 RSI=00007ffd39056700 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800d83fb88 R8 =ffff88800d83fcd8 R9 =ffff88800d83fe70 R10=0000000000000000 R11=0000000000000000 R12=00007ffd39056700 R13=0000000000000001 R14=0000000000000008 R15=ffff88800d83fe70 RIP=ffffffff82169094 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 00007f079c752900 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=00007f832ef81650 CR3=000000000d6a0000 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=deecf988b2f20fb1664271b4d62bd4d5 XMM02=eff9b2d0a8fce9cb000000000011ca20 XMM03=2c67c8bc2e329bc3000000000011cb48 XMM04=dab83df7178965bf00000000000ae988 XMM05=3683375d1a23ecbe0000000000135f88 XMM06=806171799158d9670000000000134d78 XMM07=fb795ef6d65770560000000000123fb0 XMM08=2c67c8bc2e329bc3000000000011cb48 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=0000000000000001 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=00007ffff63ffc58 CR3=000000000ef42000 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=2032343a33333a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33333a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000