syzkaller login: [ 89.748773] BUG: Bad rss-counter state mm:000000001a541823 type:MM_FILEPAGES val:33 [ 89.750137] BUG: Bad rss-counter state mm:000000001a541823 type:MM_ANONPAGES val:22 [ 89.903319] ================================================================== [ 89.904227] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 89.905160] Read of size 8 at addr ffff88800fdef310 by task sshd/224 [ 89.905924] [ 89.906144] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 89.907138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 89.908101] Call Trace: [ 89.908427] [ 89.908714] dump_stack_lvl+0x91/0xf0 [ 89.909203] print_report+0xcc/0x620 [ 89.909683] ? __virt_addr_valid+0x102/0x340 [ 89.910262] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.910892] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.911509] kasan_report+0xbe/0xf0 [ 89.911985] ? vma_interval_tree_remove+0xc75/0xec0 [ 89.912610] vma_interval_tree_remove+0xc75/0xec0 [ 89.913219] vma_prepare+0xc54/0x11a0 [ 89.913707] __split_vma+0x5af/0x950 [ 89.914197] ? __pfx___split_vma+0x10/0x10 [ 89.914728] ? find_held_lock+0x2c/0x110 [ 89.915249] do_vmi_align_munmap+0x2ba/0x11f0 [ 89.915811] ? lock_is_held_type+0x9f/0x120 [ 89.916348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 89.916952] ? mtree_range_walk+0x632/0x900 [ 89.917510] ? mas_walk+0x5c7/0x7c0 [ 89.917993] do_vmi_munmap+0x1f1/0x2b0 [ 89.918501] mmap_region+0x1f9/0x2660 [ 89.918988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 89.919503] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 89.920228] ? __pfx_lock_acquire+0x10/0x10 [ 89.920768] ? __pfx_mmap_region+0x10/0x10 [ 89.921296] ? security_mmap_addr+0x7d/0xa0 [ 89.921833] ? get_unmapped_area+0x1f5/0x3f0 [ 89.922400] do_mmap+0x854/0xf00 [ 89.922852] vm_mmap_pgoff+0x1a6/0x3a0 [ 89.923350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 89.923912] ksys_mmap_pgoff+0x3af/0x500 [ 89.924420] do_syscall_64+0x3f/0x90 [ 89.924906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.925561] RIP: 0033:0x7f7dde6f6d82 [ 89.926019] 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 [ 89.928152] RSP: 002b:00007ffc2b4fd458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 89.929058] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7dde6f6d82 [ 89.929905] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7dddb30000 [ 89.930769] RBP: 00007f7dddb30000 R08: 0000000000000009 R09: 0000000000001000 [ 89.931620] R10: 0000000000000812 R11: 0000000000000206 R12: 00005605b35bdec0 [ 89.932470] R13: 00007ffc2b4fd470 R14: 00007ffc2b4fd4a0 R15: 00007ffc2b4fd800 [ 89.933317] [ 89.933656] [ 89.933922] Allocated by task 217: [ 89.934452] kasan_save_stack+0x22/0x50 [ 89.935073] kasan_set_track+0x25/0x30 [ 89.935670] __kasan_slab_alloc+0x59/0x70 [ 89.936279] kmem_cache_alloc+0x16b/0x370 [ 89.936888] vm_area_dup+0x20/0x160 [ 89.937418] __split_vma+0x170/0x950 [ 89.937960] split_vma+0xc6/0x110 [ 89.938493] mprotect_fixup+0x8d2/0xb30 [ 89.939083] do_mprotect_pkey+0x87e/0xd40 [ 89.939689] __x64_sys_mprotect+0x78/0xc0 [ 89.940296] do_syscall_64+0x3f/0x90 [ 89.940861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.941616] [ 89.941866] Freed by task 217: [ 89.942339] kasan_save_stack+0x22/0x50 [ 89.942929] kasan_set_track+0x25/0x30 [ 89.943518] kasan_save_free_info+0x2b/0x50 [ 89.944133] __kasan_slab_free+0x10a/0x190 [ 89.944752] kmem_cache_free+0x10d/0x4d0 [ 89.945360] rcu_core+0x8c8/0x2860 [ 89.945879] __do_softirq+0x1b7/0x7d4 [ 89.946465] [ 89.946715] Last potentially related work creation: [ 89.947404] kasan_save_stack+0x22/0x50 [ 89.947989] __kasan_record_aux_stack+0x8e/0xa0 [ 89.948668] __call_rcu_common.constprop.0+0x6a/0xb90 [ 89.949427] remove_vma+0x139/0x170 [ 89.949956] do_vmi_align_munmap+0xd4a/0x11f0 [ 89.950615] do_vmi_munmap+0x1f1/0x2b0 [ 89.951192] __vm_munmap+0x138/0x3a0 [ 89.951743] __x64_sys_munmap+0x59/0x80 [ 89.952319] do_syscall_64+0x3f/0x90 [ 89.952880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 89.953641] [ 89.953901] The buggy address belongs to the object at ffff88800fdef2b8 [ 89.953901] which belongs to the cache vm_area_struct of size 168 [ 89.955647] The buggy address is located 88 bytes inside of [ 89.955647] freed 168-byte region [ffff88800fdef2b8, ffff88800fdef360) [ 89.957286] [ 89.957539] The buggy address belongs to the physical page: [ 89.958331] page:0000000079a83bd3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfdef [ 89.959592] memcg:ffff888019fcc301 [ 89.960090] flags: 0x100000000000200(slab|node=0|zone=1) [ 89.960845] page_type: 0xffffffff() [ 89.961378] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 89.962493] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fcc301 [ 89.963584] page dumped because: kasan: bad access detected [ 89.964352] [ 89.964606] Memory state around the buggy address: [ 89.965283] ffff88800fdef200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 89.966298] ffff88800fdef280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 89.967290] >ffff88800fdef300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 89.968281] ^ [ 89.968832] ffff88800fdef380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 89.969823] ffff88800fdef400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 89.970863] ================================================================== [ 89.972015] Disabling lock debugging due to kernel taint [ 92.260815] BUG: Bad rss-counter state mm:0000000031d91c57 type:MM_FILEPAGES val:33 [ 92.262081] BUG: Bad rss-counter state mm:0000000031d91c57 type:MM_ANONPAGES val:22 [ 92.742389] BUG: Bad rss-counter state mm:000000007c578c38 type:MM_FILEPAGES val:33 [ 92.743714] BUG: Bad rss-counter state mm:000000007c578c38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59075' (ECDSA) to the list of known hosts. 2023/06/20 13:51:12 fuzzer started 2023/06/20 13:51:13 dialing manager at localhost:36067 2023/06/20 13:51:13 checking machine... 2023/06/20 13:51:13 checking revisions... [ 93.412715] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:51:13 testing simple program... [ 93.453749] cgroup: Unknown subsys name 'net' [ 93.493260] cgroup: Unknown subsys name 'rlimit' executing program [ 96.719363] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 13:51:12 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff11002b06f43 RSP=ffff888015837a08 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6d53 R12=ffff8880100064e0 R13=ffffffff817081e6 R14=0000000000000000 R15=ffff888015837d90 RIP=ffffffff812d86f2 RFL=00000247 [---Z-PC] 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 00007f43a9f2b900 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=00007f43a9372970 CR3=000000000c6fc000 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=a62624e2101c309c00000000000ae988 XMM05=67fe8fbae44711d500000000001312d0 XMM06=993088549562ad03000000000012f5e8 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=ffff888008c04400 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=00007fae36ee1618 CR3=000000000e988000 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=2032313a31353a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a31353a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000