syzkaller login: [ 36.062629] BUG: Bad rss-counter state mm:000000004f35b82d type:MM_FILEPAGES val:33 [ 36.063850] BUG: Bad rss-counter state mm:000000004f35b82d type:MM_ANONPAGES val:22 [ 36.231353] ================================================================== [ 36.232274] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.233208] Read of size 8 at addr ffff888019f12880 by task sshd/219 [ 36.234127] [ 36.234362] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.235231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.236229] Call Trace: [ 36.236555] [ 36.236842] dump_stack_lvl+0x91/0xf0 [ 36.237340] print_report+0xcc/0x620 [ 36.237823] ? __virt_addr_valid+0x102/0x340 [ 36.238412] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.239026] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.239646] kasan_report+0xbe/0xf0 [ 36.240119] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.240739] vma_interval_tree_remove+0xc75/0xec0 [ 36.241344] vma_prepare+0xc54/0x11a0 [ 36.241831] __split_vma+0x5af/0x950 [ 36.242314] ? __pfx___split_vma+0x10/0x10 [ 36.242847] ? find_held_lock+0x2c/0x110 [ 36.243369] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.243932] ? lock_is_held_type+0x9f/0x120 [ 36.244471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.245079] ? mtree_range_walk+0x632/0x900 [ 36.245632] ? mas_walk+0x5c7/0x7c0 [ 36.246104] do_vmi_munmap+0x1f1/0x2b0 [ 36.246612] mmap_region+0x1f9/0x2660 [ 36.247098] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.247618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.248341] ? __pfx_lock_acquire+0x10/0x10 [ 36.248875] ? __pfx_mmap_region+0x10/0x10 [ 36.249412] ? security_mmap_addr+0x7d/0xa0 [ 36.249957] ? get_unmapped_area+0x1f5/0x3f0 [ 36.250526] do_mmap+0x854/0xf00 [ 36.250976] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.251476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.252044] ksys_mmap_pgoff+0x3af/0x500 [ 36.252565] do_syscall_64+0x3f/0x90 [ 36.253045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.253741] RIP: 0033:0x7f4d83c89d82 [ 36.254203] 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 [ 36.256371] RSP: 002b:00007ffd1ab23658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.257327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4d83c89d82 [ 36.258169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4d830c3000 [ 36.259053] RBP: 00007f4d830c3000 R08: 0000000000000009 R09: 0000000000001000 [ 36.259903] R10: 0000000000000812 R11: 0000000000000206 R12: 000056547338cd90 [ 36.260753] R13: 00007ffd1ab23670 R14: 00007ffd1ab236a0 R15: 00007ffd1ab23a00 [ 36.261603] [ 36.261891] [ 36.262105] Allocated by task 212: [ 36.262549] kasan_save_stack+0x22/0x50 [ 36.263055] kasan_set_track+0x25/0x30 [ 36.263551] __kasan_slab_alloc+0x59/0x70 [ 36.264072] kmem_cache_alloc+0x16b/0x370 [ 36.264590] vm_area_dup+0x20/0x160 [ 36.265044] __split_vma+0x170/0x950 [ 36.265510] split_vma+0xc6/0x110 [ 36.265947] mprotect_fixup+0x8d2/0xb30 [ 36.266469] do_mprotect_pkey+0x87e/0xd40 [ 36.266988] __x64_sys_mprotect+0x78/0xc0 [ 36.267510] do_syscall_64+0x3f/0x90 [ 36.267981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.268621] [ 36.268842] Freed by task 202: [ 36.269235] kasan_save_stack+0x22/0x50 [ 36.269736] kasan_set_track+0x25/0x30 [ 36.270231] kasan_save_free_info+0x2b/0x50 [ 36.270775] __kasan_slab_free+0x10a/0x190 [ 36.271310] kmem_cache_free+0x10d/0x4d0 [ 36.271815] rcu_core+0x8c8/0x2860 [ 36.272257] __do_softirq+0x1b7/0x7d4 [ 36.272738] [ 36.272955] Last potentially related work creation: [ 36.273540] kasan_save_stack+0x22/0x50 [ 36.274041] __kasan_record_aux_stack+0x8e/0xa0 [ 36.274630] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.275328] remove_vma+0x139/0x170 [ 36.275784] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.276350] do_vmi_munmap+0x1f1/0x2b0 [ 36.276833] __vm_munmap+0x138/0x3a0 [ 36.277298] __x64_sys_munmap+0x59/0x80 [ 36.277796] do_syscall_64+0x3f/0x90 [ 36.278274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.278919] [ 36.279146] The buggy address belongs to the object at ffff888019f12828 [ 36.279146] which belongs to the cache vm_area_struct of size 168 [ 36.280603] The buggy address is located 88 bytes inside of [ 36.280603] freed 168-byte region [ffff888019f12828, ffff888019f128d0) [ 36.281996] [ 36.282214] The buggy address belongs to the physical page: [ 36.282873] page:00000000c2252768 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f12 [ 36.283961] memcg:ffff88800eada801 [ 36.284389] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.285038] page_type: 0xffffffff() [ 36.285498] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.286445] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eada801 [ 36.287353] page dumped because: kasan: bad access detected [ 36.288011] [ 36.288230] Memory state around the buggy address: [ 36.288817] ffff888019f12780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.289687] ffff888019f12800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.290553] >ffff888019f12880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.291408] ^ [ 36.291825] ffff888019f12900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.292696] ffff888019f12980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.293571] ================================================================== [ 36.294592] Disabling lock debugging due to kernel taint [ 38.058529] BUG: Bad rss-counter state mm:000000007dcbd7dc type:MM_FILEPAGES val:33 [ 38.059281] BUG: Bad rss-counter state mm:000000007dcbd7dc type:MM_ANONPAGES val:22 [ 38.504509] BUG: Bad rss-counter state mm:00000000574c8fcf type:MM_FILEPAGES val:33 [ 38.505871] BUG: Bad rss-counter state mm:00000000574c8fcf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38845' (ECDSA) to the list of known hosts. 2023/06/19 19:40:11 fuzzer started 2023/06/19 19:40:11 dialing manager at localhost:44161 2023/06/19 19:40:11 checking machine... 2023/06/19 19:40:11 checking revisions... [ 39.226376] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:40:11 testing simple program... [ 39.280721] cgroup: Unknown subsys name 'net' [ 39.330494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:40:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000100 RDX=ffff8880142c8000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff1100d9c132e RSP=ffff88806ce09958 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800ca87d90 RIP=ffffffff8180fd20 RFL=00000256 [---ZAP-] 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 00007fc24cbe3900 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=00007fc24c103000 CR3=000000000ede4000 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=3e339c106c46c00900000000000ae988 XMM05=a2358f21ab370dca0000000000134dc0 XMM06=4fda316b135da52b0000000000133e60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8100455c RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff110011caf22 RSI=ffffffff8100455c RDI=ffff888008e57980 RBP=ffff888008e57950 RSP=ffff888008e578b0 R8 =0000000000000001 R9 =ffff888008e578f8 R10=0000000000038001 R11=0000000000009bea R12=ffff888008e57980 R13=0000000000000000 R14=ffff888008e2d1c0 R15=ffff88800f6e76c0 RIP=ffffffff813ad420 RFL=00000286 [--S--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 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=00007ffdffe37000 CR3=000000000e40a000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000