syzkaller login: [ 48.508792] BUG: Bad rss-counter state mm:00000000d004d121 type:MM_FILEPAGES val:33 [ 48.510715] BUG: Bad rss-counter state mm:00000000d004d121 type:MM_ANONPAGES val:22 [ 48.718362] ================================================================== [ 48.719036] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.719714] Read of size 8 at addr ffff888019c8f058 by task sshd/220 [ 48.720576] [ 48.720736] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.721367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.722061] Call Trace: [ 48.722305] [ 48.722513] dump_stack_lvl+0x91/0xf0 [ 48.722865] print_report+0xcc/0x620 [ 48.723218] ? __virt_addr_valid+0x102/0x340 [ 48.723622] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.724059] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.729456] kasan_report+0xbe/0xf0 [ 48.730382] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.731620] vma_interval_tree_remove+0xc75/0xec0 [ 48.732798] vma_prepare+0xc54/0x11a0 [ 48.733626] __split_vma+0x5af/0x950 [ 48.734503] ? __pfx___split_vma+0x10/0x10 [ 48.735464] ? find_held_lock+0x2c/0x110 [ 48.740496] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.741548] ? lock_is_held_type+0x9f/0x120 [ 48.742547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.743685] ? mtree_range_walk+0x632/0x900 [ 48.744726] ? mas_walk+0x5c7/0x7c0 [ 48.745607] do_vmi_munmap+0x1f1/0x2b0 [ 48.746569] mmap_region+0x1f9/0x2660 [ 48.747466] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.748426] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.749767] ? __pfx_lock_acquire+0x10/0x10 [ 48.750776] ? __pfx_mmap_region+0x10/0x10 [ 48.751762] ? security_mmap_addr+0x7d/0xa0 [ 48.752783] ? get_unmapped_area+0x1f5/0x3f0 [ 48.753822] do_mmap+0x854/0xf00 [ 48.754632] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.755586] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.756629] ksys_mmap_pgoff+0x3af/0x500 [ 48.757581] do_syscall_64+0x3f/0x90 [ 48.758462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.759677] RIP: 0033:0x7ffad3174d82 [ 48.760571] 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 [ 48.764904] RSP: 002b:00007ffd2e6302f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.766657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffad3174d82 [ 48.768372] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffad25ae000 [ 48.770069] RBP: 00007ffad25ae000 R08: 0000000000000009 R09: 0000000000001000 [ 48.771740] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e06fdcf70 [ 48.773414] R13: 00007ffd2e630310 R14: 00007ffd2e630340 R15: 00007ffd2e6306a0 [ 48.775075] [ 48.775615] [ 48.776004] Allocated by task 211: [ 48.776845] kasan_save_stack+0x22/0x50 [ 48.777795] kasan_set_track+0x25/0x30 [ 48.778728] __kasan_slab_alloc+0x59/0x70 [ 48.779691] kmem_cache_alloc+0x16b/0x370 [ 48.780600] vm_area_dup+0x20/0x160 [ 48.781271] __split_vma+0x170/0x950 [ 48.781959] split_vma+0xc6/0x110 [ 48.782601] mprotect_fixup+0x8d2/0xb30 [ 48.783331] do_mprotect_pkey+0x87e/0xd40 [ 48.784101] __x64_sys_mprotect+0x78/0xc0 [ 48.792586] do_syscall_64+0x3f/0x90 [ 48.793489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.794738] [ 48.795112] Freed by task 19: [ 48.795831] kasan_save_stack+0x22/0x50 [ 48.796809] kasan_set_track+0x25/0x30 [ 48.797756] kasan_save_free_info+0x2b/0x50 [ 48.798767] __kasan_slab_free+0x10a/0x190 [ 48.799773] kmem_cache_free+0x10d/0x4d0 [ 48.800756] rcu_core+0x8c8/0x2860 [ 48.801615] __do_softirq+0x1b7/0x7d4 [ 48.802544] [ 48.802918] Last potentially related work creation: [ 48.804156] kasan_save_stack+0x22/0x50 [ 48.805054] __kasan_record_aux_stack+0x8e/0xa0 [ 48.806099] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.807214] remove_vma+0x139/0x170 [ 48.808003] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.813109] do_vmi_munmap+0x1f1/0x2b0 [ 48.814076] __vm_munmap+0x138/0x3a0 [ 48.815011] __x64_sys_munmap+0x59/0x80 [ 48.816021] do_syscall_64+0x3f/0x90 [ 48.816936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.818218] [ 48.818625] Second to last potentially related work creation: [ 48.820041] kasan_save_stack+0x22/0x50 [ 48.821008] __kasan_record_aux_stack+0x8e/0xa0 [ 48.822186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.823503] remove_vma+0x139/0x170 [ 48.824348] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.825426] do_vmi_munmap+0x1f1/0x2b0 [ 48.826367] mmap_region+0x1f9/0x2660 [ 48.827339] do_mmap+0x854/0xf00 [ 48.828215] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.829149] ksys_mmap_pgoff+0x3af/0x500 [ 48.830141] do_syscall_64+0x3f/0x90 [ 48.831066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.836421] [ 48.836807] The buggy address belongs to the object at ffff888019c8f000 [ 48.836807] which belongs to the cache vm_area_struct of size 168 [ 48.839851] The buggy address is located 88 bytes inside of [ 48.839851] freed 168-byte region [ffff888019c8f000, ffff888019c8f0a8) [ 48.842754] [ 48.843163] The buggy address belongs to the physical page: [ 48.844546] page:000000002e6e13c8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c8f [ 48.846801] memcg:ffff8880187da401 [ 48.847674] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.849003] page_type: 0xffffffff() [ 48.849877] raw: 0100000000000200 ffff88800879fc80 ffffea000037fd40 dead000000000004 [ 48.851779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880187da401 [ 48.853667] page dumped because: kasan: bad access detected [ 48.855036] [ 48.855436] Memory state around the buggy address: [ 48.860357] ffff888019c8ef00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.860916] ffff888019c8ef80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 48.861484] >ffff888019c8f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.862049] ^ [ 48.862534] ffff888019c8f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 48.863102] ffff888019c8f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.863666] ================================================================== [ 48.868361] Disabling lock debugging due to kernel taint [ 52.466901] BUG: Bad rss-counter state mm:00000000eacfcb5a type:MM_FILEPAGES val:33 [ 52.467603] BUG: Bad rss-counter state mm:00000000eacfcb5a type:MM_ANONPAGES val:22 [ 53.209744] BUG: Bad rss-counter state mm:000000006c7b4c8a type:MM_FILEPAGES val:33 [ 53.211345] BUG: Bad rss-counter state mm:000000006c7b4c8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60534' (ECDSA) to the list of known hosts. 2023/06/20 08:20:30 fuzzer started 2023/06/20 08:20:30 dialing manager at localhost:44161 2023/06/20 08:20:30 checking machine... 2023/06/20 08:20:30 checking revisions... [ 54.084219] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:20:30 testing simple program... [ 54.141740] cgroup: Unknown subsys name 'net' [ 54.240859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:20:16 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800fd97768 RCX=ffff88800fd97740 RDX=1ffff11001fb2eef RSI=ffffffff813ad6d0 RDI=ffff88800fd97778 RBP=ffff88800fd97738 RSP=ffff88800fd97680 R8 =0000000000000001 R9 =ffff88800fd976e0 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fd97768 R13=0000000000000000 R14=ffff88800c741b40 R15=ffff88801c9e5850 RIP=ffffffff813ad442 RFL=00000282 [--S----] 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 00007f1b73705900 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=00007f57c8611008 CR3=00000000166e4000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f40cc91c640 CR3=000000000e8c6000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=404dcd705fb6751300000000001366c8 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=80ec66591258a1da00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000