syzkaller login: [ 33.768765] BUG: Bad rss-counter state mm:00000000fa24f17c type:MM_FILEPAGES val:33 [ 33.770902] BUG: Bad rss-counter state mm:00000000fa24f17c type:MM_ANONPAGES val:22 [ 33.950562] ================================================================== [ 33.951482] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.952561] Read of size 8 at addr ffff88800dc5e3f8 by task sshd/222 [ 33.953441] [ 33.953672] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.954551] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.955540] Call Trace: [ 33.955876] [ 33.956161] dump_stack_lvl+0x91/0xf0 [ 33.956656] print_report+0xcc/0x620 [ 33.957154] ? __virt_addr_valid+0x102/0x340 [ 33.957717] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.958347] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.958976] kasan_report+0xbe/0xf0 [ 33.959469] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.960101] vma_interval_tree_remove+0xc75/0xec0 [ 33.960721] vma_prepare+0xc54/0x11a0 [ 33.961214] __split_vma+0x5af/0x950 [ 33.961687] ? __pfx___split_vma+0x10/0x10 [ 33.962239] ? find_held_lock+0x2c/0x110 [ 33.962769] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.963346] ? lock_is_held_type+0x9f/0x120 [ 33.963886] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.964499] ? mtree_range_walk+0x632/0x900 [ 33.965050] ? mas_walk+0x5c7/0x7c0 [ 33.965545] do_vmi_munmap+0x1f1/0x2b0 [ 33.966045] mmap_region+0x1f9/0x2660 [ 33.966531] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.967054] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.967768] ? __pfx_lock_acquire+0x10/0x10 [ 33.968311] ? __pfx_mmap_region+0x10/0x10 [ 33.968848] ? security_mmap_addr+0x7d/0xa0 [ 33.969389] ? get_unmapped_area+0x1f5/0x3f0 [ 33.969943] do_mmap+0x854/0xf00 [ 33.970382] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.970883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.971449] ksys_mmap_pgoff+0x3af/0x500 [ 33.971960] do_syscall_64+0x3f/0x90 [ 33.972444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.973098] RIP: 0033:0x7f21affc2d82 [ 33.973585] 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 [ 33.975715] RSP: 002b:00007fff461e2338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.976623] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f21affc2d82 [ 33.977480] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f21af3fc000 [ 33.978355] RBP: 00007f21af3fc000 R08: 0000000000000009 R09: 0000000000001000 [ 33.979223] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9c5ba5d90 [ 33.980083] R13: 00007fff461e2350 R14: 00007fff461e2380 R15: 00007fff461e26e0 [ 33.980941] [ 33.981243] [ 33.981460] Allocated by task 215: [ 33.981892] kasan_save_stack+0x22/0x50 [ 33.982400] kasan_set_track+0x25/0x30 [ 33.982900] __kasan_slab_alloc+0x59/0x70 [ 33.983436] kmem_cache_alloc+0x16b/0x370 [ 33.983968] vm_area_dup+0x20/0x160 [ 33.984432] __split_vma+0x170/0x950 [ 33.984910] split_vma+0xc6/0x110 [ 33.985371] mprotect_fixup+0x8d2/0xb30 [ 33.985881] do_mprotect_pkey+0x87e/0xd40 [ 33.986407] __x64_sys_mprotect+0x78/0xc0 [ 33.986927] do_syscall_64+0x3f/0x90 [ 33.987405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.988048] [ 33.988268] Freed by task 215: [ 33.988663] kasan_save_stack+0x22/0x50 [ 33.989185] kasan_set_track+0x25/0x30 [ 33.989688] kasan_save_free_info+0x2b/0x50 [ 33.990229] __kasan_slab_free+0x10a/0x190 [ 33.990761] kmem_cache_free+0x10d/0x4d0 [ 33.991281] rcu_core+0x8c8/0x2860 [ 33.991733] __do_softirq+0x1b7/0x7d4 [ 33.992227] [ 33.992445] Last potentially related work creation: [ 33.993035] kasan_save_stack+0x22/0x50 [ 33.993554] __kasan_record_aux_stack+0x8e/0xa0 [ 33.994206] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.994865] remove_vma+0x139/0x170 [ 33.995318] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.995888] do_vmi_munmap+0x1f1/0x2b0 [ 33.996385] __vm_munmap+0x138/0x3a0 [ 33.996868] __x64_sys_munmap+0x59/0x80 [ 33.997381] do_syscall_64+0x3f/0x90 [ 33.997857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.998509] [ 33.998723] The buggy address belongs to the object at ffff88800dc5e3a0 [ 33.998723] which belongs to the cache vm_area_struct of size 168 [ 34.000239] The buggy address is located 88 bytes inside of [ 34.000239] freed 168-byte region [ffff88800dc5e3a0, ffff88800dc5e448) [ 34.001655] [ 34.001877] The buggy address belongs to the physical page: [ 34.002539] page:000000007e29ba79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc5e [ 34.003642] memcg:ffff88801476d401 [ 34.004064] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.004711] page_type: 0xffffffff() [ 34.005177] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.006100] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801476d401 [ 34.007023] page dumped because: kasan: bad access detected [ 34.007703] [ 34.007925] Memory state around the buggy address: [ 34.008534] ffff88800dc5e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 34.009406] ffff88800dc5e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 34.010272] >ffff88800dc5e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.011127] ^ [ 34.011984] ffff88800dc5e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.012849] ffff88800dc5e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.013740] ================================================================== [ 34.014691] Disabling lock debugging due to kernel taint [ 36.032621] BUG: Bad rss-counter state mm:000000009f18075f type:MM_FILEPAGES val:33 [ 36.033790] BUG: Bad rss-counter state mm:000000009f18075f type:MM_ANONPAGES val:22 [ 36.582487] BUG: Bad rss-counter state mm:0000000027304c91 type:MM_FILEPAGES val:33 [ 36.583642] BUG: Bad rss-counter state mm:0000000027304c91 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49486' (ECDSA) to the list of known hosts. 2023/06/19 14:03:14 fuzzer started 2023/06/19 14:03:14 dialing manager at localhost:44161 2023/06/19 14:03:14 checking machine... 2023/06/19 14:03:14 checking revisions... [ 37.230046] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:03:14 testing simple program... [ 37.274937] cgroup: Unknown subsys name 'net' [ 37.313520] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:03:11 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861cb336 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800fd0f9f8 RSP=ffff88800fd0f930 R8 =ffffffff861cb33a R9 =ffff88800fd0f9e0 R10=0000000000038001 R11=00000000000397e7 R12=ffff88800fd0fa00 R13=ffff88800fd0f9e8 R14=ffff88800fd0fce0 R15=ffff88800fd0f9a0 RIP=ffffffff81130bc1 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 00007f1890836900 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=00007ffeee73e000 CR3=000000001a630000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=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=00007fd4319f45f0 CR3=000000000da00000 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=2033313a33303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a33303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000