syzkaller login: [ 31.895105] BUG: Bad rss-counter state mm:00000000475a8962 type:MM_FILEPAGES val:33 [ 31.896308] BUG: Bad rss-counter state mm:00000000475a8962 type:MM_ANONPAGES val:22 [ 31.933540] ================================================================== [ 31.934558] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.935543] Read of size 8 at addr ffff88800df543f8 by task sshd/221 [ 31.936308] [ 31.936526] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.937399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.938367] Call Trace: [ 31.938685] [ 31.938971] dump_stack_lvl+0x91/0xf0 [ 31.939461] print_report+0xcc/0x620 [ 31.939947] ? __virt_addr_valid+0x102/0x340 [ 31.940497] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.941146] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.941759] kasan_report+0xbe/0xf0 [ 31.942233] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.942852] vma_interval_tree_remove+0xc75/0xec0 [ 31.943458] vma_prepare+0xc54/0x11a0 [ 31.943936] __split_vma+0x5af/0x950 [ 31.944408] ? __pfx___split_vma+0x10/0x10 [ 31.944966] ? find_held_lock+0x2c/0x110 [ 31.945492] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.946057] ? lock_is_held_type+0x9f/0x120 [ 31.946598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.947200] ? mtree_range_walk+0x632/0x900 [ 31.947751] ? mas_walk+0x5c7/0x7c0 [ 31.948223] do_vmi_munmap+0x1f1/0x2b0 [ 31.948718] mmap_region+0x1f9/0x2660 [ 31.949214] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.949745] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.950463] ? __pfx_lock_acquire+0x10/0x10 [ 31.951002] ? __pfx_mmap_region+0x10/0x10 [ 31.951544] ? security_mmap_addr+0x7d/0xa0 [ 31.952089] ? get_unmapped_area+0x1f5/0x3f0 [ 31.952646] do_mmap+0x854/0xf00 [ 31.953110] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.953617] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.954189] ksys_mmap_pgoff+0x3af/0x500 [ 31.954710] do_syscall_64+0x3f/0x90 [ 31.955195] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.955849] RIP: 0033:0x7f5297c60d82 [ 31.956308] 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 [ 31.958463] RSP: 002b:00007ffc63e54258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.959366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5297c60d82 [ 31.960209] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f529709a000 [ 31.961209] RBP: 00007f529709a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.962108] R10: 0000000000000812 R11: 0000000000000206 R12: 000055719db48d90 [ 31.962957] R13: 00007ffc63e54270 R14: 00007ffc63e542a0 R15: 00007ffc63e54600 [ 31.963833] [ 31.964126] [ 31.964338] Allocated by task 214: [ 31.964763] kasan_save_stack+0x22/0x50 [ 31.965284] kasan_set_track+0x25/0x30 [ 31.965779] __kasan_slab_alloc+0x59/0x70 [ 31.966302] kmem_cache_alloc+0x16b/0x370 [ 31.966818] vm_area_dup+0x20/0x160 [ 31.967275] __split_vma+0x170/0x950 [ 31.967742] split_vma+0xc6/0x110 [ 31.968178] mprotect_fixup+0x8d2/0xb30 [ 31.968688] do_mprotect_pkey+0x87e/0xd40 [ 31.969217] __x64_sys_mprotect+0x78/0xc0 [ 31.969738] do_syscall_64+0x3f/0x90 [ 31.970207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.970846] [ 31.971062] Freed by task 214: [ 31.971455] kasan_save_stack+0x22/0x50 [ 31.971956] kasan_set_track+0x25/0x30 [ 31.972454] kasan_save_free_info+0x2b/0x50 [ 31.973000] __kasan_slab_free+0x10a/0x190 [ 31.973533] kmem_cache_free+0x10d/0x4d0 [ 31.974045] rcu_core+0x8c8/0x2860 [ 31.974493] __do_softirq+0x1b7/0x7d4 [ 31.974963] [ 31.975182] Last potentially related work creation: [ 31.975770] kasan_save_stack+0x22/0x50 [ 31.976272] __kasan_record_aux_stack+0x8e/0xa0 [ 31.976855] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.977501] remove_vma+0x139/0x170 [ 31.977953] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.978513] do_vmi_munmap+0x1f1/0x2b0 [ 31.979012] __vm_munmap+0x138/0x3a0 [ 31.979479] __x64_sys_munmap+0x59/0x80 [ 31.979981] do_syscall_64+0x3f/0x90 [ 31.980467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.981120] [ 31.981336] The buggy address belongs to the object at ffff88800df543a0 [ 31.981336] which belongs to the cache vm_area_struct of size 168 [ 31.982804] The buggy address is located 88 bytes inside of [ 31.982804] freed 168-byte region [ffff88800df543a0, ffff88800df54448) [ 31.984216] [ 31.984436] The buggy address belongs to the physical page: [ 31.985113] page:000000002e4477cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf54 [ 31.986196] memcg:ffff88800e52be01 [ 31.986628] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.987269] page_type: 0xffffffff() [ 31.987716] raw: 0100000000000200 ffff88800879fc80 ffffea000036b040 dead000000000006 [ 31.988638] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52be01 [ 31.989550] page dumped because: kasan: bad access detected [ 31.990216] [ 31.990432] Memory state around the buggy address: [ 31.991015] ffff88800df54280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.991867] ffff88800df54300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.992718] >ffff88800df54380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.993591] ^ [ 31.994436] ffff88800df54400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.995296] ffff88800df54480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.996144] ================================================================== [ 31.997421] Disabling lock debugging due to kernel taint [ 34.054846] BUG: Bad rss-counter state mm:0000000095a8eeb8 type:MM_FILEPAGES val:33 [ 34.056081] BUG: Bad rss-counter state mm:0000000095a8eeb8 type:MM_ANONPAGES val:22 [ 34.492285] BUG: Bad rss-counter state mm:0000000090ce1b38 type:MM_FILEPAGES val:33 [ 34.493495] BUG: Bad rss-counter state mm:0000000090ce1b38 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18354' (ECDSA) to the list of known hosts. 2023/06/19 19:03:13 fuzzer started 2023/06/19 19:03:14 dialing manager at localhost:44161 2023/06/19 19:03:14 checking machine... 2023/06/19 19:03:14 checking revisions... [ 35.222425] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:03:14 testing simple program... [ 35.275899] cgroup: Unknown subsys name 'net' [ 35.314844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:03:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000508 RCX=0000000000000000 RDX=1ffff11001d0a06f RSI=ffffffff8162f874 RDI=ffff88800e850378 RBP=0000000000000508 RSP=ffff88800e78fb48 R8 =0000000000000006 R9 =0000000000000508 R10=0000000000000508 R11=2f6e6962732f7273 R12=ffffea0000581800 R13=ffff88800e78fc00 R14=ffff88800e78fe00 R15=dffffc0000000000 RIP=ffffffff8162f895 RFL=00000216 [----AP-] 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 00007fb3f78db900 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=00007fb3f7e930b0 CR3=000000001ccfc000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=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=00007f20826d33b0 CR3=000000000f2b2000 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=dcc94404e9d9d9959a40affefd9f996b XMM02=000000000011e0a8eff9b2d0a8fce9cb XMM03=000000000011e1782c67c8bc2e329bc3 XMM04=eac45905108fe56700000000000ae988 XMM05=e4cb8bb95a7664b60000000000135360 XMM06=40cc17297b1441a800000000001341c8 XMM07=e042d86d42eb936e0000000000125a30 XMM08=47c4d519a5605cad000000000011e178 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000