syzkaller login: [ 31.173525] BUG: Bad rss-counter state mm:00000000878d615b type:MM_FILEPAGES val:33 [ 31.174533] BUG: Bad rss-counter state mm:00000000878d615b type:MM_ANONPAGES val:22 [ 31.333982] ================================================================== [ 31.334901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.335839] Read of size 8 at addr ffff888017e6f4e0 by task sshd/220 [ 31.336614] [ 31.336828] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.337824] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.338800] Call Trace: [ 31.339116] [ 31.339521] dump_stack_lvl+0x91/0xf0 [ 31.340122] print_report+0xcc/0x620 [ 31.340748] ? __virt_addr_valid+0x102/0x340 [ 31.341435] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342194] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.342919] kasan_report+0xbe/0xf0 [ 31.343500] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.344297] vma_interval_tree_remove+0xc75/0xec0 [ 31.345066] vma_prepare+0xc54/0x11a0 [ 31.345666] __split_vma+0x5af/0x950 [ 31.346266] ? __pfx___split_vma+0x10/0x10 [ 31.346924] ? find_held_lock+0x2c/0x110 [ 31.347583] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.348297] ? lock_is_held_type+0x9f/0x120 [ 31.348991] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.349770] ? mtree_range_walk+0x632/0x900 [ 31.350359] ? mas_walk+0x5c7/0x7c0 [ 31.350830] do_vmi_munmap+0x1f1/0x2b0 [ 31.351339] mmap_region+0x1f9/0x2660 [ 31.351824] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.352360] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.353109] ? __pfx_lock_acquire+0x10/0x10 [ 31.353656] ? __pfx_mmap_region+0x10/0x10 [ 31.354207] ? security_mmap_addr+0x7d/0xa0 [ 31.354740] ? get_unmapped_area+0x1f5/0x3f0 [ 31.355302] do_mmap+0x854/0xf00 [ 31.355741] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.356262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.356834] ksys_mmap_pgoff+0x3af/0x500 [ 31.357369] do_syscall_64+0x3f/0x90 [ 31.357848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358520] RIP: 0033:0x7fb301a66d82 [ 31.358981] 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 [ 31.361169] RSP: 002b:00007ffd942f4268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.362093] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb301a66d82 [ 31.362950] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb300ea0000 [ 31.363816] RBP: 00007fb300ea0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.364697] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555a23d10ec0 [ 31.365558] R13: 00007ffd942f4280 R14: 00007ffd942f42b0 R15: 00007ffd942f4610 [ 31.366429] [ 31.366725] [ 31.366939] Allocated by task 213: [ 31.367398] kasan_save_stack+0x22/0x50 [ 31.367899] kasan_set_track+0x25/0x30 [ 31.368407] __kasan_slab_alloc+0x59/0x70 [ 31.368953] kmem_cache_alloc+0x16b/0x370 [ 31.369480] vm_area_dup+0x20/0x160 [ 31.369933] __split_vma+0x170/0x950 [ 31.370423] split_vma+0xc6/0x110 [ 31.370867] mprotect_fixup+0x8d2/0xb30 [ 31.371378] do_mprotect_pkey+0x87e/0xd40 [ 31.371900] __x64_sys_mprotect+0x78/0xc0 [ 31.372454] do_syscall_64+0x3f/0x90 [ 31.372946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373607] [ 31.373825] Freed by task 13: [ 31.374223] kasan_save_stack+0x22/0x50 [ 31.374724] kasan_set_track+0x25/0x30 [ 31.375243] kasan_save_free_info+0x2b/0x50 [ 31.375774] __kasan_slab_free+0x10a/0x190 [ 31.376329] kmem_cache_free+0x10d/0x4d0 [ 31.376854] rcu_core+0x8c8/0x2860 [ 31.377331] __do_softirq+0x1b7/0x7d4 [ 31.377804] [ 31.378021] Last potentially related work creation: [ 31.378709] kasan_save_stack+0x22/0x50 [ 31.379276] __kasan_record_aux_stack+0x8e/0xa0 [ 31.379848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.380520] remove_vma+0x139/0x170 [ 31.380973] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.381541] do_vmi_munmap+0x1f1/0x2b0 [ 31.382029] __vm_munmap+0x138/0x3a0 [ 31.382527] __x64_sys_munmap+0x59/0x80 [ 31.383026] do_syscall_64+0x3f/0x90 [ 31.383525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384182] [ 31.384396] The buggy address belongs to the object at ffff888017e6f488 [ 31.384396] which belongs to the cache vm_area_struct of size 168 [ 31.385883] The buggy address is located 88 bytes inside of [ 31.385883] freed 168-byte region [ffff888017e6f488, ffff888017e6f530) [ 31.387337] [ 31.387553] The buggy address belongs to the physical page: [ 31.388222] page:000000009142c3af refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e6f [ 31.389343] memcg:ffff888017c69a01 [ 31.389774] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.390452] page_type: 0xffffffff() [ 31.390910] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.391849] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017c69a01 [ 31.392777] page dumped because: kasan: bad access detected [ 31.393461] [ 31.393679] Memory state around the buggy address: [ 31.394293] ffff888017e6f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.395167] ffff888017e6f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.396011] >ffff888017e6f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.396897] ^ [ 31.397670] ffff888017e6f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.398556] ffff888017e6f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.399420] ================================================================== [ 31.400440] Disabling lock debugging due to kernel taint [ 33.935169] BUG: Bad rss-counter state mm:000000002e2e867e type:MM_FILEPAGES val:33 [ 33.936392] BUG: Bad rss-counter state mm:000000002e2e867e type:MM_ANONPAGES val:22 [ 34.464933] BUG: Bad rss-counter state mm:0000000074d24c32 type:MM_FILEPAGES val:33 [ 34.466117] BUG: Bad rss-counter state mm:0000000074d24c32 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15823' (ECDSA) to the list of known hosts. 2023/06/19 22:15:08 fuzzer started 2023/06/19 22:15:08 dialing manager at localhost:44161 2023/06/19 22:15:08 checking machine... 2023/06/19 22:15:08 checking revisions... [ 35.102812] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:15:08 testing simple program... [ 35.157490] cgroup: Unknown subsys name 'net' [ 35.196275] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:15:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88800c46fbb0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b910 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 00007f796123e900 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=00007ffc1150a000 CR3=000000000f5c6000 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=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 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=00007fc114824050 CR3=000000000daf0000 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=2037303a35313a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a35313a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000