syzkaller login: [ 52.604364] BUG: Bad rss-counter state mm:00000000e04a457f type:MM_FILEPAGES val:33 [ 52.605566] BUG: Bad rss-counter state mm:00000000e04a457f type:MM_ANONPAGES val:22 [ 52.746195] ================================================================== [ 52.747118] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.748069] Read of size 8 at addr ffff88800ea22228 by task sshd/219 [ 52.748841] [ 52.749069] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.750049] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.751032] Call Trace: [ 52.751370] <TASK> [ 52.751665] dump_stack_lvl+0x91/0xf0 [ 52.752163] print_report+0xcc/0x620 [ 52.752650] ? __virt_addr_valid+0x102/0x340 [ 52.753206] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.753823] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.754435] kasan_report+0xbe/0xf0 [ 52.754910] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.755549] vma_interval_tree_remove+0xc75/0xec0 [ 52.756161] vma_prepare+0xc54/0x11a0 [ 52.756636] __split_vma+0x5af/0x950 [ 52.757107] ? __pfx___split_vma+0x10/0x10 [ 52.757633] ? find_held_lock+0x2c/0x110 [ 52.758164] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.758722] ? lock_is_held_type+0x9f/0x120 [ 52.759269] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.759880] ? mtree_range_walk+0x632/0x900 [ 52.760463] ? mas_walk+0x5c7/0x7c0 [ 52.760955] do_vmi_munmap+0x1f1/0x2b0 [ 52.761473] mmap_region+0x1f9/0x2660 [ 52.761975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.762502] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.763271] ? __pfx_lock_acquire+0x10/0x10 [ 52.763830] ? __pfx_mmap_region+0x10/0x10 [ 52.764394] ? security_mmap_addr+0x7d/0xa0 [ 52.764957] ? get_unmapped_area+0x1f5/0x3f0 [ 52.765540] do_mmap+0x854/0xf00 [ 52.766003] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.766533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.767145] ksys_mmap_pgoff+0x3af/0x500 [ 52.767680] do_syscall_64+0x3f/0x90 [ 52.768179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.768863] RIP: 0033:0x7f5322b2cd82 [ 52.769352] 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 [ 52.771634] RSP: 002b:00007ffdb6d17e48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.772598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5322b2cd82 [ 52.773495] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5321f66000 [ 52.774390] RBP: 00007f5321f66000 R08: 0000000000000009 R09: 0000000000001000 [ 52.775301] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a22473cec0 [ 52.776205] R13: 00007ffdb6d17e60 R14: 00007ffdb6d17e90 R15: 00007ffdb6d181f0 [ 52.777105] </TASK> [ 52.777414] [ 52.777632] Allocated by task 212: [ 52.778091] kasan_save_stack+0x22/0x50 [ 52.778617] kasan_set_track+0x25/0x30 [ 52.779148] __kasan_slab_alloc+0x59/0x70 [ 52.779709] kmem_cache_alloc+0x16b/0x370 [ 52.780243] vm_area_dup+0x20/0x160 [ 52.780721] __split_vma+0x170/0x950 [ 52.781215] split_vma+0xc6/0x110 [ 52.781680] mprotect_fixup+0x8d2/0xb30 [ 52.782211] do_mprotect_pkey+0x87e/0xd40 [ 52.782762] __x64_sys_mprotect+0x78/0xc0 [ 52.783319] do_syscall_64+0x3f/0x90 [ 52.783821] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.784495] [ 52.784725] Freed by task 212: [ 52.785148] kasan_save_stack+0x22/0x50 [ 52.785685] kasan_set_track+0x25/0x30 [ 52.786211] kasan_save_free_info+0x2b/0x50 [ 52.786780] __kasan_slab_free+0x10a/0x190 [ 52.787367] kmem_cache_free+0x10d/0x4d0 [ 52.787910] rcu_core+0x8c8/0x2860 [ 52.788379] __do_softirq+0x1b7/0x7d4 [ 52.788879] [ 52.789107] Last potentially related work creation: [ 52.789733] kasan_save_stack+0x22/0x50 [ 52.790264] __kasan_record_aux_stack+0x8e/0xa0 [ 52.790875] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.791552] remove_vma+0x139/0x170 [ 52.792038] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.792633] do_vmi_munmap+0x1f1/0x2b0 [ 52.793145] __vm_munmap+0x138/0x3a0 [ 52.793645] __x64_sys_munmap+0x59/0x80 [ 52.794173] do_syscall_64+0x3f/0x90 [ 52.794665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.795365] [ 52.795591] Second to last potentially related work creation: [ 52.796319] kasan_save_stack+0x22/0x50 [ 52.796846] __kasan_record_aux_stack+0x8e/0xa0 [ 52.797455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.798141] remove_vma+0x139/0x170 [ 52.798616] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.799201] do_vmi_munmap+0x1f1/0x2b0 [ 52.799715] mmap_region+0x1f9/0x2660 [ 52.800220] do_mmap+0x854/0xf00 [ 52.800676] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.801196] ksys_mmap_pgoff+0x3af/0x500 [ 52.801729] do_syscall_64+0x3f/0x90 [ 52.802232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.802904] [ 52.803145] The buggy address belongs to the object at ffff88800ea221d0 [ 52.803145] which belongs to the cache vm_area_struct of size 168 [ 52.804714] The buggy address is located 88 bytes inside of [ 52.804714] freed 168-byte region [ffff88800ea221d0, ffff88800ea22278) [ 52.806206] [ 52.806431] The buggy address belongs to the physical page: [ 52.807138] page:00000000db24a216 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea22 [ 52.808291] memcg:ffff8880099bf201 [ 52.808734] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 52.809470] page_type: 0xffffffff() [ 52.809941] raw: 0100000000000200 ffff88800879fc80 ffffea0000261280 000000000000000f [ 52.810929] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099bf201 [ 52.811903] page dumped because: kasan: bad access detected [ 52.812608] [ 52.812838] Memory state around the buggy address: [ 52.813448] ffff88800ea22100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.814363] ffff88800ea22180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 52.815267] >ffff88800ea22200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 52.816159] ^ [ 52.816747] ffff88800ea22280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 52.817634] ffff88800ea22300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 52.818530] ================================================================== [ 52.819551] Disabling lock debugging due to kernel taint [ 54.644824] BUG: Bad rss-counter state mm:00000000a7608304 type:MM_FILEPAGES val:33 [ 54.646006] BUG: Bad rss-counter state mm:00000000a7608304 type:MM_ANONPAGES val:22 [ 55.113950] BUG: Bad rss-counter state mm:000000000a2ec060 type:MM_FILEPAGES val:33 [ 55.115247] BUG: Bad rss-counter state mm:000000000a2ec060 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6011' (ECDSA) to the list of known hosts. 2023/06/20 05:52:03 fuzzer started 2023/06/20 05:52:04 dialing manager at localhost:44161 2023/06/20 05:52:04 checking machine... 2023/06/20 05:52:04 checking revisions... [ 55.755944] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:52:04 testing simple program... [ 55.808555] cgroup: Unknown subsys name 'net' [ 55.871226] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:51:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f58601a8c70 CR3=00000000165ae000 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=2033303a32353a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a32353a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018eff258 RCX=0000000000000001 RDX=1ffff110031dfe4d RSI=ffff888018eff228 RDI=ffff888018eff268 RBP=ffff888018ef8000 RSP=ffff888018eff198 R8 =0000000000000001 R9 =ffff888018eff298 R10=0000000000038001 R11=0000000000006097 R12=ffff888018eff2b8 R13=ffff888018eff2a0 R14=ffff888018eff228 R15=ffff888018eff258 RIP=ffffffff81131ca6 RFL=00000246 [---Z-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 00007fdf9333f900 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=00007ffd33cb6000 CR3=000000000fe44000 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