syzkaller login: [ 38.100846] BUG: Bad rss-counter state mm:000000006b83c9d5 type:MM_FILEPAGES val:33 [ 38.101848] BUG: Bad rss-counter state mm:000000006b83c9d5 type:MM_ANONPAGES val:22 [ 38.260146] ================================================================== [ 38.261208] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.262309] Read of size 8 at addr ffff88800c82f4e0 by task sshd/219 [ 38.263360] [ 38.263580] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.264441] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.265436] Call Trace: [ 38.265751] [ 38.266038] dump_stack_lvl+0x91/0xf0 [ 38.266523] print_report+0xcc/0x620 [ 38.267002] ? __virt_addr_valid+0x102/0x340 [ 38.267567] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.268182] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.268793] kasan_report+0xbe/0xf0 [ 38.269264] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.269891] vma_interval_tree_remove+0xc75/0xec0 [ 38.270495] vma_prepare+0xc54/0x11a0 [ 38.270971] __split_vma+0x5af/0x950 [ 38.271455] ? __pfx___split_vma+0x10/0x10 [ 38.271986] ? find_held_lock+0x2c/0x110 [ 38.272518] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.273082] ? lock_is_held_type+0x9f/0x120 [ 38.273621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.274227] ? mtree_range_walk+0x632/0x900 [ 38.274778] ? mas_walk+0x5c7/0x7c0 [ 38.275300] do_vmi_munmap+0x1f1/0x2b0 [ 38.275788] mmap_region+0x1f9/0x2660 [ 38.276270] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.276777] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.277494] ? __pfx_lock_acquire+0x10/0x10 [ 38.278029] ? __pfx_mmap_region+0x10/0x10 [ 38.278557] ? security_mmap_addr+0x7d/0xa0 [ 38.279083] ? get_unmapped_area+0x1f5/0x3f0 [ 38.279650] do_mmap+0x854/0xf00 [ 38.280088] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.280587] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.281157] ksys_mmap_pgoff+0x3af/0x500 [ 38.281663] do_syscall_64+0x3f/0x90 [ 38.282135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.282778] RIP: 0033:0x7f47d3b89d82 [ 38.283245] 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 [ 38.285390] RSP: 002b:00007fffae0c6a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.286304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f47d3b89d82 [ 38.287152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f47d2fc3000 [ 38.288009] RBP: 00007f47d2fc3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.288845] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ffafcfad90 [ 38.289684] R13: 00007fffae0c6a40 R14: 00007fffae0c6a70 R15: 00007fffae0c6dd0 [ 38.290525] [ 38.290813] [ 38.291031] Allocated by task 212: [ 38.291470] kasan_save_stack+0x22/0x50 [ 38.291969] kasan_set_track+0x25/0x30 [ 38.292454] __kasan_slab_alloc+0x59/0x70 [ 38.292976] kmem_cache_alloc+0x16b/0x370 [ 38.293491] vm_area_dup+0x20/0x160 [ 38.293952] __split_vma+0x170/0x950 [ 38.294414] split_vma+0xc6/0x110 [ 38.294849] mprotect_fixup+0x8d2/0xb30 [ 38.295360] do_mprotect_pkey+0x87e/0xd40 [ 38.295874] __x64_sys_mprotect+0x78/0xc0 [ 38.296387] do_syscall_64+0x3f/0x90 [ 38.296853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.297489] [ 38.297704] Freed by task 212: [ 38.298099] kasan_save_stack+0x22/0x50 [ 38.298596] kasan_set_track+0x25/0x30 [ 38.299087] kasan_save_free_info+0x2b/0x50 [ 38.299644] __kasan_slab_free+0x10a/0x190 [ 38.300172] kmem_cache_free+0x10d/0x4d0 [ 38.300674] rcu_core+0x8c8/0x2860 [ 38.301114] __do_softirq+0x1b7/0x7d4 [ 38.301594] [ 38.301807] Last potentially related work creation: [ 38.302388] kasan_save_stack+0x22/0x50 [ 38.302891] __kasan_record_aux_stack+0x8e/0xa0 [ 38.303475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.304115] remove_vma+0x139/0x170 [ 38.304647] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.305204] do_vmi_munmap+0x1f1/0x2b0 [ 38.305695] __vm_munmap+0x138/0x3a0 [ 38.306159] __x64_sys_munmap+0x59/0x80 [ 38.306655] do_syscall_64+0x3f/0x90 [ 38.307128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.307783] [ 38.307996] Second to last potentially related work creation: [ 38.308673] kasan_save_stack+0x22/0x50 [ 38.309179] __kasan_record_aux_stack+0x8e/0xa0 [ 38.309755] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.310395] remove_vma+0x139/0x170 [ 38.310846] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.311401] do_vmi_munmap+0x1f1/0x2b0 [ 38.311891] move_vma.constprop.0+0x88a/0x1ba0 [ 38.312464] __do_sys_mremap+0xb78/0x1780 [ 38.312985] do_syscall_64+0x3f/0x90 [ 38.313455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.314088] [ 38.314301] The buggy address belongs to the object at ffff88800c82f488 [ 38.314301] which belongs to the cache vm_area_struct of size 168 [ 38.315802] The buggy address is located 88 bytes inside of [ 38.315802] freed 168-byte region [ffff88800c82f488, ffff88800c82f530) [ 38.317211] [ 38.317424] The buggy address belongs to the physical page: [ 38.318090] page:00000000c63040ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc82f [ 38.319173] memcg:ffff88800eb86f01 [ 38.319616] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.320342] page_type: 0xffffffff() [ 38.320841] raw: 0100000000000200 ffff88800879fc80 ffffea00003aaf00 dead000000000007 [ 38.321752] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb86f01 [ 38.322646] page dumped because: kasan: bad access detected [ 38.323315] [ 38.323531] Memory state around the buggy address: [ 38.324103] ffff88800c82f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.324953] ffff88800c82f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.325799] >ffff88800c82f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.326639] ^ [ 38.327392] ffff88800c82f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 38.328241] ffff88800c82f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.329090] ================================================================== [ 38.330011] Disabling lock debugging due to kernel taint [ 40.371200] BUG: Bad rss-counter state mm:00000000bc9a45bf type:MM_FILEPAGES val:33 [ 40.372212] BUG: Bad rss-counter state mm:00000000bc9a45bf type:MM_ANONPAGES val:22 [ 40.873057] BUG: Bad rss-counter state mm:00000000b7697286 type:MM_FILEPAGES val:33 [ 40.874079] BUG: Bad rss-counter state mm:00000000b7697286 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5404' (ECDSA) to the list of known hosts. 2023/06/20 02:52:07 fuzzer started 2023/06/20 02:52:07 dialing manager at localhost:44161 2023/06/20 02:52:07 checking machine... 2023/06/20 02:52:07 checking revisions... [ 41.584423] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:52:07 testing simple program... [ 41.625966] cgroup: Unknown subsys name 'net' [ 41.665368] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:59 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff816ecc6a RDX=ffff888009f251c0 RSI=0000000000000000 RDI=0000000000000001 RBP=dffffc0000000000 RSP=ffff888017cffc10 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=ffff88800f776000 R13=0000000000000cc0 R14=0000000000000cc0 R15=0000000000000cc0 RIP=ffffffff814c07eb RFL=00000202 [-------] 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 00007f143cdf0900 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=00007f143d3a80b0 CR3=000000000ff78000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007ffecf950ac8 CR3=0000000018c14000 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=2037303a32353a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036303a32353a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000