syzkaller login: [ 35.397822] BUG: Bad rss-counter state mm:0000000058596508 type:MM_FILEPAGES val:33 [ 35.400043] BUG: Bad rss-counter state mm:0000000058596508 type:MM_ANONPAGES val:22 [ 35.573339] ================================================================== [ 35.574492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.575789] Read of size 8 at addr ffff88801a1f0058 by task sshd/220 [ 35.576785] [ 35.577060] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.578013] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.579003] Call Trace: [ 35.579326] [ 35.579642] dump_stack_lvl+0x91/0xf0 [ 35.580135] print_report+0xcc/0x620 [ 35.580631] ? __virt_addr_valid+0x102/0x340 [ 35.581188] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.581806] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.582425] kasan_report+0xbe/0xf0 [ 35.582902] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.583534] vma_interval_tree_remove+0xc75/0xec0 [ 35.584155] vma_prepare+0xc54/0x11a0 [ 35.584639] __split_vma+0x5af/0x950 [ 35.585115] ? __pfx___split_vma+0x10/0x10 [ 35.585642] ? find_held_lock+0x2c/0x110 [ 35.586169] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.586745] ? lock_is_held_type+0x9f/0x120 [ 35.587286] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.587908] ? mtree_range_walk+0x632/0x900 [ 35.588460] ? mas_walk+0x5c7/0x7c0 [ 35.588938] do_vmi_munmap+0x1f1/0x2b0 [ 35.589436] mmap_region+0x1f9/0x2660 [ 35.589922] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.590438] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.591157] ? __pfx_lock_acquire+0x10/0x10 [ 35.591730] ? __pfx_mmap_region+0x10/0x10 [ 35.592264] ? security_mmap_addr+0x7d/0xa0 [ 35.592795] ? get_unmapped_area+0x1f5/0x3f0 [ 35.593345] do_mmap+0x854/0xf00 [ 35.593782] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.594277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.594837] ksys_mmap_pgoff+0x3af/0x500 [ 35.595343] do_syscall_64+0x3f/0x90 [ 35.595834] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.596477] RIP: 0033:0x7fe17ce6dd82 [ 35.596934] 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 [ 35.599071] RSP: 002b:00007ffd25855e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.599983] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe17ce6dd82 [ 35.600818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe17c2a7000 [ 35.601666] RBP: 00007fe17c2a7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.602514] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564f5edfdd90 [ 35.603359] R13: 00007ffd25855e80 R14: 00007ffd25855eb0 R15: 00007ffd25856210 [ 35.604233] [ 35.604526] [ 35.604742] Allocated by task 213: [ 35.605172] kasan_save_stack+0x22/0x50 [ 35.605671] kasan_set_track+0x25/0x30 [ 35.606210] __kasan_slab_alloc+0x59/0x70 [ 35.606804] kmem_cache_alloc+0x16b/0x370 [ 35.607384] vm_area_dup+0x20/0x160 [ 35.607905] __split_vma+0x170/0x950 [ 35.608435] split_vma+0xc6/0x110 [ 35.608934] mprotect_fixup+0x8d2/0xb30 [ 35.609505] do_mprotect_pkey+0x87e/0xd40 [ 35.610092] __x64_sys_mprotect+0x78/0xc0 [ 35.610683] do_syscall_64+0x3f/0x90 [ 35.611244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.611997] [ 35.612248] Freed by task 213: [ 35.612702] kasan_save_stack+0x22/0x50 [ 35.613285] kasan_set_track+0x25/0x30 [ 35.613849] kasan_save_free_info+0x2b/0x50 [ 35.614456] __kasan_slab_free+0x10a/0x190 [ 35.615066] kmem_cache_free+0x10d/0x4d0 [ 35.615673] rcu_core+0x8c8/0x2860 [ 35.616187] __do_softirq+0x1b7/0x7d4 [ 35.616733] [ 35.616984] Last potentially related work creation: [ 35.617657] kasan_save_stack+0x22/0x50 [ 35.618232] __kasan_record_aux_stack+0x8e/0xa0 [ 35.618883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.619621] remove_vma+0x139/0x170 [ 35.620147] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.620801] do_vmi_munmap+0x1f1/0x2b0 [ 35.621369] __vm_munmap+0x138/0x3a0 [ 35.621912] __x64_sys_munmap+0x59/0x80 [ 35.622501] do_syscall_64+0x3f/0x90 [ 35.623046] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.623819] [ 35.624068] The buggy address belongs to the object at ffff88801a1f0000 [ 35.624068] which belongs to the cache vm_area_struct of size 168 [ 35.625801] The buggy address is located 88 bytes inside of [ 35.625801] freed 168-byte region [ffff88801a1f0000, ffff88801a1f00a8) [ 35.627457] [ 35.627726] The buggy address belongs to the physical page: [ 35.628519] page:00000000bf1947c5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1f0 [ 35.629908] memcg:ffff88800f319201 [ 35.630451] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.631193] page_type: 0xffffffff() [ 35.631729] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.632807] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f319201 [ 35.633866] page dumped because: kasan: bad access detected [ 35.634644] [ 35.634896] Memory state around the buggy address: [ 35.635591] ffff88801a1eff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 35.636562] ffff88801a1eff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 35.637522] >ffff88801a1f0000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.638483] ^ [ 35.639333] ffff88801a1f0080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.640315] ffff88801a1f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.641269] ================================================================== [ 35.642377] Disabling lock debugging due to kernel taint [ 37.542489] BUG: Bad rss-counter state mm:00000000db030a9f type:MM_FILEPAGES val:33 [ 37.543855] BUG: Bad rss-counter state mm:00000000db030a9f type:MM_ANONPAGES val:22 [ 37.966917] BUG: Bad rss-counter state mm:0000000082dd3e2f type:MM_FILEPAGES val:33 [ 37.967940] BUG: Bad rss-counter state mm:0000000082dd3e2f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32297' (ECDSA) to the list of known hosts. 2023/06/20 00:50:55 fuzzer started 2023/06/20 00:50:55 dialing manager at localhost:44161 2023/06/20 00:50:55 checking machine... 2023/06/20 00:50:55 checking revisions... [ 38.706668] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:50:55 testing simple program... [ 38.756197] cgroup: Unknown subsys name 'net' [ 38.802522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:50:50 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=ffff88800ebf1410 RCX=ffffffff81370c98 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88806ce3a2c0 RBP=0000000000000200 RSP=ffff8880165dfa50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88806ce35000 R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff81370d0a RFL=00000086 [--S--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 00007f21de687900 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=00007ffe71564000 CR3=0000000015952000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007fc7c0d683a0 CR3=000000000d5a4000 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=2034353a30353a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a30353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000