[ 26.138801] BUG: Bad rss-counter state mm:0000000076f39ec7 type:MM_FILEPAGES val:33 [ 26.140243] BUG: Bad rss-counter state mm:0000000076f39ec7 type:MM_ANONPAGES val:22 [ 26.286972] ================================================================== [ 26.287888] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.288854] Read of size 8 at addr ffff88800e309228 by task sshd/218 [ 26.289619] [ 26.289932] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.290818] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.291812] Call Trace: [ 26.292160] [ 26.292444] dump_stack_lvl+0x91/0xf0 [ 26.292941] print_report+0xcc/0x620 [ 26.293430] ? __virt_addr_valid+0x102/0x340 [ 26.293987] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.294611] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.295229] kasan_report+0xbe/0xf0 [ 26.295714] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.296349] vma_interval_tree_remove+0xc75/0xec0 [ 26.296954] vma_prepare+0xc54/0x11a0 [ 26.297441] __split_vma+0x5af/0x950 [ 26.297918] ? __pfx___split_vma+0x10/0x10 [ 26.298451] ? find_held_lock+0x2c/0x110 [ 26.298986] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.299553] ? lock_is_held_type+0x9f/0x120 [ 26.300130] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.300753] ? mtree_range_walk+0x632/0x900 [ 26.301315] ? mas_walk+0x5c7/0x7c0 [ 26.301793] do_vmi_munmap+0x1f1/0x2b0 [ 26.302292] mmap_region+0x1f9/0x2660 [ 26.302776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.303290] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.304019] ? __pfx_lock_acquire+0x10/0x10 [ 26.304555] ? __pfx_mmap_region+0x10/0x10 [ 26.305094] ? security_mmap_addr+0x7d/0xa0 [ 26.305624] ? get_unmapped_area+0x1f5/0x3f0 [ 26.306173] do_mmap+0x854/0xf00 [ 26.306623] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.307124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.307694] ksys_mmap_pgoff+0x3af/0x500 [ 26.308238] do_syscall_64+0x3f/0x90 [ 26.308722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.309369] RIP: 0033:0x7ff335976d82 [ 26.309832] 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 [ 26.311964] RSP: 002b:00007ffe501b7428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.312880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff335976d82 [ 26.313729] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff334db0000 [ 26.314570] RBP: 00007ff334db0000 R08: 0000000000000009 R09: 0000000000001000 [ 26.315417] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd7ab0b980 [ 26.316277] R13: 00007ffe501b7440 R14: 00007ffe501b7470 R15: 00007ffe501b77d0 [ 26.317156] [ 26.317458] [ 26.317674] Allocated by task 211: [ 26.318097] kasan_save_stack+0x22/0x50 [ 26.318615] kasan_set_track+0x25/0x30 [ 26.319109] __kasan_slab_alloc+0x59/0x70 [ 26.319639] kmem_cache_alloc+0x16b/0x370 [ 26.320181] vm_area_dup+0x20/0x160 [ 26.320642] __split_vma+0x170/0x950 [ 26.321112] split_vma+0xc6/0x110 [ 26.321558] mprotect_fixup+0x8d2/0xb30 [ 26.322068] do_mprotect_pkey+0x87e/0xd40 [ 26.322595] __x64_sys_mprotect+0x78/0xc0 [ 26.323130] do_syscall_64+0x3f/0x90 [ 26.323618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.324284] [ 26.324499] Freed by task 211: [ 26.324901] kasan_save_stack+0x22/0x50 [ 26.325418] kasan_set_track+0x25/0x30 [ 26.325914] kasan_save_free_info+0x2b/0x50 [ 26.326455] __kasan_slab_free+0x10a/0x190 [ 26.326996] kmem_cache_free+0x10d/0x4d0 [ 26.327514] rcu_core+0x8c8/0x2860 [ 26.327973] __do_softirq+0x1b7/0x7d4 [ 26.328459] [ 26.328678] Last potentially related work creation: [ 26.329285] kasan_save_stack+0x22/0x50 [ 26.329809] __kasan_record_aux_stack+0x8e/0xa0 [ 26.330390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.331047] remove_vma+0x139/0x170 [ 26.331509] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.332103] do_vmi_munmap+0x1f1/0x2b0 [ 26.332593] __vm_munmap+0x138/0x3a0 [ 26.333066] __x64_sys_munmap+0x59/0x80 [ 26.333578] do_syscall_64+0x3f/0x90 [ 26.334058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.334708] [ 26.334929] Second to last potentially related work creation: [ 26.335633] kasan_save_stack+0x22/0x50 [ 26.336152] __kasan_record_aux_stack+0x8e/0xa0 [ 26.336729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.337376] remove_vma+0x139/0x170 [ 26.337832] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.338415] do_vmi_munmap+0x1f1/0x2b0 [ 26.338938] mmap_region+0x1f9/0x2660 [ 26.339426] do_mmap+0x854/0xf00 [ 26.339858] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.340366] ksys_mmap_pgoff+0x3af/0x500 [ 26.340874] do_syscall_64+0x3f/0x90 [ 26.341352] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.341997] [ 26.342216] The buggy address belongs to the object at ffff88800e3091d0 [ 26.342216] which belongs to the cache vm_area_struct of size 168 [ 26.343700] The buggy address is located 88 bytes inside of [ 26.343700] freed 168-byte region [ffff88800e3091d0, ffff88800e309278) [ 26.345139] [ 26.345360] The buggy address belongs to the physical page: [ 26.346034] page:00000000f5795f53 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe309 [ 26.347129] memcg:ffff88800e2ef001 [ 26.347558] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.348225] page_type: 0xffffffff() [ 26.348672] raw: 0100000000000200 ffff88800879fc80 ffffea00003badc0 dead000000000002 [ 26.349574] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2ef001 [ 26.350475] page dumped because: kasan: bad access detected [ 26.351139] [ 26.351354] Memory state around the buggy address: [ 26.351932] ffff88800e309100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 26.352791] ffff88800e309180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 26.353655] >ffff88800e309200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 26.354505] ^ [ 26.355059] ffff88800e309280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 26.355908] ffff88800e309300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 26.356828] ================================================================== [ 26.357971] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.175256] BUG: Bad rss-counter state mm:000000003408bf86 type:MM_FILEPAGES val:33 [ 28.176255] BUG: Bad rss-counter state mm:000000003408bf86 type:MM_ANONPAGES val:22 [ 28.737786] BUG: Bad rss-counter state mm:00000000b63efe17 type:MM_FILEPAGES val:33 [ 28.738973] BUG: Bad rss-counter state mm:00000000b63efe17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28943' (ECDSA) to the list of known hosts. 2023/06/19 21:05:41 fuzzer started 2023/06/19 21:05:41 dialing manager at localhost:44161 2023/06/19 21:05:41 checking machine... 2023/06/19 21:05:41 checking revisions... [ 29.474431] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:05:41 testing simple program... [ 29.536136] cgroup: Unknown subsys name 'net' [ 29.623901] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:05:38 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=00007f4d8cac00a0 CR3=0000000016b0c000 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=2031343a35303a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030343a35303a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001d05369 RBX=ffff88800e829b18 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e829b48 RBP=ffff8880190b4758 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff8880190b45e0 R14=ffffffff813782a8 R15=ffff888016f44900 RIP=ffffffff8184636c RFL=00000046 [---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 00007feb1fd2f900 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=00007feb1fd0e020 CR3=000000000ebde000 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=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