[ 28.457190] BUG: Bad rss-counter state mm:0000000050247d77 type:MM_FILEPAGES val:33 [ 28.458103] BUG: Bad rss-counter state mm:0000000050247d77 type:MM_ANONPAGES val:22 [ 28.620736] ================================================================== [ 28.621695] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.622721] Read of size 8 at addr ffff888019699140 by task sshd/218 [ 28.623551] [ 28.623783] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.624808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.625860] Call Trace: [ 28.626208] [ 28.626522] dump_stack_lvl+0x91/0xf0 [ 28.627053] print_report+0xcc/0x620 [ 28.627581] ? __virt_addr_valid+0x102/0x340 [ 28.628170] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.628839] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.629505] kasan_report+0xbe/0xf0 [ 28.630014] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.630631] vma_interval_tree_remove+0xc75/0xec0 [ 28.631232] vma_prepare+0xc54/0x11a0 [ 28.631686] __split_vma+0x5af/0x950 [ 28.632132] ? __pfx___split_vma+0x10/0x10 [ 28.632660] ? find_held_lock+0x2c/0x110 [ 28.633173] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.633729] ? lock_is_held_type+0x9f/0x120 [ 28.634260] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.634884] ? mtree_range_walk+0x632/0x900 [ 28.635438] ? mas_walk+0x5c7/0x7c0 [ 28.635903] do_vmi_munmap+0x1f1/0x2b0 [ 28.636386] mmap_region+0x1f9/0x2660 [ 28.636864] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.637365] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.638064] ? __pfx_lock_acquire+0x10/0x10 [ 28.638607] ? __pfx_mmap_region+0x10/0x10 [ 28.639132] ? security_mmap_addr+0x7d/0xa0 [ 28.639657] ? get_unmapped_area+0x1f5/0x3f0 [ 28.640203] do_mmap+0x854/0xf00 [ 28.640642] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.641135] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.641726] ksys_mmap_pgoff+0x3af/0x500 [ 28.642285] do_syscall_64+0x3f/0x90 [ 28.642828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.643521] RIP: 0033:0x7fd230c01d82 [ 28.644019] 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 [ 28.646344] RSP: 002b:00007ffcbb42ae28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.647356] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd230c01d82 [ 28.648291] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd23003b000 [ 28.649209] RBP: 00007fd23003b000 R08: 0000000000000009 R09: 0000000000001000 [ 28.650135] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e82fbdbd90 [ 28.651094] R13: 00007ffcbb42ae40 R14: 00007ffcbb42ae70 R15: 00007ffcbb42b1d0 [ 28.652028] [ 28.652349] [ 28.652582] Allocated by task 211: [ 28.653047] kasan_save_stack+0x22/0x50 [ 28.653593] kasan_set_track+0x25/0x30 [ 28.654132] __kasan_slab_alloc+0x59/0x70 [ 28.654708] kmem_cache_alloc+0x16b/0x370 [ 28.655276] vm_area_dup+0x20/0x160 [ 28.655774] __split_vma+0x170/0x950 [ 28.656286] split_vma+0xc6/0x110 [ 28.656819] mprotect_fixup+0x8d2/0xb30 [ 28.657379] do_mprotect_pkey+0x87e/0xd40 [ 28.657951] __x64_sys_mprotect+0x78/0xc0 [ 28.658522] do_syscall_64+0x3f/0x90 [ 28.659062] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.659771] [ 28.660009] Freed by task 211: [ 28.660443] kasan_save_stack+0x22/0x50 [ 28.660995] kasan_set_track+0x25/0x30 [ 28.661541] kasan_save_free_info+0x2b/0x50 [ 28.662122] __kasan_slab_free+0x10a/0x190 [ 28.662716] kmem_cache_free+0x10d/0x4d0 [ 28.663274] rcu_core+0x8c8/0x2860 [ 28.663765] __do_softirq+0x1b7/0x7d4 [ 28.664282] [ 28.664520] Last potentially related work creation: [ 28.665159] kasan_save_stack+0x22/0x50 [ 28.665703] __kasan_record_aux_stack+0x8e/0xa0 [ 28.666330] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.667044] remove_vma+0x139/0x170 [ 28.667535] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.668143] do_vmi_munmap+0x1f1/0x2b0 [ 28.668669] __vm_munmap+0x138/0x3a0 [ 28.669175] __x64_sys_munmap+0x59/0x80 [ 28.669716] do_syscall_64+0x3f/0x90 [ 28.670237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.670941] [ 28.671177] Second to last potentially related work creation: [ 28.671936] kasan_save_stack+0x22/0x50 [ 28.672485] __kasan_record_aux_stack+0x8e/0xa0 [ 28.673115] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.673823] remove_vma+0x139/0x170 [ 28.674316] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.674939] do_vmi_munmap+0x1f1/0x2b0 [ 28.675474] mmap_region+0x1f9/0x2660 [ 28.675995] do_mmap+0x854/0xf00 [ 28.676460] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.676991] ksys_mmap_pgoff+0x3af/0x500 [ 28.677536] do_syscall_64+0x3f/0x90 [ 28.678060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.678788] [ 28.679027] The buggy address belongs to the object at ffff8880196990e8 [ 28.679027] which belongs to the cache vm_area_struct of size 168 [ 28.680663] The buggy address is located 88 bytes inside of [ 28.680663] freed 168-byte region [ffff8880196990e8, ffff888019699190) [ 28.682202] [ 28.682441] The buggy address belongs to the physical page: [ 28.683172] page:0000000081fd931b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19699 [ 28.684358] memcg:ffff888019690201 [ 28.684829] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.685526] page_type: 0xffffffff() [ 28.686018] raw: 0100000000000200 ffff88800879fc80 ffffea0000587140 0000000000000006 [ 28.687033] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019690201 [ 28.688025] page dumped because: kasan: bad access detected [ 28.688761] [ 28.688996] Memory state around the buggy address: [ 28.689640] ffff888019699000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.690599] ffff888019699080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.691541] >ffff888019699100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.692477] ^ [ 28.693174] ffff888019699180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.694119] ffff888019699200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.695064] ================================================================== [ 28.696155] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.510460] BUG: Bad rss-counter state mm:0000000098c12e1e type:MM_FILEPAGES val:33 [ 30.511719] BUG: Bad rss-counter state mm:0000000098c12e1e type:MM_ANONPAGES val:22 [ 31.076057] BUG: Bad rss-counter state mm:00000000202d2902 type:MM_FILEPAGES val:33 [ 31.077220] BUG: Bad rss-counter state mm:00000000202d2902 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17583' (ECDSA) to the list of known hosts. 2023/06/19 11:11:16 fuzzer started 2023/06/19 11:11:16 dialing manager at localhost:44161 2023/06/19 11:11:17 checking machine... 2023/06/19 11:11:17 checking revisions... [ 31.702615] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:11:17 testing simple program... [ 31.755858] cgroup: Unknown subsys name 'net' [ 31.809621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:11:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800cc7d800 RCX=ffff88800cc7d800 RDX=0000000080200016 RSI=ffff88800cc7d800 RDI=ffff888008441640 RBP=ffff888016e67c88 RSP=ffff888016e67bf0 R8 =0000000080200015 R9 =0000000000000000 R10=ffffea0000331f40 R11=0000000080070003 R12=ffffea0000331f40 R13=ffff88800cc7da00 R14=0000000080200015 R15=ffff888008441640 RIP=ffffffff818094f2 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 00007ff07fd18900 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=00007ffe1f6ec000 CR3=000000001caf6000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f5293d36680 CR3=0000000019710000 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=2036313a31313a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31313a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000