[ 31.314752] BUG: Bad rss-counter state mm:00000000ae83f932 type:MM_FILEPAGES val:33 [ 31.315832] BUG: Bad rss-counter state mm:00000000ae83f932 type:MM_ANONPAGES val:22 [ 31.475413] ================================================================== [ 31.476484] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.477604] Read of size 8 at addr ffff888016f9e880 by task sshd/220 [ 31.478652] [ 31.478910] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.479951] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.481124] Call Trace: [ 31.481489] [ 31.481777] dump_stack_lvl+0x91/0xf0 [ 31.482271] print_report+0xcc/0x620 [ 31.482757] ? __virt_addr_valid+0x102/0x340 [ 31.483318] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.483940] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.484563] kasan_report+0xbe/0xf0 [ 31.485041] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.485672] vma_interval_tree_remove+0xc75/0xec0 [ 31.486279] vma_prepare+0xc54/0x11a0 [ 31.486767] __split_vma+0x5af/0x950 [ 31.487249] ? __pfx___split_vma+0x10/0x10 [ 31.487785] ? find_held_lock+0x2c/0x110 [ 31.488305] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.488883] ? lock_is_held_type+0x9f/0x120 [ 31.489418] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.490028] ? mtree_range_walk+0x632/0x900 [ 31.490581] ? mas_walk+0x5c7/0x7c0 [ 31.491058] do_vmi_munmap+0x1f1/0x2b0 [ 31.491569] mmap_region+0x1f9/0x2660 [ 31.492052] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.492564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.493282] ? __pfx_lock_acquire+0x10/0x10 [ 31.493820] ? __pfx_mmap_region+0x10/0x10 [ 31.494351] ? security_mmap_addr+0x7d/0xa0 [ 31.494882] ? get_unmapped_area+0x1f5/0x3f0 [ 31.495445] do_mmap+0x854/0xf00 [ 31.495893] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.496388] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.496956] ksys_mmap_pgoff+0x3af/0x500 [ 31.497463] do_syscall_64+0x3f/0x90 [ 31.497945] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.498604] RIP: 0033:0x7f9f6e9c9d82 [ 31.499062] 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 [ 31.501239] RSP: 002b:00007ffdda2de7e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.502147] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f6e9c9d82 [ 31.502998] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f6de03000 [ 31.503854] RBP: 00007f9f6de03000 R08: 0000000000000009 R09: 0000000000001000 [ 31.504709] R10: 0000000000000812 R11: 0000000000000206 R12: 000055610f775ec0 [ 31.505559] R13: 00007ffdda2de800 R14: 00007ffdda2de830 R15: 00007ffdda2deb90 [ 31.506420] [ 31.506713] [ 31.506932] Allocated by task 213: [ 31.507366] kasan_save_stack+0x22/0x50 [ 31.507872] kasan_set_track+0x25/0x30 [ 31.508372] __kasan_slab_alloc+0x59/0x70 [ 31.508901] kmem_cache_alloc+0x16b/0x370 [ 31.509424] vm_area_dup+0x20/0x160 [ 31.509886] __split_vma+0x170/0x950 [ 31.510357] split_vma+0xc6/0x110 [ 31.510808] mprotect_fixup+0x8d2/0xb30 [ 31.511337] do_mprotect_pkey+0x87e/0xd40 [ 31.511857] __x64_sys_mprotect+0x78/0xc0 [ 31.512383] do_syscall_64+0x3f/0x90 [ 31.512862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.513501] [ 31.513715] Freed by task 211: [ 31.514105] kasan_save_stack+0x22/0x50 [ 31.514605] kasan_set_track+0x25/0x30 [ 31.515103] kasan_save_free_info+0x2b/0x50 [ 31.515644] __kasan_slab_free+0x10a/0x190 [ 31.516181] kmem_cache_free+0x10d/0x4d0 [ 31.516690] rcu_core+0x8c8/0x2860 [ 31.517134] __do_softirq+0x1b7/0x7d4 [ 31.517614] [ 31.517830] Last potentially related work creation: [ 31.518421] kasan_save_stack+0x22/0x50 [ 31.518928] __kasan_record_aux_stack+0x8e/0xa0 [ 31.519583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.520236] remove_vma+0x139/0x170 [ 31.520691] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.521251] do_vmi_munmap+0x1f1/0x2b0 [ 31.521750] __vm_munmap+0x138/0x3a0 [ 31.522224] __x64_sys_munmap+0x59/0x80 [ 31.522722] do_syscall_64+0x3f/0x90 [ 31.523206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.523864] [ 31.524084] Second to last potentially related work creation: [ 31.524773] kasan_save_stack+0x22/0x50 [ 31.525279] __kasan_record_aux_stack+0x8e/0xa0 [ 31.525859] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.526506] remove_vma+0x139/0x170 [ 31.526964] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.527533] do_vmi_munmap+0x1f1/0x2b0 [ 31.528027] mmap_region+0x1f9/0x2660 [ 31.528510] do_mmap+0x854/0xf00 [ 31.528942] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.529440] ksys_mmap_pgoff+0x3af/0x500 [ 31.529949] do_syscall_64+0x3f/0x90 [ 31.530421] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.531063] [ 31.531296] The buggy address belongs to the object at ffff888016f9e828 [ 31.531296] which belongs to the cache vm_area_struct of size 168 [ 31.532766] The buggy address is located 88 bytes inside of [ 31.532766] freed 168-byte region [ffff888016f9e828, ffff888016f9e8d0) [ 31.534174] [ 31.534390] The buggy address belongs to the physical page: [ 31.535052] page:0000000006a9f8dc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f9e [ 31.536152] memcg:ffff888015ebc401 [ 31.536586] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.537294] page_type: 0xffffffff() [ 31.537750] raw: 0100000000000200 ffff8880087a0c80 ffffea0000366fc0 dead000000000005 [ 31.538676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015ebc401 [ 31.539599] page dumped because: kasan: bad access detected [ 31.540255] [ 31.540469] Memory state around the buggy address: [ 31.541048] ffff888016f9e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.541906] ffff888016f9e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.542761] >ffff888016f9e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.543632] ^ [ 31.544045] ffff888016f9e900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.544899] ffff888016f9e980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.545754] ================================================================== [ 31.546664] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.641937] BUG: Bad rss-counter state mm:00000000ea5af3bf type:MM_FILEPAGES val:33 [ 33.642976] BUG: Bad rss-counter state mm:00000000ea5af3bf type:MM_ANONPAGES val:22 [ 34.107530] BUG: Bad rss-counter state mm:0000000090a4b403 type:MM_FILEPAGES val:33 [ 34.108716] BUG: Bad rss-counter state mm:0000000090a4b403 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15485' (ECDSA) to the list of known hosts. 2023/06/21 06:34:08 fuzzer started 2023/06/21 06:34:08 dialing manager at localhost:36067 2023/06/21 06:34:08 checking machine... 2023/06/21 06:34:08 checking revisions... [ 34.793110] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:34:08 testing simple program... [ 34.844221] cgroup: Unknown subsys name 'net' [ 34.896242] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:34:08 Registers: info registers vcpu 0 RAX=ffffed1002dd2400 RBX=0000000000002000 RCX=0000000000000000 RDX=00000000000928c0 RSI=ffff888016e90000 RDI=ffff888008442280 RBP=ffff888008442280 RSP=ffff8880189af6c8 R8 =ffff8880189af6b0 R9 =0000000000000000 R10=ffffed1002dd2400 R11=00000000000b6a61 R12=ffff888016e90000 R13=00000000000928c0 R14=ffffffff8366a4d9 R15=0000000000002000 RIP=ffffffff8180f564 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 00007f6ac316d900 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=00007f6ac3724618 CR3=0000000018b12000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fd96cb2c650 CR3=000000000c6ee000 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=b3f9d31ae22c2893364979aa7ec34e51 XMM02=ec2efd57dc4c00df000000000011ec58 XMM03=e6ee4fa0daa8e159000000000011ed28 XMM04=957592dea340ee9a00000000000ae988 XMM05=19e9129bd510f2350000000000132808 XMM06=924f0744db0c471500000000001319e0 XMM07=e042d86d42eb936e0000000000121bd8 XMM08=e6ee4fa0daa8e159000000000011ed28 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000