[ 37.325142] BUG: Bad rss-counter state mm:00000000092af853 type:MM_FILEPAGES val:33 [ 37.326341] BUG: Bad rss-counter state mm:00000000092af853 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.398684] ================================================================== [ 37.400014] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.401346] Read of size 8 at addr ffff88800daed058 by task sshd/218 [ 37.402314] [ 37.402584] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.403689] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.404887] Call Trace: [ 37.405288] <TASK> [ 37.405632] dump_stack_lvl+0x91/0xf0 [ 37.406233] print_report+0xcc/0x620 [ 37.406824] ? __virt_addr_valid+0x102/0x340 [ 37.407518] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.408259] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.409006] kasan_report+0xbe/0xf0 [ 37.409578] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.410326] vma_interval_tree_remove+0xc75/0xec0 [ 37.411041] vma_prepare+0xc54/0x11a0 [ 37.411630] __split_vma+0x5af/0x950 [ 37.412202] ? __pfx___split_vma+0x10/0x10 [ 37.412850] ? find_held_lock+0x2c/0x110 [ 37.413483] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.414166] ? lock_is_held_type+0x9f/0x120 [ 37.414832] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.415567] ? mtree_range_walk+0x632/0x900 [ 37.416224] ? mas_walk+0x5c7/0x7c0 [ 37.416802] do_vmi_munmap+0x1f1/0x2b0 [ 37.417397] mmap_region+0x1f9/0x2660 [ 37.417982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.418596] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.419475] ? __pfx_lock_acquire+0x10/0x10 [ 37.420121] ? __pfx_mmap_region+0x10/0x10 [ 37.420772] ? security_mmap_addr+0x7d/0xa0 [ 37.421419] ? get_unmapped_area+0x1f5/0x3f0 [ 37.422093] do_mmap+0x854/0xf00 [ 37.422636] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.423240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.423923] ksys_mmap_pgoff+0x3af/0x500 [ 37.424542] do_syscall_64+0x3f/0x90 [ 37.425114] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.425896] RIP: 0033:0x7f8be321dd82 [ 37.426464] 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 [ 37.429087] RSP: 002b:00007ffd79a99b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.430191] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8be321dd82 [ 37.431228] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8be2657000 [ 37.432279] RBP: 00007f8be2657000 R08: 0000000000000009 R09: 0000000000001000 [ 37.433336] R10: 0000000000000812 R11: 0000000000000206 R12: 000055af4351dec0 [ 37.434367] R13: 00007ffd79a99b60 R14: 00007ffd79a99b90 R15: 00007ffd79a99ef0 [ 37.435414] </TASK> [ 37.435768] [ 37.436028] Allocated by task 211: [ 37.436556] kasan_save_stack+0x22/0x50 [ 37.437167] kasan_set_track+0x25/0x30 [ 37.437759] __kasan_slab_alloc+0x59/0x70 [ 37.438391] kmem_cache_alloc+0x16b/0x370 [ 37.439014] vm_area_dup+0x20/0x160 [ 37.439587] __split_vma+0x170/0x950 [ 37.440163] split_vma+0xc6/0x110 [ 37.440707] mprotect_fixup+0x8d2/0xb30 [ 37.441331] do_mprotect_pkey+0x87e/0xd40 [ 37.441971] __x64_sys_mprotect+0x78/0xc0 [ 37.442604] do_syscall_64+0x3f/0x90 [ 37.443189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.443992] [ 37.444256] Freed by task 211: [ 37.444730] kasan_save_stack+0x22/0x50 [ 37.445324] kasan_set_track+0x25/0x30 [ 37.445924] kasan_save_free_info+0x2b/0x50 [ 37.446581] __kasan_slab_free+0x10a/0x190 [ 37.447216] kmem_cache_free+0x10d/0x4d0 [ 37.447837] rcu_core+0x8c8/0x2860 [ 37.448381] __do_softirq+0x1b7/0x7d4 [ 37.448945] [ 37.449205] Last potentially related work creation: [ 37.449919] kasan_save_stack+0x22/0x50 [ 37.450521] __kasan_record_aux_stack+0x8e/0xa0 [ 37.451213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.452004] remove_vma+0x139/0x170 [ 37.452555] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.453226] do_vmi_munmap+0x1f1/0x2b0 [ 37.453807] __vm_munmap+0x138/0x3a0 [ 37.454366] __x64_sys_munmap+0x59/0x80 [ 37.454962] do_syscall_64+0x3f/0x90 [ 37.455544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.456321] [ 37.456584] The buggy address belongs to the object at ffff88800daed000 [ 37.456584] which belongs to the cache vm_area_struct of size 168 [ 37.458384] The buggy address is located 88 bytes inside of [ 37.458384] freed 168-byte region [ffff88800daed000, ffff88800daed0a8) [ 37.460117] [ 37.460374] The buggy address belongs to the physical page: [ 37.461183] page:00000000d2688f4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdaed [ 37.462498] memcg:ffff88800eb6e801 [ 37.463015] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.463830] page_type: 0xffffffff() [ 37.464369] raw: 0100000000000200 ffff88800879fc80 ffffea0000361040 dead000000000004 [ 37.465486] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb6e801 [ 37.466584] page dumped because: kasan: bad access detected [ 37.467410] [ 37.467665] Memory state around the buggy address: [ 37.468374] ffff88800daecf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 37.469430] ffff88800daecf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.470478] >ffff88800daed000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.471518] ^ [ 37.472416] ffff88800daed080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 37.473463] ffff88800daed100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.474514] ================================================================== [ 37.475748] Disabling lock debugging due to kernel taint [ 39.575574] BUG: Bad rss-counter state mm:00000000ec47d6e2 type:MM_FILEPAGES val:33 [ 39.576566] BUG: Bad rss-counter state mm:00000000ec47d6e2 type:MM_ANONPAGES val:22 [ 40.134593] BUG: Bad rss-counter state mm:00000000703ac094 type:MM_FILEPAGES val:33 [ 40.135608] BUG: Bad rss-counter state mm:00000000703ac094 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63228' (ECDSA) to the list of known hosts. 2023/06/19 13:53:09 fuzzer started 2023/06/19 13:53:09 dialing manager at localhost:44161 2023/06/19 13:53:09 checking machine... 2023/06/19 13:53:09 checking revisions... [ 40.796014] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:53:09 testing simple program... [ 40.845580] cgroup: Unknown subsys name 'net' [ 40.898036] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:53:03 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff816219d9 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=000000000000005a RSP=ffff888016dafac8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019ba2c78 R14=ffffffff8493c2c0 R15=0000000000000ac1 RIP=ffffffff814c01d0 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 00007f884eb3f700 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=00007ff820e430b0 CR3=000000000de42000 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=2038303a33353a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a33353a3331203931 XMM08=3d656e696c646d632022656369767265 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=00007f2e1d5b6d20 CR3=000000000d746000 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=aa25b10cd914489e19454d1ead189128 XMM02=2c67c8bc2e329bc3000000000011da48 XMM03=fb795ef6d65770560000000000124000 XMM04=ad53f97d32b0413800000000000ae988 XMM05=751b9502027dc0b900000000001338d8 XMM06=5465ffd380a22e070000000000132ab0 XMM07=e042d86d42eb936e0000000000124280 XMM08=2bb121da02b62b13000000000011daa8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000