[ 34.853149] BUG: Bad rss-counter state mm:00000000d96326a2 type:MM_FILEPAGES val:33 [ 34.854356] BUG: Bad rss-counter state mm:00000000d96326a2 type:MM_ANONPAGES val:22 [ 34.995387] ================================================================== [ 34.996327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.997311] Read of size 8 at addr ffff88800dab8df0 by task sshd/219 [ 34.998097] [ 34.998434] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.999332] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.000339] Call Trace: [ 35.000686] [ 35.000976] dump_stack_lvl+0x91/0xf0 [ 35.001481] print_report+0xcc/0x620 [ 35.001987] ? __virt_addr_valid+0x102/0x340 [ 35.002557] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.003192] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.003824] kasan_report+0xbe/0xf0 [ 35.004311] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.004984] vma_interval_tree_remove+0xc75/0xec0 [ 35.005607] vma_prepare+0xc54/0x11a0 [ 35.006089] __split_vma+0x5af/0x950 [ 35.006583] ? __pfx___split_vma+0x10/0x10 [ 35.007113] ? find_held_lock+0x2c/0x110 [ 35.007660] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.008226] ? lock_is_held_type+0x9f/0x120 [ 35.008794] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.009408] ? mtree_range_walk+0x632/0x900 [ 35.009974] ? mas_walk+0x5c7/0x7c0 [ 35.010450] do_vmi_munmap+0x1f1/0x2b0 [ 35.010963] mmap_region+0x1f9/0x2660 [ 35.011453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.011985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.012744] ? __pfx_lock_acquire+0x10/0x10 [ 35.013282] ? __pfx_mmap_region+0x10/0x10 [ 35.013831] ? security_mmap_addr+0x7d/0xa0 [ 35.014367] ? get_unmapped_area+0x1f5/0x3f0 [ 35.014947] do_mmap+0x854/0xf00 [ 35.015400] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.015918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.016497] ksys_mmap_pgoff+0x3af/0x500 [ 35.017046] do_syscall_64+0x3f/0x90 [ 35.017546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.018198] RIP: 0033:0x7f240c5d8d82 [ 35.018673] 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 [ 35.020855] RSP: 002b:00007fff16004b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.021769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f240c5d8d82 [ 35.022638] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f240ba12000 [ 35.023498] RBP: 00007f240ba12000 R08: 0000000000000009 R09: 0000000000001000 [ 35.024360] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5ae289b20 [ 35.025255] R13: 00007fff16004b30 R14: 00007fff16004b60 R15: 00007fff16004ec0 [ 35.026131] [ 35.026426] [ 35.026653] Allocated by task 212: [ 35.027079] kasan_save_stack+0x22/0x50 [ 35.027598] kasan_set_track+0x25/0x30 [ 35.028094] __kasan_slab_alloc+0x59/0x70 [ 35.028638] kmem_cache_alloc+0x16b/0x370 [ 35.029175] vm_area_dup+0x20/0x160 [ 35.029662] __split_vma+0x170/0x950 [ 35.030137] split_vma+0xc6/0x110 [ 35.030600] mprotect_fixup+0x8d2/0xb30 [ 35.031104] do_mprotect_pkey+0x87e/0xd40 [ 35.031649] __x64_sys_mprotect+0x78/0xc0 [ 35.032173] do_syscall_64+0x3f/0x90 [ 35.032685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.033332] [ 35.033567] Freed by task 212: [ 35.033958] kasan_save_stack+0x22/0x50 [ 35.034464] kasan_set_track+0x25/0x30 [ 35.034994] kasan_save_free_info+0x2b/0x50 [ 35.035544] __kasan_slab_free+0x10a/0x190 [ 35.036082] kmem_cache_free+0x10d/0x4d0 [ 35.036604] rcu_core+0x8c8/0x2860 [ 35.037070] __do_softirq+0x1b7/0x7d4 [ 35.037569] [ 35.037785] Last potentially related work creation: [ 35.038385] kasan_save_stack+0x22/0x50 [ 35.038911] __kasan_record_aux_stack+0x8e/0xa0 [ 35.039498] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.040169] remove_vma+0x139/0x170 [ 35.040644] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.041235] do_vmi_munmap+0x1f1/0x2b0 [ 35.041743] __vm_munmap+0x138/0x3a0 [ 35.042215] __x64_sys_munmap+0x59/0x80 [ 35.042735] do_syscall_64+0x3f/0x90 [ 35.043218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.043884] [ 35.044099] Second to last potentially related work creation: [ 35.044821] kasan_save_stack+0x22/0x50 [ 35.045333] __kasan_record_aux_stack+0x8e/0xa0 [ 35.045937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.046593] remove_vma+0x139/0x170 [ 35.047047] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.047624] do_vmi_munmap+0x1f1/0x2b0 [ 35.048112] __vm_munmap+0x138/0x3a0 [ 35.048600] __x64_sys_munmap+0x59/0x80 [ 35.049124] do_syscall_64+0x3f/0x90 [ 35.049624] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.050323] [ 35.050612] The buggy address belongs to the object at ffff88800dab8d98 [ 35.050612] which belongs to the cache vm_area_struct of size 168 [ 35.052181] The buggy address is located 88 bytes inside of [ 35.052181] freed 168-byte region [ffff88800dab8d98, ffff88800dab8e40) [ 35.053657] [ 35.053879] The buggy address belongs to the physical page: [ 35.054556] page:000000002ce5e120 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdab8 [ 35.055661] memcg:ffff888009993301 [ 35.056091] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.056770] page_type: 0xffffffff() [ 35.057238] raw: 0100000000000200 ffff88800879fc80 ffffea0000380180 dead000000000004 [ 35.058185] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009993301 [ 35.059105] page dumped because: kasan: bad access detected [ 35.059791] [ 35.060016] Memory state around the buggy address: [ 35.060616] ffff88800dab8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 35.061508] ffff88800dab8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 35.062374] >ffff88800dab8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 35.063247] ^ [ 35.064079] ffff88800dab8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 35.064978] ffff88800dab8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.065853] ================================================================== [ 35.066848] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.935869] BUG: Bad rss-counter state mm:000000004345e6cf type:MM_FILEPAGES val:33 [ 36.937411] BUG: Bad rss-counter state mm:000000004345e6cf type:MM_ANONPAGES val:22 [ 37.400496] BUG: Bad rss-counter state mm:000000006cfad306 type:MM_FILEPAGES val:33 [ 37.401454] BUG: Bad rss-counter state mm:000000006cfad306 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44261' (ECDSA) to the list of known hosts. 2023/06/20 03:01:50 fuzzer started 2023/06/20 03:01:51 dialing manager at localhost:44161 2023/06/20 03:01:51 checking machine... 2023/06/20 03:01:51 checking revisions... [ 38.128781] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:01:51 testing simple program... [ 38.179071] cgroup: Unknown subsys name 'net' [ 38.228179] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:01:39 Registers: info registers vcpu 0 RAX=ffffffff863b22f5 RBX=0000000000000001 RCX=ffffffff863b22f0 RDX=0000000000000002 RSI=0000000000000005 RDI=ffffffff85fa3dec RBP=ffff888015fef7a0 RSP=ffff888015fef6d8 R8 =ffffffff863b22f0 R9 =ffff888015fef788 R10=0000000000038001 R11=000000000008aa86 R12=ffff888015fef7a8 R13=ffff888015fef790 R14=ffff888015fef789 R15=ffff888015fef748 RIP=ffffffff81130a72 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 00007f6d14522900 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=00007ffd4df37000 CR3=0000000009a7e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007fc702594d00 CR3=000000000eb90000 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=9190fe8fe8cca394a84989764ecf9301 XMM02=000000000011c720eff9b2d0a8fce9cb XMM03=000000000011c7f02c67c8bc2e329bc3 XMM04=d6b556f716b5a9e200000000000ae988 XMM05=dfcdbad4f1609c370000000000133f98 XMM06=806171799158d9670000000000133e20 XMM07=e042d86d42eb936e00000000001238b8 XMM08=2dbfeaea284dca7b000000000011c7f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000