[ 26.489342] BUG: Bad rss-counter state mm:00000000336ec8d2 type:MM_FILEPAGES val:33 [ 26.490540] BUG: Bad rss-counter state mm:00000000336ec8d2 type:MM_ANONPAGES val:22 [ 26.613679] ================================================================== [ 26.614736] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.615671] Read of size 8 at addr ffff88801b523d08 by task sshd/219 [ 26.616321] [ 26.616477] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.617078] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.617759] Call Trace: [ 26.617984] [ 26.618203] dump_stack_lvl+0x91/0xf0 [ 26.618563] print_report+0xcc/0x620 [ 26.618905] ? __virt_addr_valid+0x102/0x340 [ 26.619296] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.619732] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.620162] kasan_report+0xbe/0xf0 [ 26.620506] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.620941] vma_interval_tree_remove+0xc75/0xec0 [ 26.621366] vma_prepare+0xc54/0x11a0 [ 26.621704] __split_vma+0x5af/0x950 [ 26.622037] ? __pfx___split_vma+0x10/0x10 [ 26.622421] ? find_held_lock+0x2c/0x110 [ 26.622793] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.623191] ? lock_is_held_type+0x9f/0x120 [ 26.623571] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.623999] ? mtree_range_walk+0x632/0x900 [ 26.624388] ? mas_walk+0x5c7/0x7c0 [ 26.624729] do_vmi_munmap+0x1f1/0x2b0 [ 26.625084] mmap_region+0x1f9/0x2660 [ 26.625429] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.625801] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.626338] ? __pfx_lock_acquire+0x10/0x10 [ 26.626729] ? __pfx_mmap_region+0x10/0x10 [ 26.627100] ? security_mmap_addr+0x7d/0xa0 [ 26.627368] ? get_unmapped_area+0x1f5/0x3f0 [ 26.627649] do_mmap+0x854/0xf00 [ 26.627871] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.628121] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.628407] ksys_mmap_pgoff+0x3af/0x500 [ 26.628663] do_syscall_64+0x3f/0x90 [ 26.628907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.629234] RIP: 0033:0x7fb279728d82 [ 26.629466] 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 [ 26.630538] RSP: 002b:00007ffc61509918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.630996] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb279728d82 [ 26.631422] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb278b62000 [ 26.631850] RBP: 00007fb278b62000 R08: 0000000000000009 R09: 0000000000001000 [ 26.632275] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644e675bec0 [ 26.632702] R13: 00007ffc61509930 R14: 00007ffc61509960 R15: 00007ffc61509cc0 [ 26.633135] [ 26.633283] [ 26.633393] Allocated by task 208: [ 26.633611] kasan_save_stack+0x22/0x50 [ 26.633866] kasan_set_track+0x25/0x30 [ 26.634118] __kasan_slab_alloc+0x59/0x70 [ 26.634388] kmem_cache_alloc+0x16b/0x370 [ 26.634653] vm_area_dup+0x20/0x160 [ 26.634884] __split_vma+0x170/0x950 [ 26.635120] split_vma+0xc6/0x110 [ 26.635344] mprotect_fixup+0x8d2/0xb30 [ 26.635599] do_mprotect_pkey+0x87e/0xd40 [ 26.635878] __x64_sys_mprotect+0x78/0xc0 [ 26.636142] do_syscall_64+0x3f/0x90 [ 26.636381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.636703] [ 26.636812] Freed by task 208: [ 26.637009] kasan_save_stack+0x22/0x50 [ 26.637264] kasan_set_track+0x25/0x30 [ 26.637515] kasan_save_free_info+0x2b/0x50 [ 26.637784] __kasan_slab_free+0x10a/0x190 [ 26.638053] kmem_cache_free+0x10d/0x4d0 [ 26.638326] rcu_core+0x8c8/0x2860 [ 26.638554] __do_softirq+0x1b7/0x7d4 [ 26.638794] [ 26.638902] Last potentially related work creation: [ 26.639197] kasan_save_stack+0x22/0x50 [ 26.639451] __kasan_record_aux_stack+0x8e/0xa0 [ 26.639740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.640062] remove_vma+0x139/0x170 [ 26.640290] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.640575] do_vmi_munmap+0x1f1/0x2b0 [ 26.640818] __vm_munmap+0x138/0x3a0 [ 26.641055] __x64_sys_munmap+0x59/0x80 [ 26.641305] do_syscall_64+0x3f/0x90 [ 26.641545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.641865] [ 26.641974] The buggy address belongs to the object at ffff88801b523cb0 [ 26.641974] which belongs to the cache vm_area_struct of size 168 [ 26.642709] The buggy address is located 88 bytes inside of [ 26.642709] freed 168-byte region [ffff88801b523cb0, ffff88801b523d58) [ 26.643410] [ 26.643520] The buggy address belongs to the physical page: [ 26.643850] page:00000000bb957b42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b523 [ 26.644394] memcg:ffff88801b482801 [ 26.644610] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.644933] page_type: 0xffffffff() [ 26.645160] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 26.645618] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b482801 [ 26.646071] page dumped because: kasan: bad access detected [ 26.646405] [ 26.646517] Memory state around the buggy address: [ 26.646807] ffff88801b523c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 26.647237] ffff88801b523c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 26.647664] >ffff88801b523d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 26.648086] ^ [ 26.648307] ffff88801b523d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 26.648739] ffff88801b523e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 26.649163] ================================================================== [ 26.649656] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.665293] BUG: Bad rss-counter state mm:0000000042d95d80 type:MM_FILEPAGES val:33 [ 28.666053] BUG: Bad rss-counter state mm:0000000042d95d80 type:MM_ANONPAGES val:22 [ 29.095572] BUG: Bad rss-counter state mm:0000000009e259b4 type:MM_FILEPAGES val:33 [ 29.096313] BUG: Bad rss-counter state mm:0000000009e259b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44713' (ECDSA) to the list of known hosts. 2023/06/19 14:43:17 fuzzer started 2023/06/19 14:43:17 dialing manager at localhost:44161 2023/06/19 14:43:17 checking machine... 2023/06/19 14:43:17 checking revisions... [ 29.781437] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:43:17 testing simple program... [ 29.824432] cgroup: Unknown subsys name 'net' [ 29.897028] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:43:14 Registers: info registers vcpu 0 RAX=ffffed1001d2477a RBX=ffffed1001d2477b RCX=ffffffff81162a20 RDX=ffffed1001d2477b RSI=0000000000000008 RDI=ffff88800e923bd0 RBP=ffffed1001d2477a RSP=ffff88806ce09e28 R8 =0000000000000000 R9 =ffffed1001d2477a R10=ffff88800e923bd7 R11=00000000000b6996 R12=ffff88800e8c5200 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800e8c51d0 RIP=ffffffff8180f009 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 00007f74a1f2e900 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=00007ffce08d2ff8 CR3=000000000e752000 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=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=00007fb569970370 CR3=0000000015ada000 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=2037313a33343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000