[ 29.822946] BUG: Bad rss-counter state mm:000000004c77b9af type:MM_FILEPAGES val:33 [ 29.825016] BUG: Bad rss-counter state mm:000000004c77b9af type:MM_ANONPAGES val:22 [ 29.979330] ================================================================== [ 29.980427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.981543] Read of size 8 at addr ffff88800d78e6b0 by task sshd/218 [ 29.982658] [ 29.982921] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.983946] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.985136] Call Trace: [ 29.985517] [ 29.985809] dump_stack_lvl+0x91/0xf0 [ 29.986312] print_report+0xcc/0x620 [ 29.986795] ? __virt_addr_valid+0x102/0x340 [ 29.987352] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.987970] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.988583] kasan_report+0xbe/0xf0 [ 29.989058] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.989688] vma_interval_tree_remove+0xc75/0xec0 [ 29.990304] vma_prepare+0xc54/0x11a0 [ 29.990783] __split_vma+0x5af/0x950 [ 29.991262] ? __pfx___split_vma+0x10/0x10 [ 29.991797] ? find_held_lock+0x2c/0x110 [ 29.992317] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.992875] ? lock_is_held_type+0x9f/0x120 [ 29.993420] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.994024] ? mtree_range_walk+0x632/0x900 [ 29.994594] ? mas_walk+0x5c7/0x7c0 [ 29.995078] do_vmi_munmap+0x1f1/0x2b0 [ 29.995589] mmap_region+0x1f9/0x2660 [ 29.996073] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.996581] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.997294] ? __pfx_lock_acquire+0x10/0x10 [ 29.997825] ? __pfx_mmap_region+0x10/0x10 [ 29.998376] ? security_mmap_addr+0x7d/0xa0 [ 29.998912] ? get_unmapped_area+0x1f5/0x3f0 [ 29.999458] do_mmap+0x854/0xf00 [ 29.999914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.000422] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.000996] ksys_mmap_pgoff+0x3af/0x500 [ 30.001511] do_syscall_64+0x3f/0x90 [ 30.001997] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.002664] RIP: 0033:0x7f7a05ffbd82 [ 30.003127] 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 [ 30.005254] RSP: 002b:00007ffeecb73a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.006179] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a05ffbd82 [ 30.007033] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a05435000 [ 30.007879] RBP: 00007f7a05435000 R08: 0000000000000009 R09: 0000000000001000 [ 30.008724] R10: 0000000000000812 R11: 0000000000000206 R12: 000055eb85266d90 [ 30.009569] R13: 00007ffeecb73ab0 R14: 00007ffeecb73ae0 R15: 00007ffeecb73e40 [ 30.010439] [ 30.010735] [ 30.010950] Allocated by task 211: [ 30.011384] kasan_save_stack+0x22/0x50 [ 30.011898] kasan_set_track+0x25/0x30 [ 30.012388] __kasan_slab_alloc+0x59/0x70 [ 30.012920] kmem_cache_alloc+0x16b/0x370 [ 30.013436] vm_area_dup+0x20/0x160 [ 30.013891] __split_vma+0x170/0x950 [ 30.014368] split_vma+0xc6/0x110 [ 30.014804] mprotect_fixup+0x8d2/0xb30 [ 30.015303] do_mprotect_pkey+0x87e/0xd40 [ 30.015826] __x64_sys_mprotect+0x78/0xc0 [ 30.016344] do_syscall_64+0x3f/0x90 [ 30.016819] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.017456] [ 30.017672] Freed by task 19: [ 30.018060] kasan_save_stack+0x22/0x50 [ 30.018566] kasan_set_track+0x25/0x30 [ 30.019059] kasan_save_free_info+0x2b/0x50 [ 30.019599] __kasan_slab_free+0x10a/0x190 [ 30.020134] kmem_cache_free+0x10d/0x4d0 [ 30.020644] rcu_core+0x8c8/0x2860 [ 30.021086] __do_softirq+0x1b7/0x7d4 [ 30.021557] [ 30.021772] Last potentially related work creation: [ 30.022359] kasan_save_stack+0x22/0x50 [ 30.022858] __kasan_record_aux_stack+0x8e/0xa0 [ 30.023496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.024142] remove_vma+0x139/0x170 [ 30.024597] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.025149] do_vmi_munmap+0x1f1/0x2b0 [ 30.025635] __vm_munmap+0x138/0x3a0 [ 30.026121] __x64_sys_munmap+0x59/0x80 [ 30.026616] do_syscall_64+0x3f/0x90 [ 30.027092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.027738] [ 30.027966] The buggy address belongs to the object at ffff88800d78e658 [ 30.027966] which belongs to the cache vm_area_struct of size 168 [ 30.029425] The buggy address is located 88 bytes inside of [ 30.029425] freed 168-byte region [ffff88800d78e658, ffff88800d78e700) [ 30.030838] [ 30.031053] The buggy address belongs to the physical page: [ 30.031720] page:000000003e43a1a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd78e [ 30.032817] memcg:ffff88800ee6b001 [ 30.033249] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.033898] page_type: 0xffffffff() [ 30.034372] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.035306] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee6b001 [ 30.036207] page dumped because: kasan: bad access detected [ 30.036865] [ 30.037080] Memory state around the buggy address: [ 30.037659] ffff88800d78e580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.038531] ffff88800d78e600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.039387] >ffff88800d78e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.040236] ^ [ 30.040832] ffff88800d78e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.041690] ffff88800d78e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.042547] ================================================================== [ 30.043497] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.973717] BUG: Bad rss-counter state mm:000000005158db2a type:MM_FILEPAGES val:33 [ 31.974780] BUG: Bad rss-counter state mm:000000005158db2a type:MM_ANONPAGES val:22 [ 32.414708] BUG: Bad rss-counter state mm:000000000e0084b0 type:MM_FILEPAGES val:33 [ 32.415890] BUG: Bad rss-counter state mm:000000000e0084b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3865' (ECDSA) to the list of known hosts. 2023/06/20 00:47:43 fuzzer started 2023/06/20 00:47:43 dialing manager at localhost:44161 2023/06/20 00:47:43 checking machine... 2023/06/20 00:47:43 checking revisions... [ 33.027718] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:47:43 testing simple program... [ 33.077330] cgroup: Unknown subsys name 'net' [ 33.132505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:37 Registers: info registers vcpu 0 RAX=ffffffff83869446 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffffffff83869446 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b091 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015918000 R15=ffff8880097f5540 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007f8b7e5ff900 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=00007ffd33a4e000 CR3=000000001ca86000 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=00007efcdc1f8000 CR3=0000000019482000 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=2033343a37343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a37343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000