[ 23.628601] BUG: Bad rss-counter state mm:0000000055c21d86 type:MM_FILEPAGES val:33 [ 23.629640] BUG: Bad rss-counter state mm:0000000055c21d86 type:MM_ANONPAGES val:22 [ 23.788427] ================================================================== [ 23.789393] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.790343] Read of size 8 at addr ffff88800e01c6b0 by task sshd/221 [ 23.791123] [ 23.791340] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.792293] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.793294] Call Trace: [ 23.793615] [ 23.793913] dump_stack_lvl+0x91/0xf0 [ 23.794416] print_report+0xcc/0x620 [ 23.794905] ? __virt_addr_valid+0x102/0x340 [ 23.795468] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.796088] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.796704] kasan_report+0xbe/0xf0 [ 23.797183] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.797860] vma_interval_tree_remove+0xc75/0xec0 [ 23.798473] vma_prepare+0xc54/0x11a0 [ 23.798958] __split_vma+0x5af/0x950 [ 23.799432] ? __pfx___split_vma+0x10/0x10 [ 23.799968] ? find_held_lock+0x2c/0x110 [ 23.800501] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.801076] ? lock_is_held_type+0x9f/0x120 [ 23.801637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.802250] ? mtree_range_walk+0x632/0x900 [ 23.802811] ? mas_walk+0x5c7/0x7c0 [ 23.803294] do_vmi_munmap+0x1f1/0x2b0 [ 23.803793] mmap_region+0x1f9/0x2660 [ 23.804290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.804809] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.805546] ? __pfx_lock_acquire+0x10/0x10 [ 23.806092] ? __pfx_mmap_region+0x10/0x10 [ 23.806628] ? security_mmap_addr+0x7d/0xa0 [ 23.807169] ? get_unmapped_area+0x1f5/0x3f0 [ 23.807726] do_mmap+0x854/0xf00 [ 23.808174] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.808676] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.809266] ksys_mmap_pgoff+0x3af/0x500 [ 23.809778] do_syscall_64+0x3f/0x90 [ 23.810265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.810924] RIP: 0033:0x7f1dcbe58d82 [ 23.811387] 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 [ 23.813534] RSP: 002b:00007ffd26c4b578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.814449] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1dcbe58d82 [ 23.815306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1dcb292000 [ 23.816171] RBP: 00007f1dcb292000 R08: 0000000000000009 R09: 0000000000001000 [ 23.817029] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d099188b20 [ 23.817891] R13: 00007ffd26c4b590 R14: 00007ffd26c4b5c0 R15: 00007ffd26c4b920 [ 23.818760] [ 23.819053] [ 23.819274] Allocated by task 213: [ 23.819710] kasan_save_stack+0x22/0x50 [ 23.820220] kasan_set_track+0x25/0x30 [ 23.820718] __kasan_slab_alloc+0x59/0x70 [ 23.821262] kmem_cache_alloc+0x16b/0x370 [ 23.821786] vm_area_dup+0x20/0x160 [ 23.822252] __split_vma+0x170/0x950 [ 23.822717] split_vma+0xc6/0x110 [ 23.823163] mprotect_fixup+0x8d2/0xb30 [ 23.823665] do_mprotect_pkey+0x87e/0xd40 [ 23.824190] __x64_sys_mprotect+0x78/0xc0 [ 23.824709] do_syscall_64+0x3f/0x90 [ 23.825189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.825848] [ 23.826068] Freed by task 13: [ 23.826454] kasan_save_stack+0x22/0x50 [ 23.826969] kasan_set_track+0x25/0x30 [ 23.827466] kasan_save_free_info+0x2b/0x50 [ 23.828009] __kasan_slab_free+0x10a/0x190 [ 23.828556] kmem_cache_free+0x10d/0x4d0 [ 23.829075] rcu_core+0x8c8/0x2860 [ 23.829542] __do_softirq+0x1b7/0x7d4 [ 23.830026] [ 23.830243] Last potentially related work creation: [ 23.830834] kasan_save_stack+0x22/0x50 [ 23.831340] __kasan_record_aux_stack+0x8e/0xa0 [ 23.831923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.832565] remove_vma+0x139/0x170 [ 23.833022] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.833623] do_vmi_munmap+0x1f1/0x2b0 [ 23.834118] __vm_munmap+0x138/0x3a0 [ 23.834591] __x64_sys_munmap+0x59/0x80 [ 23.835091] do_syscall_64+0x3f/0x90 [ 23.835569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.836226] [ 23.836446] The buggy address belongs to the object at ffff88800e01c658 [ 23.836446] which belongs to the cache vm_area_struct of size 168 [ 23.837943] The buggy address is located 88 bytes inside of [ 23.837943] freed 168-byte region [ffff88800e01c658, ffff88800e01c700) [ 23.839366] [ 23.839584] The buggy address belongs to the physical page: [ 23.840253] page:00000000973d0454 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe01c [ 23.841368] memcg:ffff88800d112501 [ 23.841802] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.842461] page_type: 0xffffffff() [ 23.842911] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.843830] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d112501 [ 23.844736] page dumped because: kasan: bad access detected [ 23.845401] [ 23.845617] Memory state around the buggy address: [ 23.846200] ffff88800e01c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.847045] ffff88800e01c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.847896] >ffff88800e01c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.848749] ^ [ 23.849345] ffff88800e01c700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.850199] ffff88800e01c780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.851040] ================================================================== [ 23.851982] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.526996] BUG: Bad rss-counter state mm:000000003c787d70 type:MM_FILEPAGES val:33 [ 25.527605] BUG: Bad rss-counter state mm:000000003c787d70 type:MM_ANONPAGES val:22 [ 25.877863] BUG: Bad rss-counter state mm:00000000b5dcdb66 type:MM_FILEPAGES val:33 [ 25.878941] BUG: Bad rss-counter state mm:00000000b5dcdb66 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49736' (ECDSA) to the list of known hosts. 2023/06/21 04:10:35 fuzzer started 2023/06/21 04:10:35 dialing manager at localhost:36067 2023/06/21 04:10:35 checking machine... 2023/06/21 04:10:35 checking revisions... [ 26.527503] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:10:35 testing simple program... [ 26.577741] cgroup: Unknown subsys name 'net' [ 26.632616] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:10:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b3584 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800b8f7a38 RSP=ffff88800b8f7970 R8 =ffffffff863b3588 R9 =ffff88800b8f7a20 R10=0000000000038001 R11=000000000008a96a R12=ffff88800b8f7a40 R13=ffff88800b8f7a28 R14=0000000000000005 R15=ffff88800b8f79e0 RIP=ffffffff81130b17 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 00007fa54068f900 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=00007ffeea451000 CR3=000000000e42c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f070da2bb20 CR3=000000000c646000 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=a90d832fe1a65ab045474d7677c9831f XMM02=000000000011a518ec2efd57dc4c00df XMM03=0000000000120f601bd498a96da8e81f XMM04=3664e9e24db4d05400000000000ae988 XMM05=998731a1747bc79e00000000001316c8 XMM06=00c3ffa147b8d85700000000001309f0 XMM07=e042d86d42eb936e0000000000121238 XMM08=1bd498a96da8e81f000000000011a578 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000