[ 29.279895] BUG: Bad rss-counter state mm:000000004743b288 type:MM_FILEPAGES val:33 [ 29.280595] BUG: Bad rss-counter state mm:000000004743b288 type:MM_ANONPAGES val:22 [ 29.446140] ================================================================== [ 29.447059] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.447992] Read of size 8 at addr ffff88800e374058 by task sshd/220 [ 29.448754] [ 29.448981] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.449979] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.450948] Call Trace: [ 29.451268] [ 29.451552] dump_stack_lvl+0x91/0xf0 [ 29.452042] print_report+0xcc/0x620 [ 29.452529] ? __virt_addr_valid+0x102/0x340 [ 29.453109] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.453724] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.454342] kasan_report+0xbe/0xf0 [ 29.454823] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.455443] vma_interval_tree_remove+0xc75/0xec0 [ 29.456044] vma_prepare+0xc54/0x11a0 [ 29.456526] __split_vma+0x5af/0x950 [ 29.457004] ? __pfx___split_vma+0x10/0x10 [ 29.457535] ? find_held_lock+0x2c/0x110 [ 29.458063] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.458632] ? lock_is_held_type+0x9f/0x120 [ 29.459175] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.459779] ? mtree_range_walk+0x632/0x900 [ 29.460327] ? mas_walk+0x5c7/0x7c0 [ 29.460805] do_vmi_munmap+0x1f1/0x2b0 [ 29.461328] mmap_region+0x1f9/0x2660 [ 29.461809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.462317] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.463033] ? __pfx_lock_acquire+0x10/0x10 [ 29.463567] ? __pfx_mmap_region+0x10/0x10 [ 29.464098] ? security_mmap_addr+0x7d/0xa0 [ 29.464627] ? get_unmapped_area+0x1f5/0x3f0 [ 29.465194] do_mmap+0x854/0xf00 [ 29.465636] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.466261] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.467001] ksys_mmap_pgoff+0x3af/0x500 [ 29.467590] do_syscall_64+0x3f/0x90 [ 29.468218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.469053] RIP: 0033:0x7fbc81232d82 [ 29.469547] 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 [ 29.471752] RSP: 002b:00007ffc143f0bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.472738] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc81232d82 [ 29.473594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc8066c000 [ 29.474445] RBP: 00007fbc8066c000 R08: 0000000000000009 R09: 0000000000001000 [ 29.475305] R10: 0000000000000812 R11: 0000000000000206 R12: 000055555e55ed90 [ 29.476158] R13: 00007ffc143f0bd0 R14: 00007ffc143f0c00 R15: 00007ffc143f0f60 [ 29.477059] [ 29.477353] [ 29.477601] Allocated by task 213: [ 29.478040] kasan_save_stack+0x22/0x50 [ 29.478550] kasan_set_track+0x25/0x30 [ 29.479047] __kasan_slab_alloc+0x59/0x70 [ 29.479591] kmem_cache_alloc+0x16b/0x370 [ 29.480133] vm_area_dup+0x20/0x160 [ 29.480597] __split_vma+0x170/0x950 [ 29.481104] split_vma+0xc6/0x110 [ 29.481593] mprotect_fixup+0x8d2/0xb30 [ 29.482100] do_mprotect_pkey+0x87e/0xd40 [ 29.482629] __x64_sys_mprotect+0x78/0xc0 [ 29.483158] do_syscall_64+0x3f/0x90 [ 29.483638] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.484299] [ 29.484515] Freed by task 213: [ 29.484928] kasan_save_stack+0x22/0x50 [ 29.485472] kasan_set_track+0x25/0x30 [ 29.485985] kasan_save_free_info+0x2b/0x50 [ 29.486528] __kasan_slab_free+0x10a/0x190 [ 29.487075] kmem_cache_free+0x10d/0x4d0 [ 29.487594] rcu_core+0x8c8/0x2860 [ 29.488052] __do_softirq+0x1b7/0x7d4 [ 29.488569] [ 29.488791] Last potentially related work creation: [ 29.489434] kasan_save_stack+0x22/0x50 [ 29.489954] __kasan_record_aux_stack+0x8e/0xa0 [ 29.490561] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.491222] remove_vma+0x139/0x170 [ 29.491705] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.492269] do_vmi_munmap+0x1f1/0x2b0 [ 29.492810] __vm_munmap+0x138/0x3a0 [ 29.493296] __x64_sys_munmap+0x59/0x80 [ 29.493841] do_syscall_64+0x3f/0x90 [ 29.494320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.494980] [ 29.495195] The buggy address belongs to the object at ffff88800e374000 [ 29.495195] which belongs to the cache vm_area_struct of size 168 [ 29.496726] The buggy address is located 88 bytes inside of [ 29.496726] freed 168-byte region [ffff88800e374000, ffff88800e3740a8) [ 29.498144] [ 29.498364] The buggy address belongs to the physical page: [ 29.499024] page:00000000f0f32d03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe374 [ 29.500121] memcg:ffff88800dfa7d01 [ 29.500554] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.501252] page_type: 0xffffffff() [ 29.501706] raw: 0100000000000200 ffff88800879fc80 ffffea00003f4d80 000000000000000c [ 29.502637] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfa7d01 [ 29.503553] page dumped because: kasan: bad access detected [ 29.504231] [ 29.504448] Memory state around the buggy address: [ 29.505047] ffff88800e373f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.505919] ffff88800e373f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 29.506775] >ffff88800e374000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.507634] ^ [ 29.508379] ffff88800e374080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 29.509256] ffff88800e374100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.510124] ================================================================== [ 29.511301] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.411500] BUG: Bad rss-counter state mm:000000000690091d type:MM_FILEPAGES val:33 [ 31.412868] BUG: Bad rss-counter state mm:000000000690091d type:MM_ANONPAGES val:22 [ 31.897807] BUG: Bad rss-counter state mm:0000000053c93a2d type:MM_FILEPAGES val:33 [ 31.898853] BUG: Bad rss-counter state mm:0000000053c93a2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35258' (ECDSA) to the list of known hosts. 2023/06/19 18:38:38 fuzzer started 2023/06/19 18:38:38 dialing manager at localhost:44161 2023/06/19 18:38:38 checking machine... 2023/06/19 18:38:38 checking revisions... [ 32.604276] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:38:38 testing simple program... [ 32.641896] cgroup: Unknown subsys name 'net' [ 32.679782] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:38:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcc212e3a8 CR3=0000000005482000 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=00007f3561b525100000559bf8cea790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800d63b540 RCX=1ffffffff0ac2cfa RDX=1ffff1100d9e7401 RSI=0000000000000008 RDI=ffffffff856167d0 RBP=0000000000000200 RSP=ffff88801472f7f0 R8 =ffffffff85616740 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffffffff81845c80 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000004e20 RIP=ffffffff81370b1e RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f43ee8b3900 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=00007f43edd36fb0 CR3=000000000da02000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=4528742bf656847700000000000ae988 XMM05=b0a40a669ef8b9e40000000000134988 XMM06=19e9129bd510f23500000000001334b0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000