[ 24.237490] BUG: Bad rss-counter state mm:00000000e1fc2f74 type:MM_FILEPAGES val:33 [ 24.238537] BUG: Bad rss-counter state mm:00000000e1fc2f74 type:MM_ANONPAGES val:22 [ 24.408898] ================================================================== [ 24.409991] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.411279] Read of size 8 at addr ffff8880195515c8 by task sshd/219 [ 24.412187] [ 24.412444] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.413462] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.414621] Call Trace: [ 24.414993] [ 24.415326] dump_stack_lvl+0x91/0xf0 [ 24.415900] print_report+0xcc/0x620 [ 24.416463] ? __virt_addr_valid+0x102/0x340 [ 24.417109] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.417845] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.418575] kasan_report+0xbe/0xf0 [ 24.419143] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.419889] vma_interval_tree_remove+0xc75/0xec0 [ 24.420610] vma_prepare+0xc54/0x11a0 [ 24.421178] __split_vma+0x5af/0x950 [ 24.421741] ? __pfx___split_vma+0x10/0x10 [ 24.422390] ? find_held_lock+0x2c/0x110 [ 24.423013] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.423683] ? lock_is_held_type+0x9f/0x120 [ 24.424323] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.425050] ? mtree_range_walk+0x632/0x900 [ 24.425710] ? mas_walk+0x5c7/0x7c0 [ 24.426284] do_vmi_munmap+0x1f1/0x2b0 [ 24.426873] mmap_region+0x1f9/0x2660 [ 24.427449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.428061] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.428912] ? __pfx_lock_acquire+0x10/0x10 [ 24.429550] ? __pfx_mmap_region+0x10/0x10 [ 24.430185] ? security_mmap_addr+0x7d/0xa0 [ 24.430848] ? get_unmapped_area+0x1f5/0x3f0 [ 24.431506] do_mmap+0x854/0xf00 [ 24.432027] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.432626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.433298] ksys_mmap_pgoff+0x3af/0x500 [ 24.433904] do_syscall_64+0x3f/0x90 [ 24.434467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.435218] RIP: 0033:0x7f79dda5bd82 [ 24.435752] 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 [ 24.438239] RSP: 002b:00007ffcd88a3158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.439300] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79dda5bd82 [ 24.440313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79dce95000 [ 24.441316] RBP: 00007f79dce95000 R08: 0000000000000009 R09: 0000000000001000 [ 24.442339] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dd53be1f70 [ 24.443350] R13: 00007ffcd88a3170 R14: 00007ffcd88a31a0 R15: 00007ffcd88a3500 [ 24.444369] [ 24.444720] [ 24.444980] Allocated by task 212: [ 24.445488] kasan_save_stack+0x22/0x50 [ 24.446081] kasan_set_track+0x25/0x30 [ 24.446677] __kasan_slab_alloc+0x59/0x70 [ 24.447292] kmem_cache_alloc+0x16b/0x370 [ 24.447891] vm_area_dup+0x20/0x160 [ 24.448422] __split_vma+0x170/0x950 [ 24.448961] split_vma+0xc6/0x110 [ 24.449468] mprotect_fixup+0x8d2/0xb30 [ 24.450059] do_mprotect_pkey+0x87e/0xd40 [ 24.450685] __x64_sys_mprotect+0x78/0xc0 [ 24.451295] do_syscall_64+0x3f/0x90 [ 24.451848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.452809] [ 24.453115] Freed by task 210: [ 24.453658] kasan_save_stack+0x22/0x50 [ 24.454392] kasan_set_track+0x25/0x30 [ 24.455080] kasan_save_free_info+0x2b/0x50 [ 24.455827] __kasan_slab_free+0x10a/0x190 [ 24.456573] kmem_cache_free+0x10d/0x4d0 [ 24.457276] rcu_core+0x8c8/0x2860 [ 24.457899] __do_softirq+0x1b7/0x7d4 [ 24.458574] [ 24.458872] Last potentially related work creation: [ 24.459692] kasan_save_stack+0x22/0x50 [ 24.460408] __kasan_record_aux_stack+0x8e/0xa0 [ 24.461201] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.462134] remove_vma+0x139/0x170 [ 24.462765] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.463437] do_vmi_munmap+0x1f1/0x2b0 [ 24.464019] __vm_munmap+0x138/0x3a0 [ 24.464583] __x64_sys_munmap+0x59/0x80 [ 24.465179] do_syscall_64+0x3f/0x90 [ 24.465742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.466527] [ 24.466784] The buggy address belongs to the object at ffff888019551570 [ 24.466784] which belongs to the cache vm_area_struct of size 168 [ 24.468557] The buggy address is located 88 bytes inside of [ 24.468557] freed 168-byte region [ffff888019551570, ffff888019551618) [ 24.470261] [ 24.470517] The buggy address belongs to the physical page: [ 24.471307] page:00000000d1a93af6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19551 [ 24.472615] memcg:ffff888019844c01 [ 24.473129] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.473965] page_type: 0xffffffff() [ 24.474529] raw: 0100000000000200 ffff88800879fc80 ffffea000037b980 dead000000000007 [ 24.475642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019844c01 [ 24.476731] page dumped because: kasan: bad access detected [ 24.477527] [ 24.477785] Memory state around the buggy address: [ 24.478497] ffff888019551480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.479603] ffff888019551500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.480653] >ffff888019551580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.481667] ^ [ 24.482475] ffff888019551600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.483493] ffff888019551680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.484514] ================================================================== [ 24.485663] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.747965] BUG: Bad rss-counter state mm:00000000389c934f type:MM_FILEPAGES val:33 [ 26.748965] BUG: Bad rss-counter state mm:00000000389c934f type:MM_ANONPAGES val:22 [ 27.265831] BUG: Bad rss-counter state mm:0000000060efbcfd type:MM_FILEPAGES val:33 [ 27.266880] BUG: Bad rss-counter state mm:0000000060efbcfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2328' (ECDSA) to the list of known hosts. 2023/06/19 21:38:11 fuzzer started 2023/06/19 21:38:11 dialing manager at localhost:44161 2023/06/19 21:38:11 checking machine... 2023/06/19 21:38:11 checking revisions... [ 28.063147] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:38:11 testing simple program... [ 28.103187] cgroup: Unknown subsys name 'net' [ 28.155355] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:38:10 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=ffff888008c58000 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=00007ffd02c2b278 CR3=000000000c4fc000 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=2030313a38333a3132203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000556e66fb3ed0 RCX=0000000000000000 RDX=0000000000000001 RSI=ffffffffffffffff RDI=0000556e66fb3ed0 RBP=0000556e66fb3ed0 RSP=00007fffa85b96f0 R8 =00007fc4e7a8f6f8 R9 =00007fc4e7a8515e R10=0000000000000000 R11=0000000000000287 R12=0000000000000400 R13=0000000000000000 R14=0000000000000000 R15=0000556e66fb3ed0 RIP=00007fc4e7f03447 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc4e7a8f900 00000000 00000000 GS =0000 0000000000000000 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=00007fc4e80470b0 CR3=00000000169d4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000