[ 59.512898] BUG: Bad rss-counter state mm:00000000420ee7e4 type:MM_FILEPAGES val:33 [ 59.513541] BUG: Bad rss-counter state mm:00000000420ee7e4 type:MM_ANONPAGES val:22 [ 59.683346] ================================================================== [ 59.683959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 59.684599] Read of size 8 at addr ffff888016ece6b0 by task sshd/220 [ 59.685127] [ 59.685270] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 59.685934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 59.686559] Call Trace: [ 59.686770] [ 59.686961] dump_stack_lvl+0x91/0xf0 [ 59.687284] print_report+0xcc/0x620 [ 59.687622] ? __virt_addr_valid+0x102/0x340 [ 59.687992] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.688388] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.688802] kasan_report+0xbe/0xf0 [ 59.689125] ? vma_interval_tree_remove+0xc75/0xec0 [ 59.689528] vma_interval_tree_remove+0xc75/0xec0 [ 59.689924] vma_prepare+0xc54/0x11a0 [ 59.690236] __split_vma+0x5af/0x950 [ 59.690549] ? __pfx___split_vma+0x10/0x10 [ 59.690905] ? find_held_lock+0x2c/0x110 [ 59.691244] do_vmi_align_munmap+0x2ba/0x11f0 [ 59.691611] ? lock_is_held_type+0x9f/0x120 [ 59.691961] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 59.692353] ? mtree_range_walk+0x632/0x900 [ 59.692771] ? mas_walk+0x5c7/0x7c0 [ 59.693087] do_vmi_munmap+0x1f1/0x2b0 [ 59.693403] mmap_region+0x1f9/0x2660 [ 59.693752] ? vm_mmap_pgoff+0x15c/0x3a0 [ 59.694099] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 59.694567] ? __pfx_lock_acquire+0x10/0x10 [ 59.694921] ? __pfx_mmap_region+0x10/0x10 [ 59.695265] ? security_mmap_addr+0x7d/0xa0 [ 59.695642] ? get_unmapped_area+0x1f5/0x3f0 [ 59.696002] do_mmap+0x854/0xf00 [ 59.696292] vm_mmap_pgoff+0x1a6/0x3a0 [ 59.696620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 59.697041] ksys_mmap_pgoff+0x3af/0x500 [ 59.697371] do_syscall_64+0x3f/0x90 [ 59.697682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.698104] RIP: 0033:0x7f7f89d67d82 [ 59.698404] 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 [ 59.699841] RSP: 002b:00007ffe3edf3448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 59.700426] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f89d67d82 [ 59.701037] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f891a1000 [ 59.701582] RBP: 00007f7f891a1000 R08: 0000000000000009 R09: 0000000000001000 [ 59.702168] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ce77c3f70 [ 59.702715] R13: 00007ffe3edf3460 R14: 00007ffe3edf3490 R15: 00007ffe3edf37f0 [ 59.703269] [ 59.703462] [ 59.703608] Allocated by task 213: [ 59.703886] kasan_save_stack+0x22/0x50 [ 59.704222] kasan_set_track+0x25/0x30 [ 59.704540] __kasan_slab_alloc+0x59/0x70 [ 59.704932] kmem_cache_alloc+0x16b/0x370 [ 59.705270] vm_area_dup+0x20/0x160 [ 59.705581] __split_vma+0x170/0x950 [ 59.705901] split_vma+0xc6/0x110 [ 59.706182] mprotect_fixup+0x8d2/0xb30 [ 59.706506] do_mprotect_pkey+0x87e/0xd40 [ 59.706890] __x64_sys_mprotect+0x78/0xc0 [ 59.707228] do_syscall_64+0x3f/0x90 [ 59.707534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.707951] [ 59.708093] Freed by task 211: [ 59.708348] kasan_save_stack+0x22/0x50 [ 59.708677] kasan_set_track+0x25/0x30 [ 59.709024] kasan_save_free_info+0x2b/0x50 [ 59.709370] __kasan_slab_free+0x10a/0x190 [ 59.709726] kmem_cache_free+0x10d/0x4d0 [ 59.710062] rcu_core+0x8c8/0x2860 [ 59.710352] __do_softirq+0x1b7/0x7d4 [ 59.710662] [ 59.710802] Last potentially related work creation: [ 59.711180] kasan_save_stack+0x22/0x50 [ 59.711507] __kasan_record_aux_stack+0x8e/0xa0 [ 59.711883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 59.712296] remove_vma+0x139/0x170 [ 59.712587] do_vmi_align_munmap+0xd4a/0x11f0 [ 59.717010] do_vmi_munmap+0x1f1/0x2b0 [ 59.717328] __vm_munmap+0x138/0x3a0 [ 59.717637] __x64_sys_munmap+0x59/0x80 [ 59.718006] do_syscall_64+0x3f/0x90 [ 59.718318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 59.718769] [ 59.718912] The buggy address belongs to the object at ffff888016ece658 [ 59.718912] which belongs to the cache vm_area_struct of size 168 [ 59.719885] The buggy address is located 88 bytes inside of [ 59.719885] freed 168-byte region [ffff888016ece658, ffff888016ece700) [ 59.720813] [ 59.720956] The buggy address belongs to the physical page: [ 59.721387] page:000000007ff74550 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ece [ 59.722113] memcg:ffff88800e1fb001 [ 59.722391] flags: 0x100000000000200(slab|node=0|zone=1) [ 59.722855] page_type: 0xffffffff() [ 59.723155] raw: 0100000000000200 ffff88800879fc80 ffffea00003b4d00 dead000000000002 [ 59.729145] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1fb001 [ 59.729766] page dumped because: kasan: bad access detected [ 59.730191] [ 59.730332] Memory state around the buggy address: [ 59.730712] ffff888016ece580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.731294] ffff888016ece600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 59.731850] >ffff888016ece680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.732394] ^ [ 59.732817] ffff888016ece700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 59.733370] ffff888016ece780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 59.733928] ================================================================== [ 59.736863] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.992071] BUG: Bad rss-counter state mm:00000000ab88558f type:MM_FILEPAGES val:33 [ 63.004860] BUG: Bad rss-counter state mm:00000000ab88558f type:MM_ANONPAGES val:22 [ 63.819215] BUG: Bad rss-counter state mm:00000000ae6cccc7 type:MM_FILEPAGES val:33 [ 63.819898] BUG: Bad rss-counter state mm:00000000ae6cccc7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44622' (ECDSA) to the list of known hosts. 2023/06/20 10:09:06 fuzzer started 2023/06/20 10:09:07 dialing manager at localhost:44161 2023/06/20 10:09:07 checking machine... 2023/06/20 10:09:07 checking revisions... [ 64.679085] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:09:07 testing simple program... [ 64.738079] cgroup: Unknown subsys name 'net' [ 64.826197] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:08:38 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=00007f3c9c2516f8 CR3=000000000ca9a000 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=2036303a39303a3031203032206e754a XMM01=5d3839383931382e33362020205b203a XMM02=415f4d4d3a6570797420376363636336 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88800fdcfef0 R8 =0000000000000000 R9 =1ffffffff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000101 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180ef14 RFL=00000082 [--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 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=00007ffabd384458 CR3=0000000009c6a000 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=756e696c2d34365f3638782f62696c2f XMM01=00312e6f732e7a62696c2f756e672d78 XMM02=ffff000000000000ffffffffffffff00 XMM03=ffffffffff0000ffffffffff00000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000