[ 32.463090] BUG: Bad rss-counter state mm:000000002c7d86a6 type:MM_FILEPAGES val:33 [ 32.463908] BUG: Bad rss-counter state mm:000000002c7d86a6 type:MM_ANONPAGES val:22 [ 32.645653] ================================================================== [ 32.646291] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.646953] Read of size 8 at addr ffff88800d4b3228 by task sshd/221 [ 32.647519] [ 32.647672] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.648237] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.648882] Call Trace: [ 32.649101] [ 32.649294] dump_stack_lvl+0x91/0xf0 [ 32.649629] print_report+0xcc/0x620 [ 32.649958] ? __virt_addr_valid+0x102/0x340 [ 32.650323] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.650739] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.667202] kasan_report+0xbe/0xf0 [ 32.667546] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.667969] vma_interval_tree_remove+0xc75/0xec0 [ 32.668375] vma_prepare+0xc54/0x11a0 [ 32.668704] __split_vma+0x5af/0x950 [ 32.669024] ? __pfx___split_vma+0x10/0x10 [ 32.669380] ? find_held_lock+0x2c/0x110 [ 32.669735] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.670117] ? lock_is_held_type+0x9f/0x120 [ 32.670482] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.670890] ? mtree_range_walk+0x632/0x900 [ 32.675322] ? mas_walk+0x5c7/0x7c0 [ 32.675649] do_vmi_munmap+0x1f1/0x2b0 [ 32.675979] mmap_region+0x1f9/0x2660 [ 32.676300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.676648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.677124] ? __pfx_lock_acquire+0x10/0x10 [ 32.677484] ? __pfx_mmap_region+0x10/0x10 [ 32.677844] ? security_mmap_addr+0x7d/0xa0 [ 32.678202] ? get_unmapped_area+0x1f5/0x3f0 [ 32.678573] do_mmap+0x854/0xf00 [ 32.678873] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.679236] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.679611] ksys_mmap_pgoff+0x3af/0x500 [ 32.679956] do_syscall_64+0x3f/0x90 [ 32.680289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.680722] RIP: 0033:0x7ff81da85d82 [ 32.681033] 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 [ 32.682421] RSP: 002b:00007ffdbe2943b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.687092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff81da85d82 [ 32.687651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff81cebf000 [ 32.688215] RBP: 00007ff81cebf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.688769] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6a465bf70 [ 32.689329] R13: 00007ffdbe2943d0 R14: 00007ffdbe294400 R15: 00007ffdbe294760 [ 32.689895] [ 32.690093] [ 32.690241] Allocated by task 212: [ 32.690530] kasan_save_stack+0x22/0x50 [ 32.690873] kasan_set_track+0x25/0x30 [ 32.695246] __kasan_slab_alloc+0x59/0x70 [ 32.695590] kmem_cache_alloc+0x16b/0x370 [ 32.695927] vm_area_dup+0x20/0x160 [ 32.696224] __split_vma+0x170/0x950 [ 32.696531] split_vma+0xc6/0x110 [ 32.696831] mprotect_fixup+0x8d2/0xb30 [ 32.697173] do_mprotect_pkey+0x87e/0xd40 [ 32.697522] __x64_sys_mprotect+0x78/0xc0 [ 32.697871] do_syscall_64+0x3f/0x90 [ 32.698196] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.698624] [ 32.698770] Freed by task 19: [ 32.703043] kasan_save_stack+0x22/0x50 [ 32.703388] kasan_set_track+0x25/0x30 [ 32.703760] kasan_save_free_info+0x2b/0x50 [ 32.704118] __kasan_slab_free+0x10a/0x190 [ 32.704471] kmem_cache_free+0x10d/0x4d0 [ 32.704847] rcu_core+0x8c8/0x2860 [ 32.705158] __do_softirq+0x1b7/0x7d4 [ 32.705476] [ 32.705623] Last potentially related work creation: [ 32.706012] kasan_save_stack+0x22/0x50 [ 32.706349] __kasan_record_aux_stack+0x8e/0xa0 [ 32.706734] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.711203] remove_vma+0x139/0x170 [ 32.711509] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.711880] do_vmi_munmap+0x1f1/0x2b0 [ 32.712205] __vm_munmap+0x138/0x3a0 [ 32.712521] __x64_sys_munmap+0x59/0x80 [ 32.712884] do_syscall_64+0x3f/0x90 [ 32.713205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.713625] [ 32.713789] The buggy address belongs to the object at ffff88800d4b31d0 [ 32.713789] which belongs to the cache vm_area_struct of size 168 [ 32.714771] The buggy address is located 88 bytes inside of [ 32.714771] freed 168-byte region [ffff88800d4b31d0, ffff88800d4b3278) [ 32.719712] [ 32.719862] The buggy address belongs to the physical page: [ 32.720300] page:00000000182d4c1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4b3 [ 32.721017] memcg:ffff88800df2f001 [ 32.721304] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.721768] page_type: 0xffffffff() [ 32.722062] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.722662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df2f001 [ 32.727309] page dumped because: kasan: bad access detected [ 32.727737] [ 32.727877] Memory state around the buggy address: [ 32.728252] ffff88800d4b3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.728805] ffff88800d4b3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.729356] >ffff88800d4b3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.729908] ^ [ 32.730282] ffff88800d4b3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.730856] ffff88800d4b3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.731482] ================================================================== [ 32.732508] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.305245] BUG: Bad rss-counter state mm:0000000067df96ff type:MM_FILEPAGES val:33 [ 38.305959] BUG: Bad rss-counter state mm:0000000067df96ff type:MM_ANONPAGES val:22 [ 39.911796] BUG: Bad rss-counter state mm:00000000d3836940 type:MM_FILEPAGES val:33 [ 39.912528] BUG: Bad rss-counter state mm:00000000d3836940 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49720' (ECDSA) to the list of known hosts. 2023/06/20 08:08:40 fuzzer started 2023/06/20 08:08:41 dialing manager at localhost:44161 2023/06/20 08:08:41 checking machine... 2023/06/20 08:08:41 checking revisions... [ 40.831175] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:08:41 testing simple program... [ 40.902694] cgroup: Unknown subsys name 'net' [ 40.991914] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:08:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff84499090 RDX=ffff88800fcdb680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88801596d81c RSP=ffff88800fdaee08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=ffff88801596dc0c R12=ffff88800fdaf0a1 R13=ffff88801596d81c R14=dffffc0000000000 R15=ffff88800fdaeea8 RIP=ffffffff844990b0 RFL=00000202 [-------] 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 00007f691e323900 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=00007ffd280de000 CR3=0000000017e18000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 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=00000046 [---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=00007f96a5eca328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000