syzkaller login: [ 37.287589] BUG: Bad rss-counter state mm:000000001cb0e9a3 type:MM_FILEPAGES val:33 [ 37.288630] BUG: Bad rss-counter state mm:000000001cb0e9a3 type:MM_ANONPAGES val:22 [ 37.453819] ================================================================== [ 37.454768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.455752] Read of size 8 at addr ffff88800eec1798 by task sshd/220 [ 37.456558] [ 37.456852] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.457750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.458759] Call Trace: [ 37.459106] [ 37.459401] dump_stack_lvl+0x91/0xf0 [ 37.459970] print_report+0xcc/0x620 [ 37.460492] ? __virt_addr_valid+0x102/0x340 [ 37.461062] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.461699] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.462337] kasan_report+0xbe/0xf0 [ 37.462862] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.463528] vma_interval_tree_remove+0xc75/0xec0 [ 37.464155] vma_prepare+0xc54/0x11a0 [ 37.464652] __split_vma+0x5af/0x950 [ 37.465141] ? __pfx___split_vma+0x10/0x10 [ 37.465698] ? find_held_lock+0x2c/0x110 [ 37.466231] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.466823] ? lock_is_held_type+0x9f/0x120 [ 37.467374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.468019] ? mtree_range_walk+0x632/0x900 [ 37.468591] ? mas_walk+0x5c7/0x7c0 [ 37.469079] do_vmi_munmap+0x1f1/0x2b0 [ 37.469598] mmap_region+0x1f9/0x2660 [ 37.470150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.470712] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.471472] ? __pfx_lock_acquire+0x10/0x10 [ 37.472027] ? __pfx_mmap_region+0x10/0x10 [ 37.472584] ? security_mmap_addr+0x7d/0xa0 [ 37.473139] ? get_unmapped_area+0x1f5/0x3f0 [ 37.473712] do_mmap+0x854/0xf00 [ 37.474168] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.474691] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.475276] ksys_mmap_pgoff+0x3af/0x500 [ 37.475839] do_syscall_64+0x3f/0x90 [ 37.476342] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.477017] RIP: 0033:0x7f7b2f720d82 [ 37.477496] 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 [ 37.479716] RSP: 002b:00007ffe967c7f98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.480657] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7b2f720d82 [ 37.481537] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7b2eb5a000 [ 37.482417] RBP: 00007f7b2eb5a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.483293] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c3c042b20 [ 37.484181] R13: 00007ffe967c7fb0 R14: 00007ffe967c7fe0 R15: 00007ffe967c8340 [ 37.485086] [ 37.485389] [ 37.485615] Allocated by task 213: [ 37.486060] kasan_save_stack+0x22/0x50 [ 37.486590] kasan_set_track+0x25/0x30 [ 37.487106] __kasan_slab_alloc+0x59/0x70 [ 37.487683] kmem_cache_alloc+0x16b/0x370 [ 37.488212] vm_area_dup+0x20/0x160 [ 37.488685] __split_vma+0x170/0x950 [ 37.489167] split_vma+0xc6/0x110 [ 37.489629] mprotect_fixup+0x8d2/0xb30 [ 37.490147] do_mprotect_pkey+0x87e/0xd40 [ 37.490693] __x64_sys_mprotect+0x78/0xc0 [ 37.491236] do_syscall_64+0x3f/0x90 [ 37.491732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.492396] [ 37.492621] Freed by task 19: [ 37.493015] kasan_save_stack+0x22/0x50 [ 37.493544] kasan_set_track+0x25/0x30 [ 37.494052] kasan_save_free_info+0x2b/0x50 [ 37.494613] __kasan_slab_free+0x10a/0x190 [ 37.495162] kmem_cache_free+0x10d/0x4d0 [ 37.495709] rcu_core+0x8c8/0x2860 [ 37.496168] __do_softirq+0x1b7/0x7d4 [ 37.496736] [ 37.496960] Last potentially related work creation: [ 37.497573] kasan_save_stack+0x22/0x50 [ 37.498101] __kasan_record_aux_stack+0x8e/0xa0 [ 37.498745] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.499426] remove_vma+0x139/0x170 [ 37.499921] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.500529] do_vmi_munmap+0x1f1/0x2b0 [ 37.501035] __vm_munmap+0x138/0x3a0 [ 37.501548] __x64_sys_munmap+0x59/0x80 [ 37.502081] do_syscall_64+0x3f/0x90 [ 37.502572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.503240] [ 37.503471] The buggy address belongs to the object at ffff88800eec1740 [ 37.503471] which belongs to the cache vm_area_struct of size 168 [ 37.505008] The buggy address is located 88 bytes inside of [ 37.505008] freed 168-byte region [ffff88800eec1740, ffff88800eec17e8) [ 37.506463] [ 37.506692] The buggy address belongs to the physical page: [ 37.507368] page:000000008491be31 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeec1 [ 37.508506] memcg:ffff88800cc76101 [ 37.508946] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.509623] page_type: 0xffffffff() [ 37.510089] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.511041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cc76101 [ 37.512003] page dumped because: kasan: bad access detected [ 37.512692] [ 37.512914] Memory state around the buggy address: [ 37.513539] ffff88800eec1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.514434] ffff88800eec1700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.515338] >ffff88800eec1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.516252] ^ [ 37.516762] ffff88800eec1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.517699] ffff88800eec1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.518603] ================================================================== [ 37.519918] Disabling lock debugging due to kernel taint [ 39.430242] BUG: Bad rss-counter state mm:00000000ecaaca74 type:MM_FILEPAGES val:33 [ 39.431245] BUG: Bad rss-counter state mm:00000000ecaaca74 type:MM_ANONPAGES val:22 [ 39.922630] BUG: Bad rss-counter state mm:00000000aad23ab0 type:MM_FILEPAGES val:33 [ 39.923638] BUG: Bad rss-counter state mm:00000000aad23ab0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4997' (ECDSA) to the list of known hosts. 2023/06/20 03:40:20 fuzzer started 2023/06/20 03:40:21 dialing manager at localhost:44161 2023/06/20 03:40:21 checking machine... 2023/06/20 03:40:21 checking revisions... [ 40.638442] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:40:21 testing simple program... [ 40.688710] cgroup: Unknown subsys name 'net' [ 40.745243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:40:14 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=00007ffdabe407d8 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=00007f070cff6510000055b1c14d5790 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=00007f8fdc011cf0 RBX=0000563dcb8cb570 RCX=00007f8fdc011e40 RDX=0000000000000060 RSI=00007ffe9aee3a70 RDI=00007f8fdc011e00 RBP=00007ffe9aee3e00 RSP=00007ffe9aee3898 R8 =fffffffffffffff0 R9 =0000000000135cb0 R10=0000000000000002 R11=00007f8fdc011cf0 R12=00007ffe9aee47b0 R13=0000000000000000 R14=1aef8456a517958d R15=00007ffe9aee3960 RIP=00007f8fdd41ecc6 RFL=00000283 [--S---C] 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 00007f8fdcaf1900 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=00007f8fdbf66010 CR3=000000000ee0c000 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=b3285ca56c489dff000000000010ee98 XMM01=d59e07bde36eea69000000000011d9e8 XMM02=ec2efd57dc4c00df000000000011daf0 XMM03=0581792828388295000000000011dbc0 XMM04=abbf964443beb37f00000000000ae988 XMM05=19e9129bd510f23500000000001347f8 XMM06=691710e9814e724e0000000000133660 XMM07=e042d86d42eb936e0000000000124ef0 XMM08=0581792828388295000000000011dbc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000