syzkaller login: [ 42.481508] BUG: Bad rss-counter state mm:000000006c43f6c5 type:MM_FILEPAGES val:33 [ 42.482714] BUG: Bad rss-counter state mm:000000006c43f6c5 type:MM_ANONPAGES val:22 [ 42.525667] ================================================================== [ 42.526749] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.527782] Read of size 8 at addr ffff88800f1916b0 by task sshd/219 [ 42.528615] [ 42.528960] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.529912] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.530885] Call Trace: [ 42.531203] <TASK> [ 42.531511] dump_stack_lvl+0x91/0xf0 [ 42.532130] print_report+0xcc/0x620 [ 42.532630] ? __virt_addr_valid+0x102/0x340 [ 42.533221] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.533965] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.534631] kasan_report+0xbe/0xf0 [ 42.535217] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.535925] vma_interval_tree_remove+0xc75/0xec0 [ 42.536639] vma_prepare+0xc54/0x11a0 [ 42.537227] __split_vma+0x5af/0x950 [ 42.537702] ? __pfx___split_vma+0x10/0x10 [ 42.538235] ? find_held_lock+0x2c/0x110 [ 42.538759] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.539330] ? lock_is_held_type+0x9f/0x120 [ 42.539875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.540496] ? mtree_range_walk+0x632/0x900 [ 42.541047] ? mas_walk+0x5c7/0x7c0 [ 42.541514] do_vmi_munmap+0x1f1/0x2b0 [ 42.542009] mmap_region+0x1f9/0x2660 [ 42.542491] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.543003] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.543721] ? __pfx_lock_acquire+0x10/0x10 [ 42.544269] ? __pfx_mmap_region+0x10/0x10 [ 42.544798] ? security_mmap_addr+0x7d/0xa0 [ 42.545323] ? get_unmapped_area+0x1f5/0x3f0 [ 42.545868] do_mmap+0x854/0xf00 [ 42.546302] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.546803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.547357] ksys_mmap_pgoff+0x3af/0x500 [ 42.547858] do_syscall_64+0x3f/0x90 [ 42.548345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.548993] RIP: 0033:0x7fae336a6d82 [ 42.549452] 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 [ 42.551578] RSP: 002b:00007fff3d6e69c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.552510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fae336a6d82 [ 42.553353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fae32ae0000 [ 42.554204] RBP: 00007fae32ae0000 R08: 0000000000000009 R09: 0000000000001000 [ 42.555052] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c583a7bf70 [ 42.555910] R13: 00007fff3d6e69e0 R14: 00007fff3d6e6a10 R15: 00007fff3d6e6d70 [ 42.556769] </TASK> [ 42.557064] [ 42.557284] Allocated by task 211: [ 42.557712] kasan_save_stack+0x22/0x50 [ 42.558220] kasan_set_track+0x25/0x30 [ 42.558711] __kasan_slab_alloc+0x59/0x70 [ 42.559236] kmem_cache_alloc+0x16b/0x370 [ 42.559757] vm_area_dup+0x20/0x160 [ 42.560217] __split_vma+0x170/0x950 [ 42.560682] split_vma+0xc6/0x110 [ 42.561120] mprotect_fixup+0x8d2/0xb30 [ 42.561628] do_mprotect_pkey+0x87e/0xd40 [ 42.562147] __x64_sys_mprotect+0x78/0xc0 [ 42.562668] do_syscall_64+0x3f/0x90 [ 42.563148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.563787] [ 42.564026] Freed by task 202: [ 42.564416] kasan_save_stack+0x22/0x50 [ 42.564913] kasan_set_track+0x25/0x30 [ 42.565413] kasan_save_free_info+0x2b/0x50 [ 42.565949] __kasan_slab_free+0x10a/0x190 [ 42.566482] kmem_cache_free+0x10d/0x4d0 [ 42.566994] rcu_core+0x8c8/0x2860 [ 42.567433] __do_softirq+0x1b7/0x7d4 [ 42.567917] [ 42.568131] Last potentially related work creation: [ 42.568715] kasan_save_stack+0x22/0x50 [ 42.569225] __kasan_record_aux_stack+0x8e/0xa0 [ 42.569804] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.570526] remove_vma+0x139/0x170 [ 42.570980] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.571534] do_vmi_munmap+0x1f1/0x2b0 [ 42.572035] __vm_munmap+0x138/0x3a0 [ 42.572509] __x64_sys_munmap+0x59/0x80 [ 42.573006] do_syscall_64+0x3f/0x90 [ 42.573477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.574116] [ 42.574335] The buggy address belongs to the object at ffff88800f191658 [ 42.574335] which belongs to the cache vm_area_struct of size 168 [ 42.575797] The buggy address is located 88 bytes inside of [ 42.575797] freed 168-byte region [ffff88800f191658, ffff88800f191700) [ 42.577208] [ 42.577426] The buggy address belongs to the physical page: [ 42.578090] page:000000007f1ec648 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf191 [ 42.579173] memcg:ffff88800c49c801 [ 42.579602] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.580312] page_type: 0xffffffff() [ 42.580761] raw: 0100000000000200 ffff88800879fc80 ffffea0000373840 dead000000000005 [ 42.581678] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c49c801 [ 42.582582] page dumped because: kasan: bad access detected [ 42.583253] [ 42.583473] Memory state around the buggy address: [ 42.584074] ffff88800f191580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 42.584926] ffff88800f191600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 42.585779] >ffff88800f191680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.586630] ^ [ 42.587213] ffff88800f191700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 42.588069] ffff88800f191780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 42.588915] ================================================================== [ 42.589849] Disabling lock debugging due to kernel taint [ 44.582101] BUG: Bad rss-counter state mm:0000000041d7bff9 type:MM_FILEPAGES val:33 [ 44.583060] BUG: Bad rss-counter state mm:0000000041d7bff9 type:MM_ANONPAGES val:22 [ 45.086733] BUG: Bad rss-counter state mm:000000005888b432 type:MM_FILEPAGES val:33 [ 45.087774] BUG: Bad rss-counter state mm:000000005888b432 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50659' (ECDSA) to the list of known hosts. 2023/06/20 07:06:06 fuzzer started 2023/06/20 07:06:07 dialing manager at localhost:44161 2023/06/20 07:06:07 checking machine... 2023/06/20 07:06:07 checking revisions... [ 45.827522] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:06:07 testing simple program... [ 45.877291] cgroup: Unknown subsys name 'net' [ 45.915401] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:06:03 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff84506c7f RCX=ffffffff863b1c01 RDX=1ffff110031e0f47 RSI=0000000000000000 RDI=ffffffff84506c7f RBP=ffffffff84506c7f RSP=ffff888018f07988 R8 =ffffffff863b1c9a R9 =ffff888018f07a20 R10=0000000000038001 R11=000000000008a977 R12=ffff888018f07aa8 R13=0000000000000000 R14=ffff88800f240000 R15=ffff88800c6c8850 RIP=ffffffff811fc6f7 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f41cd630900 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=00007f41cdbe80b0 CR3=000000000cb4c000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff110028eee68 RSP=ffff888014777330 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=0000000000092c40 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007fb6028d7900 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=00007fb601ced440 CR3=0000000009cbc000 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=e7b2717ec978760d00000000000ae988 XMM05=859b0ef07fe48bb800000000001350a8 XMM06=c291bd5c70af25b90000000000133b28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000