> > Hello, > > syzbot found the following issue on: > > HEAD commit: 4d145e3f830b Merge tag 'i2c-for-6.10-rc8' of git://git.ker.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=11321495980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6b5a15443200e31 > dashboard link: > https://syzkaller.appspot.com/bug?extid=ec4b7d82bb051330f15a > compiler: aarch64-linux-gnu-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU > Binutils for Debian) 2.40 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=113e054e980000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1366ab85980000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot- > assets/384ffdcca292/non_bootable_disk-4d145e3f.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/28dead26b828/vmlinux- > 4d145e3f.xz > kernel image: https://storage.googleapis.com/syzbot- > assets/079a7ff04a12/Image-4d145e3f.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+ec4b7d82bb051330f15a@xxxxxxxxxxxxxxxxxxxxxxxxx > > BUG: Bad page cache in process syz-executor356 pfn:ba081 > page: refcount:4 mapcount:1 mapping:000000000e551739 index:0x0 > pfn:0xba081 > memcg:f7f0000002c3a000 > aops:shmem_aops ino:3 > flags: > 0x1ffc0000004002d(locked|referenced|uptodate|lru|swapbacked|node=0|zon > e=0|lastcpupid=0x7ff|kasantag=0x0) > raw: 01ffc0000004002d ffffc1ffc01cd7c8 ffffc1ffc1e86288 f9f000000749ba50 > raw: 0000000000000000 0000000000000000 0000000400000000 > f7f0000002c3a000 > page dumped because: still mapped when deleted > CPU: 0 PID: 3196 Comm: syz-executor356 Not tainted 6.10.0-rc7-syzkaller- > 00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > filemap_unaccount_folio+0x118/0x278 mm/filemap.c:167 > __filemap_remove_folio+0x3c/0x178 mm/filemap.c:231 > filemap_remove_folio+0x48/0xa8 mm/filemap.c:264 > truncate_inode_folio+0x30/0x4c mm/truncate.c:195 > shmem_undo_range+0x208/0x620 mm/shmem.c:1012 > shmem_truncate_range mm/shmem.c:1125 [inline] > shmem_evict_inode+0x130/0x2dc mm/shmem.c:1253 > evict+0xb4/0x198 fs/inode.c:667 > iput_final fs/inode.c:1741 [inline] > iput fs/inode.c:1767 [inline] > iput+0x100/0x1b8 fs/inode.c:1753 > dentry_unlink_inode+0xc0/0x188 fs/dcache.c:404 > __dentry_kill+0x7c/0x1d4 fs/dcache.c:607 > dput.part.0+0x30/0xbc fs/dcache.c:849 > dput+0x4c/0x50 fs/dcache.c:860 > __fput+0x110/0x2d4 fs/file_table.c:430 > __fput_sync+0x50/0x5c fs/file_table.c:507 > __do_sys_close fs/open.c:1563 [inline] > __se_sys_close fs/open.c:1548 [inline] > __arm64_sys_close+0x38/0x7c fs/open.c:1548 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > BUG: Bad page cache in process syz-executor356 pfn:ba18a > page: refcount:4 mapcount:1 mapping:000000000e551739 index:0x1 > pfn:0xba18a > memcg:f7f0000002c3a000 > aops:shmem_aops ino:3 > flags: > 0x1ffc0000004002d(locked|referenced|uptodate|lru|swapbacked|node=0|zon > e=0|lastcpupid=0x7ff|kasantag=0x0) > raw: 01ffc0000004002d ffffc1ffc1e82048 ffffc1ffc028a2c8 f9f000000749ba50 > raw: 0000000000000001 0000000000000000 0000000400000000 > f7f0000002c3a000 > page dumped because: still mapped when deleted > CPU: 0 PID: 3196 Comm: syz-executor356 Tainted: G B 6.10.0-rc7- > syzkaller-00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > filemap_unaccount_folio+0x118/0x278 mm/filemap.c:167 > __filemap_remove_folio+0x3c/0x178 mm/filemap.c:231 > filemap_remove_folio+0x48/0xa8 mm/filemap.c:264 > truncate_inode_folio+0x30/0x4c mm/truncate.c:195 > shmem_undo_range+0x208/0x620 mm/shmem.c:1012 > shmem_truncate_range mm/shmem.c:1125 [inline] > shmem_evict_inode+0x130/0x2dc mm/shmem.c:1253 > evict+0xb4/0x198 fs/inode.c:667 > iput_final fs/inode.c:1741 [inline] > iput fs/inode.c:1767 [inline] > iput+0x100/0x1b8 fs/inode.c:1753 > dentry_unlink_inode+0xc0/0x188 fs/dcache.c:404 > __dentry_kill+0x7c/0x1d4 fs/dcache.c:607 > dput.part.0+0x30/0xbc fs/dcache.c:849 > dput+0x4c/0x50 fs/dcache.c:860 > __fput+0x110/0x2d4 fs/file_table.c:430 > __fput_sync+0x50/0x5c fs/file_table.c:507 > __do_sys_close fs/open.c:1563 [inline] > __se_sys_close fs/open.c:1548 [inline] > __arm64_sys_close+0x38/0x7c fs/open.c:1548 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > BUG: Bad page map in process syz-executor356 pte:600000ba0818c3 > pmd:800000047670003 > page: refcount:1 mapcount:-1 mapping:0000000000000000 index:0x0 > pfn:0xba081 > memcg:f7f0000002c3a000 > flags: > 0x1ffc0000004002c(referenced|uptodate|lru|swapbacked|node=0|zone=0|last > cpupid=0x7ff|kasantag=0x0) > raw: 01ffc0000004002c ffffc1ffc028c708 ffffc1ffc1e86288 0000000000000000 > raw: 0000000000000000 0000000000000000 00000001fffffffe > f7f0000002c3a000 > page dumped because: bad pte > addr:00000000209a0000 vm_flags:400000f9 anon_vma:0000000000000000 > mapping:f3f0000006dcee48 index:0 > file:dmabuf fault:udmabuf_vm_fault mmap:dma_buf_mmap_internal > read_folio:0x0 > CPU: 0 PID: 3196 Comm: syz-executor356 Tainted: G B 6.10.0-rc7- > syzkaller-00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > print_bad_pte+0x1c8/0x258 mm/memory.c:538 > zap_present_folio_ptes mm/memory.c:1508 [inline] > zap_present_ptes mm/memory.c:1564 [inline] > zap_pte_range mm/memory.c:1606 [inline] > zap_pmd_range mm/memory.c:1724 [inline] > zap_pud_range mm/memory.c:1753 [inline] > zap_p4d_range mm/memory.c:1774 [inline] > unmap_page_range+0x904/0x1190 mm/memory.c:1795 > unmap_single_vma.constprop.0+0x4c/0x84 mm/memory.c:1841 > unmap_vmas+0x7c/0x170 mm/memory.c:1885 > exit_mmap+0xc0/0x288 mm/mmap.c:3341 > __mmput+0x3c/0x170 kernel/fork.c:1346 > mmput+0x50/0x5c kernel/fork.c:1368 > exit_mm kernel/exit.c:567 [inline] > do_exit+0x270/0x98c kernel/exit.c:863 > do_group_exit+0x34/0x90 kernel/exit.c:1025 > __do_sys_exit_group kernel/exit.c:1036 [inline] > __se_sys_exit_group kernel/exit.c:1034 [inline] > pid_child_should_wake+0x0/0x5c kernel/exit.c:1034 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > BUG: Bad page map in process syz-executor356 pte:600000ba18a8c3 > pmd:800000047670003 > page: refcount:1 mapcount:-1 mapping:0000000000000000 index:0x1 > pfn:0xba18a > memcg:f7f0000002c3a000 > flags: > 0x1ffc0000004002c(referenced|uptodate|lru|swapbacked|node=0|zone=0|last > cpupid=0x7ff|kasantag=0x0) > raw: 01ffc0000004002c ffffc1ffc1e82048 ffffc1ffc028a2c8 0000000000000000 > raw: 0000000000000001 0000000000000000 00000001fffffffe > f7f0000002c3a000 > page dumped because: bad pte > addr:00000000209a1000 vm_flags:400000f9 anon_vma:0000000000000000 > mapping:f3f0000006dcee48 index:1 > file:dmabuf fault:udmabuf_vm_fault mmap:dma_buf_mmap_internal > read_folio:0x0 > CPU: 0 PID: 3196 Comm: syz-executor356 Tainted: G B 6.10.0-rc7- > syzkaller-00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > print_bad_pte+0x1c8/0x258 mm/memory.c:538 > zap_present_folio_ptes mm/memory.c:1508 [inline] > zap_present_ptes mm/memory.c:1564 [inline] > zap_pte_range mm/memory.c:1606 [inline] > zap_pmd_range mm/memory.c:1724 [inline] > zap_pud_range mm/memory.c:1753 [inline] > zap_p4d_range mm/memory.c:1774 [inline] > unmap_page_range+0x904/0x1190 mm/memory.c:1795 > unmap_single_vma.constprop.0+0x4c/0x84 mm/memory.c:1841 > unmap_vmas+0x7c/0x170 mm/memory.c:1885 > exit_mmap+0xc0/0x288 mm/mmap.c:3341 > __mmput+0x3c/0x170 kernel/fork.c:1346 > mmput+0x50/0x5c kernel/fork.c:1368 > exit_mm kernel/exit.c:567 [inline] > do_exit+0x270/0x98c kernel/exit.c:863 > do_group_exit+0x34/0x90 kernel/exit.c:1025 > __do_sys_exit_group kernel/exit.c:1036 [inline] > __se_sys_exit_group kernel/exit.c:1034 [inline] > pid_child_should_wake+0x0/0x5c kernel/exit.c:1034 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > BUG: Bad page state in process syz-executor356 pfn:ba081 > page: refcount:0 mapcount:-1 mapping:0000000000000000 index:0x0 > pfn:0xba081 > flags: > 0x1ffc0000004000c(referenced|uptodate|swapbacked|node=0|zone=0|lastcpu > pid=0x7ff|kasantag=0x0) > raw: 01ffc0000004000c dead000000000100 dead000000000122 > 0000000000000000 > raw: 0000000000000000 0000000000000000 00000000fffffffe > 0000000000000000 > page dumped because: nonzero mapcount > Modules linked in: > CPU: 0 PID: 3196 Comm: syz-executor356 Tainted: G B 6.10.0-rc7- > syzkaller-00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > bad_page+0x84/0x11c mm/page_alloc.c:498 > free_page_is_bad_report+0x98/0xa4 mm/page_alloc.c:904 > free_page_is_bad mm/page_alloc.c:914 [inline] > free_pages_prepare mm/page_alloc.c:1085 [inline] > free_unref_folios+0x4c0/0x624 mm/page_alloc.c:2637 > folios_put_refs+0x108/0x284 mm/swap.c:1024 > free_pages_and_swap_cache+0x14c/0x164 mm/swap_state.c:332 > __tlb_batch_free_encoded_pages+0x4c/0xdc mm/mmu_gather.c:136 > tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] > tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] > tlb_flush_mmu mm/mmu_gather.c:373 [inline] > tlb_finish_mmu+0x84/0x200 mm/mmu_gather.c:465 > exit_mmap+0x13c/0x288 mm/mmap.c:3354 > __mmput+0x3c/0x170 kernel/fork.c:1346 > mmput+0x50/0x5c kernel/fork.c:1368 > exit_mm kernel/exit.c:567 [inline] > do_exit+0x270/0x98c kernel/exit.c:863 > do_group_exit+0x34/0x90 kernel/exit.c:1025 > __do_sys_exit_group kernel/exit.c:1036 [inline] > __se_sys_exit_group kernel/exit.c:1034 [inline] > pid_child_should_wake+0x0/0x5c kernel/exit.c:1034 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > BUG: Bad page state in process syz-executor356 pfn:ba18a > page: refcount:0 mapcount:-1 mapping:0000000000000000 index:0x1 > pfn:0xba18a > flags: > 0x1ffc0000004000c(referenced|uptodate|swapbacked|node=0|zone=0|lastcpu > pid=0x7ff|kasantag=0x0) > raw: 01ffc0000004000c dead000000000100 dead000000000122 > 0000000000000000 > raw: 0000000000000001 0000000000000000 00000000fffffffe > 0000000000000000 > page dumped because: nonzero mapcount > Modules linked in: > CPU: 0 PID: 3196 Comm: syz-executor356 Tainted: G B 6.10.0-rc7- > syzkaller-00266-g4d145e3f830b #0 > Hardware name: linux,dummy-virt (DT) > Call trace: > dump_backtrace+0x94/0xec arch/arm64/kernel/stacktrace.c:317 > show_stack+0x18/0x24 arch/arm64/kernel/stacktrace.c:324 > __dump_stack lib/dump_stack.c:88 [inline] > dump_stack_lvl+0x78/0x90 lib/dump_stack.c:114 > dump_stack+0x18/0x24 lib/dump_stack.c:123 > bad_page+0x84/0x11c mm/page_alloc.c:498 > free_page_is_bad_report+0x98/0xa4 mm/page_alloc.c:904 > free_page_is_bad mm/page_alloc.c:914 [inline] > free_pages_prepare mm/page_alloc.c:1085 [inline] > free_unref_folios+0x4c0/0x624 mm/page_alloc.c:2637 > folios_put_refs+0x108/0x284 mm/swap.c:1024 > free_pages_and_swap_cache+0x14c/0x164 mm/swap_state.c:332 > __tlb_batch_free_encoded_pages+0x4c/0xdc mm/mmu_gather.c:136 > tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] > tlb_flush_mmu_free mm/mmu_gather.c:366 [inline] > tlb_flush_mmu mm/mmu_gather.c:373 [inline] > tlb_finish_mmu+0x84/0x200 mm/mmu_gather.c:465 > exit_mmap+0x13c/0x288 mm/mmap.c:3354 > __mmput+0x3c/0x170 kernel/fork.c:1346 > mmput+0x50/0x5c kernel/fork.c:1368 > exit_mm kernel/exit.c:567 [inline] > do_exit+0x270/0x98c kernel/exit.c:863 > do_group_exit+0x34/0x90 kernel/exit.c:1025 > __do_sys_exit_group kernel/exit.c:1036 [inline] > __se_sys_exit_group kernel/exit.c:1034 [inline] > pid_child_should_wake+0x0/0x5c kernel/exit.c:1034 > __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline] > invoke_syscall+0x48/0x118 arch/arm64/kernel/syscall.c:48 > el0_svc_common.constprop.0+0x40/0xe0 arch/arm64/kernel/syscall.c:131 > do_el0_svc+0x1c/0x28 arch/arm64/kernel/syscall.c:150 > el0_svc+0x34/0xf8 arch/arm64/kernel/entry-common.c:712 > el0t_64_sync_handler+0x100/0x12c arch/arm64/kernel/entry-common.c:730 > el0t_64_sync+0x19c/0x1a0 arch/arm64/kernel/entry.S:598 > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup #syz test: https://gitlab.freedesktop.org/Vivek/drm-tip.git syzbot_fix_remove_inode
