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Merge tag 'writeback_for_v5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

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Pull writeback fix from Jan Kara:
 "A fix of possible missing string termination in writeback tracepoints"

* tag 'writeback_for_v5.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  trace: fix potenial dangerous pointer
This commit is contained in:
Linus Torvalds
2020-11-27 10:36:38 -08:00
parent 85a2c56cb4 fdeb17c70c
commit 5b4049d8fc
1 changed files with 4 additions and 4 deletions
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8
include/trace/events/writeback.h
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@@ -190,7 +190,7 @@ TRACE_EVENT(inode_foreign_history,
),
TP_fast_assign(
strncpy(__entry->name, bdi_dev_name(inode_to_bdi(inode)), 32);
strscpy_pad(__entry->name, bdi_dev_name(inode_to_bdi(inode)), 32);
__entry->ino = inode->i_ino;
__entry->cgroup_ino = __trace_wbc_assign_cgroup(wbc);
__entry->history = history;
@@ -219,7 +219,7 @@ TRACE_EVENT(inode_switch_wbs,
),
TP_fast_assign(
strncpy(__entry->name, bdi_dev_name(old_wb->bdi), 32);
strscpy_pad(__entry->name, bdi_dev_name(old_wb->bdi), 32);
__entry->ino = inode->i_ino;
__entry->old_cgroup_ino = __trace_wb_assign_cgroup(old_wb);
__entry->new_cgroup_ino = __trace_wb_assign_cgroup(new_wb);
@@ -252,7 +252,7 @@ TRACE_EVENT(track_foreign_dirty,
struct address_space *mapping = page_mapping(page);
struct inode *inode = mapping ? mapping->host : NULL;
strncpy(__entry->name, bdi_dev_name(wb->bdi), 32);
strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32);
__entry->bdi_id = wb->bdi->id;
__entry->ino = inode ? inode->i_ino : 0;
__entry->memcg_id = wb->memcg_css->id;
@@ -285,7 +285,7 @@ TRACE_EVENT(flush_foreign,
),
TP_fast_assign(
strncpy(__entry->name, bdi_dev_name(wb->bdi), 32);
strscpy_pad(__entry->name, bdi_dev_name(wb->bdi), 32);
__entry->cgroup_ino = __trace_wb_assign_cgroup(wb);
__entry->frn_bdi_id = frn_bdi_id;
__entry->frn_memcg_id = frn_memcg_id;