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05 April 2024, 19:32:26 UTC
Revision e1e12e97ac73ded85f7d000da1063a774b3cc14f authored by Patrick Steinhardt on 01 December 2022, 14:45:36 UTC, committed by Junio C Hamano on 05 December 2022, 06:14:16 UTC 
attr: fix integer overflow with more than INT_MAX macros
 
Attributes have a field that tracks the position in the `all_attrs`
array they're stored inside. This field gets set via `hashmap_get_size`
when adding the attribute to the global map of attributes. But while the
field is of type `int`, the value returned by `hashmap_get_size` is an
`unsigned int`. It can thus happen that the value overflows, where we
would now dereference teh `all_attrs` array at an out-of-bounds value.

We do have a sanity check for this overflow via an assert that verifies
the index matches the new hashmap's size. But asserts are not a proper
mechanism to detect against any such overflows as they may not in fact
be compiled into production code.

Fix this by using an `unsigned int` to track the index and convert the
assert to a call `die()`.

Reported-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
1 parent 447ac90
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Tip revision: e1e12e97ac73ded85f7d000da1063a774b3cc14f authored by Patrick Steinhardt on 01 December 2022, 14:45:36 UTC
attr: fix integer overflow with more than INT_MAX macros
Tip revision: e1e12e9
progress.h 
#ifndef PROGRESS_H
#define PROGRESS_H

struct progress;

#ifdef GIT_TEST_PROGRESS_ONLY

extern int progress_testing;
extern uint64_t progress_test_ns;
void progress_test_force_update(void);

#endif

void display_throughput(struct progress *progress, uint64_t total);
void display_progress(struct progress *progress, uint64_t n);
struct progress *start_progress(const char *title, uint64_t total);
struct progress *start_sparse_progress(const char *title, uint64_t total);
struct progress *start_delayed_progress(const char *title, uint64_t total);
struct progress *start_delayed_sparse_progress(const char *title,
					       uint64_t total);
void stop_progress(struct progress **progress);
void stop_progress_msg(struct progress **progress, const char *msg);

#endif
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